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include
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-------
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Load and run CMake code from a file or module.
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::
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include(<file|module> [OPTIONAL] [RESULT_VARIABLE <VAR>]
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[NO_POLICY_SCOPE])
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Load and run CMake code from the file given. Variable reads and
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writes access the scope of the caller (dynamic scoping). If ``OPTIONAL``
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is present, then no error is raised if the file does not exist. If
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``RESULT_VARIABLE`` is given the variable will be set to the full filename
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which has been included or NOTFOUND if it failed.
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If a module is specified instead of a file, the file with name
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``<modulename>.cmake`` is searched first in :variable:`CMAKE_MODULE_PATH`,
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then in the CMake module directory. There is one exception to this: if
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the file which calls ``include()`` is located itself in the CMake builtin
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module directory, then first the CMake builtin module directory is searched and
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:variable:`CMAKE_MODULE_PATH` afterwards. See also policy :policy:`CMP0017`.
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See the :command:`cmake_policy` command documentation for discussion of the
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``NO_POLICY_SCOPE`` option.
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