Yeah, exactly. It is automate that and the result can be stored as "init" methods (one per platform) in the shared pools directly. 

Also, it will take care of initializing them (searching the correct init method for the current platform) at startup.

Note that I called the project FFICHeaderExtractor and not FFICConstantsExtractor. If time allows, I would also like to get info from structs: sizeof and how they are defined internally. That would be yet another feature to let more things to be done via FFI. See https://github.com/marianopeck/FFICHeaderExtractor/issues/1  But that would require some more effort!