安装ffi(1.1.2)时发生错误,Bundler无法继续

Question

在Rails 3.0项目中运行OSX Mountain Lion.

当尝试在Rails项目中使用bundler更新我的gem时,我得到以下错误:

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.

我安装了XCode以及命令行工具.

Answer 1

你应该使用:

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

另请参阅在Mountain Lion上安装ImageMagick和rmagick的问题以及https://gist.github.com/1860511.

Answer 2

如果您为 Xcode 重新安装命令行工具，它应该可以正常工作。这是这样做的链接：https : //developer.apple.com/downloads/index.action?=Command%20Line%20Tools%20%28OS%20X%20Mountain%20Lion%29