Remove K&R cruft.

[gnulib.git] / m4 / gettimeofday.m4

diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4
index 3e2baa1..3875972 100644 (file)
--- a/m4/gettimeofday.m4
+++ b/m4/gettimeofday.m4
@@ -1,4 +1,4 @@
-#serial 1
+#serial 5
 
 dnl From Jim Meyering.
 dnl
@@ -6,20 +6,17 @@ dnl See if gettimeofday clobbers the static buffer that localtime uses
 dnl for it's return value.  The gettimeofday function from Mac OS X 10.0.4,
 dnl i.e. Darwin 1.3.7 has this problem.
 dnl
-dnl If it does, then arrange to use gettimeofday only via the wrapper
-dnl function that works around the problem.
+dnl If it does, then arrange to use gettimeofday and localtime only via
+dnl the wrapper functions that work around the problem.
 
 AC_DEFUN([AC_FUNC_GETTIMEOFDAY_CLOBBER],
 [
  AC_REQUIRE([AC_HEADER_TIME])
- AC_CHECK_HEADERS(string.h stdlib.h)
  AC_CACHE_CHECK([whether gettimeofday clobbers localtime buffer],
   jm_cv_func_gettimeofday_clobber,
   [AC_TRY_RUN([
 #include <stdio.h>
-#if HAVE_STRING_H
-# include <string.h>
-#endif
+#include <string.h>
 
 #if TIME_WITH_SYS_TIME
 # include <sys/time.h>
@@ -32,9 +29,7 @@ AC_DEFUN([AC_FUNC_GETTIMEOFDAY_CLOBBER],
 # endif
 #endif
 
-#if HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
+#include <stdlib.h>
 
 int
 main ()
@@ -58,10 +53,25 @@ main ()
         jm_cv_func_gettimeofday_clobber=yes)
   ])
   if test $jm_cv_func_gettimeofday_clobber = yes; then
-    AC_LIBOBJ(gettimeofday)
-    AC_DEFINE_UNQUOTED(gettimeofday, rpl_gettimeofday,
+    gl_GETTIMEOFDAY_REPLACE_LOCALTIME
+
+    AC_DEFINE(gettimeofday, rpl_gettimeofday,
       [Define to rpl_gettimeofday if the replacement function should be used.])
     AC_DEFINE(GETTIMEOFDAY_CLOBBERS_LOCALTIME_BUFFER, 1,
       [Define if gettimeofday clobbers localtime's static buffer.])
+    gl_PREREQ_GETTIMEOFDAY
   fi
 ])
+
+AC_DEFUN([gl_GETTIMEOFDAY_REPLACE_LOCALTIME], [
+  AC_LIBOBJ(gettimeofday)
+  AC_DEFINE(gmtime, rpl_gmtime,
+    [Define to rpl_gmtime if the replacement function should be used.])
+  AC_DEFINE(localtime, rpl_localtime,
+    [Define to rpl_localtime if the replacement function should be used.])
+])
+
+# Prerequisites of lib/gettimeofday.c.
+AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [
+  AC_REQUIRE([AC_HEADER_TIME])
+])