HP aC++/HP C A.06.25 Programmer's Guide

It is recommended that you use the -N option when linking OpenMP programs to

avoid exhausting memory when running with large numbers of threads.

NOTE: HP aC++ version A.06.00 does not support C++ constructs in OpenMP. Use

the +legacy_v5 option to use this option.

+opts

+opts filename

The file indicated by filename contains a list of options that are processed as if they

had been specified on the command line at the point of the +opts option. The options

must be delimited by a blank character. You can add comments to the option file by

using a "#" character in the first column of a line. The "#" causes the entire line to be

ignored by the compiler.

Example:

$ aCC +opts GNUOptions foo.c

Where GNUOptions contains:

#This file contains the set of options for programs needing GNU support -Ag++ -Wc,--fshort-enums

+O[no]parminit

The +O[no]parminit option enables [disables] automatic initialization to non-NaT

of unspecified function parameters at call sites. This is useful in preventing NaT values

in parameter registers. The default is +Onoparminit.

+O[no]parmsoverlap

The +Onoparmsoverlap option optimizes with the assumption that on entry to a

function each of that function’s pointer-typed formals points to memory that is accessed

only through that formal or through copies of that formal made within the function.

For example, that memory must not be accessed through a different formal, and that

formal must not point to a global that is accessed by name within the function or any

of its calls.

Use +Onoparmsoverlap if C/C++ programs have been literally translated from

FORTRAN programs.

The default is +Oparmsoverlap.

+O[no]procelim

The +O[no]procelim option enables [disables] the elimination of dead procedure

code and sometimes the unreferenced data.

Code Optimizing Options 83