From 76cc4ace703ef4ec9dce351d02473ea3f35d3df8 Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Thu, 24 Apr 2014 09:28:31 +0000
Subject: [PATCH] Work without IFA_F_OPTIMISTIC on Linux.

---
 ipv6.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ipv6.c b/ipv6.c
index 3d502b8a..5b18f850 100644
--- a/ipv6.c
+++ b/ipv6.c
@@ -36,7 +36,11 @@
 #  include <asm/types.h> /* for systems with broken headers */
 #  include <linux/rtnetlink.h>
    /* Match Linux defines to BSD */
-#  define IN6_IFF_TENTATIVE	(IFA_F_TENTATIVE | IFA_F_OPTIMISTIC)
+#  ifdef IFA_F_OPTIMISTIC
+#    define IN6_IFF_TENTATIVE	(IFA_F_TENTATIVE | IFA_F_OPTIMISTIC)
+#  else
+#    define IN6_IFF_TENTATIVE   IFA_F_TENTATIVE
+#  endif
 #  define IN6_IFF_DUPLICATED	IFA_F_DADFAILED
 #  define IN6_IFF_DETACHED	0
 #else
-- 
2.47.3