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Date: Wed, 24 Sep 2014 10:17:04 +0200
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Subject: Re: [geda-user] Banging my head against the guile-for-windows wall
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On Wed, Sep 24, 2014 at 02:35:52AM -0400, DJ Delorie wrote:
> 
> > > This is ugly but if void * and int are the same size it is harmless.
> 
> I've seen way too many platforms where pointers and "int" are
> different sizes, to give this one a pass...
> 
> Worse, on the msp430, large-model pointers are neither int-sized nor
> long-sized.  Not that gEDA will ever run on an msp430 ;-)
> 
> > I consider this one a spurious warning, it may probably be silenced by inserting
> > an useless and ugly cast, but I really wonder on which drugs the compiler
> > writers were when they decided to add it. You should always be able to pass
> > a non-const argument to a const parameter.
> 
> You're confusing a const argument with an argument which is a *pointer
> to* a const value.  It's the latter that gcc is warning about, because
> the pointed-to types are different.

No, I don't confuse them, I just disagree with the warning.
> 
> One could still argue that gcc should ignore pointer-to-nonconst
> passed as pointer-to-const (and perhaps the trunk gcc does) but
> otherwise the logic is sane - the pointers point to different types.

Not different enough to elicit a warning IMHO.

> It's like passing "struct foo *" when the function wants "struct bar *".

That's where I disagree. Having to add a casts to eliminate this warning
makes the source code uglier without any real benefit.