ruby-on-rails – Gem :: Installer :: ExtensionBuildError：ERROR：无法构建gem本机扩展ubuntu

在运行捆绑安装时,我在’pg’gem中收到以下错误,我更改了gem作为sqlite,那么也会有相同的错误.这是我的错误信息.

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /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:2:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/pg-0.16.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/pg-0.16.0/ext/gem_make.out

An error occurred while installing pg (0.16.0),and Bundler cannot continue.
Make sure that `gem install pg -v '0.16.0'` succeeds before bundling.

我试过apt-get安装libpg-dev gem安装pg -v’0.16.0’没有什么帮助我的

@H_502_6@