automatically detect GPU compute capability and set -arch correctly

[hjk41]

Currently we set -arch sm_35, which leads to "invalid device function" in older GPUs. There seems to be some effort in automatically detecting GPU compute capability and set it correctly: https://public.kitware.com/Bug/view.php?id=11767

Let's see if we can use it in our CMakeLists.txt

[futurely]

https://github.com/PointCloudLibrary/pcl/blob/master/cmake/pcl_find_cuda.cmake
https://github.com/Itseez/opencv/blob/master/cmake/OpenCVDetectCUDA.cmake

[hjk41]

Thanks for the info.

@minjie, @yutian, could you check if we can use this?

On Thu, Jul 23, 2015 at 2:19 PM, futurely notifications@github.com wrote:

https://github.com/PointCloudLibrary/pcl/blob/master/cmake/pcl_find_cuda.cmake
https://github.com/Itseez/opencv/blob/master/cmake/OpenCVDetectCUDA.cmake

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HONG Chuntao
System Research Group
Microsoft Research Asia