X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fgettimeofday.m4;h=e7a5a6db6e7e8c2977acc3a0a0ba0a3d877b5b97;hb=02d97fa1f7a73756747951b74de8655d9f11b509;hp=895f89269361a7283ee48a4928f081fd49bf9f37;hpb=6fe8d7498529e40705598c70355fd2f38efc7aea;p=gnulib.git

diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4
index 895f89269..e7a5a6db6 100644
--- a/m4/gettimeofday.m4
+++ b/m4/gettimeofday.m4
@@ -1,4 +1,4 @@
-#serial 1
+#serial 4
 
 dnl From Jim Meyering.
 dnl
@@ -6,13 +6,13 @@ 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_CHECK_HEADERS_ONCE(stdlib.h string.h)
  AC_CACHE_CHECK([whether gettimeofday clobbers localtime buffer],
   jm_cv_func_gettimeofday_clobber,
   [AC_TRY_RUN([
@@ -58,10 +58,25 @@ main ()
 	 jm_cv_func_gettimeofday_clobber=yes)
   ])
   if test $jm_cv_func_gettimeofday_clobber = yes; then
-    AC_LIBOBJ(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])
+])