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-rw-r--r--gnu/packages/mpi.scm14
1 files changed, 13 insertions, 1 deletions
diff --git a/gnu/packages/mpi.scm b/gnu/packages/mpi.scm
index f34b08e4ca..7dfec16fc7 100644
--- a/gnu/packages/mpi.scm
+++ b/gnu/packages/mpi.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014, 2015 Eric Bavier <bavier@member.fsf.org>
+;;; Copyright © 2014, 2015, 2018 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014 Ian Denhardt <ian@zenhack.net>
;;; Copyright © 2016 Andreas Enge <andreas@enge.fr>
@@ -250,3 +250,15 @@ software vendors, application developers and computer science researchers.")
work correctly with all transports (such as @code{openib}), and the
performance is generally worse than the vanilla @code{openmpi} package, which
only provides @code{MPI_THREAD_FUNNELED}.")))
+
+;;; Build phase to be used for packages that execute MPI code.
+(define-public %openmpi-setup
+ '(lambda _
+ ;; By default, running the test suite would fail because 'ssh' could not
+ ;; be found in $PATH. Define this variable to placate Open MPI without
+ ;; adding a dependency on OpenSSH (the agent isn't used anyway.)
+ (setenv "OMPI_MCA_plm_rsh_agent" (which "false"))
+ ;; Allow oversubscription in case there are less physical cores available
+ ;; in the build environment than the package wants while testing.
+ (setenv "OMPI_MCA_rmaps_base_oversubscribe" "yes")
+ #t))