Author: Jaret Cantu <jaret.cantu@timesys.com>
Date:   Thu Jan 14 12:07:21 EST 2016

    Include definition for IPV6_PKTINFO if not provided

    If struct in6_pktinfo is available in the build, IPV6_PKTINFO
    is also assumed, which is not necessarily the case (at least
    with uClibc without IPv6).

Index: bind-9.11.2-P1/lib/isc/unix/socket.c
===================================================================
--- bind-9.11.2-P1.orig/lib/isc/unix/socket.c
+++ bind-9.11.2-P1/lib/isc/unix/socket.c
@@ -97,6 +97,10 @@
 #include <netinet/tcp.h>
 #endif
 
+#ifndef IPV6_PKTINFO
+#define IPV6_PKTINFO 50
+#endif
+
 /*%
  * Choose the most preferable multiplex method.
  */