Thank you for the bug report.
After some investigation we found out this is due to a change in the
latest ITK and VTK packages that now require HDF5 in two incompatible ways.
ITK uses the standard path of FindHDF5.cmake, VTK a custom patch based
on an older version.
/usr/lib/x86_64-linux-gnu/cmake/vtk-9.6/patches/99/FindHDF5.cmake
/usr/share/cmake-4.3/Modules/FindHDF5.cmake
A minimal CMakeLists.txt file can reproduce the issue without camitk:
cmake_minimum_required(VERSION 3.28)
project(HDF5Issue)
# FIX: find_package(HDF5 COMPONENTS C HL)
find_package(VTK REQUIRED COMPONENTS CommonCore)
find_package(ITK REQUIRED)
Calling "cmake -S . -B build" in the directory containing this file will show
the conflict.
Bug #1147167 has been posted to VTK9 package to explain the issue in more
detail : https://bugs.debian.org/1147167
A workaround is being implemented as a patch to the package but there are still
some issues with it that will hopefully be resolved soon.
M%anik Bhattacharjee
