How to use MRPT?

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Hi! I have down load and compile the MRPT following the website:github.com/mrpt-ros-pkg/mrpt_common ,when I compile an ros package, error occur:CMake Error at /opt/ros/groovy/share/catkin/cmake/catkinConfig.cmake:72 (find_package): Could not find a configuration file for package mrpt_libs.

Set mrpt_libs_DIR to the directory containing a CMake configuration file for mrpt_libs. The file will have one of the following names:

mrpt_libsConfig.cmake mrpt_libs-config.cmake I don't no what's wrong, and I am not sure the ROS_PACKAGE_PATH I set is right:export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:home/keith/mrpt_common.I had set several path,such as usr/share/doc,usr/include/mrpt,but they don't help. Looking for your help,thank you!