[bug#65801] [PATCH] gnu: openmpi: Enable PMIx.

[Lars Bilke <lars.bilke@ufz.de>]

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Enables support for the Process Management Interface for Exascale which is used e.g. by Slurm for the management communication and coordination of MPI processes.

This allows e.g. to run guix-created container on JSC Juwels cluster with native performance.

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From 23a11683c37faf8b971628b2ded9560ba5a22965 Mon Sep 17 00:00:00 2001
From: Lars Bilke <lars.bilke@ufz.de>
Date: Thu, 7 Sep 2023 15:06:03 +0200
Subject: [PATCH] [PATCH] gnu: openmpi: Enable PMIx.

Enables support for the Process Management Interface for Exascale which
is used e.g. by Slurm for the management communication and coordination
of MPI processes
---
 gnu/packages/mpi.scm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/packages/mpi.scm b/gnu/packages/mpi.scm
index 4d2458344f..907cd3af29 100644
--- a/gnu/packages/mpi.scm
+++ b/gnu/packages/mpi.scm
@@ -247,6 +247,10 @@ (define-public openmpi
                             "--enable-openib-rdmacm"
                             "--enable-openib-rdmacm-ibaddr"
 
+                            ;; Enable support for the 'Process Management
+                            ;; Interface for Exascale'.
+                            "--with-pmix=internal"
+
                             ;; Enable support for SLURM's Process Manager
                             ;; Interface (PMI).
                             ,(string-append "--with-pmi="
-- 
2.41.0