HP aC++/HP C A.06.20 Programmer's Guide

The default is +Onoconservative.

+O[no]limit

The +Olimit option enables optimizations that significantly increase compile time or

that consume a lot of memory.

The +Onolimit option suppresses optimizations regardless of their effect on compile

time or memory consumption.

Use +Onolimit at all optimization levels.

Usage:

+O[no]limit=level

The defined values of level are:

default

Based on tuning heuristics, the optimizer will spend a reasonable amount

of time processing large procedures. This is the default option.

min

For large procedures, the optimizer will avoid non-linear time

optimizations. This option is a synonym for +Olimit.

none

The optimizer will fully optimize large procedures, possibly resulting in

significantly increased compile time. This option is a synonym for

+Onolimit.

Example:

To remove optimization time restrictions at O2, O3, or O4 optimization levels, use

+Onolimit as follows:

aCC <opt level> +Onolimit sourcefile.C

+O[no]ptrs_ansi

The default is +Onoptrs_ansi.

+Optrs_ansi is synonymous to +Otype_safety=ansi.

+Onoptrs_ansi is synonymous to +Otype_safety=off.

NOTE: This option is supported in C-mode only. A warning is displayed in C++ when

this option is used.

+O[no]ptrs_strongly_typed

The default is +Onoptrs_strongly_typed.

+Optrs_strongly_typed is synonymous to +Otype_safety=strong.

72 Command-Line Options