psm2 support causes mtl/ofi, btl/ofi conflict

[hkuno]

psm2 support causes mtl/ofi, btl/ofi conflict

Background information

This issue was buried in pull request 6734.The problem was also discussed on the devel list, e.g., Ralph H Castain's Sept. 2018 email.

Problem

Howard Pritchard commented:

The underlying issue is that using PSM2 through libfabric and directly doesn't work. Although it appears to be okay to call PSM2_Init more than once, the same is not true for
PSM2_finalize.

Howard suggested that a work-around might be to add a configure option so that if HAVE_PSM2 is defined, don't initialize the MTL ofi and BTL ofi components.

What version of Open MPI are you using? (e.g., v3.0.5, v4.0.2, git branch name and hash, etc.)

master

Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)

git clone

Please describe the system on which you are running

Intel PSM2