在OS X Yosemite上安装Compass
我正在尝试使用GEM安装指南针，但我有很多错误。
我的macbook pro正在运行OS X Yosemite。
有人有同样的问题吗？
感谢您的时间。 祝你今天愉快
sudo gem install compass Password: ERROR: Error installing compass: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20141019-17085-1dv9dek.rb extconf.rb /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin14/rbconfig.rb:213: warning: Insecure world writable dir /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.5/ext/ffi_c in PATH, mode 040777 checking for ffi.h... /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:549:in `block in try_compile' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:502:in `with_werror' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:549:in `try_compile' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:1044:in `block in have_header' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:895:in `block in checking_for' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:340:in `block (2 levels) in postpone' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:310:in `open' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:340:in `block in postpone' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:310:in `open' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:336:in `postpone' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:894:in `checking_for' from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:1043:in `have_header' from extconf.rb:16:in `' extconf failed, exit code 1 Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.5 for inspection. Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-14/2.0.0/ffi-1.9.5/gem_make.out 实际上，这似乎是通过命令行安装’Compass’成功解答接收错误“extconf failed，退出代码1”
你显然需要先安装开发工具（xcode-select –install），然后安装指南针
祝好运！
好吧，你不应该为一件事全局安装gem。 在你安装指南针和其他gem之前，我强烈推荐installng rbenv然后你想要的ruby版本。 然后，您可以在用户级别安装gem，而不必担心在用户之外的目录上设置写入权限。 – 在这种情况下似乎是问题所在。
只需按照此处的说明进行rbenv https://github.com/sstephenson/rbenv ，然后安装ruby构建插件https://github.com/sstephenson/ruby-build
只需以管理员身份从终端运行sudo chmod go-w /usr/local/ 。
这对我有用