来源：https://ruby-china.org/topics/30243

在自己的os x系统上一直运行正常，包括正常使用nokogiri这个gem,今天

在本地建立新项目，bundle install 报nokogiri安装异常。

单独gem install nokogiri，报下面的错误：

Building native extensions. This could take a while... ERROR: Error installing nokogiri: ERROR: Failed to build gem native extension. current directory: /Users/jayzen/.rvm/gems/ruby-2.3.0/gems/nokogiri-1.6.8/ext/nokogiri /Users/jayzen/.rvm/rubies/ruby-2.3.0/bin/ruby -r ./siteconf20160610-32051-16q0bpc.rb extconf.rb Using pkg-config version 1.1.7 checking if the C compiler accepts ... yes checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no Building nokogiri using packaged libraries. Using mini_portile version 2.1.0 checking for iconv.h... yes checking for gzdopen() in -lz... yes checking for iconv using --with-opt-* flags... yes ************************************************************************ IMPORTANT NOTICE: Building Nokogiri with a packaged version of libxml2-2.9.4. Team Nokogiri will keep on doing their best to provide security updates in a timely manner, but if this is a concern for you and want to use the system library instead; abort this installation process and reinstall