用opencv3.1.0做ORBSLAM2运行一下命令时
cd ORB_SLAM2
chmod +x build.sh
./build.sh
出错：/usr/bin/ld: CMakeFiles/mono_tum.dir/Examples/Monocular/mono_tum.cc.o: undefined reference to symbol '_ZN2cv6String10deallocateEv'
/usr/local/lib/libopencv_core.so.3.1: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
解决办法：因为该ＯＲＢＳＬＡＭ２程序时用ＯＰＥＮＣＶ2.4.Ｘ写的，所以用opencv3.1.0时要改一下依赖包
具体做法：Instead of installing opencv again, just edit the cmakelists.txt (all) and remove version number written i.e. 2.4 from the OPENCV REQUIRED line.
即将ORBSLAM2文件夹下的CMakeLists.txt中的find_package(OpenCV 2.4.3 REQUIRED)改写成find_package(OpenCV 3.0.0 REQUIRED)，再运行
./build.sh
即可．
