A number of compilers and tools from various vendors or open source community initiatives implement the OpenMP API. If we are missing any please Contact Us with your suggestions.

Vendor/Source Compiler/Language Information
Absoft Pro Fortran Fortran Versions 11.1 and later of the Absoft Fortran 95 compiler for Linux, Windows and Mac OS X include integrated OpenMP 3.0 support. Version 18.0 supports OpenMP 3.1. Compile with -openmp. More information
ARM C/C++/Fortran
Available on Linux
C/C++ – Support for OpenMP 3.1 and all non-offloading features of OpenMP 4.0/4.5. Offloading features are under development. Fortran – Full support for OpenMP 3.1 and limited support for OpenMP 4.0/4.5. Compile and link your code with -fopenmp More information
Barcelona Supercomputing Center Mercurium


Mercurium is a source-to-source research compiler that is available to download at https://github.com/bsc-pm/mcxx. OpenMP 3.1 is almost fully supported for C, C++, Fortran. Apart from that, almost all tasking features introduced in newer versions of OpenMP are also supported. » More Information
Cray CCE


Cray Compiling Environment (CCE) 8.6 (June 2017) supports OpenMP 4.5 for C, C++ and Fortran. OpenMP is on by default.

Flang Flang


Fortran for LLVM. Substantially full OpenMP 4.5 on Linux/x86-64, Linux/ARM, Linux/OpenPOWER.

TARGET regions are mapped to the multicore host CPU as the target with PARALLEL and DISTRIBUTE loops parallelized across all OpenMP threads. Known limitations: SIMD and DECLARE SIMD have no effect on SIMD code generation; TASK DEPEND/PRIORITY, TASKLOOP FIRSTPRIVATE/LASTPRIVATE, DECLARE REDUCTION and the LINEAR/SCHEDULE/ORDERED(N) clauses on the LOOP construct are not supported.

Compile with -mp to enable OpenMP on all platforms.

»More information on Flang.



Free and open source – Linux, Solaris, AIX, MacOSX, Windows, FreeBSD, NetBSD, OpenBSD, DragonFly BSD, HPUX, RTEMS

From GCC 4.2.0, OpenMP 2.5 is fully supported for C/C++/Fortran.
From GCC 4.4.0, OpenMP 3.0 is fully supported for C/C++/Fortran.
From GCC 4.7.0, OpenMP 3.1 is fully supported for C/C++/Fortran.
In GCC 4.9.0, OpenMP 4.0 is supported for C and C++, but not Fortran.
From GCC 4.9.1, OpenMP 4.0 is fully supported for C/C++/Fortran.
From GCC 6.1, OpenMP 4.5 is fully supported for C and C++.
Compile with -fopenmp to enable OpenMP.
Online documentation: https://gcc.gnu.org/onlinedocs/libgomp/
OpenMP support history: https://gcc.gnu.org/projects/gomp/



XL C/C++ for Linux V13.1.5 and XL Fortran for Linux V15.1.5 support a subset of OpenMP 4.5 features that include the target constructs.
Compile with -qsmp=omp to enable OpenMP directives and with -qoffload for offloading the target regions to GPUs.
For more information, please visit IBM XL C/C++ for Linux and IBM XL Fortran for Linux.
Intel C/C++/Fortran Windows, Linux, and MacOSX.

OpenMP 3.1 C/C++/Fortran fully supported in version 12.0, 13.0, 14.0 compilers
OpenMP 4.0 C/C++/Fortran supported in version 15.0 and 16.0 compilers
OpenMP 4.5 C/C++/Fortran supported in version 17.0 compilers
OpenMP 4.5 C/C++/Fortran supported in version 18.0 compilers
Compile with -Qopenmp on Windows, or just -openmp or -qopenmp on Linux or Mac OSX

»More detailed information

Lahey/Fujitsu Fortran 95 C/C++/Fortran The compilers in the software package of ‘Technical Computing Suite for the PRIMEHPC FX100′ support OpenMP 3.1.

»More information

LLNL Rose Research Compiler C/C++/Fortran ROSE is a source-to-source research compiler supporting OpenMP 3.0 and some OpenMP 4.0 accelerator features targeting NVIDIA GPUs.
» More information
LLVM Clang


Clang is an open-source (permissively licensed) C / C++ compiler that is available to download at http://llvm.org/releases/download.html. Since Clang 3.9 and later support all non-offloading features of OpenMP 4.5. Offloading support is under development and is expected to become available in a future version.

