License of binary packages

[Ole Streicher <olebole@debian.org>]

Hi,

I asked this question already some months ago in debian-mentors, but
didn't get an answer:

How is the license of a binary Debian package determined?

The file debian/copyright only contains the license of the sources;
however the binary license may differ -- f.e. when a BSD source is
linked to a GPL library. Also there is usually more than one license
used in the sources.

Since Debian is a binary distribution, I am wondering if there is any
canonical way to get the license of a (binary) package?

Best regards

Ole