HP 3000 Manuals HP 3000 Manuals
Specifying Maximum Optimization on HP-UX
To get maximum optimization, use:
cc +Oall Performs maximum optimization.
Use +Oall with stable, well-structured, ANSI-conforming code. These
types of optimizations give you the fastest code, but are riskier than
the default optimizations.
You can use +Oall at optimization levels 2, 3, and 4. The default is
+Onoall.
The +Oall option by itself (specified without the +02, +03, or +04
options) combines the +O4 +Oaggressive +Onolimit options. This
combination performs aggressive optimizations with unrestricted compile
time at the highest level of optimization.