> That's painful. It's one big point which Nim [1] does better. It compiles to C and bootstraps from C. That makes porting to other platforms much easier.

Unless you are talking about an architecture which doesn't have llvm backend, it takes the same effort as nim to port rust and haskell.

> Did they write the first compilers with Assembler?

Rust was written in Ocaml first, bootstrapping from C need decent amount of effort. I don't know the origins of haskell.