A new stable release of MPICH, 4.0.1, is now available for download. This is the first bug-fix release in the 4.0.x series. This release contains fixes for Hydra, NVIDIA compiler support, macOS support, Fortran, MPI Sessions, documentation, and other user-reported bugs and build issues. You can find the release on our downloads page (https://www.mpich.org/downloads/). Production environments are encouraged to upgrade to this release. Regards, The MPICH team =============================================================================== Changes in 4.0.1 =============================================================================== # Multiple fixes for NVIDIA/PGI HPC Compilers support # Fix ch4:ofi:gni provider capability set # Fix MPI_SESSION_INIT "thread_level" info hint # Fix build on macOS with --disable-shared # Fix QMPI function definitions # Fix support for "host" info hint in MPI_COMM_SPAWN[_MULTIPLE] # Fix manpage generation # Add missing MPI_F_sync_reg function # Add missing const to MPI_Psend_init buffer argument # Make Python 3 optional in configure script # Remove -Wl,flat_namespace from compile wrappers by default (macOS only) # Update UCX module to v1.12.0 # Update yaksa module to support latest Ampere compute capability A full list of changes is available at the following link: https://github.com/pmodels/mpich/compare/v4.0…v4.0.1