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+CMAKE_SYSROOT
+-------------
+
+Path to pass to the compiler in the ``--sysroot`` flag.
+
+The ``CMAKE_SYSROOT`` content is passed to the compiler in the ``--sysroot``
+flag, if supported. The path is also stripped from the RPATH/RUNPATH if
+necessary on installation. The ``CMAKE_SYSROOT`` is also used to prefix
+paths searched by the ``find_*`` commands.
+
+This variable may only be set in a toolchain file specified by
+the :variable:`CMAKE_TOOLCHAIN_FILE` variable.