Please find attached a new build system for applications making use of
glib or gtk+.
It uses wrappers as previously discussed on this list.

I've successfully tested it with three packages: emacs, libcanberra and gtk+.

Currently it is implemented as a separate build-system inheriting from
the gnu-build-system. Essentially it adds 2 phases to the latter.
IMO, it would make sense to make those 2 phases part of the
gnu-build-system and enable them with the help of flags.

Regards,
Fede