[libcxx-commits] [libcxx] [runtimes] Add a qemu-system executor script (PR #68643)

[Alexander Richardson via libcxx-commits]

arichardson wrote:

> I'd prefer to land https://reviews.llvm.org/D154246 and https://reviews.llvm.org/D155521 as-is since they're well tested. I'm not sure whether this will work in all circumstances since it doesn't support the full interface of `run.py`, and this change can't be exercised by CI.

I've run it locally with picolibc so it definitely works, the codesigner interface of run.py is only needed if you use the script for Apple platforms. 

Would you be okay with landing this change, then you could rebase the phabricator reviews on top of this and use q the python script instead of qemu.sh in those reviews? They need to be rebased anyway to get a clean ci run so hopefully this doesn't add too much work?

https://github.com/llvm/llvm-project/pull/68643