* (gtkgen)
  how can GSList be represented as an Objective-C Object? (GTKButtonGroup?)

* (GTK.m)
  improve support for user interface builders (glade?)

* (GTKApplication.m)
  improve modal dialog (use GTKButtonBox?)

* (GTK.m)
  try GtkArg? (gtk_object_newv)

* (gtk-tool.make)
  support cross-compiling with the GNUstep makefile package

* (Makefile.os2)
  test makefiles on OS/2 (does libtool work on OS/2?)
  the OS/2 makefile is very outdated and may no longer work...

