Re: [PATCH v2] compiler.h: give up __compiletime_assert_fallback()

From: Nick Desaulniers
Date: Tue Aug 28 2018 - 19:01:10 EST


On Mon, Aug 27, 2018 at 1:42 PM Daniel Santos <daniel.santos@xxxxxxxxx> wrote:
>
> Hello Nick,
>
> On 08/27/2018 03:09 PM, Nick Desaulniers wrote:
> >>> Let's give up __compiletime_assert_fallback(). This commit does not
> >>> change the current behavior since it just rips off the useless code.
> >> Clang is not the only target audience of
> >> __compiletime_assert_fallback(). Instead of ripping out something that
> >> may benefit builds with gcc 4.2 and earlier, why not override its
> > Note that with commit cafa0010cd51 ("Raise the minimum required gcc
> > version to 4.6") that gcc < 4.6 is irrelevant.
>
> Ah, I guess I'm not keeping up, that's wonderful news! Considering that
> I guess I would be OK with its removal, but I still think it would be
> better if a similar mechanism to break the Clang build could be found.

I'm consulting with our best language lawyers to see what combinations
of _Static_assert and __builtin_constant_p would do the trick.