Use of GPLed Python extension modules

[Paul Rubin]

Tim Churches <tchur at optushome.com.au> writes:
> If a compiled Python extension module B includes code from some
> other software A which is licensed only under the GPL, do other
> Python programmes, C, which import module B also need to be licensed
> under a GPL-compatible license (assuming C is/are to be distributed
> to third parties)?

It's not enough for B and C to be under "GPL-compatible licenses".
They have to be under the actual GPL.

>From http://www.gnu.org/licenses/gpl-faq.html#LinkingWithGPL

    You have a GPL'ed program that I'd like to link with my code to build
    a proprietary program. Does the fact that I link with your program
    mean I have to GPL my program?

            Yes.