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NASM - FASM license (Announce)

posted by ecm Homepage E-mail, Düsseldorf, Germany, 11.09.2010, 01:53

> > Real Public Domain works can't be Copylefted.
>
> Since they per definition must be (no Copyright).

Now you're either just ignorant or trolling. Read the article I linked. "Copyleft" is not the absence of copyright. Public Domain works are neither Copylefted nor copyrighted. (Technically they might be copyrighted but the copyright's owner grants you all rights, without any kind of warranty.)

> > No, FASM uses a custom "2-clause BSD with Copyleft" license
>
> So NASM is more free because it lacks the restriction prohibiting to
> switch it to the more restrictive GPL?

That's how software licensing works boy. Note that with the modified emphasis, your statement is very clear on why NASM is freer - its license is less restrictive. You are free to copy NASM's source code partly or in whole and then use that in other works (be they proprietary, GPL, or under most any other software license) with only minimal requirements. This of course doesn't mean you can enforce usage of your new version instead of the official NASM version, so you can't restrict the original this way.

I won't explain Copyleft to you too. Just look it up already!

FASM's license contributes to what is called "license proliferation", and because of the comment regarding the GPL I think that is intentional. This means, even though FASM's license is similar to the GPL with Copyleft (look it up!) and all, it is incompatible with other such Copyleft licenses. It might be interesting that technically, FASM's license might have been GPL-compatible if not for explicitly prohibiting the GPL - because distribution under the GPL's terms would insure all the requirements of the FASM license are met. The GPL would then only add restrictions, which isn't prohibited by the FASM license.

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