Looks like our "friends" at Apple bought CUPS
http://www.cups.org/articles.php?L475
and seems they already made a change.
http://www.cups.org/articles.php?L179+I0+T+M10+P1+Q
Article #179: License Exceptions
Created at 10:58 Jul 23, 2004 by mike
Last modified at 14:59 Jul 11, 2007
In addition, as the copyright holder of CUPS, Apple Inc. grants the
following special exceptions:
1. Apple Operating System Development License Exception;
1. Software that is developed by any person or entity for an Apple
Operating System ("Apple OS-Developed Software"), including but not
limited to Apple and third party printer drivers, filters, and backends
for an Apple Operating System, that is linked to the CUPS imaging
library or based on any sample filters or backends provided with CUPS
shall not be considered to be a derivative work or collective work based
on the CUPS program and is exempt from the mandatory source code release
clauses of the GNU GPL. You may therefore distribute linked combinations
of the CUPS imaging library with Apple OS-Developed Software without
releasing the source code of the Apple OS-Developed Software. You may
also use sample filters and backends provided with CUPS to develop Apple
OS-Developed Software without releasing the source code of the Apple
OS-Developed Software.
2. An Apple Operating System means any operating system software
developed and/or marketed by Apple Computer, Inc., including but not
limited to all existing releases and versions of Apple's Darwin, Mac OS
X, and Mac OS X Server products and all follow-on releases and future
versions thereof.
3. This exception is only available for Apple OS-Developed Software and
does not apply to software that is distributed for use on other
operating systems.
4. All CUPS software that falls under this license exception have the
following text at the top of each source file:
This file is subject to the Apple OS-Developed Software exception.
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