HP Fortran Programmer's Guide (B3908-90031; September 2011)

Migrating to HP Fortran
Chapter 10220
HP Fortran.
To smooth the migration path, HP Fortran includes a number of extensions that are compatible with
HP FORTRAN 77. HP Fortran also includes extensions that are designed to ease the job of porting
applications from other vendors' Fortran dialects. For a summary list of all HP Fortran extensions, see the
HP Fortran Programmer's Reference. For information about porting other vendors’ Fortran programs to
HP Fortran, see “Porting to HP Fortran” on page 235.
This chapter discusses the following topics:
• Incompatibilities with HP FORTRAN 77
• Migration issues
• Approaches to migration