/usr/local/bin/ruby extconf.rb

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Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/local/bin/ruby extconf.rb


原因:缺少zlib;

解决办法:安装zlib1g 和 zlib1g-dev 包,然后
1)回到ruby源码目录/ext/zlib 下
2)ruby extconf.rb
3)make

4)sudo make install



cannot load such file -- readline (LoadError)

解决方法

cd ruby-1.9.3-p362/ext/readline/

make install