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Message-ID:	<3F295B51.2080005@cygwin.com>
Date:	Thu, 31 Jul 2003 14:09:21 -0400
From:	Larry Hall <cygwin-lh AT cygwin DOT com>
Reply-To:	cygwin AT cygwin DOT com
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To:	=?ISO-8859-1?Q?J=E9r=F4me_DESPATIS?= <jdespatis AT yahoo DOT fr>
CC:	cygwin AT cygwin DOT com
Subject:	Re: using a dll created by cygwin in msvc++
References:	<20030731175944 DOT 43249 DOT qmail AT web11701 DOT mail DOT yahoo DOT com>
In-Reply-To:	<20030731175944.43249.qmail@web11701.mail.yahoo.com>

Jérôme DESPATIS wrote:

> i've created a .dll with cygwin
> 
> i'd like now to create a simple program under msvc++
> that use functions of this dll
> 
> when i compile my very simple program, i get those
> errors at link step: unresolved external symbol _foo
> where foo is a function of my dll
> 
> so how can i use this dll in my program ? maybe a
> foo.lib is missing (is there a way to create it from a
> dll ?), or maybe is there another way to do so ?


You need an import library to link against, yes.  See
<http://cygwin.com/cygwin-ug-net/dll.html> for instructions
on building DLLs and import libraries with Cygwin.  Keep in
mind that if you're using cygwin1.dll in your resulting DLL
(i.e. you're not using the '-mno-cygwin' flag for gcc) then
you may end up with 2 C runtimes in your final executable.
See the FAQ and <http://cygwin.com/ml/cygwin/2003-07/msg01761.html>
for some information on this.  There's plenty more in the email
archives too if you're interested.


-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
838 Washington Street                   (508) 893-9889 - FAX
Holliston, MA 01746


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