Adding upstream version 0.5.upstream/0.5upstream

Signed-off-by: Daniel Baumann <daniel@debian.org>

19 files changed, 14262 insertions, 0 deletions

diff --git a/.build-aux/compile b/.build-aux/compile
new file mode 100755
index 0000000..a85b723
--- /dev/null
+++ b/.build-aux/compile
@@ -0,0 +1,347 @@
+#! /bin/sh
+# Wrapper for compilers which do not understand '-c -o'.
+
+scriptversion=2012-10-14.11; # UTC
+
+# Copyright (C) 1999-2014 Free Software Foundation, Inc.
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent tools from complaining about whitespace usage.
+IFS=" ""	$nl"
+
+file_conv=
+
+# func_file_conv build_file lazy
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts. If the determined conversion
+# type is listed in (the comma separated) LAZY, no conversion will
+# take place.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv/,$2, in
+	*,$file_conv,*)
+	  ;;
+	mingw/*)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin/*)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine/*)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_cl_dashL linkdir
+# Make cl look for libraries in LINKDIR
+func_cl_dashL ()
+{
+  func_file_conv "$1"
+  if test -z "$lib_path"; then
+    lib_path=$file
+  else
+    lib_path="$lib_path;$file"
+  fi
+  linker_opts="$linker_opts -LIBPATH:$file"
+}
+
+# func_cl_dashl library
+# Do a library search-path lookup for cl
+func_cl_dashl ()
+{
+  lib=$1
+  found=no
+  save_IFS=$IFS
+  IFS=';'
+  for dir in $lib_path $LIB
+  do
+    IFS=$save_IFS
+    if $shared && test -f "$dir/$lib.dll.lib"; then
+      found=yes
+      lib=$dir/$lib.dll.lib
+      break
+    fi
+    if test -f "$dir/$lib.lib"; then
+      found=yes
+      lib=$dir/$lib.lib
+      break
+    fi
+    if test -f "$dir/lib$lib.a"; then
+      found=yes
+      lib=$dir/lib$lib.a
+      break
+    fi
+  done
+  IFS=$save_IFS
+
+  if test "$found" != yes; then
+    lib=$lib.lib
+  fi
+}
+
+# func_cl_wrapper cl arg...
+# Adjust compile command to suit cl
+func_cl_wrapper ()
+{
+  # Assume a capable shell
+  lib_path=
+  shared=:
+  linker_opts=
+  for arg
+  do
+    if test -n "$eat"; then
+      eat=
+    else
+      case $1 in
+	-o)
+	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
+	  eat=1
+	  case $2 in
+	    *.o | *.[oO][bB][jJ])
+	      func_file_conv "$2"
+	      set x "$@" -Fo"$file"
+	      shift
+	      ;;
+	    *)
+	      func_file_conv "$2"
+	      set x "$@" -Fe"$file"
+	      shift
+	      ;;
+	  esac
+	  ;;
+	-I)
+	  eat=1
+	  func_file_conv "$2" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-I*)
+	  func_file_conv "${1#-I}" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-l)
+	  eat=1
+	  func_cl_dashl "$2"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-l*)
+	  func_cl_dashl "${1#-l}"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-L)
+	  eat=1
+	  func_cl_dashL "$2"
+	  ;;
+	-L*)
+	  func_cl_dashL "${1#-L}"
+	  ;;
+	-static)
+	  shared=false
+	  ;;
+	-Wl,*)
+	  arg=${1#-Wl,}
+	  save_ifs="$IFS"; IFS=','
+	  for flag in $arg; do
+	    IFS="$save_ifs"
+	    linker_opts="$linker_opts $flag"
+	  done
+	  IFS="$save_ifs"
+	  ;;
+	-Xlinker)
+	  eat=1
+	  linker_opts="$linker_opts $2"
+	  ;;
+	-*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
+	  func_file_conv "$1"
+	  set x "$@" -Tp"$file"
+	  shift
+	  ;;
+	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
+	  func_file_conv "$1" mingw
+	  set x "$@" "$file"
+	  shift
+	  ;;
+	*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+      esac
+    fi
+    shift
+  done
+  if test -n "$linker_opts"; then
+    linker_opts="-link$linker_opts"
+  fi
+  exec "$@" $linker_opts
+  exit 1
+}
+
+eat=
+
+case $1 in
+  '')
+     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: compile [--help] [--version] PROGRAM [ARGS]
+
+Wrapper for compilers which do not understand '-c -o'.
+Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
+arguments, and rename the output as expected.
+
+If you are trying to build a whole package this is not the
+right script to run: please start by reading the file 'INSTALL'.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "compile $scriptversion"
+    exit $?
+    ;;
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
+    func_cl_wrapper "$@"      # Doesn't return...
+    ;;
+esac
+
+ofile=
+cfile=
+
+for arg
+do
+  if test -n "$eat"; then
+    eat=
+  else
+    case $1 in
+      -o)
+	# configure might choose to run compile as 'compile cc -o foo foo.c'.
+	# So we strip '-o arg' only if arg is an object.
+	eat=1
+	case $2 in
+	  *.o | *.obj)
+	    ofile=$2
+	    ;;
+	  *)
+	    set x "$@" -o "$2"
+	    shift
+	    ;;
+	esac
+	;;
+      *.c)
+	cfile=$1
+	set x "$@" "$1"
+	shift
+	;;
+      *)
+	set x "$@" "$1"
+	shift
+	;;
+    esac
+  fi
+  shift
+done
+
+if test -z "$ofile" || test -z "$cfile"; then
+  # If no '-o' option was seen then we might have been invoked from a
+  # pattern rule where we don't need one.  That is ok -- this is a
+  # normal compilation that the losing compiler can handle.  If no
+  # '.c' file was seen then we are probably linking.  That is also
+  # ok.
+  exec "$@"
+fi
+
+# Name of file we expect compiler to create.
+cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
+
+# Create the lock directory.
+# Note: use '[/\\:.-]' here to ensure that we don't use the same name
+# that we are using for the .o file.  Also, base the name on the expected
+# object file name, since that is what matters with a parallel build.
+lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
+while true; do
+  if mkdir "$lockdir" >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+# FIXME: race condition here if user kills between mkdir and trap.
+trap "rmdir '$lockdir'; exit 1" 1 2 15
+
+# Run the compile.
+"$@"
+ret=$?
+
+if test -f "$cofile"; then
+  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
+elif test -f "${cofile}bj"; then
+  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
+fi
+
+rmdir "$lockdir"
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/.build-aux/depcomp b/.build-aux/depcomp
new file mode 100755
index 0000000..fc98710
--- /dev/null
+++ b/.build-aux/depcomp
@@ -0,0 +1,791 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2013-05-30.07; # UTC
+
+# Copyright (C) 1999-2014 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputting dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the "deleted header file" problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+## Some versions of gcc put a space before the ':'.  On the theory
+## that the space means something, we add a space to the output as
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like '#:fec' to the end of the
+    # dependency line.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  set_dir_from "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using '\' :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d
+
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"
+
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi
+
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for ':'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
+  "$@" $dashmflag |
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+        set fnord "$@"
+        shift
+        shift
+        ;;
+    *)
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/.build-aux/install-sh b/.build-aux/install-sh
new file mode 100755
index 0000000..0b0fdcb
--- /dev/null
+++ b/.build-aux/install-sh
@@ -0,0 +1,501 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2013-12-25.23; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# 'make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+tab='	'
+nl='
+'
+IFS=" $tab$nl"
+
+# Set DOITPROG to "echo" to test this script.
+
+doit=${DOITPROG-}
+doit_exec=${doit:-exec}
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+is_target_a_directory=possibly
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+        shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+        case $mode in
+          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
+            echo "$0: invalid mode: $mode" >&2
+            exit 1;;
+        esac
+        shift;;
+
+    -o) chowncmd="$chownprog $2"
+        shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t)
+        is_target_a_directory=always
+        dst_arg=$2
+        # Protect names problematic for 'test' and other utilities.
+        case $dst_arg in
+          -* | [=\(\)!]) dst_arg=./$dst_arg;;
+        esac
+        shift;;
+
+    -T) is_target_a_directory=never;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --) shift
+        break;;
+
+    -*) echo "$0: invalid option: $1" >&2
+        exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+# We allow the use of options -d and -T together, by making -d
+# take the precedence; this is for compatibility with GNU install.
+
+if test -n "$dir_arg"; then
+  if test -n "$dst_arg"; then
+    echo "$0: target directory not allowed when installing a directory." >&2
+    exit 1
+  fi
+fi
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call 'install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  if test $# -gt 1 || test "$is_target_a_directory" = always; then
+    if test ! -d "$dst_arg"; then
+      echo "$0: $dst_arg: Is not a directory." >&2
+      exit 1
+    fi
+  fi
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names problematic for 'test' and other utilities.
+  case $src in
+    -* | [=\(\)!]) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+    dst=$dst_arg
+
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test "$is_target_a_directory" = never; then
+        echo "$0: $dst_arg: Is a directory" >&2
+        exit 1
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      dstdir=`dirname "$dst"`
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+        # Create intermediate dirs using mode 755 as modified by the umask.
+        # This is like FreeBSD 'install' as of 1997-10-28.
+        umask=`umask`
+        case $stripcmd.$umask in
+          # Optimize common cases.
+          *[2367][2367]) mkdir_umask=$umask;;
+          .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+          *[0-7])
+            mkdir_umask=`expr $umask + 22 \
+              - $umask % 100 % 40 + $umask % 20 \
+              - $umask % 10 % 4 + $umask % 2
+            `;;
+          *) mkdir_umask=$umask,go-w;;
+        esac
+
+        # With -d, create the new directory with the user-specified mode.
+        # Otherwise, rely on $mkdir_umask.
+        if test -n "$dir_arg"; then
+          mkdir_mode=-m$mode
+        else
+          mkdir_mode=
+        fi
+
+        posix_mkdir=false
+        case $umask in
+          *[123567][0-7][0-7])
+            # POSIX mkdir -p sets u+wx bits regardless of umask, which
+            # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+            ;;
+          *)
+            tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+            trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+            if (umask $mkdir_umask &&
+                exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
+            then
+              if test -z "$dir_arg" || {
+                   # Check for POSIX incompatibilities with -m.
+                   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+                   # other-writable bit of parent directory when it shouldn't.
+                   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+                   ls_ld_tmpdir=`ls -ld "$tmpdir"`
+                   case $ls_ld_tmpdir in
+                     d????-?r-*) different_mode=700;;
+                     d????-?--*) different_mode=755;;
+                     *) false;;
+                   esac &&
+                   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
+                     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
+                     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+                   }
+                 }
+              then posix_mkdir=:
+              fi
+              rmdir "$tmpdir/d" "$tmpdir"
+            else
+              # Remove any dirs left behind by ancient mkdir implementations.
+              rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
+            fi
+            trap '' 0;;
+        esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+        umask $mkdir_umask &&
+        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+        /*) prefix='/';;
+        [-=\(\)!]*) prefix='./';;
+        *)  prefix='';;
+      esac
+
+      oIFS=$IFS
+      IFS=/
+      set -f
+      set fnord $dstdir
+      shift
+      set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+        test X"$d" = X && continue
+
+        prefix=$prefix$d
+        if test -d "$prefix"; then
+          prefixes=
+        else
+          if $posix_mkdir; then
+            (umask=$mkdir_umask &&
+             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+            # Don't fail if two instances are running concurrently.
+            test -d "$prefix" || exit 1
+          else
+            case $prefix in
+              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+              *) qprefix=$prefix;;
+            esac
+            prefixes="$prefixes '$qprefix'"
+          fi
+        fi
+        prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+        # Don't fail if two instances are running concurrently.
+        (umask $mkdir_umask &&
+         eval "\$doit_exec \$mkdirprog $prefixes") ||
+          test -d "$dstdir" || exit 1
+        obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
+       set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       set +f &&
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+        # Now remove or move aside any old file at destination location.
+        # We try this two ways since rm can't unlink itself on some
+        # systems and the destination file might be busy for other
+        # reasons.  In this case, the final cleanup might fail but the new
+        # file should still install successfully.
+        {
+          test ! -f "$dst" ||
+          $doit $rmcmd -f "$dst" 2>/dev/null ||
+          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+            { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+          } ||
+          { echo "$0: cannot unlink or rename $dst" >&2
+            (exit 1); exit 1
+          }
+        } &&
+
+        # Now rename the file to the real destination.
+        $doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/.build-aux/missing b/.build-aux/missing
new file mode 100755
index 0000000..f62bbae
--- /dev/null
+++ b/.build-aux/missing
@@ -0,0 +1,215 @@
+#! /bin/sh
+# Common wrapper for a few potentially missing GNU programs.
+
+scriptversion=2013-10-28.13; # UTC
+
+# Copyright (C) 1996-2014 Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try '$0 --help' for more information"
+  exit 1
+fi
+
+case $1 in
+
+  --is-lightweight)
+    # Used by our autoconf macros to check whether the available missing
+    # script is modern enough.
+    exit 0
+    ;;
+
+  --run)
+    # Back-compat with the calling convention used by older automake.
+    shift
+    ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
+to PROGRAM being missing or too old.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+
+Supported PROGRAM values:
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
+  bison     yacc      flex         lex       help2man
+
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
+'g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: unknown '$1' option"
+    echo 1>&2 "Try '$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# Run the given program, remember its exit status.
+"$@"; st=$?
+
+# If it succeeded, we are done.
+test $st -eq 0 && exit 0
+
+# Also exit now if we it failed (or wasn't found), and '--version' was
+# passed; such an option is passed most likely to detect whether the
+# program is present and works.
+case $2 in --version|--help) exit $st;; esac
+
+# Exit code 63 means version mismatch.  This often happens when the user
+# tries to use an ancient version of a tool on a file that requires a
+# minimum version.
+if test $st -eq 63; then
+  msg="probably too old"
+elif test $st -eq 127; then
+  # Program was missing.
+  msg="missing on your system"
+else
+  # Program was found and executed, but failed.  Give up.
+  exit $st
+fi
+
+perl_URL=http://www.perl.org/
+flex_URL=http://flex.sourceforge.net/
+gnu_software_URL=http://www.gnu.org/software
+
+program_details ()
+{
+  case $1 in
+    aclocal|automake)
+      echo "The '$1' program is part of the GNU Automake package:"
+      echo "<$gnu_software_URL/automake>"
+      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/autoconf>"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+    autoconf|autom4te|autoheader)
+      echo "The '$1' program is part of the GNU Autoconf package:"
+      echo "<$gnu_software_URL/autoconf/>"
+      echo "It also requires GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+  esac
+}
+
+give_advice ()
+{
+  # Normalize program name to check for.
+  normalized_program=`echo "$1" | sed '
+    s/^gnu-//; t
+    s/^gnu//; t
+    s/^g//; t'`
+
+  printf '%s\n' "'$1' is $msg."
+
+  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
+  case $normalized_program in
+    autoconf*)
+      echo "You should only need it if you modified 'configure.ac',"
+      echo "or m4 files included by it."
+      program_details 'autoconf'
+      ;;
+    autoheader*)
+      echo "You should only need it if you modified 'acconfig.h' or"
+      echo "$configure_deps."
+      program_details 'autoheader'
+      ;;
+    automake*)
+      echo "You should only need it if you modified 'Makefile.am' or"
+      echo "$configure_deps."
+      program_details 'automake'
+      ;;
+    aclocal*)
+      echo "You should only need it if you modified 'acinclude.m4' or"
+      echo "$configure_deps."
+      program_details 'aclocal'
+      ;;
+   autom4te*)
+      echo "You might have modified some maintainer files that require"
+      echo "the 'autom4te' program to be rebuilt."
+      program_details 'autom4te'
+      ;;
+    bison*|yacc*)
+      echo "You should only need it if you modified a '.y' file."
+      echo "You may want to install the GNU Bison package:"
+      echo "<$gnu_software_URL/bison/>"
+      ;;
+    lex*|flex*)
+      echo "You should only need it if you modified a '.l' file."
+      echo "You may want to install the Fast Lexical Analyzer package:"
+      echo "<$flex_URL>"
+      ;;
+    help2man*)
+      echo "You should only need it if you modified a dependency" \
+           "of a man page."
+      echo "You may want to install the GNU Help2man package:"
+      echo "<$gnu_software_URL/help2man/>"
+    ;;
+    makeinfo*)
+      echo "You should only need it if you modified a '.texi' file, or"
+      echo "any other file indirectly affecting the aspect of the manual."
+      echo "You might want to install the Texinfo package:"
+      echo "<$gnu_software_URL/texinfo/>"
+      echo "The spurious makeinfo call might also be the consequence of"
+      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
+      echo "want to install GNU make:"
+      echo "<$gnu_software_URL/make/>"
+      ;;
+    *)
+      echo "You might have modified some files without having the proper"
+      echo "tools for further handling them.  Check the 'README' file, it"
+      echo "often tells you about the needed prerequisites for installing"
+      echo "this package.  You may also peek at any GNU archive site, in"
+      echo "case some other package contains this missing '$1' program."
+      ;;
+  esac
+}
+
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
+                       -e '2,$s/^/         /' >&2
+
+# Propagate the correct exit status (expected to be 127 for a program
+# not found, 63 for a program that failed due to version mismatch).
+exit $st
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..1580fd8
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,26 @@
+# these will be installed in BINDIR
+bin_PROGRAMS = dag_scrubber #scramble_ips 
+#dist_bin_SCRIPTS = lander_reanonymize
+
+dag_scrubber_SOURCES = dag_scrubber.c cryptopANT.c cryptopANT.h
+dag_scrubber_SOURCES += patricia.c patricia.h
+dag_scrubber_SOURCES += scramble_wlw.c scramble_wlw.h
+#scramble_ips_SOURCES = scramble_ips.c cryptopANT.c cryptopANT.h
+AM_LDFLAGS= -lcrypto -lpcap
+
+RPMBUILD_SRC  = ~/rpmbuild/SOURCES/$(distdir).tar.gz
+RPMBUILD_SPEC = ~/rpmbuild/SPECS/dag_scrubber.spec
+
+#validate: scramble_ips keyfile
+#	@./scramble_ips keyfile <ip4s | ./scramble_ips -r keyfile | cmp -l ip4s - \
+#	  && echo "ipv4 scrambling/descrambling validation passed" \
+#	  || echo "ipv4 scrambling/descrambling failed"
+#	@./scramble_ips keyfile <ip6s | ./scramble_ips -r keyfile | cmp -l ip6s - \
+#	  && echo "ipv6 scrambling/descrambling validation passed" \
+#	  || echo "ipv6 scrambling/descrambling failed"
+
+.PHONY: rpmbuild
+rpmbuild: dist-gzip
+	cp dag_scrubber.spec $(RPMBUILD_SPEC)
+	cp $(distdir).tar.gz $(RPMBUILD_SRC)
+	rpmbuild -ba $(RPMBUILD_SPEC)
diff --git a/Makefile.in b/Makefile.in
new file mode 100644
index 0000000..ad18ebc
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,806 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+bin_PROGRAMS = dag_scrubber$(EXEEXT)
+subdir = .
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(top_srcdir)/configure \
+	$(am__configure_deps) $(am__DIST_COMMON)
+am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \
+ configure.lineno config.status.lineno
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = config.h
+CONFIG_CLEAN_FILES = dag_scrubber.spec
+CONFIG_CLEAN_VPATH_FILES =
+am__installdirs = "$(DESTDIR)$(bindir)"
+PROGRAMS = $(bin_PROGRAMS)
+am_dag_scrubber_OBJECTS = dag_scrubber.$(OBJEXT) cryptopANT.$(OBJEXT) \
+	patricia.$(OBJEXT) scramble_wlw.$(OBJEXT)
+dag_scrubber_OBJECTS = $(am_dag_scrubber_OBJECTS)
+dag_scrubber_LDADD = $(LDADD)
+AM_V_P = $(am__v_P_@AM_V@)
+am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
+am__v_P_0 = false
+am__v_P_1 = :
+AM_V_GEN = $(am__v_GEN_@AM_V@)
+am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@)
+am__v_GEN_0 = @echo "  GEN     " $@;
+am__v_GEN_1 = 
+AM_V_at = $(am__v_at_@AM_V@)
+am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
+am__v_at_0 = @
+am__v_at_1 = 
+DEFAULT_INCLUDES = -I.@am__isrc@
+depcomp = $(SHELL) $(top_srcdir)/.build-aux/depcomp
+am__maybe_remake_depfiles = depfiles
+am__depfiles_remade = ./$(DEPDIR)/cryptopANT.Po \
+	./$(DEPDIR)/dag_scrubber.Po ./$(DEPDIR)/patricia.Po \
+	./$(DEPDIR)/scramble_wlw.Po
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
+am__v_CC_0 = @echo "  CC      " $@;
+am__v_CC_1 = 
+CCLD = $(CC)
+LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
+am__v_CCLD_1 = 
+SOURCES = $(dag_scrubber_SOURCES)
+DIST_SOURCES = $(dag_scrubber_SOURCES)
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP) \
+	config.h.in
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
+  unique=`for i in $$list; do \
+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
+AM_RECURSIVE_TARGETS = cscope
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/config.h.in \
+	$(srcdir)/dag_scrubber.spec.in \
+	$(top_srcdir)/.build-aux/compile \
+	$(top_srcdir)/.build-aux/depcomp \
+	$(top_srcdir)/.build-aux/install-sh \
+	$(top_srcdir)/.build-aux/missing .build-aux/compile \
+	.build-aux/depcomp .build-aux/install-sh .build-aux/missing \
+	README
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
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+top_distdir = $(distdir)
+am__remove_distdir = \
+  if test -d "$(distdir)"; then \
+    find "$(distdir)" -type d ! -perm -200 -exec chmod u+w {} ';' \
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+      || { sleep 5 && rm -rf "$(distdir)"; }; \
+  else :; fi
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+AM_DISTCHECK_DVI_TARGET = dvi
+distuninstallcheck_listfiles = find . -type f -print
+am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \
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+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
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+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
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+LDFLAGS = @LDFLAGS@
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+MAKEINFO = @MAKEINFO@
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+docdir = @docdir@
+dvidir = @dvidir@
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+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
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+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+#dist_bin_SCRIPTS = lander_reanonymize
+dag_scrubber_SOURCES = dag_scrubber.c cryptopANT.c cryptopANT.h \
+	patricia.c patricia.h scramble_wlw.c scramble_wlw.h
+#scramble_ips_SOURCES = scramble_ips.c cryptopANT.c cryptopANT.h
+AM_LDFLAGS = -lcrypto -lpcap
+RPMBUILD_SRC = ~/rpmbuild/SOURCES/$(distdir).tar.gz
+RPMBUILD_SPEC = ~/rpmbuild/SPECS/dag_scrubber.spec
+all: config.h
+	$(MAKE) $(AM_MAKEFLAGS) all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+am--refresh: Makefile
+	@:
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      echo ' cd $(srcdir) && $(AUTOMAKE) --foreign'; \
+	      $(am__cd) $(srcdir) && $(AUTOMAKE) --foreign \
+		&& exit 0; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    echo ' $(SHELL) ./config.status'; \
+	    $(SHELL) ./config.status;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	$(SHELL) ./config.status --recheck
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	$(am__cd) $(srcdir) && $(AUTOCONF)
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	$(am__cd) $(srcdir) && $(ACLOCAL) $(ACLOCAL_AMFLAGS)
+$(am__aclocal_m4_deps):
+
+config.h: stamp-h1
+	@test -f $@ || rm -f stamp-h1
+	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) stamp-h1
+
+stamp-h1: $(srcdir)/config.h.in $(top_builddir)/config.status
+	@rm -f stamp-h1
+	cd $(top_builddir) && $(SHELL) ./config.status config.h
+$(srcdir)/config.h.in:  $(am__configure_deps) 
+	($(am__cd) $(top_srcdir) && $(AUTOHEADER))
+	rm -f stamp-h1
+	touch $@
+
+distclean-hdr:
+	-rm -f config.h stamp-h1
+dag_scrubber.spec: $(top_builddir)/config.status $(srcdir)/dag_scrubber.spec.in
+	cd $(top_builddir) && $(SHELL) ./config.status $@
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p \
+	  ; then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	      echo " $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	      $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+	-test -z "$(bin_PROGRAMS)" || rm -f $(bin_PROGRAMS)
+
+dag_scrubber$(EXEEXT): $(dag_scrubber_OBJECTS) $(dag_scrubber_DEPENDENCIES) $(EXTRA_dag_scrubber_DEPENDENCIES) 
+	@rm -f dag_scrubber$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(dag_scrubber_OBJECTS) $(dag_scrubber_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cryptopANT.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dag_scrubber.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/patricia.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scramble_wlw.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
+
+.c.obj:
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+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
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+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
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+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
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+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
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+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+	test ! -s cscope.files \
+	  || $(CSCOPE) -b -q $(AM_CSCOPEFLAGS) $(CSCOPEFLAGS) -i cscope.files $(CSCOPE_ARGS)
+clean-cscope:
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+cscope.files: clean-cscope cscopelist
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+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
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+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+	-rm -f cscope.out cscope.in.out cscope.po.out cscope.files
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+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
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+	test -d "$(distdir)" || mkdir "$(distdir)"
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+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
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+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	-test -n "$(am__skip_mode_fix)" \
+	|| find "$(distdir)" -type d ! -perm -755 \
+		-exec chmod u+rwx,go+rx {} \; -o \
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+	  ! -type d ! -perm -400 -exec chmod a+r {} \; -o \
+	  ! -type d ! -perm -444 -exec $(install_sh) -c -m a+r {} {} \; \
+	|| chmod -R a+r "$(distdir)"
+dist-gzip: distdir
+	tardir=$(distdir) && $(am__tar) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).tar.gz
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+dist-bzip2: distdir
+	tardir=$(distdir) && $(am__tar) | BZIP2=$${BZIP2--9} bzip2 -c >$(distdir).tar.bz2
+	$(am__post_remove_distdir)
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+dist-lzip: distdir
+	tardir=$(distdir) && $(am__tar) | lzip -c $${LZIP_OPT--9} >$(distdir).tar.lz
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+dist-xz: distdir
+	tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz
+	$(am__post_remove_distdir)
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+dist-zstd: distdir
+	tardir=$(distdir) && $(am__tar) | zstd -c $${ZSTD_CLEVEL-$${ZSTD_OPT--19}} >$(distdir).tar.zst
+	$(am__post_remove_distdir)
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+dist-tarZ: distdir
+	@echo WARNING: "Support for distribution archives compressed with" \
+		       "legacy program 'compress' is deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
+	$(am__post_remove_distdir)
+
+dist-shar: distdir
+	@echo WARNING: "Support for shar distribution archives is" \
+	               "deprecated." >&2
+	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
+	shar $(distdir) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).shar.gz
+	$(am__post_remove_distdir)
+
+dist-zip: distdir
+	-rm -f $(distdir).zip
+	zip -rq $(distdir).zip $(distdir)
+	$(am__post_remove_distdir)
+
+dist dist-all:
+	$(MAKE) $(AM_MAKEFLAGS) $(DIST_TARGETS) am__post_remove_distdir='@:'
+	$(am__post_remove_distdir)
+
+# This target untars the dist file and tries a VPATH configuration.  Then
+# it guarantees that the distribution is self-contained by making another
+# tarfile.
+distcheck: dist
+	case '$(DIST_ARCHIVES)' in \
+	*.tar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).tar.gz | $(am__untar) ;;\
+	*.tar.bz2*) \
+	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
+	*.tar.lz*) \
+	  lzip -dc $(distdir).tar.lz | $(am__untar) ;;\
+	*.tar.xz*) \
+	  xz -dc $(distdir).tar.xz | $(am__untar) ;;\
+	*.tar.Z*) \
+	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
+	*.shar.gz*) \
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).shar.gz | unshar ;;\
+	*.zip*) \
+	  unzip $(distdir).zip ;;\
+	*.tar.zst*) \
+	  zstd -dc $(distdir).tar.zst | $(am__untar) ;;\
+	esac
+	chmod -R a-w $(distdir)
+	chmod u+w $(distdir)
+	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
+	chmod a-w $(distdir)
+	test -d $(distdir)/_build || exit 0; \
+	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
+	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
+	  && am__cwd=`pwd` \
+	  && $(am__cd) $(distdir)/_build/sub \
+	  && ../../configure \
+	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
+	    $(DISTCHECK_CONFIGURE_FLAGS) \
+	    --srcdir=../.. --prefix="$$dc_install_base" \
+	  && $(MAKE) $(AM_MAKEFLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) $(AM_DISTCHECK_DVI_TARGET) \
+	  && $(MAKE) $(AM_MAKEFLAGS) check \
+	  && $(MAKE) $(AM_MAKEFLAGS) install \
+	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
+	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
+	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
+	        distuninstallcheck \
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+
+#validate: scramble_ips keyfile
+#	@./scramble_ips keyfile <ip4s | ./scramble_ips -r keyfile | cmp -l ip4s - \
+#	  && echo "ipv4 scrambling/descrambling validation passed" \
+#	  || echo "ipv4 scrambling/descrambling failed"
+#	@./scramble_ips keyfile <ip6s | ./scramble_ips -r keyfile | cmp -l ip6s - \
+#	  && echo "ipv6 scrambling/descrambling validation passed" \
+#	  || echo "ipv6 scrambling/descrambling failed"
+
+.PHONY: rpmbuild
+rpmbuild: dist-gzip
+	cp dag_scrubber.spec $(RPMBUILD_SPEC)
+	cp $(distdir).tar.gz $(RPMBUILD_SRC)
+	rpmbuild -ba $(RPMBUILD_SPEC)
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/README b/README
new file mode 100644
index 0000000..f183b9b
--- /dev/null
+++ b/README
@@ -0,0 +1,73 @@
+README
+
+$Id$
+
+This directory contains two utilities used by LANDER project:
+
+	http://www.isi.edu/ant/lander/
+
+for removing user data from packet traces and anonymizing IP addresses
+"dag_scrubber" and "scramble_ips".  
+
+dag_scrubber - reads input packet tracefile in ERF format (produced by
+  DAG capture cards) and does two things.  The first function is
+  dubbed "scrubbing" and is designed to zero out or chop off (if at
+  the end of the packet) all user data.  "User data" is a vague term;
+  it's precise definition in the dag_scrubber context can be derived
+  from the dag_scrubber decision tree described in the accompanying
+  file "scrubber_decisiontree.txt".
+
+  The second process, called "scrambling", performs cryptography-based
+  prefix-preserving IP address anonymization for both IPv4 and IPv6
+  addresses.  This algorithm was published by Jun Xu, Jinliang Fan,
+  Mostafa Ammar, and Sue Moon in "Prefix-Preserving IP Address
+  Anonymization: Measurement-based Security Evaluation and a New
+  Cryptography-based Scheme":
+
+	http://www.cc.gatech.edu/computing/Telecomm/cryptopan/icnp02.ps
+
+  This code does not derive from the Crypto-PAn package, and is an
+  independent implementation of the ideas described in the paper.
+
+scramble_ips - allows the user to scramble some known IP addresses and
+  find out their anonymized counterparts.  This is useful, for
+  example, if your trace contains traffic to your server and you'd
+  like to know the server's address to find traffic addressed to/from
+  it in the scrambled trace.  Note that it should be very hard to find
+  the reverse mapping (i.e. from scrambled to unscrambled addresses) if
+  the key is not available.  If the key is available, the "reverse"-
+  mode of this tool allows to recover original addresses (-r switch).
+
+CHANGELOG.txt contains details about changes made to this software
+package.
+
+
+PLATFORMS
+
+These utilities have been tested only on x86-based platforms running
+GNU-Linux.  In particular, we've tested them on RedHat Entriprise
+Linux AS release 3, Fedora Core 3, and Fedora Core 4.  Note, that we
+HAVE NOT tested this code on any big-endian machines; one potential
+caveat could be related to memory acessing unaligned packet header
+structures, but we have not explored this issue.  We may address this
+in future releases.
