Enables the parallelizer to generate multi-threaded code based on OpenMP* directives.
Linux and macOS: | -qopenmp -qno-openmp |
Windows: | /Qopenmp /Qopenmp- |
None
-qno-openmp or /Qopenmp- |
No OpenMP* multi-threaded code is generated by the compiler. |
This option enables the parallelizer to generate multi-threaded code based on OpenMP* directives. The code can be executed in parallel on both uniprocessor and multiprocessor systems.
This option works with any optimization level. Specifying no optimization (-O0 on Linux* or /Od on Windows*) helps to debug OpenMP applications.
On macOS* systems, when you enable OpenMP* API, you must also set the DYLD_LIBRARY_PATH environment variable within Xcode* or an error will be displayed.
Options that use OpenMP* API are available for both Intel® microprocessors and non-Intel microprocessors, but these options may perform additional optimizations on Intel® microprocessors than they perform on non-Intel microprocessors. The list of major, user-visible OpenMP constructs and features that may perform differently on Intel® microprocessors versus non-Intel microprocessors include: locks (internal and user visible), the SINGLE construct, barriers (explicit and implicit), parallel loop scheduling, reductions, memory allocation, thread affinity, and binding.
Product and Performance Information |
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Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex. Notice revision #20201201 |
Visual Studio: Language > OpenMP* Support
Eclipse: Language > Process OpenMP Directives
Xcode: Language > Process OpenMP Directives
Linux and macOS*: -fopenmp
Windows: /openmp