Rubygame不工作：'；加载库'；：无法加载SDL

我尝试使用

sudo gem install rubygame

虽然安装工作正常，但当我尝试要求使用gem时，Ruby出现了以下错误：

/var/lib/gems/1.9.1/gems/nice-ffi-0.4/lib/nice-ffi/library.rb:98:in 'load_library': Could not load SDL. (LoadError)
    from /var/lib/gems/1.9.1/gems/ruby-sdl-ffi-0.4/lib/ruby-sdl-ffi/sdl.rb:51:in '<module:SDL>'
    from /var/lib/gems/1.9.1/gems/ruby-sdl-ffi-0.4/lib/ruby-sdl-ffi/sdl.rb:34:in '<top (required)>'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in 'require'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in 'require'
    from /var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame/main.rb:22:in '<top (required)>'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in 'require'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in 'require'
    from /var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:44:in 'block in <top (required)>'
    from /var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:29:in 'each'
    from /var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:29:in '<top (required)>'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in 'require'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in 'rescue in require'
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:35:in 'require'
    from /home/lakerking008/Ruby/Ruby Game Practice/Game.rb:2:in '<main>'

/var/lib/gems/1.9.1/gems/nice-ffi-0.4/lib/nice-ffi/library.rb:98:在“加载库”中：无法加载SDL。（加载错误）
from/var/lib/gems/1.9.1/gems/ruby-sdl-ffi-0.4/lib/ruby-sdl-ffi/sdl.rb:51:in''
from/var/lib/gems/1.9.1/gems/ruby-sdl-ffi-0.4/lib/ruby-sdl-ffi/sdl.rb:34:in''
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in'require'
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in'require'
from/var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame/main.rb:22:in''
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in'require'
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in'require'
from/var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:44:in'block in'
from/var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:29:in'each'
from/var/lib/gems/1.9.1/gems/rubygame-2.6.4/lib/rubygame.rb:29:in''
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in'require'
来自/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in'rescue in require'
from/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:35:in'require'
from/home/lakerking008/Ruby/Ruby游戏实践/Game.rb:2:in''

我在Ubuntu 13.04上运行

---

我做错什么了吗？如何修复此问题？

尝试安装以下软件包：

sudo apt-get install ruby ruby-dev irb ri rubygems
sudo apt-get install libsdl1.2-dev libsdl-gfx1.2-dev libsdl-image1.2-dev libsdl-mixer1.2-dev libsdl-ttf2.0-dev

---

您是否已采取此处解释的步骤=>？