[mpich-discuss] MPI ABI in mpich 5.0*

[Alastair McKinstry]

Hi Howard

Thanks. I’m interested as the main packager of MPI for Debian; ie are we going to have another / definitive ABI for MPI “soon”, and testing it against the archive of applications.

I plan to rebuild all MPI apps in Debian against mpi_abi (for both MPICH and OpenMPI when they add MPI-5 support), for now I’ll just test C apps on MPICH.

Alastair

From: Howard Pritchard via discuss <discuss at mpich.org>
Date: Wednesday, 1 April 2026 at 16:10
To: discuss at mpich.org <discuss at mpich.org>
Cc: Howard Pritchard <hppritcha at gmail.com>, Raffenetti, Ken <raffenet at anl.gov>
Subject: Re: [mpich-discuss] MPI ABI in mpich 5.0*

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Hi Alastair,

You may want to try https://urldefense.us/v3/__https://github.com/eschnett/mpif__;!!G_uCfscf7eWS!crBJ_El5zGm5z9Ztr4gN5dlGlNRTKf4u1E8_axt2CMZ4pxgxcohpjkIB3HxlYUN5UzQH7nw1XytOBxO584jAvSarEA$ <https://urldefense.us/v3/__https://github.com/eschnett/mpif__;!!G_uCfscf7eWS!fNDCfjp-zbNtIIoZo6FXCKJelsZeoMaPSKr6tQ-PzThxDN5Rvy07nUMAfeL33__dr1aRfcTusPfnUgPx$> .

Howard


Am Mi., 1. Apr. 2026 um 08:32 Uhr schrieb Raffenetti, Ken via discuss <discuss at mpich.org<mailto:discuss at mpich.org>>:
MPICH does not currently provide the mpifort_abi library and compile wrapper. I’ve created an issue to note this and track progress on implementation for the next major release. Thanks for the question/report. https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues/7759__;!!G_uCfscf7eWS!crBJ_El5zGm5z9Ztr4gN5dlGlNRTKf4u1E8_axt2CMZ4pxgxcohpjkIB3HxlYUN5UzQH7nw1XytOBxO584gGthixKA$ <https://urldefense.us/v3/__https://github.com/pmodels/mpich/issues/7759__;!!G_uCfscf7eWS!dhcl4kjSZYjcwlIZSnx8rK7SAlMZi5SDf_WeJSm58xEivfpKRQIxOJFgXfT72UTbpgGtGjvN8DQjori1$>

Ken

From: Alastair McKinstry via discuss <discuss at mpich.org<mailto:discuss at mpich.org>>
Date: Tuesday, March 31, 2026 at 11:02 AM
To: discuss at mpich.org<mailto:discuss at mpich.org> <discuss at mpich.org<mailto:discuss at mpich.org>>
Cc: Alastair McKinstry <mckinstry at debian.org<mailto:mckinstry at debian.org>>
Subject: [mpich-discuss] MPI ABI in mpich 5.0*

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Hi,

Does mpich 5.0.0 support the full MPI ABI standard ? I see it creates
mpicc_abi which links against libmpi_abi, but no equivalent mpifort_abi.
Is this planned?

Best regards

Alastair

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Alastair McKinstry,
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