find_package( PCL REQUIRED )
include_directories( ${PCL_INCLUDE_DIRS} ) # if we linked catkin libraries again this it will cause ld error;
link_directories(${PCL_LIBRARY_DIRS})
add_definitions(${PCL_DEFINITIONS})
add_executable(lasertocloud src/scantocloud.cpp)
target_link_libraries(lasertocloud ${PCL_LIBRARIES} ${catkin_LIBRARIES})
如果你 include了多个directories 的话也会报错 ld error 在VS就是link2005