I'm not sure on the specifics of what you mean, but zig comes bundled with and wraps gcc. `zig cc` command directly forwards to gcc (try `zig cc --version`) and zig's build system can be used to build C programs.

Zig currently is able to target quite a bit. There's a good chance you could open an issue and it would get added, or find an existing issue and see where it is on the roadmap.