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

Migrating to HP Fortran
Approaches to migration
Chapter 10 235
specifier in OPEN statement: Minor
differences exist between F90 and F77
IOSTAT error numbers
The incompatibilities currently detected by fid are:
• The I/O specifiers to the OPEN statement listed in “Input/output” on page 224.
• The HP FORTRAN 77 forms of ON EXTERNAL and ON INTERNAL.
• LOGICAL types used as operands to the .EQ. and .NE. operators.
• All HP FORTRAN 77 compiler directives except those listed in “Directives” on page 225.
• Command-line options that are not supported (see “f77 options not supported by f90” on page 221) or
that have been replaced by f90 options (see Table on page 221).
NOTE fid's list of incompatibilities will be periodically updated. For more information about the
fid command, see the fid(1) man page.