invoke 25 ompi/mpi/fortran/use-mpi-f08/bindings/mpi-f-interfaces-bind.h ! invoke a back-end ompi_*_f() subroutine, which is BIND(C)-bound to a invoke 33 ompi/mpi/fortran/use-mpi-f08/bindings/mpi-f-interfaces-bind.h ! invoke the back-end ompi_*_f() C function. There are 2 cases: