M680x0-mono-repo VS rustc_codegen_gcc

This is based on the M68k backend for LLVM which is currently being upstreamed:

> https://github.com/M680x0/M680x0-mono-repo

and the m68k Rust backend I am working on:

> https://github.com/glaubitz/rust/commits/m68k-linux

Anyone interested in supporting LLVM for M68k can contribute to the Bountysource campaign:

> https://www.bountysource.com/issues/90829856-llvm-complete-t...

The Rust portability issue is the reason I have been pushing forward with the new M68k backend for LLVM which is due to be merged shortly:

> https://github.com/M680x0/M680x0-mono-repo

Patches for the M68k backend are discussed on reviews.llvm.org.

I have also started a Rust port for m68k already that depends on the LLVM backend work above:

> https://github.com/glaubitz/rust/tree/m68k-linux

For other architectures, the goal is to get gccrs moving forward and merged upstream:

> https://github.com/philberty/gccrs/

For anyone interested in helping, there are Bountysource campaigns I started to support both efforts:

> https://www.bountysource.com/issues/90829856-llvm-complete-t...

> https://www.bountysource.com/issues/86138921-rfe-add-a-front...

Up-to-date repo: https://github.com/M680x0/M680x0-mono-repo

It's true that if this project succeeds, that would be an outcome, but it's probably worth noting that you'd really only have to add support for the GCC backend to do that, and not reimplement the frontend as well (parsing, type checking, lifetime checking, etc.). There's an unrelated project working to do that: https://github.com/antoyo/rustc_codegen_gcc that would likely yield those same benefits for less effort.

platform support (may improve soon)

Here's the gcc backend for rustc here https://github.com/antoyo/rustc_codegen_gcc Since this just swaps the optimizer/codegen module and reuses all the other stuff from rustc it needs less work and can already compile many valid rust programs.

I'd like to use the rustc_codegen_gcc backend to compile some Rust programs, but I'm confused about how to install and use the patched libgccjit dependency. I've downloaded the fork provided but don't know where to go from there.

I was being a little sloppy and mixing together "actual embedded hardware" with "extensions for applications written in other languages" in my head. I think your point about LLVM is still accurate, though I hear peeps about different projects working on GCC support from time to time.

This doesn't have anything to do with using GCC to compile rust, but instead using rustc to compile Rust using the GCC backend. You can do that today by using the linked project, rustc_codegen_gcc, which is intended to be integrated into rustc at some point in the (hopefully near) future.

Rather than mrustc you should probably look at rustc_codegen_gcc which uses gcc as a backend to rustc (WIP) or GCC Rust which tries to implement a rust frontend for gcc (also WIP). I think rustc_codegen_gcc looks the most promising at the moment

Libgccjit AOT Codegen for Rustc\ (2 comments)