Update copyright to 2004.

[bison.git] / m4 / realloc.m4

diff --git a/m4/realloc.m4 b/m4/realloc.m4
index 966f0f54022f392d65b913bbe7bfc63d8577a4c5..9f746f1902cd79dc72dc184ab29c011f77eefe08 100644 (file)
--- a/m4/realloc.m4
+++ b/m4/realloc.m4
@@ -1,40 +1,25 @@
-#serial 6
+# realloc.m4 serial 7
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.

 
 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 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],
 [
 
 AC_DEFUN([jm_FUNC_REALLOC],
 [

- 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(HAVE_DONE_WORKING_REALLOC_CHECK, 1,
-           [Define if the realloc check has been performed. ])
-
- AC_CACHE_CHECK([whether realloc(0,0) returns a non-NULL pointer],
-                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(0,0) returns NULL.
-        jm_cv_func_working_realloc=no)
-  ])
-  if test $jm_cv_func_working_realloc = yes; then
-    AC_DEFINE([HAVE_REALLOC], 1,
-             [Define to 1 if your system has a working `realloc' function,
-              and to 0 otherwise.])
-  else
-    AC_DEFINE([HAVE_REALLOC], 0)
-    AC_LIBOBJ(realloc)
-    AC_DEFINE(realloc, rpl_realloc,
-      [Define to rpl_realloc if the replacement function should be used.])
+  AC_REQUIRE([AC_FUNC_REALLOC])
+  dnl autoconf < 2.57 used the symbol ac_cv_func_realloc_works.
+  if test X"$ac_cv_func_realloc_0_nonnull" = Xno || test X"$ac_cv_func_realloc_works" = Xno; then
+    gl_PREREQ_REALLOC

   fi
 ])
   fi
 ])

+
+# Prerequisites of lib/realloc.c.
+AC_DEFUN([gl_PREREQ_REALLOC], [
+  :
+])