Sent from my iPhone

On Nov 25, 2013, at 5:04 PM, Pierre Jolivet <> wrote:

On Nov 24, 2013, at 3:03 PM, Jed Brown <> wrote:

Ralph Castain <> writes:

Given that we have no idea what Homebrew uses, I don't know how we
could clarify/respond.

Ralph, it is pretty easy to know what Homebrew uses, c.f. (sorry if you meant something else).

Might be a surprise, but I don't track all these guys :-)

Homebrew is new to me

Pierre provided a link to MacPorts saying that all of the following
options were needed to properly enable threads.

--enable-event-thread-support --enable-opal-multi-threads --enable-orte-progress-threads --enable-mpi-thread-multiple

If that is indeed the case, and if passing some subset of these options
results in deadlock, it's not exactly user-friendly.

Maybe --enable-mpi-thread-multiple is enough, in which case MacPorts is
doing something needlessly complicated and Pierre's link was a red

That is very likely, though on the other hand, Homebrew is doing something pretty straightforward. I just wanted a quick and easy fix back when I had the same hanging issue, but there should be a better explanation if --enable-mpi-thread-multiple is indeed enough.

It is enough - we set all required things internally


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