Cygwin licensing and redistribution, GPLv2, GPLv3
Eric Blake
eblake@redhat.com
Fri Jan 28 00:15:00 GMT 2011
On 01/27/2011 04:57 PM, tom honermann wrote:
> I've been looking into Cygwin licensing and redistribution regarding the
> Cygwin DLL and various GNU utilities. The current Cygwin license
> (http://cygwin.com/licensing.html) states
Wrong list. Ask on cygwin-licensing.
> The way I
> interpret this, this effectively means that no entity other than RedHat
> can distribute GPLv3 GNU utilities dynamically linked with the Cygwin
> DLL and include the Cygwin DLL with the GNU utilities (without
> additional permissions by RedHat).
Short answer - wrong interpretation. The cygwin license exception
specifically states that a GPLv3 program (by virtue of being an OSI
approved license) can be linked against cygwin and distributed as though
the GPLv2 of cygwin were not present. Therefore, the GPLv2-only nature
of cygwin does not interfere with the GPLv3 license of the program.
--
Eric Blake eblake@redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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