> macOS emits x86-64 AT&T assembly

Seems like an obvious issue given that Apple makes no x86 machines, hasn't for three years, and plans to sunset Rosetta 2 in one year. The whole conceit of this "Freelang" project is that it has no "magic", and then incredibly just a bit further down the README states it has a stop-the-world mark/sweep garbage collector. That is quite magical, no? After reading the GitHub I confess I don't even understand what "magic" the authors are even complaining about. Honestly it seems like it's basically the same concept as Go, vibe-coded, with more pretense, worse syntax, and without the benefit of Google engineering.

You could implement the same functionality in Rust, using a custom target JSON without any libstd/libc. I've done so. It just requires that you accept some limitations and build your own abstractions around unsafe syscalls.