https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87030
--- Comment #5 from Jack Howarth <howarth.at.gcc at gmail dot com> --- (In reply to Iain Sandoe from comment #3) > > 3. I don't see why GCC should be subject to the vendor's support policy. As > far as I am concerned, with the right SDK / sysroot available, there's no > reason why a compiler *hosted* on x86-64-Darwin18 shouldn't be able to build > code for i686-darwin10 *target*. That makes the assumption that the cctools in some future macOS release won't obsolete out the code for support i386 assembly and linkage. I wouldn't be surprised if that actually happened should Apple start making arm64-apple-darwin a thing.