https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85921
--- Comment #16 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- On Fri, 25 May 2018, msebor at gcc dot gnu.org wrote: > Beyond that, #defining macros that match known attributes to something else > seems like asking for trouble. It even came up at the last WG14 meeting in > the > context of the newly proposed C [[attributes]]: is something like > > #define deprecated "foobar" > #include <stdio.h> > > a valid C (or C++) program? (Should it be?) Unless you change 7.1.2#4 "The program shall not have any macros with names lexically identical to keywords currently defined prior to the inclusion of the header or when any macro defined in the header is expanded.", it is. It's possible that defining any attributes in the standard should mean also saying standard attributes alongside keywords there.
