On Jul 10, 2018, at 5:11 PM, Geoffrey Paulsen <gpaul...@us.ibm.com> wrote:
>    In Open MPI v4.0, one of the changes that we're making is to prefer 
> external packages in configure versus our internal packages for libevent, 
> hwloc, and pmix (also see https://github.com/open-mpi/ompi/issues/5031).  
> There are some restrictions about only preferring external packages that are 
> "compatible", but in general we hope this should make redistributing Open MPI 
> easier as a whole.   We're working on this feature here 
> https://github.com/open-mpi/ompi/pull/5395 if you want to follow along.

Heads up: Arrgh.  It looks like we're going to miss this feature -- 
unfortunately, no one was able to devote enough time to finish it.  :-(

Sorry folks.  The existing "external" mechanisms will all still work, of 
course, but our configure script won't "prefer" them, so to speak.  So it's not 
a major deal for this feature to have missed v4.0.0, but it's still a bit of a 

Jeff Squyres

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