after some extra digging
tango licensing:
BSD (and this is the revised 3 clause BSD)
- is compatible with GPL
- copyright need to be advertised also in the documentation and binary
a commonly used permissive license (which probably you are using when
linking for example network code in almost any operating system).
It does *not* include the original fourth statement of BSD
APL
- similar to BSD, but with some extra protections against the liability
of the licenser, in particular with respect to patents
- these extra restrictions make it incompatible with GPLv2
- it should be equivalent to apache 2.0 (
http://www.opensource.org/proliferation-report )
and so it might be compatible with GPLv3 but I am not 100% sure on this.
In any case the double licensing of tango allows one to use it also
with GPL code
Fawzi
