Yes, as I mentioned it's fine if you're developing the C implementation. You can then choose what to do if any of them get used by a new revision of the C stand

Yes, as I mentioned it's fine if you're developing the C implementation. You can then choose what to do if any of them get used by a new revision of the C standard, your libc, or your compiler, since you'd be packaging your compiler, libc, and picking what C standard version you support. It's also trivial to change them, if you get a conflict, since it's a header-only library.