The issue mentioned above as a blocker has been resolved on Jun 21, 2016. Any
Open MPI version starting from 1.10.3 supports MPI_THREAD_MULTIPLE correctly.
It has even become the default and the option was removed altogether in version
Based on this, could you please reconsider enabling thread support in
this package for the upcoming Ubuntu 18.04 (Bionic) release?
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Enabling thread support in OpenMPI
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