Rust is usable with an extremely minimal runtime that approximates having no runtime at all (with #[no_std]). There are a few intrinsics you have to define, bu

Rust is usable with an extremely minimal runtime that approximates having no runtime at all (with #[no_std]). There are a few intrinsics you have to define, but none of them involve memory allocation. It also has a core crate that does not expose anything that requires allocation.