Ruby on rails Post OS X 10.10 Yosemite安装Rails错误

我安装了Mac OS Yosemite，但现在Rails无法正常工作

当我尝试执行

rails s

时，它会告诉我执行

捆绑安装

我在尝试运行

捆绑安装
后收到此消息：

Errno::EACCES: Permission denied - /Users/giowong/rails_project/doctible_pre_treatment/vendor/bundle/ruby/2.0.0/gems/bcrypt-3.1.7/.gitignore

是的

及

当我这样做的时候，我得到了这些讨厌的东西：

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20141107-39214-1ds3j4x.rb extconf.rb 
checking for ruby/util.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
  /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:14:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in      /Users/giowong/rails_project/doctible_pre_treatment/vendor/bundle/ruby/2.0.0/gems/bcrypt-3.1.7 for inspection.

 Results logged to     /Users/giowong/rails_project/doctible_pre_treatment/vendor/bundle/ruby/2.0.0/extensions/universal-darwin-14/2.0.0/bcrypt-3.1.7/gem_make.out
 An error occurred while installing bcrypt (3.1.7), and Bundler cannot continue.
 Make sure that `gem install bcrypt -v '3.1.7'` succeeds before bundling.

但是没有运气
 我不建议使用OSX提供的默认Ruby，因此请安装RVM。您还需要安装Xcode命令行工具：

xcode-select --install # click install, not Get Xcode

然后验证是否安装了gcc：

gcc --version

然后才运行：

\curl -sSL https://get.rvm.io | bash -s stable --rails

是RVM的一个有价值的替代方案；当你使用
sudo
安装gem时，你是在修改苹果安装的Ruby，所以不要这样做，让系统使用它。相反，使用Ruby版本管理器，如或。而且，无论使用哪种方法，在为他们管理的Ruby安装任何东西时，都不要使用
sudo
，否则会造成严重的混乱。如果您使用RVM，请阅读整个安装说明，以便了解您应该做什么。
xcode-select --install # click install, not Get Xcode

gcc --version

\curl -sSL https://get.rvm.io | bash -s stable --rails