安装ffi（1.1.2）时发生错误，并且Bundler无法继续 [英] An error occured while installing ffi (1.1.2), and Bundler cannot continue

问题描述

在一个Rails 3.0项目中运行OSX Mountain Lion。

当试图在Rails项目中使用bundler更新我的gem时，出现以下错误：

 安装ffi（1.1.2）时发生错误，并且Bundler无法继续。 
确保在捆绑之前`gem install ffi -v'1.1.2'`成功。 
 
错误：安装ffi时出错：
错误：无法构建gem原生扩展。 
 
 /Users/victorstan/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb 
检查ffi.h ... *** extconf.rb失败*** 
由于某种原因无法创建Makefile，可能缺少
必需的库和/或头文件。查看mkmf.log文件以获取更多
的详细信息。您可能需要配置选项。 
 
 ... 
 
您必须先安装开发工具。 
  

我安装了XCode以及命令行工具。

  sudo ln -s / usr / bin / gcc /usr/bin/gcc-4.2 
  

另见发布在Mountain Lion上安装ImageMagick和rmagick 和 https://gist.github.com/1860511 。

Running OSX Mountain Lion, in a Rails 3.0 project.

When trying to update my gems with bundler in a Rails project i get the following errror:

An error occured while installing ffi (1.1.2), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.1.2'` succeeds before bundling.

ERROR:  Error installing ffi:
    ERROR: Failed to build gem native extension.

        /Users/victorstan/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb
checking for ffi.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

...

You have to install development tools first.

I have XCode installed as well as command line tools.

解决方案

You should use:

sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2

See also Issue with installing ImageMagick and rmagick on Mountain Lion and https://gist.github.com/1860511.

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