From 4f6703203b73c2dcec29b1bd851ae938177fee02 Mon Sep 17 00:00:00 2001
From: rhykw <dev@rhykw.net>
Date: Sat, 28 May 2016 09:33:53 +0900
Subject: TCPServer use SO_REUSEADDR if possible

---
 mrblib/socket.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mrblib/socket.rb b/mrblib/socket.rb
index d5dbda806..a32a3334d 100644
--- a/mrblib/socket.rb
+++ b/mrblib/socket.rb
@@ -262,7 +262,9 @@ class TCPServer
     ai = Addrinfo.getaddrinfo(host, service, nil, nil, nil, Socket::AI_PASSIVE)[0]
     @init_with_fd = true
     super(Socket._socket(ai.afamily, Socket::SOCK_STREAM, 0), "r+")
-    self.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, true)
+    if Socket.const_defined?(:SO_REUSEADDR)
+      self.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, true)
+    end
     Socket._bind(self.fileno, ai.to_sockaddr)
     listen(5)
     self
-- 
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