HP 3000 Manuals

HP C Programmer's Guide

Limiting the Size of Optimized Code on HP-UX 

You can disable optimizations that expand code size at the second, third,
and fourth optimization levels by using the +Osize suboption, as follows:

     cc +O2 +Osize sourcefile.c 

or:

     cc +O3 +Osize sourcefile.c 

or:

     cc +O4 +Osize sourcefile.c 

Most optimizations improve execution speed and decrease executable code
size.  A few optimizations significantly increase code size to gain
execution speed.  The +Osize option disables these code-expanding
optimizations.

Use this option if you have limited main memory, swap space, or disk
space.

MPE/iX 5.0 Documentation