From f73eaeb3a662f7d8ca3d2c18ce48915437187afe Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 12 Aug 2009 12:10:10 +0000
Subject: [PATCH] 	* ext/socket/extconf.rb: if ipv6 is enabled, the
 version of Windows 	  most be XP or later. 	  [ruby-core:24601]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24517 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog             | 6 ++++++
 ext/socket/extconf.rb | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 180ccd1d27..82eba1f742 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Aug 12 21:07:46 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ext/socket/extconf.rb: if ipv6 is enabled, the version of Windows
+	  most be XP or later.
+	  [ruby-core:24601]
+
 Wed Aug 12 15:59:29 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* common.mk (yes-test-knownbug): use RUNRUBY instead of MINIRUBY.
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 21f99b9848..1d233fdd1f 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -52,6 +52,9 @@ EOF
 end
 
 if ipv6
+  if $mingw
+    $CPPFLAGS << " -D_WIN32_WINNT=0x501"
+  end
   ipv6lib = nil
   class << (fmt = "unknown")
     def %(s) s || self end