6.6.6 Options for Controlling Optimization

The following options control compiler optimizations. See also Optimizations.

Table 6-4. General Optimization Options
Option	License	Summary
`-O0`	All	No optimizations (default)
`-O1`, `-O`	All	Optimization level 1
`-O2`	All	Optimization level 2
`-O3`	PRO	Optimization level 3
`-Os`	PRO	Optimization level s

Other optimization options are:

Options For Specific Optimization Control

Options that Specify Machine-Independent Flags