Re: [committed] libstdc++: Suppress pedantic warnings about __int128

[Jonathan Wakely <jwakely.gcc@gmail.com>]

On Fri, 16 Jul 2021, 09:30 Jakub Jelinek via Libstdc++, <
libstdc++@gcc.gnu.org> wrote:

> On Fri, Jul 16, 2021 at 10:27:09AM +0200, Jakub Jelinek via Gcc-patches
> wrote:
> > On Fri, Jul 16, 2021 at 08:41:06AM +0100, Jonathan Wakely via
> Gcc-patches wrote:
> > > --- a/libstdc++-v3/include/bits/max_size_type.h
> > > +++ b/libstdc++-v3/include/bits/max_size_type.h
> > > @@ -417,7 +417,10 @@ namespace ranges
> > >  #endif
> > >
> > >  #if __SIZEOF_INT128__
> > > +#pragma GCC diagnostic push
> > > +#pragma GCC diagnostic ignored "-Wpedantic"
> > >        using __rep = unsigned __int128;
> > > +#pragma GCC diagnostic pop
> >
> > At least in simple cases like this, wouldn't
> >       using __rep = __extension__ unsigned __int128;
>
> __extension__ using __rep = unsigned __int128;
> actually (now tested).
>

Ah, thanks. I didn't find the right syntax, and I know __extension__
doesn't work in other cases, like quad float literals, so I assumed it
doesn't work here. I suppose the literals don't work because the warning
comes from the processor, which doesn't understand __extension__ (and also
ignores the diagnostic pragma).





>         Jakub
>
>