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- INTERFACE_SYSTEM_INCLUDE_DIRECTORIES
- ------------------------------------
- List of public system include directories for a library.
- Targets may populate this property to publish the include directories
- which contain system headers, and therefore should not result in
- compiler warnings. The :command:`target_include_directories(SYSTEM)`
- command signature populates this property with values given to the
- ``PUBLIC`` and ``INTERFACE`` keywords.
- Projects may also get and set the property directly, but must be aware that
- adding directories to this property does not make those directories used
- during compilation. Adding directories to this property marks directories
- as ``SYSTEM`` which otherwise would be used in a non-``SYSTEM`` manner. This
- can appear similar to 'duplication', so prefer the
- high-level :command:`target_include_directories(SYSTEM)` command and avoid
- setting the property by low-level means.
- When target dependencies are specified using :command:`target_link_libraries`,
- CMake will read this property from all target dependencies to mark the
- same include directories as containing system headers.
- Contents of ``INTERFACE_SYSTEM_INCLUDE_DIRECTORIES`` may use "generator
- expressions" with the syntax ``$<...>``. See the
- :manual:`cmake-generator-expressions(7)` manual for available expressions.
- See the :manual:`cmake-buildsystem(7)` manual for more on defining
- buildsystem properties.
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