The FORTRAN preprocessor supports following compiler directives of the following syntax:
$[OPTION] SET (identifierlist)
$[OPTION] IF (conditionlist)
$[OPTION] INCLUDE 'filename'
If the $INCLUDE directive is used and the user include file contains embedded SQL
commands, there cannot be duplicate host variable type declaration
sections. The program unit being preprocessed and the file that is
included cannot both contain BEGIN DECLARE SECTION and END DECLARE
SECTION commands. However, one or the other may contain a host
variable type declaration section.
The $ must be the first character in the line, and must be followed by
any compiler directive.
Refer to the HP FORTRAN 77/HP-UX Reference for HP
9000 Series 800 systems (Part Number 92430-90005) or the FORTRAN/9000 Reference
(Part Number B2408-90003) for HP 9000 Series 700 systems (Part Number B2408-90003).