- (dtucker) [configure.ac] Enable -fno-builtin-memset when using gcc.

2 files changed, 18 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 0bd06cd6a..38fb74a44 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+20080615
+ - (dtucker) [configure.ac] Enable -fno-builtin-memset when using gcc.
+
 20080614
  - (djm) [openbsd-compat/sigact.c] Avoid NULL derefs in ancient sigaction
    replacement code; patch from ighighi AT gmail.com in bz#1240;
@@ -4369,4 +4372,4 @@
    OpenServer 6 and add osr5bigcrypt support so when someone migrates
    passwords between UnixWare and OpenServer they will still work. OK dtucker@
 
-$Id: ChangeLog,v 1.5011 2008/06/15 00:55:34 djm Exp $
+$Id: ChangeLog,v 1.5012 2008/06/15 16:27:48 dtucker Exp $
diff --git a/configure.ac b/configure.ac
index aea6cb312..eb71a879a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.405 2008/06/13 23:14:46 dtucker Exp $
+# $Id: configure.ac,v 1.406 2008/06/15 16:27:48 dtucker Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT(OpenSSH, Portable, openssh-unix-dev@mindrot.org)
-AC_REVISION($Revision: 1.405 $)
+AC_REVISION($Revision: 1.406 $)
 AC_CONFIG_SRCDIR([ssh.c])
 
 AC_CONFIG_HEADER(config.h)
@@ -112,6 +112,18 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
                 *) ;;
         esac
 
+        AC_MSG_CHECKING(if $CC accepts -fno-builtin-memset)
+        saved_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS -fno-builtin-memset"
+        AC_LINK_IFELSE( [AC_LANG_SOURCE([[
+#include <string.h>
+int main(void){char b[10]; memset(b, 0, sizeof(b));}
+                ]])],
+                [ AC_MSG_RESULT(yes) ],
+                [ AC_MSG_RESULT(no)
+                  CFLAGS="$saved_CFLAGS" ]
+)
+
         # -fstack-protector-all doesn't always work for some GCC versions
         # and/or platforms, so we test if we can.  If it's not supported
         # on a give platform gcc will emit a warning so we use -Werror.