Import RubyGems trunk revision 1493.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/ext/configure_builder.rb

@@ -0,0 +1,24 @@
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+require 'rubygems/ext/builder'
+
+class Gem::Ext::ConfigureBuilder < Gem::Ext::Builder
+
+  def self.build(extension, directory, dest_path, results)
+    unless File.exist?('Makefile') then
+      cmd = "sh ./configure --prefix=#{dest_path}"
+
+      run cmd, results
+    end
+
+    make dest_path, results
+
+    results
+  end
+
+end
+