Trying to install "aiohttp" with pip I get a compile error installing "yarl".  I get the same error when I install just that module.  But it installs fine on 3.10.  This is on an Apple M1 (ARM64) machine.

It looks like you're missing dependencies required to compile yarl. Since this isn't a bug with Python, I'm going to close this.

I suggest you ask the yarl community for help. Their home page is https://github.com/aio-libs/yarl/

Good luck!

The only dependency mentioned by the yarl documentation is multidict and installing that makes no difference.  I see I can tell yarl to build a pure-python version to avoid compiling stuff.  If I do that it installs.  But what I actually wanted to do is install aiohttp, and that step fails with the exact same error message.

Given that it works in 3.10 but fails in 3.11a4, it does seem there is something about the new code that is involved here.

Ah. longintrepr.h is an internal Python file, not meant for external consumption. This file moved in Python 3.11. So this is still a yarl issue: they'll need to adjust how they read that file. But my recommendation is that they find another way to do what they want without including it.

See https://github.com/python/cpython/blob/main/Include/README.rst. Files in the cpython directory (which longintrepr.h is) are a CPython implementation detail, and can change or move at any time.

Thanks, I'll pass the word to the yarl and aiohttp team (both have this issue).