[Bug c/77817] -Wimplicit-fallthrough: cpp directive renders FALLTHRU comment ineffective

[marc.mutz at kdab dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77817

--- Comment #12 from Marc Mutz <marc.mutz at kdab dot com> ---
Is replacing a matching comment with __attribute__(fallthrough)) so complicated
as to make this a wontfix?