message: configure master rank to only print
diff: @@ -269,6 +269,12 @@ void AmgXSolver::InitAmgX()
  AMGX_SAFE_CALL(AMGX_initialize_plugins());
  AMGX_SAFE_CALL(AMGX_install_signal_handler());
  +
  + AMGX_SAFE_CALL(AMGX_register_print_callback(
  + [](const char *msg, int length)->void
  + {
  + int irank; MPI_Comm_rank(MPI_COMM_WORLD, &irank);
  + if (irank == 0) { printf("%s",msg);} }));
  }
  MFEM_VERIFY(configSrc != CONFIG_SRC::UNDEFINED,
  