Announcing Open-MPI v4.0.5rc1 available for download and test at

Please test and send feedback to

Fixed in v4.0.5: When launching under SLURM's srun, Open MPI will honor SLURM's binding policy even if that would leave the processes unbound.

4.0.5 -- July, 2020
- Disable binding of MPI processes to system resources by Open MPI
  if an application is launched using SLURM's srun command.
- Disable building of the Fortran mpi_f08 module when configuring
  Open MPI with default 8 byte Fortran integer size.  Thanks to
  @ahcien for reporting.
- Fix a problem with mpirun when the --map-by option is used.
  Thanks to Wenbin Lyu for reporting.
- Fix some issues with MPI one-sided operations uncovered using Global
  Arrays regression test-suite.  Thanks to @bjpalmer for reporting.
- Fix a problem with make check when using the PGI compiler.  Thanks to
  Carl Ponder for reporting.
- Fix a problem with MPI_FILE_READ_AT_ALL that could lead to application
  hangs under certain circumstances.  Thanks to Scot Breitenfeld for
- Fix a problem building C++ applications with newer versions of GCC.
  Thanks to Constantine Khrulev for reporting.

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