rubyinstaller 1.9.3
eclipse Kepler
marketplace ruby dltk 5.0
ruby devkit(Ruby 1.8.7 and 1.9.3) DevKit-tdm-32-4.5.2-20111229-1559-sfx.exe
需要nmake在PATH内，或启动vs命令行执行一下命令
gem install ruby-debug-base19x -v 0.11.30.pre3

参考
http://stackoverflow.com/questions/8835522/unable-to-install-gem-ruby-debug19-on-win7-with-installd-ruby-1-9-2-and-1-9-3
https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
https://github.com/jekyll/jekyll/issues/1409

ruby eclipse调试