rusticl: add README file

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15439>
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Karol Herbst 2022-09-10 15:32:45 +02:00 committed by Marge Bot
parent db34a7ca30
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# Rusticl
The easiest way to build Rusticl is by either installing `rustc`, `rustfmt` and `bindgen` from your distribution or to simply use rustup. Just make sure that the `rustfmt` and `bindgen` components are installed. Then simply add `-Dgallium-rusticl=true -Dllvm=enabled -Drust_std=2021` to your build options.
Most of the code related to Mesa's C code lives inside `/mesa`, with the occasional use of enums, structs or constants through the code base.
If you need help ping `karolherbst` either in `#dri-devel` or `#rusticl` on OFTC.
Also, make sure that before submitting code to verify the formatting is in order. That can easily be done via `git ls-files */{lib,app}.rs | xargs rustfmt`
When submitting Merge Requests or filing bugs related to Rusticl, make sure to add the `Rusticl` label so people subscribed to that Label get pinged.
## Known issues
One issue you might come across is, that the Rust edition meson sets is not right. This is a known [meson bug](https://github.com/mesonbuild/meson/issues/10664) and in order to fix it, simply run `meson configure $your_build_dir -Drust_std=2021`