From 3b85fca43cce31278662622222c37f2c4479510d Mon Sep 17 00:00:00 2001
From: Christophe CURIS <christophe.curis@free.fr>
Date: Thu, 10 Oct 2013 23:55:56 +0200
Subject: [PATCH] configure: Added compilation check for dangerous use of
 'extern' keyword

---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index 77d16dbd..48c26377 100644
--- a/configure.ac
+++ b/configure.ac
@@ -102,6 +102,11 @@ AS_IF([test "x$debug" = "xyes"],
      dnl Try to report misuses of '&' versus '&&' and similar
      AX_CFLAGS_GCC_OPTION([-Wlogical-op])
      dnl
+     dnl Reports declaration of global things that are done inside
+     dnl a local environment, instead of using the appropriate
+     dnl header
+     AX_CFLAGS_GCC_OPTION([-Wnested-externs])
+     dnl
      dnl Use of 'sizeof()' on inappropriate pointer types
      AX_CFLAGS_GCC_OPTION([-Wpointer-arith])
 ], [dnl
-- 
2.11.4.GIT