Fix #4

[RMeli]

Should fix issue #4 (probably there is a more elegant way of doing it...).

[dkoes]

It would be a bit cleaner to not duplicate the code and guard the addition of new architectures under the version check.

[RMeli]

I agree. Would something like the following (untested) be better?

list(APPEND GPU_ARCHS 35 50 60 70)
if (NOT ("${CUDA_VERSION}" VERSION_LESS "10.0"))
    list(APPEND GPU_ARCHS 75)
endif()

foreach(arch ${GPU_ARCHS})
    set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -gencode arch=compute_${arch},code=sm_${arch}")
endforeach()

set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -Werror cross-execution-space-call,deprecated-declarations")

[dkoes]

That would work, but I already pushed a different code structure.