OpenMPI 5.0 Ready To Say "Goodbye" To 32-Bit Support

Written by Michael Larabel in Hardware on 3 February 2023 at 06:40 AM EST. 7 Comments
The OpenMPI message passing interface library is ready to completely abandon 32-bit software support with its forthcoming v5.0 release.

OpenMPI 5.0 plans to ship without 32-bit software support, regardless whether Arm, x86, or for other 32-bit CPU architectures. 32-bit software environments are simply not going to be supported and the OpenMPI build system is set to abort if trying to build for a 32-bit environment.

OpenMPI drops 32-bit support

At this stage the change is just with the build system to block 32-bit builds so if a real need arises it could be reverted after OpenMPI 5.0.0, but the hope by this MPI project is that they can finally retire 32-bit software support in full. If no one complains, the developers will move ahead and gutting the rest of the 32-bit infrastructure/code. The developers found no one willing to step up to maintain the 32-bit support no any real-world users/customers relying on it.

Xeon LV
Intel Xeon LV 32-bit processors from many years ago at Phoronix... It's been a while since 32-bit hardware/software was common for HPC use.

OpenMPI is widely-used in the HPC space that has been 64-bit for a while and in 2023 it's a good move to finally bid farewell to 32-bit support where users can continue relying upon OpenMPI 4.x if really there is such a real-world use remaining. If you are making serious use of MPI / OpenMPI in 2023 and beyond for parallel computing, it's past due to upgrade.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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