From ab3aeba682460fd39deb7901aa69f976583c9f47 Mon Sep 17 00:00:00 2001
From: Michael Graff <mgraff@isc.org>
Date: Tue, 26 Jul 2011 21:59:13 +0000
Subject: [PATCH] fix for compiling on OSX Lion.  Verified it compiles on Snow
 Leopard using older XCode as well.

---
 configure.in | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index 2aef3b0d14..6d55410e87 100644
--- a/configure.in
+++ b/configure.in
@@ -18,7 +18,7 @@ AC_DIVERT_PUSH(1)dnl
 esyscmd([sed "s/^/# /" COPYRIGHT])dnl
 AC_DIVERT_POP()dnl
 
-AC_REVISION($Revision: 1.527 $)
+AC_REVISION($Revision: 1.528 $)
 
 AC_INIT(lib/dns/name.c)
 AC_PREREQ(2.59)
@@ -267,6 +267,14 @@ case "$host" in
 		STD_CDEFINES="$STD_CDEFINES -D_GNU_SOURCE"
 		CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
 		;;
+	#
+	# Starting with OSX 10.7 (Lion) we must choose which IPv6 API to use.
+	# Setting this is sufficient to select the correct behavior for BIND 9.
+	#
+	*-darwin*)
+	  STD_CDEFINES="$STD_CDEFINES -D__APPLE_USE_RFC_3542"
+	  CPPFLAGS="$CPPFLAGS -D__APPLE_USE_RFC_3542"
+	  ;;
 esac
 
 AC_HEADER_STDC