未能在乌班图 14 上安装 mysql2 gem

Question

我正在运行Ubuntu 14，当我尝试运行铁路服务器时，但我收到此错误：

找不到gem的mysql2(

所以我运行< code>bundle install,然后我得到以下错误。

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/bin/ruby2.1 extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.1.0/gems/mysql2-0.3.16 for inspection.
Results logged to /var/lib/gems/2.1.0/extensions/x86_64-linux/2.1.0/mysql2-0.3.16/gem_make.out
An error occurred while installing mysql2 (0.3.16), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.16'` succeeds before bundling.

因此，我运行了gem install mysql2-v‘0.3.16'，它成功安装了，但是当我再次运行bundle install时，它会给我同样的错误：

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/bin/ruby2.1 extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.1.0/gems/mysql2-0.3.16 for inspection.
Results logged to /var/lib/gems/2.1.0/extensions/x86_64-linux/2.1.0/mysql2-0.3.16/gem_make.out
An error occurred while installing mysql2 (0.3.16), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.16'` succeeds before bundling.

Answer 1

从头开始，这次你应该安装RVM，因为它非常擅长为你处理所有这些东西。http://rvm.io/rvm/install

确保首先获得所有依赖项，此代码将检查您拥有和没有的依赖项：

for name in {bash,awk,sed,grep,ls,cp,tar,curl,gunzip,bunzip2,git,svn} ; do which $name ;  done

它还值得一看先决条件页面：http://rvm.io/rvm/prerequisites

您可以运行下面的代码来安装带有Ruby 2.1.1和Rails的rvm:

\curl -sSL https://get.rvm.io | bash -s stable --rails

然后，要开始使用 RVM：”

/bin/bash --login

它绝对值得使用RVM，它会让你在管理你的ruby版本，gems等的时候更容易，只要确保你通读了网页，这样你就知道如何使用它。