Ok, this solved the problem with the Pathscale compiler.
>Date: Thu, 1 Jun 2006 17:37:36 -0400
>From: "Jeff Squyres \(jsquyres\)" <jsquyres_at_[hidden]>
>Subject: Re: [OMPI users] openmpi-1.1a9r10157 Fails to build with Nag
>To: "Open MPI Users" <users_at_[hidden]>
>Content-Type: text/plain; charset="us-ascii"
>This was actually reported earlier today (off list). It was the result
>of a botched merge from the trunk to the v1.1 branch. I have fixed the
>issue as of r10171 (it was a one-line mistake); the fix should show up
>in the snapshot tarballs tonight.