B.2.69 -xautopar

This option does not accept OpenMP parallelization directives. The Sun-specific MP pragmas have been deprecated and are no longer supported. See the Sun Studio 12: OpenMP API User’s Guide for migration information to the directives of the standard.

(SPARC) Turns on automatic parallelization for multiple processors. Does dependence analysis (analyze loops for inter-iteration data dependence) and loop restructuring. If optimization is not at-xO3 or higher, optimization is raised to-xO3 and a warning is emitted.

Avoid-xautopar if you do your own thread management.

To achieve faster execution, this option requires a multiple processor system. On a single-processor system, the resulting binary usually runs slower.

To run a parallelized program in a multithreaded environment, you must set the OMP_NUM_THREADS environment variable prior to execution. See the Sun Studio 12: OpenMP API User’s Guide for more information.

If you use-xautopar and compile and link in one step, then linking automatically includes the microtasking library and the threads-safe C runtime library. If you use-xautopar and compile and link in separate steps, then you must also link with-xautopar. For a complete list of all compiler options that must be specified at both compile time and at link time, see Table A–2.