AUTOGEN_TARGET_DEPENDS
----------------------

Target dependencies of the corresponding ``_automoc`` target.

Targets which have their :prop_tgt:`AUTOMOC` target set to true have a
corresponding ``_automoc`` target which is used to autogenerate generate moc
files.  As this ``_automoc`` target is created at generate-time, it is not
possible to define dependencies of it, such as to create inputs for the moc
executable.

The ``AUTOGEN_TARGET_DEPENDS`` target can be set instead to a list of dependencies
for the ``_automoc`` target. The buildsystem will be generated to depend on its
contents.