+ 
+
+BUILDING BINARIES
+
+ 1. Make sure you have installed PCAP and SSL libraries in
+    standard places.  Without these libraries linking of the binaries
+    will fail.
+ 2. Run make and pray.
+
+
+VALIDATIONS
+
+Sample sets of random IP addresses (both IPv4 and IPv6) have been
+added to the distribution, as well as a sample keyfile.  These can
+be used for simple validation of the prefix-preserving properties of
+the crypto-scrambling code.  To run validations, type:
+	make validate
+It may take a minute or two (especially for IPv6 addresses) to 
+complete, because unscrambling operations are relatively slow.
+ 
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new file mode 100644
index 0000000..2154e6d
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+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_$1_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_$1_dependencies_compiler_type=none
+fi
+])
+AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
+AM_CONDITIONAL([am__fastdep$1], [
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
+])
+
+
+# AM_SET_DEPDIR
+# -------------
+# Choose a directory name for dependency files.
+# This macro is AC_REQUIREd in _AM_DEPENDENCIES.
+AC_DEFUN([AM_SET_DEPDIR],
+[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
+])
+
+
+# AM_DEP_TRACK
+# ------------
+AC_DEFUN([AM_DEP_TRACK],
+[AC_ARG_ENABLE([dependency-tracking], [dnl
+AS_HELP_STRING(
+  [--enable-dependency-tracking],
+  [do not reject slow dependency extractors])
+AS_HELP_STRING(
+  [--disable-dependency-tracking],
+  [speeds up one-time build])])
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+  am__nodep='_no'
+fi
+AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
+AC_SUBST([AMDEPBACKSLASH])dnl
+_AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
+AC_SUBST([am__nodep])dnl
+_AM_SUBST_NOTMAKE([am__nodep])dnl
+])
+
+# Generate code to set up dependency tracking.              -*- Autoconf -*-
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_OUTPUT_DEPENDENCY_COMMANDS
+# ------------------------------
+AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
+[{
+  # Older Autoconf quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  AS_CASE([$CONFIG_FILES],
+          [*\'*], [eval set x "$CONFIG_FILES"],
+          [*], [set x $CONFIG_FILES])
+  shift
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
+  do
+    # Strip MF so we end up with the name of the file.
+    am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`AS_DIRNAME(["$am_mf"])`
+    am_filepart=`AS_BASENAME(["$am_mf"])`
+    AM_RUN_LOG([cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles]) || am_rc=$?
+  done
+  if test $am_rc -ne 0; then
+    AC_MSG_FAILURE([Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE="gmake" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).])
+  fi
+  AS_UNSET([am_dirpart])
+  AS_UNSET([am_filepart])
+  AS_UNSET([am_mf])
+  AS_UNSET([am_rc])
+  rm -f conftest-deps.mk
+}
+])# _AM_OUTPUT_DEPENDENCY_COMMANDS
+
+
+# AM_OUTPUT_DEPENDENCY_COMMANDS
+# -----------------------------
+# This macro should only be invoked once -- use via AC_REQUIRE.
+#
+# This code is only required when automatic dependency tracking is enabled.
+# This creates each '.Po' and '.Plo' makefile fragment that we'll need in
+# order to bootstrap the dependency handling code.
+AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
+[AC_CONFIG_COMMANDS([depfiles],
+     [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
+     [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])
+
+# Do all the work for Automake.                             -*- Autoconf -*-
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This macro actually does too much.  Some checks are only needed if
+# your package does certain things.  But this isn't really a big deal.
+
+dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
+m4_define([AC_PROG_CC],
+m4_defn([AC_PROG_CC])
+[_AM_PROG_CC_C_O
+])
+
+# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
+# AM_INIT_AUTOMAKE([OPTIONS])
+# -----------------------------------------------
+# The call with PACKAGE and VERSION arguments is the old style
+# call (pre autoconf-2.50), which is being phased out.  PACKAGE
+# and VERSION should now be passed to AC_INIT and removed from
+# the call to AM_INIT_AUTOMAKE.
+# We support both call styles for the transition.  After
+# the next Automake release, Autoconf can make the AC_INIT
+# arguments mandatory, and then we can depend on a new Autoconf
+# release and drop the old call support.
+AC_DEFUN([AM_INIT_AUTOMAKE],
+[AC_PREREQ([2.65])dnl
+m4_ifdef([_$0_ALREADY_INIT],
+  [m4_fatal([$0 expanded multiple times
+]m4_defn([_$0_ALREADY_INIT]))],
+  [m4_define([_$0_ALREADY_INIT], m4_expansion_stack)])dnl
+dnl Autoconf wants to disallow AM_ names.  We explicitly allow
+dnl the ones we care about.
+m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
+AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
+AC_REQUIRE([AC_PROG_INSTALL])dnl
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+AC_SUBST([CYGPATH_W])
+
+# Define the identity of the package.
+dnl Distinguish between old-style and new-style calls.
+m4_ifval([$2],
+[AC_DIAGNOSE([obsolete],
+             [$0: two- and three-arguments forms are deprecated.])
+m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
+ AC_SUBST([PACKAGE], [$1])dnl
+ AC_SUBST([VERSION], [$2])],
+[_AM_SET_OPTIONS([$1])dnl
+dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
+m4_if(
+  m4_ifset([AC_PACKAGE_NAME], [ok]):m4_ifset([AC_PACKAGE_VERSION], [ok]),
+  [ok:ok],,
+  [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
+ AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
+ AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
+
+_AM_IF_OPTION([no-define],,
+[AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package])
+ AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl
+
+# Some tools Automake needs.
+AC_REQUIRE([AM_SANITY_CHECK])dnl
+AC_REQUIRE([AC_ARG_PROGRAM])dnl
+AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
+AM_MISSING_PROG([AUTOCONF], [autoconf])
+AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
+AM_MISSING_PROG([AUTOHEADER], [autoheader])
+AM_MISSING_PROG([MAKEINFO], [makeinfo])
+AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
+AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
+AC_REQUIRE([AC_PROG_AWK])dnl
+AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
+	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
+			     [_AM_PROG_TAR([v7])])])
+_AM_IF_OPTION([no-dependencies],,
+[AC_PROVIDE_IFELSE([AC_PROG_CC],
+		  [_AM_DEPENDENCIES([CC])],
+		  [m4_define([AC_PROG_CC],
+			     m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_CXX],
+		  [_AM_DEPENDENCIES([CXX])],
+		  [m4_define([AC_PROG_CXX],
+			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJC],
+		  [_AM_DEPENDENCIES([OBJC])],
+		  [m4_define([AC_PROG_OBJC],
+			     m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
+		  [_AM_DEPENDENCIES([OBJCXX])],
+		  [m4_define([AC_PROG_OBJCXX],
+			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
+])
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+AC_SUBST([CTAGS])
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+AC_SUBST([ETAGS])
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+AC_SUBST([CSCOPE])
+
+AC_REQUIRE([AM_SILENT_RULES])dnl
+dnl The testsuite driver may need to know about EXEEXT, so add the
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+dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
+AC_CONFIG_COMMANDS_PRE(dnl
+[m4_provide_if([_AM_COMPILER_EXEEXT],
+  [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
+
+# POSIX will say in a future version that running "rm -f" with no argument
+# is OK; and we want to be able to make that assumption in our Makefile
+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <https://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
+  fi
+fi
+dnl The trailing newline in this macro's definition is deliberate, for
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+dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
+])
+
+dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
+dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
+dnl mangled by Autoconf and run in a shell conditional statement.
+m4_define([_AC_COMPILER_EXEEXT],
+m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
+
+# When config.status generates a header, we must update the stamp-h file.
+# This file resides in the same directory as the config header
+# that is generated.  The stamp files are numbered to have different names.
+
+# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
+# loop where config.status creates the headers, so we can generate
+# our stamp files there.
+AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
+[# Compute $1's index in $config_headers.
+_am_arg=$1
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_SH
+# ------------------
+# Define $install_sh.
+AC_DEFUN([AM_PROG_INSTALL_SH],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+if test x"${install_sh+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+AC_SUBST([install_sh])])
+
+# Copyright (C) 2003-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Check whether the underlying file-system supports filenames
+# with a leading dot.  For instance MS-DOS doesn't.
+AC_DEFUN([AM_SET_LEADING_DOT],
+[rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+AC_SUBST([am__leading_dot])])
+
+# Check to see how 'make' treats includes.	            -*- Autoconf -*-
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MAKE_INCLUDE()
+# -----------------
+# Check whether make has an 'include' directive that can support all
+# the idioms we need for our automatic dependency tracking code.
+AC_DEFUN([AM_MAKE_INCLUDE],
+[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
+cat > confinc.mk << 'END'
+am__doit:
+	@echo this is the am__doit target >confinc.out
+.PHONY: am__doit
+END
+am__include="#"
+am__quote=
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
+  AS_CASE([$?:`cat confinc.out 2>/dev/null`],
+      ['0:this is the am__doit target'],
+      [AS_CASE([$s],
+          [BSD], [am__include='.include' am__quote='"'],
+          [am__include='include' am__quote=''])])
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+AC_MSG_RESULT([${_am_result}])
+AC_SUBST([am__include])])
+AC_SUBST([am__quote])])
+
+# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
+
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_MISSING_PROG(NAME, PROGRAM)
+# ------------------------------
+AC_DEFUN([AM_MISSING_PROG],
+[AC_REQUIRE([AM_MISSING_HAS_RUN])
+$1=${$1-"${am_missing_run}$2"}
+AC_SUBST($1)])
+
+# AM_MISSING_HAS_RUN
+# ------------------
+# Define MISSING if not defined so far and test if it is modern enough.
+# If it is, set am_missing_run to use it, otherwise, to nothing.
+AC_DEFUN([AM_MISSING_HAS_RUN],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${MISSING+set}" != xset; then
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
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+# Use eval to expand $SHELL
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
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+  am_missing_run=
+  AC_MSG_WARN(['missing' script is too old or missing])
+fi
+])
+
+# Helper functions for option handling.                     -*- Autoconf -*-
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_MANGLE_OPTION(NAME)
+# -----------------------
+AC_DEFUN([_AM_MANGLE_OPTION],
+[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
+
+# _AM_SET_OPTION(NAME)
+# --------------------
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+AC_DEFUN([_AM_SET_OPTION],
+[m4_define(_AM_MANGLE_OPTION([$1]), [1])])
+
+# _AM_SET_OPTIONS(OPTIONS)
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+# OPTIONS is a space-separated list of Automake options.
+AC_DEFUN([_AM_SET_OPTIONS],
+[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
+
+# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
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+AC_DEFUN([_AM_IF_OPTION],
+[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_CC_C_O
+# ---------------
+# Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
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+AC_DEFUN([_AM_PROG_CC_C_O],
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+AC_REQUIRE_AUX_FILE([compile])dnl
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+  [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
+  # Make sure it works both with $CC and with simple cc.
+  # Following AC_PROG_CC_C_O, we do the test twice because some
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+  # though they will create one.
+  am_cv_prog_cc_c_o=yes
+  for am_i in 1 2; do
+    if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
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+      am_cv_prog_cc_c_o=no
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+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
+   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
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+AC_LANG_POP([C])])
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+# For backward compatibility.
+AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
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+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_RUN_LOG(COMMAND)
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+# Run COMMAND, save the exit status in ac_status, and log it.
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+
+# Check to make sure that the build environment is sane.    -*- Autoconf -*-
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_SANITY_CHECK
+# ---------------
+AC_DEFUN([AM_SANITY_CHECK],
+[AC_MSG_CHECKING([whether build environment is sane])
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[[\\\"\#\$\&\'\`$am_lf]]*)
+    AC_MSG_ERROR([unsafe absolute working directory name]);;
+esac
+case $srcdir in
+  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
+    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
+esac
+
+# Do 'set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$[*]" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$[*]" != "X $srcdir/configure conftest.file" \
+	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment])
+     fi
+     if test "$[2]" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
+   test "$[2]" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   AC_MSG_ERROR([newly created file is older than distributed files!
+Check your system clock])
+fi
+AC_MSG_RESULT([yes])
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+AC_CONFIG_COMMANDS_PRE(
+  [AC_MSG_CHECKING([that generated files are newer than configure])
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   AC_MSG_RESULT([done])])
+rm -f conftest.file
+])
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_SILENT_RULES([DEFAULT])
+# --------------------------
+# Enable less verbose build rules; with the default set to DEFAULT
+# ("yes" being less verbose, "no" or empty being verbose).
+AC_DEFUN([AM_SILENT_RULES],
+[AC_ARG_ENABLE([silent-rules], [dnl
+AS_HELP_STRING(
+  [--enable-silent-rules],
+  [less verbose build output (undo: "make V=1")])
+AS_HELP_STRING(
+  [--disable-silent-rules],
+  [verbose build output (undo: "make V=0")])dnl
+])
+case $enable_silent_rules in @%:@ (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
+esac
+dnl
+dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
+dnl do not support nested variable expansions.
+dnl See automake bug#9928 and bug#10237.
+am_make=${MAKE-make}
+AC_CACHE_CHECK([whether $am_make supports nested variables],
+   [am_cv_make_support_nested_variables],
+   [if AS_ECHO([['TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi])
+if test $am_cv_make_support_nested_variables = yes; then
+  dnl Using '$V' instead of '$(V)' breaks IRIX make.
+  AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AC_SUBST([AM_V])dnl
+AM_SUBST_NOTMAKE([AM_V])dnl
+AC_SUBST([AM_DEFAULT_V])dnl
+AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
+AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
+AM_BACKSLASH='\'
+AC_SUBST([AM_BACKSLASH])dnl
+_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
+])
+
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_STRIP
+# ---------------------
+# One issue with vendor 'install' (even GNU) is that you can't
+# specify the program used to strip binaries.  This is especially
+# annoying in cross-compiling environments, where the build's strip
+# is unlikely to handle the host's binaries.
+# Fortunately install-sh will honor a STRIPPROG variable, so we
+# always use install-sh in "make install-strip", and initialize
+# STRIPPROG with the value of the STRIP variable (set by the user).
+AC_DEFUN([AM_PROG_INSTALL_STRIP],
+[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
+if test "$cross_compiling" != no; then
+  AC_CHECK_TOOL([STRIP], [strip], :)
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+AC_SUBST([INSTALL_STRIP_PROGRAM])])
+
+# Copyright (C) 2006-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
+# This macro is traced by Automake.
+AC_DEFUN([_AM_SUBST_NOTMAKE])
+
+# AM_SUBST_NOTMAKE(VARIABLE)
+# --------------------------
+# Public sister of _AM_SUBST_NOTMAKE.
+AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
+
+# Check how to create a tarball.                            -*- Autoconf -*-
+
+# Copyright (C) 2004-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_PROG_TAR(FORMAT)
+# --------------------
+# Check how to create a tarball in format FORMAT.
+# FORMAT should be one of 'v7', 'ustar', or 'pax'.
+#
+# Substitute a variable $(am__tar) that is a command
+# writing to stdout a FORMAT-tarball containing the directory
+# $tardir.
+#     tardir=directory && $(am__tar) > result.tar
+#
+# Substitute a variable $(am__untar) that extract such
+# a tarball read from stdin.
+#     $(am__untar) < result.tar
+#
+AC_DEFUN([_AM_PROG_TAR],
+[# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AC_SUBST([AMTAR], ['$${TAR-tar}'])
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
+
+m4_if([$1], [v7],
+  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
+
+  [m4_case([$1],
+    [ustar],
+     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
+      # There is notably a 21 bits limit for the UID and the GID.  In fact,
+      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
+      # and bug#13588).
+      am_max_uid=2097151 # 2^21 - 1
+      am_max_gid=$am_max_uid
+      # The $UID and $GID variables are not portable, so we need to resort
+      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
+      # below are definitely unexpected, so allow the users to see them
+      # (that is, avoid stderr redirection).
+      am_uid=`id -u || echo unknown`
+      am_gid=`id -g || echo unknown`
+      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
+      if test $am_uid -le $am_max_uid; then
+         AC_MSG_RESULT([yes])
+      else
+         AC_MSG_RESULT([no])
+         _am_tools=none
+      fi
+      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
+      if test $am_gid -le $am_max_gid; then
+         AC_MSG_RESULT([yes])
+      else
+        AC_MSG_RESULT([no])
+        _am_tools=none
+      fi],
+
+  [pax],
+    [],
+
+  [m4_fatal([Unknown tar format])])
+
+  AC_MSG_CHECKING([how to create a $1 tar archive])
+
+  # Go ahead even if we have the value already cached.  We do so because we
+  # need to set the values for the 'am__tar' and 'am__untar' variables.
+  _am_tools=${am_cv_prog_tar_$1-$_am_tools}
+
+  for _am_tool in $_am_tools; do
+    case $_am_tool in
+    gnutar)
+      for _am_tar in tar gnutar gtar; do
+        AM_RUN_LOG([$_am_tar --version]) && break
+      done
+      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
+      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
+      am__untar="$_am_tar -xf -"
+      ;;
+    plaintar)
+      # Must skip GNU tar: if it does not support --format= it doesn't create
+      # ustar tarball either.
+      (tar --version) >/dev/null 2>&1 && continue
+      am__tar='tar chf - "$$tardir"'
+      am__tar_='tar chf - "$tardir"'
+      am__untar='tar xf -'
+      ;;
+    pax)
+      am__tar='pax -L -x $1 -w "$$tardir"'
+      am__tar_='pax -L -x $1 -w "$tardir"'
+      am__untar='pax -r'
+      ;;
+    cpio)
+      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
+      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
+      am__untar='cpio -i -H $1 -d'
+      ;;
+    none)
+      am__tar=false
+      am__tar_=false
+      am__untar=false
+      ;;
+    esac
+
+    # If the value was cached, stop now.  We just wanted to have am__tar
+    # and am__untar set.
+    test -n "${am_cv_prog_tar_$1}" && break
+
+    # tar/untar a dummy directory, and stop if the command works.
+    rm -rf conftest.dir
+    mkdir conftest.dir
+    echo GrepMe > conftest.dir/file
+    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
+    rm -rf conftest.dir
+    if test -s conftest.tar; then
+      AM_RUN_LOG([$am__untar <conftest.tar])
+      AM_RUN_LOG([cat conftest.dir/file])
+      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
+    fi
+  done
+  rm -rf conftest.dir
+
+  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
+  AC_MSG_RESULT([$am_cv_prog_tar_$1])])
+
+AC_SUBST([am__tar])
+AC_SUBST([am__untar])
+]) # _AM_PROG_TAR
+
diff --git a/config.h.in b/config.h.in
new file mode 100644
index 0000000..bd3409c
--- /dev/null
+++ b/config.h.in
@@ -0,0 +1,57 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to 1 if all of the C90 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
+#undef STDC_HEADERS
+
+/* Version number of package */
+#undef VERSION
diff --git a/configure b/configure
new file mode 100755
index 0000000..daeac0c
--- /dev/null
+++ b/configure
@@ -0,0 +1,6043 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.71 for dag_scrubber 0.5.
+#
+# Report bugs to <yuri@isi.edu>.
+#
+#
+# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
+# Inc.
+#
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
+as_nl='
+'
+export as_nl
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
+
+# The user is always right.
+if ${PATH_SEPARATOR+false} :; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+
+# Use a proper internal environment variable to ensure we don't fall
+  # into an infinite loop, continuously re-executing ourselves.
+  if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
+    _as_can_reexec=no; export _as_can_reexec;
+    # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+  fi
+  # We don't want this to propagate to other subprocesses.
+          { _as_can_reexec=; unset _as_can_reexec;}
+if test "x$CONFIG_SHELL" = x; then
+  as_bourne_compatible="as_nop=:
+if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else \$as_nop
+  case \`(set -o) 2>/dev/null\` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+"
+  as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" )
+then :
+
+else \$as_nop
+  exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1
+blah=\$(echo \$(echo blah))
+test x\"\$blah\" = xblah || exit 1
+test -x / || exit 1"
+  as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+  as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+  eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1"
+  if (eval "$as_required") 2>/dev/null
+then :
+  as_have_required=yes
+else $as_nop
+  as_have_required=no
+fi
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
+then :
+
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+  as_found=:
+  case $as_dir in #(
+	 /*)
+	   for as_base in sh bash ksh sh5; do
+	     # Try only shells that exist, to save several forks.
+	     as_shell=$as_dir$as_base
+	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+		    as_run=a "$as_shell" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
+  CONFIG_SHELL=$as_shell as_have_required=yes
+		   if as_run=a "$as_shell" -c "$as_bourne_compatible""$as_suggested" 2>/dev/null
+then :
+  break 2
+fi
+fi
+	   done;;
+       esac
+  as_found=false
+done
+IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi
+fi
+
+
+      if test "x$CONFIG_SHELL" != x
+then :
+  export CONFIG_SHELL
+             # We cannot yet assume a decent shell, so we have to provide a
+# neutralization value for shells without unset; and this also
+# works around shells that cannot unset nonexistent variables.
+# Preserve -v and -x to the replacement shell.
+BASH_ENV=/dev/null
+ENV=/dev/null
+(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+case $- in # ((((
+  *v*x* | *x*v* ) as_opts=-vx ;;
+  *v* ) as_opts=-v ;;
+  *x* ) as_opts=-x ;;
+  * ) as_opts= ;;
+esac
+exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
+# Admittedly, this is quite paranoid, since all the known shells bail
+# out after a failed `exec'.
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
+fi
+
+    if test x$as_have_required = xno
+then :
+  printf "%s\n" "$0: This script requires a shell more modern than all"
+  printf "%s\n" "$0: the shells that I found on your system."
+  if test ${ZSH_VERSION+y} ; then
+    printf "%s\n" "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
+  else
+    printf "%s\n" "$0: Please tell bug-autoconf@gnu.org and yuri@isi.edu about
+$0: your system, including any error possibly output before
+$0: this message. Then install a modern shell, or manually
+$0: run the script under such a shell if you do have one."
+  fi
+  exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else $as_nop
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else $as_nop
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  printf "%s\n" "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+  as_lineno_1=$LINENO as_lineno_1a=$LINENO
+  as_lineno_2=$LINENO as_lineno_2a=$LINENO
+  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
+  sed -n '
+    p
+    /[$]LINENO/=
+  ' <$as_myself |
+    sed '
+      s/[$]LINENO.*/&-/
+      t lineno
+      b
+      :lineno
+      N
+      :loop
+      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
+      t loop
+      s/-\n.*//
+    ' >$as_me.lineno &&
+  chmod +x "$as_me.lineno" ||
+    { printf "%s\n" "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+
+  # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
+  # already done that, so ensure we don't try to do so again and fall
+  # in an infinite loop.  This has already happened in practice.
+  _as_can_reexec=no; export _as_can_reexec
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensitive to this).
+  . "./$as_me.lineno"
+  # Exit status is that of the last command.
+  exit
+}
+
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
+
+# Name of the host.
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_clean_files=
+ac_config_libobj_dir=.
+LIBOBJS=
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+
+# Identity of this package.
+PACKAGE_NAME='dag_scrubber'
+PACKAGE_TARNAME='dag_scrubber'
+PACKAGE_VERSION='0.5'
+PACKAGE_STRING='dag_scrubber 0.5'
+PACKAGE_BUGREPORT='yuri@isi.edu'
+PACKAGE_URL=''
+
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stddef.h>
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
+#endif
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_header_c_list=
+ac_subst_vars='am__EXEEXT_FALSE
+am__EXEEXT_TRUE
+LTLIBOBJS
+LIBOBJS
+LN_S
+am__fastdepCC_FALSE
+am__fastdepCC_TRUE
+CCDEPMODE
+am__nodep
+AMDEPBACKSLASH
+AMDEP_FALSE
+AMDEP_TRUE
+am__include
+DEPDIR
+OBJEXT
+EXEEXT
+ac_ct_CC
+CPPFLAGS
+LDFLAGS
+CFLAGS
+CC
+AM_BACKSLASH
+AM_DEFAULT_VERBOSITY
+AM_DEFAULT_V
+AM_V
+CSCOPE
+ETAGS
+CTAGS
+am__untar
+am__tar
+AMTAR
+am__leading_dot
+SET_MAKE
+AWK
+mkdir_p
+MKDIR_P
+INSTALL_STRIP_PROGRAM
+STRIP
+install_sh
+MAKEINFO
+AUTOHEADER
+AUTOMAKE
+AUTOCONF
+ACLOCAL
+VERSION
+PACKAGE
+CYGPATH_W
+am__isrc
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
+RELEASE
+target_alias
+host_alias
+build_alias
+LIBS
+ECHO_T
+ECHO_N
+ECHO_C
+DEFS
+mandir
+localedir
+libdir
+psdir
+pdfdir
+dvidir
+htmldir
+infodir
+docdir
+oldincludedir
+includedir
+runstatedir
+localstatedir
+sharedstatedir
+sysconfdir
+datadir
+datarootdir
+libexecdir
+sbindir
+bindir
+program_transform_name
+prefix
+exec_prefix
+PACKAGE_URL
+PACKAGE_BUGREPORT
+PACKAGE_STRING
+PACKAGE_VERSION
+PACKAGE_TARNAME
+PACKAGE_NAME
+PATH_SEPARATOR
+SHELL
+am__quote'
+ac_subst_files=''
+ac_user_opts='
+enable_option_checking
+enable_silent_rules
+enable_dependency_tracking
+'
+      ac_precious_vars='build_alias
+host_alias
+target_alias
+CC
+CFLAGS
+LDFLAGS
+LIBS
+CPPFLAGS'
+
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+ac_unrecognized_opts=
+ac_unrecognized_sep=
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+# (The list follows the same order as the GNU Coding Standards.)
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datarootdir='${prefix}/share'
+datadir='${datarootdir}'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
+infodir='${datarootdir}/info'
+htmldir='${docdir}'
+dvidir='${docdir}'
+pdfdir='${docdir}'
+psdir='${docdir}'
+libdir='${exec_prefix}/lib'
+localedir='${datarootdir}/locale'
+mandir='${datarootdir}/man'
+
+ac_prev=
+ac_dashdash=
+for ac_option
+do
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval $ac_prev=\$ac_option
+    ac_prev=
+    continue
+  fi
+
+  case $ac_option in
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
+  esac
+
+  case $ac_dashdash$ac_option in
+  --)
+    ac_dashdash=yes ;;
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir=$ac_optarg ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build_alias ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build_alias=$ac_optarg ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file=$ac_optarg ;;
+
+  --config-cache | -C)
+    cache_file=config.cache ;;
+
+  -datadir | --datadir | --datadi | --datad)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=*)
+    datadir=$ac_optarg ;;
+
+  -datarootdir | --datarootdir | --datarootdi | --datarootd | --dataroot \
+  | --dataroo | --dataro | --datar)
+    ac_prev=datarootdir ;;
+  -datarootdir=* | --datarootdir=* | --datarootdi=* | --datarootd=* \
+  | --dataroot=* | --dataroo=* | --dataro=* | --datar=*)
+    datarootdir=$ac_optarg ;;
+
+  -disable-* | --disable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--disable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=no ;;
+
+  -docdir | --docdir | --docdi | --doc | --do)
+    ac_prev=docdir ;;
+  -docdir=* | --docdir=* | --docdi=* | --doc=* | --do=*)
+    docdir=$ac_optarg ;;
+
+  -dvidir | --dvidir | --dvidi | --dvid | --dvi | --dv)
+    ac_prev=dvidir ;;
+  -dvidir=* | --dvidir=* | --dvidi=* | --dvid=* | --dvi=* | --dv=*)
+    dvidir=$ac_optarg ;;
+
+  -enable-* | --enable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--enable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=\$ac_optarg ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix=$ac_optarg ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he | -h)
+    ac_init_help=long ;;
+  -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
+    ac_init_help=recursive ;;
+  -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
+    ac_init_help=short ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host_alias ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host_alias=$ac_optarg ;;
+
+  -htmldir | --htmldir | --htmldi | --htmld | --html | --htm | --ht)
+    ac_prev=htmldir ;;
+  -htmldir=* | --htmldir=* | --htmldi=* | --htmld=* | --html=* | --htm=* \
+  | --ht=*)
+    htmldir=$ac_optarg ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir=$ac_optarg ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir=$ac_optarg ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir=$ac_optarg ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir=$ac_optarg ;;
+
+  -localedir | --localedir | --localedi | --localed | --locale)
+    ac_prev=localedir ;;
+  -localedir=* | --localedir=* | --localedi=* | --localed=* | --locale=*)
+    localedir=$ac_optarg ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst | --locals)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* | --locals=*)
+    localstatedir=$ac_optarg ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir=$ac_optarg ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c | -n)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
+    ac_prev=pdfdir ;;
+  -pdfdir=* | --pdfdir=* | --pdfdi=* | --pdfd=* | --pdf=* | --pd=*)
+    pdfdir=$ac_optarg ;;
+
+  -psdir | --psdir | --psdi | --psd | --ps)
+    ac_prev=psdir ;;
+  -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
+    psdir=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--with-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=\$ac_optarg ;;
+
+  -without-* | --without-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=no ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    case $ac_envvar in #(
+      '' | [0-9]* | *[!_$as_cr_alnum]* )
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+    esac
+    eval $ac_envvar=\$ac_optarg
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    printf "%s\n" "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      printf "%s\n" "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  as_fn_error $? "missing argument to $ac_option"
+fi
+
+if test -n "$ac_unrecognized_opts"; then
+  case $enable_option_checking in
+    no) ;;
+    fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
+    *)     printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+  esac
+fi
+
+# Check all directory arguments for consistency.
+for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
+		datadir sysconfdir sharedstatedir localstatedir includedir \
+		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
+		libdir localedir mandir runstatedir
+do
+  eval ac_val=\$$ac_var
+  # Remove trailing slashes.
+  case $ac_val in
+    */ )
+      ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
+      eval $ac_var=\$ac_val;;
+  esac
+  # Be sure to have absolute directory names.
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* )  continue;;
+    NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
+  esac
+  as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+ac_pwd=`pwd` && test -n "$ac_pwd" &&
+ac_ls_di=`ls -di .` &&
+ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
+  as_fn_error $? "working directory cannot be determined"
+test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
+  as_fn_error $? "pwd does not report name of working directory"
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then the parent directory.
+  ac_confdir=`$as_dirname -- "$as_myself" ||
+$as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_myself" : 'X\(//\)[^/]' \| \
+	 X"$as_myself" : 'X\(//\)$' \| \
+	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_myself" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r "$srcdir/$ac_unique_file"; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r "$srcdir/$ac_unique_file"; then
+  test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
+  as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
+fi
+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_abs_confdir=`(
+	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
+	pwd)`
+# When building in place, set srcdir=.
+if test "$ac_abs_confdir" = "$ac_pwd"; then
+  srcdir=.
+fi
+# Remove unnecessary trailing slashes from srcdir.
+# Double slashes in file names in object file debugging info
+# mess up M-x gdb in Emacs.
