Re: [Mingw-users] declaration of C function ... conflicts with ... error: previous declaration

[J D. <d3...@gm...>]

On Sat, Nov 20, 2010 at 3:23 PM, Alois Schloegl
<alo...@gm...> wrote:
>
>
> On Sat, Nov 20, 2010 at 10:36 PM, Alois Schloegl <alo...@gm...>
> wrote:
>>
>> Moreover, in the past (about half a year ago) it was possible to use mingw
>> as cross-compiler for the same project having the user-defined function
>> sopen. And it compiled also with MinGW on Windows. So, it seems to me that
>> some changes in Mingw might be the cause for this conflict.
>>
>>
>>
>
> I investigated the issue in more detail. The conflict is triggered when
> including <zlib.h> in my project. Without including <zlib.h> no naming
> conflict occurs. (so its not due to a change in MinGW). <zlib.h> includes
> <zconf.h>, which includes <unistd.h> which includes <io.h>. Maybe the use of
> MS C library specific extensions can be disentangle from standard gcc
> functions.
>
> Please note also, that  according to this site
>      http://msdn.microsoft.com/en-us/library/w7sa2b22%28VS.80%29.aspx
> the use of sopen has been deprecated in VC2005 (and presumably later).
>
> Would it be a viable option, to use DEFINES for avoiding name space
> pollution from legacy MS C library ?

probably something like WINVER ?
>
>    Alois
>
>
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