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From:	Chris Faylor <cgf AT cygnus DOT com>
Date:	Wed, 15 Mar 2000 10:01:54 -0500
To:	Cygwin Mailing List <cygwin AT sourceware DOT cygnus DOT com>
Subject:	Re: Linking problem: IsWindowVisible
Message-ID:	<20000315100154.D26330@cygnus.com>
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In-Reply-To:	<200003151457.PAA85319@andromeda.risc.uni-linz.ac.at>; from Axel.Riese@risc.uni-linz.ac.at on Wed, Mar 15, 2000 at 03:57:56PM +0100

On Wed, Mar 15, 2000 at 03:57:56PM +0100, Axel Riese wrote:
>> > 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:
>
>Yes, clear. But I have my doubts that one can get an undefined reference
>due to a missing declaration. Anyway, adding -mwindows or -luser32
>should solve the problem.

Your doubts are wrong.  If you haven't declared the function correctly
this is exactly what you'll get.

cgf

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