Building Cuda files with specific architecture will cause hanging

[jinz2014]

I am not sure if you encountered the issue before. After building the files whose suffix end with (.cu) with the nvcc flag "-arch=sm_70", the program will hang after stage 1. It will also generate many temporary files in the current directory while hanging.
Without the flag, the program will run to completion.

I also notice that in the CMakeFile, the CUDA architectures/compute capacity are not specified.

Thanks