说明：  来源：IBM developWorks 大牛原创； 简介：结合实际经验，讲解如何从零开始构建一个基于GCC的跨平台编译器，及如何使用； 特点：简洁（有效内容只有十页左右，大约半小时阅读完）、实用、权威。
(source: IBM developWorks, by experienced developer; introduction: How to build a gcc-based cross compiler from zero and how to use it, with the developer's working experience. feature: short(10 pages and can be finished in half an hour); contact: one five six five two two four zero sev three sev of wechat. Enjoy!)