Rust front-end merged in GCC trunk
I have asked this question before, but why write an entirely new frontend, which is an enormous task if you want to reach a similar quality to rustc?  
rustc_codegen_gcc¹ adds gcc as a backend to rustc alongside llvm, miri and (wip) cranelift. As a result, it always works with the newest version of rust and is already nearly complete after less work.<p>¹<a href="https:&#x2F;&#x2F;github.com&#x2F;rust-lang&#x2F;rust&#x2F;tree&#x2F;master&#x2F;compiler&#x2F;rustc_codegen_gcc" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rust-lang&#x2F;rust&#x2F;tree&#x2F;master&#x2F;compiler&#x2F;rustc...</a>