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49 lines
1.9 KiB
49 lines
1.9 KiB
AUTOGEN_ORIGIN_DEPENDS
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----------------------
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.. versionadded:: 3.14
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Switch for forwarding origin target dependencies to the corresponding
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:ref:`<ORIGIN>_autogen` target.
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.. note::
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If Qt 5.15 or later is used and the generator is either :generator:`Ninja`
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or :ref:`Makefile Generators`, origin target dependencies are forwarded to
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the :ref:`<ORIGIN>_autogen_timestamp_deps` target instead of
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:ref:`<ORIGIN>_autogen`
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Targets which have their :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC` property
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``ON`` have a corresponding :ref:`<ORIGIN>_autogen` target which generates
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``moc`` and ``uic`` files. As this :ref:`<ORIGIN>_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 ``AUTOGEN_ORIGIN_DEPENDS``
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target property decides whether the origin target dependencies should be
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forwarded to the :ref:`<ORIGIN>_autogen` target or not.
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By default ``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 :ref:`<ORIGIN>_autogen` target are composed
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from
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- forwarded origin target dependencies
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(enabled by default via ``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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Disabling ``AUTOGEN_ORIGIN_DEPENDS`` is useful to avoid building of
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origin target dependencies when building the :ref:`<ORIGIN>_autogen` target
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only. 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 :ref:`<ORIGIN>_autogen` target doesn't require all the origin target's
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dependencies, and ``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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