How to show the version of OpenMPI from "mpifort" etc.

[cponder]

I built OpenMPI 5.0.7 using the NVHPC 25;1 compilers.
When I run these commands

--> mpifort -V
nvfortran 25.1-0 64-bit target on x86-64 Linux -tp sapphirerapids 
NVIDIA Compilers and Tools
Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
cponder@viking-prod-297: /usr/local/bin/mpifort -version
nvfortran-Warning-Unknown switch: -version
nvfortran-Warning-No files to process

--> mpifort --version
nvfortran 25.1-0 64-bit target on x86-64 Linux -tp sapphirerapids 
NVIDIA Compilers and Tools
Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.

--> mpifort -dumpfullversion
25.1

they just show me the version of the underlying NVHPC compiler. though

mpirun --version
mpirun (Open MPI) 5.0.7

does give the right answer.

[cponder]

I hadn't considers this a problem back when I was building Modules, since my path to the executables would include the "5.0.1" as one of the directory-levels, so there was no question.
This comes up when I build containers, though, since I load everything into /usr/local/*. I want to make sure that somehow there wasn't a (for example) MPICH build thrown on top of it.

[ggouaillardet]

[EDIT]]
mpifort --showme:version does the trick.

(mpirun does not support the --showme:version as pointed by @rhc54)

[rhc54]

mpirun --showme:version does the trick.

Errr...no, that option isn't recognized. Just mpirun --version is what we support.

[ggouaillardet]

I beg to differ, this is done in the opal wrapper at

ompi/opal/tools/wrappers/opal_wrapper.c

Lines 767 to 775 in 5ae1b96

	} else if (0 == strncmp(user_argv[i], "-showme:version", strlen("-showme:version"))
	|| 0
	== strncmp(user_argv[i], "--showme:version",
	strlen("--showme:version"))) {
	char *str;
	str = opal_show_help_string("help-opal-wrapper.txt", "version", false, base_argv0,
	options_data[user_data_idx].project,
	options_data[user_data_idx].version,
	options_data[user_data_idx].language, NULL);

~/local/ompi-master/bin/mpifort --showme:version
mpifort: Open MPI 5.1.0a1 (Language: Fortran)

[rhc54]

You said mpirun, not mpifort 😄 . I agree that the wrapper compilers would behave that way.

[ggouaillardet]

Oh i see, my bad!

Thanks for pointing out.

[cponder]

Ok this gives me what I need:

--> mpifort --showme:version
mpifort: Open MPI 5.0.7 (Language: Fortran)

--> mpirun -V
mpirun (Open MPI) 5.0.7

One thing I gotta say, though: the --showme doesn't show up when I use either of these:

mpifort --help
mpicxx --help

[ggouaillardet]

@cponder well, the right syntax is

$ mpifort --showme:help
mpifort [-showme[:<command,compile,link,incdirs,
              libdirs,libs,version,help>]] args

  -showme:command    Show command used to invoke real compiler
  -showme:compile    Show flags added when compiling
  -showme:link       Show flags added when linking
  -showme:incdirs    Show list of include dirs added when compiling
  -showme:libdirs    Show list of library dirs added when linking
  -showme:libs       Show list of libraries added when linking
  -showme:version    Show version of Open MPI
  -showme:help       This help message

[cponder]

I'd kinda expect

mpifort --help

to at least mention that there's a --showme option, which it doesn't. This goes against all Linux/GNU/etc. conventions, which is what brought me to post this in the first place....

[ggouaillardet]

mpifort serves as a wrapper, meaning that just as the --version flag is forwarded to the Fortran compiler, the --help flag is similarly passed along to it. If you believe this is an issue worth addressing and can gather enough support, feel free to open another issue.