[MPlayer-dev-eng] Re: help on libmpdemux usage (Modifié par Jérôme Cornet)

[Adam Rice]

Quoting D Richard Felker III (dalias at aerifal.cx):
> This is NOT a restriction on use. It's a restriction on what you can
> do when preparing derived works.

Here is what the GPL says about derived works:

  2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in
    whole or in part contains or is derived from the Program or any
    part thereof, to be licensed as a whole at no charge to all third
    parties under the terms of this License.

    c) If the modified program normally reads commands interactively
    when run, you must cause it, when started running for such
    interactive use in the most ordinary way, to print or display an
    announcement including an appropriate copyright notice and a
    notice that there is no warranty (or else, saying that you provide
    a warranty) and that users may redistribute the program under
    these conditions, and telling the user how to view a copy of this
    License.  (Exception: if the Program itself is interactive but
    does not normally print such an announcement, your work based on
    the Program is not required to print an announcement.)

>                                  If you make a derived work that hooks
> the code into the QuickTime API, and distribute a binary of that which
> is dynamically linked to and intended to be used with QuickTime, that
> is definitely not permitted by the GPL, and thus distributing that
> binary is copyright infringement.

I must be going blind, because I can't find the bit of the GPL that says
this. Which of the above three conditions limits what APIs a GPL-derived
program may use?

Adam

-- 
Adam Rice -- adamrice at ntlworld.com -- Blackburn, Lancashire, England