Sync from coreutils.

[gnulib.git] / m4 / mktime.m4

diff --git a/m4/mktime.m4 b/m4/mktime.m4
index 25ca6dc..07be5cc 100644 (file)
--- a/m4/mktime.m4
+++ b/m4/mktime.m4
@@ -1,5 +1,5 @@
-# mktime.m4 serial 5
-dnl Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+#serial 7
+dnl Copyright (C) 2002, 2003, 2005 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.
@@ -14,8 +14,8 @@ dnl From Jim Meyering.
 # --------------
 AC_DEFUN([AC_FUNC_MKTIME],
 [AC_REQUIRE([AC_HEADER_TIME])dnl
-AC_CHECK_HEADERS(stdlib.h sys/time.h unistd.h)
-AC_CHECK_FUNCS(alarm)
+AC_CHECK_HEADERS_ONCE(sys/time.h)
+AC_CHECK_FUNCS_ONCE(alarm)
 AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime,
 [AC_RUN_IFELSE([AC_LANG_SOURCE(
 [[/* Test program from Paul Eggert and Tony Leneis.  */
@@ -30,13 +30,8 @@ AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime,
 # endif
 #endif
 
-#if HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <stdlib.h>
+#include <unistd.h>
 
 #if !HAVE_ALARM
 # define alarm(X) /* empty */