Patch #1608. Someone with access to autoconf 2.61 or higher needs to
run it and check in the resulting configure file.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7dae508..0d420d0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1123,6 +1123,10 @@
Build
-----
+- Bug #1608: use -fwrapv when GCC supports it. This is important,
+ newer GCC versions may optimize away overflow buffer overflow checks
+ without this option!
+
- Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
- Add a FAST_LOOPS build option that speeds-up looping by trading away