Alexandre Oliva aoliva@redhat.com
Mon Jul 16 18:10:00 GMT 2007

On Jul 15, 2007, Michael Eager <eager@eagercon.com> wrote:

> It's really not possible to "un-know" the original GPLv3 patch and
> create an identical GPLv2 from scratch.  The second patch is clearly
> and directly derived from the first.

OTOH, the author could claim to have developed the patch on a GPLv2+
tree, which makes the patch GPLv2+ too, and it would be very difficult
for anyone to prove such a claim wrong.

When such a patch is applied to a GPLv3+ tree, the result is GPLv3+,
but this doesn't change the copyright status of the patch itself.

And IANAL ;-)

Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}

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