CMAKE_FIND_ROOT_PATH
Semicolon-separated 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.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.15/variable/CMAKE_FIND_ROOT_PATH.html