..
  Copyright 1988-2022 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the copyright.rst file.

.. _environment-variables:

OpenMP Environment Variables
----------------------------

The environment variables which beginning with :envvar:`OMP_` are defined by
section 4 of the OpenMP specification in version 4.5, while those
beginning with :envvar:`GOMP_` are GNU extensions.

.. toctree::
  :maxdepth: 2

  openmp-environment-variables/ompcancellation
  openmp-environment-variables/ompdisplayenv
  openmp-environment-variables/ompdefaultdevice
  openmp-environment-variables/ompdynamic
  openmp-environment-variables/ompmaxactivelevels
  openmp-environment-variables/ompmaxtaskpriority
  openmp-environment-variables/ompnested
  openmp-environment-variables/ompnumteams
  openmp-environment-variables/ompnumthreads
  openmp-environment-variables/ompprocbind
  openmp-environment-variables/ompplaces
  openmp-environment-variables/ompstacksize
  openmp-environment-variables/ompschedule
  openmp-environment-variables/omptargetoffload
  openmp-environment-variables/ompteamsthreadlimit
  openmp-environment-variables/ompthreadlimit
  openmp-environment-variables/ompwaitpolicy
  openmp-environment-variables/gompcpuaffinity
  openmp-environment-variables/gompdebug
  openmp-environment-variables/gompstacksize
  openmp-environment-variables/gompspincount
  openmp-environment-variables/gomprtemsthreadpools