HP Fortran Programmer's Guide (September 2007)

Compiling and linking

Compiling with the f90 command

Chapter 2 57

The ﬁle indicated by

filename

contains a list of symbols, separated by

spaces or newlines. These symbols are assigned the default export class.

-Bextern [=

symbol

...]]

The named symbols, or all undeﬁned symbols if no list is provided, are

assigned the default export class. Additionally, the compiler will inline the

import stub for calls to these symbols. No compile-time binding of these

symbols will be done. All references to these symbols will be through the

linkage table, so an unnecessary performance penalty will occur if -Bextern

is applied to a listed symbol that is resolved in the same load module.

-Bextern:

filename

The ﬁle indicated by ﬁlename contains a list of symbols, separated by spaces

or newlines. These symbols are assigned the default export class.

Additionally, the compiler will inline the import stub for calls to these

symbols. No compile-time binding of these symbols will be done. All

references to these symbols will be through the linkage table, so an

unnecessary performance penalty will occur if -Bextern is applied to a

symbol that is resolved in the same load module.

-Bhidden [=

symbol

...]]

The named symbols, or all symbols if no symbols are speciﬁed, are assigned

the hidden export class. The hidden export class is similar to the protected

export class. These symbols will not be preempted by symbols from other

load modules, so the compiler may bypass the linkage table for both code

and data references and bind them to locally-deﬁned code and data symbols.

In addition, hidden symbols will not be exported outside the current load

module. The linker may eliminate them from a shared library, but in an

executable, they remain accessible to the debugger unless +Oprocelim is

also speciﬁed.

When used with no symbol list, -Bhidden implies -W1,-aarchive_shared,

causing the linker to prefer an archive library over a shared library if one is

available. This can be overriden by following the -Bhidden option with a

subsequent -W1,-a option.

-Bhidden:

filename