我按照readme文件，运行命令catkin_make,结果出现错误说无法找到 include：catkin_package() include dir 'include' does not exist relative to
  '/home/tongbaiming/Guidance-SDK-master/demo/obstacle_bypass/balance_strategy/src/dji_sdk'

我在dji_sdk下自己建立了一个空的include文件后，再次catkin_make，说：
dji_sdk_node.cpp:660:6: error: ‘ctrl_strat’ was not declared in this scope
   if(ctrl_strat != NONE)
      ^

dji_sdk_node.cpp:660:20: error: ‘NONE’ was not declared in this scope
   if(ctrl_strat != NONE)
                    ^

想请教这是怎么回事？