But if you mean the GPL, then [...] I most certainly
can charge for
it and I can incorporate it into my software. I just have to comply
with the terms of the licence (mostly making _all_ the sources
available).
For GPL v1 and v2, yes. For v3, I'd hazard the opinion that nobody
except the FSF's lawyers (and probably not even them, until some case
law is made) knows what is permitted; the thing is a Byzantine morass,
and I strongly recommend anyone contemplating doing anything it affects
actually read it rather than just assuming it's an evolutionary step
from GPLv2.
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