需要的文件 libxxxx.so 、xxxx.h
记住 复制文件的时候千万不要用ROOT权限，不然编译时会找不到这个共享库。最好时把库放到/usr/lib
chmod 777
chown username
CMakeLists.txt写法：
link_directories(/home/yanlei/catkin_new/src/motordriver/include/motordriver)#这个放在add_excutable前面
## Specify libraries to link a library or executable target against
target_link_libraries(${PROJECT_NAME}_node libEposCmd.so)
#这个放在add_excutable后面
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