cicd(gcc): add job with gcc 12 and nvcc 12.2.0

[romintomasetti]

Summary

• This PR adds a job using Cuda 12.2.0 with gcc 12.
• It also fixes a missing pthread.h include in the nvtx connector (only from gcc 12 onwards).

Details

In order to make the missing pthread.h problem appear, I needed to compile with gcc 12, which is not the default compiler in Ubuntu 22.04 images.

Therefore, the actions strategy matrix now has a compiler component, that can be set to default or anything else.

• default will install gcc and g++. For instance, in Ubuntu 22.04 images it is version 11.
• Otherwise, use an array like {c : my_c_compiler, cpp : my_cpp_compiler}. It will install these compilers instead.

Then just set CC or CXX to instruct CMake which compilers to use.

Note that for the Cuda preset case, we also need to set NVCC_WRAPPER_DEFAULT_COMPILER because it will use Kokkos's nvcc_wrapper that by default uses g++ for the c++ compiler.

[romintomasetti]

Hi @masterleinad @vlkale ! Would you have a moment to review this one? Thanks!

[vlkale]

LGTM. Thanks!

[masterleinad]

Why do you want to test with both cuda-12.1.0 and cuda-12.2.0 and not some older version (e.g., the oldest one Kokkos supports)?

[romintomasetti]

Why do you want to test with both cuda-12.1.0 and cuda-12.2.0 and not some older version (e.g., the oldest one Kokkos supports)?

Because that's our use case. We strive to be up-to-date with latest versions. In our experience, this helps detecting bugs.

If you want, I can make another PR that changes cuda-12.1.0 to an older version 😉

[crtrott]

Yeah lets change the 12.1 to an old version. I am ok with having two CUDA builds in here: one the newest and one if possible the oldest Kokkos supports (right now 11.0)