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

Compiling and linking

Compiling with the f90 command

Chapter 244

The common blocks listed in file (one per line, no enclosing ‘ / ‘s) are treated as

shared common blocks, but are not attached. The user must attach or otherwise allocate

storage for such common blocks before they are referenced.

A C language program would typically be used to either attach a shared memory

segment, or malloc a block of memory, and store that address into the external symbol

for the common block. All Fortran code that references such a common block will

indirect through the address in the external symbol for that indirect common block.

All source files that reference variables in such a common block must be compiled with

the +indirectcommonlist flag, and that common block name must appear in the

named file.

+io77

Suppresses the generation of the optional leading “0” before the decimal point for real

numbers printed with the E and F edit descriptors. Fortran 77 suppressed these leading

zeros unless the NOSTANDARDIO flag was used.

-ipo

This option is only valid for Itanium processor family architectures.

Enables interprocedural optimizations across files. Object files produced using this

option contain intermediate code in IELF format. At link time, ld automatically

invokes the interprocedural optimizer u2comp if any of the input object files is an IELF

file. This option is ignored at optimization levels +O1 and +O2. It is enabled by default

when +O4 or +Ofaster are used.

+k generates code for programs that reference a very large number of shared data items.

The linker will issue a diagnostic message in the rare case when this option is needed.

By default, the compiler generates short-displacement code sequences for programs that

reference global data in shared libraries. For nearly all programs, this is sufficient.

NOTE +k option is not valid on HP Itanium-based systems.

-K

Use static storage for locals instead of stack storage. This option is deprecated and

replaced by the +save option.

-Ldirectory