As others have mentioned, Rust does indeed support cross-compilation (and has from day one). Sadly we still need to document it fully, though our spotty docs haven't stopped community members from getting Rust code running on FreeBSD and iOS and all sorts of ARM things. For the moment it may be enlightening to read the recently-implemented Flexible Target Specification RFC (https://github.com/rust-lang/rfcs/blob/master/text/0131-targ...), which you may have seen in action via Rust on the PSP (https://github.com/luqmana/rust-psp-hello).