Greeting for the day.

I am a student working on GNU PASCAL Porting to adapt a version of HP PASCAL m68k for school purposes. I was trying to do the following on which I am stuck. Can you please provide me some insight and lead a path to achieve the same. Thanks a million in advance

1. I want to include the files using #include <filename> instead of {$INCLUDE}. I am unable to trace where the changes has to happen. Also all the directives in the similar way without the use of "{}".