Is it possible either to build current version of libopenraw without Rust or backport support for specific cameras into pre-Rust version?

I have seen somewhere that Rust is needed only to support specific Canon RAW format. Canon is out of my interest altogether. I primarily need PEF with the most recent cameras and Adobe DNG. Is there any way to bypass a need for Rust? Ideally build the current version, of course, just without Rust-requiring part.