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Re: [Patch] Fix build warnings for GAS on mips-linux-gnu
- From: "Maciej W. Rozycki" <macro at codesourcery dot com>
- To: Alan Modra <amodra at gmail dot com>
- Cc: Iain Sandoe <iain at codesourcery dot com>, <binutils at sourceware dot org>
- Date: Mon, 9 Jul 2012 19:33:47 +0100
- Subject: Re: [Patch] Fix build warnings for GAS on mips-linux-gnu
- References: <6C17D860-E7DE-4E59-A4A9-E0F84CE39D0E@codesourcery.com> <20120618042218.GB28533@bubble.grove.modra.org>
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)?
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.
Maciej