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doc: update CHANGES for 4.2
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Add more entries to CHANGES.

Update version to 4.2b1.
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hzhou committed Nov 10, 2023
1 parent 19a6e0e commit bfed0f5
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36 changes: 31 additions & 5 deletions CHANGES
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===============================================================================
# Complete support MPI 4.1 specification

# Experimental thread communicator feature (e.g. MPIX_Threadcomm_init).
See paper "Frustrated With MPI+Threads? Try MPIxThreads!",
https://doi.org/10.1145/3615318.3615320.

# Experimental datatype functions MPIX_Type_iov_len and MPIX_Type_Iov

# Experimental op MPIX_EQUAL for MPI_Reduce and MPI_Allreduce (intra
communicator only)

# Use --with-{pmi,pmi2,pmix]=[path] to configure external PMI library.
Convenience options for Slurm and cray deprecated. Use --with-pmi=oldcray
for older Cray environment.
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# Yaksa updated to auto detect the GPU architecture and only build for
the detected arch. This applies to CUDA and HIP support.

# MPI_Win_shared_query can be used on windows created by MPI_Win_create,
MPI_Win_allocate, in addition to windows created by MPI_Win_allocate_shared.
MPI_Win_allocate will create shared memory whenever feasible, including between
spawned processes on the same node.

# Fortran mpi.mod support Type(c_ptr) buffer output for MPI_Alloc_mem,
MPI_Win_allocate, and MPI_Win_allocate_shared.

# New functions added in MPI-4.1: MPI_Remove_error_string, MPI_Remove_error_code,
and MPI_Remove_error_class

# New functions added in MPI-4.1: MPI_Request_get_status_all,
MPI_Request_get_status_any, and MPI_Request_get_status_some.

# New function added in MPI-4.1: MPI_Type_get_value_index.

# New functions added in MPI-4.1: MPI_Comm_attach_buffer, MPI_Session_attach_buffer,
MPI_Comm_detach_buffer, MPI_Session_detach_buffer,
MPI_Buffer_flush, MPI_Comm_flush_buffer, MPI_Session_flush_buffer,
MPI_Buffer_iflush, MPI_Comm_iflush_buffer, and MPI_Session_iflush_buffer.
Also added constant MPI_BUFFER_AUTOMATIC to allow automatic buffers.

# Support for "mpi_memory_alloc_kinds" info key. Memory allocation kind
requests can be made via argument to mpiexec, or as info during
session creation. Kinds supported are "mpi" (with standard defined
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decided at the October 2023 meeting that this was a mistake and will
be removed in an erratum.

# New functions added in MPI-4.1: MPI_Comm_attach_buffer, MPI_Session_attach_buffer,
MPI_Comm_detach_buffer, MPI_Session_detach_buffer,
MPI_Buffer_flush, MPI_Comm_flush_buffer, MPI_Session_flush_buffer,
MPI_Buffer_iflush, MPI_Comm_iflush_buffer, and MPI_Session_iflush_buffer.
Also added constant MPI_BUFFER_AUTOMATIC to allow automatic buffers.

===============================================================================
Changes in 4.1
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2 changes: 1 addition & 1 deletion maint/version.m4
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# changing this by playing with diversions, but then we would probably be
# playing with autotools-fire.

m4_define([MPICH_VERSION_m4],[4.2a1])dnl
m4_define([MPICH_VERSION_m4],[4.2.0b1])dnl
m4_define([MPICH_RELEASE_DATE_m4],[unreleased development copy])dnl

# For libtool ABI versioning rules see:
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