[Rd] Closed-source non-free ParallelR ?

[Peter Dalgaard]

Ian Fellows wrote:
>> Still, if they have code that is compiled and linked to R at running
>> time, then that code must be under the GPL. Again, this is the FSF
>> ?interpretation and certainly not R-core's, not even mine.
>> [...]
> 
> Well, not quite. R.h RDefines.h and RInternals.h are LGPL, so as long as the
> hooks go through these headers, then all is kosher is it not? Otherwise,
> what is the point of having them be LGPL?

Making sure that packages are not GPL just because they include those
header files. The problem is that it is not clear that it suffices in
all cases. It is a legal grey zone, see the "plugin" sections in the GPL
FAQ, for instance.

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