* ext/extmk.rb (extmake): initialize $objs before extrace_makefile.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22721 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/extmk.rb

@@ -137,6 +137,7 @@ def extmake(target)
       }
       begin
 	$extconf_h = nil
+	$objs = []
 	ok &&= extract_makefile(makefile)
         old_objs = $objs
 	conf = ["#{$srcdir}/makefile.rb", "#{$srcdir}/extconf.rb"].find {|f| File.exist?(f)}