My-PC:~ me$ mpif90 -show /opt/local/bin/gfortran-mp-5 -pipe -m64 -Wl,-headerpad_max_install_names -arch x86_64 -Wl,-flat_namespace -Wl,-commons,use_dylibs -I/opt/local/include/mpich-mp -I/opt/local/include/mpich-mp -L/opt/local/lib/mpich-mp -lmpifort -lmpi -lpmpi
My-PC:~ me$ which mpif90 /opt/local/bin/mpif90