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 and as of 4.4 it implements version 3.0 of the OpenMP specification. The OpenMP 3.1 specification is supported since GCC 4.7. GCC 4.9 supports OpenMP 4.0 with the follow exceptions (as of 2013-10-11): The new directives are not support in Fortran, omp target will always run on the host and omp declare simd will run as non-SIMD version.

OpenMP Documentation

Automatic Parallelization


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.