The cross compilation environment appears So link file not found problem

problem ：/opt/rk3308-32bit-cross-complier/bin/../lib/gcc/arm-rockchip-linux-gnueabihf/6.4.0/../../../../arm-rockchip-linux-gnueabihf/bin/ld: warning: libmrpt-graphs.so.1.5, needed by /opt/arm/3308/mrpt/lib/libmrpt-maps.so, not found (try using -rpath or -rpath-link)

The compilation error is because ：libmrpt-maps.so Cannot link to libmrpt-graphs.so.1.5 The library of

The solution is CMakeLists.txt Add link library directive ：

set(MRPT_LIBRARIES_DIRS /opt/arm/3308/mrpt/lib)

target_link_libraries(mapgen_mrpt
  ${catkin_LIBRARIES}
  ${MRPT_LIBS}
  ${MRPT_LIBRARIES_DIRS}/libmrpt-graphs.so.1.5 # Mainly this document 
)