2 dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_TIMEGM],
9 AC_REQUIRE([gl_FUNC_MKTIME])
10 if test $ac_cv_func_working_mktime = no; then
11 # Assume that timegm is buggy if mktime is.
15 AC_REPLACE_FUNCS(timegm)
18 if test $ac_cv_func_timegm = yes; then
19 AC_CHECK_DECLS([timegm], [REPLACE_TIMEGM=0], [], [#include <time.h>])
21 if test $REPLACE_TIMEGM = 1; then
26 # Prerequisites of lib/timegm.c.
27 AC_DEFUN([gl_PREREQ_TIMEGM], [
28 AC_REQUIRE([gl_TIME_R])
29 AC_REQUIRE([gl_FUNC_MKTIME])
30 if test $ac_cv_func_working_mktime = yes; then
31 AC_CHECK_FUNC(__mktime_internal, ,
32 [# mktime works but it doesn't export __mktime_internal,
33 # so we need to substitute our own mktime implementation.
35 AC_DEFINE([mktime], [rpl_mktime],
36 [Define to rpl_mktime if the replacement function should be used.])