https://github.com/QingYun/tracer
https://github.com/qtproject/
http://www.zhihu.com/search?q=C%2B%2B%20%E5%BC%80%E6%BA%90%E9%A1%B9%E7%9B%AE&type=question
C++开源项目
原文：https://blog.51cto.com/u_9178859/3332520
