From 6dbdc972c4509b4c31577fca0402ad7a6b6e2c5d Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 28 Oct 2013 14:22:57 +0000
Subject: [PATCH] Fix FTBFS on OS X >=10.7 Need to select a IPv6 sockopt API.

---
 src/config.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/config.h b/src/config.h
index 0edc4af..b351a37 100644
--- a/src/config.h
+++ b/src/config.h
@@ -254,7 +254,10 @@ HAVE_SOCKADDR_SA_LEN
 #define HAVE_SOCKADDR_SA_LEN
 /* Define before sys/socket.h is included so we get socklen_t */
 #define _BSD_SOCKLEN_T_
- 
+/* Select the RFC_3542 version of the IPv6 socket API. 
+   Define before netinet6/in6.h is included. */
+#define __APPLE_USE_RFC_3542 
+
 #elif defined(__NetBSD__)
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG