【发布时间】：2014-03-17 16:30:12
【问题描述】：
我想使用Ruby 2.1.1p76 和Rails 4.1.0beta1。我在使用 RVM 时遇到了一些错误。我使用的是 Ruby 2.0.0 和 Rails 4.0.0。我升级到 OS X Mavericks 10.9.2 并且需要重新加载所有内容。
不管怎样，这些都是我正在运行的命令。
\curl -sSL https://get.rvm.io | bash -s stable --ruby
这安装成功。然后我运行这个命令来安装 rails。
sudo gem install rails
我收到以下错误，说它正在寻找 libyaml。
/Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': dlopen(/Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/x86_64-darwin13.0/psych.bundle, 9): Library not loaded: /usr/local/lib/libyaml-0.2.dylib (LoadError)
Referenced from: /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/x86_64-darwin13.0/psych.bundle
Reason: image not found - /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/x86_64-darwin13.0/psych.bundle
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/psych.rb:1:in `<top (required)>'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/yaml.rb:5:in `<top (required)>'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems.rb:616:in `load_yaml'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/config_file.rb:328:in `load_file'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/config_file.rb:197:in `initialize'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/gem_runner.rb:74:in `new'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/gem_runner.rb:74:in `do_configuration'
from /Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/gem_runner.rb:39:in `run'
from /Users/username/.rvm/rubies/ruby-2.1.1/bin/gem:21:in `<main>'
所以，我运行了这个已弃用的命令。
rvm pkg install libyaml
这给了我一个弃用警告，并说要检查 autolibs。
所以我更正并验证了两者。
brew install libyaml
##
Warning: libyaml-0.1.4 already installed
更多...
brew info libyaml
##
libyaml: stable 0.1.5 (bottled)
http://pyyaml.org/wiki/LibYAML
/usr/local/Cellar/libyaml/0.1.4 (7 files, 344K) *
Built from source
From: https://github.com/mxcl/homebrew/commits/master/Library/Formula/libyaml.rb
==> Options
--universal
安装自动库。
rvm get stable --autolibs=enable
rvm install ruby
rvm --default use ruby-2.1.1
然后，我得到同样的错误。
Using /Users/username/.rvm/gems/ruby-2.1.1
/Users/username/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/yaml.rb:4:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
【问题讨论】：
标签： ruby-on-rails ruby rvm