OPAL\_WRAPPER(1) Open MPI OPAL\_WRAPPER(1)

opal\_wrapper — Back-end Open MPI wrapper command

# [DESCRIPTION](#DESCRIPTION)

**opal\_wrapper** is not meant to be called directly by end users. It is automatically invoked as the back-end by the Open MPI wrapper commands such as: **mpicc**, **mpicxx**, and **mpifort** (and its legacy/deprecated aliases **mpif77** and **mpif90**).

Some Open MPI installations may have additional wrapper commands, and/or have renamed the wrapper compilers listed above to avoid executable name conflicts with other MPI implementations. Hence, you may also have wrapper compilers installed including the following names: **mpifort.openmpi** (and the legacy/deprecated aliases **mpif90.openmpi** and **mpif77.openmpi**), **mpicxx.openmpi**, **mpicc.openmpi**.

**See also:**

The following may exist depending on your particular Open MPI installation: [mpicc(1)](/man/enterprise-packages/openmpi-cuda-12.9/mpicc.1) <#man1-mpicc>, [mpicxx(1)](/man/enterprise-packages/openmpi-cuda-12.9/mpicxx.1) <#man1-mpicxx>, [mpifort(1)](/man/enterprise-packages/openmpi-cuda-12.9/mpifort.1) <#man1-mpifort>

# [Copyright](#Copyright)

2003-2026, The Open MPI Community

November 1, 2026

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Document: opal_wrapper(1) from openmpi-cuda-12.9 5.0.11-r1 (Chainguard OS)
Source: https://github.com/open-mpi/ompi