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我被这个问题困住了。osx rvm ruby 1.8.7 nokogiri 1.4.1 - 错误：无法构建gem原生扩展
cat ~/.rvm/gems/ruby-1.8.7-p249/gems/nokogiri-1.4.1/ext/nokogiri/mkmf.log
给出了这样的错误（限幅）
conftest.c:3: error: 'xmlParseDoc' undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
对于被在系统中找到几个库。
如果我手动进入
~/.rvm/gems/ruby-1.8.7-p249/gems/nokogiri-1.4.1/ext/nokogiri/
编译并安装一切顺利
ruby extconf.rb
make
make install
mkdir -p /Users/tommasop/.rvm/rubies/ruby-1.8.7-p249/lib/ruby/site_ruby/1.8/i686-darwin9.8.0/nokogiri
/usr/bin/install -c -m 0755 nokogiri.bundle /Users/tommasop/.rvm/rubies/ruby-1.8.7-p249/lib/ruby/site_ruby/1.8/i686-darwin9.8.0/nokogiri
除了脚本/服务器：
→ script/server --debugger
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. Use #requirement
The following gems have native components that need to be built
nokogiri
You're running:
ruby 1.8.7.249 at /Users/tommasop/.rvm/rubies/ruby-1.8.7-p249/bin/ruby
rubygems 1.3.6 at /Users/tommasop/.rvm/gems/ruby-1.8.7-p249, /Users/tommasop/.rvm/gems/ruby-1.8.7-p249%global
Run `rake gems:build` to build the unbuilt gems.
任何帮助，不胜感激！