Gemfile

group :development do
  platforms :mri_18 do
    gem 'rbx-require-relative', '0.0.9', :require => nil
    gem 'linecache', '0.46', :require => nil
    gem 'ruby-debug', :require => nil
  end

  platforms :mri_19 do
    gem 'linecache19', '0.5.12', :require => nil
    gem 'ruby-debug19', :require => nil
  end
end