1The CMake variable :variable:`CMAKE_FIND_ROOT_PATH` specifies one or more 2directories to be prepended to all other search directories. This 3effectively "re-roots" the entire search under given locations. 4Paths which are descendants of the :variable:`CMAKE_STAGING_PREFIX` are excluded 5from this re-rooting, because that variable is always a path on the host system. 6By default the :variable:`CMAKE_FIND_ROOT_PATH` is empty. 7 8The :variable:`CMAKE_SYSROOT` variable can also be used to specify exactly one 9directory to use as a prefix. Setting :variable:`CMAKE_SYSROOT` also has other 10effects. See the documentation for that variable for more. 11 12These variables are especially useful when cross-compiling to 13point to the root directory of the target environment and CMake will 14search there too. By default at first the directories listed in 15:variable:`CMAKE_FIND_ROOT_PATH` are searched, then the :variable:`CMAKE_SYSROOT` 16directory is searched, and then the non-rooted directories will be 17searched. The default behavior can be adjusted by setting 18|CMAKE_FIND_ROOT_PATH_MODE_XXX|. This behavior can be manually 19overridden on a per-call basis using options: 20 21``CMAKE_FIND_ROOT_PATH_BOTH`` 22 Search in the order described above. 23 24``NO_CMAKE_FIND_ROOT_PATH`` 25 Do not use the :variable:`CMAKE_FIND_ROOT_PATH` variable. 26 27``ONLY_CMAKE_FIND_ROOT_PATH`` 28 Search only the re-rooted directories and directories below 29 :variable:`CMAKE_STAGING_PREFIX`. 30