Build issue: fortran vs mpi

[cyrush]

1 error found in build log: 
     46    -- Git Version: 2.29.1
     47    -- MPI Support is ON
     48    -- Enable FindMPI:  ON
     49    -- Found MPI_C: /usr/tce/packages/mvapich2-tce/mvapich2-2.3.6-gcc-10
           .2.1/lib/libmpi.so (found version "3.1")
     50    -- Found MPI_CXX: /usr/tce/packages/mvapich2-tce/mvapich2-2.3.6-gcc-
           10.2.1/lib/libmpicxx.so (found version "3.1")
     51    -- Could NOT find MPI_Fortran (missing: MPI_Fortran_LIB_NAMES MPI_Fo
           rtran_WORKS)
  >> 52    CMake Error at /collab/usr/gapps/python/build/spack-toss4.1/opt/spac
           k/linux-rhel8-ivybridge/gcc-10.3.1/cmake-3.23.0-j5cyb22zmdfxsxgjtb3q
           rmnmfaenuowa/share/cmake-3.23/Modules/FindPackageHandleStandardArgs.
           cmake:230 (message):
     53      Could NOT find MPI (missing: MPI_Fortran_FOUND) (found version "3.
           1")
     54    Call Stack (most recent call first):
     55      /collab/usr/gapps/python/build/spack-toss4.1/opt/spack/linux-rhel8
           -ivybridge/gcc-10.3.1/cmake-3.23.0-j5cyb22zmdfxsxgjtb3qrmnmfaenuowa/
           share/cmake-3.23/Modules/FindPackageHandleStandardArgs.cmake:594 (_F
           PHSA_FAILURE_MESSAGE)
     56      /collab/usr/gapps/python/build/spack-toss4.1/opt/spack/linux-rhel8
           -ivybridge/gcc-10.3.1/cmake-3.23.0-j5cyb22zmdfxsxgjtb3qrmnmfaenuowa/
           share/cmake-3.23/Modules/FindMPI.cmake:1830 (find_package_handle_sta
           ndard_args)
     57      blt/cmake/thirdparty/SetupMPI.cmake:37 (find_package)
     58      blt/cmake/thirdparty/SetupThirdParty.cmake:29 (include)