The sorting direction used by CMAKE_FIND_PACKAGE_SORT_ORDER. It can assume one of the following values:
DEC ASC If CMAKE_FIND_PACKAGE_SORT_ORDER is not set or is set to NONE this variable has no effect.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.7/variable/CMAKE_FIND_PACKAGE_SORT_DIRECTION.html