Re: Re: WIN32 errno patch

One can't just #undef errno on windows because it is defined as follows:

#if defined(_MT) || defined(_DLL)
extern int * __cdecl _errno(void);
#define errno (*_errno())
#else /* ndef _MT && ndef _DLL */
extern int errno;
#endif /* _MT || _DLL */

So when building a dll or a multithreaded application it is not a plain
variable but call to the _errno() and after #undef errno one will lose
errno completely. For the same reason it is impossible to use something
like 'errno=0;'.

Mikhail Terekhov

Tom Lane wrote:
>
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Any idea where we are on this?
>
> I'm planning to #undef errno around the three routines that need to get
> at plain errno. Not done yet though...
>
> regards, tom lane
>
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