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Appendix E Open Source Licences
NSA320 User’s Guide
585
a) the GNU General Public License as published by the Free Software Foundation;
either version 1, or (at your option) any later version, or
b) the "Artistic License".
For those of you that choose to use the GNU General Public License, my
interpretation of the GNU General Public License is that no Perl script falls under
the terms of the GPL unless you explicitly put said script under the terms of the
GPL yourself.
Furthermore, any object code linked with perl does not automatically fall under
the terms of the GPL, provided such object code only adds definitions of
subroutines and variables, and does not otherwise impair the resulting interpreter
from executing any standard Perl script. I consider linking in C subroutines in this
manner to be the moral equivalent of defining subroutines in the Perl language
itself. You may sell such an object file as proprietary provided that you provide or
offer to provide the Perl source, as specified by the GNU General Public License.
(This is merely an alternate way of specifying input to the program.) You may also
sell a binary produced by the dumping of a running Perl script that belongs to you,
provided that you provide or offer to provide the Perl source as specified by the
GPL. (The fact that a Perl interpreter and your code are in the same binary file is,
in this case, a form of mere aggregation.)
This is my interpretation of the GPL. If you still have concerns or difficulties
understanding my intent, feel free to contact me. Of course, the Artistic License
spells all this out for your protection, so you may prefer to use that.
-- Larry Wall
This Product includes gd software under below license
Portions copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
2002 by Cold Spring Harbor Laboratory. Funded under Grant
P41-RR02188 by the National Institutes of Health.
Portions copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 by
Boutell.Com, Inc.
Portions relating to GD2 format copyright 1999, 2000, 2001, 2002
Philip Warner.
Portions relating to PNG copyright 1999, 2000, 2001, 2002 Greg