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get_directory_property
----------------------
Get a property of ``DIRECTORY`` scope.
.. code-block:: cmake
get_directory_property(<variable> [DIRECTORY <dir>] <prop-name>)
Stores a property of directory scope in the named ``<variable>``.
The ``DIRECTORY`` argument specifies another directory from which
to retrieve the property value instead of the current directory.
Relative paths are treated as relative to the
current source directory. CMake must already know about the directory,
either by having added it through a call to :command:`add_subdirectory`
or being the top level directory.
.. versionadded:: 3.19
``<dir>`` may reference a binary directory.
If the property is not defined for the nominated directory scope,
an empty string is returned. In the case of ``INHERITED`` properties,
if the property is not found for the nominated directory scope,
the search will chain to a parent scope as described for the
:command:`define_property` command.
.. code-block:: cmake
get_directory_property(<variable> [DIRECTORY <dir>]
DEFINITION <var-name>)
Get a variable definition from a directory. This form is useful to
get a variable definition from another directory.
See also the more general :command:`get_property` command.