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Message-Id:	<200002281737.LAA23633@hp2.xraylith.wisc.edu>
To:	Kyle Downey <kyle DOT downey AT amberarcher DOT com>
cc:	cygwin AT sourceware DOT cygnus DOT com
Subject:	Re: postgres link failure on cygwin 1.0
In-reply-to:	Your message of "28 Feb 2000 11:32:28 EST."
	<20000228163228 DOT 4172 DOT qmail AT pb151 DOT postoffice DOT net>
Date:	Mon, 28 Feb 2000 11:37:11 -0600
From:	Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>

Kyle Downey <kyle DOT downey AT amberarcher DOT com> writes:
> I'm getting a link failure looking for _sys_nerr (from errno.h) when compilin
> g
> postgresql 6.5.3 on cygwin 1.0 (CD distro, unmodified except for addition of
> the CWilson /usr/local and cygipc 1.05 distros. I have notified the maintaine
> r
> about this, but since he says in the docs it compiles on b20.1, I wanted to
> see if it was just a Cygwin b20.1 -> 1.0 change, esp. because it's a system
> call that's missing. I may just have to add a library that I don't know
> about.
> 
> What puzzles me is that _sys_nerr is defined in libcgywin.dll, which is being
> linked against:

You've probably fallen into the trap of *declaring* _sys_nerr as an
external variable without importing it from the DLL. 

Check for the following in your code:
  
  extern int _sys_nerr;

which is incorrect. Remove that and use the definition from <errno.h>,
which is:

  extern int _sys_nerr __declspec(dllimport);

Regards,
Mumit


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