At the moment all the applications using wxWidegts have to be build against GTK 2 because wxWidegts is build --with-gtk=2.
At a time there were issues to build it with gtk-3 6552ef19336e but quite a while ago it was working fine again D603
Wouldn't it be a good idea to add this point in the to-do list (checking if all applications using wxwidgets are gtk-3 compliant and if so rebuild them all against this toolkit) ?