X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d5629ce34ac7b463d4bf27993ee77d01c79b2532..8c182d059230c46d9c641503c87cdc675f8cfe4f:/m4/malloc.m4?ds=inline

diff --git a/m4/malloc.m4 b/m4/malloc.m4
index f6d43c91..2452acf0 100644
--- a/m4/malloc.m4
+++ b/m4/malloc.m4
@@ -1,40 +1,25 @@
-#serial 7
+# malloc.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 malloc accepts 0 as its argument.
 dnl If it doesn't, arrange to use the replacement function.
-dnl
 
 AC_DEFUN([jm_FUNC_MALLOC],
 [
- dnl xmalloc.c requires that this symbol be defined so it doesn't
- dnl mistakenly use a broken malloc -- as it might if this test were omitted.
- AC_DEFINE(HAVE_DONE_WORKING_MALLOC_CHECK, 1,
-           [Define if the malloc check has been performed. ])
-
- AC_CACHE_CHECK([whether malloc(0) returns a non-NULL pointer],
-                jm_cv_func_working_malloc,
-  [AC_TRY_RUN([
-    char *malloc ();
-    int
-    main ()
-    {
-      exit (malloc (0) ? 0 : 1);
-    }
-	  ],
-	 jm_cv_func_working_malloc=yes,
-	 jm_cv_func_working_malloc=no,
-	 dnl When crosscompiling, assume malloc(0) returns NULL.
-	 jm_cv_func_working_malloc=no)
-  ])
-  if test $jm_cv_func_working_malloc = yes; then
-    AC_DEFINE([HAVE_MALLOC], 1,
-	      [Define to 1 if your system has a working `malloc' function,
-	       and to 0 otherwise.])
-  else
-    AC_DEFINE([HAVE_MALLOC], 0)
-    AC_LIBOBJ(malloc)
-    AC_DEFINE(malloc, rpl_malloc,
-      [Define to rpl_malloc if the replacement function should be used.])
+  AC_REQUIRE([AC_FUNC_MALLOC])
+  dnl autoconf < 2.57 used the symbol ac_cv_func_malloc_works.
+  if test X"$ac_cv_func_malloc_0_nonnull" = Xno || test X"$ac_cv_func_malloc_works" = Xno; then
+    gl_PREREQ_MALLOC
   fi
 ])
+
+# Prerequisites of lib/malloc.c.
+AC_DEFUN([gl_PREREQ_MALLOC], [
+  :
+])