Compile and link your code with -fopenmp

NAG Nagfor


NAG Fortran Compiler 6.1 supports OpenMP 3.1 on x86 and x64, for Linux, Mac and Windows. Compile with –openmp.
» More Information
OpenUH Research Compiler C/C++/Fortran The OpenUH 3.x compiler has a full open-source implementation of OpenMP 2.5 and near-complete support for OpenMP 3.0 (including explicit task constructs) on Linux 32-bit or 64-bit platforms. For more information or to download: https://github.com/uhhpctools/openuh
Oracle C/C++/Fortran Oracle Developer Studio 12.5 compilers (C, C++, and Fortran) support OpenMP 4.0 features.
More information at http://www.oracle.com/technetwork/server-storage/developerstudio/overview/index.html
Compile with -xopenmp. Use -xvpara for static correctness checking and -xloopinfo for loop level messages.
Use the er_src tool to get more detailed information.
PGI C/C++/Fortran Support for substantially full OpenMP 4.5 in Fortran/C/C++ on Linux/x86-64 and Linux/OpenPOWER. TARGET regions are implemented with default support for the multicore host as the target, and PARALLEL and DISTRIBUTE loops are parallelized across all OpenMP threads. Known limitations: SIMD and DECLARE SIMD have no effect on SIMD code generation; TASKLOOP, TASK DEPEND/PRIORITY, DECLARE REDUCTION and the LINEAR/SCHEDULE/ORDERED(N) clauses on the LOOP construct are not supported.

Support for full OpenMP 3.1 in Fortran/C/C++ on MacOS/x86-64, and in Fortran/C on Windows/x86-64. Compile with -mp to enable OpenMP on all platforms.

»More information on PGI compilers.

Texas Instruments C The TI cl6x compiler v8.x supports OpenMP 3.0 for multicore C66x on TI’s Keystone I family of Multicore C667x/C665x Digital Signal Processor (DSP) SoCs using the Processor-SDK-RTOS.

The Linaro toolchain (gcc) 6.2.1 supports OpenMP 4.5 for multicore Cortex-A15 on TI’s AM572x and Keystone II family (K2H/K2K, K2E, K2L, K2G) SoCs using the Processor-SDK-Linux.

The TI clacc v1.x compiler supports OpenMP 3.0 and device constructs from OpenMP 4.0 heterogeneous multicore Cortex-A15+C66x-DSP on TI’s AM572x and Keystone II family (K2H/K2K, K2E, K2L, K2G) SoCs using both the Processor-SDK-Linux (A15) and Processor-SDK-RTOS (C66x).

See here for the latest versions of the Processor-SDKs for various TI SoCs: http://processors.wiki.ti.com/index.php/Processor_SDK_Supported_Platforms_and_Versions

Tool Vendor/Source Information
Arm Forge Arm Arm Forge brings everything you need to build reliable and optimized code that works and creates the right results on multiple High Performance Computing (HPC) architectures. The suite allows you to debug, profile and tune for optimal performance – on everything from single threads through to complex parallel HPC and scientific codes. The updated tool supports everything from the latest compliers and C++ 11 standards to Intel, 64-bit Arm, and OpenPOWER hardware and includes Arm DDT (debugging) and Arm MAP (profiling). More Information.

Arm DDT is a powerful, easy-to-use graphical debugger. It includes static analysis that highlights potential problems in the source code, integrated memory debugging that can catch reads and writes outside of array bounds, integration with MPI message queues and much more. It provides a complete solution for finding and fixing problems whether on a single thread or thousands of threads. Debug with Arm DDT

Arm MAP is a parallel profiler that shows you which lines of code took the most time and why. It supports both interactive and batch modes for gathering profile data, and supports MPI, OpenMP and single-threaded programs. Syntax-highlighted source code with performance annotations, enable you to drill down to the performance of a single line, and has a rich set of zero-configuration metrics, showing memory usage, floating-point calculations and MPI usage across processes. Profile with Arm MAP

HPCToolkit RICE University HPCToolkit is an integrated suite of tools for measurement and analysis of program performance on computers ranging from multicore desktop systems to the nation’s largest supercomputers. HPCToolkit provides accurate measurements of a program’s work, resource consumption, and inefficiency, correlates these metrics with the program’s source code, works with multilingual, fully optimized binaries, has very low measurement overhead, and scales to large parallel systems. HPCToolkit’s measurements provide support for analyzing a program execution cost, inefficiency, and scaling characteristics both within and across nodes of a parallel system. More Information.
ParaFormance ParaFormance Technologies ParaFormance is a software tool-chain that allows software developers to quickly and easily write multi-core software. ParaFormance enables software developers to find the sources of parallelism within their code, automatically (through user-controlled guidance) inserting the parallel business logic (using OpenMP and TBB), and checking that the parallelised code is thread-safe. More information
Paraver BSC Paraver is a flexible performance analysis tool developed to respond to the need to have a qualitative global perception of the application behavior by visual inspection and then to be able to focus on the detailed quantitative analysis of the problems. Expressive power, flexibility and the capability of efficiently handling large traces are key features addressed in the design of Paraver. The clear and modular structure of Paraver plays a significant role towards achieving these targets. More Information.
Parallware C/C++ Appentra Solutions The Parallware tools include the Parallware Trainer, an interactive, real-time desktop tool that facilitates teaching, learning, and the usage of parallel programming using directives of OpenMP 4.5. More Information

