From 850d39f3409fd9f942a9796dbe95b9e1f3c8ac5b Mon Sep 17 00:00:00 2001
From: hasso <hasso>
Date: Thu, 30 Jun 2005 13:52:20 +0000
Subject: 	* configure.ac: Actually test whether libc has IPv6 support.

	[backport candidate]
---
 ChangeLog    |  4 ++++
 configure.ac | 14 +++++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 55e3c81b..3ea62553 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2005-06-30 Louis Lagendijk <louis.lagendijk@gmail.com>
+
+	* configure.ac: Actually test whether libc has IPv6 support.
+
 2005-06-28 Paul Jakma <paul.jakma@sun.com>
 
 	* INSTALL.quagga.txt: GNU make is required now, because of manual
diff --git a/configure.ac b/configure.ac
index 9da0e0fe..6aa0050d 100755
--- a/configure.ac
+++ b/configure.ac
@@ -5,7 +5,7 @@
 ##  Copyright (c) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
 ##  Portions Copyright (c) 2003 Paul Jakma <paul@dishone.st>
 ##
-## $Id: configure.ac,v 1.108 2005/05/13 20:11:53 paul Exp $
+## $Id: configure.ac,v 1.109 2005/06/30 13:52:20 hasso Exp $
 AC_PREREQ(2.53)
 
 AC_INIT(Quagga, 0.99.1, [http://bugzilla.quagga.net])
@@ -801,6 +801,18 @@ dnl ----------
     fi
   fi
 
+  if test "$zebra_cv_linux_ipv6" = "yes";then
+    AC_MSG_CHECKING(whether libc has IPv6 support)
+    AC_TRY_LINK([#include <netinet/in.h>
+    ],[ int a; a = (int) in6addr_any.s6_addr[0]; if (a != 12345) return a; ],
+    [AC_MSG_RESULT(yes)
+      zebra_cv_ipv6=yes
+      zebra_cv_linux_ipv6=yes],
+    [AC_MSG_RESULT(no)
+      zebra_cv_ipv6=no
+      zebra_cv_linux_ipv6=no])
+  fi
+
   if test "$zebra_cv_linux_ipv6" = "yes";then
     AC_MSG_CHECKING(for GNU libc >= 2.1)
     AC_DEFINE(HAVE_IPV6,1,Linux IPv6)
-- 
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