CircleCI + native aarch64 linux buils work, how to document this?

[mr-c]

Here is how we did it, as inspired by @minrk (their setup is at zeromq/pyzmq#1743 )

https://github.com/common-workflow-language/schema_salad/pull/579/files#diff-78a8a19706dbd2a4425dd72bdab0502ed7a2cef16365ab7030a5a0588927bf47R15

[Czaki]

I think that you could see #1191 for inspiration.

Also, a note about this may be added here https://github.com/pypa/cibuildwheel/blob/main/docs/data/projects.yml#L179 for people looking for working examples.

[joerick]

Are the ARM runners available for free for open source? If so, we could just add a linux arm runner to the minimal config and add a ✅ to the readme table.

[mr-c]

Are the ARM runners available for free for open source?

Yep!

[minrk]

#1307 adds the example, readme ✅, and note