From 3e5bff7ec18cb834f7e05ed5f973edd35f990617 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 13 Nov 2011 06:41:19 +0000
Subject: * ext/dbm/extconf.rb: duplicate $libs and $defs when save them.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/dbm/extconf.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'ext/dbm')

diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
index f8139495d3..302b5517a5 100644
--- a/ext/dbm/extconf.rb
+++ b/ext/dbm/extconf.rb
@@ -29,8 +29,8 @@ headers.found = []
 headers.defs = nil
 
 def headers.db_check(db)
-  old_libs = $libs
-  old_defs = $defs
+  old_libs = $libs.dup
+  old_defs = $defs.dup
   result = db_check2(db)
   if !result
     $libs = old_libs
-- 
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