HP Fortran Programmer's Guide (B3908-90031; September 2011)

Performance and optimization
Using options to control optimization
Chapter 6 153
+O[no]dynopt All Enable [disable] dynamic optimization for the
output file, if the run-time environment supports
this feature. Both forms of this option change the
default setting, which allows the run-time
environment to enable or disable dynamic
optimization according to a system-wide default.
This option applies only to executable files and
shared libraries. chatr(1) can be used to
change this setting, including restoration of the
default setting, after the output file has been
created.
+O[no]entrysched All Perform [do not perform] instruction scheduling
on entry and exit code. The default is
+Onoentrysched.
NOTE: This option is valid only on the PA-RISC
systems.
+O[no]fastaccess All Enable [disable] fast access to global data. The
default is +Onofastaccess at levels 1, 2, and 3;
+Ofastaccess at level 4.
NOTE: This option is valid only on the PA-RISC
systems.
Table 6-3 Fine-tuning optimization options (Continued)
Option Level Function