- to choose mpi4py over boost.python.mpi, pass -DPython_use_mpi4py=ON
- boost.mpi stays the default for python, but
adding the possibility of using mpi4py instead.
- Due to numerous pbs on recent OS X + brew installation.
boost.mpi does not work (crash in openmpi ??), mpi4py does
- the pytriqs/utility/mpi.py is now configured by the cmake (like
version.py) to prepare one of the two possibilities.
- TODO: not tested carefully : to be done in other machines.
