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

[Dave Love <fx@gnu.org>]

Ludovic Courtès <ludo@gnu.org> writes:

> Hello Dave,
>
> Sorry for the looong delay!

I'm sure you deserve holidays.

> I went ahead and applied the patch you posted, minus the extra outputs,

What's the problem with a runtime output?  I think it's a problem if
running MPI programs requires a development environment on compute
nodes.

> and without ‘string-append’ in the description (which prevents l10n).

OK.  I'll post a general question about that.  I'm happy to support
localization (or even localisation for misguided people
<https://en.wikipedia.org/wiki/Oxford_spelling>).

>>> What do you have in mind for SLURM?
>>
>> There's integration with SLURM (--with-slurm), PBS/Torque, and LSF (or,
>> I guess, Open Lava in the free world).  I don't know much about them,
>> but they build MCA modules.  Unlike the gridengine support, they link
>> against libraries for the resource managers, so you want them to be
>> add-ons which are only installed when required (not like the Fedora
>> packaging).
>
> I see.  I suppose we could make them separate outputs to avoid the
> overhead, if that’s justified?

Yes, I think so.  It's probably best if someone does it who uses those
resource managers and can test the result.