You did everything right - the OSHMEM implementation in OMPI only supports UCX as it is essentially a Mellanox offering. I think the main impediment to broadening it is simply interest and priority on the part of the non-UCX developers.
> On Mar 22, 2021, at 7:51 AM, Michael Di Domenico via users > <users@lists.open-mpi.org> wrote: > > i can build and run openmpi on an opa network just fine, but it turns > out building openshmem fails. the message is (no spml) found > > looking at the config log it looks like it tries to build spml ikrit > and ucx which fail. i turn ucx off because it doesn't support opa and > isn't needed. > > so this message is really just a confirmation that openshmem and opa > are not capable of being built or did i do something wrong > > and a curiosity if anyone knows what kind of effort would be involved > in getting it to work
