HP Fortran Programmer's Guide (March 2010)

Migrating to HP Fortran
Chapter 10228
to be changed to compile and execute correctly under 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