Experimental Physics and
Industrial Control System

Korhonen Timo <[email protected]> · Mon, 17 Dec 2001 11:06:09 +0100

john sinclair wrote:
When I say "control multiple displays", I mean that one program is running
and writing to/interacting with many remote X servers.
I am by no means a Qt expert, but I believe this should be no problem.

So, does Trolltech intend to release Qt version 3 in a free license
format?
Qt/X11 is available with a GPL and QPL (Gnu, Qt Public License,
respectively),

which both are "free" licenses in the open source sense, and requiring
that any

code developed using Qt/X11 Free edition is also open source (if
distributed.)

I could not easily figure out what is the difference between GPL and QPL.

There are also commercial licenses available. And, the Windows (and Mac)
versions

are only available with commercial licenses (if I understand it correctly.)

So, Qt/X11 is free software but Qt/Win and Qt/Mac are not.
Trying to figure out what can and what can not be done under different
types of licenses

gives me a headache. It would be nice if somebody clarified the license
issues concerning

various software components that are used together with Epics (no, I am
NOT volunteering

to do this!)
Timo
--

Timo Korhonen PSI (Paul Scherrer Institut), SLS
CH-5232 Villigen PSI
tel + 41- 56 3103262 fax + 41 - 56 310 3151
e-mail: [email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System