Found your mailing list today looking for macOS support for TCC. I have some good news, in the form of a patch that enables '-run' mode and a patch consisting of clang warning fixes. This should allow for further work to be done, as in adding proper Mach-O support.
Don't know the procedures you folks have for doing code reviews, but I've my own branch (https://github.com/andreiw/tinycc
) which I just forked from the mob one. At the very least, it provides a good way of looking at the changes.
Hopefully this will be useful for someone. If you guys think this is interesting to merge, I can definitely address any concerns you might have.