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Open MPI has been relying on versions of PMIx since the 2.0.0 release. Although the embedded version can be used, it makes more sense long term for Spack to know about the PMIx package, and to build Open MPI against PMIx as an external package. There are other software components that may eventually be reliant on PMIx including MPICH, GASNet, the OpenSHMEM reference implementation, etc. This is also partly motivated by the desire to have ECP ST projects to be released through Spack. Signed-off-by: Howard Pritchard <howardp@lanl.gov> |
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