Re: Selling a GTK+ application for money?

[Owen Taylor <otaylor redhat com>]

Paul Cardwell <arc@mama.indstate.edu> writes:

> I can see major flaming coming my direction, but I need to know.
> 
> I am writing an application in GTK+ and wish to sell it to make money.  Is
> this possible using GTK+ and linking it in via shared libraries?
> 
> Should I be using Qt w/ commercial licensing or a Motif gui library?
> 
> I'd rather find out now than later if it is legal and acceptable.

GTK+ is licensed under the GNU LGPL. See the file COPYING
in the distribution for full details.

But basically (unlike Motif and Qt ;-) you can use GTK+ in a
commercial product without any requirement to pay royalties or
license charges and without any requirement to distribute
your sources.

The most relevant restrictions are:

 - You must allow users to relink your program with modified
   versions of GTK+, either by linking dynamically (which is
   going to be the case in almost all circumstances) or by
   providing your object files.

 - If you modify GTK+ itself, then you must distribute the
   source to the modifications.

Regards,
                                        Owen