• Andreas Marek's avatar
    Optional build of ELPA without MPI · 49f119aa
    Andreas Marek authored
    The configure flag "--enable-shared-memory-only" triggers a build
    of ELPA without MPI support:
    - all MPI calls are skipped (or overloaded)
    - all calls to scalapack functions are replaced by the corresponding
      lapack calls
    - all calls to blacs are skipped
    Using ELPA without MPI gives the same results as using ELPA with 1 MPI
    This version is not yet optimized for performance, here and there some
    unecessary copies are done.
    Ths version is intended for users, who do not have MPI in their
    application but still would like to use ELPA on one compute node