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!