HP Fortran Programmer's Guide (September 2007)

Compiling and linking

Compiling with the f90 command

Chapter 2 39

+hugecommon=name

where name is the name of a COMMON block. By default, only COMMON

blocks larger than 2 gigabytes are placed into huge data segments.

For example:

% f90 +hugecommon=results pcvals.f90

places the COMMON block named results into a huge data segment.

+hugecommon is especially useful when a program contains several different

COMMON blocks that together occupy more than two gigabytes but

individually occupy less than two gigabytes. In this situation, the largest

COMMON blocks could be placed in a huge data segment when the program

is compiled by specifying their names in multiple +hugecommon options.

If a common block is speciﬁed as huge in one object ﬁle, it must be speciﬁed

huge in all object ﬁles. If it is not, the program will fail to link.

NOTE PA2.0W objects cannot be combined with 32-bit object ﬁles.

64-bit applications will only execute on PA8000-based

systems.

+hugesize

+hugesize instructs the compiler to place COMMON blocks that are larger

than the speciﬁed size into a huge data segment. The format for this option

is:

+hugesize=n

where n is the size in kilobytes (1024 bytes).

The default is to place COMMON blocks larger than two gigabytes

(2147483648 bytes) into huge data segments; that is, +hugesize=2097152 is

the default.

For example:

% f90 +hugesize=1024 hello.f90

speciﬁes that COMMON blocks larger than 1048576 bytes (1 megabyte)

should be placed into a huge data segment.

If a common block is speciﬁed as huge in one object ﬁle, it must be speciﬁed

huge in all object ﬁles. If it is not, the program will fail to link.