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.. _building-open-mpi-downloading-label:
Downloading Open MPI
====================
Open MPI is generally available two ways:
#. As source code.
* The best place to get an official Open MPI source code
distribution is from `the main Open MPI web site
<https://www.open-mpi.org/>`_.
* Downstream Open MPI packagers (e.g., Linux distributions)
sometimes also provide source code distributions. They may
include additional patches or modifications.
Consult your favorite downstream packager for more details.
.. caution:: Do **not** download an Open MPI source code tarball
from GitHub.com. The tarballs automatically generated
by GitHub.com are incomplete and will not build
properly.
GitHub.com-generated tarballs are **not** official Open
MPI releases.
#. As binary packages.
* The Open MPI community does not provide binary packages on `the
main Open MPI web site <https://www.open-mpi.org/>`_.
* Various downstream packagers (e.g., Linux distributions,
Homebrew, MacPorts, etc.) *do* provide pre-built, binary packages
for Open MPI.
Consult your favorite downstream packager for more details.
The majority of the rest of this section deals with installing Open
MPI from source.
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