交叉编译环境出现.so链接文件找不到问题

问题：/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)

编译出错是因为：libmrpt-maps.so链接不到libmrpt-graphs.so.1.5的库

解决办法在CMakeLists.txt添加链接库指令：

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 #主要是这个文件
)