[Linux] What does it need to have IBM Power (ppc64le) support?

[mgiessing]

Summary

Hello!

As people already indicated it is not difficult to build psutil for other CPU architectures like aarch64 or ppc64le, however many other projects rely on psutil and therefore I'd like to understand what exactly is needed from your side to support these architectures?

I understand your concerns you've shared in #2103 that there'll be too much additional effort from your side, but would it be an option to introduce platform support based on different Tiers, similar as done in the Qiskit Package (https://qiskit.org/documentation/getting_started.html#platform-support)?

There the basic distinction is:

• T1: Wheels are built, tested & uploaded to pypi, fully tested upstream during development and have all dependencies available, ensuring easy installation.
• T2: Wheels are built, tested & uploaded to pypi, not tested upstream but binaries are available for easy installation.
• T3: Wheels are built & uploaded to pypi, but not tested and it is not ensured to install without further effort.

Furhtermore, would it be helpful if we (IBM) support you in maintaining and reviewing issues & PRs related (but not limited) to e.g. ppc64le wheels?

I'd appreciate your view on that!