The compiler does not need to be compiled for the cross-target to just run binaries, just the standard library like C; but, once they exist, running the compile

The compiler does not need to be compiled for the cross-target to just run binaries, just the standard library like C; but, once they exist, running the compiler directly with `rustc --target=...` and using the dependency/build manager cargo `cargo build --target=...` both work fine. Of course, it is harder to obtain cross-compiled versions of the Rust standard library at the moment, so what you say is likely true.