| CMP0027
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| Conditionally linked imported targets with missing include directories.
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| CMake 2.8.11 introduced introduced the concept of
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| :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES`, and a check at cmake time that the
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| entries in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of an ``IMPORTED``
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| target actually exist. CMake 2.8.11 also introduced generator expression
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| support in the :command:`target_link_libraries` command. However, if an
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| imported target is linked as a result of a generator expression evaluation, the
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| entries in the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of that target were not
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| checked for existence as they should be.
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| The ``OLD`` behavior of this policy is to report a warning if an entry in
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| the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of a generator-expression
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| conditionally linked ``IMPORTED`` target does not exist.
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| The ``NEW`` behavior of this policy is to report an error if an entry in
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| the :prop_tgt:`INTERFACE_INCLUDE_DIRECTORIES` of a generator-expression
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| conditionally linked ``IMPORTED`` target does not exist.
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| .. |INTRODUCED_IN_CMAKE_VERSION| replace:: 3.0
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| .. |WARNS_OR_DOES_NOT_WARN| replace:: warns
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| .. include:: STANDARD_ADVICE.txt
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| .. include:: DEPRECATED.txt
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