问题：
下载好包后，进行编译时候，报错如下
This workspace contains non-catkin packages in it, and catkin cannot build
a non-homogeneous workspace without isolation. Try the
‘catkin_make_isolated’ command instead.
方法：
方法就是…‘catkin_make_isolated’ command instead.，千万不要想复杂了，兄弟姐妹们。