CMake: Add 'collect_targets' mode to __qt_internal_walk_libs

Allow collecting all public dependency CMake targets starting from
a given initial target.

The new mode walks INTERFACE_LINK_LIBRARIES of a shared library
or executable target, as well as the INTERFACE_LINK_LIBRARIES and
LINK_LIBRARIES of a static library target.
Each encountered target (checked with if(TARGET)) is added the output
list.

Note that the private dependencies of a non-static target (like a
shared library or executable) are not walked by the new mode.

Introduce a new function called
__qt_internal_collect_all_target_dependencies which uses the new
mode to collect the full private dependency list of a target.

The final list only contains targets, so no linker flags or file
paths.
This list is useful to do further processing on the targets like
extracting properties from them and running finalizers.

Task-number: QTBUG-92933
Change-Id: I5d96cfa05722d65e2248a344a4f2b0f98a992817
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

0 files changed, 0 insertions, 0 deletions