warning when a function's address is tested?

[Falk Hueffner]

Jeff Sturm <jsturm@one-point.com> writes:

> On Sun, 12 Oct 2003, Andrew Morton wrote:
> > -	if (current_is_kswapd)
> > +	if (current_is_kswapd())
> >
> > It was there for a year.  It is a fairly easy mistake to make, and it would
> > be nice if the compiler could generate a warning.  I don't think there are
> > likely to be legitimate uses?
> 
> One legitimate use is to test for undefined weak symbols.

But gcc knows that from __attribute__((weak)) and can suppress the
warning in this case (like the C++ frontend does).

-- 
	Falk