Differences between revisions 43 and 44
Revision 43 as of 2020-11-15 09:05:43
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Editor: TobiasBurnus
Comment: Fix link, add OMP 5.1 link
Revision 44 as of 2021-05-03 10:34:57
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Editor: TobiasBurnus
Comment: Add link for changes in GCC 12
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 * [[https://gcc.gnu.org/gcc-11/changes.html|GCC 11 Changes]] – work in progress (as of 2020)  * [[https://gcc.gnu.org/gcc-12/changes.html|GCC 12 Changes]] – work in progress (as of 2021)
 * [[https://gcc.gnu.org/gcc-11/changes.html|GCC 11 Changes]]


This page contains information on GCC's implementation of the OpenMP specification and related functionality like the auto parallelizer (-ftree-parallelize-loops).

As of GCC 4.2, the compiler implements version 2.5 of the OpenMP specification, as of 4.4 it implements version 3.0 and since GCC 4.7 it supports the OpenMP 3.1 specification. GCC 4.9 supports OpenMP 4.0 for C/C++, GCC 4.9.1 also for Fortran. GCC 5 adds support for Offloading. OpenMP 4.5 is supported for C/C++ since GCC 6 and since GCC 7 for Fortran (with omissions, largest missing item is structure element mapping). Since GCC 9, there is initial OpenMP 5 support (essentially C/C++, only). GCC 10 added some more features, mainly for C/C++ but also for Fortran.

GCC 11 (ongoing development) extended the Fortran compiler to fully support OpenMP 4.5 and support more OpenMP 5.0; additionally, nonrectangular loops are now supported.

Release Notes

OpenMP Documentation

Automatic Parallelization


  • Streamization

Test Suites and Benchmarks



Feel free to add new items to this list as you run into issues or features that would be interesting to add. Send mail to the list and/or the GCC OpenMP maintainers if any item in this list sounds interesting but is hard to understand.

None: openmp (last edited 2021-10-06 21:04:21 by TobiasBurnus)