+Add a barrier in MPI_Finalize
+.............................
+
+.. _cfg=smpi/finalization-barrier:
+
+**Option** ``smpi/finalization-barrier`` **default:** off
+
+By default, SMPI processes are destroyed as soon as soon as their code ends,
+so after a successful MPI_Finalize call returns. In some rare cases, some data
+might have been attached to MPI objects still active in the remaining processes,
+and can be destroyed eagerly by the finished process.
+If your code shows issues at finalization, such as segmentation fault, triggering
+this option will add an explicit MPI_Barrier(MPI_COMM_WORLD) call inside the
+MPI_Finalize, so that all processes will terminate at almost the same point.
+It might affect the total timing by the cost of a barrier.
+