X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Frealloc.m4;h=5925796864e033cb4e0794c9e751378f513b97c5;hb=16685f16dd4a1a691ae6807eeb12f7c586669003;hp=ff8314dd4fc407e9de5380a6020e9fd76a1ef9d9;hpb=ee76465ad82c04707c78ff3ed723358217c9e34f;p=gnulib.git

diff --git a/m4/realloc.m4 b/m4/realloc.m4
index ff8314dd4..592579686 100644
--- a/m4/realloc.m4
+++ b/m4/realloc.m4
@@ -1,34 +1,23 @@
-#serial 5
+# realloc.m4 serial 9
+dnl Copyright (C) 2007, 2009 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.
 
-dnl From Jim Meyering.
-dnl Determine whether realloc works when both arguments are 0.
-dnl If it doesn't, arrange to use the replacement function.
-dnl
-
-AC_DEFUN([jm_FUNC_REALLOC],
+# gl_FUNC_REALLOC_POSIX
+# ---------------------
+# Test whether 'realloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails), and replace realloc if it is not.
+AC_DEFUN([gl_FUNC_REALLOC_POSIX],
 [
- dnl xmalloc.c requires that this symbol be defined so it doesn't
- dnl mistakenly use a broken realloc -- as it might if this test were omitted.
- AC_DEFINE_UNQUOTED(HAVE_DONE_WORKING_REALLOC_CHECK, 1,
-                    [Define if the realloc check has been performed. ])
-
- AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
-  [AC_TRY_RUN([
-    char *realloc ();
-    int
-    main ()
-    {
-      exit (realloc (0, 0) ? 0 : 1);
-    }
-	  ],
-	 jm_cv_func_working_realloc=yes,
-	 jm_cv_func_working_realloc=no,
-	 dnl When crosscompiling, assume realloc is broken.
-	 jm_cv_func_working_realloc=no)
-  ])
-  if test $jm_cv_func_working_realloc = no; then
-    AC_LIBOBJ(realloc)
-    AC_DEFINE_UNQUOTED(realloc, rpl_realloc,
-      [Define to rpl_realloc if the replacement function should be used.])
+  AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
+  if test $gl_cv_func_malloc_posix = yes; then
+    HAVE_REALLOC_POSIX=1
+    AC_DEFINE([HAVE_REALLOC_POSIX], [1],
+      [Define if the 'realloc' function is POSIX compliant.])
+  else
+    AC_LIBOBJ([realloc])
+    HAVE_REALLOC_POSIX=0
   fi
+  AC_SUBST([HAVE_REALLOC_POSIX])
 ])