There is a different project that grafts the existing rustc frontend to the gcc backend: rustc_codegen_gcc. The existence of both projects is currently very con

There is a different project that grafts the existing rustc frontend to the gcc backend: rustc_codegen_gcc. The existence of both projects is currently very contentious, as there are concerns about duplicated effort and possible fragmentation of the community. Some of the goals, like the ability to target more architectures, are equally supported by both projects, but for other goals (mostly more organizational and less technical, to my ears) they're pretty different.