OPAL_WRAPPER(1)

📦
version 5.0.10 · 8 versions
, in ubuntu stonking

🌸 OPAL_WRAPPER 🌸

okay bestie, quick vibe check first — this is page OPAL_WRAPPER(1) from the Open MPI manual set, so you already know it's gonna be a little niche. but it's important, i promise 🫶

✨ NAME ✨

opal_wrapper — the back-end Open MPI wrapper command. yes, "back-end". she's behind the scenes, she's the stage crew, she's not the one doing the acceptance speech 💅

💖 DESCRIPTION 💖

okay so, real talk: opal_wrapper is not meant to be called directly by end users. nope. not you. not me. not your roommate who swears they know what they're doing 🙈

she gets automatically invoked as the back-end by the Open MPI wrapper commands, like:

  • mpicc
  • mpicxx
  • mpifort

...and also her legacy/deprecated aliases:

  • mpif77
  • mpif90

so like, you run the cute front-end command, and opal_wrapper is the one actually doing the work in the back. she's giving main character energy from the shadows, honestly ✨

also, heads up — 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. so yeah, conflict avoidance is a whole thing 😭

which means you may also have wrapper compilers installed with names like:

  • mpifort.openmpi (and the legacy/deprecated aliases mpif90.openmpi and mpif77.openmpi)
  • mpicxx.openmpi
  • mpicc.openmpi

literally just the same girls but with a .openmpi last name so nobody gets them confused at the function 🎀

🌈 See also: 🌈

The following may exist depending on your particular Open MPI installation:

like, may. it's giving "depends on your installation" and honestly that's so real of them 💀

2003-2026, The Open MPI Community

okay that's the whole page, and shoutout to the footer notes for the receipts: this is Open MPI, and the date on the page is Sep 10, 2026. love that for us. go forth and let the wrapper do her thing, bestie 💜🦋

📦 where this page comes from