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   yacc.1p    ( 1 )

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Примеры (Examples)

Access to the yacc library is obtained with library search
       operands to c99.  To use the yacc library main():

           c99 y.tab.c -l y

       Both the lex library and the yacc library contain main().  To
       access the yacc main():

           c99 y.tab.c lex.yy.c -l y -l l

       This ensures that the yacc library is searched first, so that its
       main() is used.

       The historical yacc libraries have contained two simple functions
       that are normally coded by the application programmer. These
       functions are similar to the following code:

           #include <locale.h>
           int main(void)
           {
               extern int yyparse();

               setlocale(LC_ALL, "");

               /* If the following parser is one created by lex, the
                  application must be careful to ensure that LC_CTYPE
                  and LC_COLLATE are set to the POSIX locale. */
               (void) yyparse();
               return (0);
           }

           #include <stdio.h>

           int yyerror(const char *msg)
           {
               (void) fprintf(stderr, "%s\n", msg);
               return (0);
           }