| 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. |
