Complex bug with recursive git_subprojects and system packge installed about cmake

[tribal-tec]

Deflect does not properly declare Qt5Quick as a dependency; it misses

set(DEFLECT_DEPENDENT_LIBRARIES Qt5Quick)

somewhere before include(CommonPackageConfig) to resolved the Qt5::Quick target.

[rdumusc]

This indeed fixes the problem, thanks a lot. Strange that you need such a complex setup to observe the problem. One important detail is to use the package name (Qt5Quick) instead of the target name (Qt5::Quick) like in set(DEFLECTQT_LINK_LIBRARIES PUBLIC).

[tribal-tec]

Maybe there's a spot to document this better. If a target is 'leaking', the corresponding find_dependency(...) call in the ProjectConfig.cmake has to be added via PROJECT_DEPENDENT_LIBRARIES so that CMake finds the target. Not needed in a super/subproject setup.

[rdumusc]

Something like this, yes, maybe in the readme.md so that people don't miss it.
We could also find a more precise name for the variable. It is not really LIBRARIES or target but its corresponding package name for find_package.