Seth R. Johnson 8ab6539c0e Add important variants to MOAB and Geant4 (#9409) ...

* Add option to disable threads for Geant4
* Add option to enable DagMC in MOAB
* Explicitly add OFF flag when threading is disabled
* Fix unintentional enabling of C++14 in Geant4
  The following always evaluated to True:
    'c++14' or 'c++1y' in spec:

2018-10-09 17:05:49 -07:00

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spack

Add important variants to MOAB and Geant4 (#9409)

2018-10-09 17:05:49 -07:00