Limiting the Size of Optimized Code

You can disable optimizations that expand code size at the second, third, and fourth optimization levels by using the +Osize option, 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.