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CMP0051
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-------
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.. versionadded:: 3.1
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List :genex:`TARGET_OBJECTS` in SOURCES target property.
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CMake 3.0 and lower did not include the ``TARGET_OBJECTS``
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:manual:`generator expression <cmake-generator-expressions(7)>` when
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returning the :prop_tgt:`SOURCES` target property.
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Configure-time CMake code is not able to handle generator expressions. If
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using the :prop_tgt:`SOURCES` target property at configure time, it may be
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necessary to first remove generator expressions using the
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:command:`string(GENEX_STRIP)` command. Generate-time CMake code such as
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:command:`file(GENERATE)` can handle the content without stripping.
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The ``OLD`` behavior for this policy is to omit ``TARGET_OBJECTS``
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expressions from the :prop_tgt:`SOURCES` target property. The ``NEW``
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behavior for this policy is to include ``TARGET_OBJECTS`` expressions
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in the output.
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This policy was introduced in CMake version 3.1.
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CMake version |release| warns when the policy is not set and uses
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``OLD`` behavior. Use the :command:`cmake_policy` command to set it
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to ``OLD`` or ``NEW`` explicitly.
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.. include:: DEPRECATED.txt
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