From 39da2957893a04f044d3bcbd091e47637a9a8c18 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 9 Feb 2015 13:13:17 +1100
Subject: [PATCH] build: trap on signed wraparound

---
 m4/nc_debugging.m4 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/m4/nc_debugging.m4 b/m4/nc_debugging.m4
index 8527dc6b..d6fcf5ed 100644
--- a/m4/nc_debugging.m4
+++ b/m4/nc_debugging.m4
@@ -21,6 +21,8 @@ AC_DEFUN([NC_DEBUGGING],[
 
         AX_APPEND_LINK_FLAGS([-lasan], [], [-Werror])
         AX_APPEND_LINK_FLAGS([-lubsan], [], [-Werror])
+
+        AX_APPEND_COMPILE_FLAGS([-ftrapv], [], [-Werror])
     ])
 
     ##-------------------------------------------------------------------------