;-list of root paths to search on the filesystem.
This variable is most useful when cross-compiling. CMake uses the paths in this list as alternative roots to find filesystem items with find_package(), find_library() etc.
© 2000–2016 Kitware, Inc.
© 2000–2011 Insight Software Consortium
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.7/variable/CMAKE_FIND_ROOT_PATH.html