crustc project publishes a functional Rust compiler translated into 46 million lines of C

A GitHub project called crustc demonstrates rustc 1.98.0-nightly translated into 46 million lines of C that can be built with GCC and make. The resulting compiler can report its version and compile Rust components such as core, alloc, and std, while relying on the matching LLVM library.

The project is a showcase for cilly, a Rust-to-C compiler backend aimed at supporting arbitrary targets. If practical beyond demos, this approach could broaden Rust’s portability to environments where C toolchains are mature but native Rust support is limited.