Do not treat include directories from the interfaces of consumed Imported Targets as SYSTEM.
The contents of the INTERFACE_INCLUDE_DIRECTORIES target property of imported targets are treated as SYSTEM includes by default. If this property is enabled on a target, compilation of sources in that target will not treat the contents of the INTERFACE_INCLUDE_DIRECTORIES of consumed imported targets as system includes.
This property is initialized by the value of the CMAKE_NO_SYSTEM_FROM_IMPORTED variable if it is set when a target is created.
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https://cmake.org/cmake/help/v3.19/prop_tgt/NO_SYSTEM_FROM_IMPORTED.html