Justin Pryzby wrote: > On Sun, Dec 19, 2004 at 08:59:06PM -0800, Josh Triplett wrote: >>Justin Pryzby wrote: >>>What kind of license is associated with code produced by Yacc? >>Presuming this modified yacc isn't trivially replaceable with a Free >>yacc, this would prevent these packages from being uploadable to main. > > I was afraid you'd say that. I wouldn't know what changes to make to > a Free yacc without looking at a (nonfree) diff between IRAF's xyacc > and UNIX yacc..
Right; to do such reimplementation safely typically requires one person to read the non-free source and document, and another person who has never seen the non-free source to implement the Free version based on the documentation. > Normal compilation won't require rebuilding this file (as in, I never > noticed before I considered the nonfreeness and checked). What about > contrib? "Depends on non-free component to build" (from true source). No, because the yacc output itself contains portions of the non-free UNIX yacc code (specifically, the parser). One suggestion: you might be able to make the necessary modifications to BSD yacc, which I think descends from the original UNIX yacc by way of BSD UNIX and the whole AT&T vs. BSD issue. Unless it has been drastically rewritten, its internal structure is probably far closer to what the IRAF team used as a basis for their modified yacc. - Josh Triplett
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