MPICH 5.0.2rc1 Released

A new release candidate of MPICH, 5.0.2rc1, is now available for download. This release addresses a number of user-reported issues. It can be found on our downloads page. Direct link to mpich-5.0.2rc1.tar.gz. For the full set of commits see https://github.com/pmodels/mpich/compare/v5.0.1…v5.0.2rc1/.

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                   Changes in 5.0.2rc1
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# Fix early MPI_T_finalize causing segfault in internal CVAR access

# Fix passing build flags to wrapper mpicc

# Fix buffer overflow in error message printing

# Fix deadlock issue with parallel GPU buffer copies in IPC path

# Fix thread safety issues in OFI RMA put/get operations

# Fix missing Rput/Rget paths for noncontiguous data with UCX

# Fix GPU RMA message descriptor passing in OFI

# Fix memory leak in CMA code

# Fix MPI_Cart_sub with zero-dimensional topology

# Fix MPI_Type_get_contents output datatype conversion in ABI layer

# Fix MPI_Status_set_elements_x for large counts

# Fix MPI_Pack_external with internal datatype mapping

# Fix reduction operations for Fortran 90 created types

# Fix Fortran 90 MPI_Type_create_f90_complex to support complex4

# Fix configure mapping of MPIR_REAL_INTERNAL for Fortran types

# Fix PMIx session re-initialization by adding MPIR_CVAR_FINALIZE_ATEXIT

# Fix max_align_t alignment check for portability

# Fix wrong communicator use in ROMIO ADIOI_GEN_OpenColl

# Fix rank allocation consistency in MPI_Comm_spawn

# Fix Hydra filler_processes initialization in proxy

# Fix MPI_Comm_create_from_group to return null communicator for
  empty group

# Fix hierarchy attribute test in communicator code

# Fix async request type reset in MPIR_async_test

# Fix shared memory base address checking in ch3/nemesis

# Fix AVX detection on macOS x86_64

# Fix libmpi_abi.so version-info not being applied

# Fix configure syntax issues and unquoted shell variables

# Fix configure to prevent AC_PROG_CC from adding -std=gnu23 to CC

# Fix OFI inject path to skip when memory registration is required

# Fix OFI to avoid FI_MATCH_COMPLETE for small messages improving
  compatibility

# Fix OFI to use emulated inject instead of blocking send

# Fix OFI to always process window accumulate hints

# Add support for HWLOC_OBJ_DIE topology object

# Add option to build mpicxx wrapper without libmpicxx

# Replace select() with poll() in Hydra MPIE_IOLoop

# Improve error message for progress timeout

# Various compiler warning fixes