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Date: Wed, 16 Jul 2003 16:39:13 +0100
From: Elfyn McBratney <elfyn AT emcb DOT co DOT uk>
X-X-Sender: elfyn AT ellixia
Reply-To: cygwin AT cygwin DOT com
To: Cary Lewis <clewis AT mobilecom DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: License question about Cygwin
In-Reply-To: <3E2D8043936AD611AF7D00508B5E9F4B48B482@server3.mobilecom.com>
Message-ID: <Pine.CYG.4.55.0307161635340.3852@ellixia>
References: <3E2D8043936AD611AF7D00508B5E9F4B48B482 AT server3 DOT mobilecom DOT com>
Mail-Followup-To: cygwin AT cygwin DOT com
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On Wed, 16 Jul 2003, Cary Lewis wrote:

> As the Cygwin.dll is licensed under GPL, any "Program" that links to it must
> be released under GPL as well.

Under section 10 of the GPL, if the "program" is OSD compatible then the
"program" is not auto-GPL'd.

> My question is, what if the "Program" also links to proprietary .dlls that
> are authored by someone else. That source can not be published (I don't even
> have access to it). Furthermore these .dlls are not freely available.

Are these DLL's Cygwin DLL's ? i.e. not native Windows DLL's.

> Does that mean that even if I publish all of my source code, I would still
> be violating the GPL because I couldn't publish the source code to the
> proprietary libraries.

Yes.

Elfyn

-- 
Elfyn McBratney, EMCB  |  http://www.nongnu.org/wwwauth/
http://www.emcb.co.uk  |  http://www.emcb.co.uk/webauth/
elfyn AT emcb DOT co DOT uk       |  wwwauth-users AT nongnu DOT org


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