[Bug c/119877] [12/13/14/15/16 Regression] Honor __attribute__((unused)) and don't issue a warning -Wunused-function

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119877

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is by design IIRC.