Bison is a free implementation of yacc.
4.9.1. UNIX or Win32 Cygwin: bison
Bison is available for most of the UNIX-like platforms
and as the bison package from the
If GNU Bison isn't already installed or
available as a package for your platform, you can get it at:
After correct installation, typing at the
bash command line prompt:
should result in something like:
bison (GNU Bison) 2.3
Written by Robert Corbett and Richard Stallman.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
However, the version string may vary.