In file included from /home/firmament/codes/24navigation/src/livox_ros_driver2/src/driver_node.h:28,
                 from /home/firmament/codes/24navigation/src/livox_ros_driver2/src/lddc.h:31,
                 from /home/firmament/codes/24navigation/src/livox_ros_driver2/src/lddc.cpp:25:
/home/firmament/codes/24navigation/src/livox_ros_driver2/src/include/ros_headers.h:28: warning: "BUILDING_ROS2" redefined
   28 | #define BUILDING_ROS2
      | 
<command-line>: note: this is the location of the previous definition