+case $srcdir in
+*/) srcdir=`expr "X$srcdir" : 'X\(.*[^/]\)' \| "X$srcdir" : 'X\(.*\)'`;;
+esac
+for ac_var in $ac_precious_vars; do
+  eval ac_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_env_${ac_var}_value=\$${ac_var}
+  eval ac_cv_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_cv_env_${ac_var}_value=\$${ac_var}
+done
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures dag_scrubber 0.5 to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking ...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR            user executables [EPREFIX/bin]
+  --sbindir=DIR           system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR        program executables [EPREFIX/libexec]
+  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
+  --libdir=DIR            object code libraries [EPREFIX/lib]
+  --includedir=DIR        C header files [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
+  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
+  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
+  --infodir=DIR           info documentation [DATAROOTDIR/info]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
+  --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/dag_scrubber]
+  --htmldir=DIR           html documentation [DOCDIR]
+  --dvidir=DIR            dvi documentation [DOCDIR]
+  --pdfdir=DIR            pdf documentation [DOCDIR]
+  --psdir=DIR             ps documentation [DOCDIR]
+_ACEOF
+
+  cat <<\_ACEOF
+
+Program names:
+  --program-prefix=PREFIX            prepend PREFIX to installed program names
+  --program-suffix=SUFFIX            append SUFFIX to installed program names
+  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+  case $ac_init_help in
+     short | recursive ) echo "Configuration of dag_scrubber 0.5:";;
+   esac
+  cat <<\_ACEOF
+
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-silent-rules   less verbose build output (undo: "make V=1")
+  --disable-silent-rules  verbose build output (undo: "make V=0")
+  --enable-dependency-tracking
+                          do not reject slow dependency extractors
+  --disable-dependency-tracking
+                          speeds up one-time build
+
+Some influential environment variables:
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  LIBS        libraries to pass to the linker, e.g. -l<library>
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
+              you have headers in a nonstandard directory <include dir>
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+Report bugs to <yuri@isi.edu>.
+_ACEOF
+ac_status=$?
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d "$ac_dir" ||
+      { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
+      continue
+    ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+    cd "$ac_dir" || { ac_status=$?; continue; }
+    # Check for configure.gnu first; this name is used for a wrapper for
+    # Metaconfig's "Configure" on case-insensitive file systems.
+    if test -f "$ac_srcdir/configure.gnu"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure.gnu" --help=recursive
+    elif test -f "$ac_srcdir/configure"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure" --help=recursive
+    else
+      printf "%s\n" "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi || ac_status=$?
+    cd "$ac_pwd" || { ac_status=$?; break; }
+  done
+fi
+
+test -n "$ac_init_help" && exit $ac_status
+if $ac_init_version; then
+  cat <<\_ACEOF
+dag_scrubber configure 0.5
+generated by GNU Autoconf 2.71
+
+Copyright (C) 2021 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit
+fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest.beam
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest.beam conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
+       }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  eval "$3=yes"
+else $as_nop
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_header_compile
+ac_configure_args_raw=
+for ac_arg
+do
+  case $ac_arg in
+  *\'*)
+    ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+  esac
+  as_fn_append ac_configure_args_raw " '$ac_arg'"
+done
+
+case $ac_configure_args_raw in
+  *$as_nl*)
+    ac_safe_unquote= ;;
+  *)
+    ac_unsafe_z='|&;<>()$`\\"*?[ ''	' # This string ends in space, tab.
+    ac_unsafe_a="$ac_unsafe_z#~"
+    ac_safe_unquote="s/ '\\([^$ac_unsafe_a][^$ac_unsafe_z]*\\)'/ \\1/g"
+    ac_configure_args_raw=`      printf "%s\n" "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
+esac
+
+cat >config.log <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by dag_scrubber $as_me 0.5, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
+
+  $ $0$ac_configure_args_raw
+
+_ACEOF
+exec 5>>config.log
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+/usr/bin/hostinfo      = `(/usr/bin/hostinfo) 2>/dev/null      || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    printf "%s\n" "PATH: $as_dir"
+  done
+IFS=$as_save_IFS
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *\'*)
+      ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
+    2)
+      as_fn_append ac_configure_args1 " '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+	ac_must_keep_next=false # Got value, back to normal.
+      else
+	case $ac_arg in
+	  *=* | --config-cache | -C | -disable-* | --disable-* \
+	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+	  | -with-* | --with-* | -without-* | --without-* | --x)
+	    case "$ac_configure_args0 " in
+	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+	    esac
+	    ;;
+	  -* ) ac_must_keep_next=true ;;
+	esac
+      fi
+      as_fn_append ac_configure_args " '$ac_arg'"
+      ;;
+    esac
+  done
+done
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Use '\'' to represent an apostrophe within the trap.
+# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
+trap 'exit_status=$?
+  # Sanitize IFS.
+  IFS=" ""	$as_nl"
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    printf "%s\n" "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+(
+  for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+  (set) 2>&1 |
+    case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      sed -n \
+	"s/'\''/'\''\\\\'\'''\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+      ;; #(
+    *)
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+)
+    echo
+
+    printf "%s\n" "## ----------------- ##
+## Output variables. ##
+## ----------------- ##"
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=\$$ac_var
+      case $ac_val in
+      *\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      esac
+      printf "%s\n" "$ac_var='\''$ac_val'\''"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      printf "%s\n" "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=\$$ac_var
+	case $ac_val in
+	*\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+	esac
+	printf "%s\n" "$ac_var='\''$ac_val'\''"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      printf "%s\n" "## ----------- ##
+## confdefs.h. ##
+## ----------- ##"
+      echo
+      cat confdefs.h
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      printf "%s\n" "$as_me: caught signal $ac_signal"
+    printf "%s\n" "$as_me: exit $exit_status"
+  } >&5
+  rm -f core *.core core.conftest.* &&
+    rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -f -r conftest* confdefs.h
+
+printf "%s\n" "/* confdefs.h */" > confdefs.h
+
+# Predefined preprocessor variables.
+
+printf "%s\n" "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
+
+printf "%s\n" "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer an explicitly selected file to automatically selected ones.
+if test -n "$CONFIG_SITE"; then
+  ac_site_files="$CONFIG_SITE"
+elif test "x$prefix" != xNONE; then
+  ac_site_files="$prefix/share/config.site $prefix/etc/config.site"
+else
+  ac_site_files="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+fi
+
+for ac_site_file in $ac_site_files
+do
+  case $ac_site_file in #(
+  */*) :
+     ;; #(
+  *) :
+    ac_site_file=./$ac_site_file ;;
+esac
+  if test -f "$ac_site_file" && test -r "$ac_site_file"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file" \
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+printf "%s\n" "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . "$cache_file";;
+      *)                      . "./$cache_file";;
+    esac
+  fi
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+printf "%s\n" "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+# Test code for whether the C compiler supports C89 (global declarations)
+ac_c_conftest_c89_globals='
+/* Does the compiler advertise C89 conformance?
+   Do not test the value of __STDC__, because some compilers set it to 0
+   while being otherwise adequately conformant. */
+#if !defined __STDC__
+# error "Compiler does not advertise C89 conformance"
+#endif
+
+#include <stddef.h>
+#include <stdarg.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
+struct buf { int x; };
+struct buf * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not \xHH hex character constants.
+   These do not provoke an error unfortunately, instead are silently treated
+   as an "x".  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously \x00 != x always comes out true, for an
+   array size at least.  It is necessary to write \x00 == 0 to get something
+   that is true only with -std.  */
+int osf4_cc_array ['\''\x00'\'' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) '\''x'\''
+int xlc6_cc_array[FOO(a) == '\''x'\'' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, int *(*)(struct buf *, struct stat *, int),
+               int, int);'
+
+# Test code for whether the C compiler supports C89 (body of main).
+ac_c_conftest_c89_main='
+ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
+'
+
+# Test code for whether the C compiler supports C99 (global declarations)
+ac_c_conftest_c99_globals='
+// Does the compiler advertise C99 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
+# error "Compiler does not advertise C99 conformance"
+#endif
+
+#include <stdbool.h>
+extern int puts (const char *);
+extern int printf (const char *, ...);
+extern int dprintf (int, const char *, ...);
+extern void *malloc (size_t);
+
+// Check varargs macros.  These examples are taken from C99 6.10.3.5.
+// dprintf is used instead of fprintf to avoid needing to declare
+// FILE and stderr.
+#define debug(...) dprintf (2, __VA_ARGS__)
+#define showlist(...) puts (#__VA_ARGS__)
+#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
+static void
+test_varargs_macros (void)
+{
+  int x = 1234;
+  int y = 5678;
+  debug ("Flag");
+  debug ("X = %d\n", x);
+  showlist (The first, second, and third items.);
+  report (x>y, "x is %d but y is %d", x, y);
+}
+
+// Check long long types.
+#define BIG64 18446744073709551615ull
+#define BIG32 4294967295ul
+#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
+#if !BIG_OK
+  #error "your preprocessor is broken"
+#endif
+#if BIG_OK
+#else
+  #error "your preprocessor is broken"
+#endif
+static long long int bignum = -9223372036854775807LL;
+static unsigned long long int ubignum = BIG64;
+
+struct incomplete_array
+{
+  int datasize;
+  double data[];
+};
+
+struct named_init {
+  int number;
+  const wchar_t *name;
+  double average;
+};
+
+typedef const char *ccp;
+
+static inline int
+test_restrict (ccp restrict text)
+{
+  // See if C++-style comments work.
+  // Iterate through items via the restricted pointer.
+  // Also check for declarations in for loops.
+  for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
+    continue;
+  return 0;
+}
+
+// Check varargs and va_copy.
+static bool
+test_varargs (const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  va_list args_copy;
+  va_copy (args_copy, args);
+
+  const char *str = "";
+  int number = 0;
+  float fnumber = 0;
+
+  while (*format)
+    {
+      switch (*format++)
+	{
+	case '\''s'\'': // string
+	  str = va_arg (args_copy, const char *);
+	  break;
+	case '\''d'\'': // int
+	  number = va_arg (args_copy, int);
+	  break;
+	case '\''f'\'': // float
+	  fnumber = va_arg (args_copy, double);
+	  break;
+	default:
+	  break;
+	}
+    }
+  va_end (args_copy);
+  va_end (args);
+
+  return *str && number && fnumber;
+}
+'
+
+# Test code for whether the C compiler supports C99 (body of main).
+ac_c_conftest_c99_main='
+  // Check bool.
+  _Bool success = false;
+  success |= (argc != 0);
+
+  // Check restrict.
+  if (test_restrict ("String literal") == 0)
+    success = true;
+  char *restrict newvar = "Another string";
+
+  // Check varargs.
+  success &= test_varargs ("s, d'\'' f .", "string", 65, 34.234);
+  test_varargs_macros ();
+
+  // Check flexible array members.
+  struct incomplete_array *ia =
+    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
+  ia->datasize = 10;
+  for (int i = 0; i < ia->datasize; ++i)
+    ia->data[i] = i * 1.234;
+
+  // Check named initializers.
+  struct named_init ni = {
+    .number = 34,
+    .name = L"Test wide string",
+    .average = 543.34343,
+  };
+
+  ni.number = 58;
+
+  int dynamic_array[ni.number];
+  dynamic_array[0] = argv[0][0];
+  dynamic_array[ni.number - 1] = 543;
+
+  // work around unused variable warnings
+  ok |= (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == '\''x'\''
+	 || dynamic_array[ni.number - 1] != 543);
+'
+
+# Test code for whether the C compiler supports C11 (global declarations)
+ac_c_conftest_c11_globals='
+// Does the compiler advertise C11 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
+# error "Compiler does not advertise C11 conformance"
+#endif
+
+// Check _Alignas.
+char _Alignas (double) aligned_as_double;
+char _Alignas (0) no_special_alignment;
+extern char aligned_as_int;
+char _Alignas (0) _Alignas (int) aligned_as_int;
+
+// Check _Alignof.
+enum
+{
+  int_alignment = _Alignof (int),
+  int_array_alignment = _Alignof (int[100]),
+  char_alignment = _Alignof (char)
+};
+_Static_assert (0 < -_Alignof (int), "_Alignof is signed");
+
+// Check _Noreturn.
+int _Noreturn does_not_return (void) { for (;;) continue; }
+
+// Check _Static_assert.
+struct test_static_assert
+{
+  int x;
+  _Static_assert (sizeof (int) <= sizeof (long int),
+                  "_Static_assert does not work in struct");
+  long int y;
+};
+
+// Check UTF-8 literals.
+#define u8 syntax error!
+char const utf8_literal[] = u8"happens to be ASCII" "another string";
+
+// Check duplicate typedefs.
+typedef long *long_ptr;
+typedef long int *long_ptr;
+typedef long_ptr long_ptr;
+
+// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
+struct anonymous
+{
+  union {
+    struct { int i; int j; };
+    struct { int k; long int l; } w;
+  };
+  int m;
+} v1;
+'
+
+# Test code for whether the C compiler supports C11 (body of main).
+ac_c_conftest_c11_main='
+  _Static_assert ((offsetof (struct anonymous, i)
+		   == offsetof (struct anonymous, w.k)),
+		  "Anonymous union alignment botch");
+  v1.i = 2;
+  v1.w.k = 5;
+  ok |= v1.i != 5;
+'
+
+# Test code for whether the C compiler supports C11 (complete).
+ac_c_conftest_c11_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+${ac_c_conftest_c11_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  ${ac_c_conftest_c11_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C99 (complete).
+ac_c_conftest_c99_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C89 (complete).
+ac_c_conftest_c89_program="${ac_c_conftest_c89_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  return ok;
+}
+"
+
+as_fn_append ac_header_c_list " stdio.h stdio_h HAVE_STDIO_H"
+as_fn_append ac_header_c_list " stdlib.h stdlib_h HAVE_STDLIB_H"
+as_fn_append ac_header_c_list " string.h string_h HAVE_STRING_H"
+as_fn_append ac_header_c_list " inttypes.h inttypes_h HAVE_INTTYPES_H"
+as_fn_append ac_header_c_list " stdint.h stdint_h HAVE_STDINT_H"
+as_fn_append ac_header_c_list " strings.h strings_h HAVE_STRINGS_H"
+as_fn_append ac_header_c_list " sys/stat.h sys_stat_h HAVE_SYS_STAT_H"
+as_fn_append ac_header_c_list " sys/types.h sys_types_h HAVE_SYS_TYPES_H"
+as_fn_append ac_header_c_list " unistd.h unistd_h HAVE_UNISTD_H"
+
+# Auxiliary files required by this configure script.
+ac_aux_files="compile missing install-sh"
+
+# Locations in which to look for auxiliary files.
+ac_aux_dir_candidates="${srcdir}/.build-aux"
+
+# Search for a directory containing all of the required auxiliary files,
+# $ac_aux_files, from the $PATH-style list $ac_aux_dir_candidates.
+# If we don't find one directory that contains all the files we need,
+# we report the set of missing files from the *first* directory in
+# $ac_aux_dir_candidates and give up.
+ac_missing_aux_files=""
+ac_first_candidate=:
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in $ac_aux_dir_candidates
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+  as_found=:
+
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
+  ac_aux_dir_found=yes
+  ac_install_sh=
+  for ac_aux in $ac_aux_files
+  do
+    # As a special case, if "install-sh" is required, that requirement
+    # can be satisfied by any of "install-sh", "install.sh", or "shtool",
+    # and $ac_install_sh is set appropriately for whichever one is found.
+    if test x"$ac_aux" = x"install-sh"
+    then
+      if test -f "${as_dir}install-sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
+        ac_install_sh="${as_dir}install-sh -c"
+      elif test -f "${as_dir}install.sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
+        ac_install_sh="${as_dir}install.sh -c"
+      elif test -f "${as_dir}shtool"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
+        ac_install_sh="${as_dir}shtool install -c"
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} install-sh"
+        else
+          break
+        fi
+      fi
+    else
+      if test -f "${as_dir}${ac_aux}"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} ${ac_aux}"
+        else
+          break
+        fi
+      fi
+    fi
+  done
+  if test "$ac_aux_dir_found" = yes; then
+    ac_aux_dir="$as_dir"
+    break
+  fi
+  ac_first_candidate=false
+
+  as_found=false
+done
+IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  as_fn_error $? "cannot find required auxiliary files:$ac_missing_aux_files" "$LINENO" 5
+fi
+
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+if test -f "${ac_aux_dir}config.guess"; then
+  ac_config_guess="$SHELL ${ac_aux_dir}config.guess"
+fi
+if test -f "${ac_aux_dir}config.sub"; then
+  ac_config_sub="$SHELL ${ac_aux_dir}config.sub"
+fi
+if test -f "$ac_aux_dir/configure"; then
+  ac_configure="$SHELL ${ac_aux_dir}configure"
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in $ac_precious_vars; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val=\$ac_cv_env_${ac_var}_value
+  eval ac_new_val=\$ac_env_${ac_var}_value
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+	# differences in whitespace do not lead to failure.
+	ac_old_val_w=`echo x $ac_old_val`
+	ac_new_val_w=`echo x $ac_new_val`
+	if test "$ac_old_val_w" != "$ac_new_val_w"; then
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  ac_cache_corrupted=:
+	else
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  eval $ac_var=\$ac_old_val
+	fi
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *\'*) ac_arg=$ac_var=`printf "%s\n" "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) as_fn_append ac_configure_args " '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
+  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
+	    and start over" "$LINENO" 5
+fi
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+RELEASE=${RELEASE:-2}
+
+
+
+am__api_version='1.16'
+
+
+
+  # Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+printf %s "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if test ${ac_cv_path_install+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    # Account for fact that we put trailing slashes in our PATH walk.
+case $as_dir in #((
+  ./ | /[cC]/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext"; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir/" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+  done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+  if test ${ac_cv_path_install+y}; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+printf "%s\n" "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
+printf %s "checking whether build environment is sane... " >&6; }
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[\\\"\#\$\&\'\`$am_lf]*)
+    as_fn_error $? "unsafe absolute working directory name" "$LINENO" 5;;
+esac
+case $srcdir in
+  *[\\\"\#\$\&\'\`$am_lf\ \	]*)
+    as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;;
+esac
+
+# Do 'set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$*" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$*" != "X $srcdir/configure conftest.file" \
+	&& test "$*" != "X conftest.file $srcdir/configure"; then
+
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment" "$LINENO" 5
+     fi
+     if test "$2" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
+   test "$2" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   as_fn_error $? "newly created file is older than distributed files!
+Check your system clock" "$LINENO" 5
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+
+rm -f conftest.file
+
+test "$program_prefix" != NONE &&
+  program_transform_name="s&^&$program_prefix&;$program_transform_name"
+# Use a double $ so make ignores it.
+test "$program_suffix" != NONE &&
+  program_transform_name="s&\$&$program_suffix&;$program_transform_name"
+# Double any \ or $.
+# By default was `s,x,x', remove it if useless.
+ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
+program_transform_name=`printf "%s\n" "$program_transform_name" | sed "$ac_script"`
+
+
+# Expand $ac_aux_dir to an absolute path.
+am_aux_dir=`cd "$ac_aux_dir" && pwd`
+
+
+  if test x"${MISSING+set}" != xset; then
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
+fi
+# Use eval to expand $SHELL
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
+else
+  am_missing_run=
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
+printf "%s\n" "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
+fi
+
+if test x"${install_sh+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the 'STRIP' environment variable to overrule this program.
+if test "$cross_compiling" != no; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf "%s\n" "$STRIP" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf "%s\n" "$ac_ct_STRIP" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a race-free mkdir -p" >&5
+printf %s "checking for a race-free mkdir -p... " >&6; }
+if test -z "$MKDIR_P"; then
+  if test ${ac_cv_path_mkdir+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in mkdir gmkdir; do
+	 for ac_exec_ext in '' $ac_executable_extensions; do
+	   as_fn_executable_p "$as_dir$ac_prog$ac_exec_ext" || continue
+	   case `"$as_dir$ac_prog$ac_exec_ext" --version 2>&1` in #(
+	     'mkdir ('*'coreutils) '* | \
+	     'BusyBox '* | \
+	     'mkdir (fileutils) '4.1*)
+	       ac_cv_path_mkdir=$as_dir$ac_prog$ac_exec_ext
+	       break 3;;
+	   esac
+	 done
+       done
+  done
+IFS=$as_save_IFS
+
+fi
+
+  test -d ./--version && rmdir ./--version
+  if test ${ac_cv_path_mkdir+y}; then
+    MKDIR_P="$ac_cv_path_mkdir -p"
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for MKDIR_P within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    MKDIR_P="$ac_install_sh -d"
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
+printf "%s\n" "$MKDIR_P" >&6; }
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AWK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf "%s\n" "$AWK" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+printf %s "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
+set x ${MAKE-make}
+ac_make=`printf "%s\n" "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+if eval test \${ac_cv_prog_make_${ac_make}_set+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat >conftest.make <<\_ACEOF
+SHELL = /bin/sh
+all:
+	@echo '@@@%%%=$(MAKE)=@@@%%%'
+_ACEOF
+# GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+case `${MAKE-make} -f conftest.make 2>/dev/null` in
+  *@@@%%%=?*=@@@%%%*)
+    eval ac_cv_prog_make_${ac_make}_set=yes;;
+  *)
+    eval ac_cv_prog_make_${ac_make}_set=no;;
+esac
+rm -f conftest.make
+fi
+if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+  SET_MAKE=
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+
+# Check whether --enable-silent-rules was given.
+if test ${enable_silent_rules+y}
+then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in # (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=1;;
+esac
+am_make=${MAKE-make}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+printf %s "checking whether $am_make supports nested variables... " >&6; }
+if test ${am_cv_make_support_nested_variables+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if printf "%s\n" 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+printf "%s\n" "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'
+
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  am__isrc=' -I$(srcdir)'
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    as_fn_error $? "source directory already configured; run \"make distclean\" there first" "$LINENO" 5
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+
+
+# Define the identity of the package.
+ PACKAGE='dag_scrubber'
+ VERSION='0.5'
+
+
+printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
+
+
+printf "%s\n" "#define VERSION \"$VERSION\"" >>confdefs.h
+
+# Some tools Automake needs.
+
+ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"}
+
+
+AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"}
+
+
+AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"}
+
+
+AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"}
+
+
+MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
+
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+mkdir_p='$(MKDIR_P)'
+
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
+# Always define AMTAR for backward compatibility.  Yes, it's still used
+# in the wild :-(  We should find a proper way to deprecate it ...
+AMTAR='$${TAR-tar}'
+
+
+# We'll loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar  pax cpio none'
+
+am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
+
+
+
+
+
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+
+
+
+# POSIX will say in a future version that running "rm -f" with no argument
+# is OK; and we want to be able to make that assumption in our Makefile
+# recipes.  So use an aggressive probe to check that the usage we want is
+# actually supported "in the wild" to an acceptable degree.
+# See automake bug#10828.
+# To make any issue more visible, cause the running configure to be aborted
+# by default if the 'rm' program in use doesn't match our expectations; the
+# user can still override this though.
+if rm -f && rm -fr && rm -rf; then : OK; else
+  cat >&2 <<'END'
+Oops!
+
+Your 'rm' program seems unable to run without file operands specified
+on the command line, even when the '-f' option is present.  This is contrary
+to the behaviour of most rm programs out there, and not conforming with
+the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
+
+Please tell bug-automake@gnu.org about your system, including the value
+of your $PATH and any error possibly output before this message.  This
+can help us improve future automake versions.
+
+END
+  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
+    echo 'Configuration will proceed anyway, since you have set the' >&2
+    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
+    echo >&2
+  else
+    cat >&2 <<'END'
+Aborting the configuration process, to ensure you take notice of the issue.
+
+You can download and install GNU coreutils to get an 'rm' implementation
+that behaves properly: <https://www.gnu.org/software/coreutils/>.
+
+If you want to complete the configuration process using your problematic
+'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
+to "yes", and re-run configure.
+
+END
+    as_fn_error $? "Your 'rm' program is bad, sorry." "$LINENO" 5
+  fi
+fi
+
+
+ac_config_headers="$ac_config_headers config.h"
+
+
+#checks for programs
+
+
+
+
+
+
+
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    if test "$as_dir$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
+set dummy ${ac_tool_prefix}clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "clang", so it can be a program name with args.
+set dummy clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+
+
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5; }
+
+# Provide some information about the compiler.
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion -version; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+printf %s "checking whether the C compiler works... " >&6; }
+ac_link_default=`printf "%s\n" "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+
+# The possible output files:
+ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
+
+ac_rmfiles=
+for ac_file in $ac_files
+do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    * ) ac_rmfiles="$ac_rmfiles $ac_file";;
+  esac
+done
+rm -f $ac_rmfiles
+
+if { { ac_try="$ac_link_default"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link_default") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+# in a Makefile.  We should not override ac_cv_exeext if it was cached,
+# so that the user can short-circuit this test for compilers unknown to
+# Autoconf.
+for ac_file in $ac_files ''
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
+	;;
+    [ab].out )
+	# We found the default executable, but exeext='' is most
+	# certainly right.
+	break;;
+    *.* )
+	if test ${ac_cv_exeext+y} && test "$ac_cv_exeext" != no;
+	then :; else
+	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	fi
+	# We set ac_cv_exeext here because the later test for it is not
+	# safe: cross compilers may not add the suffix if given an `-o'
+	# argument, so we may need to know it at that point already.
+	# Even if this section looks crufty: it has the advantage of
+	# actually working.
+	break;;
+    * )
+	break;;
+  esac
+done
+test "$ac_cv_exeext" = no && ac_cv_exeext=
+
+else $as_nop
+  ac_file=''
+fi
+if test -z "$ac_file"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+printf %s "checking for C compiler default output file name... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+printf "%s\n" "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
+
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+printf %s "checking for suffix of executables... " >&6; }
+if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	  break;;
+    * ) break;;
+  esac
+done
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest conftest$ac_cv_exeext
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+printf "%s\n" "$ac_cv_exeext" >&6; }
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main (void)
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+printf %s "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5; }
+    fi
+  fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+printf "%s\n" "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+printf %s "checking for suffix of object files... " >&6; }
+if test ${ac_cv_objext+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
+  for ac_file in conftest.o conftest.obj conftest.*; do
+  test -f "$ac_file" || continue;
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+printf "%s\n" "$ac_cv_objext" >&6; }
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+printf %s "checking whether the compiler supports GNU C... " >&6; }
+if test ${ac_cv_c_compiler_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_compiler_gnu=yes
+else $as_nop
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+y}
+ac_save_CFLAGS=$CFLAGS
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+printf %s "checking whether $CC accepts -g... " >&6; }
+if test ${ac_cv_prog_cc_g+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+else $as_nop
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+if test $ac_test_CFLAGS; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+ac_prog_cc_stdc=no
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+printf %s "checking for $CC option to enable C11 features... " >&6; }
+if test ${ac_cv_prog_cc_c11+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c11=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c11_program
+_ACEOF
+for ac_arg in '' -std=gnu11
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c11=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c11" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c11" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c11" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+     CC="$CC $ac_cv_prog_cc_c11"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
+  ac_prog_cc_stdc=c11
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+printf %s "checking for $CC option to enable C99 features... " >&6; }
+if test ${ac_cv_prog_cc_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c99=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c99_program
+_ACEOF
+for ac_arg in '' -std=gnu99 -std=c99 -c99 -qlanglvl=extc1x -qlanglvl=extc99 -AC99 -D_STDC_C99=
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c99=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c99" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c99" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c99" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+     CC="$CC $ac_cv_prog_cc_c99"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
+  ac_prog_cc_stdc=c99
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+printf %s "checking for $CC option to enable C89 features... " >&6; }
+if test ${ac_cv_prog_cc_c89+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c89_program
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c89" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c89" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+     CC="$CC $ac_cv_prog_cc_c89"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
+  ac_prog_cc_stdc=c89
+fi
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
+printf %s "checking whether $CC understands -c and -o together... " >&6; }
+if test ${am_cv_prog_cc_c_o+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+  # Make sure it works both with $CC and with simple cc.
+  # Following AC_PROG_CC_C_O, we do the test twice because some
+  # compilers refuse to overwrite an existing .o file with -o,
+  # though they will create one.
+  am_cv_prog_cc_c_o=yes
+  for am_i in 1 2; do
+    if { echo "$as_me:$LINENO: $CC -c conftest.$ac_ext -o conftest2.$ac_objext" >&5
+   ($CC -c conftest.$ac_ext -o conftest2.$ac_objext) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } \
+         && test -f conftest2.$ac_objext; then
+      : OK
+    else
+      am_cv_prog_cc_c_o=no
+      break
+    fi
+  done
+  rm -f core conftest*
+  unset am_i
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
+printf "%s\n" "$am_cv_prog_cc_c_o" >&6; }
+if test "$am_cv_prog_cc_c_o" != yes; then
+   # Losing compiler, so override with the script.
+   # FIXME: It is wrong to rewrite CC.
+   # But if we don't then we get into trouble of one sort or another.
+   # A longer-term fix would be to have automake use am__CC in this case,
+   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
+   CC="$am_aux_dir/compile $CC"
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+DEPDIR="${am__leading_dot}deps"
+
+ac_config_commands="$ac_config_commands depfiles"
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
+printf %s "checking whether ${MAKE-make} supports the include directive... " >&6; }
+cat > confinc.mk << 'END'
+am__doit:
+	@echo this is the am__doit target >confinc.out
+.PHONY: am__doit
+END
+am__include="#"
+am__quote=
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  { echo "$as_me:$LINENO: ${MAKE-make} -f confmf.$s && cat confinc.out" >&5
+   (${MAKE-make} -f confmf.$s && cat confinc.out) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); }
+  case $?:`cat confinc.out 2>/dev/null` in #(
+  '0:this is the am__doit target') :
+    case $s in #(
+  BSD) :
+    am__include='.include' am__quote='"' ;; #(
+  *) :
+    am__include='include' am__quote='' ;;
+esac ;; #(
+  *) :
+     ;;
+esac
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
+printf "%s\n" "${_am_result}" >&6; }
+
+# Check whether --enable-dependency-tracking was given.
