GPL license (possible solution)
MR K P SCHUPKE
Tue, 11 Jun 2002 15:51:05 +0100
Having Read the GPL license one solution for binary distributions may be to
install in two packages - one for any GPL'd stuff, and one for the rest - if
are aggregated onto the same media the GPL only applies to the originally
stuff. This would be enough if the libraries are dynamically linked. If
you could always distribute a ghc.o in one package and the library.a files in
and do a final link as part of the installation process (the user must have a
run ghc anyway).
Martin Norbäck wrote:
> I have a problem with the readline license that applies to ghc, and
> programs compiled with ghc.
> The readline library is under the GPL license. This means that any
> program (including ghc) that links with this library must itself be
> licensed under the GPL.
> This is very unfortunate. I would suspect that this only applies if you
> actually use the Readline module, so I can just avoid that.
> However, using -package lang (to get the GetOpt module) links with
> -lreadline even though it's not necessary. So the resulting binary is
> dynamically linked with libreadline. My meaning is that this is not a
> license violation of readline, but I am no lawyer, and I recall Richard
> Stallman of the FSF says differently.
> Linking statically with -lreadline may be a solution, since the linker
> is smart and removes unused code in statically linked libraries. If only
> I could be sure that that's the fact.
> I think most ghc users have better things to do than to track licenses
> of libraries that ghc links your program to, so I suggest that the
> Readline module is either removed or moved to a separate package, so
> that there is no doubt that it's not linked in.
> Another question is what to do with ghc, ghc uses readline and is not
> licensed under the GPL. A possible GPL violation, at least it would be
> according to Richard Stallman.
> Martin Norbäck Safelogic AB
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