From e1dfaaf786dc6bc3a4de85a920f4918a58ebfc74 Mon Sep 17 00:00:00 2001
From: Fabio Alessandrelli <fabio.alessandrelli@gmail.com>
Date: Sun, 30 Oct 2016 22:58:15 +0100
Subject: [PATCH] Define IPV6_V6ONLY flag if not defined on windows (old mingw
 versions)

(cherry picked from commit bdc7ca84cac727f3f94663f23e1229450230bd2e)
---
 drivers/unix/socket_helpers.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/unix/socket_helpers.h b/drivers/unix/socket_helpers.h
index 80e013ad68a..9693911acd6 100644
--- a/drivers/unix/socket_helpers.h
+++ b/drivers/unix/socket_helpers.h
@@ -3,6 +3,13 @@
 
 #include <string.h>
 
+#ifdef WINDOWS_ENABLED
+ // Workaround mingw missing flags!
+ #ifndef IPV6_V6ONLY
+  #define IPV6_V6ONLY 27
+ #endif
+#endif
+
 // helpers for sockaddr -> IP_Address and back, should work for posix and winsock. All implementations should use this
 
 static size_t _set_sockaddr(struct sockaddr_storage* p_addr, const IP_Address& p_ip, int p_port) {