question about gpl-commercial dual licencing
Say someone creates a library libfoo in the C language. The library is
dual-licenced -- under the GPL and under a commercial licence. GPL is
for open-source consumers and commercial licence is for closed-source
Now I create Python binding to that library - pyfoo. Now I would like to
dual-licence it myself, under the same terms -- GPL and a commercial
Now to get the right of dual-licensing, do I have to obtain a commercial
licence from the author of libfoo?
If yes, why? If no, why not? Please elucidate. Thanks.