所以我开始了一个与Compass＆amp; amp;与Susy。在那里iMac上的一切都运行良好，我想将文件传输到我的笔记本电脑，在家里做一些工作。我从FTP获取文件然后尝试在目录上运行compass watch但是收到错误bc未安装Susy。所以我安装了Susy。然后我尝试再次观看，我收到错误：
Gem::ConflictError on line ["2099"] of /Library/Ruby/Site/2.0.0/rubygems/specification.rb: Unable to activate susy-2.1.3, because sass-3.2.19 conflicts with sass (< 3.5, >= 3.3.0)
所以，我喜欢，好吧，这不应该很难解决。谷歌搜索，每个人都对gem install compass --pre说。我喜欢，好吧，我会那样做的。我的屁股出错了。我尝试下载xcode命令行工具，rvm要求，没有什么对我有用。错误输出代码是这样的：
Building native extensions. This could take a while...
/Library/Ruby/Site/2.0.0/rubygems/ext/builder.rb:73: warning: Insecure world writable dir /Users/jaylaiche/.rvm in PATH, mode 040777
ERROR: Error installing compass:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20140729-74623-1y0hghc.rb extconf.rb
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/mkmf.rb:1500: warning: Insecure world writable dir /Users/jaylaiche/.rvm in PATH, mode 040777
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.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
--with-ffi_c-dir
--without-ffi_c-dir
--with-ffi_c-include
--without-ffi_c-include=${ffi_c-dir}/include
--with-ffi_c-lib
--without-ffi_c-lib=${ffi_c-dir}/
--with-libffi-config
--without-libffi-config
--with-pkg-config
--without-pkg-config
/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 `<main>'
extconf failed, exit code 1
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.3 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/ffi-1.9.3/gem_make.out
我尝试导航到运行emacs ~/.rvm/gems/ruby-1.9.3-p0/gems/compass/ext/mkmf.log的日志，但没有。
任何人都可以拯救我的灵魂吗？并解释这里发生了什么？我想了解，以便我不再遇到这个问题。我只是没有看到这种情况的简单解释，特别是考虑到我可以安装罗盘＆＃39;很好，但是宝石安装指南针--pre＆＃39;不会工作。提前谢谢了。