+if test ${enable_dependency_tracking+y}
+then :
+  enableval=$enable_dependency_tracking;
+fi
+
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+  am__nodep='_no'
+fi
+ if test "x$enable_dependency_tracking" != xno; then
+  AMDEP_TRUE=
+  AMDEP_FALSE='#'
+else
+  AMDEP_TRUE='#'
+  AMDEP_FALSE=
+fi
+
+
+
+depcc="$CC"   am_compiler_list=
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+printf %s "checking dependency style of $depcc... " >&6; }
+if test ${am_cv_CC_dependencies_compiler_type+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CC_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
+      # This compiler won't grok '-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CC_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CC_dependencies_compiler_type=none
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+printf "%s\n" "$am_cv_CC_dependencies_compiler_type" >&6; }
+CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
+  am__fastdepCC_TRUE=
+  am__fastdepCC_FALSE='#'
+else
+  am__fastdepCC_TRUE='#'
+  am__fastdepCC_FALSE=
+fi
+
+
+
+#AC_PROG_MKDIR_P
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+printf %s "checking whether ln -s works... " >&6; }
+LN_S=$as_ln_s
+if test "$LN_S" = "ln -s"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+printf "%s\n" "no, using $LN_S" >&6; }
+fi
+
+#AC_PROG_SED
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AWK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf "%s\n" "$AWK" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+
+
+#check for libraries
+found_pcap=
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pcap_open_offline in -lpcap" >&5
+printf %s "checking for pcap_open_offline in -lpcap... " >&6; }
+if test ${ac_cv_lib_pcap_pcap_open_offline+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpcap  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char pcap_open_offline ();
+int
+main (void)
+{
+return pcap_open_offline ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_pcap_pcap_open_offline=yes
+else $as_nop
+  ac_cv_lib_pcap_pcap_open_offline=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pcap_pcap_open_offline" >&5
+printf "%s\n" "$ac_cv_lib_pcap_pcap_open_offline" >&6; }
+if test "x$ac_cv_lib_pcap_pcap_open_offline" = xyes
+then :
+  #restore libs
+	      LIBS=$ac_check_lib_save_LIBS
+	      found_pcap=yes
+
+fi
+
+found_ssl=
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BF_ecb_encrypt in -lcrypto" >&5
+printf %s "checking for BF_ecb_encrypt in -lcrypto... " >&6; }
+if test ${ac_cv_lib_crypto_BF_ecb_encrypt+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lcrypto  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char BF_ecb_encrypt ();
+int
+main (void)
+{
+return BF_ecb_encrypt ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_crypto_BF_ecb_encrypt=yes
+else $as_nop
+  ac_cv_lib_crypto_BF_ecb_encrypt=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_crypto_BF_ecb_encrypt" >&5
+printf "%s\n" "$ac_cv_lib_crypto_BF_ecb_encrypt" >&6; }
+if test "x$ac_cv_lib_crypto_BF_ecb_encrypt" = xyes
+then :
+  #restore libs
+	      LIBS=$ac_check_lib_save_LIBS
+	      found_ssl=yes
+
+fi
+
+#check for headers
+if test -n "$found_ssl"; then
+	ac_header= ac_cache=
+for ac_item in $ac_header_c_list
+do
+  if test $ac_cache; then
+    ac_fn_c_check_header_compile "$LINENO" $ac_header ac_cv_header_$ac_cache "$ac_includes_default"
+    if eval test \"x\$ac_cv_header_$ac_cache\" = xyes; then
+      printf "%s\n" "#define $ac_item 1" >> confdefs.h
+    fi
+    ac_header= ac_cache=
+  elif test $ac_header; then
+    ac_cache=$ac_item
+  else
+    ac_header=$ac_item
+  fi
+done
+
+
+
+
+
+
+
+
+if test $ac_cv_header_stdlib_h = yes && test $ac_cv_header_string_h = yes
+then :
+
+printf "%s\n" "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/md5.h" "ac_cv_header_openssl_md5_h" "$ac_includes_default"
+if test "x$ac_cv_header_openssl_md5_h" = xyes
+then :
+
+else $as_nop
+  found_ssl=
+fi
+
+fi
+if test -n "$found_ssl"; then
+	ac_fn_c_check_header_compile "$LINENO" "openssl/blowfish.h" "ac_cv_header_openssl_blowfish_h" "$ac_includes_default"
+if test "x$ac_cv_header_openssl_blowfish_h" = xyes
+then :
+
+else $as_nop
+  found_ssl=
+fi
+
+fi
+if test -n "$found_ssl"; then
+    	ac_fn_c_check_header_compile "$LINENO" "openssl/sha.h" "ac_cv_header_openssl_sha_h" "$ac_includes_default"
+if test "x$ac_cv_header_openssl_sha_h" = xyes
+then :
+
+else $as_nop
+  found_ssl=
+fi
+
+fi
+if test -n "$found_pcap"; then
+    	ac_fn_c_check_header_compile "$LINENO" "pcap.h" "ac_cv_header_pcap_h" "$ac_includes_default"
+if test "x$ac_cv_header_pcap_h" = xyes
+then :
+
+else $as_nop
+  found_pcap=
+fi
+
+fi
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+
+  (set) 2>&1 |
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;; #(
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+) |
+  sed '
+     /^ac_cv_env_/b end
+     t clear
+     :clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test ${\1+y} || &/
+     t end
+     s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+  if test -w "$cache_file"; then
+    if test "x$cache_file" != "x/dev/null"; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
+  fi
+fi
+rm -f confcache
+
+
+
+ac_config_files="$ac_config_files Makefile dag_scrubber.spec"
+
+
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+
+  (set) 2>&1 |
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;; #(
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+) |
+  sed '
+     /^ac_cv_env_/b end
+     t clear
+     :clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test ${\1+y} || &/
+     t end
+     s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+  if test -w "$cache_file"; then
+    if test "x$cache_file" != "x/dev/null"; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
+  else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+U=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
+  ac_i=`printf "%s\n" "$ac_i" | sed "$ac_script"`
+  # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
+  #    will be set to the directory where LIBOBJS objects are built.
+  as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+  as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
+printf %s "checking that generated files are newer than configure... " >&6; }
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: done" >&5
+printf "%s\n" "done" >&6; }
+ if test -n "$EXEEXT"; then
+  am__EXEEXT_TRUE=
+  am__EXEEXT_FALSE='#'
+else
+  am__EXEEXT_TRUE='#'
+  am__EXEEXT_FALSE=
+fi
+
+if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then
+  as_fn_error $? "conditional \"AMDEP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+: "${CONFIG_STATUS=./config.status}"
+ac_write_fail=0
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+printf "%s\n" "$as_me: creating $CONFIG_STATUS" >&6;}
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else $as_nop
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
+as_nl='
+'
+export as_nl
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
+
+# The user is always right.
+if ${PATH_SEPARATOR+false} :; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  printf "%s\n" "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else $as_nop
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else $as_nop
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -pR'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -pR'
+  fi
+else
+  as_ln_s='cp -pR'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+
+# as_fn_executable_p FILE
+# -----------------------
+# Test if FILE is an executable regular file.
+as_fn_executable_p ()
+{
+  test -f "$1" && test -x "$1"
+} # as_fn_executable_p
+as_test_x='test -x'
+as_executable_p=as_fn_executable_p
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.
+ac_log="
+This file was extended by dag_scrubber $as_me 0.5, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+on `(hostname || uname -n) 2>/dev/null | sed 1q`
+"
+
+_ACEOF
+
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+# Files that config.status was made for.
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
+config_commands="$ac_config_commands"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ac_cs_usage="\
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration.  Unless the files
+and actions are specified as TAGs, all are instantiated by default.
+
+Usage: $0 [OPTION]... [TAG]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number and configuration settings, then exit
+      --config     print configuration, then exit
+  -q, --quiet, --silent
+                   do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+      --file=FILE[:TEMPLATE]
+                   instantiate the configuration file FILE
+      --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Configuration commands:
+$config_commands
+
+Report bugs to <yuri@isi.edu>."
+
+_ACEOF
+ac_cs_config=`printf "%s\n" "$ac_configure_args" | sed "$ac_safe_unquote"`
+ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config='$ac_cs_config_escaped'
+ac_cs_version="\\
+dag_scrubber config.status 0.5
+configured by $0, generated by GNU Autoconf 2.71,
+  with options \\"\$ac_cs_config\\"
+
+Copyright (C) 2021 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+
+ac_pwd='$ac_pwd'
+srcdir='$srcdir'
+INSTALL='$INSTALL'
+MKDIR_P='$MKDIR_P'
+AWK='$AWK'
+test -n "\$AWK" || AWK=awk
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# The default lists apply if the user does not specify any file.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=?*)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
+  *)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
+    printf "%s\n" "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    printf "%s\n" "$ac_cs_config"; exit ;;
+  --debug | --debu | --deb | --de | --d | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
+    esac
+    as_fn_append CONFIG_FILES " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --he | --h)
+    # Conflict between --help and --header
+    as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+  --help | --hel | -h )
+    printf "%s\n" "$ac_cs_usage"; exit ;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
+
+  *) as_fn_append ac_config_targets " $1"
+     ac_need_defaults=false ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+if \$ac_cs_recheck; then
+  set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+  shift
+  \printf "%s\n" "running CONFIG_SHELL=$SHELL \$*" >&6
+  CONFIG_SHELL='$SHELL'
+  export CONFIG_SHELL
+  exec "\$@"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+  printf "%s\n" "$ac_log"
+} >&5
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+#
+# INIT-COMMANDS
+#
+AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+
+# Handling of arguments.
+for ac_config_target in $ac_config_targets
+do
+  case $ac_config_target in
+    "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;;
+    "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+    "dag_scrubber.spec") CONFIG_FILES="$CONFIG_FILES dag_scrubber.spec" ;;
+
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  esac
+done
+
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test ${CONFIG_FILES+y} || CONFIG_FILES=$config_files
+  test ${CONFIG_HEADERS+y} || CONFIG_HEADERS=$config_headers
+  test ${CONFIG_COMMANDS+y} || CONFIG_COMMANDS=$config_commands
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+  tmp= ac_tmp=
+  trap 'exit_status=$?
+  : "${ac_tmp:=$tmp}"
+  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
+' 0
+  trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+  test -d "$tmp"
+}  ||
+{
+  tmp=./conf$$-$RANDOM
+  (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+  eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+  ac_cs_awk_cr='\\r'
+else
+  ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+  echo "cat >conf$$subs.awk <<_ACEOF" &&
+  echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+  echo "_ACEOF"
+} >conf$$subs.sh ||
+  as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+  . ./conf$$subs.sh ||
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  if test $ac_delim_n = $ac_delim_num; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+  N
+  s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
+  for (key in S) S_is_set[key] = 1
+  FS = ""
+
+}
+{
+  line = $ 0
+  nfields = split(line, field, "@")
+  substed = 0
+  len = length(field[1])
+  for (i = 2; i < nfields; i++) {
+    key = field[i]
+    keylen = length(key)
+    if (S_is_set[key]) {
+      value = S[key]
+      line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+      len += length(value) + length(field[++i])
+      substed = 1
+    } else
+      len += 1 + keylen
+  }
+
+  print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+  sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+  cat
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
+  || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
+h
+s///
+s/^/:/
+s/[	 ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[	 ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[	 ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+  ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_tt"; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any.  Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  for (key in D) D_is_set[key] = 1
+  FS = ""
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+  line = \$ 0
+  split(line, arg, " ")
+  if (arg[1] == "#") {
+    defundef = arg[2]
+    mac1 = arg[3]
+  } else {
+    defundef = substr(arg[1], 2)
+    mac1 = arg[2]
+  }
+  split(mac1, mac2, "(") #)
+  macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
+  if (D_is_set[macro]) {
+    # Preserve the white space surrounding the "#".
+    print prefix "define", macro P[macro] D[macro]
+    next
+  } else {
+    # Replace #undef with comments.  This is necessary, for example,
+    # in the case of _POSIX_SOURCE, which is predefined and required
+    # on some systems where configure will not decide to define it.
+    if (defundef == "undef") {
+      print "/*", prefix defundef, macro, "*/"
+      next
+    }
+  }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+  as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS    :C $CONFIG_COMMANDS"
+shift
+for ac_tag
+do
+  case $ac_tag in
+  :[FHLC]) ac_mode=$ac_tag; continue;;
+  esac
+  case $ac_mode$ac_tag in
+  :[FHL]*:*);;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :[FH]-) ac_tag=-:-;;
+  :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+  esac
+  ac_save_IFS=$IFS
+  IFS=:
+  set x $ac_tag
+  IFS=$ac_save_IFS
+  shift
+  ac_file=$1
+  shift
+
+  case $ac_mode in
+  :L) ac_source=$1;;
+  :[FH])
+    ac_file_inputs=
+    for ac_f
+    do
+      case $ac_f in
+      -) ac_f="$ac_tmp/stdin";;
+      *) # Look for the file first in the build tree, then in the source tree
+	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
+	 # because $ac_f cannot contain `:'.
+	 test -f "$ac_f" ||
+	   case $ac_f in
+	   [\\/$]*) false;;
+	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+	   esac ||
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+      esac
+      case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      as_fn_append ac_file_inputs " '$ac_f'"
+    done
+
+    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # use $as_me), people would be surprised to read:
+    #    /* config.h.  Generated by config.status.  */
+    configure_input='Generated from '`
+	  printf "%s\n" "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	`' by configure.'
+    if test x"$ac_file" != x-; then
+      configure_input="$ac_file.  $configure_input"
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+printf "%s\n" "$as_me: creating $ac_file" >&6;}
+    fi
+    # Neutralize special characters interpreted by sed in replacement strings.
+    case $configure_input in #(
+    *\&* | *\|* | *\\* )
+       ac_sed_conf_input=`printf "%s\n" "$configure_input" |
+       sed 's/[\\\\&|]/\\\\&/g'`;; #(
+    *) ac_sed_conf_input=$configure_input;;
+    esac
+
+    case $ac_tag in
+    *:-:* | *:-) cat >"$ac_tmp/stdin" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+    esac
+    ;;
+  esac
+
+  ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$ac_file" : 'X\(//\)[^/]' \| \
+	 X"$ac_file" : 'X\(//\)$' \| \
+	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  as_dir="$ac_dir"; as_fn_mkdir_p
+  ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+  case $ac_mode in
+  :F)
+  #
+  # CONFIG_FILE
+  #
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+  esac
+  ac_MKDIR_P=$MKDIR_P
+  case $MKDIR_P in
+  [\\/$]* | ?:[\\/]* ) ;;
+  */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
+  esac
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+  p
+  q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+printf "%s\n" "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  ac_datarootdir_hack='
+  s&@datadir@&$datadir&g
+  s&@docdir@&$docdir&g
+  s&@infodir@&$infodir&g
+  s&@localedir@&$localedir&g
+  s&@mandir@&$mandir&g
+  s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
+s&@MKDIR_P@&$ac_MKDIR_P&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
+      "$ac_tmp/out"`; test -z "$ac_out"; } &&
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&5
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&2;}
+
+  rm -f "$ac_tmp/stdin"
+  case $ac_file in
+  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
+  esac \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+  :H)
+  #
+  # CONFIG_HEADER
+  #
+  if test x"$ac_file" != x-; then
+    {
+      printf "%s\n" "/* $configure_input  */" >&1 \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
+    } >"$ac_tmp/config.h" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+printf "%s\n" "$as_me: $ac_file is unchanged" >&6;}
+    else
+      rm -f "$ac_file"
+      mv "$ac_tmp/config.h" "$ac_file" \
+	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    fi
+  else
+    printf "%s\n" "/* $configure_input  */" >&1 \
+      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
+      || as_fn_error $? "could not create -" "$LINENO" 5
+  fi
+# Compute "$ac_file"'s index in $config_headers.
+_am_arg="$ac_file"
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`$as_dirname -- "$_am_arg" ||
+$as_expr X"$_am_arg" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$_am_arg" : 'X\(//\)[^/]' \| \
+	 X"$_am_arg" : 'X\(//\)$' \| \
+	 X"$_am_arg" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$_am_arg" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`/stamp-h$_am_stamp_count
+ ;;
+
+  :C)  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+printf "%s\n" "$as_me: executing $ac_file commands" >&6;}
+ ;;
+  esac
+
+
+  case $ac_file$ac_mode in
+    "depfiles":C) test x"$AMDEP_TRUE" != x"" || {
+  # Older Autoconf quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  case $CONFIG_FILES in #(
+  *\'*) :
+    eval set x "$CONFIG_FILES" ;; #(
+  *) :
+    set x $CONFIG_FILES ;; #(
+  *) :
+     ;;
+esac
+  shift
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
+  do
+    # Strip MF so we end up with the name of the file.
+    am_mf=`printf "%s\n" "$am_mf" | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`$as_dirname -- "$am_mf" ||
+$as_expr X"$am_mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$am_mf" : 'X\(//\)[^/]' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X"$am_mf" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    am_filepart=`$as_basename -- "$am_mf" ||
+$as_expr X/"$am_mf" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+printf "%s\n" X/"$am_mf" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    { echo "$as_me:$LINENO: cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles" >&5
+   (cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } || am_rc=$?
+  done
+  if test $am_rc -ne 0; then
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE=\"gmake\" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+  { am_dirpart=; unset am_dirpart;}
+  { am_filepart=; unset am_filepart;}
+  { am_mf=; unset am_mf;}
+  { am_rc=; unset am_rc;}
+  rm -f conftest-deps.mk
+}
+ ;;
+
+  esac
+done # for ac_tag
+
+
+as_fn_exit 0
+_ACEOF
+ac_clean_files=$ac_clean_files_save
+
+test $ac_write_fail = 0 ||
+  as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || as_fn_exit 1
+fi
+if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+fi
+
+
+if test -z "$found_ssl" -o -z "$found_pcap"; then
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: --------------------------------------------------" >&5
+printf "%s\n" "$as_me: WARNING: --------------------------------------------------" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Some scrubber components were not found:          " >&5
+printf "%s\n" "$as_me: WARNING: Some scrubber components were not found:          " >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: " >&5
+printf "%s\n" "$as_me: WARNING: " >&2;}
+ 	test -z "$found_ssl"  && {
+		as_fn_error $? "	Could not find libssl                      " "$LINENO" 5
+	}
+	test -z "$found_pcap" && {
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 	Could not find libpcap                     " >&5
+printf "%s\n" "$as_me: WARNING: 	Could not find libpcap                     " >&2;}
+	}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: " >&5
+printf "%s\n" "$as_me: WARNING: " >&2;}
+ 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: --------------------------------------------------" >&5
+printf "%s\n" "$as_me: WARNING: --------------------------------------------------" >&2;}
+else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: ------------------------------------------------" >&5
+printf "%s\n" "$as_me: ------------------------------------------------" >&6;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: No errors, everything seems to be in place      " >&5
+printf "%s\n" "$as_me: No errors, everything seems to be in place      " >&6;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: ------------------------------------------------" >&5
+printf "%s\n" "$as_me: ------------------------------------------------" >&6;}
+fi
+
+
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..2155474
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,75 @@
+#Autoconfigure for lander
+#$Id$
+AC_INIT([dag_scrubber], [0.5], [yuri@isi.edu])
+AC_SUBST(RELEASE, [${RELEASE:-2}])
+
+AC_CONFIG_AUX_DIR(.build-aux)
+AM_INIT_AUTOMAKE([-Wall -Wno-portability -Werror foreign])
+
+AC_CONFIG_HEADERS([config.h])
+
+#checks for programs
+AC_PROG_CC
+AC_PROG_INSTALL
+#AC_PROG_MKDIR_P
+AC_PROG_LN_S
+#AC_PROG_SED
+AC_PROG_AWK
+
+
+#check for libraries
+found_pcap=
+AC_CHECK_LIB([pcap], [pcap_open_offline],
+	     [#restore libs
+	      LIBS=$ac_check_lib_save_LIBS
+	      found_pcap=yes
+	     ])
+found_ssl=
+
+AC_CHECK_LIB([crypto], [BF_ecb_encrypt],
+	     [#restore libs
+	      LIBS=$ac_check_lib_save_LIBS
+	      found_ssl=yes
+	     ])
+#check for headers
+if test -n "$found_ssl"; then
+	AC_CHECK_HEADER([openssl/md5.h],,[found_ssl=])
+fi
+if test -n "$found_ssl"; then
+	AC_CHECK_HEADER([openssl/blowfish.h],,[found_ssl=])
+fi
+if test -n "$found_ssl"; then
+    	AC_CHECK_HEADER([openssl/sha.h],,[found_ssl=])
+fi
+if test -n "$found_pcap"; then
+    	AC_CHECK_HEADER([pcap.h],, [found_pcap=])
+fi
+AC_CACHE_SAVE
+
+
+
+AC_CONFIG_FILES([
+		 Makefile
+                 dag_scrubber.spec
+		 ])
+
+AC_OUTPUT
+
+if test -z "$found_ssl" -o -z "$found_pcap"; then
+	AC_MSG_WARN([--------------------------------------------------])
+	AC_MSG_WARN([Some scrubber components were not found:          ])
+	AC_MSG_WARN([])
+ 	test -z "$found_ssl"  && {
+		AC_MSG_ERROR([	Could not find libssl                      ])
+	}
+	test -z "$found_pcap" && {
+		AC_MSG_WARN([	Could not find libpcap                     ])
+	}
+	AC_MSG_WARN([])
+ 	AC_MSG_WARN([--------------------------------------------------])
+else
+	AC_MSG_NOTICE([------------------------------------------------])
+	AC_MSG_NOTICE([No errors, everything seems to be in place      ])
+	AC_MSG_NOTICE([------------------------------------------------])
+fi
+
diff --git a/cryptopANT.c b/cryptopANT.c
new file mode 100644
index 0000000..0ef0092
--- /dev/null
+++ b/cryptopANT.c
@@ -0,0 +1,669 @@
+/* -*-  Mode:C; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
+/*
+ * Copyright (C) 2004-2018 by the University of Southern California
+ * $Id: 35e089a7da2122012654b19832826c3224f1f2dc $
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+// #ifndef lint
+// static const char rcsid[] =
+//     "@(#) $Id: 35e089a7da2122012654b19832826c3224f1f2dc $";
+// #endif
+
+#include <stdio.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <openssl/md5.h>
+#include <openssl/blowfish.h>
+#include <openssl/sha.h>
+#include <openssl/aes.h>
+
+#include "cryptopANT.h"
+
+#define MAX_BLK_LENGTH		32
+#define CACHE_BITS		24	/* How many bits of IPv4 we cache, cannot be zero */
+#define BF_KEYLEN		16	/* bytes */
+
+#define TEST_CACHE 		0
+
+#define RESET_ETHER_MCAST(p)	(*(char*)(p) &= 0xfe)
+
+#ifndef MAX
+#define MAX(a,b)		((a) > (b) ? (a) : (b))
+#endif
+
+#ifdef HAVE__U6_ADDR32
+#define s6_addr32 __u6_addr.__u6_addr32
+#endif