Reveal CRAY Reveal is Cray’s performance analysis and code optimization tool that combinines run time performance statistics and program source code visualization with Cray Compiling Environment (CCE) compile-time optimization feedback. Reveal supports source code navigation using whole-program analysis data provided by the Cray Compiling Environment, coupled with performance data collected during program execution by the Cray performance tools, to understand which high-level serial loops could benefit from improved parallelism.

Scalasca Trace Tools Juelich Supercomputing Centre The Scalasca Trace Tools are a collection of trace-based performance analysis tools that have been specifically designed for use on large-scale systems. A distinctive feature is the scalable automatic trace-analysis component which provides the ability to identify wait states that occur, e.g., as a result of unevenly distributed workloads. Besides merely identifying wait states, the trace analyzer is also able to pinpoint their root causes and to identify the activities on the critical path of the target application, highlighting those routines which determine the length of the program execution and therefore constitute the best candidates for optimization. The Scalasca Trace Tools process traces generated by the Score-P measurement infrastructure and produce reports that can be explored with Cube or TAU ParaProf/PerfExplorer. More information
Score-P Score-P Developer Community The Score-P measurement infrastructure is an extremely scalable and easy-to-use tool suite for call-path profiling, event tracing, and online analysis of applications written in C, C++, or Fortran. It supports a wide range of HPC platforms and programming models; besides OpenMP, Score-P can hook into other common models, including MPI, SHMEM, Pthreads, CUDA, OpenCL, OpenACC, and their valid combinations. Score-P is capable of gathering performance information through automatic instrumentation of functions, library interception/wrapping, source-to-source instrumentation, event- and interrupt-based sampling, and hardware performance counters. Score-P measurements are the primary input for a range of specialized analysis tools, such as: Cube, Vampir, Scalasca Trace Tools, TAU, or Periscope. More information.
TAU University of Oregon TAU is a performance evaluation tool that supports both profiling and tracing for programs written in C, C++, Fortran, Java, Python, and Spark. For instrumentation of OpenMP programs, TAU includes source-level instrumentation (Opari), a runtime “collector” API (called ORA) built into an OpenMP compiler (OpenUH), a wrapped OpenMP runtime library (GOMP using ORA), and an OpenMP runtime library supporting an OMPT prototype (Intel/LLVM). View technical paper. TAU supports both direct probe based measurements as well as event-based sampling modes for profiling. For tracing, TAU provides an open-source trace visualizer (Jumpshot) and can generate native OTF2 trace files that may be visualized in the Vampir trace visualizer. TAU Commander simplifies the TAU workflow and installation. TAU supports both PAPI and LIKWID toolkits to access low-level processor specific hardware performance counter data to correlate it to the OpenMP code regions. More Information.
TotalView for HPC RogueWave With TotalView for HPC, simultaneous debug many processes and threads in a single window to get complete control over program execution: Running, stepping, and halting line-by-line through code within a single thread or arbitrary groups of processes or threads. Work backwards from failure through reverse debugging, isolating the root cause faster by eliminating repeated restarts of the application. Reproduce difficult problems that occur in concurrent programs that use threads, OpenMP. More Information.
Vampir Technische Universität Dresden Vampir provides an easy-to-use framework that enables developers to quickly display and analyze arbitrary program behavior at any level of detail. The tool suite implements optimized event analysis algorithms and customizable displays that enable fast and interactive rendering of very complex performance monitoring data. Score-P is the primary code instrumentation and run-time measurement framework for Vampir and supports various instrumentation methods, including instrumentation at source level and at compile/link time. More Information.

VTune Amplifier XE Intel Whether you’re tuning for the first time or doing advanced performance optimization, Intel VTune Amplifier provides accurate profiling data―collected with very low overhead. But good data isn’t enough. Intel VTune Amplifier gives you the tools to mine it and interpret it. Quickly turn raw profiling data into performance insight using the graphical interface to sort, filter, and visualize data from a local or remote target. Or use the command line interface to automate analysis. More Information.