error installing vision_opencv using catkin_make with OpenCV 4.1.0

[SalilVishnuKapur]

Issue : I have compiled opencv 4.1.0 with cuda support. So want to build the ros dependent packages with custom opencv. The command after initializing catkin_init_workspace is as follows. Any kind of help will be deeply appreciated Command : catkin_make -DCMAKE_BUILD_TYPE=Release -DOpenCV_DIR=/opt/include/opencv4/opencv2 -DPYTHON_EXECUTABLE=/usr/bin/python3

My fixes till yet : I fixed the initial issues by editing the cmake file to have opencv version 4.1.0 and also /home/spiri/ros_opencv_dependables/src/orb_slam_2_ros/orb_slam2/include/ORBextractor.h to have #include <opencv2/opencv.hpp> instead of #include <opencv/cv.h>

My system config : Ubuntu 18.04 Opencv 4.1.0 gcc 7.4.0 numpy 1.16.5 catkin

Error Log : In file included from /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:35:0: /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module.hpp: In function ‘int do_numpy_import()’: /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module.hpp:39:5: warning: converting to non-pointer type ‘int’ from NULL [-Wconversion-null] import_array( ); ^~~~~~~~~~~~ /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp: At global scope: /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:151:16: error: cannot declare variable ‘g_numpyAllocator’ to be of abstract type ‘NumpyAllocator’ NumpyAllocator g_numpyAllocator; ^~~~~~~~~~~~~~~~ /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:98:7: note: because the following virtual functions are pure within ‘NumpyAllocator’: class NumpyAllocator : public cv::MatAllocator ^~~~~~~~~~~~~~ In file included from /opt/include/opencv4/opencv2/core.hpp:59:0, from /opt/include/opencv4/opencv2/core/core.hpp:48, from /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/include/cv_bridge/cv_bridge.h:43, from /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module.hpp:22, from /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:35: /opt/include/opencv4/opencv2/core/mat.hpp:472:23: note: virtual cv::UMatData* cv::MatAllocator::allocate(int, const int*, int, void*, size_t*, cv::AccessFlag, cv::UMatUsageFlags) const virtual UMatData* allocate(int dims, const int* sizes, int type, ^~~~~~~~ /opt/include/opencv4/opencv2/core/mat.hpp:474:18: note: virtual bool cv::MatAllocator::allocate(cv::UMatData*, cv::AccessFlag, cv::UMatUsageFlags) const virtual bool allocate(UMatData* data, AccessFlag accessflags, UMatUsageFlags usageFlags) const = 0; ^~~~~~~~ /opt/include/opencv4/opencv2/core/mat.hpp:475:18: note: virtual void cv::MatAllocator::deallocate(cv::UMatData*) const virtual void deallocate(UMatData* data) const = 0; ^~~~~~~~~~ /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp: In function ‘int convert_to_CvMat2(const PyObject*, cv::Mat&)’: /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:233:11: error: ‘class cv::Mat’ has no member named ‘refcount’ m.refcount = refcountFromPyObject(o); ^~~~~~~~ /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp: In function ‘PyObject* pyopencv_from(const cv::Mat&)’: /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:254:12: error: ‘class cv::Mat’ has no member named ‘refcount’ if(!p->refcount || p->allocator != &g_numpyAllocator) ^~~~~~~~ /home/spiri/ros_opencv_dependables/src/vision_opencv/cv_bridge/src/module_opencv2.cpp:261:36: error: ‘class cv::Mat’ has no member named ‘refcount’ return pyObjectFromRefcount(p->refcount);

[acxz]

See: Issue #272 and PRs #259 #288

Until support for OpenCV 4 is merged into this package, I would recommend using one of the branches in the submitted PRs.

[ErictheSam]

Ran into the same problem, thanks for your solution!