On Wed, Jul 1, 2020 at 12:19 PM Will Deacon <w...@kernel.org> wrote:
> On Tue, Jun 30, 2020 at 09:25:03PM +0200, Arnd Bergmann wrote:
> > On Tue, Jun 30, 2020 at 7:39 PM Will Deacon <w...@kernel.org> wrote:
> > Once we make gcc-4.9 the minimum version,
> > this could be further improved to
> >
> > __auto_type __x = &(x);
>
> Is anybody working on moving to 4.9? I've seen the mails from Linus
> championing it, but I thought there was a RHEL in support that people
> might care about?
I don't think there was a serious discussion about it so far, and
we only just moved to gcc-4.8.
I think moving to gnu11 (gcc-4.9 or clang) instead of gnu99 has other
benefits as well, so we may well want to do it anyway when something
else comes up.
For __auto_type(), we could do it like
#if (clang or gcc-4.9+)
#define auto_typeof(x) __auto_type
#else
#define auto_typeof(x) typeof(x)
#endif
which could be used in a lot of macros.
Arnd
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