Clarification on which version of OpenCV

[joshuajnoble]

I've been reading through this thread opencv/opencv#10963 and seeing lots of discussion #500 and #414 but I can't compile with OpenCV 3.4.0, I get the errors:

1>------ Build started: Project: darknet, Configuration: Debug x64 ------ 1>http_stream.cpp 1>c:\users\winbase\code\opencv\build\include\opencv2\flann\matrix.h(70): warning C4003: not enough actual parameters for macro 'free' 1>c:\users\winbase\code\opencv\build\include\opencv2\flann\matrix.h(70): error C2059: syntax error: ',' 1>c:\users\winbase\code\opencv\build\include\opencv2\flann\matrix.h(87): note: see reference to class template instantiation 'cvflann::Matrix<T>' being compiled 1>c:\users\winbase\code\opencv\build\include\opencv2\core\cuda.hpp(106): error C2059: syntax error: 'constant'

from matrix.h

/** * Convenience function for deallocating the storage data. */ CV_DEPRECATED void free() { fprintf(stderr, "The cvflann::Matrix<T>::free() method is deprecated " "and it does not do any memory deallocation any more. You are" "responsible for deallocating the matrix memory (by doing" "'delete[] matrix.data' for example)"); }

Is there any guidance on which version of OpenCV 3 is compatible with Darknet? I can compile with 2.4.13 but in running darknet detector train it always crashes on try to allocate workspace. Without OpenCV I can train without problems. I'm not sure how to get the OpenCV compatibility. I'm using Windows 10, Visual Studio 2017, CUDA 9.2, and the following flags:

OPENCV;CUDNN;_CRTDBG_MAP_ALLOC;_MBCS;_TIMESPEC_DEFINED;_CRT_SECURE_NO_WARNINGS;_CRT_RAND_S;GPU;WIN32;NDEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)

[AlexeyAB]

Try to use OpenCV 3.3.0 https://github.com/opencv/opencv/archive/3.3.0.zip

[joshuajnoble]

OpenCV 3.3.0 errors out with:

1>c:\users\winbase\code\opencv\build\include\opencv2\core\cvdef.h(58): error C2061: syntax error: identifier 'cv' (compiling source file ..\..\src\voxel.c)

The C++ is still getting brought into the compile somehow, not sure how other folks are getting around this.

[AshleyRoth]

@AlexeyAB Hello! Can you explain me please. For what it answers here // get_region_boxes (l, 1, 1, thresh, probs, boxes, 0, 0); and why is now commented on? Not used or replaced?

[vinjn]

I am using OpenCV 3.4.0 for months :)