Greetings for the day !!

I am trying to modify the  GNU Pascal fronted. I have gone through GNU Pascal manual and  GNU Pascal internals site and this is what I have understood.

1.Lexer -  I need to modify pascal-lex.l file and using flex compile it to lex.yy.c file.Rename this file to pascal-lex.c

2. Parser - I need to modify parse.y file and using bison compile it to parse.c file.

Now what I am supposed to do next, to make these changes reflect when I compile a pascal file ?

Thanks a lot in advance.

Thanks and regards,

Rajat