+
+//determined by autoconf
+#ifdef WORDS_BIGENDIAN
+//sigh, older version of the code was not byte-order safe; this is needed
+//to ensure backward compatibility AND compatibility with BE-systems.
+#include <byteswap.h>
+#define cryptopant_swap32(x) bswap_32(x)
+#else
+#define cryptopant_swap32(x) (x)
+#endif
+
+typedef struct ipv4_hash_blk_ {
+	uint32_t	ip4;
+	uint8_t		pad[MAX_BLK_LENGTH - sizeof(uint32_t)];
+} ipv4_hash_blk_t;
+
+typedef struct ipv6_hash_blk_ {
+	struct in6_addr	ip6;
+	uint8_t		pad[MAX_BLK_LENGTH - sizeof(struct in6_addr)];
+} ipv6_hash_blk_t;
+
+
+uint8_t		scramble_ether_addr[ETHER_ADDR_LEN];
+uint16_t	scramble_ether_vlan;
+int		scramble_mac;
+
+static int 	readhexstring	(FILE *, u_char *, int *);
+
+static uint32_t ip4cache[1<<CACHE_BITS];
+static uint32_t ip4pad; 			/* first 4 bytes of pad */
+static uint32_t ip6pad[4];
+static u_char	scramble_mac_buf[MAX_BLK_LENGTH];
+
+static struct {
+	AES_KEY	aeskey;
+	BF_KEY  bfkey;
+} scramble_key;
+static uint8_t	ivec[64];
+
+/* statistics */
+static long	ipv4_cache_hits = 0;
+static long	ipv4_anon_calls = 0;
+static long	ipv6_anon_calls = 0;
+
+
+static ipv4_hash_blk_t b4_in, b4_out;
+static ipv6_hash_blk_t b6_in, b6_out;
+
+static scramble_crypt_t scramble_crypto4 = SCRAMBLE_BLOWFISH;
+static scramble_crypt_t scramble_crypto6 = SCRAMBLE_BLOWFISH;
+
+static struct {
+	char 			*name;
+	scramble_crypt_t	type;
+} scramble_names[] = {
+	{ "md5",	SCRAMBLE_MD5 },
+	{ "blowfish",	SCRAMBLE_BLOWFISH },
+	{ "aes",	SCRAMBLE_AES },
+	{ "sha",	SCRAMBLE_SHA1 },
+};
+
+const char *
+scramble_type2name(scramble_crypt_t t)
+{
+	int i;
+	for (i = 0; i < sizeof(scramble_names)/sizeof(scramble_names[0]); ++i)
+		if (scramble_names[i].type == t)
+			return scramble_names[i].name;
+	return NULL;
+}
+
+scramble_crypt_t
+scramble_name2type(const char *name)
+{
+	int i;
+	for (i = 0; i < sizeof(scramble_names)/sizeof(scramble_names[0]); ++i)
+		if (strcasecmp(name, scramble_names[i].name) == 0)
+			return scramble_names[i].type;
+	return SCRAMBLE_NONE;
+}
+
+scramble_crypt_t
+scramble_crypto_ip4(void)
+{
+	return scramble_crypto4;
+}
+
+scramble_crypt_t
+scramble_crypto_ip6(void)
+{
+	return scramble_crypto6;
+}
+
+int
+scramble_newkey(u_char *key, int klen)
+{
+	FILE *rnd = fopen(SCRAMBLE_RANDOM_DEV, "r");
+	if (rnd == NULL) {
+		perror("scramble_newkey(): fopen");
+		return -1;
+	}
+	if (fread(key, 1, klen, rnd) != klen) {
+		perror("scramble_newkey(): fread");
+		fclose(rnd);
+		return -1;
+	}
+	fclose(rnd);
+	return 0;
+}
+
+int
+scramble_newpad(u_char *pad, int plen)
+{
+	FILE *rnd = fopen(SCRAMBLE_RANDOM_DEV, "r");
+	if (rnd == NULL) {
+		perror("scramble_newpad(): fopen");
+		return -1;
+	}
+	if (fread(pad, 1, plen, rnd) != plen) {
+		perror("scramble_newpad(): fread");
+		fclose(rnd);
+		return -1;
+	}
+	fclose(rnd);
+	return 0;
+}
+
+int
+scramble_newmac(u_char *mac, int mlen)
+{
+	FILE *rnd = fopen(SCRAMBLE_RANDOM_DEV, "r");
+	if (rnd == NULL) {
+		perror("scramble_newkey(): fopen");
+		return -1;
+	}
+	if (fread(mac, 1, mlen, rnd) != mlen) {
+		perror("scramble_newkey(): fread");
+		fclose(rnd);
+		return -1;
+	}
+	fclose(rnd);
+	return 0;
+}
+
+int
+scramble_newiv(u_char *iv, int ivlen)
+{
+	FILE *rnd = fopen(SCRAMBLE_RANDOM_DEV, "r");
+	if (rnd == NULL) {
+		perror("scramble_newiv(): fopen");
+		return -1;
+	}
+	if (fread(iv, 1, ivlen, rnd) != ivlen) {
+		perror("scramble_newiv(): fread");
+		fclose(rnd);
+		return -1;
+	}
+	fclose(rnd);
+	return 0;
+}
+
+/* read a hex string from fd at current position and store it in s */
+static int
+readhexstring(FILE *f, u_char *s, int *len)
+{
+        char c = 0;
+	int i;
+	for (i = 0; i < *len + 1; ++i) {
+		switch (fread(&c, 1, 1, f)) {
+		case 0:
+			*len = i;
+			return 0;
+		case 1:
+			break;
+		default:
+			return -1;
+		}
+		if (!isxdigit(c)) {
+			*len = i;
+			return 0;
+		}
+		s[i] = ((isdigit(c)) ? c - '0' : tolower(c) - 'a' + 10) << 4;
+		if (fread(&c, 1, 1, f) != 1) {
+			*len = i;
+			return -1; /* error: a byte has 2 digits */
+		}
+		if (!isxdigit(c)) {
+			*len = i;
+			return -1;
+		}
+		s[i] |= (isdigit(c)) ? c - '0' : tolower(c) - 'a' + 10;
+	}
+	if (i == *len + 1)
+		return -1; /* means buffer is too short */
+	return 0;
+}
+
+int
+scramble_readstate(const char *fn, scramble_state_t *s)
+{
+	u_char c4, c6;
+	int l4 = 1, l6 = 1;
+	FILE *f = fopen(fn, "r");
+	if (f == NULL) {
+		perror("scramble_readstate(): fopen");
+		return -1;
+	}
+	if (readhexstring(f, (u_char*)&c4, &l4) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading c4");
+		fclose(f);
+		return -1;
+	}
+	assert(l4 == 1);
+	s->c4 = (scramble_crypt_t)c4;
+	if (readhexstring(f, (u_char*)&c6, &l6) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading c6");
+		fclose(f);
+		return -1;
+	}
+	assert(l6 == 1);
+	s->c6 = (scramble_crypt_t)c6;
+	if (readhexstring(f, s->key, &s->klen) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading key");
+		fclose(f);
+		return -1;
+	}
+	if (readhexstring(f, s->pad, &s->plen) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading pad");
+		fclose(f);
+		return -1;
+	}
+	if (readhexstring(f, s->mac, &s->mlen) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading mac");
+		fclose(f);
+		return -1;
+	}
+	if (readhexstring(f, s->iv, &s->ivlen) != 0) {
+		fprintf(stderr, "scramble_readstate(): error reading iv");
+		fclose(f);
+		return -1;
+	}
+	fclose(f);
+	return 0;
+}
+
+int
+scramble_savestate(const char *fn, const scramble_state_t *s)
+{
+	int i;
+	/* set restrictive mode */
+	int fd = creat(fn, S_IRUSR|S_IWUSR);
+	if (fd < 0) {
+		perror("scramble_savestate(): open");
+		return -1;
+	}
+	FILE *f = fdopen(fd, "w");
+	if (f == NULL) {
+		perror("scramble_savestate(): fopen");
+		return -1;
+	}
+	if (fprintf(f, "%02x:%02x:", (unsigned)s->c4, (unsigned)s->c6) < 0) {
+		perror("scramble_savestate(): error saving cryptos");
+		fclose(f);
+		return -1;
+	}
+	for (i = 0; i < s->klen; ++i) {
+		if (fprintf(f, "%02x", s->key[i]) < 0) {
+			perror("scramble_savestate(): error saving key");
+			fclose(f);
+			return -1;
+		}
+	}
+	fprintf(f, ":");
+	for (i = 0; i < s->plen; ++i) {
+		if (fprintf(f, "%02x", s->pad[i]) < 0) {
+			perror("scramble_savestate(): error saving pad");
+			fclose(f);
+			return -1;
+		}
+	}
+	fprintf(f, ":");
+	for (i = 0; i < s->mlen; ++i) {
+		if (fprintf(f, "%02x", s->mac[i]) < 0) {
+			perror("scramble_savestate(): error saving mac");
+			fclose(f);
+			return -1;
+		}
+	}
+
+	fprintf(f, ":");
+	for (i = 0; i < s->ivlen; ++i) {
+		if (fprintf(f, "%02x", s->iv[i]) < 0) {
+			perror("scramble_savestate(): error saving lv");
+			fclose(f);
+			return -1;
+		}
+	}
+	fprintf(f, "\n");
+	fclose(f);
+	return 0;
+}
+
+int
+scramble_init(const scramble_state_t *s)
+{
+
+	int plen;
+	if (s->plen > MAX_BLK_LENGTH)
+		plen = MAX_BLK_LENGTH;
+	else
+		plen = s->plen;
+
+	scramble_crypto4 = s->c4;
+	scramble_crypto6 = s->c6;
+
+	memcpy(&b4_in, s->pad, plen);
+	ip4pad = cryptopant_swap32(b4_in.ip4);
+
+	memcpy(&b6_in, s->pad, s->plen);
+	ip6pad[0] = b6_in.ip6.s6_addr32[0];
+	ip6pad[1] = b6_in.ip6.s6_addr32[1];
+	ip6pad[2] = b6_in.ip6.s6_addr32[2];
+	ip6pad[3] = b6_in.ip6.s6_addr32[3];
+
+	if (s->c4 == SCRAMBLE_BLOWFISH || s->c6 == SCRAMBLE_BLOWFISH) {
+		BF_set_key(&scramble_key.bfkey, s->klen, s->key);
+        }
+	if (s->c4 == SCRAMBLE_AES || s->c6 == SCRAMBLE_AES) {
+                AES_set_encrypt_key(s->key, s->klen*8, &scramble_key.aeskey);
+	}
+
+	scramble_mac = 0;
+
+	memcpy(scramble_mac_buf, s->mac, s->mlen);
+
+	if (s->mlen > 0) {
+		scramble_mac = 1;
+		if (s->mlen < ETHER_ADDR_LEN + ETHER_VLAN_LEN) {
+			fprintf(stderr,
+				"scramble_init(): mac string is too short (%d)\n",
+				s->mlen);
+			return -1;
+		}
+	}
+	memcpy(scramble_ether_addr, scramble_mac_buf, ETHER_ADDR_LEN);
+
+	/* we don't want to map ether unicast to multicast and visa versa */
+	RESET_ETHER_MCAST(scramble_ether_addr);
+
+	memcpy(&scramble_ether_vlan, scramble_mac_buf + ETHER_ADDR_LEN, ETHER_VLAN_LEN);
+	return 0;
+}
+
+/* init everything from file, if it doesn't exist, create it */
+int
+scramble_init_from_file(const char *fn, scramble_crypt_t c4, scramble_crypt_t c6, int *do_mac)
+{
+	u_char pad[MAX_BLK_LENGTH];
+	u_char key[MAX_BLK_LENGTH];
+	u_char mac[MAX_BLK_LENGTH];
+	u_char iv[MAX_BLK_LENGTH];
+
+	scramble_state_t s;
+	FILE *f;
+
+	s.pad = pad;
+	s.key = key;
+	s.mac = mac;
+	s.iv  = iv;
+	if ((f = fopen(fn, "r")) == NULL) {
+		if (errno != ENOENT) {
+			perror("scamble_init_file(): fopen");
+			return -1;
+		}
+		if (c4 == SCRAMBLE_NONE || c6 == SCRAMBLE_NONE)
+			return -1;
+
+		/* file doesn't exist, create it */
+		s.c4 = c4;
+		s.c6 = c6;
+		s.plen = MAX_BLK_LENGTH;
+		s.klen = 16; /* XXX */
+		s.ivlen = 16;
+
+		if (scramble_newpad(pad, s.plen) < 0)
+			return -1;
+		if (scramble_newkey(key, s.klen) < 0)
+			return -1;
+		if (scramble_newiv(iv, s.ivlen) < 0)
+			return -1;
+		if (do_mac && *do_mac) {
+			s.mlen = ETHER_ADDR_LEN + ETHER_VLAN_LEN;
+			if (scramble_newmac(mac, s.mlen) < 0)
+				return -1;
+		} else
+			s.mlen = 0;
+		if (scramble_savestate(fn, &s) < 0)
+			return -1;
+	} else {
+		fclose(f);
+		s.plen = MAX_BLK_LENGTH;
+		s.klen = MAX_BLK_LENGTH;
+		s.mlen = MAX_BLK_LENGTH;
+		s.ivlen = MAX_BLK_LENGTH;
+		if (scramble_readstate(fn, &s) < 0)
+			return -1;
+		if (do_mac)
+			*do_mac = (s.mlen > 0);
+	}
+
+	if (scramble_init(&s) < 0)
+		return -1;
+	return 0;
+}
+
+/* scramble IPv4 addresses, input and output are in network byte order */
+uint32_t
+scramble_ip4(uint32_t input, int pass_bits) {
+	uint32_t output = 0;
+	uint32_t m = 0xffffffff << 1;
+	int i = 31;
+	int class_bits = 0;
+	int pbits = 0;
+#define MAX_CLASS_BITS		4
+	static int _class_bits[1<<MAX_CLASS_BITS] = {
+		1,1,1,1,1,1,1,1, /* class A: preserve 1 bit  */
+		2,2,2,2,	 /* class B: preserve 2 bits */
+		3,3,		 /* class C: preserve 3 bits */
+		4,		 /* class D: preserve 4 bits */
+		32 		 /* class bad, preserve all  */
+	};
+	uint32_t *cp;
+
+	input = ntohl(input);
+	cp = ip4cache + (input >> (32 - CACHE_BITS));
+
+	assert(pass_bits >= 0 && pass_bits < 33);
+
+	++ipv4_anon_calls;
+
+	b4_in.ip4 = input;
+
+	class_bits = _class_bits[input >> (32-MAX_CLASS_BITS)];
+
+	// check cache first
+	output = *cp;
+	if (output != 0) {
+		output <<= (32 - CACHE_BITS);
+		if (class_bits < CACHE_BITS)
+			class_bits = CACHE_BITS;
+		++ipv4_cache_hits;
+	}
+
+	pbits = MAX(pass_bits, class_bits);
+
+	for (i = 31; i > pbits - 1; --i) {
+		/* pass through 'i' highest bits of ip4 */
+		b4_in.ip4 &= m;
+		/* the following could be:
+		 *   b4_in.ip4 |= (ip4pad & ~m); */
+		b4_in.ip4 |= (ip4pad >> i);
+		b4_in.ip4 = cryptopant_swap32(b4_in.ip4);
+		switch (scramble_crypto4) {
+		case SCRAMBLE_MD5:
+			MD5((u_char*)&b4_in, MD5_DIGEST_LENGTH, (u_char*)&b4_out);
+			break;
+		case SCRAMBLE_BLOWFISH:
+			BF_ecb_encrypt((u_char*)&b4_in, (u_char*)&b4_out, &scramble_key.bfkey, BF_ENCRYPT);
+			break;
+		case SCRAMBLE_AES:
+			AES_ecb_encrypt((u_char*)&b4_in, (u_char*)&b4_out, &scramble_key.aeskey, AES_ENCRYPT);
+			break;
+		case SCRAMBLE_SHA1:
+			SHA1((u_char*)&b4_in, SHA_DIGEST_LENGTH, (u_char*)&b4_out);
+			break;
+		default:
+			abort();
+		}
+		output |= (( *((u_char*)&b4_out.ip4) & 1) << (31 - i));
+		b4_in.ip4 = cryptopant_swap32(b4_in.ip4);
+		m <<= 1;
+	}
+
+	/* output == 0 is OK, means pass address unchanged */
+
+	*cp = (output >> (32 - CACHE_BITS));
+
+	return htonl(output ^ input);
+}
+
+/* scramble ipv6 address in place, in network byte order */
+void
+scramble_ip6(struct in6_addr *input, int pass_bits)
+{
+	struct in6_addr output;
+	int i, w;
+	int pbits = pass_bits;
+
+	++ipv6_anon_calls;
+	b6_in.ip6.s6_addr32[0] = ip6pad[0]; /* XXX this one not needed */
+	b6_in.ip6.s6_addr32[1] = ip6pad[1];
+	b6_in.ip6.s6_addr32[2] = ip6pad[2];
+	b6_in.ip6.s6_addr32[3] = ip6pad[3];
+
+	for (w = 0; w < 4; ++w) {
+		uint32_t m = 0xffffffff << 1;
+		uint32_t x = ntohl(input->s6_addr32[w]);
+		uint32_t hpad = ntohl(ip6pad[w]);
+		output.s6_addr32[w] = 0;
+		/* anonymize x, using hpad */
+		for (i = 31; i > pbits - 1; --i) {
+			/* pass through 'i' highest bits of the word */
+			x &= m;
+			/* the following could be:
+			 *   x |= (hpad & ~m); */
+			x |= (hpad >> i);
+			b6_in.ip6.s6_addr32[w] = htonl(x);
+			/* hashing proper */
+			switch (scramble_crypto6) {
+			case SCRAMBLE_MD5:
+				MD5((u_char*)&b6_in, MD5_DIGEST_LENGTH, (u_char*)&b6_out);
+				break;
+			case SCRAMBLE_BLOWFISH:
+				/* use BF in chain mode */
+				memset(ivec, 0, sizeof(ivec));
+				BF_cbc_encrypt((u_char*)&b6_in, (u_char*)&b6_out,
+					       sizeof(struct in6_addr),
+					       &scramble_key.bfkey,
+					       ivec, BF_ENCRYPT);
+				break;
+			case SCRAMBLE_AES:
+				AES_ecb_encrypt((u_char*)&b6_in, (u_char*)&b6_out,
+						&scramble_key.aeskey, AES_ENCRYPT);
+				break;
+			case SCRAMBLE_SHA1:
+				SHA1((u_char*)&b6_in, SHA_DIGEST_LENGTH, (u_char*)&b6_out);
+				break;
+			default:
+				abort();
+			}
+			output.s6_addr32[w] |= ((ntohl(b6_out.ip6.s6_addr32[3]) & 1)
+						<< (31 - i));
+			m <<= 1;
+		}
+		pbits = (pbits >= 32) ? pbits - 32 : 0;
+		/* pbits >= 32 this means the above for-loop wasn't executed */
+
+		output.s6_addr32[w] = htonl(output.s6_addr32[w]) ^ input->s6_addr32[w];
+
+		/* restore the word */
+		b6_in.ip6.s6_addr32[w] = input->s6_addr32[w];
+	}
+	*input = output;
+}
+
+/* reverse map scrambled IP addresses, all network byte order */
+uint32_t
+unscramble_ip4(uint32_t input, int pass_bits)
+{
+	int i;
+	uint32_t guess, res;
+
+	guess = input; /* Starting with the input seems
+		        * a good idea because some bits
+			* may be passed through
+			* unchanged */
+	for (i=32; i>0; --i) {
+		res = scramble_ip4(guess, pass_bits);
+		/* we're only interested in flipping the
+		 * higher bit, don't care about the rest */
+		res ^= input;
+		if (res == 0)
+			return guess;
+		guess ^= res;
+	}
+	//unreachable, since there should be always a match
+	//(since we're zeroing out at least one bit per iteration)
+	assert(0);
+	return (0xffffffff); /* cannot find the match */
+}
+
+/* unscramble ipv6 address in place, in network byte order */
+void
+unscramble_ip6(struct in6_addr *input, int pass_bits)
+{
+	struct in6_addr guess;
+	struct in6_addr res;
+	uint32_t r = 0;
+
+	int i;
+
+	guess = *input;
+	for (i = 0; i < 4; ++i) {
+		for (;;) {
+			res = guess;
+			scramble_ip6(&res, pass_bits);
+			r = res.s6_addr32[i] ^ input->s6_addr32[i];
+
+			if (r == 0) break;
+
+			guess.s6_addr32[i] ^= r;
+		}
+
+	}
+	*input = guess;
+	return;
+}
diff --git a/cryptopANT.h b/cryptopANT.h
new file mode 100644
index 0000000..63bab97
--- /dev/null
+++ b/cryptopANT.h
@@ -0,0 +1,91 @@
+/* -*-  Mode:C; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
+/*
+ * Copyright (C) 2004-2018 by the University of Southern California
+ * $Id: 58a4704e7a2580bed5f7eac76cd23b809dd558fa $
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+
+#ifndef _SCRAMBLE_CRYPT_H
+#define _SCRAMBLE_CRYPT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ETHER_ADDR_LEN		6
+#define ETHER_VLAN_LEN		2
+
+#define _XOR16(a, b, i)         (((uint16_t *)(a))[i] ^= ((uint16_t *)(b))[i])
+#define _XOR32(a, b, i)         (((uint32_t *)(a))[i] ^= ((uint32_t *)(b))[i])
+
+#define SCRAMBLE_ETHER_ADDR(a)  if (1) {     \
+        _XOR32(a, scramble_ether_addr, 0);              \
+        _XOR16(a, scramble_ether_addr, 2);              \
+    }
+
+#define SCRAMBLE_ETHER_VLAN(v)	((v) ^= scramble_ether_vlan);
+
+#define SCRAMBLE_RANDOM_DEV	"/dev/urandom" 
+
+typedef enum {
+	SCRAMBLE_NONE		= 0x00,
+	SCRAMBLE_MD5 		= 0x01,
+	SCRAMBLE_BLOWFISH 	= 0x02,
+	SCRAMBLE_AES 		= 0x03,
+	SCRAMBLE_SHA1		= 0x04
+} scramble_crypt_t;
+
+typedef struct {
+	scramble_crypt_t	c4;
+	scramble_crypt_t	c6;
+	u_char			*key;
+	int			klen;
+	u_char			*pad;
+	int			plen;
+	u_char			*mac;
+	int			mlen;
+	u_char			*iv;
+	int			ivlen;	
+} scramble_state_t;
+
+/* external vars exported by mac scrambling macros */
+extern uint8_t			scramble_ether_addr[ETHER_ADDR_LEN];
+extern uint16_t			scramble_ether_vlan;
+extern int		    	scramble_mac;		/* 0/1 */
+
+/* public functions */
+extern scramble_crypt_t scramble_crypto_ip4	(void);
+extern scramble_crypt_t scramble_crypto_ip6	(void);
+extern scramble_crypt_t	scramble_name2type	(const char *);
+extern const char*	scramble_type2name	(scramble_crypt_t);
+extern int		scramble_newkey		(u_char *, int);
+extern int		scramble_newpad		(u_char *, int);
+extern int		scramble_newmac		(u_char *, int);
+extern int		scramble_readstate	(const char *, scramble_state_t *);
+extern int		scramble_savestate	(const char *, const scramble_state_t *);
+extern int		scramble_init		(const scramble_state_t *s);
+extern int		scramble_init_from_file	(const char *, scramble_crypt_t, scramble_crypt_t, int *);
+extern uint32_t 	scramble_ip4		(uint32_t, int);
+extern uint32_t 	unscramble_ip4		(uint32_t, int);
+extern void		scramble_ip6		(struct in6_addr *, int);
+extern void		unscramble_ip6		(struct in6_addr *, int);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SCRAMBLE_CRYPT_H */
diff --git a/dag_scrubber.c b/dag_scrubber.c
new file mode 100644
index 0000000..a512850
--- /dev/null
+++ b/dag_scrubber.c
@@ -0,0 +1,1996 @@
+/* -*-  Mode:C; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
+/*
+ * Copyright (C) 2004-2021 by the University of Southern California
+ * $Id$
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+/* setup environment */
+#define _GNU_SOURCE		1
+#define _FILE_OFFSET_BITS	64
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include <netinet/in.h>
+#include <ctype.h>
+
+#include <stddef.h>
+#include <byteswap.h>
+#include <endian.h>
+#include <assert.h>
+#include <getopt.h>
+
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/icmp6.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+
+#include <pcap.h>
+
+#include "cryptopANT.h"
+#include "scramble_wlw.h"
+
+#define MAX_PROTO_NAME		15	/* chars in proto sym name */
+#define ERF_REC_LEN_MAX 	(1<<16) /* buffer is large enough to get zeroed out even if len=0xffff */
+#define ERF_FLAGS_IFACE_MAX 3
+
+#define MAX_IP_PROTO		255
+#define	ETH_ADDR_LEN		6	/* length of an ethernet address */
+
+#ifndef IPPROTO_EIGRP
+#define IPPROTO_EIGRP	88
+#elif IPPROTO_EIGRP != 88
+#error IPPROTO_EIGRP is not 88
+#endif /* IPPROTO_EIGRP */
+
+#ifndef IPPROTO_IGP
+#define IPPROTO_IGP	9
+#elif IPPROTO_IGP != 9
+#error IPPROTO_EIGRP is not 9
+#endif /* IPPROTO_IGP */
+
+#ifndef IPPROTO_OSPFIGP
+#define IPPROTO_OSPFIGP	89
+#elif IPPROTO_OSPFIGP != 89
+#error IPPROTO_OSPFIGP is not 89
+#endif /* IPPROTO_OSPFIGP */
+
+#ifndef IPPROTO_IPMP
+#define IPPROTO_IPMP	169 /* unassigned, but seems common */
+#endif /* IPPROTO_IPMP */
+
+#ifndef IPPROTO_TESTING_253_RFC3692
+#define IPPROTO_TESTING_253_RFC3692 253 /* used for testing */
+#endif /* IPPROTO_TESTING_253_RFC3692 */
+
+/* timestamp handling macro: they are in little-endian b.o. */
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define TS(x)			__bswap_64(x)
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define TS(x)			(x)
+#endif
+#ifndef TS
+#error __BYTE_ORDER is neither __BIG_ENDIAN nor __LITTLE_ENDIAN
+#endif
+
+/* Ethernet types */
+#define ETHERTYPE_IP		0x0800
+#define ETHERTYPE_IP6		0x86dd
+#define ETHERTYPE_8021Q		0x8100
+#define ETHERTYPE_ARP		0x0806
+#define ETHERTYPE_REVARP	0x8035
+#define ETHERTYPE_LOOPBACK	0x9000	/* Loopback (configuration test protocol) */
+#define ETHERTYPE_RESERVED	0xffff  /* "fake" frame added by dagsnap_lander to
+					   record system time as first and last in
+					   the trace */
+		
+#define UNUSED(x) 		do { (x) = (x); } while(0)
+#define max(a, b)		((a)>(b)?(a):(b))
+#define min(a, b)		((a)>(b)?(b):(a))
+
+#define IS_UNASS_IP_PROTO(p)	(((p) >= 138 && (p) <= 253) || (p) == 255)
+
+#define IS_IPV6OPT(proto)	((proto == IPPROTO_HOPOPTS)  || \
+				 (proto == IPPROTO_ROUTING)  || \
+				 (proto == IPPROTO_FRAGMENT) || \
+				 (proto == IPPROTO_DSTOPTS)  || \
+				 (proto == IPPROTO_NONE))
+
+#define IS_ETHER_MCAST(p)	(((*(char*)(p)) & 0x01) == 0x01)
+#define RESET_ETHER_MCAST(p)	(*(char*)(p) &= 0xfe)
+typedef enum {
+	PARSE_COND_SHORT, /* short packet */
+	PARSE_COND_ERROR, /* malformed packet */
+	PARSE_COND_SKIP,  /* ignore this packet */
+	PARSE_COND_OK     /* parsed OK */
+} parse_cond_t;
+
+typedef struct flags {
+	u_char		iface:2;
+	u_char		vlen:1;
+	u_char		trunc:1;
+	u_char		rxerror:1;
+	u_char		dserror:1;
+	u_char		pad:2;
+} flags_t;
+
+#define PCAP_RECORD_TYPE_ETH	     1000
+
+typedef struct dag_record_ {
+	uint64_t	ts;
+	uint8_t		type;
+#define DAG_RECORD_TYPE_ETH          2
+	flags_t		flags;
+	uint16_t	rlen;
+	uint16_t	lctr;
+	uint16_t	wlen;
+} dag_record_t;
+
+typedef struct {
+	int 		chop_tail;	/* length of the record's tail that can be scrapped */
+	parse_cond_t	cond;
+} parse_ret_t;
+
+typedef enum {
+	PARSE_IP4 = IPPROTO_IPIP,
+	PARSE_IP6 = IPPROTO_IPV6
+} parse_ip_t;
+
+typedef parse_ret_t (*proto_parser_t)(void *p, int len, int proto);
+
+typedef struct {
+	proto_parser_t	parser;		/* handler */
+	uint64_t	stats_cnt;	/* stats: totol count */
+	uint64_t	stats_err;	/* stats: malformed count */
+	char		name[MAX_PROTO_NAME+1]; /* pretty printing */
+} ipprotosw_t;
+
+typedef struct {
+	u_char		dst[ETH_ADDR_LEN];
+	u_char		src[ETH_ADDR_LEN];
+	u_int16_t	etype;
+	union {
+		u_char		_eth_pload[1];
+		struct {
+			u_short	_vlan_tag;
+			u_short _vlan_etype;
+			u_char	_vlan_pload[1];
+		}		_vlan;
+	} vlan_un;
+#define eth_pload	vlan_un._eth_pload
+#define vlan_tag	vlan_un._vlan._vlan_tag
+#define vlan_etype	vlan_un._vlan._vlan_etype
+#define vlan_pload	vlan_un._vlan._vlan_pload
+} eth_hdr_t;
+
+typedef struct {
+	u_char		offset;
+	u_char		pad;
+	/* followed by standard eth hdr */
+	eth_hdr_t	eth_hdr;
+} erf_eth_rec_t;
+
+
+typedef struct {
+	uint64_t	prev_ts;
+	uint64_t	diff_max;
+	uint64_t	min_ts;
+	uint64_t	max_ts;
+	int		not_increasing;
+	int		first_record;
+} ts_stats_t;
+
+typedef struct pnat_ip4_table_ {
+        uint32_t        ip4_from;
+        uint32_t        ip4_to;
+        struct pnat_ip4_table_ *next;
+} pnat_ip4_table_t;
+
+typedef struct pnat_ip6_table_ {
+        struct in6_addr ip6_from;
+        struct in6_addr ip6_to;
+        struct pnat_ip6_table_ *next;
+} pnat_ip6_table_t;
+
+static pnat_ip4_table_t *pnat_ip4_table = NULL;
+static pnat_ip6_table_t *pnat_ip6_table = NULL;
+
+static void		init_filter	(const char *, struct bpf_program *, int, int); 
+static int		run_filter	(const struct bpf_program *, const void *, int, int);
+
+static void		parse_init	(void);
+static void		parse_erf	(void);
+static void		parse_pcap	(void);
+
+static int		repair_erf	(int, int);
+
+static parse_ret_t	parse_erf_eth	(void *, int, int, int);
+
+static parse_ret_t	parse_link	(void *, int, int, int);
+static parse_ret_t	parse_eth	(void *, int, int, int);
+static parse_ret_t      parse_raw       (void *, int, int, int);
+
+static parse_ret_t	parse_ipv4	(void *, int, int);
+static parse_ret_t	parse_ipv4_opt	(struct iphdr * , int);
+static parse_ret_t	parse_icmp4	(void *, int, int);
+
+static parse_ret_t	parse_ipv6	(void *, int, int);
+static parse_ret_t	parse_ipv6_opt	(void *, int, int);
+static parse_ret_t	parse_icmp6	(void *, int, int);
+
+static parse_ret_t	parse_tcp	(void *, int, int);
+static parse_ret_t	parse_udp	(void *, int, int);
+static parse_ret_t	parse_esp	(void *, int, int);
+static parse_ret_t	parse_gre	(void *, int, int);
+static parse_ret_t	parse_ah	(void *, int, int);
+
+static parse_ret_t	parse_nofurther	(void *, int, int);
+static parse_ret_t	parse_zerowhole	(void *, int, int);
+#if 0
+static parse_ret_t	parse_unassigned(void *, int, int);
+#endif
+static parse_ret_t	parse_defaulterr(void *, int, int);
+
+static void             build_pnat_tables (char *);
+static uint32_t         pnat_ip4(uint32_t, int);
+static void             pnat_ip6(struct in6_addr *, int); 
+
+static void		usage		(void);
+static void		panic		(const char *, ...) __attribute__((noreturn, format (printf, 1, 2)));
+static void		error		(const char *, ...) __attribute__((unused, format (printf, 1, 2)));
+static void		warn		(const char *, ...) __attribute__((unused, format (printf, 1, 2)));
+static inline uint16_t	cksum_adjust	(uint32_t, uint32_t, uint32_t);
+
+#if 0
+static u_char	bpdu_ether_bcast[] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x00};
+#define IS_BPDU_ADDR(p)		(memcmp((p), bpdu_ether_bcast, sizeof(bpdu_ether_bcast)) == 0)
+#endif /* XXX not used */
+
+static const char 	*prog;
+static const char	*fi = NULL, *fo = NULL, *logdump = NULL;
+static FILE		*f_input, *f_output, *f_logdump;
+static int		do_pcap = 1;
+static int		do_chopping = 0;
+static int		do_warnings = 0;
+static char		*scramble_crypto_fn = NULL;
+static int		pass_bits4 = 0; /* # bits high-to-low to pass unscrambled (ipv4) */
+static int		pass_bits6 = 0; /* # bits high-to-low to pass unscrambled (ipv6) */
+static int		do_mac_scramble = 0;
+static int		do_preserve_vlantags = 0; /* -v option */
+static int		do_reverse_scramble = 0;  /* -r option */
+static int		do_ts_increase = 0; 	  /* -M option */
+static int		repair_damage = 0; 	  /* -R option */
+static int		nocksum = 0; 		  /* --nocksum */
+static char             *do_pnat = NULL;
+static char		*noscramble_prefixes = "";/* --no-scramble/--dont-scramble option */
+static int		keep_payload = 0;
+static int              do_scrambling = 0;
+
