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CXX_SCAN_FOR_MODULES
--------------------
.. versionadded:: 3.26
``CXX_SCAN_FOR_MODULES`` is a boolean specifying whether CMake will scan the
source for C++ module dependencies. See also the
:prop_tgt:`CXX_SCAN_FOR_MODULES` for target-wide settings.
When this property is set ``ON``, CMake will scan the source at build time and
add module dependency information to the compile line as necessary. When this
property is set ``OFF``, CMake will not scan the source at build time. When
this property is unset, the :prop_tgt:`CXX_SCAN_FOR_MODULES` property is
consulted.
Note that scanning is only performed if C++20 or higher is enabled for the
target and the source uses the ``CXX`` language. Scanning for modules in
sources belonging to file sets of type ``CXX_MODULES`` and
``CXX_MODULES_HEADER_UNITS`` is always performed.
.. note ::
This setting is meaningful only when experimental support for C++ modules
has been enabled by the ``CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API`` gate.
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