I asked Larry a variation of this at DigiPro and he suggested I ask on this list, as the answer was mildly complicated.
I observed OCIO and OIIO had build dependencies on each other, so I was wondering if there was a recommended build order? (And now that I'm asking, I'll throw OpenExr into the mix for the question as well - are there any dependencies on OCIO? Or is it as simple as "Just build OpenExr first."?)