rake config
(in /home/kiba/rubygame/trunk)
ruby setup.rb config
---> lib
---> lib/rubygame
<--- lib/rubygame
<--- lib
---> ext
---> ext/rubygame
/usr/bin/ruby1.8 /home/kiba/rubygame/trunk/ext/rubygame/extconf.rb
/home/kiba/rubygame/trunk/ext/rubygame/extconf.rb:3:in `require': no such file to load -- mkmf (LoadError)
        from /home/kiba/rubygame/trunk/ext/rubygame/extconf.rb:3
setup.rb:535:in `command': 'system /usr/bin/ruby1.8 /home/kiba/rubygame/trunk/ext/rubygame/extconf.rb ' failed (RuntimeError)
        from setup.rb:1112:in `extconf'
        from setup.rb:1107:in `config_dir_ext'
        from setup.rb:1321:in `__send__'
        from setup.rb:1321:in `traverse'
        from setup.rb:1338:in `dive_into'
        from setup.rb:1319:in `traverse'
        from setup.rb:1323:in `traverse'
        from setup.rb:1322:in `each'
         ... 8 levels...
        from setup.rb:710:in `__send__'
        from setup.rb:710:in `invoke'
        from setup.rb:674:in `invoke'
        from setup.rb:1352
rake aborted!
Command failed with status (1): [ruby setup.rb config]
/home/kiba/rubygame/trunk/Rakefile:47
(See full trace by running task with --trace)