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Date:	Thu, 06 Feb 2014 11:19:49 +0100
From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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To:	cygwin AT cygwin DOT com
Subject:	Re: cygwin-1.7.28 getpwent header declaration changes ?
References:	<52F339CA DOT 5070305 AT gmail DOT com> <20140206090117 DOT GD2821 AT calimero DOT vinschen DOT de>
In-Reply-To:	<20140206090117.GD2821@calimero.vinschen.de>
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On 06/02/2014 10:01, Corinna Vinschen wrote:
> On Feb  6 08:29, Marco Atzeri wrote:
>> on cygwin-1.7.28 64 bit but not on cygwin-1.7.27,
>> (only system difference) compiling octave I see:
>>
>> ----------------------------------------------------------------
>> /pub/devel/octave/octave-3.8.0-2/src/octave-3.8.0/liboctave/system/oct-passwd.cc
>> :114:25: error: '::getpwent' has not been declared
>>     return octave_passwd (::getpwent (), msg);
>>                           ^
>> [...]
>> Is something slightly changed in the  relative system headers ?
>
> I don't know anything about octave, but what has changed is that newlib
> is finally introducing BSD-like visibility macros.  The pwd.h header now
> contains this:
>
>    #if __XSI_VISIBLE >= 500
>    struct passwd   *getpwent (void);
>    void             setpwent (void);
>    void             endpwent (void);
>    #endif
>
> The default settings per the sys/cdefs.h header are:
>
>    #define __POSIX_VISIBLE         200809
>    #define __XSI_VISIBLE           700
>    #define __BSD_VISIBLE           1
>    #define __ISO_C_VISIBLE         2011
>
> unless your environment defines one of
>
>    _XOPEN_SOURCE
>    _POSIX_C_SOURCE
>    _ANSI_SOURCE
>    _C99_SOURCE
>    _C11_SOURCE
>    _GNU_SOURCE
>
> Have a look at the end of /usr/include/sys/cdefs.h, it explains things.
>
>
> Corinna

thanks for the hints

for what I can see  "_GNU_SOURCE" is defined in both cases at
configure stage and reported in config.status and config.h

I will look to compare the preprocessor output to see why building
on  1.7.28 the "/* Everything and the kitchen sink. */" is not pulled in

Regards
Marco







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