default.mspec: use RbConfig::CONFIG

* spec/default.mspec (config): use RbConfig::CONFIG directly,
  loading with fake.rb.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49604 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/default.mspec

@@ -1,3 +1,5 @@
+# -*- ruby -*-
+load "./rbconfig.rb"
 load File.dirname(__FILE__) + '/rubyspec/ruby.2.2.mspec'
 class MSpecScript
   builddir = Dir.pwd
@@ -7,7 +9,7 @@ class MSpecScript
       f.read[/^\s*srcdir\s*=\s*(.+)/i] and srcdir = $1
     }
   end
-  config = proc{|name| `#{builddir}/miniruby -I#{srcdir} -r#{builddir}/rbconfig -e 'print RbConfig::CONFIG["#{name}"]'`}
+  config = RbConfig::CONFIG
 
   # The default implementation to run the specs.
   set :target, File.join(builddir, "miniruby#{config['exeext']}")