PRIVATE_HEADER

Specify private header files in a :prop_tgt:FRAMEWORK shared library target.

Shared library targets marked with the :prop_tgt:FRAMEWORK property generate frameworks on macOS, iOS and normal shared libraries on other platforms. This property may be set to a list of header files to be placed in the PrivateHeaders directory inside the framework folder. On non-Apple platforms these headers may be installed using the PRIVATE_HEADER option to the :command:install(TARGETS) command.