On Fri, 2002-08-02 at 10:58, Andrew Lau wrote: > On Fri, Aug 02, 2002 at 12:34:56PM +0200, Grzegorz Prokopski wrote: > > W li?cie z ?ro, 31-07-2002, godz. 16:40, Andrew Lau pisze: > > > Has the GPL been given additional OpenSSL exclusion clause or sth? > > Please clarify > > I've just checked the COPYING file provided with the pt tarball, and > it's the plain vanilla GPL2 license, without an OpenSSL Toolkit > License Exception like that as found within the CUPS license: > > === > /usr/share/doc/cupsys/copyright > > License Exceptions > > In addition, as the copyright holder of CUPS, Easy Software Products > grants the following special exceptions: > > 1. Apple Operating System Development License Exception; > ... > 2. OpenSSL Toolkit License Exception; > a. Easy Software Products explicitly allows the compilation > and distribution of the CUPS software with the OpenSSL > Toolkit. > > No developer is required to provide these exceptions in a derived work. > === > > As cups-pt (the current Debian package name) is a GTK+ front-end to > CUPS, can it be classified as a derived work? Does it matter? I have > no knowledge of the current situation in dealing with OpenSSL > libraries. I just assumed they could go in main as there are other > packages such as apache-ssl that are in main.
Probably no more or less than, say, any program on your system is a derived work of glibc. (I'm assuming here that cups-pt links against libcups to do its magic.) Note also that clause about not being required to carry the exceptions forward; that likely means that linking to libcups is fine as long as libcups doesn't use either of the two exceptions. I would strongly recommend, however, that someone get a license exemption from upstream cups-pt for OpenSSL. I'm planning at some point to turn on SSL support in the cupsys packages. I've already tried once, but ran into similar problems with gs-esp (which I may be able to work around). I'm also seriously considering trying out the OpenSSL compatibility in recent gnutls. The problems with license compatibility in libcupsys are enough to drive me batty.