+static char		*pass_filter_expr = NULL; /* pass filter expression, drop everything else */
+static char		*paypass_filter_expr = NULL; /*pass payload filter expr */
+static struct 		bpf_program 	pass_pf;
+static struct 		bpf_program 	paypass_pf;
+static int		pcap_dlt = DLT_RAW;     /* XXX give an option to set this */
+static int		pcap_linktype = -10000; /* XXX neg number for non-existent link */
+static pcap_dumper_t 	*pcap_dumper = NULL;
+static pcap_dumper_t 	*pcap_logdumper = NULL;
+
+/* I don't like these two globals, but they simplify passing
+   checksum-relevant info between parsers */
+static uint16_t		ip_hdr_cksum_adj	= 0;
+
+static ipprotosw_t 	ipsw[MAX_IP_PROTO+1];
+
+/* parsers can return these, if no chopping needed */
+static parse_ret_t	PARSE_SHORT = { 0, PARSE_COND_SHORT };
+static parse_ret_t	PARSE_ERROR = { 0, PARSE_COND_ERROR };
+static parse_ret_t	PARSE_OK    = { 0, PARSE_COND_OK    };
+static parse_ret_t	PARSE_SKIP  = { 0, PARSE_COND_SKIP  };
+
+/* Two buffers are needed in case of repair.  The idea is to have to
+   buffers to use alternately, this way, when we come to a corruption
+   in the file, we have a previous record to work with */
+static char 		parse_buf[2][ERF_REC_LEN_MAX];
+static int		parse_buf_dex = 1; /* alternates between 0 and 1 */
+
+/* stats */
+static uint64_t 	rcount = 0, wcount = 0, fcount = 0, loss = 0;
+static uint64_t 	rbytes = 0, wbytes = 0;
+
+static inline void *cond_memset(void *s, int c, size_t n) {
+	if (keep_payload) {
+		/* if doing filtering and filter matched, do not scrub */
+		return s;
+	}
+	return memset(s, c, n);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int  opt;
+	int  do_stats = 0;
+	//int  do_debug = 0;
+	char *logfn = NULL;
+
+	/* point either to anon or unanon (-r) functions */
+	static uint32_t	(*scrambler_ip4)(uint32_t, int) 	 = scramble_ip4;
+	static void	(*scrambler_ip6)(struct in6_addr *, int) = scramble_ip6;
+
+
+#define PASS4	  256
+#define PASS6	  257
+#define NOCKSUM   258
+#define VERBOSE   259
+#define OPT_PNAT  260
+#define OPT_DAG   261
+#define OPT_PCAP  262
+#define OPT_NOSCRAMBLE  263
+
+	struct option long_options[] = {
+		{"help",  0, NULL, 'h'},
+		{"pass4", 1, NULL, PASS4},
+		{"pass6", 1, NULL, PASS6},
+		{"nocksum", 0, NULL, NOCKSUM},
+		{"verbose", 0, NULL, VERBOSE},
+                {"pnat", 1, NULL, OPT_PNAT},
+                {"no-scramble", 1, NULL, OPT_NOSCRAMBLE},
+                {"dont-scramble", 1, NULL, OPT_NOSCRAMBLE},
+                {"pcap", 0, NULL, OPT_PCAP},
+                {"dag", 0, NULL, OPT_DAG},
+                {"erf", 0, NULL, OPT_DAG},
+
+	};
+	prog = argv[0];
+	while((opt = getopt_long(argc, argv, 
+				 "DF:L:MPRSW:chl:mn:rs:v",
+				 long_options, NULL)) != EOF) {
+		switch(opt) {
+			/* long options first: */
+		case PASS4:
+			pass_bits4 = atoi(optarg);
+			if (pass_bits4 < 0 || pass_bits4 > 32)
+				panic("--pass4 option argument must be within [0..32]\n");
+			break;
+		case PASS6:
+			pass_bits6 = atoi(optarg);
+			if (pass_bits6 < 0 || pass_bits6 > 128)
+				panic("--pass4 option argument must be within [0..128]\n");
+			break;
+                case OPT_PNAT:
+                        do_pnat = optarg;
+                        break;
+		case NOCKSUM:
+			++nocksum;
+			break;
+		case VERBOSE:
+			++do_warnings;
+			break;
+
+			/* short options: */
+//		case 'D':
+//			do_debug = 1; /* for now does nothing */
+//			break;
+		case 'F':
+			pass_filter_expr = optarg;
+			break;
+		case 'L':
+			/* dump freaky packets in here */
+			logdump = optarg;
+			f_logdump = fopen(logdump, "a");
+			if (f_logdump == NULL)
+				error("cannot open the log dump file %s: %s\n",
+				      logdump, strerror(errno));
+			break;
+		case 'M':
+			++do_ts_increase; /* skip over records to maintain 
+					     monotonously increasing TS */ 
+			break;
+		case 'P': /* fallthrough */
+		case OPT_PCAP:
+			do_pcap = 1;	 /* Use pcap for input/output */
+			break;
+		case OPT_DAG:
+			do_pcap = 0;	 /* Use erf for input/output */
+			break;
+		case 'R':
+			++repair_damage; /* will try to repair damaged files by
+					    skipping some bytes until what looks 
+					    like a good record */
+			break;
+		case 'S':
+			++do_stats;
+			break;
+		case 'c':
+			++do_chopping;
+			break;
+       	       	case 'h':			    
+			usage();		    
+			/* never returns */
+		case 'l':
+			logfn = optarg;
+			if (freopen(logfn, "a", stderr) == NULL) {
+				error("cannot open the log file %s: %s\n",
+				      logfn,
+				      strerror(errno));
+			}
+			break;
+		case 'm':
+			++do_mac_scramble;
+			break;
+		case 'n':
+			paypass_filter_expr = optarg;
+			break;
+		case 'r':
+			++do_reverse_scramble;
+			scrambler_ip4 = &unscramble_ip4;
+			scrambler_ip6 = &unscramble_ip6;
+			break;
+		case 's':
+			scramble_crypto_fn = optarg;
+			break;
+		case 'v':
+			++do_preserve_vlantags;
+			break;
+		case OPT_NOSCRAMBLE:
+			noscramble_prefixes = optarg;
+			break;
+		default:
+			panic("unknown option, see -h for help on usage\n");
+			/* never returns */
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	fi = (argc > 0 && argv[0]) ? argv[0] : NULL;
+	fo = (argc > 1 && argv[1]) ? argv[1] : NULL;
+	
+	if (fi) {
+		if ((f_input = fopen(fi, "r")) == NULL)
+			panic("cannot open %s: %s\n", fi, strerror(errno));
+	} else {
+		fi = "(stdin)";
+		f_input = stdin;
+	}
+	if (fo) {
+		if ((f_output = fopen(fo, "r")) != NULL) {
+			error("output %s exists, exiting without overwriting\n", fo);
+			exit(1);
+		}
+		if ((f_output = fopen(fo, "w")) == NULL)
+			panic("cannot open %s: %s\n", fo, strerror(errno));
+	} else {
+		fo = "(stdout)";
+		f_output = stdout;
+	}
+        if (do_pnat) {
+                if (scramble_crypto_fn) { 
+                        error("running in PNAT mode, scrambling is disabled\n");
+                        scramble_crypto_fn = NULL;
+                }
+                do_scrambling = 1;
+                keep_payload = 1;
+                build_pnat_tables(do_pnat);
+		scrambler_ip4 = &pnat_ip4;
+		scrambler_ip6 = &pnat_ip6;
+        }
+
+        scramble_wlw_init(noscramble_prefixes, scrambler_ip4, scrambler_ip6);
+
+	if (scramble_crypto_fn) {
+		int do_mac = do_mac_scramble;
+		if (scramble_init_from_file(scramble_crypto_fn, 
+					    SCRAMBLE_BLOWFISH, SCRAMBLE_BLOWFISH, 
+					    &do_mac) < 0) {
+			error("Cannot init crypto scrambling");
+			exit(1);
+		}
+		if (do_mac_scramble && !do_mac) {
+			error("Cannot do MAC scrambling: disabled in keyfile\n");
+			exit(1);
+		}
+		fprintf(stderr,
+			"# Scrambling IP addresses, using crypto state from %s (ipv4:%s, ipv6:%s)\n",
+			scramble_crypto_fn,
+			scramble_type2name(scramble_crypto_ip4()),
+			scramble_type2name(scramble_crypto_ip6()));
+		if (pass_bits4)
+			fprintf(stderr,
+				"# Passing %d bits of ipv4 unchanged\n", pass_bits4);
+		if (pass_bits6)
+			fprintf(stderr,
+				"# Passing %d bits of ipv6 unchanged\n", pass_bits6);
+		fprintf(stderr,
+			"# Scrambling MAC addresses/vlans is %s\n", (do_mac) ? "enabled" : "disabled");
+                do_scrambling = 1;
+	} else {
+		if (pass_bits4 || pass_bits6) 
+			fprintf(stderr, 
+				"# Warning: --pass4 or --pass6 without -s makes no difference\n");
+		if (do_reverse_scramble) {
+			fprintf(stderr,
+				"# Warning: -r makes no sense without -s\n");
+		}
+	}
+
+	parse_init();
+
+	if (pass_filter_expr)
+		init_filter(pass_filter_expr,
+			    &pass_pf,
+			    1500,	/*XXX snaplen? does it matter? */
+			    pcap_dlt);
+	if (paypass_filter_expr)
+		init_filter(paypass_filter_expr,
+			    &paypass_pf,
+			    1500,	/*XXX snaplen? does it matter? */
+			    pcap_dlt);
+
+
+	if (do_pcap)
+		parse_pcap();
+	else
+		parse_erf();
+
+	fprintf(stderr, 
+		"**Read from %s: %" PRIu64 "(%" PRIu64 "B),"
+		"  Written to %s %" PRIu64 "(%" PRIu64 "B), Freaky: %" PRIu64 "\n", 
+		fi, rcount, rbytes, 
+		fo, wcount, wbytes, fcount);
+	
+	if (do_stats) {
+		int i;
+		fprintf(stderr, "**Extended Stats:\n");
+		for (i = 0; i<= MAX_IP_PROTO; ++i) {
+			if (ipsw[i].stats_cnt > 0) {
+				fprintf(stderr, 
+					"**  PROTO: 0x%02x, %*s, total: %20" PRIu64
+					", errors: %20" PRIu64 "\n",
+					i, 
+					MAX_PROTO_NAME, ipsw[i].name, 
+					ipsw[i].stats_cnt, 
+					ipsw[i].stats_err);
+			}
+		}
+	}
+
+	if (f_input)
+		fclose(f_input);
+	if (f_output)
+		fclose(f_output);
+	if (f_logdump)
+		fclose(f_logdump);
+
+	f_input = f_output = f_logdump = NULL;
+
+	fclose(stderr);
+
+	return 0;
+}
+
+#define REPAIR_ERF_LOOKAHEAD		4096 /* seek a good record 
+						within so many bytes */
+/* this (stronger version, works if corruption happened in the mid of the file */
+#define ERF_REC_HEURISTIC_NEXT(oldrec, newrec)					\
+            (((((oldrec)->ts ^ (newrec)->ts) >> 48) == 0) /* within 18hrs */	\
+	 && ((oldrec)->type == (newrec)->type)					\
+	 && ((int)ntohs((newrec)->rlen) < 1600)	     /* not too large */ \
+	 && ((int)ntohs((newrec)->rlen) >= (int)sizeof(dag_record_t))/* nor too small */ \
+	 && ((int)ntohs((newrec)->wlen) < 2000)				\
+	 && ((int)ntohs((newrec)->wlen) >				\
+	     (int)ntohs((newrec)->rlen) - (int)sizeof(dag_record_t)))
+/* this (weaker) version will have to be used if it's the first record
+   that's busted */
+#define ERF_REC_HEURISTIC_FIRST(newrec)						\
+	(((int)ntohs((newrec)->rlen) < 1600)		     /* not too large */ \
+	 && ((int)ntohs((newrec)->rlen) >= (int)sizeof(dag_record_t))/* nor too small */ \
+	 && ((int)ntohs((newrec)->wlen) < 2000)					\
+	 && ((int)ntohs((newrec)->wlen) > 						\
+	     (int)ntohs((newrec)->rlen) - (int)sizeof(dag_record_t)))
+/* all in one */
+#define ERF_REC_HEURISTIC(oldrec, newrec)		\
+	((oldrec) == NULL				\
+	 ? ERF_REC_HEURISTIC_FIRST(newrec)		\
+	 : ERF_REC_HEURISTIC_NEXT(oldrec, newrec))
+
+static int
+repair_erf(int prev_buf_dex, int bad_read) {
+	/* we have the last record */
+	dag_record_t *prev_rec = NULL;
+	dag_record_t rec;
+	char buf[REPAIR_ERF_LOOKAHEAD];
+	int buflen = 0;
+	int off;
+	int bufs = -1;
+	int matches = 0;
+
+	/* negative prev_buf_dex, means the buffer is not available */
+	if (prev_buf_dex >= 0)
+		prev_rec = (dag_record_t *)parse_buf[prev_buf_dex];
+
+	if (fseek(f_input, (long)-bad_read, SEEK_CUR) != 0) {
+		error("Cannot lseek to the end of previous record: %s\n", strerror(errno));
+		return -1; /* something went wrong */
+	}
+	do {
+		++bufs;
+		errno = 0;
+		buflen = fread(buf, 1, REPAIR_ERF_LOOKAHEAD, f_input);
+		if (buflen == 0) {
+			error("EOF while repairing (or error: %s), skipped last %d bytes\n",
+			      strerror(errno), bufs*REPAIR_ERF_LOOKAHEAD);
+			/* we did our best */			
+			return 0;
+		}
+		/* all this memcpy's aren't very efficient, but hopefully we don't have to
+		 * do it very often */
+		for (off = 0; off + (int)sizeof(rec) < buflen; ++off) {
+			memcpy(&rec, buf + off, sizeof(rec));
+			/* heuristic to find a valid record */
+			if (ERF_REC_HEURISTIC(prev_rec, &rec)) {
+				/* this looks like a record */
+				/* let's make sure a few following records look good too */
+				dag_record_t r = rec;
+				dag_record_t pr;
+				int len = ntohs(rec.rlen);
+				for (matches = 1; matches < 5; ++matches) {
+					if (off + len + (int)sizeof(r) >= buflen)
+						break;
+					pr = r;
+					memcpy(&r, buf + off + len, sizeof(r));
+					if (!ERF_REC_HEURISTIC(&pr, &r)) {
+						matches = 0;
+						break;
+					}
+					len += ntohs(r.rlen);
+				}
+				if (matches)
+					break;
+			}
+		}
+	} while (matches == 0);
+	{
+		int64_t   dts  = 0;
+		uint64_t  adts = 0;
+		uint32_t  ds = 0;
+		uint32_t  df = 0;
+		if (prev_rec) {
+			dts = TS(rec.ts) - TS(prev_rec->ts);
+			adts = (dts < 0) ? -dts : dts;
+			ds = adts >> 32;
+			df = adts & 0xffffffff;
+		}
+		fprintf(stderr, 
+			"Repair: found %d good(?) records, skipping %d bytes, "
+			"timestamp diff: %c0x%" PRIx32 ".%08" PRIx32 "\n",
+			matches, bufs*REPAIR_ERF_LOOKAHEAD + off,
+			dts < 0 ? '-' : '+',
+			ds, df);
+	}
+	/* reposition the file to the beginning of a good record */
+	if (fseek(f_input, (long)(off-buflen), SEEK_CUR) != 0) {
+		error("Repair: cannot reposition file to the new good record: %s\n", 
+		      strerror(errno));
+		return -1;
+	}
+	return 0;
+}
+
+static void
+pcap_callback(u_char *null, 
+	      const struct pcap_pkthdr *h,
+	      const u_char *bytes)
+{
+	struct pcap_pkthdr nh = *h;
+	parse_ret_t ret;
+	
+	++rcount;
+	rbytes += h->caplen;
+
+	/* anonymizing */
+
+        if (pcap_linktype == DLT_RAW)
+                ret = parse_raw((u_char*)bytes, h->caplen, h->len, pcap_linktype);
+        else
+                ret = parse_eth((u_char*)bytes, h->caplen, h->len, pcap_linktype);
+
+	if (ret.cond == PARSE_COND_ERROR) {
+		++fcount;
+		if (f_logdump != NULL)
+			pcap_dump((u_char*)pcap_logdumper, &nh, bytes);
+	}
+	if (ret.cond != PARSE_COND_SKIP) {
+		/* write output */
+		if (do_chopping && !keep_payload) {
+			assert(ret.chop_tail >= 0 && ret.chop_tail <= h->caplen);
+			nh.caplen -= ret.chop_tail;
+		}
+		if (nh.caplen > 0)
+			pcap_dump((u_char*)pcap_dumper, &nh, bytes);
+
+		++wcount;
+		wbytes += nh.caplen;
+	}
+}
+
+static void
+parse_pcap(void)
+{
+	char errbuf[PCAP_ERRBUF_SIZE];
+	int ret = 0;
+	pcap_t *pcap = NULL;
+
+	if ((pcap = pcap_fopen_offline(f_input, errbuf)) == NULL) {
+		error("Error opening pcap input: %s\n", errbuf);
+		return;
+	}
+
+	pcap_linktype = pcap_datalink(pcap); 
+
+	if ((pcap_dumper = pcap_dump_fopen(pcap, f_output))
+	    == NULL) {
+		error("Error opening pcap output: %s\n", pcap_geterr(pcap));
+		return;
+	}
+
+	if (f_logdump) {
+		if ((pcap_logdumper = pcap_dump_open(pcap, logdump))
+		    == NULL) {
+			error("Error opening pcap freakdump: %s\n", pcap_geterr(pcap));
+			return;
+		}
+	}
+	
+
+	ret = pcap_loop(pcap, -1, pcap_callback, NULL);
+	
+	if (ret == -1)
+		error("Error processing pcap input: %s\n",
+		      pcap_geterr(pcap));
+
+	/* close dumpers */
+	pcap_dump_close(pcap_dumper);
+	if (f_logdump) 
+		pcap_dump_close(pcap_logdumper);
+	pcap_close(pcap);
+
+	/* don't need to close these files again */
+	f_input = f_output = f_logdump = NULL;
+}
+
+static void
+parse_erf(void)
+{
+	dag_record_t	*rec; /*  = (dag_record_t *)parse_buf[parse_buf_dex ^= 1]; */
+	ts_stats_t	ts_stats[ERF_FLAGS_IFACE_MAX+1];
+	int		prev_buf_dex;
+	int		lctr, loss_overflowed = 0;
+	int		i, xlen = 0;
+	int		first_record = 1;
+
+	/* reset stats */
+	for (i = 0; i<ERF_FLAGS_IFACE_MAX+1; ++i) {
+		ts_stats[i].not_increasing = 0;
+		ts_stats[i].first_record = 1;
+		ts_stats[i].diff_max = 0;
+		ts_stats[i].min_ts = ~(0ULL);
+		ts_stats[i].max_ts = 0;
+	}
+
+	for (;;) {
+		unsigned short rlen, wlen;
+		int read_bytes;
+		parse_ret_t ret;
+
+		int l = fread((rec = (dag_record_t *)parse_buf[parse_buf_dex ^= 1]),
+			  sizeof(dag_record_t), 1, f_input);
+		if (l != 1) {
+			if (l < 0)
+				panic("problem reading input: %s\n", strerror(ferror(f_input)));
+			break;
+		}
+
+		rlen = ntohs(rec->rlen);
+		wlen = ntohs(rec->wlen);
+		read_bytes = sizeof(dag_record_t);
+
+		xlen = rlen - sizeof(dag_record_t);
+
+		if (xlen < 0) {
+			error("record too short on input\n");
+			goto try_repair;
+		}
+		/* read the remainder */
+		if ((l = fread(rec + 1, xlen, 1, f_input)) != 1) {
+			error("unexpected end of file");
+			if ((errno=ferror(f_input)) != 0)
+				fprintf(stderr, ": %s", strerror(errno));
+			fprintf(stderr, "\n");
+			break;
+		}
+
+		read_bytes = rlen;
+
+		/* early check for validity of record type to possibly repair */
+		if (rec->type != DAG_RECORD_TYPE_ETH) {
+			/* the only supported record type */
+			error("unsupported link type %d\n", rec->type);
+			goto try_repair;
+		}
+		/* check that lengths make sense */
+		if (xlen > wlen) {
+			/* It's OK, this is just pad */
+		}
+
+		/* assume first record is OK */
+		first_record = 0;
+
+		/* work with timestamps: already in little endian byte order */
+		{
+			int iface = rec->flags.iface;
+			uint64_t ts = TS(rec->ts);
+
+			assert(iface < ERF_FLAGS_IFACE_MAX+1);
+			
+			if (ts_stats[iface].first_record) {
+				ts_stats[iface].first_record = 0;
+			} else {
+				if (ts_stats[iface].prev_ts > ts) {
+					if (do_ts_increase) {
+						uint64_t dts = ts_stats[iface].prev_ts - ts;
+						fprintf(stderr, 
+							"Monotonously increasing TS enforced, "
+							"skipping over dTS=-0x%" PRIx32 ".%08" PRIx32 ", IF=%d\n",
+							(uint32_t)(dts >> 32),
+							(uint32_t)(dts & 0xffffffff),
+							iface);
+						continue;
+					}
+					ts_stats[iface].not_increasing = 1;
+				} else
+					ts_stats[iface].diff_max = 
+						max(ts_stats[iface].diff_max, 
+						    ts - ts_stats[iface].prev_ts);
+			}
+			ts_stats[iface].prev_ts = ts;
+			if (ts < ts_stats[iface].min_ts)
+				ts_stats[iface].min_ts = ts;
+			if (ts > ts_stats[iface].max_ts)
+				ts_stats[iface].max_ts = ts;
+		}
+
+		++rcount;
+		rbytes += rlen;
+		
+		if (rec->lctr) {
+			lctr = ntohs(rec->lctr);
+			loss += lctr;
+			if (lctr == 0xffff)
+				loss_overflowed = 1;
+
+		}
+
+		ret = parse_link(rec + 1, xlen, wlen, -DAG_RECORD_TYPE_ETH);
+		
+		if (ret.cond == PARSE_COND_ERROR) {
+			++fcount;
+			if (f_logdump != NULL) {
+				if (fwrite(rec, rlen, 1, f_logdump) != 1)
+					error("cannot write freakdump - %s\n", 
+					      strerror(ferror(f_logdump)));
+			}
+		}
+		if (ret.cond != PARSE_COND_SKIP) {
+			unsigned short w_len = rlen;	
+			/* write output */
+			if (do_chopping && !keep_payload) {
+				assert(ret.chop_tail >= 0 && ret.chop_tail < xlen);
+				if (w_len < (int)sizeof(dag_record_t) + ret.chop_tail) {
+					continue; /* skip this, but == is OK */
+				} else {
+					w_len -= ret.chop_tail;
+				}
+				rec->rlen = htons(w_len);
+			} /*xxx memset to zero here */
+			
+			if (fwrite(rec, w_len, 1, f_output) != 1)
+				panic("cannot write output: %s\n", strerror(ferror(f_output)));
+			++wcount;
+			wbytes += w_len;
+		}
+		continue;
+	try_repair:
+		if (!repair_damage) {
+			fprintf(stderr, "Panic: try running in repair mode [-R]\n");
+			exit(1); /* this is fatal */
+		}
+
+		prev_buf_dex = (first_record) ? -1 : (parse_buf_dex ^ 1);
+		if (repair_erf(prev_buf_dex,read_bytes) != 0)
+			panic("Tried to repair, but wasn't successful\n");
+		/* revert to the old value */
+		parse_buf_dex ^= 1;
+	}
+
+	for (i = 0; i<ERF_FLAGS_IFACE_MAX+1; ++i) {
+		if (ts_stats[i].first_record == 0) {
+			uint64_t dts = ts_stats[i].max_ts - ts_stats[i].min_ts;
+			uint32_t ds = (dts >> 32);	  /* seconds */
+			uint32_t df = (dts & 0xffffffff); /* fractional seconds */
+			fprintf(stderr, 
+				"**IF=%d: Trace Time: 0x%" PRIx32 ".%08" PRIx32 ", Max timestamp diff: 0x%"
+				PRIx32 ".%08" PRIx32 ", "
+				"montonically increasing: %s\n",
+				i,
+				ds, df,
+				(uint32_t)(ts_stats[i].diff_max >> 32), 
+				(uint32_t)(ts_stats[i].diff_max & 0xffffffff),
+				(ts_stats[i].not_increasing) ? "NO" : "YES");
+		}
+	}
+	fprintf(stderr, "**Total losses within the file %s %" PRIu64 "\n", 
+		(loss_overflowed) ? ">=" : "=", loss);
+}
+
+static parse_ret_t
+parse_link(void *p, int len, int wlen, int type)
+{
+	switch (type) {
+	case -DAG_RECORD_TYPE_ETH:
+		return parse_erf_eth(p, len, wlen, DAG_RECORD_TYPE_ETH);
+
+	case DLT_EN10MB:
+		return parse_eth(p, len, wlen, type);
+
+	default:
+		panic("unsupported link type %d\n", type);
+	}
+	/* notreached */
+	error("parse_link() notreached\n");
+	return PARSE_ERROR;
+}
+
+inline static
+parse_ret_t call_parser(void *p, int len, int proto) {
+	parse_ret_t ret;
+	assert(proto >= 0 && proto <= MAX_IP_PROTO);
+
+	if (len < 0)
+		return PARSE_SHORT;
+	else if (len == 0)
+		return PARSE_OK;
+	else {
+		if (ipsw[proto].parser == NULL) {
+			/* not supposed to happen: default handler is set for everyone */
+			error("no default parser for proto %d\n", proto);
+			abort();
+		}
+		++ipsw[proto].stats_cnt;
+		
+		ret = (ipsw[proto].parser)(p, len, proto);
+		
+		if (ret.cond == PARSE_COND_ERROR) {
+			++ipsw[proto].stats_err;
+		}
+		
+		return ret;
+	}
+}	
+
+static parse_ret_t
+parse_eth(void *p, int len, int wlen, int type)
+{
+	parse_ret_t ret;
+	unsigned short etype;
+	u_char *lh = (u_char *)p;
+	u_char *nh = NULL; /*next hdr */
+	eth_hdr_t *eth_hdr = (eth_hdr_t *)p;
+	int unicast_dst = ! IS_ETHER_MCAST(eth_hdr->dst);
+	int silent = 0;
+
+	if (len < (int)offsetof(eth_hdr_t, eth_pload)) {
+		warn("eth header truncated: %d\n", len);
+		cond_memset(p, 0, len);
+		return PARSE_SHORT;
+	}
+
+	/* scramble eth_hdr->src, eth_hdr->dst addresses */
+	SCRAMBLE_ETHER_ADDR(eth_hdr->src);
+	if (unicast_dst) {
+		/* scramble only if dst is unicast */
+		SCRAMBLE_ETHER_ADDR(eth_hdr->dst);
+	}
+
+	etype = ntohs(eth_hdr->etype);
+	nh = eth_hdr->eth_pload;
+	/* skip VLAN tag if present */
+	if (etype == ETHERTYPE_8021Q) {
+		etype = ntohs(eth_hdr->vlan_etype);
+		nh = eth_hdr->vlan_pload;
+
+		if (!do_preserve_vlantags)
+			SCRAMBLE_ETHER_VLAN(eth_hdr->vlan_tag);
+ 	}
+
+	len -= (nh-lh);
+	
+	if (len < 0) return PARSE_SHORT; /* does not happen b/c of the above */
+
+	if (pass_filter_expr &&
+	    !run_filter(&pass_pf, nh, len, wlen)) {
+		/* if doing filtering and filter didn't match, skip this packet */
+		return PARSE_SKIP;
+	}
+	keep_payload = (paypass_filter_expr)?run_filter(&paypass_pf, nh, len, wlen):0;
+	
+	switch (etype) {
+	case ETHERTYPE_IP:
+		return call_parser(nh, len, PARSE_IP4);
+
+	case ETHERTYPE_IP6:
+		return call_parser(nh, len, PARSE_IP6);
+		
+	case ETHERTYPE_ARP:
+	case ETHERTYPE_REVARP:
+		cond_memset(nh, 0, len);
+		ret.cond = PARSE_COND_OK;
+		ret.chop_tail = len;
+		return ret;
+	case ETHERTYPE_RESERVED: /* pass through */
+		ret.cond = PARSE_COND_OK;
+		ret.chop_tail = 0;
+		return ret;
+	case ETHERTYPE_LOOPBACK:
+		silent = 1;
+		/* fallthrough */
+	default:
+		cond_memset(nh, 0, len);
+		ret.chop_tail = len;
+		ret.cond = PARSE_COND_OK;
+
+		/* be silent if BPDU */
+		if (unicast_dst && !silent) {
+			error("unknown ether type: 0x%04x\n", etype);
+			cond_memset(p, 0, len);
+			ret.chop_tail = len;
+			ret.cond = PARSE_COND_ERROR;
+			return ret;
+		}
+
+		return ret;
+	}
+	/* not reached */
+}
+
+/* Ether frames are followed by FCS (checksum 4 byte field) */
+#define ETHERNET_FCS_BYTES	4
+#define ETHERNET_WLEN(wlen)	(wlen - ETHERNET_FCS_BYTES)
+
+static parse_ret_t
+parse_erf_eth(void *p, int len, int wlen, int type)
+{
+	parse_ret_t ret;
+	erf_eth_rec_t *eth_rec = (erf_eth_rec_t *)p;
+	size_t overcapture = 0; /* this may include captured bytes of eth checksum:
+				   between 0 and ETHERNET_FCS_BYTES followed by pad */
+	int eth_wlen = ETHERNET_WLEN(wlen);
+
+	len -= offsetof(erf_eth_rec_t, eth_hdr); /* -= 2 */
+
+	if (len > eth_wlen) {
+		overcapture = len - eth_wlen;
+		assert(overcapture > 0);
+		//assert(overcapture <= ETHERNET_FCS_BYTES);
+		memset((u_char*)&eth_rec->eth_hdr + eth_wlen, 0, overcapture);
+		len = eth_wlen;
+	}
+
+
+	ret = parse_eth(&eth_rec->eth_hdr, len, eth_wlen, type);
+	/* if chopping, remove the ether cksum at the end */
+	ret.chop_tail += overcapture;
+	return ret;
+}
+
+static void
+parse_init(void)
+{
+	int i;
+
+	memset(ipsw, 0, sizeof(ipsw));
+
+	for (i = 0; i <= MAX_IP_PROTO; ++i) {
+		ipsw[i] = 
+ 			(IS_UNASS_IP_PROTO(i)) 
+			? (ipprotosw_t){ parse_defaulterr, 0, 0, "UNASSIGNED" } 
+			: (ipprotosw_t){ parse_defaulterr, 0, 0, "UNSUPP" };
+	}
+
+	ipsw[IPPROTO_IPIP] 	= (ipprotosw_t){ parse_ipv4, 0, 0, "IPv4" };
+	ipsw[IPPROTO_IPV6] 	= (ipprotosw_t){ parse_ipv6, 0, 0, "IPv6" };
+
+	ipsw[IPPROTO_ICMP] 	= (ipprotosw_t){ parse_icmp4, 0, 0, "ICMP"   };
+	ipsw[IPPROTO_ICMPV6]= (ipprotosw_t){ parse_icmp6, 0, 0, "ICMPv6" };
+
+	ipsw[IPPROTO_TCP] 	= (ipprotosw_t){ parse_tcp, 0, 0, "TCP" };
+	ipsw[IPPROTO_UDP] 	= (ipprotosw_t){ parse_udp, 0, 0, "UDP" };
+	ipsw[IPPROTO_ESP]	= (ipprotosw_t){ parse_esp, 0, 0, "ESP" };
+	ipsw[IPPROTO_GRE]	= (ipprotosw_t){ parse_gre, 0, 0, "GRE" };
+	ipsw[IPPROTO_AH]	= (ipprotosw_t){ parse_ah,  0, 0, "AH" };
+
+	/* ipv6 options */
+	ipsw[IPPROTO_HOPOPTS]	= (ipprotosw_t){ parse_ipv6_opt, 0, 0, "IPv6-HOP"  };
+	ipsw[IPPROTO_ROUTING]	= (ipprotosw_t){ parse_ipv6_opt, 0, 0, "IPv6_ROUT" };
+	ipsw[IPPROTO_FRAGMENT]	= (ipprotosw_t){ parse_ipv6_opt, 0, 0, "IPv6_FRAG" };
+	ipsw[IPPROTO_DSTOPTS]	= (ipprotosw_t){ parse_ipv6_opt, 0, 0, "IPv6_DEST" };
+
+	/* remove everything silently for the following: */
+	ipsw[IPPROTO_NONE]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "IPv6_NONE" };
+	ipsw[IPPROTO_EIGRP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "EIGRP" };
+	ipsw[IPPROTO_IGP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "IGP"   };
+	ipsw[IPPROTO_RSVP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "RSVP"  };
+	ipsw[IPPROTO_OSPFIGP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "OSPFIGP"  };
+#ifndef IPPROTO_VRRP
+#define IPPROTO_VRRP 112
+#else
+#if IPPROTO_VRRP != 112
+#error VRRP != 112
+#endif
+#endif
+	ipsw[IPPROTO_VRRP]      = (ipprotosw_t){ parse_zerowhole, 0, 0, "VRRP"  };
+
+	/* for now, just kill the payload; want to revisit for IGMP and PIM xxx */
+	ipsw[IPPROTO_IGMP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "IGMP"   };
+	ipsw[IPPROTO_PIM]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "PIM"    };
+	ipsw[IPPROTO_IPMP]	= (ipprotosw_t){ parse_zerowhole, 0, 0, "IPMP"};
+	ipsw[IPPROTO_TESTING_253_RFC3692]
+				= (ipprotosw_t){ parse_zerowhole, 0, 0, "TESTING_253"  };
+}
+
+/* Checksum adjustment function, optimized to some extent;
+ * byte order is unimportant, as long as it is all the same;
+ * see RFC 1624 and  RFC 1071 for details. 
