undefined reference to `cv::Mat::updateContinuityFlag()'

[ysingfun]

系统： ubuntu 18.04 ros版本： Melodic

我在编译该仓库的时候，始终遇到下面问题：

/usr/include/pcl-1.8/pcl/sample_consensus/model_types.h:99:3: note: declared here [100%] Linking CXX executable /home/pmj/catkin_ws/devel/lib/loam_livox/livox_laserMapping CMakeFiles/livox_laserMapping.dir/source/laser_mapping.cpp.o: In functionvoid cv::eigen2cv<float, -1, -1, 0, -1, -1>(Eigen::Matrix<float, -1, -1, 0, -1, -1> const&, cv::Mat&)': /usr/local/include/opencv2/core/mat.inl.hpp:521: undefined reference to cv::Mat::updateContinuityFlag()' CMakeFiles/livox_laserMapping.dir/source/laser_mapping.cpp.o: In functionMaps_keyframe::apply_guassian_blur(Eigen::Matrix<float, -1, -1, 0, -1, -1> const&, int, float)': /usr/local/include/opencv2/core/mat.inl.hpp:521: undefined reference to `cv::Mat::updateContinuityFlag()' collect2: error: ld returned 1 exit status loam_livox/CMakeFiles/livox_laserMapping.dir/build.make:439: recipe for target '/home/pmj/catkin_ws/devel/lib/loam_livox/livox_laserMapping' failed make[2]: [/home/pmj/catkin_ws/devel/lib/loam_livox/livox_laserMapping] Error 1 CMakeFiles/Makefile2:1523: recipe for target 'loam_livox/CMakeFiles/livox_laserMapping.dir/all' failed make[1]: [loam_livox/CMakeFiles/livox_laserMapping.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j4 -l4" failed

我在网上查到如下解决方案： 修改 find_package(OpenCV 3.4.2 REQUIRED)，我已经编译过该版本的opencv，并默认安装路径在/usr/local,但依然报上面的错误。

`

[CrisGao]

The livox_laserMapping miss linked to Opencv library， just appened the ${OpenCV_LIBS}to the target_link_libraries,liked below: target_link_libraries(livox_laserMapping ${catkin_LIBRARIES} ${PCL_LIBRARIES} ${CERES_LIBRARIES} ${OpenCV_LIBS})

[ysingfun]

It is caused by the problem of the opencv version. Opencv3.2 is pre-installed on my linux system, but other people say that this version is missing this functioncv::Mat::updateContinuityFlag(). Then I modified the configuration file of cv_bridge and the problem was solved，as followed:

if(NOT "include;/usr/local/include;/usr/local/include/opencv2 " STREQUAL " ")
  set(cv_bridge_INCLUDE_DIRS "")
  set(_include_dirs "include;/usr/local/include;/usr/local/include/opencv2")

set(libraries "cv_bridge;/usr/local/lib/libopencv_world.so;/usr/local/lib/libopencv_world.so.3.3;/usr/local/lib/libopencv_world.so.3.3.1")