sys_time: use link-warning

[gnulib.git] / m4 / gettimeofday.m4

diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4
index 655e276..2155627 100644 (file)
--- a/m4/gettimeofday.m4
+++ b/m4/gettimeofday.m4
@@ -1,6 +1,6 @@
-#serial 11
+# serial 13
 
-# Copyright (C) 2001, 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2001-2003, 2005, 2007, 2009-2010 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -11,29 +11,30 @@ AC_DEFUN([gl_FUNC_GETTIMEOFDAY],
 [
   AC_REQUIRE([AC_C_RESTRICT])
   AC_REQUIRE([gl_HEADER_SYS_TIME_H])
+  AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS])
   AC_CHECK_FUNCS_ONCE([gettimeofday])
 
   AC_CACHE_CHECK([for gettimeofday with POSIX signature],
     [gl_cv_func_gettimeofday_posix_signature],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
-         [[#include <sys/time.h>
-           struct timeval c;
-         ]],
-         [[
-           int (*f) (struct timeval *restrict, void *restrict) = gettimeofday;
-           int x = f (&c, 0);
-           return !(x | c.tv_sec | c.tv_usec);
-         ]])],
-       [gl_cv_func_gettimeofday_posix_signature=yes],
-       [gl_cv_func_gettimeofday_posix_signature=no])])
+          [[#include <sys/time.h>
+            struct timeval c;
+          ]],
+          [[
+            int (*f) (struct timeval *restrict, void *restrict) = gettimeofday;
+            int x = f (&c, 0);
+            return !(x | c.tv_sec | c.tv_usec);
+          ]])],
+        [gl_cv_func_gettimeofday_posix_signature=yes],
+        [gl_cv_func_gettimeofday_posix_signature=no])])
 
   gl_FUNC_GETTIMEOFDAY_CLOBBER
 
   if test $gl_cv_func_gettimeofday_posix_signature != yes; then
-    GETTIMEOFDAY_REPLACEMENT=1
+    REPLACE_GETTIMEOFDAY=1
     if test $gl_cv_func_gettimeofday_clobber != yes; then
-      AC_LIBOBJ(gettimeofday)
+      AC_LIBOBJ([gettimeofday])
       gl_PREREQ_GETTIMEOFDAY
     fi
   fi
@@ -55,36 +56,36 @@ AC_DEFUN([gl_FUNC_GETTIMEOFDAY_CLOBBER],
   [gl_cv_func_gettimeofday_clobber],
   [AC_RUN_IFELSE(
      [AC_LANG_PROGRAM(
-       [[#include <string.h>
-         #include <sys/time.h>
-         #include <time.h>
-         #include <stdlib.h>
-       ]],
-       [[
-         time_t t = 0;
-         struct tm *lt;
-         struct tm saved_lt;
-         struct timeval tv;
-         lt = localtime (&t);
-         saved_lt = *lt;
-         gettimeofday (&tv, NULL);
-         return memcmp (lt, &saved_lt, sizeof (struct tm)) != 0;
-       ]])],
+        [[#include <string.h>
+          #include <sys/time.h>
+          #include <time.h>
+          #include <stdlib.h>
+        ]],
+        [[
+          time_t t = 0;
+          struct tm *lt;
+          struct tm saved_lt;
+          struct timeval tv;
+          lt = localtime (&t);
+          saved_lt = *lt;
+          gettimeofday (&tv, NULL);
+          return memcmp (lt, &saved_lt, sizeof (struct tm)) != 0;
+        ]])],
      [gl_cv_func_gettimeofday_clobber=no],
      [gl_cv_func_gettimeofday_clobber=yes],
      dnl When crosscompiling, assume it is broken.
      [gl_cv_func_gettimeofday_clobber=yes])])
 
  if test $gl_cv_func_gettimeofday_clobber = yes; then
-   GETTIMEOFDAY_REPLACEMENT=1
+   REPLACE_GETTIMEOFDAY=1
    gl_GETTIMEOFDAY_REPLACE_LOCALTIME
-   AC_DEFINE([GETTIMEOFDAY_CLOBBERS_LOCALTIME], 1,
+   AC_DEFINE([GETTIMEOFDAY_CLOBBERS_LOCALTIME], [1],
      [Define if gettimeofday clobbers the localtime buffer.])
  fi
 ])
 
 AC_DEFUN([gl_GETTIMEOFDAY_REPLACE_LOCALTIME], [
-  AC_LIBOBJ(gettimeofday)
+  AC_LIBOBJ([gettimeofday])
   gl_PREREQ_GETTIMEOFDAY
   AC_DEFINE([gmtime], [rpl_gmtime],
     [Define to rpl_gmtime if the replacement function should be used.])