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