From cfb59dde218fd8bd39fc9b2f7b0391fa8c97bf82 Mon Sep 17 00:00:00 2001
From: Eamonn Coughlan <eamonn@coughlan.de>
Date: Sat, 22 Jul 2017 22:53:12 +0200
Subject: [PATCH] Problem: can't set IPV6_V6ONLY on OpenBSD

Solution: skip setsockopt call resulting in EINVAL
---
 src/ip.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ip.cpp b/src/ip.cpp
index 22cf3317..eb0e1181 100644
--- a/src/ip.cpp
+++ b/src/ip.cpp
@@ -108,7 +108,7 @@ void zmq::enable_ipv4_mapping (fd_t s_)
 {
   (void) s_;
 
-#ifdef IPV6_V6ONLY
+#if defined IPV6_V6ONLY && !defined ZMQ_HAVE_OPENBSD
 #ifdef ZMQ_HAVE_WINDOWS
     DWORD flag = 0;
 #else