From fbb93c9efe9105c6bd74333ed144111f59ba60a8 Mon Sep 17 00:00:00 2001
From: Christian Beier <dontmind@freeshell.org>
Date: Wed, 20 Oct 2010 14:47:35 +0200
Subject: [PATCH] Fix build failure wrt IP QoS support in libvncclient.

This is a small addendum to 0797e42a4aaf8131ae71899faea2d682ed81cb59.
Seems that having IPv6 support in the OS does not necessarily mean that
IPV6_TCLASS is available. One such case seems to be Mac OS X 10.5.
---
 libvncclient/sockets.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libvncclient/sockets.c b/libvncclient/sockets.c
index a4caaa5..334928e 100644
--- a/libvncclient/sockets.c
+++ b/libvncclient/sockets.c
@@ -599,7 +599,7 @@ SetDSCP(int sock, int dscp)
 
   switch(addr.sa_family)
     {
-#ifdef LIBVNCSERVER_IPv6
+#if defined LIBVNCSERVER_IPv6 && defined IPV6_TCLASS
     case AF_INET6:
       level = IPPROTO_IPV6;
       cmd = IPV6_TCLASS;