[cap-talk] [Off-topic] License compatibility (was: announcing Allmydata-Tahoe v0.6)

[David Hopwood]

zooko wrote:
> NEW VERSION RELEASED -- Allmydata-Tahoe version 0.6
[...]
> LICENCE
> 
> Tahoe is offered under the GNU General Public License (v2 or later),
> with the added permission that, if you become obligated to release a
> derived work under this licence (as per section 2.b), you may delay
> the fulfillment of this obligation for up to 12 months.  If you are
> obligated to release code under section 2.b of this licence, you are
> obligated to release it under these same terms, including the 12-month
> grace period clause.

Is that GPL-compatible (in the sense that a combination of code under
the GPL and under this license could be re-released under the GPL)?
It doesn't seem so: the requirement to release with the 12-month grace
clause conflicts with section 2.b of the original GPL.

To make it GPL-compatible, the second sentence should be:

  If you are obligated to release code under section 2.b of this license,
  you are obligated to release it either under the terms of the unmodified
  GNU General Public License (v2 or later), or under the terms of this
  license, including the 12-month grace period clause.

-- 
David Hopwood <david.hopwood at industrial-designers.co.uk>