rustic compiler is an alternative Rust compilation toolchain that transpiles Rust's MIR into portable C source code, then compiles it with a standard C compiler (gcc or clang). This enables Rust on platforms where LLVM is unavailable but a C11-compliant compiler exists.

The core of the project is rustc_codegen_c, a rustc codegen backend that replaces the LLVM backend entirely. A Rust compiler built with this backend passes 99.2% of the official rustc UI test suite, confirming high-fidelity preservation of Rust semantics at the MIR level.

See the rustc_codegen_c repository for quick start instructions, supported platforms, and build guides.