mpif77 (1) - Linux Manuals
mpif77: Deprecated Open MPI Fortran wrapper compilers
NAME
mpif77, mpif90 -- Deprecated Open MPI Fortran wrapper compilers
SYNTAX
mpif90 ...DESCRIPTION
The mpif77 and mpif90 wrapper compiler names are deprecated, and will disappear in a future version of Open MPI. You should use the mpifort wrapper compiler, instead. While they are deprecated, mpif77 and mpif90 accept all the same parameters as mpifort, and behaves the same as mpifort.
With mpifort, you can compile any Fortran program that uses the "mpif.h", "use mpi", and/or "use mpi_f08" MPI Fortran interfaces.
See mpifort(1) for more details.