Fw: Query about GNU-GPL

[Alfred M. Szmidt]

   Including code from non-free libraries will make your package non-free.

Not true.  The result would be illegal, not non-free.  For it to be
legal the whole work has to be licensed under the GNU GPL.

Once can add a special execption to the GPLed library so one allows
for non-free libraries to use it, see the GPL FAQ "How can I allow
linking of proprietary modules with my GPL-covered library under a
controlled interface only?"

The GPL FAQ has more answer releated to this.