From 764551c672bfc9d87ceef31ba5f111ca02533e1a Mon Sep 17 00:00:00 2001
From: Aurelien Jacobs <aurel@gnuage.org>
Date: Fri, 16 Jan 2009 00:37:38 +0000
Subject: [PATCH] add -Wundef compiler flag, to catch typo in #if or similar
 situations

Originally committed as revision 16621 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 configure | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index f2cc947793..419af7c69e 100755
--- a/configure
+++ b/configure
@@ -2045,6 +2045,7 @@ check_cflags -Wno-pointer-sign
 check_cflags -Wcast-qual
 check_cflags -Wwrite-strings
 check_cflags -Wtype-limits
+check_cflags -Wundef
 enabled extra_warnings && check_cflags -Winline
 
 # add some linker flags