升级山狮后无法安装某些宝石 [英] Not able to install some gems after mountain lion upgrade

问题描述

我刚刚将Macbook更新为Mountain Lion，但是由于下面有关标题的错误，我现在无法安装一些gems.我环顾四周，这似乎与缺少Ruby标头有关.建议安装Xcode，因此我从应用程序商店安装了完整的Xcode，还安装了Xcode命令行工具.但是仍然没有运气.有什么建议吗?

I just updated my Macbook to Mountain Lion, but now I'm not able to install some gems, because of the below error about headers. I looked around and it seems to have to do with Ruby headers missing. It was suggested to install Xcode, so I installed the full Xcode from the app store and also the Xcode command line tools. But still no luck. Any suggestions?

ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
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.

推荐答案

请确保安装Xcode的命令行工具.

Be sure to install Xcode's Command-Line Tools.

此提示帮助我解决了此问题:

This hint helped me with this issue:

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

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