我正在尝试在Mavericks上运行一个相当古老的Rails应用程序，其中一个要求是：- 红宝石-1.8.7-2009.10- 导轨 3.0.0- libxml-ruby 1.1.4（这是与其他宝石兼容的最新版本。
我安装了最新的 libxml2 软件包。它是来自Homebrew（2.9.1）的版本。
要安装此 gem，我使用了以下命令：
$ CC=gcc-4.2 gem install libxml-ruby -v '1.1.4'
输出建议的成功：
Building native extensions. This could take a while...
Successfully installed libxml-ruby-1.1.4
1 gem installed
虽然当我尝试运行一些 rake 任务时，即创建数据库 bundle exec rake db：create
我收到以下错误：
$ bundle exec rake db:create [ree-1.8.7-2009.10@mygemset]
rake aborted!
dlsym(0x7ffa2d83bbe0, Init_libxml_ruby): symbol not found - /Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/libxml-ruby-1.1.4/lib/libxml_ruby.bundle
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/libxml-ruby-1.1.4/lib/libxml_ruby.bundle
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:597:in `new_constants_in'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/libxml-ruby-1.1.4/lib/libxml.rb:9
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:597:in `new_constants_in'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/Developer/my-project/vendor/private_gems/restful_authentication-1.4.9/lib/sso/sso.rb:3
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:597:in `new_constants_in'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@mygemset/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/Users/myuser/Developer/my-project/vendor/private_gems/restful_authentication-1.4.9/lib/restful_sso_authentication.rb:2
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:76:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `each'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:72:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `each'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler/runtime.rb:61:in `require'
/Users/myuser/.rvm/gems/ree-1.8.7-2009.10@global/gems/bundler-1.5.2/lib/bundler.rb:131:in `require'
/Users/myuser/Developer/my-project/config/application.rb:5
/Users/myuser/Developer/my-project/Rakefile:6:in `require'
/Users/myuser/Developer/my-project/Rakefile:6
(See full trace by running task with --trace)
我尝试了许多可以在互联网上找到的方法（最相关的例子涉及安装Nokogiri的问题和列出的类似错误），但没有一个奏效。
这是我在
各种 Mac OS 上长时间安装 Rubies 的方法。对我来说，任何图书馆或宝石都没有问题。例如，更复杂的 Nokogiri 宝石就像一个魅力。
检查XCode版本
xcodebuild -version
xcode-select --install
根据文档安装自制软件
安装先决条件
brew doctor; # Just do what it wants!
brew update;
brew upgrade; # Watch out! for existing bottles
brew install libtool libxml2 libxslt openssl sqlite libyaml;
brew install autoconf automake apple-gcc42;
brew cleanup; # Watch out! for existing bottles
brew tap homebrew/dupes; # Watch out! for existing bottles
安装 RVM
curl -L https://get.rvm.io | bash -s stable # Latest stable
rvm get latest
rvm reload # :)
rvm autolibs enable
rvm requirements
安装红宝石
rvm install 2.1 --disable-binary
可能是以前的版本破坏了本机加载，或者您的 libxml2 太新并且不适合 gem 实现。
- 首先卸载所有以前的 Gem（宝石集、系统）
- 然后重新安装 gem
https://gist.github.com/unixcharles/1226596 ？