无法设置ruby环境 – 安装fii gem错误
我正在尝试为ruby项目设置环境。 但是当我运行’bundle’时，我在安装’fii’gem时遇到错误：
Installing ffi (1.8.1) Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /Users/bmalets/.rvm/rubies/ruby-1.9.3-p448/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. /Users/bmalets/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. Gem files will remain installed in /Users/bmalets/.rvm/gems/ruby-1.9.3-p448@api2/gems/ffi-1.8.1 for inspection. Results logged to /Users/bmalets/.rvm/gems/ruby-1.9.3-p448@api2/gems/ffi-1.8.1/ext/ffi_c/gem_make.out An error occurred while installing ffi (1.8.1), and Bundler cannot continue. Make sure that `gem install ffi -v '1.8.1'` succeeds before bundling.
我的环境：
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OS_X 10.8.4
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ruby1.9.3p448
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Xcode 4.6.3
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libffi-3.0.13
请帮我修理一下。
确保您已安装Apple Xcode和命令行工具（请参阅此屏幕截图）：
https://developer.apple.com/technologies/tools/
之后，不要忘记安装libffi。
1）如果你使用自制软件
brew install libffi
2）如果你使用macport
sudo port install libffi