安装在Ubuntu上的Rails无法加载mkmf？

Question

我正在尝试在Ubuntu上安装Rails：

sudo gem install rails

但我遇到麻烦了：

Building native extensions.  This could take a while...
ERROR:  Error installing rails:
  ERROR: Failed to build gem native extension.

        /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:1:in `<main>'


Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/json-1.7.7 for inspection.
Results logged to /usr/lib/ruby/gems/1.9.1/gems/json-1.7.7/ext/json/ext/generator/gem_make.out

有什么问题吗？

Answer 1

正如丹尼尔在评论中所说，尝试执行sudo apt-get install ruby-dev

Answer 2

试试看，我已经在Ubuntu 12.4上安装成功了(您可以在安装过程中根据需要选择版本...)

1. sudo apt-get update
2. sudo apt-get install build-essential git-core curl libmysqlclient18
3. sudo bash -s稳定< <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer) umask g+w
4. 源umask-get安装构建-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libc6 bison chown -R useruser /usr/local/rvm示例: sudo chown -R rohitporwal:rohitporwal
5. 1.9.2
6. sudo gem install rails