The OCaml compiler is not used anymore for years. As you said, the Rust build system now downloads a precompiled snapshot of the new implementation, which is written in Rust. Unfortunately, you won't be able to compile it yourself.if you don't have Rust already setup on your machine.<br>
For C++, I believe it's used to compile the modified LLVM Rustc uses. Others may confirm this.<br>
Envoyé de mon téléphone Android avec K-9 Mail. Excusez la brièveté.