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Compilation failure with gcc 16

Status: Open.

#13757 In open-mpi/ompi;

· opoplawski opened on Mar 5, 2026

Parallelization issue with Monte Carlo codes on Apple M3 Ultra

Status: Open.

#13755 In open-mpi/ompi;

· MATHISB15 opened on Mar 5, 2026

mca_fbtl_posix_pwritev: error in (p)write(v):Bad address with openMPI 6.1

Status: Open.

#13754 In open-mpi/ompi;

· denisbertini opened on Mar 4, 2026

ompi_info fails with libcuda.so.1 not found

Status: Open.

#13750 In open-mpi/ompi;

· hjjvandam opened on Feb 27, 2026

MPI-5: Need to define values for all pre-defined data types in mpi.h include file

Status: Open.

#13741 In open-mpi/ompi;

· hppritcha opened on Feb 24, 2026

OMPI OFI BTL accumulate buggy/not optimized

Status: Open.

#13740 In open-mpi/ompi;

· aingerson opened on Feb 24, 2026

OPAL ERROR: Unreachable in file ext3x_client.c at line 112

Target: v5.0.x

Status: Open.

#13725 In open-mpi/ompi;

· JOHN194872 opened on Feb 10, 2026

Setting OMPI_MCA_btl_tcp_if_include=lo as default

Status: Open.

#13722 In open-mpi/ompi;

· amckinstry opened on Feb 9, 2026

User ML: Building OpenMPI 5.0.8 or 5.0.9 with gcc 16

Status: Open.

#13721 In open-mpi/ompi;

· devreal opened on Feb 8, 2026

<code>--enable-mca-dso</code> broken on main (and likely v6.0.x)

Severity: blocker

Target: v6.0.x

Status: Open.

#13717 In open-mpi/ompi;

· bwbarrett opened on Feb 4, 2026

accelerator_cuda_check_addr expensive in CUDA-aware MPI

Status: Open.

#13708 In open-mpi/ompi;

· NamjaeChoi opened on Feb 2, 2026

liboshmem occasionally fails with "memheap_base_segment_setup() Failed to setup base segment address"

Status: Open.

#13698 In open-mpi/ompi;

· C-Newman opened on Jan 28, 2026