cmake cuda arch issues

[leezu]

@cjolivier01 there still seem to be some issues with cuda arch and cmake.

Ref: #6204 #6799

In particular I experience an issue similar to #6204: With cmake: Check failed: err == cudaSuccess (7 vs. 0) Name: MapRedKeepLowestKernel ErrStr:too many resources requested for launch whereas the ordinary Makefile build works. In both cases I target -gencode arch=compute_61,code=sm_61 for GTX 1080.

[cjolivier01]

When the CMake config occurs, you see that it is selecting sm61 in the output?
ie my work box says:
-- CUDA_ARCH_LIST: Auto
-- Autodetected CUDA architecture(s): 5.0
-- cuda arch bin: 50
-- cuda arch ptx:

[vdantu]

@sandeep-krishnamurthy: Label "CUDA", "Question"
@leezu : If you are still seeing this issue, could you give further information to @cjolivier01?

[deuscovrigus]

Bug still present using the cmake build on a TITAN V card. the architectures that the binary targetted is sm_70. The makefile build works but all known architectures are targetted.