From 962055d3c658e9b2e75ba4c3682c3639eea9aed8 Mon Sep 17 00:00:00 2001
From: Stefan Krah <skrah@bytereef.org>
Date: Wed, 14 Sep 2011 15:14:08 +0200
Subject: [PATCH] Issue #11149: recent versions of clang require the -fwrapv
 flag.

---
 configure    | 6 ++++++
 configure.in | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/configure b/configure
index 9d85e359b1d..de53c09b7e3 100755
--- a/configure
+++ b/configure
@@ -5504,6 +5504,12 @@ then
         if "$CC" -v --help 2>/dev/null |grep -- -fwrapv > /dev/null; then
            WRAP="-fwrapv"
         fi
+
+        # Clang also needs -fwrapv
+        if test "$CC" = "clang" ; then
+            WRAP="-fwrapv"
+        fi
+
 	case $ac_cv_prog_cc_g in
 	yes)
 	    if test "$Py_DEBUG" = 'true' ; then
diff --git a/configure.in b/configure.in
index 3e60d8e0165..1bbb559aed3 100644
--- a/configure.in
+++ b/configure.in
@@ -926,6 +926,12 @@ then
         if "$CC" -v --help 2>/dev/null |grep -- -fwrapv > /dev/null; then
            WRAP="-fwrapv"
         fi
+
+        # Clang also needs -fwrapv
+        if test "$CC" = "clang" ; then
+            WRAP="-fwrapv"
+        fi
+
 	case $ac_cv_prog_cc_g in
 	yes)
 	    if test "$Py_DEBUG" = 'true' ; then