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.. _label-building-ompi-cli-options-required-support-libraries:
CLI Options for required support libraries
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The following ``configure`` command line options are for Open MPI's
:ref:`required support libraries
<label-install-required-support-libraries>`
* ``--with-hwloc[=VALUE]``:
* ``--with-libevent[=VALUE]``:
* ``--with-pmix[=VALUE]``:
* ``--with-prrte[=VALUE]``: These four options specify where to find
the headers and libraries for the `Hwloc
<https://www.open-mpi.org/projects/hwloc/>`_, `Libevent
<https://libevent.org/>`_, `PMIx <https://openpmix.github.io/>`_,
and `PRRTE <https://github.com/openpmix/prrte>`_ libraries,
respectively. The following ``VALUE``\s are permitted:
* ``external``: Use an external installation (rely on default
compiler and linker paths to find it). ``configure`` will abort
if it cannot find suitable header files and libraries.
* ``internal``: Use Open MPI's internal/bundled copy.
* No value specified: Try the ``external`` behavior. If that fails,
fall back to ``internal`` behavior. *This is the default behavior.*
* ``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-prrte-libdir=LIBDIR``:
* ``--with-pmix-libdir=LIBDIR``:
:ref:`See the configure CLI
options conventions <building-ompi-cli-options-conventions-label>`
for a description of these four options.
* ``--with-valgrind[=DIR]``:
Directory where the valgrind software is installed. If Open MPI
finds Valgrind's header files, it will include additional support
for Valgrind's memory-checking debugger.
Valgrind support is disabled by default in Open MPI. Enabling
Valgrind support will eliminate a lot of false positives when
running Valgrind on MPI applications. There is a minor performance
penalty for enabling this option.
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