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Mail Archives: cygwin/2004/08/26/11:08:33

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Date: Thu, 26 Aug 2004 17:08:50 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: Giulio Ardoino <giuliastro AT tin DOT it>
Cc: cygwin AT cygwin DOT com
Subject: Re: License
Message-ID: <20040826150850.GH27978@cygbert.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: Giulio Ardoino <giuliastro AT tin DOT it>, cygwin AT cygwin DOT com
References: <20040826162311 DOT 70DF DOT GIULIASTRO AT tin DOT it> <20040826145219 DOT GF27978 AT cygbert DOT vinschen DOT de> <20040826165355 DOT 70E5 DOT GIULIASTRO AT tin DOT it>
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On Aug 26 16:58, Giulio Ardoino wrote:
> Corinna Vinschen wrote:
> 
> > If you distribute a Cygwin DLL binary, you must also provide the sources
> > of the DLL.  It's not enough to point to the Cygwin web page.  For further
> > details, see http://cygwin.com/licensing.html
> 
> Thanks a lot Corinna.
> This means I'm allowed to distribute cygwin dll as long as I distribute
> it with sources, as I understand.
> Let's say I'm writing a commercial program that uses GNU zip under
> windows (and therefore must be distributed with cygwin dll), am I
> allowed to do this as long as I include cygwin and zip sources?

As long as your proprietary application is not load-time or run-time
linked against the Cygwin DLL, or against any other GPL'd library, then
you should be fine by distributing the sources of all open-sourced stuff
in your package.

However, IANAL, so if you want to be on the real safe side, contact a
lawyer which is specialized in licensing issues, or use one of the
official Red Hat contacts given on the http://cygwin.com/licensing.html
web page.


Corinna

P.S.: A simpler option is to use a Windows native GNU zip, which takes
the Cygwin DLL out of the equation.

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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