我正在尝试在Mavericks上运行一个相当旧的Rails应用程序，其中一个要求是： - Ruby ree-1.8.7-2009.10 - Rails 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。它的版本来自Homebrew（2.9.1）。
要安装此gem我使用以下命令：
$ CC=gcc-4.2 gem install libxml-ruby -v '1.1.4'
输出建议成功：
Building native extensions. This could take a while...
Successfully installed libxml-ruby-1.1.4
1 gem installed
虽然我尝试运行一些rake任务，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)
我尝试了很多可以在互联网上找到的方法（最相关的例子涉及安装Nokogiri的问题以及列出的类似错误），但没有一种方法有效。
答案 0 :(得分：1)
这是我在很长时间内在各种Mac OS上安装Rubies的方法。对我来说，任何图书馆或宝石都没有任何问题。例如，更复杂的 Nokogiri gem构建并且像魅力一样工作。
检查XCode版本
xcodebuild -version
xcode-select --install
根据文档安装Homebrew
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Ruby
rvm install 2.1 --disable-binary
答案 1 :(得分：0)
以前的版本可能会破坏本机加载，或者你的libxml2太新了，并且不适合gem实现。