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回复: Using a non-free binary library in a GPL web application?


From: whistler
Subject: 回复: Using a non-free binary library in a GPL web application?
Date: Wed, 4 Apr 2007 08:47:26 +0000

If you are the copyright holder of all of the GPL'ed parts of the
code, then it will be okay. You just need to grant a specific
exception.

That part of the GPL FAQ merely _discourages_ the act of using
non-free libraries, and not a "restriction".

3 Apr 2007 08:29:29 -0700, Mattt <address@hidden>:
Hello,

I have a question related to the GPL licensing.
I have a GPLed software written in php. It is distributed in source
form over the internet.
In this software, I want to draw some nice graphics. I found a flash
library (released in the binary form, a SWF file) that does the job
nicely. It is released under a license which says "Enterprise licence
(XXX Euros) ; For unlimited use in projects and applications you own
or develop"

I would like to use this non-free library in binary form in my GPL
software.

Considering the GPL FAQ
http://www.gnu.org/licenses/gpl-faq.html#FSWithNFLibs
it looks like it is allowed for me to use this binary library.

But "If you do this, your program won't be fully usable in a free
environment. If your program depends on a non-free library to do a
certain job, it cannot do that job in the Free World." ; I don't
really understand the limitation here? What means "it cannot do that
job in the Free World"?

For information, the non-free library I plan to use works without
calling functions ; I actually give it a XML file, and it produces
output with this XML file.
Also, my software does not depends on the use of this library. It is
more like an "additional feature". I don't know if this detail can
help.

My questions are :
- Can I use the non-free library in my GPL software without problems,
that is my software can stay GPL and his library can stay non-free?
- What do I need to do with the non-free license holder, so that it is
allowed for me to use the license? Do I need a special statement from
him that he will put in his license? Do I need to pay the enterprise
license price?
- Do you have any other ideas/ things related to my problem?


I thought I understood well the GPL license, but this point is clearly
not clear in my head.

Thank you very much for your help!

Matthieu

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