https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100164
--- Comment #6 from David Edelsohn <dje at gcc dot gnu.org> --- Created attachment 50644 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50644&action=edit pre-processed source for 17_intro/headers/c++2020/all_attributes.cc