CMAKE_FASTBUILD_SOURCE_MAPPING
------------------------------

.. versionadded:: 4.2

Sets FASTBuild's ``SourceMapping_Experimental`` option.

Example:

.. code-block:: cmake

   set(CMAKE_FASTBUILD_SOURCE_MAPPING "/another/root")

See the `FASTBuild Compiler() documentation <https://www.fastbuild.org/docs/functions/compiler.html>`_
for more information.