From 0bdeb409207ddef32548eb0e6e9b87fb41fcb969 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Thu, 21 Aug 2003 04:38:27 +0000
Subject: [PATCH] Add --enable-poisoning option, and make it default to off in
 normal releases, on in ./autogen.sh configuration.  Add ...

Original commit message from CVS:
Add --enable-poisoning option, and make it default to off in normal
releases, on in ./autogen.sh configuration.  Add automake17 as a
possible automake name.
---
 autogen.sh   |  4 ++--
 configure.ac | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/autogen.sh b/autogen.sh
index f8f8c96e47..9fb56443e0 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -19,7 +19,7 @@ then
 fi
 . common/gst-autogen.sh
 
-CONFIGURE_DEF_OPT='--enable-maintainer-mode --enable-plugin-builddir --enable-failing-tests'
+CONFIGURE_DEF_OPT='--enable-maintainer-mode --enable-plugin-builddir --enable-failing-tests --enable-poisoning'
 
 autogen_options $@
 
@@ -27,7 +27,7 @@ echo -n "+ check for build tools"
 if test ! -z "$NOCHECK"; then echo ": skipped version checks"; else  echo; fi
 version_check "autoconf" "$AUTOCONF autoconf autoconf-2.54 autoconf-2.53 autoconf-2.52" \
               "ftp://ftp.gnu.org/pub/gnu/autoconf/" 2 52 || DIE=1
-version_check "automake" "$AUTOMAKE automake automake-1.7 automake-1.6" \
+version_check "automake" "$AUTOMAKE automake automake-1.7 automake17 automake-1.6" \
               "ftp://ftp.gnu.org/pub/gnu/automake/" 1 6 || DIE=1
 version_check "libtoolize" "libtoolize libtoolize14" \
               "ftp://ftp.gnu.org/pub/gnu/libtool/" 1 4 0 || DIE=1
diff --git a/configure.ac b/configure.ac
index d755ddc376..d9fc0ba2a0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -336,6 +336,16 @@ esac],
 [BUILD_EXAMPLES=yes]) dnl Default value
 AM_CONDITIONAL(BUILD_EXAMPLES,      test "x$BUILD_EXAMPLES" = "xyes")
 
+dnl poison destroyed objects
+AC_ARG_ENABLE(poisoning,
+AC_HELP_STRING([--enable-poisoning],[enable poisoning of deallocated objects]),
+[case "${enableval}" in
+  yes) USE_POISONING=yes ;;
+  no)  USE_POISONING=no ;;
+  *) AC_MSG_ERROR(bad value ${enableval} for --enable-poisoning) ;;
+esac], 
+[USE_POISONING=no]) dnl Default value
+
 dnl Next, check for the optional components:
 dnl ========================================
 
@@ -394,6 +404,10 @@ if test "x$USE_FAST_STACK_TRASH" = xyes; then
   AC_DEFINE(USE_FAST_STACK_TRASH, 1, [Define if we should use i586 optimized stack functions])
 fi
 
+if test "x$USE_POISONING" = xyes; then
+  AC_DEFINE(USE_POISONING, 1, [Define if we should poison deallocated memory])
+fi
+
 dnl test if we have pthread_attr_setstack; if not use the older calls
 AC_CHECK_LIB(pthread, pthread_attr_setstack, 
    AC_DEFINE(HAVE_PTHREAD_ATTR_SETSTACK, 1,