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From: "Suhaib M. Siddiqi" <ssiddiqi AT ipass DOT net>
To: "Cygwin Mailing List" <cygwin AT sourceware DOT cygnus DOT com>
Subject: RE: sys_errlist
Date: Wed, 3 Nov 1999 20:37:51 -0500
Message-ID: <LOBBLPGIHMIEGBEAFDMCGELDCBAA.ssiddiqi@ipass.net>
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M$ is abummer.  They love to invent their own stuff
intentionally to make life more complicated for developers.

The POSIX subsytem in MSVC simply sucks

Suhaib

> -----Original Message-----
> From: cygwin-owner AT sourceware DOT cygnus DOT com
> [mailto:cygwin-owner AT sourceware DOT cygnus DOT com]On Behalf Of J. J. Farrell
> Sent: Wednesday, November 03, 1999 7:18 PM
> To: Cygwin Mailing List
> Subject: Re: sys_errlist
> 
> 
> > From: "J. J. Farrell" <jjf AT bcs DOT org DOT uk>
> > 
> > Since the non-underscore versions are required to be present in
> > the interface definition which many modern UNIXes are based on,
> > I'd say that cygwin should expose them, but no-cygwin shouldn't.
> > Is it possible to expose them in a way which makes user declaration
> > work, as mandated by the SVID, rather than requiring the <errno.h>
> > inclusion? Both should expose the underscore versions since there's
> > no harm doing so.
> 
> To add another confusing data point, I've just noticed that Microsoft
> Visual C 6.0 declares _sys_errlist and _sys_nerr in <stdlib.h> rather
> that <errno.h>; and if the compiler is not running in "strict ANSI"
> mode and doesn't have _POSIX_ defined, it also declares sys_errlist
> and sys_nerr in <stdlib.h>.
> 
> I don't know if the optimum solution can be achieved, but it would
> look like:
> 
> - when in maximum UNIX compatibility mode, just declaring
> 
>     extern char *sys_errlist[]; extern int sys_nerr;
> 
>   in the code should work. Failing this, removing these declarations
>   and including <errno.h> seems a reasonable option since such code
>   will almost certainly be including <errno.h> already. The versions
>   with leading underscores should probably be made available in the
>   same way.
> 
> - when in  maximum VC++ compatibility mode, the leading underscore
>   versions should be made available by including <stdlib.h>; if not
>   in strict Standard C mode, the non-underscore versions should be
>   available in the same way.
> 
> If it isn't possible to support declarations in the code, the simplest
> solution is probably that both <errno.h> and <stdlib.h> should declare
> the leading underscore names, and if not in strict Standard C mode
> they should #define the no-underscore names to the underscore ones.
> 
> 
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