From 503e5e12c27bf130d388e09fe770d16d9b486821 Mon Sep 17 00:00:00 2001
From: Stefan Krah <skrah@bytereef.org>
Date: Wed, 14 Sep 2011 15:19:42 +0200
Subject: Backport fix for issue #11149.

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

diff --git a/configure b/configure
index 99a7c71..7d6423a 100755
--- a/configure
+++ b/configure
@@ -5411,6 +5411,12 @@ 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 acd35d8..9d7bfa6 100644
--- a/configure.in
+++ b/configure.in
@@ -932,6 +932,12 @@ 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
-- 
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