Hi Craig,
We had another user with a similar problem, see HERE, but unfortunately, we were never able to get to the bottom of it. Also, OpenMPI links fine here so again we’re at a bit of a loss.
In searching the web, I came across a similar problem (See HERE) where the issue was with the binutils installed on the system. What OS are you using and what binutils are installed? ('ld --version")
Thanks,
Mat