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IO factories in external module fails at configuration #5760
Description
Description
Trying to compile RTK externally after compiling the latest ITK main. I get the following error at configuration
CMake Error at /home/srit/src/itk/itk/CMake/ITKModuleMacros.cmake:429 (target_link_libraries):
Cannot specify link libraries for target "ITKImageIO" which is not built by
this project.
Call Stack (most recent call first):
/home/srit/src/itk/itk/CMake/ITKModuleExternal.cmake:202 (itk_module_impl)
CMakeLists.txt:258 (include)
This is likely caused by #5721.
Steps to Reproduce
Compile ITK.
Then download RTK and configure RTK separately.
Expected behavior
Configuration of the project.
Actual behavior
Fails with the above error
Reproducibility
100%
Versions
Latest ITK in the main branch, Ubuntu.
Activity
SimonRit commentedon Feb 3, 2026
Sorry @blowekamp, I don't know how to solve this...
blowekamp commentedon Feb 3, 2026
I only tested RTK when is was enabled as part of the ITK build. This is RTK built against a build directory of ITK?
SimonRit commentedon Feb 3, 2026
Yes exactly. And the problem disappears if I comment out the following lines
https://github.com/RTKConsortium/RTK/blob/main/itk-module.cmake#L53-L61
I just tested ITKIOScanco and there is the same problem so it's probably preferable to use this as a smaller test.
SimonRit commentedon Feb 5, 2026
Fixed by #5763.