Linking restrictions and shared libraries
cowan at mercury.ccil.org
Mon Mar 12 12:19:49 UTC 2001
Dr. David Gilbert scripsit:
> What I am unclear of is shared libraries; is there something actually
> copied into the result as part of the linking stage? If I was to rewrite
> a header for a GPL library so that I didn't make use of the GPLd header
> could I then shared link it into a commercial app?
The FSF says no, but nobody knows for sure: when the GPL was written,
shared libraries were unheard-of.
> Can I write a commercial app which is not linked with a GPL library but
> opens it with dlopen at run time?
Arguably this does create a derived work, at least in memory, thus
violating the GPL. (It is settled that the copy of a program
that you make in loading it from disk to memory *is* a copy, and
must be explicitly or implicitly licensed by the copyright owner.)
John Cowan cowan at ccil.org
One art/there is/no less/no more/All things/to do/with sparks/galore
More information about the License-discuss