[bug#27850] gnu: mpi: openmpi: Don't enable thread-multiple

[Dave Love <fx@gnu.org>]

Ludovic Courtès <ludo@gnu.org> writes:

> Dave Love <fx@gnu.org> skribis:
>
>> Ludovic Courtès <ludo@gnu.org> writes:
>
> [...]
>
>>> I went ahead and applied the patch you posted, minus the extra outputs,
>>
>> What's the problem with a runtime output?
>
> It’s mostly that this should be a separate patch, as discussed earlier.

OK.  I've lost track, sorry.  I'll have another look.

> It’s not a problem per se as long as it does help reduce the size of
> what people commonly install, which is not obvious to me.

I'm afraid I don't know about "commonly", particularly with Guix, but
I'm surprised if people would expect to get the respective MPI
development environment for an MPI program they install any more than
they'd expect the compiler generally.  The separation other
distributions have seems appropriate to me as a system manager and
packager -- even if it's not the typical HPC way (Spack et al?) -- but
that's just my opinion.