Re: Invalid compilation without -fno-strict-aliasing

[Daniel Jacobowitz <dan@debian.org>]

On Thu, Feb 27, 2003 at 12:00:46PM -0800, Linus Torvalds wrote:
> 
> On Thu, 27 Feb 2003, Daniel Jacobowitz wrote:
> > > 
> > > My personal opinion is (and was several years ago when this started
> > > coming up) that a cast (any cast) should do it. But I don't are _what_
> > > it is, as long as it is syntactically sane and isn't limited to special
> > > cases like unions.
> > 
> > Well, if that's all you're asking for, it's easy - I don't know if
> > you'll agree that the syntax is sane, but it's there.  From the GCC 3.3
> > manual:
> > 
> > `may_alias'
> 
> Halleluja. It still leaves us with all other compilers unaccounted for, 
> but yes, this will allow fixing the problem for us in the future.
> 
> Too bad the current gcc-3.3 is apparently not useful for the kernel for
> other reasons right now (ie the inlining issue which is being discussed on
> the gcc lists, and that annoying sign warning), but that may well be 
> resolved by the time it gets released.

We could work around both of these: disable the sign compare warning,
and use check_gcc to set a high number for -finline-limit...

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer