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Message-ID:	<38CFA385.B0594DCE@sigma6.com>
Date:	Wed, 15 Mar 2000 09:51:49 -0500
From:	Jeff Sturm <jsturm AT sigma6 DOT com>
Organization:	AppNet
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To:	Axel Riese <Axel DOT Riese AT risc DOT uni-linz DOT ac DOT at>
CC:	=?iso-8859-1?Q?=D8ystein?= O Johansen <OJOHANS AT statoil DOT com>,
	Cygwin
	Mailing List <cygwin AT sourceware DOT cygnus DOT com>
Subject:	Re: Linking problem: IsWindowVisible
References:	<200003151438 DOT PAA85199 AT andromeda DOT risc DOT uni-linz DOT ac DOT at>

Axel Riese wrote:
> > > Yes, I worked that out by self. But I still get undefined
> > > reference to 'IsWindowVisible' ?
> >
> > You may be missing a declaration for IsWindowVisible.  Does the source
> > file have #include <windows.h> anywhere?
>
> Hm, in this case you should have problems at compile time, not at
> link time, shouldn't you ?

Not necessarily.  In the absence of a declaration, C will guess "int
IsWindowVisible()", which in this case is wrong.

BTW you can catch such problems by compiling with -Wall:

jcs.c:4: warning: implicit declaration of function `IsWindowVisible'

-- 
Jeff Sturm
jsturm AT sigma6 DOT com

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