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.. _label-building-pmix-cli-options-required-support-libraries:
CLI Options for required support libraries
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The following ``configure`` command line options are for PMIx's
:ref:`required support libraries
<label-install-required-support-libraries>`
* ``--with-hwloc[=VALUE]``:
* ``--with-libevent[=VALUE]``:
* ``--with-libev[=VALUE]``:
These options specify where to find
the headers and libraries for the `Hwloc
<https://www.open-mpi.org/projects/hwloc/>`_, `Libevent
<https://libevent.org/>`_, and `libev <https://metacpan.org/dist/EV/view/libev/ev.pod/>`_ libraries,
respectively.
.. note:: Either ``libevent`` *or* ``libev`` must be provided.
PMIx's ``configure`` script will error out if both
are specified. In the absence of user direction,
PMIx will default to using ``libevent``.
The following ``VALUE``\s are permitted:
* ``DIR``: Specify the location of a specific installation to use.
``configure`` will abort if it cannot find suitable header files
and libraries under ``DIR``.
* ``--with-hwloc-libdir=LIBDIR``:
* ``--with-libevent-libdir=LIBDIR``:
* ``--with-libev-libdir=LIBDIR``:
:ref:`See the configure CLI
options conventions <building-pmix-cli-options-conventions-label>`
for a description of these options.
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