`require': 没有要加载的文件 -- mkmf (LoadError) [英] `require': no such file to load -- mkmf (LoadError)

问题描述

我正在尝试使用 ruby​​1.9.1 在 Ubuntu Natty Narwhal 11.04 上安装 rails.

I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.

我使用包含开发包的 apt-get install ruby​​1.9.1-full 安装了 ruby​​.我用谷歌搜索了这个错误，所有人都建议我安装我已经拥有的 1.9.1-dev.

I installed ruby using apt-get install ruby1.9.1-full which contains the dev package. I googled the error and all have suggested I install the 1.9.1-dev which I already have.

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

        /usr/bin/ruby1.8 extconf.rb
extconf.rb:36:in `require': no such file to load -- mkmf (LoadError)
    from extconf.rb:36


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out

推荐答案

在寻找解决方案后发现需要 -dev 包，而不仅仅是 ruby1.8.所以如果你有 ruby1.9.1 做

After some search for a solution it turns out the -dev package is needed, not just ruby1.8. So if you have ruby1.9.1 doing

sudo apt-get install ruby1.9.1-dev

或安装通用 ruby​​ 版本，使用(根据@lamplightdev 评论):

or to install generic ruby version, use (as per @lamplightdev comment):

sudo apt-get install ruby-dev

应该修复它.

尝试 locate mkmf 以查看文件是否确实存在.

Try locate mkmf to see if the file is actually there.

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