[Patch] Fix build warnings for GAS on mips-linux-gnu

[Alan Modra]

On Mon, Jul 09, 2012 at 07:33:47PM +0100, Maciej W. Rozycki wrote:
> On Mon, 18 Jun 2012, Alan Modra wrote:
> 
> > > P.S.   As an aside, is it intentional that the fall-back specifications are not proper prototypes? 
> > 
> > Yes.  It saves trouble with "const char *" vs. "char *", "unsigned
> > long" vs. "unsigned int" and the like differences when we provide a
> > declaration that doesn't match some system header declaration.
> 
>  Hmm, two issues here:
> 
> 1. Does it really matter given that the actual purpose of these fallback 
>    declarations is to address the case where there are no respective 
>    system-header declarations or prototypes in the first place (assuming 
>    of course that e.g. sizeof (unsigned long) equals sizeof (unsigned 
>    int) where applicable)?

I think the failure mode was in cases where the HAVE_* macros were not
defined for some reason even though the system headers have a
declaration.

> 2. How does it play with -Werror that we use? -- these "function
>    declaration isn't a prototype" warnings will be turned into errors 
>    defeating the purpose of these fallback declarations.

Yes, --disable-werror will need to be used.

-- 
Alan Modra
Australia Development Lab, IBM