Re: gcc 3.2 warnings ?

[Helge Hess]

Nicola Pero wrote:
> > > since I upgraded to gcc 3.2 I have to compilation problems:
> > >
> > > a) warning: pasting "[" and "[" does not give a valid preprocessing token
> > > - this is some macro, I think I get this with NSAssert and THROW
> Just removing the ### should work - I did it yesterday and
> libFoundation-090 compiled fine with 3.3.

What exactly do you mean, I grepped for ### but didn't found anything. 
Do you say I should replace:
  #define NSAssert1(args...)    NSAssert(##args)
with
  #define NSAssert1(args...)    NSAssert(args)
?

> > > b) casting Objective-C protocols doesn't seem to work. Eg if I do
> > >   [(id)stream doIt];
> > > the compiler complains that the NGStream protocol doesn't support doIt 
> > > (which is correct, but I did cast !)
>
> This is definitely a bug in the compiler - I think the C cast code has
> been modified in the compiler without taking into account ObjC.  I can see
> that the compiler is not doing the cast; at a quick glance at the code, I
> think it's probably trying to optimize away unneeded casts, and because
> 'id' and 'id<NGStream>' look the same to C (they are just the same
> pointer, if you forget about the protocol attached to the second one), the
> cast is optimized away.
>
> I'll try to have it fixed before GCC 3.3 is out.

Excellent. I think this bug is also in MacOSX gcc 3.1.

Greetings
  Helge