Add realpath Prototype

[Corinna Vinschen]

On Nov 20 08:35, Joel Sherrill wrote:
> On 11/20/2013 8:26 AM, Corinna Vinschen wrote:
> > On Nov 20 07:38, Joel Sherrill wrote:
> >> On 11/20/2013 3:46 AM, Corinna Vinschen wrote:
> >>> On Nov 19 12:42, Corinna Vinschen wrote:
> >>>> On Nov 18 13:32, Joel Sherrill wrote:
> >>>>> On 11/18/2013 12:33 PM, Yaakov (Cygwin/X) wrote:
> >>>>>> On 2013-11-18 12:24, Joel Sherrill wrote:
> >>>>>>> I added the realpath() prototype more or less where
> >>>>>>> glibc has it in stdlib.h.
> >>>>>>> 
> >>>>>>> Also added restrict to Linux implementation.
> >>>>>>> 
> >>>>>>> Does this look ok to commit?
> >>>>>> 
> >>>>>> Your patch includes a duplicate declaration of qsort().
> >>>>> 
> >>>>> Fixed. Stupid cut and paste.
> >>>>> 
> >>>>>> Also, Cygwin provides its own prototype of realpath in
> >>>>>> its own headers, so either that needs to be removed, or
> >>>>>> this prototype placed in a !__CYGWIN__ block; I'll let
> >>>>>> Corinna decide which she prefers.
> >>>>> 
> >>>>> Since this wasn't in newlib, I didn't know about it. I have
> >>>>>  been trusting grep. :)
> >>>>> 
> >>>>> Whatever Corinna wants to do, I am ok with.
> >>>> 
> >>>> Just apply your patch.  I'll remove the Cygwin definition 
> >>>> afterwards.
> >>> 
> >>> FYI, I moved the readline declaration into the following
> >>> `#ifndef __STRICT_ANSI__' block, analogue to the old
> >>> Cygwin-only declaration.
> >> . Thanks. The guards are tricky. glibc has
> >> 
> >> #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
> >> 
> >> http://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
> >>
> >> 
> marks it as XSI with no explicit macros that I am spotting.
> >> 
> >> Is that close enough?
> > 
> > I don't understand the question.  BSD and XOPEN don't correspond
> > to strict ANSI.
> 
> I was just pointing out that glibc has BSD and XOPEN as guards.
> Is that equivalent?

It's not exactly equivalent, but __USE_BSD and __USE_XOPEN_EXTENDED
are probably not set if strict ANSI is requested.


Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat
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