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Diffstat (limited to 'm4/size_max.m4')
| -rw-r--r-- | m4/size_max.m4 | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/m4/size_max.m4 b/m4/size_max.m4 deleted file mode 100644 index bfba811eb..000000000 --- a/m4/size_max.m4 +++ /dev/null @@ -1,62 +0,0 @@ -# size_max.m4 serial 5 -dnl Copyright (C) 2003, 2005-2006 Free Software Foundation, Inc. -dnl This file is free software; the Free Software Foundation -dnl gives unlimited permission to copy and/or distribute it, -dnl with or without modifications, as long as this notice is preserved. - -dnl From Bruno Haible. - -AC_DEFUN([gl_SIZE_MAX], -[ - AC_CHECK_HEADERS(stdint.h) - dnl First test whether the system already has SIZE_MAX. - AC_MSG_CHECKING([for SIZE_MAX]) - AC_CACHE_VAL([gl_cv_size_max], [ - gl_cv_size_max= - AC_EGREP_CPP([Found it], [ -#include <limits.h> -#if HAVE_STDINT_H -#include <stdint.h> -#endif -#ifdef SIZE_MAX -Found it -#endif -], gl_cv_size_max=yes) - if test -z "$gl_cv_size_max"; then - dnl Define it ourselves. Here we assume that the type 'size_t' is not wider - dnl than the type 'unsigned long'. Try hard to find a definition that can - dnl be used in a preprocessor #if, i.e. doesn't contain a cast. - _AC_COMPUTE_INT([sizeof (size_t) * CHAR_BIT - 1], size_t_bits_minus_1, - [#include <stddef.h> -#include <limits.h>], size_t_bits_minus_1=) - _AC_COMPUTE_INT([sizeof (size_t) <= sizeof (unsigned int)], fits_in_uint, - [#include <stddef.h>], fits_in_uint=) - if test -n "$size_t_bits_minus_1" && test -n "$fits_in_uint"; then - if test $fits_in_uint = 1; then - dnl Even though SIZE_MAX fits in an unsigned int, it must be of type - dnl 'unsigned long' if the type 'size_t' is the same as 'unsigned long'. - AC_TRY_COMPILE([#include <stddef.h> - extern size_t foo; - extern unsigned long foo; - ], [], fits_in_uint=0) - fi - dnl We cannot use 'expr' to simplify this expression, because 'expr' - dnl works only with 'long' integers in the host environment, while we - dnl might be cross-compiling from a 32-bit platform to a 64-bit platform. - if test $fits_in_uint = 1; then - gl_cv_size_max="(((1U << $size_t_bits_minus_1) - 1) * 2 + 1)" - else - gl_cv_size_max="(((1UL << $size_t_bits_minus_1) - 1) * 2 + 1)" - fi - else - dnl Shouldn't happen, but who knows... - gl_cv_size_max='((size_t)~(size_t)0)' - fi - fi - ]) - AC_MSG_RESULT([$gl_cv_size_max]) - if test "$gl_cv_size_max" != yes; then - AC_DEFINE_UNQUOTED([SIZE_MAX], [$gl_cv_size_max], - [Define as the maximum value of type 'size_t', if the system doesn't define it.]) - fi -]) |