Parallel Programming Guide for HP-UX Systems
Glossary 205
Glossary
A-B
archive library A library of routines that
can be linked to an executable program at
link-time. The names of archive libraries
have the .a extension. See also shared
library..
aliasing Referencing a variable by more
than one name. Examples of aliasing
include:
• Passing the same variable as two or
more actual arguments.
• Using the EQUIVALENCE statement.
• Referencing an element of an array
declared in common with an
out-of-bounds subscript.
• Passing a common variable as an actual
argument.
In general, aliasing inhibits optimization.
alignment The positioning of data within
memory. Except for objects larger than 8
bytes, HP Fortran 90 aligns data on a byte
boundary that is a multiple of its size.
Objects larger than 8 bytes are aligned on
8-byte boundaries.
automatic variable A variable that is
allocated on the stack. By default, program
variables in HP Fortran 90 are automatic.
Two characteristics of automatic variables
are of note:
• They are allocated at each invocation of
the procedure in which they are declared
and deallocated upon return from the
procedure. This means that automatic
variables do not retain their value
between invocations.
• They must be explicitly initialized.
See also static variable..
back-end The component of the compiler
that optimizes and generates object code.
See also front-end..
Basic Linear Algebra Subroutine
library A library of de facto standard
routines for performing low-level vector and
matrix operations. To access routines in this
library, you must compile with the -lblas
option.
BLAS See Basic Linear Algebra
Subroutine library.
BOZ constant An integer constant that is
used as an initializer in a DATA statement
and is formatted in binary (B), octal (O), or
hexadecimal (Z) notation.
buffering, tty See tty buffering.
built-in functions The two HP Fortran 90
extensions, %VAL and %REF. %VAL forces an
argument to be passed by value, and %REF
forces it to be passed by reference.
C-D
cpp See C preprocessor.
C preprocessor A C language utility that
removes or adds statements in a program
source text, in accordance with directives
that have been inserted in the source file.