compilation error

[qlibp]

The compilation order of CMake's add_subdirectory() may result in compilation error.

velodyne_msgs are found by catkin, the cmake invoke compilation on tools folder before common folder, which results in the following error(I guess)

[gaoxiang12]

Looks like I should let the sad.common depend on lidar messages. I'll look into it.

[qlibp]

Already verified, once I comment out the add_subdirectory(tools) line first, and compile the code, the messages will generate successfully.

[qlibp]

Also, can't build objects with g2o successfully. I try two ways to build the entire project.

1. build at the {project_src}/build, and trigger an error
2. I run cmake .. & make inside thirdparty/g2o/build and I can't build the whole project still.

[qlibp]

Also, can't build objects with g2o successfully. I try two ways to build the entire project.

1. build at the {project_src}/build, and trigger an error
2. I run cmake .. & make inside thirdparty/g2o/build and I can't build the whole project still.

I don't know which g2o/config.h am I missing, I grep the entire folder and find out that it's within thirdparty/g2o/build/
So, I add an additional line of include_directory() in cmake/packages.cmake to make it compiled.

If I get it wrong, plz correct me.

[aqiuxx]

sudo apt install ros-noetic-velodyne-msgs