On Oct 14, 2015 10:02 PM, "Ben Finney" <ben+python@benfinney.id.au> wrote:
>
> Nathaniel Smith <njs@pobox.com> writes:
>
> > That's under Apache 2, so it can't be used by GPLv2 packages, or any
> > package that might be used by GPLv2 packages.
>
> I'm not sure what the claim is here, but it seems false to me.
>
> Apache License 2.0 permits a derived work to be released under a
> different license (even a non-free license). See Apache License 2.0 §4.

The FSF believes that Apache 2 is incompatible with GPLv2 (but v3 is OK), IIRC because of some technicalities involving the patent provisions. (I'm sure you can google up infinite detail if you want -- I'm just the messenger.) There are others who disagree and think it's fine, but no one wants murkiness when it comes to licenses, so people with BSD or GPLv2 projects are unlikely to risk incorporating code from a project under Apache 2.

-n