Bug#1087136: mpi4py: Warning at build time: "A requested component was not found"

[Santiago Vila]

Package: src:mpi4py
Version: 4.0.0-9
Severity: minor

Hello.

I've just updated the variable to allow oversubscription
in debian/rules.

This is just to note some pending issues:

* I didn't find a well-documented replacement for several
of the previous OMPI_* environment variables. Maybe they
are not needed anymore.

* Now the following warning is issued:

--------------------------------------------------------------------------
A requested component was not found, or was unable to be opened.  This
means that this component is either not installed or is unable to be
used on your system (e.g., sometimes this means that shared libraries
that the component requires are unable to be found/loaded).  Note that
PMIx stopped checking at the first component that it did not find.

Host:      test-1
Framework: plm
Component: isolated
--------------------------------------------------------------------------

I searched a little bit and found this:

https://giter.vip/ipython/ipyparallel/issues/865

where this workaround is suggested:

export OMPI_MCA_plm=ssh
export OMPI_MCA_plm_ssh_agent=false

However, in the same message we can read this:

> [...] PRRTE, which was adopted in ompi 5, lacks an isolated plm

So maybe those environment variables are not the right fix and this part
should be forwarded upstream.

Thanks.