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.. _platform-notes-section-label:
Platform Notes
==============
.. error:: **TODO We should have a canonical list of:**
* *required* 3rd-party package versions supported (PRRTE, hwloc,
libevent)
* back-end run-time systems supported (behind PRRTE)
* OS's and compilers supported
* network interconnects supported.
Open MPI uses both `OpenPMIx <https://openpmix.github.io/>`_ and
`PRRTE <https://github.com/openpmix/prrte>`_ for its run-time system support,
and therefore supports whatever run-time systems they support.
.. note:: See the :ref:`PMIx and PRRTE section
<label-running-role-of-pmix-and-prte>` of the Open MPI
documentation for more details about those projects and
their relationship to Open MPI.
Each version of Open MPI supports a specific set of versions of
OpenPMIx and PRRTE. Those versions therefore determine which run-time systems
that a release of Open MPI supports.
* Systems that have been tested are:
* Linux (various flavors/distros), 64 bit (x86, ppc, aarch64),
with gcc (>=4.8.x+), clang (>=3.6.0), Absoft (fortran), Intel,
and Portland (be sure to also see :ref:`the Compiler Notes
section <compiler-notes-section-label>`)
* macOS (10.14-10.15, 11.x, 12.x), 64 bit (x86_64) with XCode
compilers
* Other systems have been lightly (but not fully) tested:
* Cygwin 64 bit with gcc
* ARMv6, ARMv7, ARMv9
* Other 64 bit platforms.
* OpenBSD. Requires configure options ``--enable-mca-no-build=patcher``
and ``--disable-dlopen`` with this release.
* Problems have been reported when building Open MPI on FreeBSD 11.1
using the clang-4.0 system compiler. A workaround is to build
Open MPI using the GNU compiler.
.. note:: 32-bit environments are no longer supported.
* The run-time systems that are currently supported are:
* ssh / rsh
* PBS Pro, Torque
* Platform LSF (tested with v9.1.1 and later)
* Slurm
* Cray XE, XC, and XK
* Oracle Grid Engine (OGE) 6.1, 6.2 and open source Grid Engine
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