centos使用ruby gem安装 libv8，安装v8js

转自：http://appsintheopen.com/posts/18-installing-the-libv8-ruby-gem-on-centos-5-8php   首先安装 ruby gem  yum install -y ruby   First, Centos 5.8 ships with gcc 4.1.4, but to compile libv8 you need 4.4. Lu

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