usr/src/cmd/yacc/files

        /* this file has the location of the parser, and the size of the progam desired */
        /* It may also contain definitions to override various defaults: for example,
        /* WORD32 tells yacc that there are at least 32 bits per int */
        /* on some systems, notably IBM, the names for the output files and tempfiles must
        /* also be changed  */

        /* location of the parser text file */
# define PARSER "/usr/lib/yaccpar"

        /* basic size of the Yacc implementation */
# define MEDIUM