From 5237ce67ebbe19b003148d5f38b107644f31bc48 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Thu, 3 Aug 2006 22:27:38 +0000
Subject: [PATCH] detect more broken shells

Originally committed as revision 5926 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 configure | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 960a50e636..d540ff42cd 100755
--- a/configure
+++ b/configure
@@ -4,7 +4,8 @@
 #
 
 # make sure we are running under a compatible shell
-(: ${foo%%bar}) 2>/dev/null
+unset foo
+(: ${foo%%bar}) 2>/dev/null && ! (: ${foo?}) 2>/dev/null
 if test "$?" != 0; then
     if test "x$FFMPEG_CONFIGURE_EXEC" = x; then
         FFMPEG_CONFIGURE_EXEC=1