alalazo b86e3047f3 openmpi : revert part of #1079 (OpenMPI can be built without fortran) ... Building OpenMPI without fortran is possible, and was already handled. Raising an install error we effectively renounce at clang+OpenMPI. build_environment : sets 'CC', 'CXX', and similar variables only if a compiler is found		2016-06-20 20:46:11 +02:00
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spack	openmpi : revert part of #1079 (OpenMPI can be built without fortran)	2016-06-20 20:46:11 +02:00