* configure.ac: Actually test whether libc has IPv6 support.
[backport candidate]
diff --git a/configure.ac b/configure.ac
index 9da0e0f..6aa0050 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])
@@ -802,6 +802,18 @@
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)
AC_EGREP_CPP(yes, [