Re: [Intel-wired-lan] [PATCH 000/141] Fix fall-through warnings for Clang

Finn Thain
2020-11-24T23:53:41Z

On Wed, 25 Nov 2020, Miguel Ojeda wrote:

>
> The C standard has nothing to do with this. We use compiler extensions
> of several kinds, for many years. Even discounting those extensions, the
> kernel is not even conforming to C due to e.g. strict aliasing. I am not
> sure what you are trying to argue here.
>

I'm saying that supporting the official language spec makes more sense
than attempting to support a multitude of divergent interpretations of the
spec (i.e. gcc, clang, coverity etc.)

I'm also saying that the reason why we use -std=gnu89 is that existing
code was written in that language, not in ad hoc languages comprised of
collections of extensions that change with every release.

> But, since you insist: yes, the `fallthrough` attribute is in the
> current C2x draft.
>

Thank you for checking. I found a free version that's only 6 weeks old:

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2583.pdf

It will be interesting to see whether 6.7.11.5 changes once the various
implementations reach agreement.