X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=m4%2Ftimegm.m4;h=caabc86ade6c350c379b56ac065cce24eb3a7cb0;hb=c4c53bb2f7c0a05e9795da46ea3ddc17b2ef0c78;hp=a0ba0e3a8a58f7cae131fe55960478861b296278;hpb=963409a8758faf2b24658c0a23cf0424211263d3;p=pspp

diff --git a/m4/timegm.m4 b/m4/timegm.m4
index a0ba0e3a8a..caabc86ade 100644
--- a/m4/timegm.m4
+++ b/m4/timegm.m4
@@ -1,25 +1,26 @@
-# 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 11
+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
-    gl_PREREQ_TIMEGM
+  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 $gl_cv_func_working_mktime = no; then
+      # Assume that timegm is buggy if mktime is.
+      REPLACE_TIMEGM=1
+    fi
+  else
+    HAVE_TIMEGM=0
   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)
+  :
 ])