v5.0.x: fortran: fix common symbol sizes and alignments #13240
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with mpif-h and usempi, MPI constants (e.g. MPI_COMM_WORLD) are all parts of a unique common block. Fortran compilers generally have alignment requirements for these (16 with gfortran, 32 with ifort or 64 with nvfortran to name a few), so pass these requirements to the actual symbols that are defined in the C code to make pick linkers (e.g. ubuntu) happy pandas. Such linkers also complain about the size of MPI_STATUS, so define these are arrays intead of pointer. Refs open-mpi#13043 Thanks MJ Rutter for the report back-ported from ec2b164 :bot:notacherrypick Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
jsquyres
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jsquyres
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May 8, 2025
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with mpif-h and usempi, MPI constants (e.g. MPI_COMM_WORLD) are all parts of a unique common block. Fortran compilers generally have alignment requirements for these (16 with gfortran, 32 with ifort or 64 with nvfortran to name a few), so pass these requirements to the actual symbols that are defined in the C code to make pick linkers (e.g. ubuntu) happy pandas. Such linkers also complain about the size of MPI_STATUS, so define these are arrays intead of pointer.
Fixes #13043
Thanks MJ Rutter for the report
back-ported from ec2b164
:bot:notacherrypick