[Marxism] this vi-rus is evil!

Jose G. Perez elgusanorojo at bellsouth.net
Sun Feb 1 22:20:07 MST 2004

Adam: "You can build proprietary systems on *top* of existing
open-source software. OSX is an excellent example of this; the core of
the system is FreeBSD, which is open, but the GUI and all the doo-dads
that go with it are proprietary Apple systems."

This is precisely the difference between "open source" and "free" (as in
freedom) software. The GNU general public license forces you to license
as free software anything you distribute that incorporates free
software: you can't build anything into GNU/Linux and distribute it that
is not free software. You are forbidden from incorporating free software
into an app unless that app is also licensed as free software.

The license BSD uses does not impose those restrictions. You can take
"open source" code and incorporate it into a closed-source commercial
product, as Apple has done. If FreeBSD had been licensed as free
software, all the Apple additions and changes would have had to have
been distributed as free software, source code and all, or as a
completely separate set of programs that could not be distributed as a
single item or collection together with the free software.


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