Help: Document SYSTEM treatment of IMPORTED target INTERFACE_INCLUDE_DIRS
Document how the behavior can be controlled.
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@ -602,6 +602,14 @@ This is equivalent to appending ``${CMAKE_INSTALL_PREFIX}/include`` to the
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:prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of each of the installed
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:prop_tgt:`IMPORTED` targets when generated by :command:`install(EXPORT)`.
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When the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of an
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:ref:`imported target <Imported targets>` is consumed, the entries in the
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property are treated as ``SYSTEM`` include directories, as if they were
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listed in the :prop_tgt:`INTERFACE_SYSTEM_INCLUDE_DIRECTORIES` of the
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dependency. This can result in omission of compiler warnings for headers
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found in those directories. This behavior for :ref:`imported targets` may
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be controlled with the :prop_tgt:`NO_SYSTEM_FROM_IMPORTED` target property.
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If a binary target is linked transitively to a Mac OX framework, the
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``Headers`` directory of the framework is also treated as a usage requirement.
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This has the same effect as passing the framework directory as an include
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