无法构建gem原生扩展（em-irc）

Question

尝试安装em-irc，得到了：

/usr/bin/ruby1.9.1 extconf.rb
/usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:2:in `<main>'

Answer 1

尝试以root身份运行：sudo gem install em-irc