Re: about GNU GPL

[Owen Taylor <otaylor redhat com>]

On Fri, 2003-05-09 at 19:19, Lucas Clemente Vella wrote:
> musicinsect_2000 wrote:
> >    Even now I still don't understand if I use a purely free develop tool such 
> > as GTK to write a software, can I sale it? My sofeware is wrote by myself or 
> > my company without other's GPL code,  is my sofeware privatel own?
> >    Use a free toolkit to develop a sofeware , it doesn't mean my product is 
> > free or GPL,isn't it?
> I suggest you to search in www.gnu.org first.
> If you use a GPL library, you have to put under the GPL license all the 
> programs you made whit it, othewise, your program will be illegal.
> But if you use a LGPL (Lesser GPL) library, you can make your program 
> proprietary. I don't remember if the GKT is under the GPL or LGPL, look 
> in www.gtk.org.

GTK+ is under the LGPL; use in proprietary applications is certainly
allowed.

See http://mail.gnome.org/archives/gtk-list/2003-May/msg00008.html
for a short common-sense summary of the LGPL.

Regards,
                                                  Owen