title: Are there any tools to migrate the interface from legacy GTK applications to a modern GTK Builder based application
body: <p>I'm responsible for a number of legacy C based GTK applications which are starting to show their age. I'm toying with the idea of re-implementing some of them in a more modern framework. Are there any tools which can help migrate a hand-built C based GTK interface into a GTK Builder based XML interface description? My aim would be to separate the interface definition from the actual app implementation.</p>
  
  <p>I suspect it might be possible to ltrace an app and re-build the interface from the GTK library calls but if someone has already solved the problem I'm happy not to re-invent the wheel.</p>