From 9ad36deeb3ea647f0bc3b448960df8b03daaff06 Mon Sep 17 00:00:00 2001
From: Darren Salt <linux@youmustbejoking.demon.co.uk>
Date: Fri, 28 Jul 2006 18:27:10 +0000
Subject: Check whether XShm.h is available; abort if not.

CVS patchset: 8140
CVS date: 2006/07/28 18:27:10
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index c8a25a588..ffc931dad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -567,6 +567,12 @@ else
 fi
 AM_CONDITIONAL(HAVE_V4L, [test x"$have_v4l" = "xyes"])
 
+dnl ----------------------------------------------
+dnl Check for XShm support (required)
+dnl ----------------------------------------------
+
+AC_CHECK_HEADERS([X11/extensions/XShm.h], [],
+		 [AC_MSG_ERROR([XShm extension is required])])
 
 dnl ----------------------------------------------
 dnl Check for Xv and XvMC support
-- 
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