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39 lines
1.6 KiB
39 lines
1.6 KiB
5 years ago
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AUTOGEN_ORIGIN_DEPENDS
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----------------------
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Switch for forwarding origin target dependencies to the corresponding
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``_autogen`` target.
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Targets which have their :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC` property
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``ON`` have a corresponding ``_autogen`` target which generates
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``moc`` and ``uic`` files. As this ``_autogen`` target is created at
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generate-time, it is not possible to define dependencies of it using
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e.g. :command:`add_dependencies`. Instead the
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:prop_tgt:`AUTOGEN_ORIGIN_DEPENDS` target property decides whether the origin
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target dependencies should be forwarded to the ``_autogen`` target or not.
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By default :prop_tgt:`AUTOGEN_ORIGIN_DEPENDS` is initialized from
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:variable:`CMAKE_AUTOGEN_ORIGIN_DEPENDS` which is ``ON`` by default.
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In total the dependencies of the ``_autogen`` target are composed from
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- forwarded origin target dependencies
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(enabled by default via :prop_tgt:`AUTOGEN_ORIGIN_DEPENDS`)
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- additional user defined dependencies from :prop_tgt:`AUTOGEN_TARGET_DEPENDS`
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See the :manual:`cmake-qt(7)` manual for more information on using CMake
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with Qt.
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Note
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^^^^
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Disabling :prop_tgt:`AUTOGEN_ORIGIN_DEPENDS` is useful to avoid building of
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origin target dependencies when building the ``_autogen`` target only.
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This is especially interesting when a
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:variable:`global autogen target <CMAKE_GLOBAL_AUTOGEN_TARGET>` is enabled.
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When the ``_autogen`` target doesn't require all the origin target's
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dependencies, and :prop_tgt:`AUTOGEN_ORIGIN_DEPENDS` is disabled, it might be
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necessary to extend :prop_tgt:`AUTOGEN_TARGET_DEPENDS` to add missing
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dependencies.
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