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+CMAKE_ADSP_ROOT
+---------------
+
+When :ref:`Cross Compiling for ADSP SHARC/Blackfin`,
+this variable holds the absolute path to the latest CCES or VDSP++ install.
+The directory is expected to contain the ``cc21k.exe`` and ``ccblkfn.exe`` compilers.
+This will be set automatically if a default install of CCES or VDSP++ can be found.
+
+See also the :envvar:`ADSP_ROOT` environment variable.