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From: dca@kesmai.COM (David C. Albrecht)
Newsgroups: comp.os.minix
Subject: Re: yacc and/or lex for minix?
Message-ID: <140@kesmai.COM>
Date: Mon, 28-Sep-87 18:10:57 EDT
Article-I.D.: kesmai.140
Posted: Mon Sep 28 18:10:57 1987
Date-Received: Mon, 12-Oct-87 07:13:57 EDT
References: <14607@watmath.waterloo.edu> <1150@laidbak.UUCP> <477@bms-at.UUCP>
Organization: Kesmai Corporation, Charlottesville, VA
Lines: 16
Summary: One problem.

> > I don't know of any PD YACCs, but there is at least one cheap YACC out
> > there. Its name is "Bison" and is available for 25.00 from:
> 
There has been a discussion about this before.  Yes there is no 'public
domain' version of yacc.  Any versions that say otherwise are thefts of
AT&T proprietary code.  Bison is a separate derivation not involving any
AT&T code which is supposed to be if anything a superset of yacc.  The FSF's
software manifesto gets in the way with Bison, however, in a fashion which is
different than say, GNU emacs.  Since Bison uses a parser skeleton which
includes the same manifesto then any code you produce with it is covered by
said manifesto.  I don't know about you but I find someone else dictating the
uses and distribution of something I wrote particularly obnoxious.
It doesn't make Bison totally worthless but it certainly makes it only about
half as useful as it could be.

David Albrecht