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

Displaying Optimization Information

The +O[no]info option displays informational messages about the optimization

process.

+O[no]info

The +O[no]info option displays messages about the optimization process. This option

may be helpful in understanding what optimizations are occurring. You can use the

option at levels 0-4.

The default is +Onoinfo at levels 0-4.

Parallel Processing Options

HP aC++ provides the following optimization options for parallel code.

-mt

The -mt option enables multi-threading capability without the need to set any other

flags, such as -l and -D. HP aC++ examines your environment and automatically

selects and sets the appropriate flags. “Performance Options” (page 217).

There are three possible sets of flags depending on your operating system and the

libstd you use. Table 2-4 lists the option matrix for -mt.

Parallel Processing Options 87