[Bug c/116016] enhancement: add __builtin_set_counted_by(P->FAM, COUNT) or equivalent

[qinzhao at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116016

--- Comment #52 from qinzhao at gcc dot gnu.org ---
(In reply to Alejandro Colomar from comment #51)
> I would make it a compile-time error.  Why would we want to allow a non-FAM
> there?  (Unless the [[gnu::counted_by()]] attribute makes sense elsewhere.)
The "counted_by" attribute is planned to be extended to pointers too.