Automatically add the current source and build directories to the INTERFACE_INCLUDE_DIRECTORIES target property.
If this variable is enabled, CMake automatically adds for each shared library target, static library target, module target and executable target, CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_BINARY_DIR to the INTERFACE_INCLUDE_DIRECTORIES target property. By default CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE is OFF.
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https://cmake.org/cmake/help/v3.19/variable/CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE.html