cmake fortran using env

MESSAGE (STATUS "MPI_Fortran_COMPILER ${MPI_Fortran_COMPILER}")

if ("${MPI_C_COMPILER}" STREQUAL "MPI_C_COMPILER-NOTFOUND")

    MESSAGE (STATUS "NO COMPILE WITH ${SPACK_CC}")

    MESSAGE (STATUS "NO COMPILE WITH $ENV{SPACK_CC}")

    set(CMAKE_C_COMPILER "${SPACK_CC}")

else()

    MESSAGE (STATUS "YES COMPILE WITH ${SPACK_CC}")

    MESSAGE (STATUS "YES COMPILE WITH $ENV{MPI_C_COMPILER}")

    set(CMAKE_C_COMPILER "${MPI_C_COMPILER}")

endif()

MESSAGE (STATUS "COMPILE WITH CMAKE_C_COMPILER ${CMAKE_C_COMPILER}")

if ("${MPI_CXX_COMPILER}" STREQUAL "MPI_CXX_COMPILER-NOTFOUND")

    set(CMAKE_C_COMPILER "${SPACK_CXX}")

    set(CMAKE_C_COMPILER "$ENV{SPACK_CXX}")

else()

    set(CMAKE_CXX_COMPILER "${MPI_CXX_COMPILER}")

endif()

if ("${MPI_Fortran_COMPILER}" STREQUAL "MPI_Fortran_COMPILER-NOTFOUND")

    set(CMAKE_Fortran_COMPILER "${SPACK_FC}")

    set(CMAKE_Fortran_COMPILER "$ENV{SPACK_FC}")

else()

    set(CMAKE_Fortran_COMPILER "${MPI_Fortran_COMPILER}")

endif()