BUG : compile on debian jessie
I must modify the "whichmpi" variable in the file OpenFOAM-v3.0+/src/Pstream/Allwmake in order to compile Openfoam-v3.0+
initial v3.0+ variable :
whichmpi="WM_PROJECT_DIR/platforms/
WM_OPTIONS/src/Pstream/libName/using:
FOAM_MPI"
modified v3.0+ variable (identical to 2.4.0 variable):
whichmpi="libName/Make/
WM_OPTIONS/using:$FOAM_MPI"