HP Fortran Programmer's Guide (September 2007)

Using Fortran directives
Chapter 9200
formatted. The following sections describe the HP Fortran directives.
HP Fortran also recognizes C Preprocessor (cpp) directives. If you compile with the +cpp=yes
option or if the name of the source ends in the .F extension, the source files are first passed to
the C preprocessor for processing. For information about the C preprocessor, refer to cpp(1).