Comment 4 for bug 510610

That's true, at least as far as I know.

To generate the bindings I created the two required files (.files and .namespace), then used the commands vala-gen-introspection and vapigen, the first one looking for the installed .pc pkgconfig file.
Also, then I had to fix something by hand in the generated .vapi file because sometimes the extraction engine gets lost within namespace, class and function names. (e.g. the AppIndicator class had no name)

So I don't think it's possible to automatically generate 100%-working bindings.
(anyway we won't need this anymore once gobject introspection is working, they say)