# 18.1.5. opal_wrapper

opal_wrapper — Back-end Open MPI wrapper command

## 18.1.5.1. 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), mpicxx(1), mpifort(1)