+ */
+static inline uint16_t
+cksum_adjust(uint32_t sum, uint32_t oldip, uint32_t newip)
+{
+	if (nocksum || oldip == newip) return sum;
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+	/* make use of ADDC */
+	asm volatile ("\t not  %0"	: "+r" (sum));
+	asm volatile ("\t not  %0"	: "+r" (oldip));
+	asm volatile ("\t addl %1,%0"	: "+r" (sum) : "g" (oldip));
+	asm volatile ("\t adcl %1,%0"	: "+r" (sum) : "g" (newip));
+	asm volatile ("\t adcl $0,%0"	: "+r" (sum));
+#else
+	sum ^= 0xffff;
+	oldip = ~oldip;
+	sum += (old & 0xffff) + (oldip >> 16);
+	sum += (new & 0xffff) + (newip >> 16);
+#endif
+	sum = (sum & 0xffff) + (sum >> 16);
+	if (sum & 0xffff0000) 
+		++sum;
+	return ((~sum) & 0xffff); /* (~s) & 0xffff */
+}
+
+static parse_ret_t
+parse_raw(void *p, int len, int wlen, int type)
+{
+	parse_ret_t ret;
+ 
+	if (len < 0) return PARSE_SHORT; /* does not happen b/c of the above */
+ 
+	if (pass_filter_expr &&
+	    !run_filter(&pass_pf, p, len, wlen)) {
+		/* if doing filtering and filter didn't match, skip this packet */
+		return PARSE_SKIP;
+	}
+	keep_payload = (paypass_filter_expr)?run_filter(&paypass_pf, p, len, wlen):0;
+
+	struct iphdr *iph = (struct iphdr *)p;
+	switch (iph->version) {
+	case 4:
+		return call_parser(p, len, PARSE_IP4);
+	case 6:
+		return call_parser(p, len, PARSE_IP6);
+	default:
+		cond_memset(p, 0, len);
+		ret.chop_tail = len;
+		ret.cond = PARSE_COND_OK;
+
+		error("unknown ip version: %d\n", iph->version);
+		cond_memset(p, 0, len);
+		ret.chop_tail = len;
+		ret.cond = PARSE_COND_ERROR;
+
+		return ret;
+	}
+	/* not reached */
+}
+
+
+static parse_ret_t
+parse_ipv4(void *p, int len, int proto) {
+	struct iphdr *iph = (struct iphdr *)p;
+	parse_ret_t ret;
+	int next_proto, iphlen, foff, iplen;
+	int pad = 0;
+
+	if (len < (int)sizeof(struct iphdr)) {
+		warn("ipv4 header truncated1\n");
+		/* there may be an address leak here.  Wipe it clean, 
+		   because tcpdpriv won't handle it */
+		memset(p, 0, len);
+		ret.cond = PARSE_COND_SHORT;
+		ret.chop_tail = len;
+		return ret;
+	}
+
+	if (iph->version != 4) {
+		error("expected ipv4, but got ipv%d\n", iph->version);
+		return PARSE_ERROR; /* malformed packet, keep */
+	}
+
+	next_proto = iph->protocol;
+	iphlen = iph->ihl << 2;
+
+	iplen = ntohs(iph->tot_len);
+	if (len >= iplen) {
+		pad = len - iplen;
+		len = iplen;
+	}
+	ip_hdr_cksum_adj = 0;
+	if (do_scrambling) {
+		uint32_t old_src = iph->saddr;
+		uint32_t old_dst = iph->daddr;
+
+		iph->saddr = scramble_wlw_v4(old_src, pass_bits4);
+		iph->daddr = scramble_wlw_v4(old_dst, pass_bits4);
+		/* checksum adjustment is needed only if we have whole header */
+		if (iphlen <= len) {
+			uint16_t ocsum = iph->check;
+			iph->check = cksum_adjust(iph->check, old_src, iph->saddr);
+			iph->check = cksum_adjust(iph->check, old_dst, iph->daddr);
+			/* ip in ip is handled here too, we'll just overwrite
+			   previous pseudo-value with new one */
+			/* since IPPROTO_TCP is the prevalent case, we don't check
+			 * for next_proto being TCP or UDP, and don't expect to
+			 * pay much penalty for this; the absense of this check
+			 * would also make the ICMP_UNREACH hack possible */
+
+			ip_hdr_cksum_adj = cksum_adjust(0, iph->check, ocsum);
+			/* XXX this would also work:
+			 * ip_hdr_cksum_adj = cksum_adjust(0, 
+			 *				   old_src, iph->saddr);
+			 * ip_hdr_cksum_adj = cksum_adjust(ip_hdr_cksum_adj, 
+			 *				   old_dst, iph->daddr);
+			 */
+		} else {
+			iph->check = 0; /* xxx maybe adjust anyway? */
+		}
+	}
+
+	if (iphlen < (int)sizeof(struct iphdr)) {
+		error("ipv4 hdr len is too short: %d\n", iphlen);
+		return PARSE_ERROR; /* malformed packet, keep */
+	}
+
+	if (iphlen > (int)sizeof(struct iphdr)) {
+		/* we've got options, blah... */
+		int optlen = min(iphlen, len) - sizeof(struct iphdr);
+		if (optlen > 0) {
+			parse_ret_t opt_res =
+				parse_ipv4_opt(iph, optlen);
+			if (opt_res.cond != PARSE_COND_OK)
+				memset((u_char *)(iph+1), 0, optlen);
+		}
+	}
+	p = (char *)p + iphlen;
+	len -= iphlen;
+	if (len < 0) {
+		warn("ipv4 header truncated2\n");
+		/* unlike "truncated1", tcpdpriv will handle this */
+		return PARSE_SHORT;
+	}
+
+	if (ipsw[next_proto].parser == parse_ipv6_opt) {
+		error("ipv6 option (0x%02x) in ipv4 pkt\n", next_proto);
+		return PARSE_ERROR; /* malformed packet, keep */
+	}
+
+	foff = ntohs(iph->frag_off);
+	if ((foff & IP_OFFMASK) != 0) {
+		/* fragmented packet, erase payload */
+		ret = parse_zerowhole(p, len, next_proto);
+		ret.chop_tail += pad;
+		return ret;
+	}
+
+	ret = call_parser(p, len, next_proto);
+	ret.chop_tail += pad;
+	return ret;
+}
+
+static parse_ret_t
+parse_ipv4_opt(struct iphdr *iph, int len) {
+	int i, l, t;
+	u_char *opt = (u_char *)(iph+1);
+
+	if (!do_scrambling)
+		return PARSE_OK;
+
+	while (len > 0) {
+		switch (*opt) {
+		case IPOPT_EOL: /* end of list */
+			return PARSE_OK;
+		case IPOPT_NOP:
+			++opt;
+			--len;
+			continue;
+		case IPOPT_RR:		/* record route */
+		case IPOPT_LSRR: 	/* loose source route */
+		case IPOPT_SSRR:	/* strict source route */
+			l = opt[1]; /* length of list */
+			t = opt[2]; /* pointer */
+			
+			if (l < 3) l = 3; /* otherwise an infinite loop may result */
+			if (t > len)
+				t = len;
+			if (t > l)
+				t = l;
+			for (i = 3; i < t; i += sizeof(uint32_t)) {
+				u_char *a = opt + i;
+				uint32_t oldip, newip;
+				memcpy(&oldip, a, sizeof(uint32_t));
+				newip = scramble_wlw_v4(oldip, pass_bits4);
+				memcpy(a, &oldip, sizeof(uint32_t));
+				iph->check = cksum_adjust(iph->check, oldip, newip);
+			}
+			len -= l;
+			opt += l;
+			continue;
+		case IPOPT_SEC:		/* security */
+			l = 11;
+			len -= l;
+			opt += l;
+			continue;
+		case IPOPT_TS:		/* timestamp */
+			l = opt[1];
+			if (l < 4) l = 4; /* otherwise an infinite loop may result */
+			len -= l;
+			opt += l;
+			continue;
+		case IPOPT_SATID:	/* stream id */
+		case IPOPT_RA:		/* router alert */
+			l = 4; /* otherwise an infinite loop may result */
+			len -= l;
+			opt += l;
+			continue;
+		default:
+			error("unknown ipv4 option: 0x%x\n", *opt);
+			return PARSE_ERROR; /* will be zeroed out in parse_ipv4() */
+		}
+	}
+	if (len < 0) 
+		return PARSE_SHORT;
+	return PARSE_OK;
+}
+
+static parse_ret_t
+parse_ipv6(void *p, int len, int proto) {
+	struct ip6_hdr *ip6h = (struct ip6_hdr *)p;
+	parse_ret_t ret;
+	int vers, next_proto;
+
+	if (len < (int)sizeof(struct ip6_hdr)) {
+		warn("ipv6 header truncated1\n");
+		/* there may be an address leak here.  Wipe it clean, 
+		   because tcpdpriv won't handle it */
+		memset(p, 0, len);
+		ret.cond = PARSE_COND_SHORT;
+		ret.chop_tail = len;
+		return ret;
+	}
+
+	vers = (ip6h->ip6_vfc & 0xf0) >> 4;
+
+	if (vers != 6) {
+		error("expected ipv6, but got ipv%d\n", vers);
+		return PARSE_ERROR; /* malformed packet */
+	}
+
+	if (do_scrambling) {
+		scramble_wlw_v6(&ip6h->ip6_src, pass_bits6);
+		scramble_wlw_v6(&ip6h->ip6_dst, pass_bits6);
+		/* TODO: save the adjustment for TCP/UDP pseudo header checksum */
+	}
+	
+	next_proto = ip6h->ip6_nxt;
+	p = (char *)p + sizeof(struct ip6_hdr);
+	len -= (int)sizeof(struct ip6_hdr);
+
+	return call_parser(p, len, next_proto); //ok if len < 0
+}
+
+static parse_ret_t
+parse_icmp4(void *p, int len, int proto) {
+	struct icmphdr *icmph = (struct icmphdr *)p;
+
+	if (!do_scrambling)
+		return PARSE_OK; //not scrambling
+
+	if (len <= offsetof(struct icmphdr, un))
+		return PARSE_SHORT; /* nothing to scramble here */
+
+	switch (icmph->type) {
+	case ICMP_REDIRECT:
+		if (len < offsetof(struct icmphdr, un) + sizeof(icmph->un.gateway)) {
+			memset(&icmph->un.gateway, 0, len-offsetof(struct icmphdr, un));
+			return PARSE_SHORT;
+		}
+		/* scramble gateway address */
+		{
+			uint32_t old = icmph->un.gateway;
+			icmph->un.gateway = scramble_wlw_v4(old, pass_bits4);
+			icmph->checksum = cksum_adjust(icmph->checksum, 
+						       old, icmph->un.gateway);
+		}
+		/* FALLTHROUGH */
+	case ICMP_UNREACH:
+	case ICMP_SOURCE_QUENCH:		
+	case ICMP_TIME_EXCEEDED:
+	case ICMP_PARAMETERPROB:
+		len -= (offsetof(struct icmphdr, un) 
+			+ sizeof(icmph->un.gateway));
+		p = (char *)p + offsetof(struct icmphdr, un) 
+			+ sizeof(icmph->un.gateway);
+		/* TODO: will need to update icmph->checksum to reflect ip scrambling */
+		/* a hack: 	call_parser(p, len, IPPROTO_IPIP);
+		 *		read ip_hdr_cksum_adj and update the checksum */
+		icmph->checksum = 0; /* xxx for now, see above */
+		return call_parser(p, len, IPPROTO_IPIP); /* OK if len < 0 */
+
+	default:
+		return PARSE_OK;
+	}
+
+	return PARSE_OK;
+}
+
+static parse_ret_t
+parse_icmp6(void *p, int len, int proto) {
+	struct icmp6_hdr *icmp6h = (struct icmp6_hdr *)p;
+	
+	if (!do_scrambling)
+		return PARSE_OK;
+
+	if (len <= offsetof(struct icmp6_hdr, icmp6_dataun))
+		return PARSE_SHORT; /* nothing to hide here */
+
+	switch (icmp6h->icmp6_type) {
+	case ICMP6_DST_UNREACH:
+	case ICMP6_PACKET_TOO_BIG:
+	case ICMP6_TIME_EXCEEDED:
+	case ICMP6_PARAM_PROB:
+		len -= offsetof(struct icmp6_hdr, icmp6_dataun);
+		p = (char *)p + offsetof(struct icmp6_hdr, icmp6_dataun);
+		icmp6h->icmp6_cksum = 0; /* xxx for now */
+		return call_parser(p, len, IPPROTO_IPV6); /* TODO: will have to adjust icmp6h->icmp6_cksum */
+#ifndef ND_NEIGHBOR_REDIRECT
+#define ND_NEIGHBOR_REDIRECT	137
+#endif
+	case ND_NEIGHBOR_REDIRECT:
+		len -= offsetof(struct icmp6_hdr, icmp6_dataun);
+		assert(len >= 0); /* because of above */
+		p = (char *)p + offsetof(struct icmp6_hdr, icmp6_dataun);
+		if (len < (int)sizeof(struct in6_addr)) {
+			memset(p, 0, len);
+			return PARSE_SHORT;
+		}
+		scramble_wlw_v6((struct in6_addr *)p, pass_bits6);
+		/* TODO: adjust icmp6h->icmp6_cksum */
+		len -= sizeof(struct in6_addr);
+		p = (char *)p + sizeof(struct in6_addr);
+		/* FALLTHROUGH */
+	case ND_NEIGHBOR_SOLICIT:
+	case ND_NEIGHBOR_ADVERT:
+		if (len < (int)sizeof(struct in6_addr)) {
+			memset(p, 0, len);
+			return PARSE_SHORT;
+		}
+		scramble_wlw_v6((struct in6_addr *)p, pass_bits6);
+		/* TODO: adjust icmp6h->icmp6_cksum */
+		return PARSE_OK;
+#ifndef ICMP6_ECHO_REQUEST
+#define ICMP6_ECHO_REQUEST          128
+#endif
+#ifndef ICMP6_ECHO_REPLY
+#define ICMP6_ECHO_REPLY            129
+#endif
+	case ICMP6_ECHO_REQUEST:
+    case ICMP6_ECHO_REPLY:
+		if (len < offsetof(struct icmp6_hdr, icmp6_dataun))
+			return PARSE_SHORT;
+
+		/* TODO: adjust icmp6h->icmp6_cksum */	
+		icmp6h->icmp6_cksum = 0; /* xxx for now */
+
+		len -= sizeof(struct icmp6_hdr);
+		if (len > 0) {
+			parse_ret_t ret = { .chop_tail = len, .cond = PARSE_COND_OK };
+			p = (char *)p + sizeof(struct icmp6_hdr);
+			memset(p, 0, len);
+			return ret;
+		}
+		return PARSE_SHORT;
+		
+	default:
+		error("unknown icmp6 type (0x%x)\n", icmp6h->icmp6_type);
+		return PARSE_OK;
+	}
+	return PARSE_OK;
+}
+
+static parse_ret_t
+parse_ipv6_opt(void *p, int len, int proto) {
+	struct ip6_ext *ext = (struct ip6_ext *)p;
+	int next_proto;
+	int optlen;
+
+	if (len < (int)sizeof(struct ip6_ext)) {
+		warn("ipv6 option 0x%02x truncated1\n", proto);
+		return PARSE_SHORT;
+	}
+	next_proto = ext->ip6e_nxt;
+	optlen	   = (ext->ip6e_len + 1)*8; /* whole length */
+	
+	switch (proto) {
+	case IPPROTO_HOPOPTS:
+	case IPPROTO_DSTOPTS:
+		{
+			int zlen = min(len, optlen) - (int)sizeof(struct ip6_ext);
+			if (zlen > 0)
+				memset(ext+1, 0, zlen);
+			/* it's OK if len < zlen */
+		}
+		break;
+	case IPPROTO_ROUTING:
+		{
+			struct ip6_rthdr *rh = (struct ip6_rthdr *)p;
+			int zlen = min(len, optlen) - (int)sizeof(struct ip6_rthdr);
+			if (zlen > 0)
+				memset(rh+1, 0, zlen);
+			/* it's OK if len < zlen */
+		}
+		break;
+	case IPPROTO_FRAGMENT:
+		optlen = sizeof(struct ip6_frag); /* fixed size */
+		break;
+	default:
+		error("unknown ipv6 option: 0x%x\n", proto);
+		memset(p, 0, len);
+		return PARSE_ERROR;
+	}
+	len -= optlen;
+	if (len < 0)
+		return PARSE_SHORT;
+	
+	p = ext + 1;
+	p = (char*)p + optlen;
+
+	return call_parser(p, len, next_proto);
+}
+
+static parse_ret_t
+parse_tcp(void *p, int len, int proto) {
+	parse_ret_t ret;
+	struct tcphdr *tcph = (struct tcphdr *)p;
+	char *data;
+	int datalen;
+	int tcphlen;
+
+	if (len < (int)sizeof(struct tcphdr)) {
+		warn("tcp header truncated\n");
+		return PARSE_SHORT;
+	}
+
+	tcphlen = max(sizeof(struct tcphdr), (tcph->doff << 2));
+	if (len < tcphlen) {
+		/* be quiet here */
+		return PARSE_SHORT;
+	}
+
+	datalen = len - tcphlen;
+	if (datalen > 0) {
+		/* wipe-out user's data */
+		data = (char *)p + tcphlen;
+		cond_memset(data, 0, datalen);
+		/* removal of payload invalidates checksum, so
+		 * don't bother to adjust */
+		if (!keep_payload) tcph->check = 0;
+	} else {
+		/* OK, we rolled in all our adjustments into one
+		 * static ip_hdr_cksum_adj.  Now we need to
+		 * add its inversion (or subtract itself).
+		 */
+		tcph->check = cksum_adjust(tcph->check, 
+					   ip_hdr_cksum_adj, 0);
+
+		ip_hdr_cksum_adj = 0; /* not really needed */
+	}
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = datalen;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_udp(void *p, int len, int proto) {
+	parse_ret_t ret;
+	struct udphdr *udph = (struct udphdr *)p;
+	char *data;
+	int datalen;
+	
+	if (len < (int)sizeof(struct udphdr)) {
+		warn("udp header truncated\n");
+		return PARSE_SHORT;
+	}
+
+	datalen = len - (int)sizeof(struct udphdr);
+	data = (char *)p + sizeof(struct udphdr);
+
+	if (datalen > 0) {
+		data = (char *)p + sizeof(struct udphdr);
+		cond_memset(data, 0, datalen);
+		/* removal of payload invalidates checksum, so
+		 * don't bother to adjust */
+		if (!keep_payload) udph->check = 0;
+	} else {
+		/* same as TCP: adjust for pseudo-header renumber */
+		if (udph->check	/* (checksum == 0) == no_check_sum */
+		    && ip_hdr_cksum_adj) {
+			udph->check = cksum_adjust(udph->check, 
+						   ip_hdr_cksum_adj, 0);
+			if (!udph->check)
+				udph->check = ~udph->check;
+
+			ip_hdr_cksum_adj = 0; /* not really needed */
+		}
+	}
+
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = datalen;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_esp(void *p, int len, int proto) {
+	parse_ret_t ret;
+	struct {
+		uint32_t spi; /* only keep these fields */
+		uint32_t seqno;
+		/* variable length: payload data */
+		/* variable length: padding */
+		/* 8 bits: pad length */
+		/* 8 bits: next header */
+		/* variable length: auth data */
+	} esp;
+	len -= (int)sizeof(esp);
+	if (len < 0) {
+		warn("esp header truncated\n");
+		return PARSE_SHORT;
+	}
+	p = (char *)p + sizeof(esp);
+
+	cond_memset(p, 0, len);
+
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = len;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_gre(void *p, int len, int proto) {
+	parse_ret_t ret;
+	struct { /* only keep these fields */
+		uint16_t flags_version;
+		uint16_t protocol;
+		uint16_t cksum;   /* or length in v1 */
+		uint16_t offset;  /* or callid in v1 */
+		uint32_t key;	  /* or seqno  in v1 */
+		uint32_t seqno;   /* or ackno  in v1 */
+		/* variable length: routing info */
+		/* variable length: padding */
+		/* 8 bits: pad length */
+		/* 8 bits: next header */
+		/* variable length: auth data */
+	} gre;
+	len -= (int)sizeof(gre);
+	if (len < 0) {
+		warn("gre header truncated\n");
+		return PARSE_SHORT;
+	}
+	p = (char *)p + sizeof(gre);
+
+	cond_memset(p, 0, len);
+
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = len;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_ah(void *p, int len, int proto) {
+	parse_ret_t ret;
+	struct { /* only keep these fields */
+		uint8_t  nexthdr;
+		uint8_t  length;
+		uint16_t zeros;
+		uint32_t spi;
+		uint32_t seqno;
+		/* variable length: auth data */
+	} ah;
+
+	len -= (int)sizeof(ah);
+
+	if (len < 0) {
+		warn("ah header truncated\n");
+		return PARSE_SHORT;
+	}
+
+	p = (char *)p + sizeof(ah);
+
+	cond_memset(p, 0, len);
+
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = len;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_zerowhole(void *p, int len, int proto) {
+	parse_ret_t ret;
+	if (len > 0)
+		cond_memset(p, 0, len);
+	else
+		len = 0;
+
+	ret.cond = PARSE_COND_OK;
+	ret.chop_tail = len;
+
+	return ret;
+}
+
+static parse_ret_t
+parse_nofurther(void *p, int len, int proto) {
+	/* silently return */
+	return PARSE_OK;
+}
+#if 0
+static parse_ret_t
+parse_unassigned(void *p, int len, int proto) {
+
+	error("Unassigned proto %d\n", proto);
+
+	/* don't scrub */
+	return PARSE_OK;
+}
+#endif
+static parse_ret_t
+parse_defaulterr(void *p, int len, int proto) {
+	parse_ret_t ret;
+
+	error("don't know how to parse proto %d\n", proto);
+
+	if (len > 0) {
+		memset(p, 0, len);
+	} else {
+		len = 0;
+	}
+	ret.cond = PARSE_COND_ERROR;
+	ret.chop_tail = len;
+
+	return ret;
+}
+
+static void
+init_filter(const char *filter_expr, struct bpf_program *fp, int snaplen, int pcap_dlt) 
+{
+	int error;
+        pcap_t *cap = pcap_open_dead(pcap_dlt, snaplen);
+        if (cap == NULL) {
+                panic("pcap_open_dead(%d, %d) failed\n", pcap_dlt, snaplen);
+        }
+	if ((error = pcap_compile(cap, fp, filter_expr, 1 /*optimize*/, 0 /*mask*/)) < 0) {
+		panic("pcap compile error: %s\n", pcap_strerror(error));
+		/* not reached */
+	}
+        pcap_close(cap);
+		
+}
+
+static int
+run_filter(const struct bpf_program *fp, const void *pkt, int plen, int wlen)
+{
+	uint ret = bpf_filter(fp->bf_insns, (const u_char *)pkt, wlen, plen);
+	return (int) ret;
+} 
+
+static void
+panic(const char *fmt, ...)
+{
+	va_list	ap;
+
+	(void)fprintf(stderr, "%s: panic: ", prog);
+	va_start(ap, fmt);
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	exit(1);
+}
+
+static void
+warn(const char *fmt, ...)
+{
+	va_list	ap;
+	if (!do_warnings) return;
+
+	(void)fprintf(stderr, "%s: warning: ", prog);
+	va_start(ap, fmt);
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+static void
+error(const char *fmt, ...)
+{
+	va_list	ap;
+
+	(void)fprintf(stderr, "%s: error: ", prog);
+	va_start(ap, fmt);
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+static void
+build_pnat_tables(char *pnat) 
+{
+        char *saveptr = NULL;
+        char *tok;
+        pnat_ip4_table_t *e4 = NULL; 
+        pnat_ip6_table_t *e6 = NULL; 
+        for (tok = strtok_r(pnat, ",", &saveptr); tok; tok = strtok_r(NULL, ",", &saveptr)) {
+                struct in_addr ip4_from, ip4_to;
+                struct in6_addr ip6_from, ip6_to;
+                char *from_ip, *to_ip;
+                char *sep = index(tok, '-');
+
+                if (sep == NULL) {
+                        error("unparseable pnat mapping: %s missing `-` separator\n", tok);
+                        exit(1);
+                }
+                *sep = '\0';
+                from_ip = tok;
+                to_ip = sep+1;
+                if (inet_pton(AF_INET, from_ip, &ip4_from) == 1) {
+                        //fprintf(stderr, "%s, %x\n", tok, ip4.s_addr); 
+                        if (inet_pton(AF_INET, to_ip, &ip4_to) != 1) {
+                                error("cannot map ip4 (%s) to non-ip4 (%s)\n", from_ip, to_ip);
+                                exit(1);
+                        }
+                        e4 = (pnat_ip4_table_t *)malloc(sizeof(*e4));
+                        e4->ip4_from = ip4_from.s_addr;
+                        e4->ip4_to = ip4_to.s_addr;
+                        e4->next = pnat_ip4_table;
+                        pnat_ip4_table = e4;
+                        continue;
+                }
+                if (inet_pton(AF_INET6, from_ip, &ip6_from) == 1) {
+                        //fprintf(stderr, "%s, %x\n", tok, ip4.s_addr); 
+                        if (inet_pton(AF_INET6, to_ip, &ip6_to) != 1) {
+                                error("cannot map ip6 (%s) to non-ip6 (%s)\n", from_ip, to_ip);
+                                exit(1);
+                        }
+                        e6 = (pnat_ip6_table_t *)malloc(sizeof(*e6));
+                        e6->ip6_from = ip6_from;
+                        e6->ip6_to = ip6_to;
+                        e6->next = pnat_ip6_table;
+                        pnat_ip6_table = e6;
+                        continue;
+                }
+        }
+}
+
+uint32_t
+pnat_ip4(uint32_t ip, int unused)
+{
+        UNUSED(unused);
+        pnat_ip4_table_t *e4;
+        for (e4 = pnat_ip4_table; e4; e4=e4->next) {
+                if (e4->ip4_from == ip) {
+                        return e4->ip4_to;
+                }
+        }
+        return ip;
+}
+void
+pnat_ip6(struct in6_addr *input, int unused) 
+{
+        UNUSED(unused);
+        pnat_ip6_table_t *e6;
+        for (e6 = pnat_ip6_table; e6; e6=e6->next) {
+                if (memcmp(&e6->ip6_from, input, sizeof(*input)) == 0) {
+                        *input = e6->ip6_to;
+                        return;
+                }
+        }
+}
+        
+
+static char usgtxt[] = 
+    "Usage: %s [OPTIONS] [<input trace> [<output trace>]]\n\n"
+    "Options are:\n"
+    "    -F <filter>     process only packets matching <filter>-expression\n"
+    "    -L <freakdump>  save freaky packets in the file <freakdump>\n"
+    "    -M              force monotonously increasing timestamps (may skip over packets)\n"
+    "    -P              use pcap for input/output (default)\n"
+    "    -R              try to repair busted files (will skip some bytes)\n"
+    "    -S              report extended stats at the end\n"
+    "    -a              parse ATM (not supported)\n"
+    "    -c              chop off scrubbed packet tails (to save space)\n"
+    "    -n <filter>     do not zero out payload for packets matching <filter>\n"
+    "    -h              this page\n"
+    "    -l <logfile>    send log to <logfile> (stderr by default)\n"
+    "    -m              enable mac-layer scrambling (depends on the keyfile)\n"
+    "    -r              reverse anonymization using key in -s\n"
+    "    -s <keyfile>    enable ip address scrambling using <keyfile>; <keyfile>\n"
+    "                    <keyfile> is created if doesn't exist\n"
+    "    -v              preserve vlan tags (no scrambling)\n"
+    "    --erf, --dag    use ERF (DAG) format for input/output\n"
+    "    --pass4=<num>   pass <num> higher bits of ipv4 unchanged\n"
+    "    --pass6=<num>   pass <num> higher bits of ipv6 unchanged\n"
+    "    --pnat=<expr>   instead of scrambling use fixed substitutions, expr is comma separated list:\n"
+    "                    e.g. --pnat='1.2.3.4-2.3.4.5,1::-3::'\n"
+    "    --no-scramble=<prefix_list>, --dont-scramble=<prefix_list>\n"
+    "                    do not scramble addresses that fall into the specified <prefix_list>\n"
+    "                    prefixes in <prefix_list> can be separated by commas, semicolons, or spaces\n"
+    "    --nocksum       do not attempt to adjust checksums\n"
+    "    --verbose       print all kinds of warnings\n"
+    "    <input trace>   defaults to stdin\n"
+    "    <output trace>  defaults to stdout, if filename is given and exists, will be appended to\n";
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr, usgtxt, prog);
+	exit(0);
+}
diff --git a/dag_scrubber.spec.in b/dag_scrubber.spec.in
new file mode 100644
index 0000000..31c762d
--- /dev/null
+++ b/dag_scrubber.spec.in
@@ -0,0 +1,36 @@
+Summary: Scrub and NAT networking traces
+Name: @PACKAGE_NAME@
+Version: @PACKAGE_VERSION@ 
+Release: @RELEASE@
+License: GPLv2
+Group: System Environment
+Packager: yuri@isi.edu
+BuildRequires: make gcc libpcap-devel openssl-devel
+Requires: libpcap openssl
+Source: dag_scrubber-%{version}.tar.gz
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+Url: https://ant.isi.edu/software/dag_scrubber
+
+%description
+
+Dag Scrubber is a tool for scrubbing packets of user data and optionally
+doing IP address anonymization. It supports both pcap and ERF format
+("dag", giving the legacy name). 
+
+%prep
+%setup -q
+
+%build
+%configure --prefix=/usr
+%{__make} 
+
+%install
+%{__rm} -rf %{buildroot}
+make install DESTDIR=%{buildroot} INSTALLDIRS=vendor
+
+%clean
+rm -rf %{buildroot}
+
+%files
+%defattr(-, root, root, 0755)
+%{_bindir}/dag_scrubber
diff --git a/patricia.c b/patricia.c
new file mode 100644
index 0000000..b2e949c
--- /dev/null
+++ b/patricia.c
@@ -0,0 +1,1037 @@
+/*
+ * This file is part of Pytricia.
+ * Joel Sommers <jsommers@colgate.edu>
+ * 
+ * Pytricia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Pytricia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Pytricia.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * $Id: patricia.c 6811 2009-07-06 20:41:10Z robin $
+ * Dave Plonka <plonka@doit.wisc.edu>
+ *
+ * This product includes software developed by the University of Michigan,
+ * Merit Network, Inc., and their contributors. 
+ *
+ * This file had been called "radix.c" in the MRT sources.
+ *
+ * I renamed it to "patricia.c" since it's not an implementation of a general
+ * radix trie.  Also I pulled in various requirements from "prefix.c" and
+ * "demo.c" so that it could be used as a standalone API.
+ */
+
+/* From copyright.txt:
+ * 
+ * Copyright (c) 1997, 1998, 1999
+ * 
+ * 
+ * The Regents of the University of Michigan ("The Regents") and Merit Network,
+ * Inc.  All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1.  Redistributions of source code must retain the above 
+ *     copyright notice, this list of conditions and the 
+ *     following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above 
+ *     copyright notice, this list of conditions and the 
+ *     following disclaimer in the documentation and/or other 
+ *     materials provided with the distribution.
+ * 3.  All advertising materials mentioning features or use of 
+ *     this software must display the following acknowledgement:  
+ * This product includes software developed by the University of Michigan, Merit
+ * Network, Inc., and their contributors. 
+ * 4.  Neither the name of the University, Merit Network, nor the
+ *     names of their contributors may be used to endorse or 
+ *     promote products derived from this software without 
+ *     specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+ */
+
+#define COPYRIGHT \
+"This product includes software developed by the University of Michigan, Merit "\
+"Network, Inc., and their contributors."
+
+#include <assert.h> 
+#include <ctype.h> 
+#include <errno.h> 
+#include <math.h> 
+#include <stddef.h> 
+#include <stdio.h> 
+#include <stdlib.h> 
+#include <string.h> 
+#include <sys/types.h> 
+#if defined(_WIN32) || defined(_WIN64)
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#pragma comment(lib, "Ws2_32.lib")
+#else
+#include <arpa/inet.h> 
+#endif
+
+#include "patricia.h"
+
+#define Delete free
+
+/* { from prefix.c */
+
+/* prefix_tochar
+ * convert prefix information to bytes
+ */
+u_char *
+prefix_tochar (prefix_t * prefix)
+{
+	if (prefix == NULL)
+	return (NULL);
+
+	return ((u_char *) & prefix->add.sin);
+}
+
+int 
+comp_with_mask (void *addr, void *dest, u_int mask)
+{
+
+	if ( /* mask/8 == 0 || */ memcmp (addr, dest, mask / 8) == 0) {
+	   	int n = mask / 8;
+	   	int m = ((-1) << (8 - (mask % 8)));
+
+	   	if (mask % 8 == 0 || (((u_char *)addr)[n] & m) == (((u_char *)dest)[n] & m))
+			return (1);
+	}
+	return (0);
+}
+
+
+/* this allows imcomplete prefix */
+int
+my_inet_pton (int af, const char *src, void *dst)
+{
+	if (af == AF_INET) {
+		int i, c, val;
+		u_char xp[4] = {0, 0, 0, 0};
+
+		for (i = 0; ; i++) {
+		c = *src++;
+		if (!isdigit (c))
+		return (-1);
+		val = 0;
+		do {
+		val = val * 10 + c - '0';
+		if (val > 255)
+			return (0);
+		c = *src++;
+		} while (c && isdigit (c));
+			xp[i] = val;
+		if (c == '\0')
+		break;
+			if (c != '.')
