捆绑安装失败安装ffi（1.9.6）

Question

ON ubuntu 12.04 Drupalpro Development VM

Gem :: Installer :: ExtensionBuildError：错误：无法构建gem原生扩展。

            /usr/bin/ruby1.9.1 extconf.rb 
    /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
        from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from extconf.rb:4:in `<main>'


    Gem files will remain installed in /tmp/bundler20150224-3385-1j3fayi/ffi-1.9.6/gems/ffi-1.9.6 for inspection.
    Results logged to /tmp/bundler20150224-3385-1j3fayi/ffi-1.9.6/gems/ffi-1.9.6/ext/ffi_c/gem_make.out
    An error occurred while installing ffi (1.9.6), and Bundler cannot continue.
    Make sure that `gem install ffi -v '1.9.6'` succeeds before bundling.

Answer 1

好看完这个问题 Answer for `require': no such file to load -- mkmf (LoadError)

1. 找出使用$ruby -v
的ruby版本
2. 我的红宝石1.8.7
3. 然后按$ sudo apt-get install ruby1.8.7-dev
安装此版本的开发版

安装开发版后，捆绑器将正常工作