https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- There is always an emulated TLS support, but that is not what you ask for if you --enable-tls. As for mingw TLS support, you need to ask the mingw maintainers, I don't have access to that target, nor sufficient knowledge about it.