Yeah, I forgot to list SDL.tcz in the dep file, will do that. But I am not sure that SDL is really required, I will check on that.
The characters show up on my full install, but as you have observed they do not show up with a 'base norestore' boot. I will pinpoint the missing dependency, it right now eludes me, and it is not the dejavu fonts or the ttf-bitstream vera, but I will find it. I used ldd to determine the deps in a rush, and it came back to bite me.
The development extensions will help me or anyone else to quickly rebuild netsurf, so that is their main and only purpose, a time saver.
The framebuffer would be nice, and I am interested in realizing it. Perhaps a 'netsurf-common' extension for common files, and a netsurf.tcz and netsurf-gtk.tcz for the build targets. I think that the framebuffer and the X version require about the same deps, while the gtk target obviously requires more.