[pornel]

There's mrustc which compiles Rust to C. Rustc itself supports two back-ends now (LLVM and cranelift), so more should be possible if someone wanted to contribute and maintain them.

I don't think there's any ideological opposition to having more back-ends. It's just a huge amount of work, and is lacking volunteers, especially for niche platforms.

[CyberRabbi]

The amount of work doesn’t seem to be the limiting factor. Rewriting large amounts of C code into Rust is a lot of work too but that doesn’t stop Rust justice warriors from doing that.