* gtkplus: set XDG_DATA_DIRS
* shared-mime-info: database of common MIME types
* gtkplus: needs shared-mime-info for correct handling of stock icons
* shared-mime-info: builds with newer intltool than provided by some platforms
* atk: set XDG_DATA_DIRS at run-time
* gdk-pixbuf: set XDG_DATA_DIRS at run-time
* gtkplus: set XDG_DATA_DIRS at run-time
* pango: set XDG_DATA_DIRS at run-time
* shared-mime-info: set XDG_DATA_DIRS at run-time
