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Re: ReRegarding iraf

On Mon, Jan 10, 2005 at 11:35:07AM -0500, Glenn Maynard wrote:
> On Mon, Jan 10, 2005 at 11:21:24AM -0500, Justin Pryzby wrote:
> > IRAF has a kind of custom government license which was previously
> > decided [0] to be free.  IRAF wants to link with NCAR which is (now)
> > available under the GPL.  Is that allowed, even though IRAF is not
> > GPL?  IRAF is not a "derivitive" of NCAR, although the resulting
> > executable binaries would be, I guess.  GPL seems to say so:
> You can always link GPL material with non-GPL material, so long as that
> other work is GPL-compatible.  
What defines GPL compatibility?  Modify and distribute?

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