Re: [PATCH] build_bug.h: add wrapper for _Static_assert

[Luc Van Oostenryck]

On Tue, Feb 05, 2019 at 10:53:31AM +0100, Rasmus Villemoes wrote:
> On 05/02/2019 00.12, Andrew Morton wrote:
> >>
> >> It would be (very) nice to actually use this macro in a few places so
> >> it gets its build testing while in -next.
> > 
> > ie, just about every BUILD_BUG_ON in mm/ could use this.  Let's switch
> > a few?
> > 
> 
> Perhaps, but some make sense where they are, e.g. when iterating over
> two arrays using one iterator variable, it's fine to assert they have
> the same size just above the loop. And, unfortunately, static_assert()
> is not quite a drop-in replacement for BUILD_BUG_ON even when the
> argument is an ICE due to -Wdeclaration-after-statement.

Yes, unfortunately.

-- Luc