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

From: Dave Love
Subject: [bug#27850] gnu: mpi: openmpi: Don't enable thread-multiple
Date: Thu, 07 Sep 2017 17:16:58 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Ludovic Courtès <address@hidden> writes:

> Heya,
> Dave Love <address@hidden> skribis:
>> 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.
> As I wrote before, Guix currently doesn’t have as fine grain a
> separation as Debian, Fedora, & co.: we add an extra output when we have
> evidence that it provides noticeably space savings.

Sorry again, I'd forgotten, with holiday breaks and things, about the
dependency on gfortran being removed.  (I'm not sure that's a good idea,
since the library is version-specific.)  Since I've expurgated the
contribution to the closure from valgrind it looks a lot better.
Keeping a dependency on gfortran I think would only contribute the
"self" of gfortran.  That's actually a lot smaller than libgfortran,
which has a load of stuff that presumably shouldn't be in it, like
libstdc++ and the sanitizer support.

> We could discuss that policy of course, but that’s another story.
> Ludo’.

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