From 6a894686d604f62b08da02cd89cd231e5260684c Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 30 Nov 2011 03:20:04 +0000
Subject: [PATCH] Fix r33904.

It breaks following tests if RUBYOPT=-w
* test_class_build(TestGemExtExtConfBuilder)
* test_class_build_rbconfig_make_prog(TestGemExtExtConfBuilder)
* test_class_build_env_make(TestGemExtExtConfBuilder)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/mkmf.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 846db8bd72..3792da5e4b 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -53,6 +53,8 @@ module MakeMakefile
   $static = nil
   $config_h = '$(arch_hdrdir)/ruby/config.h'
   $default_static = $static
+  $OBJEXT = nil
+  $ignore_error = ''
 
   unless defined? $configure_args
     $configure_args = {}