rustc_codegen_gcc

Gccrs is valuable for various reasons (bootstrapping, refining the spec, etc), but for the main purpose of "compiling to targets supported by gcc but not llvm", it's definitely not as promising as https://github.com/rust-lang/rustc_codegen_gcc. It's a rustc backend, at the same level as llvm or cranelift, it's much further along than gccrs (already available as a rustup component and can compile any rust code) and will not suffer from lagging behind rustc. But OP has wider ambitions: the real niche targets are supported by neither gcc nor llvm. A rust-to-c transpiler that can adapt to weird C compilers should have a very wide reach.

> There are many architectures that NetBSD supports where Rust is not available Are there many architectures that NetBSD supports where GCC is not available? The rustc_codegen_gcc project allows using the rustc compiler to target any architecture that GCC supports. I think it is pretty far along. https://github.com/rust-lang/rustc_codegen_gcc > getting a Rust compiler running in the first place is hard > bootstrap relies on a binary package > the compiler would also have to be part of the base system The gccrs project aims to make Rust a fully supported language in GCC. It is fully self-hosting and can be built from source. Once accepted, it will be one of the languages you get when you build GCC. https://github.com/Rust-GCC/gccrs When gccrs is ready, it will address all the above objections. Linux faces the same issues. Today, Rust is op