@matze@javier_salcedo Didn't mean to be literal, since compilers are bootstrapped eventually (like rustc is). But since you're chiming in, rustc emits LLVM-IR and LLVM is written in C++ so that still counts!!! ;)
I'm aware that the Rust community is trying to replace as many non-Rust components as humanly possible, though. LLVM's linker lld is a somewhat recent work in progress I believe