运行时出现错误：
/home/myfly2/Downloads/qgroundcontrol/QGroundControl: error while loading shared libraries: libSDL2-2.0.so.0: cannot open shared object file: No such file or directory
解决办法：
sudo apt-get install libsdl2-dev
原文：http://www.cnblogs.com/ch122633/p/7400784.html