[sugar] AUTHORS and COPYING

[Dave Crossland]

On 09/01/2008, Jani Monoses <jani at ubuntu.com> wrote:
>
> In particular sugar-artwork includes a copy of the GPL, but the sources
> contain an LGPL and a BSD style licensed file as well.
...
> sugar, sugar-base and sugar-artwork provide a copy of GPL but the source
> file headers mention the LGPL.

This is actually fine. (IMHO, IANAL :-)

GPL requires that the combined work of the program be under a license
no _more_ restrictive than the GPL, and since LGPL and X11-style
licenses are _less_ restrictive, so they can be combined with GPL
programs while remaining under their current license.

The FSF calls these "compatible" with the GPL - thats the word to keep
an eye out for, and the FSF licensing page at
http://www.gnu.org/licenses/license-list.html#SoftwareLicenses lists
them.

However, some simple all permissive non-copyleft licenses have one or
two restrictions incompatible with the GPL and the FSF also lists them
on that page.

(The license used by FreeBSD until 1999 was GPL incompatible, but was
finally changed to be GPL compatible. So, please consider never using
the term "BSD style license" again and using "X11-style license." Some
people use "MIT license" for this, but that is also ambiguous because
MIT has many licenses.)

-- 
Regards,
Dave