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fix CMake not finding MPI #179

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fix CMake not finding MPI #179

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@s-ol
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@s-ol s-ol commented Aug 18, 2025

Building OCP 7.8.1.2 on Arch Linux against vtk 9.5.0 currently fails in the CMake Configuration stage:

CMake Error at /usr/lib/cmake/vtk/VTK-targets.cmake:1897 (set_target_properties):
  The link interface of target "VTK::mpi" contains:

    MPI::MPI_C

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

Call Stack (most recent call first):
  /usr/lib/cmake/vtk/vtk-config.cmake:147 (include)
  CMakeLists.txt:8 (find_package)

This patch adds mpi to the VTK components to search for, resolving this issue.

@adam-urbanczyk
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adam-urbanczyk commented Aug 19, 2025

Does fail CI, so not mergable as-is.

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@s-ol @adam-urbanczyk