问题 使用catkin build时报错,出现 The build space at '/home/abc/catkin_ws/build' was previously built by 'catkin_make'. Please remove the build space or pick a different build space. 解决方法 输入 rm devel bui
-- Could NOT find PY_em (missing: PY_EM) CMake Error at /opt/ros/noetic/share/catkin/cmake/empy.cmake:30 (message):Unable to find either executable 'empy' or Python module 'em'... tryinstalling the