[Discussion] Should PCL search for dependencies again during CMake import in a project using PCL?

[kunaltyagi]

Started from @mvieth's comment in #5065 cc: @larshg

[kunaltyagi]

My thought process: The info should be same as build time because of API and ABI changes that might happen otherwise. Eg:

• Find vtk-7 during build and install pcl
• Someone installs vtk-8 (and maybe remove vtk-7)
• Build project using PCL
• Clearly, PCL should try to find VTK-7, not VTK-8 since the internal logic is dependent on the version used to build

My current stance: No (but it should change to be the best option for downstream users)