The following variables are defined to make targets and rules easier:
     
- 
COMPILER 
- is  the  complete  compiler  commandline,  with  all  options  added,  after  all
     Makefile variables have been examined.
     
- 
DATESTR 
- contains the date.
     
- 
UNITPPUFILES 
- a list of unit files that will be made. This is just the list of unit objects,
     with the correct unit extension appended.