[WIP] Add support for C3 to bindgen

[radekm]

I thought bindgen support for C3 language could be useful, so I created this PR.

Unfortunately I haven't yet ported examples to C3 and have tested it only on macOS arm64.

Generated code can be browsed in my repository https://github.com/radekm/sokol-c3/

[floooh]

Looks like there's a python error in gen_c3.py:

https://github.com/floooh/sokol/actions/runs/11796284494/job/32872697466?pr=1148#step:9:9

[radekm]

Oh my, you're right, I somehow managed to use Python 3.12 feature which doesn't work in older Pythons (specifically using single quotes inside single-quoted f-string).

[radekm]

I have fixed CI (at least in my repo) by adding checkout of radekm/sokol-c3 into .github/workflows/gen_bindings.yml.

[floooh]

Oki, before merging C3 support, I'd like to get to a similar state as https://github.com/floooh/sokol-zig, e.g. a repository for the bindings, at least a handful examples ported, and an easy way to build the examples.

Should I create a repo under floooh/sokol-c3, and you could populate that?

[radekm]

Should I create a repo under floooh/sokol-c3, and you could populate that?

Sounds great! Yes, please create the repo.

[floooh]

Ok see: https://github.com/floooh/sokol-c3

I added you as collaborator so you can push directly (I think Github will send you an invite email). Later we should probably both work through PRs instead of committing directly to main.

I also added your name to the LICENSE file.

Once everything is setup I will add the code to the sokol CI pipeline to automatically update and push changes.

[floooh]

Hi @radekm what's the state of the PR, is it ready to merge or should I wait a bit more?

There's a curious CI error in the sokol-c3 repo:

https://github.com/floooh/sokol-c3/actions/runs/12096168226/job/33730154985

...any ideas what this is about? If it is some sort of Mac-specific C3 compiler error or regression we can out-comment the Mac build from the CI build matrix for now (I've seen similar stuff in the past in other languages when ARM Macs were new-ish).

[floooh]

This needs to be changed to floooh/sokol-c3.

And we also should have a build step test-c3 further down which depends on the gen-bindings job. The test job should basically be a copy of the CI job in the sokol-c3 repo. It's just there to prevent pushing to sokol-c3 if test compilation fails.

(...I can take care of the final deploy-job, since this involves creating an SSH key and some Github shenanigans to allow pushing to the sokol-c3 repo)

[floooh]

....also needs to be changed to floooh/sokol-c3

[radekm]

Hi, I think I’ll need a few more weeks. Before merging, I want to ensure that everything is in good shape and makes sense:

• First, I’d like to port more examples from other languages to C3.
  These examples help me test C3’s code generation in the shader compiler.

• Second, you’re right - there’s currently an issue where some examples don’t compile on macOS arm64.

  This is due to a bug in the latest version of the C3 compiler (type_int_unsigned_by_bitsize fails with illegal bitsize on arm64 c3lang/c3c#1649),
  which I discovered yesterday. It’s already fixed in the master branch, but I’d prefer to wait
  for the next official release of the compiler before proceeding.

• Third, I plan to ask some members of the C3 Discord community
  to review the code and possibly test it to ensure everything works as expected.

I’ll let you know as soon as it’s ready for merging. Thanks for your patience!

[floooh]

Oki doki, then I'll move to something else in the meantime. I'll keep an eye on the Github notifications to check if there's something to review or merge. If I don't react just explicitly 'at' me :)