On Fri, Aug 19, 2022 at 6:13 AM Jonas Rahlf via Gcc <gcc@gcc.gnu.org> wrote: > > As a firmware developer I would appreciate a warning option about padding > bytes, but only for such cases where you can reduce the number of padding > bytes by rearranging the fields. > > The current -Wpadded warns about all padding bytes, which is annoying. > > The concept sounds simple: you rearrange all fields from large to small and > check if the size changed. > > The goal is to more easily optimize RAM/flash in space constrained systems. > > Jonas
That sounds like bug 52981: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52981
