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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Thu, 11 Dec 2003 10:07:41 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: "Hughes, Bill" <Bill DOT Hughes AT cox DOT co DOT uk>
cc: cygwin AT cygwin DOT com
Subject: RE: About Cygwin license
In-Reply-To: <5D60432AF619D81183C80002A5419F5D07F532@nnhmsw1.cox.co.uk>
Message-ID: <Pine.GSO.4.56.0312111002360.14948@slinky.cs.nyu.edu>
References: <5D60432AF619D81183C80002A5419F5D07F532 AT nnhmsw1 DOT cox DOT co DOT uk>
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On Thu, 11 Dec 2003, Hughes, Bill wrote:

> Sent: 11 December 2003 14:28 From: Igor Pechtchanski
> > Common sense dictates that socket connections cannot be thought of as
> > "linking" (which is what the GPL covers).  After all, connecting with a
> > proprietary ssh client to a GPL'd ssh daemon on Linux doesn't make the
> > client GPL'd (AFAIK).  Now, if your program is actually linked to some of
> > PostgreSQL DLLs, that's a whole different story...
>
> Isn't PostgreSQL under a BSD license anyway so that wouldn't be a worry
> either...
> unless this is a Cygwin dll for PostgreSQL?

With the disclaimer (which you snipped) that IANAL, and any opinion you'll
get is a personal one:
The GPL is viral, i.e., anything linked (even dynamically) to a GPL'd
library is itself GPL'd, *except* when the software so linked is
distributed under an open-source license.  Transitive linking is still
linking, AFAIK.  So, linking with cygwin1.dll doesn't make PostgreSQL
GPL'd, as BSD is an accepted open-source license.  But any proprietary
software linked to PostgreSQL (and, transitively, to cygwin1.dll) *will*,
IMO, become GPL'd.  Again, YANALATEYHSMBSI.  Please consult a lawyer.
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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