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# time.m4
# serial 6
dnl Copyright (C) 2023-2024 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_FUNC_TIME],
[
AC_REQUIRE([AC_CANONICAL_HOST])
dnl glibc has the bug https://sourceware.org/bugzilla/show_bug.cgi?id=30200 .
AC_CACHE_CHECK([whether time() works],
[gl_cv_func_time_works],
[dnl Guess that it works except on
dnl - glibc >= 2.31 with Linux. And binaries produced on glibc < 2.31
dnl need to run fine on newer glibc versions as well; therefore ignore
dnl __GLIBC_MINOR__.
dnl - FreeBSD, on machines with 2 or more CPUs,
dnl - AIX,
dnl - native Windows.
case "$host_os" in
linux*-gnu*)
AC_EGREP_CPP([Unlucky], [
#include <features.h>
#ifdef __GNU_LIBRARY__
#if __GLIBC__ == 2
Unlucky GNU user
#endif
#endif
],
[gl_cv_func_time_works="guessing no"],
[gl_cv_func_time_works="guessing yes"])
;;
freebsd*) gl_cv_func_time_works="guessing no";;
aix*) gl_cv_func_time_works="guessing no";;
mingw* | windows*) gl_cv_func_time_works="guessing no";;
*) gl_cv_func_time_works="guessing yes";;
esac
])
case "$gl_cv_func_time_works" in
*no) REPLACE_TIME=1 ;;
esac
])
# Prerequisites of lib/time.c.
AC_DEFUN([gl_PREREQ_TIME],
[
:
])
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