nothing. i programmed something like a gui wrapper-class-framework with i am using to compile my projects on linux. its fully based on c++ and gtk. i wrapped the entire gui-set by specific classes and functions so that i don't use directly gtk while coding a gui-app.
it's similar to wxwigdets. but own stuff. now i decided to port it on haiku. i have some tools and a big project written with that small framework and i want to port them all without any changes or maximum few changes to haiku. therefore i need re-code all the classes that are specific to handle gtk into the haiku counterparts.
paladin seems to be unnecessarily complicated to use in that case for me. I am used to working with terminal based compilation.