Tested manually on Windows with CUDA 12.6.

cc @cudawarped

Cannot test Cuda 10.2 + MSVS, because Microsoft does not allow to download old Visual Studio versions.

@asmorkalov Working on Windows with CUDA 12.8.

Cannot test Cuda 10.2 + MSVS, because Microsoft does not allow to download old Visual Studio versions.

Installing CUDA 10.2 now to see if I can build it with my version of VS 2019.

@asmorkalov Building with CUDA 10.2 and VS 2019 I get the following warnings but everything builds correctly

CUSTOMBUILD : nvcc warning : The -std=c++11 flag is not supported with the configured host compiler. Flag will be ignored. [D:\build\opencv\cuda_10_2\modules\cudaarithm\opencv_cudaarithm.vcxproj]

This is probably the reason for the original condition in the CMake file.

@cudawarped I added OS check for CUDA pre 11.0.

@asmorkalov That fixes the issue for everything apart from test cudev which by the looks of it would always have generated this warning

  Building NVCC (Device) object modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/Debug/opencv_test_cudev_generated_test_arithm_func.cu.obj
  test_arithm_func.cu
CUSTOMBUILD : nvcc warning : The -std=c++11 flag is not supported with the configured host compiler. Flag will be ignored. [D:\build\opencv\cuda_10_2\modules\cudev\test\opencv_test_cudev.vcxproj]
CUSTOMBUILD : nvcc warning : The -std=c++11 flag is not supported with the configured host compiler. Flag will be ignored. [D:\build\opencv\cuda_10_2\modules\cudev\test\opencv_test_cudev.vcxproj]

That said with the amount of

warning : field of class type without a DLL interface used in a class with a DLL interface

warnings generated by VS 2019 with CUDA 10.2 I am not sure if this is an issue worth fixing.

@cudawarped Thanks a lot for the investigation. I merge the patch then and return back to cudev later.