+				return (0);
+		if (i >= 3)
+		return (0);
+		}
+	memcpy (dst, xp, 4);
+		return (1);
+#ifdef HAVE_IPV6
+	} else if (af == AF_INET6) {
+		return (inet_pton (af, src, dst));
+#endif /* HAVE_IPV6 */
+	} else {
+#ifndef NT
+	errno = EAFNOSUPPORT;
+#endif /* NT */
+	return -1;
+	}
+}
+
+/* 
+ * convert prefix information to ascii string with length
+ * thread safe and (almost) re-entrant implementation
+ */
+char *
+prefix_toa2x (prefix_t *prefix, char *buff, int with_len)
+{
+	if (prefix == NULL)
+	return ("(Null)");
+	assert (prefix->ref_count >= 0);
+	if (buff == NULL) {
+
+		struct buffer {
+			char buffs[16][48+5];
+			u_int i;
+		} *buffp;
+
+#    if 0
+	THREAD_SPECIFIC_DATA (struct buffer, buffp, 1);
+#    else
+		{ /* for scope only */
+	   static struct buffer local_buff;
+		   buffp = &local_buff;
+	} 
+#    endif
+	if (buffp == NULL) {
+		/* XXX should we report an error? */
+		return (NULL);
+	}
+
+	buff = buffp->buffs[buffp->i++%16];
+	}
+	if (prefix->family == AF_INET) {
+	u_char *a;
+	assert (prefix->bitlen <= 32);
+	a = prefix_touchar (prefix);
+	if (with_len) {
+		snprintf (buff, 64, "%d.%d.%d.%d/%d", a[0], a[1], a[2], a[3],
+			 prefix->bitlen);
+	}
+	else {
+		snprintf (buff, 64, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
+	}
+	return (buff);
+	}
+#ifdef HAVE_IPV6
+	else if (prefix->family == AF_INET6) {
+	char *r;
+	r = (char *) inet_ntop (AF_INET6, &prefix->add.sin6, buff, 48 /* a guess value */ );
+	if (r && with_len) {
+		assert (prefix->bitlen <= 128);
+		snprintf (buff+strlen(buff), 64-strlen(buff), "/%d", prefix->bitlen);
+	}
+	return (buff);
+	}
+#endif /* HAVE_IPV6 */
+	else
+	return (NULL);
+}
+
+/* prefix_toa2
+ * convert prefix information to ascii string
+ */
+char *
+prefix_toa2 (prefix_t *prefix, char *buff)
+{
+	return (prefix_toa2x (prefix, buff, 0));
+}
+
+/* prefix_toa
+ */
+char *
+prefix_toa (prefix_t * prefix)
+{
+	return (prefix_toa2 (prefix, (char *) NULL));
+}
+
+prefix_t *
+New_Prefix2 (int family, void *dest, int bitlen, prefix_t *prefix)
+{
+	int dynamic_allocated = 0;
+	int default_bitlen = 32;
+
+#ifdef HAVE_IPV6
+	if (family == AF_INET6) {
+		default_bitlen = 128;
+	if (prefix == NULL) {
+			prefix = calloc(1, sizeof (prefix6_t));
+		dynamic_allocated++;
+	}
+	memcpy (&prefix->add.sin6, dest, 16);
+	}
+	else
+#endif /* HAVE_IPV6 */
+	if (family == AF_INET) {
+		if (prefix == NULL) {
+#ifndef NT
+			prefix = calloc(1, sizeof (prefix4_t));
+#else
+			//for some reason, compiler is getting
+			//prefix4_t size incorrect on NT
+			prefix = calloc(1, sizeof (prefix_t)); 
+#endif /* NT */
+		
+			dynamic_allocated++;
+		}
+		memcpy (&prefix->add.sin, dest, 4);
+	}
+	else {
+		return (NULL);
+	}
+
+	prefix->bitlen = (bitlen >= 0)? bitlen: default_bitlen;
+	prefix->family = family;
+	prefix->ref_count = 0;
+	if (dynamic_allocated) {
+		prefix->ref_count++;
+   }
+/* fprintf(stderr, "[C %s, %d]\n", prefix_toa (prefix), prefix->ref_count); */
+	return (prefix);
+}
+
+prefix_t *
+New_Prefix (int family, void *dest, int bitlen)
+{
+	return (New_Prefix2 (family, dest, bitlen, NULL));
+}
+
+/* ascii2prefix
+ */
+prefix_t *
+ascii2prefix (int family, char *string)
+{
+	u_long bitlen = 0, maxbitlen = 0;
+	char *cp = NULL;
+	struct in_addr sin;
+#ifdef HAVE_IPV6
+	struct in6_addr sin6;
+#endif /* HAVE_IPV6 */
+	int result = 0;
+	char save[MAXLINE];
+
+	if (string == NULL)
+		return (NULL);
+
+	/* easy way to handle both families */
+	if (family == 0) {
+	   family = AF_INET;
+#ifdef HAVE_IPV6
+	   if (strchr (string, ':')) family = AF_INET6;
+#endif /* HAVE_IPV6 */
+	}
+
+	if (family == AF_INET) {
+		maxbitlen = 32;
+	}
+#ifdef HAVE_IPV6
+	else if (family == AF_INET6) {
+		maxbitlen = 128;
+	}
+#endif /* HAVE_IPV6 */
+
+	if ((cp = strchr (string, '/')) != NULL) {
+		bitlen = atol (cp + 1);
+		/* *cp = '\0'; */
+		/* copy the string to save. Avoid destroying the string */
+		assert (cp - string < MAXLINE);
+		memcpy (save, string, cp - string);
+		save[cp - string] = '\0';
+		string = save;
+		if (bitlen > maxbitlen)
+			bitlen = maxbitlen;
+		}
+
+		if (family == AF_INET) {
+			if ((result = my_inet_pton (AF_INET, string, &sin)) <= 0)
+				return (NULL);
+			return (New_Prefix (AF_INET, &sin, (int)bitlen));
+		}
+
+#ifdef HAVE_IPV6
+		else if (family == AF_INET6) {
+// Get rid of this with next IPv6 upgrade
+#if defined(NT) && !defined(HAVE_INET_NTOP)
+			inet6_addr(string, &sin6);
+			return (New_Prefix (AF_INET6, &sin6, (int)bitlen));
+#else
+			if ((result = inet_pton (AF_INET6, string, &sin6)) <= 0)
+				return (NULL);
+#endif /* NT */
+			return (New_Prefix (AF_INET6, &sin6, (int)bitlen));
+		}
+#endif /* HAVE_IPV6 */
+		else
+			return (NULL);
+}
+
+prefix_t *
+Ref_Prefix (prefix_t * prefix)
+{
+	if (prefix == NULL)
+	return (NULL);
+	if (prefix->ref_count == 0) {
+	/* make a copy in case of a static prefix */
+		return (New_Prefix2 (prefix->family, &prefix->add, prefix->bitlen, NULL));
+	}
+	prefix->ref_count++;
+/* fprintf(stderr, "[A %s, %d]\n", prefix_toa (prefix), prefix->ref_count); */
+	return (prefix);
+}
+
+void 
+Deref_Prefix (prefix_t * prefix)
+{
+	if (prefix == NULL)
+	   return;
+	/* for secure programming, raise an assert. no static prefix can call this */
+	assert (prefix->ref_count > 0);
+
+	prefix->ref_count--;
+	assert (prefix->ref_count >= 0);
+	if (prefix->ref_count <= 0) {
+		Delete (prefix);
+		return;
+	}
+}
+
+/* } */
+
+/* #define PATRICIA_DEBUG 1 */
+
+static int num_active_patricia = 0;
+
+/* these routines support continuous mask only */
+
+patricia_tree_t *
+New_Patricia (int maxbits)
+{
+	patricia_tree_t *patricia = calloc(1, sizeof *patricia);
+
+	patricia->maxbits = maxbits;
+	patricia->head = NULL;
+	patricia->num_active_node = 0;
+	assert (maxbits <= PATRICIA_MAXBITS); /* XXX */
+	num_active_patricia++;
+	return (patricia);
+}
+
+
+/*
+ * if func is supplied, it will be called as func(node->data)
+ * before deleting the node
+ */
+
+void
+Clear_Patricia (patricia_tree_t *patricia, void_fn1_t func)
+{
+	assert (patricia);
+	if (patricia->head) {
+
+		patricia_node_t *Xstack[PATRICIA_MAXBITS+1];
+		patricia_node_t **Xsp = Xstack;
+		patricia_node_t *Xrn = patricia->head;
+
+		while (Xrn) {
+			patricia_node_t *l = Xrn->l;
+			patricia_node_t *r = Xrn->r;
+
+			if (Xrn->prefix) {
+		Deref_Prefix (Xrn->prefix);
+		if (Xrn->data && func)
+				func (Xrn->data);
+			}
+			else {
+		assert (Xrn->data == NULL);
+			}
+			Delete (Xrn);
+		patricia->num_active_node--;
+
+			if (l) {
+				if (r) {
+					*Xsp++ = r;
+				}
+				Xrn = l;
+			} else if (r) {
+				Xrn = r;
+			} else if (Xsp != Xstack) {
+				Xrn = *(--Xsp);
+			} else {
+				Xrn = (patricia_node_t *) 0;
+			}
+		}
+	}
+	assert (patricia->num_active_node == 0);
+	/* Delete (patricia); */
+}
+
+
+void
+Destroy_Patricia (patricia_tree_t *patricia, void_fn1_t func)
+{
+	Clear_Patricia (patricia, func);
+	Delete (patricia);
+	num_active_patricia--;
+}
+
+
+/*
+ * if func is supplied, it will be called as func(node->prefix, node->data)
+ */
+
+void
+patricia_process (patricia_tree_t *patricia, void_fn2_t func)
+{
+	patricia_node_t *node;
+	assert (func);
+
+	PATRICIA_WALK (patricia->head, node) {
+	func (node->prefix, node->data);
+	} PATRICIA_WALK_END;
+}
+
+
+patricia_node_t *
+patricia_search_exact (patricia_tree_t *patricia, prefix_t *prefix)
+{
+	patricia_node_t *node;
+	u_char *addr;
+	u_int bitlen;
+
+	assert (patricia);
+	assert (prefix);
+	assert (prefix->bitlen <= patricia->maxbits);
+
+	if (patricia->head == NULL)
+	return (NULL);
+
+	node = patricia->head;
+	addr = prefix_touchar (prefix);
+	bitlen = prefix->bitlen;
+
+	while (node->bit < bitlen) {
+
+	if (BIT_TEST (addr[node->bit >> 3], 0x80 >> (node->bit & 0x07))) {
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_search_exact: take right %s/%d\n", 
+					 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_search_exact: take right at %d\n", 
+			 node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->r;
+	}
+	else {
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_search_exact: take left %s/%d\n", 
+					 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_search_exact: take left at %d\n", 
+			 node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->l;
+	}
+
+	if (node == NULL)
+		return (NULL);
+	}
+
+#ifdef PATRICIA_DEBUG
+	if (node->prefix)
+		fprintf (stderr, "patricia_search_exact: stop at %s/%d\n", 
+			 prefix_toa (node->prefix), node->prefix->bitlen);
+	else
+		fprintf (stderr, "patricia_search_exact: stop at %d\n", node->bit);
+#endif /* PATRICIA_DEBUG */
+	if (node->bit > bitlen || node->prefix == NULL)
+	return (NULL);
+	assert (node->bit == bitlen);
+	assert (node->bit == node->prefix->bitlen);
+	if (comp_with_mask (prefix_tochar (node->prefix), prefix_tochar (prefix),
+			bitlen)) {
+#ifdef PATRICIA_DEBUG
+		fprintf (stderr, "patricia_search_exact: found %s/%d\n", 
+			 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	return (node);
+	}
+	return (NULL);
+}
+
+
+/* if inclusive != 0, "best" may be the given prefix itself */
+patricia_node_t *
+patricia_search_best2 (patricia_tree_t *patricia, prefix_t *prefix, int inclusive)
+{
+	patricia_node_t *node;
+	patricia_node_t *stack[PATRICIA_MAXBITS + 1];
+	u_char *addr;
+	u_int bitlen;
+	int cnt = 0;
+
+	assert (patricia);
+	assert (prefix);
+	assert (prefix->bitlen <= patricia->maxbits);
+
+	if (patricia->head == NULL)
+	return (NULL);
+
+	node = patricia->head;
+	addr = prefix_touchar (prefix);
+	bitlen = prefix->bitlen;
+
+	while (node->bit < bitlen) {
+
+	if (node->prefix) {
+#ifdef PATRICIA_DEBUG
+			fprintf (stderr, "patricia_search_best: push %s/%d\n", 
+				 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+		stack[cnt++] = node;
+	}
+
+	if (BIT_TEST (addr[node->bit >> 3], 0x80 >> (node->bit & 0x07))) {
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_search_best: take right %s/%d\n", 
+					 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_search_best: take right at %d\n", 
+			 node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->r;
+	}
+	else {
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_search_best: take left %s/%d\n", 
+					 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_search_best: take left at %d\n", 
+			 node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->l;
+	}
+
+	if (node == NULL)
+		break;
+	}
+
+	if (inclusive && node && node->prefix && node->bit <= bitlen)
+	stack[cnt++] = node;
+
+#ifdef PATRICIA_DEBUG
+	if (node == NULL)
+		fprintf (stderr, "patricia_search_best: stop at null\n");
+	else if (node->prefix)
+		fprintf (stderr, "patricia_search_best: stop at %s/%d\n", 
+			 prefix_toa (node->prefix), node->prefix->bitlen);
+	else
+		fprintf (stderr, "patricia_search_best: stop at %d\n", node->bit);
+#endif /* PATRICIA_DEBUG */
+
+	if (cnt <= 0)
+	return (NULL);
+
+	while (--cnt >= 0) {
+	node = stack[cnt];
+#ifdef PATRICIA_DEBUG
+		fprintf (stderr, "patricia_search_best: pop %s/%d\n", 
+			 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	if (comp_with_mask (prefix_tochar (node->prefix), 
+				prefix_tochar (prefix),
+				node->prefix->bitlen)) {
+#ifdef PATRICIA_DEBUG
+			fprintf (stderr, "patricia_search_best: found %s/%d\n", 
+				 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+		return (node);
+	}
+	}
+	return (NULL);
+}
+
+
+patricia_node_t *
+patricia_search_best (patricia_tree_t *patricia, prefix_t *prefix)
+{
+	return (patricia_search_best2 (patricia, prefix, 1));
+}
+
+
+patricia_node_t *
+patricia_lookup (patricia_tree_t *patricia, prefix_t *prefix)
+{
+	patricia_node_t *node, *new_node, *parent, *glue;
+	u_char *addr, *test_addr;
+	u_int bitlen, check_bit, differ_bit;
+        u_int i;
+	int j, r;
+
+	assert (patricia);
+	assert (prefix);
+	assert (prefix->bitlen <= patricia->maxbits);
+
+	if (patricia->head == NULL) {
+	node = calloc(1, sizeof *node);
+	node->bit = prefix->bitlen;
+	node->prefix = Ref_Prefix (prefix);
+	node->parent = NULL;
+	node->l = node->r = NULL;
+	node->data = NULL;
+	patricia->head = node;
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: new_node #0 %s/%d (head)\n", 
+		 prefix_toa (prefix), prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	patricia->num_active_node++;
+	return (node);
+	}
+
+	addr = prefix_touchar (prefix);
+	bitlen = prefix->bitlen;
+	node = patricia->head;
+
+	while (node->bit < bitlen || node->prefix == NULL) {
+
+	if (node->bit < patricia->maxbits &&
+		BIT_TEST (addr[node->bit >> 3], 0x80 >> (node->bit & 0x07))) {
+		if (node->r == NULL)
+		break;
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_lookup: take right %s/%d\n", 
+					 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_lookup: take right at %d\n", node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->r;
+	}
+	else {
+		if (node->l == NULL)
+		break;
+#ifdef PATRICIA_DEBUG
+		if (node->prefix)
+				fprintf (stderr, "patricia_lookup: take left %s/%d\n", 
+				 prefix_toa (node->prefix), node->prefix->bitlen);
+		else
+				fprintf (stderr, "patricia_lookup: take left at %d\n", node->bit);
+#endif /* PATRICIA_DEBUG */
+		node = node->l;
+	}
+
+	assert (node);
+	}
+
+	assert (node->prefix);
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: stop at %s/%d\n", 
+		 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+
+	test_addr = prefix_touchar (node->prefix);
+	/* find the first bit different */
+	check_bit = (node->bit < bitlen)? node->bit: bitlen;
+	differ_bit = 0;
+	for (i = 0; i*8 < check_bit; i++) {
+	if ((r = (addr[i] ^ test_addr[i])) == 0) {
+		differ_bit = (i + 1) * 8;
+		continue;
+	}
+	/* I know the better way, but for now */
+	for (j = 0; j < 8; j++) {
+		if (BIT_TEST (r, (0x80 >> j)))
+		break;
+	}
+	/* must be found */
+	assert (j < 8);
+	differ_bit = i * 8 + j;
+	break;
+	}
+	if (differ_bit > check_bit)
+	differ_bit = check_bit;
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: differ_bit %d\n", differ_bit);
+#endif /* PATRICIA_DEBUG */
+
+	parent = node->parent;
+	while (parent && parent->bit >= differ_bit) {
+	node = parent;
+	parent = node->parent;
+#ifdef PATRICIA_DEBUG
+	if (node->prefix)
+			fprintf (stderr, "patricia_lookup: up to %s/%d\n", 
+				 prefix_toa (node->prefix), node->prefix->bitlen);
+	else
+			fprintf (stderr, "patricia_lookup: up to %d\n", node->bit);
+#endif /* PATRICIA_DEBUG */
+	}
+
+	if (differ_bit == bitlen && node->bit == bitlen) {
+	if (node->prefix) {
+#ifdef PATRICIA_DEBUG 
+			fprintf (stderr, "patricia_lookup: found %s/%d\n", 
+			 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+		return (node);
+	}
+	node->prefix = Ref_Prefix (prefix);
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: new node #1 %s/%d (glue mod)\n",
+		 prefix_toa (prefix), prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	assert (node->data == NULL);
+	return (node);
+	}
+
+	new_node = calloc(1, sizeof *new_node);
+	new_node->bit = prefix->bitlen;
+	new_node->prefix = Ref_Prefix (prefix);
+	new_node->parent = NULL;
+	new_node->l = new_node->r = NULL;
+	new_node->data = NULL;
+	patricia->num_active_node++;
+
+	if (node->bit == differ_bit) {
+	new_node->parent = node;
+	if (node->bit < patricia->maxbits &&
+		BIT_TEST (addr[node->bit >> 3], 0x80 >> (node->bit & 0x07))) {
+		assert (node->r == NULL);
+		node->r = new_node;
+	}
+	else {
+		assert (node->l == NULL);
+		node->l = new_node;
+	}
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: new_node #2 %s/%d (child)\n", 
+		 prefix_toa (prefix), prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	return (new_node);
+	}
+
+	if (bitlen == differ_bit) {
+	if (bitlen < patricia->maxbits &&
+		BIT_TEST (test_addr[bitlen >> 3], 0x80 >> (bitlen & 0x07))) {
+		new_node->r = node;
+	}
+	else {
+		new_node->l = node;
+	}
+	new_node->parent = node->parent;
+	if (node->parent == NULL) {
+		assert (patricia->head == node);
+		patricia->head = new_node;
+	}
+	else if (node->parent->r == node) {
+		node->parent->r = new_node;
+	}
+	else {
+		node->parent->l = new_node;
+	}
+	node->parent = new_node;
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: new_node #3 %s/%d (parent)\n", 
+		 prefix_toa (prefix), prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	}
+	else {
+		glue = calloc(1, sizeof *glue);
+		glue->bit = differ_bit;
+		glue->prefix = NULL;
+		glue->parent = node->parent;
+		glue->data = NULL;
+		patricia->num_active_node++;
+	if (differ_bit < patricia->maxbits &&
+		BIT_TEST (addr[differ_bit >> 3], 0x80 >> (differ_bit & 0x07))) {
+		glue->r = new_node;
+		glue->l = node;
+	}
+	else {
+		glue->r = node;
+		glue->l = new_node;
+	}
+	new_node->parent = glue;
+
+	if (node->parent == NULL) {
+		assert (patricia->head == node);
+		patricia->head = glue;
+	}
+	else if (node->parent->r == node) {
+		node->parent->r = glue;
+	}
+	else {
+		node->parent->l = glue;
+	}
+	node->parent = glue;
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_lookup: new_node #4 %s/%d (glue+node)\n", 
+		 prefix_toa (prefix), prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	}
+	return (new_node);
+}
+
+
+void
+patricia_remove (patricia_tree_t *patricia, patricia_node_t *node)
+{
+	patricia_node_t *parent, *child;
+
+	assert (patricia);
+	assert (node);
+
+	if (node->r && node->l) {
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_remove: #0 %s/%d (r & l)\n", 
+		 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	
+	/* this might be a placeholder node -- have to check and make sure
+	 * there is a prefix aossciated with it ! */
+	if (node->prefix != NULL) 
+	  Deref_Prefix (node->prefix);
+	node->prefix = NULL;
+	/* Also I needed to clear data pointer -- masaki */
+	node->data = NULL;
+	return;
+	}
+
+	if (node->r == NULL && node->l == NULL) {
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_remove: #1 %s/%d (!r & !l)\n", 
+		 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	parent = node->parent;
+	Deref_Prefix (node->prefix);
+	Delete (node);
+		patricia->num_active_node--;
+
+	if (parent == NULL) {
+		assert (patricia->head == node);
+		patricia->head = NULL;
+		return;
+	}
+
+	if (parent->r == node) {
+		parent->r = NULL;
+		child = parent->l;
+	}
+	else {
+		assert (parent->l == node);
+		parent->l = NULL;
+		child = parent->r;
+	}
+
+	if (parent->prefix)
+		return;
+
+	/* we need to remove parent too */
+
+	if (parent->parent == NULL) {
+		assert (patricia->head == parent);
+		patricia->head = child;
+	}
+	else if (parent->parent->r == parent) {
+		parent->parent->r = child;
+	}
+	else {
+		assert (parent->parent->l == parent);
+		parent->parent->l = child;
+	}
+	child->parent = parent->parent;
+	Delete (parent);
+		patricia->num_active_node--;
+	return;
+	}
+
+#ifdef PATRICIA_DEBUG
+	fprintf (stderr, "patricia_remove: #2 %s/%d (r ^ l)\n", 
+		 prefix_toa (node->prefix), node->prefix->bitlen);
+#endif /* PATRICIA_DEBUG */
+	if (node->r) {
+	child = node->r;
+	}
+	else {
+	assert (node->l);
+	child = node->l;
+	}
+	parent = node->parent;
+	child->parent = parent;
+
+	Deref_Prefix (node->prefix);
+	Delete (node);
+	patricia->num_active_node--;
+
+	if (parent == NULL) {
+	assert (patricia->head == node);
+	patricia->head = child;
+	return;
+	}
+
+	if (parent->r == node) {
+	parent->r = child;
+	}
+	else {
+		assert (parent->l == node);
+	parent->l = child;
+	}
+}
+
+/* { from demo.c */
+
+patricia_node_t *
+make_and_lookup (patricia_tree_t *tree, char *string)
+{
+	prefix_t *prefix;
+	patricia_node_t *node;
+
+	prefix = ascii2prefix (AF_INET, string);
+	// printf ("make_and_lookup: %s/%d\n", prefix_toa (prefix), prefix->bitlen);
+	node = patricia_lookup (tree, prefix);
+	Deref_Prefix (prefix);
+	return (node);
+}
+
+patricia_node_t *
+try_search_exact (patricia_tree_t *tree, char *string)
+{
+	prefix_t *prefix;
+	patricia_node_t *node;
+
+	prefix = ascii2prefix (AF_INET, string);
+	printf ("try_search_exact: %s/%d\n", prefix_toa (prefix), prefix->bitlen);
+	if ((node = patricia_search_exact (tree, prefix)) == NULL) {
+		printf ("try_search_exact: not found\n");
+	}
+	else {
+		printf ("try_search_exact: %s/%d found\n", 
+			prefix_toa (node->prefix), node->prefix->bitlen);
+	}
+	Deref_Prefix (prefix);
+	return (node);
+}
+
+void
+lookup_then_remove (patricia_tree_t *tree, char *string)
+{
+	patricia_node_t *node;
+
+	if ((node = try_search_exact (tree, string)))
+		patricia_remove (tree, node);
+}
+
+patricia_node_t *
+try_search_best (patricia_tree_t *tree, char *string)
+{
+	prefix_t *prefix;
+	patricia_node_t *node;
+
+	prefix = ascii2prefix (AF_INET, string);
+	printf ("try_search_best: %s/%d\n", prefix_toa (prefix), prefix->bitlen);
+	if ((node = patricia_search_best (tree, prefix)) == NULL)
+		printf ("try_search_best: not found\n");
+	else
+		printf ("try_search_best: %s/%d found\n", 
+			prefix_toa (node->prefix), node->prefix->bitlen);
+	Deref_Prefix (prefix);
+	return 0; // [RS] What is supposed to be returned here?
+ }
+
+/* } */
diff --git a/patricia.h b/patricia.h
new file mode 100644
index 0000000..7597248
--- /dev/null
+++ b/patricia.h
@@ -0,0 +1,218 @@
+/*
+ * This file is part of Pytricia.
+ * Joel Sommers <jsommers@colgate.edu>
+ *
+ * Pytricia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Pytricia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Pytricia.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * $Id: patricia.h 6811 2009-07-06 20:41:10Z robin $
+ * Dave Plonka <plonka@doit.wisc.edu>
+ *
+ * This product includes software developed by the University of Michigan,
+ * Merit Network, Inc., and their contributors. 
+ *
+ * This file had been called "radix.h" in the MRT sources.
+ *
+ * I renamed it to "patricia.h" since it's not an implementation of a general
+ * radix trie.  Also, pulled in various requirements from "mrt.h" and added
+ * some other things it could be used as a standalone API.
+ */
+
+/* From copyright.txt:
+ * 
+ * Copyright (c) 1997, 1998, 1999
+ * 
+ * 
+ * The Regents of the University of Michigan ("The Regents") and Merit Network,
+ * Inc.  All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1.  Redistributions of source code must retain the above 
+ *     copyright notice, this list of conditions and the 
+ *     following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above 
+ *     copyright notice, this list of conditions and the 
+ *     following disclaimer in the documentation and/or other 
+ *     materials provided with the distribution.
+ * 3.  All advertising materials mentioning features or use of 
+ *     this software must display the following acknowledgement:  
+ * This product includes software developed by the University of Michigan, Merit
+ * Network, Inc., and their contributors. 
+ * 4.  Neither the name of the University, Merit Network, nor the
+ *     names of their contributors may be used to endorse or 
+ *     promote products derived from this software without 
+ *     specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+ */
+
+#ifndef _PATRICIA_H
+#define _PATRICIA_H
+
+#include <sys/types.h>
+
+#define HAVE_IPV6 1 // JS: force use of ip6
+
+
+/* { from defs.h */
+#define prefix_touchar(prefix) ((u_char *)&(prefix)->add.sin)
+#define MAXLINE 1024
+#define BIT_TEST(f, b)  ((f) & (b))
+/* } */
+
+#define addroute make_and_lookup
+
+#if defined(_WIN32) || defined(_WIN64)
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#pragma comment(lib, "Ws2_32.lib")
+#else
+#include <netinet/in.h> 
+#include <sys/socket.h> 
+#endif
+
+/* { from mrt.h */
+
+typedef struct _prefix4_t {
+    u_short family;		
+    u_short bitlen;		
+    int ref_count;		
+    struct in_addr sin;
+} prefix4_t;
+
+typedef struct _prefix6_t {
+    u_short family;		
+    u_short bitlen;		
+    int ref_count;		
+    struct in6_addr sin6;
+} prefix6_t;
+
+typedef struct _prefix_t {
+    u_short family;		
+    u_short bitlen;	
+    int ref_count;
+    union {
+		struct in_addr sin;
+#ifdef HAVE_IPV6
+		struct in6_addr sin6;
+#endif /* IPV6 */
+    } add;
+} prefix_t;
+
+/* } */
+
+/* typedef unsigned int u_int; */
+typedef void (*void_fn1_t)(void *);
+typedef void (*void_fn2_t)(struct _prefix_t *, void *);
+
+typedef struct _patricia_node_t {
+   u_int bit;			
+   prefix_t *prefix;		
+   struct _patricia_node_t *l, *r;
+   struct _patricia_node_t *parent;
+   void *data;
+   void	*user1;
+} patricia_node_t;
+
+typedef struct _patricia_tree_t {
+   patricia_node_t 	*head;
+   u_int		maxbits;
+   int num_active_node;
+} patricia_tree_t;
+
+
+patricia_node_t *patricia_search_exact (patricia_tree_t *patricia, prefix_t *prefix);
+patricia_node_t *patricia_search_best (patricia_tree_t *patricia, prefix_t *prefix);
+patricia_node_t * patricia_search_best2 (patricia_tree_t *patricia, prefix_t *prefix, 
+				   int inclusive);
+patricia_node_t *patricia_lookup (patricia_tree_t *patricia, prefix_t *prefix);
+void patricia_remove (patricia_tree_t *patricia, patricia_node_t *node);
+patricia_tree_t *New_Patricia (int maxbits);
+void Clear_Patricia (patricia_tree_t *patricia, void_fn1_t func);
+void Destroy_Patricia (patricia_tree_t *patricia, void_fn1_t func);
+void patricia_process (patricia_tree_t *patricia, void_fn2_t func);
+
+void Deref_Prefix (prefix_t * prefix);
+prefix_t * New_Prefix(int, void *, int);
+
+/* { from demo.c */
+
+prefix_t *
+ascii2prefix (int family, char *string);
+
+char *
+prefix_toa2x(prefix_t *prefix, char *buff, int with_len);
+
+patricia_node_t *
+make_and_lookup (patricia_tree_t *tree, char *string);
+
+/* } */
+
+#define PATRICIA_MAXBITS 128
+#define PATRICIA_NBIT(x)        (0x80 >> ((x) & 0x7f))
+#define PATRICIA_NBYTE(x)       ((x) >> 3)
+
+#define PATRICIA_DATA_GET(node, type) (type *)((node)->data)
+#define PATRICIA_DATA_SET(node, value) ((node)->data = (void *)(value))
+
+#define PATRICIA_WALK(Xhead, Xnode) \
+    do { \
+        patricia_node_t *Xstack[PATRICIA_MAXBITS+1]; \
+        patricia_node_t **Xsp = Xstack; \
+        patricia_node_t *Xrn = (Xhead); \
+        while ((Xnode = Xrn)) { \
+            if (Xnode->prefix)
+
+#define PATRICIA_WALK_ALL(Xhead, Xnode) \
+do { \
+        patricia_node_t *Xstack[PATRICIA_MAXBITS+1]; \
+        patricia_node_t **Xsp = Xstack; \
+        patricia_node_t *Xrn = (Xhead); \
+        while ((Xnode = Xrn)) { \
+	    if (1)
+
+#define PATRICIA_WALK_BREAK { \
+	    if (Xsp != Xstack) { \
+		Xrn = *(--Xsp); \
+	     } else { \
+		Xrn = (patricia_node_t *) 0; \
+	    } \
+	    continue; }
+
+#define PATRICIA_WALK_END \
+            if (Xrn->l) { \
+                if (Xrn->r) { \
+                    *Xsp++ = Xrn->r; \
+                } \
+                Xrn = Xrn->l; \
+            } else if (Xrn->r) { \
+                Xrn = Xrn->r; \
+            } else if (Xsp != Xstack) { \
+                Xrn = *(--Xsp); \
+            } else { \
+                Xrn = (patricia_node_t *) 0; \
+            } \
+        } \
+    } while (0)
+
+#endif /* _PATRICIA_H */
diff --git a/scramble_wlw.c b/scramble_wlw.c
new file mode 100644
index 0000000..ac52718
--- /dev/null
+++ b/scramble_wlw.c
@@ -0,0 +1,115 @@
+#include "scramble_wlw.h"
+#include "patricia.h"
+#include <arpa/inet.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define PREFIX_DELIMITER ",; "
+
+static patricia_tree_t *tree4 = NULL;
+static patricia_tree_t *tree6 = NULL;
+static prefix_t lookup_pfix4;
+static prefix_t lookup_pfix6;
+static scrambler_ip4_t _scrambler_ip4 = NULL;
+static scrambler_ip6_t _scrambler_ip6 = NULL;
+
+
+static inline int
+scramble_wlw_lookup_addr4(const struct in_addr *sin) {
+    if (tree4 == NULL)
+        return 0;
+    memcpy(&lookup_pfix4.add.sin, sin, sizeof(*sin));
+    return (patricia_search_best2(tree4, &lookup_pfix4, 1) != NULL);
+}
+
+static inline int
+scramble_wlw_lookup_addr6(const struct in6_addr *sin6) {
+    if (tree6 == NULL)
+        return 0;
+    memcpy(&lookup_pfix6.add.sin6, sin6, sizeof(*sin6));
+    return (patricia_search_best2(tree6, &lookup_pfix6, 1) != NULL);
+}
+
+/* Init white list wrapper.  Can be called again to add wl-state.
+ * prefix_wlist is a list of ip4 and ip6 prefixes, separated by
+ * one of the PREFIX_DELIMITER
+ * s4 is an ipv4 address scrambler
+ * s6 is an ipv6 address scrambler
+ */
+void
+scramble_wlw_init(const char *prefix_wlist, scrambler_ip4_t s4, scrambler_ip6_t s6) {
+    char *plist = strdup(prefix_wlist), *cp;
+    int afam, bits;
+    patricia_tree_t **tree;
+
+    _scrambler_ip4 = s4;
+    _scrambler_ip6 = s6;
+
+    for (cp = strtok(plist, PREFIX_DELIMITER); cp != NULL; cp = strtok(NULL, PREFIX_DELIMITER)) {
+        if (index(cp, ':') == NULL) {
+            tree = &tree4;
+            afam = AF_INET;
+            bits = 32;
+        } else {
+            tree = &tree6;
+            afam = AF_INET6;
+            bits = 128;
+        }
+        prefix_t *pref = ascii2prefix(afam, cp);
+        if (pref == NULL) {
+            fprintf(stderr, "ERROR: can't parse prefix %s\n", cp);
+            exit(1);
+        }
+        if (index(cp, '/') == NULL) {
+            pref->bitlen = bits;
+        }
+        if (*tree == NULL) {
+            *tree = New_Patricia(bits);
+        }
+        patricia_lookup(*tree, pref);
+        Deref_Prefix(pref);
+    }
+    lookup_pfix4.family = AF_INET;
+    lookup_pfix4.bitlen = 32;
+    lookup_pfix4.ref_count = 0;
+
+    lookup_pfix6.family = AF_INET6;
+    lookup_pfix6.bitlen = 128;
+    lookup_pfix6.ref_count = 0;
+}
+
+/* Clear state */
+void
+scramble_wlw_clear() {
+    if (tree4) {
+        Destroy_Patricia(tree4, NULL);
+        tree4 = NULL;
+    }
+    if (tree6) {
+        Destroy_Patricia(tree6, NULL);
+        tree6 = NULL;
+    }
+}
+
+
+uint32_t
+scramble_wlw_v4(uint32_t oldsrc, int pass_bits) {
+    struct in_addr sin;
+    if (tree4) {
+        sin.s_addr = oldsrc;
+        if (scramble_wlw_lookup_addr4(&sin))
+            return oldsrc; /* whitelisted */
+    }
+    return _scrambler_ip4(oldsrc, pass_bits);
+}
+
+void
+scramble_wlw_v6(struct in6_addr *sin6, int pass_bits) {
+    if (tree6) {
+        if (scramble_wlw_lookup_addr6(sin6))
+            return; /* whitelisted */
+    }
+    _scrambler_ip6(sin6, pass_bits);
+}
+
diff --git a/scramble_wlw.h b/scramble_wlw.h
new file mode 100644
index 0000000..099d271
--- /dev/null
+++ b/scramble_wlw.h
@@ -0,0 +1,16 @@
+#ifndef _SCRAMBLE_WLW_H_
+#define _SCRAMBLE_WLW_H_
+
+#include <stdint.h>
+#include <netinet/in.h>
+
+typedef uint32_t (*scrambler_ip4_t)(uint32_t, int);
+typedef void     (*scrambler_ip6_t)(struct in6_addr *, int);
+
+void     scramble_wlw_init(const char *, scrambler_ip4_t s4, scrambler_ip6_t);
+void     scramble_wlw_clear();
+
+uint32_t scramble_wlw_v4(uint32_t, int);
+void     scramble_wlw_v6(struct in6_addr *, int);
+
+#endif /* _SCRAMBLE_WLW_H */