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

The +Ofaster option is equivalent to +Ofast with an increased optimization level.
The definition of +Ofaster may change, or the option may be deprecated in future
releases.
+[no]srcpos
+[no]srcpos
The +[no]srcpos option controls the generation of source position information for
HP Caliper. The default is +srcpos.
When +srcpos, is in effect, the compiler generates source position information. When
+nosrcpos is in effect, the compiler does not generate this information and the compiler
instructs the linker to discard any of this information found in the object files.
+DSmodel
+DSmodel
The +DSmodel option performs instruction scheduling for a particular implementation
of the Itanium®-based architecture. The default is blended.
model can be either of the following four values.
blended
Tune to run reasonably well on multiple implementations. As old
implementation become less important and new implementations are
added, the behavior with this value will change accordingly.
itanium
Tune for the Itanium® processor.
itanium2
Tune for the Itanium2® processor.
native
Tune for the processor on which the compiler is running.
Porting Options
Use the following options as necessary when porting your code from other operating
environments to HP-UX.
-fast
-fast
The -fast option selects a combination of optimization options for optimum execution
speed and reasonable build times. Currently chosen options are:
• +O2
• +Olibcalls
• +Ofltacc=relaxed
• +Onolimit
• +DSnative
• +FPD
94 Command-Line Options