Bison builds some pre-existing parser software into your program.
Two of the parsers included with this program are covered by the GNU General
Public License (the GPL). Nontheless they can be built into programs that are
themselves not covered by the GPL. This is because that when the parsers are
part of the output from bison all restrictions on the code is lifted. This
special exception was added by the FSF in version 1.24 of bison.
Allso included in this package are two other parsers that are covered by an
even less restrictive license.

The files /usr/lib/bison.simple and /usr/lib/bison.hairy contain the parsers
that are covered by the GPL, and are documented in the bison(1) manual page
and in an info file that can be read with the command "info bison".

The parsers with the less restrictive license are generated by the "mkparser"
and "mkparserclass" commands, and are part of the Debian "bison"
package. "mkparser" generates a C parser, and "mkparserclass" generates a
C++ class containing a parser. The documentation on these parsers can be found
in /usr/doc/bison/parser.doc.gz and
/usr/doc/bison/parserclass.doc.gz .

For license information, read the file /usr/doc/copyright/bison, and
/usr/doc/copyright/bison-parsers . The full text of the GPL is in
/usr/doc/copyright/GPL.
