CMAKE_NO_SYSTEM_FROM_IMPORTED
Default value for NO_SYSTEM_FROM_IMPORTED of targets.
This variable is used to initialize the NO_SYSTEM_FROM_IMPORTED property on all the targets. See that target property for additional information.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.6/variable/CMAKE_NO_SYSTEM_FROM_IMPORTED.html