19.1.1. Semantic Changes Starting in MPI-4.0
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- MPI_COMM_DUP and MPI_COMM_IDUP no longer propagate info hints from the input
communicator to the output communicator. This behavior can be achieved using
MPI_COMM_DUP_WITH_INFO and MPI_COMM_IDUP_WITH_INFO.
- The default communicator where errors are raised when not involving a
communicator, window, or file was changed from MPI_COMM_WORLD to
MPI_COMM_SELF.
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(Unofficial) MPI-4.1 of November 2, 2023
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