cmake with CUDA 10.0

[mansdell]

With CUDA 10.0 you need to upgrade cmake to the latest version 3.12.2 otherwise you get the following error:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
CUDA_cublas_device_LIBRARY (ADVANCED)

I followed these instructions to install the latest cmake version in the command line.

[fredRos]

Thanks for reporting. I will look into it. I would rather not require the latest version of cmake for everyone so perhaps we can add the appropriate FindCUDA.cmake file to make cuda 10 work with older versions of cmake

[mtazzari]

Thank you Fred, I agree it'd be best to require the minimum cmake version possible.

[fredRos]

If you use conda, a simpler way to get a current version of cmake is

conda install -c conda-forge cmake

[mtazzari]

Perhaps we can add this tip to the docs

[fredRos]

If we require 3.9, cmake natively supports cuda on all platforms and 3.9 is already quite old. But would that also be enough for cuda 10?
https://devblogs.nvidia.com/building-cuda-applications-cmake/