HP Fortran Programmer's Guide (September 2007)

Compiling and linking
Compiling with the f90 command
Chapter 2 31
-D defines a symbol name ( name ) to the C preprocessor. If you do not
provide a definition ( def ) for the symbol name, name is defined as 1. This
option applies only to files that are passed to the C preprocessor.
+DA model
+DA generates object code for a particular version of the PA-RISC
architecture. By default, the compiler generates code for the machine model
you are compiling on. With this option, you can override the default,
causing the compiler to generate code for the machine on which the program
will execute rather than for the machine on which it is compiled.
model can be one of the following:
• A PA-RISC version number (1.1 or 2.0)
• A model number (for example, 750 or 870)
• One of the PA-RISC processor names (for example, PA7000, PA7100, or
PA8000)
• The word portable, which causes the compiler to generate code that is
compatible across all PA-RISC 1.1 and 2.0 systems
For best performance, use +DA with the model number or architecture of the
machine on which you plan to execute the program.
The +DA option also specifies the appropriate search path for HP-UX math
libraries. If your program calls mathematical functions, +DA2.0 links in the
PA2.0 version of the math library, while +DA1.1 links in the PA1.1 library
version. (For more information about using math libraries, see the HP-UX
Floating-Point Guide.)
With +DA2.0W, memory addresses are 64-bit values. This allows common
blocks and dynamically allocated memory to exceed 32-bit address limits.
This feature is restricted by the available virtual memory on the system
where the application is run.
NOTE You must specify +DA2.OW to generate 64-bit code. At PA64,
all data types remain the same size as at PA32 except for
pointers. Fortran pointers are hidden from the user and
cannot be directly manipulated.
+DA2.0W