Re: openmpi 5.0.0 drops 32-bit support

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On Fri, Feb 3, 2023 at 5:20 AM Orion Poplawski <orion@xxxxxxxx> wrote:
>
> As a heads up - openmpi 5.0.0 drops support for 32-bit builds [1].  I'm
> not sure how far away it is from release - we're on rc10 at the moment.
>
> Affected packages seem to be:
>
> amg4psblas-1.1.0-4.fc38.src.rpm
> arbor-0.7-4.fc38.src.rpm
> auryn-0.8.2-15.fc38.src.rpm
> boost-1.78.0-11.fc38.src.rpm
> bout++-4.4.2-5.fc37.src.rpm
> cgnslib-4.3.0-6.fc38.src.rpm
> cgnslib-4.3.0-7.fc38.src.rpm
> coin-or-Ipopt-3.14.9-2.fc38.src.rpm
> combblas-1.6.2-0.15.beta2.fc37.src.rpm
> cp2k-2023.1-2.fc38.src.rpm
> dolfin-2019.1.0.post0-36.fc38.src.rpm
> elpa-2022.05.001-2.fc38.src.rpm
> fftw-3.3.10-3.fc37.src.rpm
> freefem++-4.12-2.fc38.src.rpm
> ga-5.7.2-13.fc38.src.rpm
> gmsh-4.11.1-3.fc38.src.rpm
> gpaw-22.8.0-5.fc38.src.rpm
> gretl-2022c-2.fc38.src.rpm
> h5py-3.7.0-4.fc38.src.rpm
> hdf5-1.12.1-11.fc38.src.rpm
> hpx-1.8.1-1.fc37.src.rpm
> hypre-2.24.0-3.fc37.src.rpm
> intel-mpi-benchmarks-2021.3-3.fc38.src.rpm
> lammps-20220623-3.fc38.src.rpm
> libcircle-0.3-12.fc38.src.rpm
> libneurosim-1.2.0-6.20210110.gitafc003f.fc38.src.rpm
> mathgl-8.0.1-2.fc38.src.rpm
> mpi4py-3.1.4-2.fc38.src.rpm
> MUMPS-5.5.1-1.fc38.src.rpm
> MUSIC-1.1.16-10.20201002git8c6b77a.fc38.src.rpm
> nest-3.3-1.fc38.src.rpm
> netcdf-4.9.0-5.fc38.src.rpm
> netcdf-cxx4-4.3.1-8.fc38.src.rpm
> netcdf-fortran-4.5.4-3.fc38.src.rpm
> netgen-mesher-6.2.2202-5.fc38.src.rpm
> neuron-8.0.2-6.fc38.src.rpm
> nwchem-7.0.2-12.fc38.src.rpm
> openmpi-4.1.4-8.fc38.src.rpm
> paraview-5.11.0-3.fc38.src.rpm
> petsc-3.17.4-7.fc38.src.rpm
> psblas3-3.8.0-3.fc37.src.rpm
> python-dijitso-2019.1.0-12.fc38.src.rpm
> python-ffc-2019.1.0.post0-11.fc38.src.rpm
> python-lfpy-2.2.6-6.fc38.src.rpm
> python-steps-3.6.0-27.fc38.src.rpm
> quantum-espresso-7.0-5.fc38.src.rpm
> scalapack-2.2.0-3.fc38.src.rpm
> scotch-6.1.2-3.fc37.src.rpm
> sundials2-2.7.0-12.fc38.src.rpm
> sundials-5.8.0-11.fc38.src.rpm
> superlu_dist-8.1.1-1.fc38.src.rpm
> vtk-9.2.5-2.fc38.src.rpm
>
> Personally I've been planning on dropping 32-bit support in a buch of
> packages I maintain in this stack like vtk, paraview, etc.  This seems
> like as good a driver for it as any.
>
> That said, packages that build serial and parallel versions don't need
> to drop 32-bit support completely, just for the openmpi builds.

I assume this update will only be pushed to rawhide when it's ready?
Then you should be fine dropping i686 support when that happens
(assuming that dependent packages get the same ExcludeArch treatment,
of course).
The only thing that's not OK as far as I know is dropping support for
architectures during the lifetime of a stable release.

You don't even need to file paperwork for excluding i686 anymore since
this happened:
https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval

Fabio
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