-# timegm.m4 serial 1
-dnl Copyright (C) 2003 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# timegm.m4 serial 8
+dnl Copyright (C) 2003, 2007, 2009, 2010 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.
AC_DEFUN([gl_FUNC_TIMEGM],
[
- AC_REPLACE_FUNCS(timegm)
- if test $ac_cv_func_timegm = no; then
+ AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
+ AC_REQUIRE([gl_FUNC_MKTIME])
+ REPLACE_TIMEGM=0
+ AC_CHECK_FUNCS_ONCE([timegm])
+ if test $ac_cv_func_timegm = yes; then
+ if test $ac_cv_func_working_mktime = no; then
+ # Assume that timegm is buggy if mktime is.
+ REPLACE_TIMEGM=1
+ fi
+ else
+ HAVE_TIMEGM=0
+ fi
+ if test $HAVE_TIMEGM = 0 || test $REPLACE_TIMEGM = 1; then
+ AC_LIBOBJ([timegm])
gl_PREREQ_TIMEGM
fi
])
# Prerequisites of lib/timegm.c.
AC_DEFUN([gl_PREREQ_TIMEGM], [
- AC_CHECK_DECLS(gmtime_r,,,[
-#ifdef HAVE_TIME_H
-#include <time.h>
-#endif
-])
- AC_CHECK_FUNCS(gmtime_r)
+ AC_REQUIRE([gl_TIME_R])
+ AC_REQUIRE([gl_FUNC_MKTIME])
+ if test $ac_cv_func_working_mktime = yes; then
+ AC_CHECK_FUNC([__mktime_internal], ,
+ [# mktime works but it doesn't export __mktime_internal,
+ # so we need to substitute our own mktime implementation.
+ AC_LIBOBJ([mktime])
+ AC_DEFINE([mktime], [rpl_mktime],
+ [Define to rpl_mktime if the replacement function should be used.])
+ gl_PREREQ_MKTIME])
+ fi
])