cmake configuration and kokkos versions

[jjaraalm]

Cmake config needs to be updated or tested over different versions

cmake_minimum_required(VERSION 3.9)
cmake_policy(SET CMP0074 NEW)

Policy CMP0074 doesn't exist between 3.9-3.12 and raises an error.

Using -DBUILD_INTERNAL_KOKKOS=ON with a recently updated Kokkos submodule and nvcc 10.2 raises an error that C++14 is required. I had to change to

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

to make it work.

[jjaraalm]

For the second, I accidentally bumped Kokkos to 3.3.0 and this might be related. It also introduced new half-precision issues related to kokkos/kokkos#3561. I'm reverting back to 3.1.0.

For reference, my toolchain is

• nvcc 10.2
• gcc 7.3.1
• openmpi 3.1

[junghans]

Heads up kokkos will require cmake-3.17 pretty soon, you might want to move away from travis to github Actions.
see
https://github.com/kokkos/kokkos/blob/develop/.github/workflows/continuous-integration-workflow.yml
the key is to use the ghcr.io/kokkos/ci-containers/${{ matrix.distro }} containers, which has also the packages to build kokkos.

[rfbird]

Interesting, thanks for that @junghans. I was planning to move us up to 3.3.0 soon and figured a bunch of that out locally yesterday. Seems like a good time to change the CI too

[jjaraalm]

Thanks for the info. It's actually my production system which uses cmake 3.11 by default; just had to change modules. I guess my point was just to make sure minimum version requirements and standards are consistent.

[rfbird]

Yea I think lets just go to the future early, and move to 3.17 ahead of Kokkos