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AC_DEFUN([AX_ISC_CPP17], [
AC_MSG_CHECKING([c++17 support])
# Save flags.
CPPFLAGS_SAVED="${CPPFLAGS}"
# Provide -std=c++17 flag temporarily.
CPPFLAGS="${CPPFLAGS} -std=c++17"
# Check that the filesystem library is supported.
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[#include <filesystem>],
[std::filesystem::path cwd = std::filesystem::current_path();]
)],
[AC_MSG_RESULT([yes])
CPP17_SUPPORTED=true],
[AC_MSG_RESULT([no])
CPP17_SUPPORTED=false])
# Restore flags.
CPPFLAGS="${CPPFLAGS_SAVED}"
])
|
