Ran autoconf.

configure

 #! /bin/sh
-# From configure.in Revision: 59242 .
+# From configure.in Revision: 59484 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for python 2.6.
 #
@@ -4430,6 +4430,10 @@ then
         if test "$CC" != 'g++' ; then
 	    STRICT_PROTO="-Wstrict-prototypes"
 	fi
+        # For gcc 4.x we need to use -fwrapv so lets check if its supported
+        if "$CC" -v --help 2>/dev/null |grep -- -fwrapv > /dev/null; then
+           WRAP="-fwrapv"
+        fi
 	case $ac_cv_prog_cc_g in
 	yes)
 	    if test "$Py_DEBUG" = 'true' ; then
@@ -4437,7 +4441,7 @@ then
 		# debug builds.
 		OPT="-g -Wall $STRICT_PROTO"
 	    else
-		OPT="-g -O3 -Wall $STRICT_PROTO"
+		OPT="-g $WRAP -O3 -Wall $STRICT_PROTO"
 	    fi
 	    ;;
 	*)