From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 6 Feb 2016 18:13:50 +0000 (-0800)
Subject: Port better to gcc -fsanitize=address
X-Git-Tag: v2.69b~84
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=14f568f6830b49214e0ad020c9d30559ce8abc7d;p=thirdparty%2Fautoconf.git

Port better to gcc -fsanitize=address

* lib/autoconf/functions.m4 (_AC_FUNC_MALLOC_IF, _AC_FUNC_REALLOC_IF):
Free heap-allocated storage before exiting.
---

diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 51ae5a42..edc666d4 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -905,7 +905,10 @@ AC_CACHE_CHECK([for GNU libc compatible malloc], ac_cv_func_malloc_0_nonnull,
 [AC_LANG_PROGRAM(
 [[#include <stdlib.h>
 ]],
-		 [return ! malloc (0);])],
+		 [char *p = malloc (0);
+		  int result = !p;
+		  free (p);
+		  return result;])],
 	       [ac_cv_func_malloc_0_nonnull=yes],
 	       [ac_cv_func_malloc_0_nonnull=no],
 	       [case "$host_os" in # ((
@@ -1409,7 +1412,10 @@ AC_CACHE_CHECK([for GNU libc compatible realloc], ac_cv_func_realloc_0_nonnull,
 [AC_LANG_PROGRAM(
 [[#include <stdlib.h>
 ]],
-		 [return ! realloc (0, 0);])],
+		 [char *p = realloc (0, 0);
+		  int result = !p;
+		  free (p);
+		  return result;])],
 	       [ac_cv_func_realloc_0_nonnull=yes],
 	       [ac_cv_func_realloc_0_nonnull=no],
 	       [case "$host_os" in # ((