yacc − GNU Project parser generator yacc [OPTION]... FILE Yacc (Yet Another Compiler Compiler) is a parser generator. This version is a simple wrapper around It passes option −y, −−yacc to activate the upward compatibility mode. See for more information. Written by Paul Eggert. Report bugs to <bug‐firstname.lastname@example.org>. Copyright © 2020 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. The full documentation for bison is maintained as a Texinfo manual. If the info and bison programs are properly installed at your site, the command infobison should give you access to the complete manual.