X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ftimegm.m4;h=01a244bcd23353c2333849fda38de0eb8eb11e76;hb=17adb5d75404cf6cdde0eb3b2edc6110d9fa8001;hp=a0ba0e3a8a58f7cae131fe55960478861b296278;hpb=963409a8758faf2b24658c0a23cf0424211263d3;p=gnulib.git

diff --git a/m4/timegm.m4 b/m4/timegm.m4
index a0ba0e3a8..01a244bcd 100644
--- a/m4/timegm.m4
+++ b/m4/timegm.m4
@@ -1,25 +1,40 @@
-# 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, 2009-2011 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
 ])