[CMake] include_directories SYSTEM and they propagation to target

[Roman Savchenko]

HI all,

I will appreciate if you could help me with one question.

>From manual:

*include_directories:*

*They are also added to the INCLUDE_DIRECTORIES
<https://cmake.org/cmake/help/v3.5/prop_tgt/INCLUDE_DIRECTORIES.html#prop_tgt:INCLUDE_DIRECTORIES>
target property for each target in the current CMakeLists file.*

and *INTERFACE_SYSTEM_INCLUDE_DIRECTORIES:*

* Targets may populate this property to publish the include directories
which contain system headers, and therefore should not result in compiler
warnings. *

Does it mean that include_directories(SYSTEM ${PATH}) will be populated to
INTERFACE_SYSTEM_INCLUDE_DIRECTORIES ?

Regards,
Roman
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