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The CMake variable :variable:`CMAKE_FIND_ROOT_PATH` specifies one or more directories to be prepended to all other search directories. This effectively "re-roots" the entire search under given locations. Paths which are descendants of the :variable:`CMAKE_STAGING_PREFIX` are excluded from this re-rooting, because that variable is always a path on the host system. By default the :variable:`CMAKE_FIND_ROOT_PATH` is empty. The :variable:`CMAKE_SYSROOT` variable can also be used to specify exactly one directory to use as a prefix. Setting :variable:`CMAKE_SYSROOT` also has other effects. See the documentation for that variable for more. These variables are especially useful when cross-compiling to point to the root directory of the target environment and CMake will search there too. By default at first the directories listed in :variable:`CMAKE_FIND_ROOT_PATH` are searched, then the :variable:`CMAKE_SYSROOT` directory is searched, and then the non-rooted directories will be searched. The default behavior can be adjusted by setting |CMAKE_FIND_ROOT_PATH_MODE_XXX|. This behavior can be manually overridden on a per-call basis using options: ``CMAKE_FIND_ROOT_PATH_BOTH`` Search in the order described above. ``NO_CMAKE_FIND_ROOT_PATH`` Do not use the :variable:`CMAKE_FIND_ROOT_PATH` variable. ``ONLY_CMAKE_FIND_ROOT_PATH`` Search only the re-rooted directories and directories below :variable:`CMAKE_STAGING_PREFIX`.