conditional docs

[Stefan Kost <ensonic hora-obscura de>]

hi,

I have an issue with building docs for conditional parts. E.g. some  
gobject will not be build, if some dependency is not meet or they are  
disabled. This will fail in the gtkkdoc-scanobj step. It would be fine  
for me if the GObject introspection stuff is missing in the resulting  
docs. In theory the whole section for this object would need to be  
ommitted, which is tricky (there can be links and so on).

Maybe an note in the page of that object which tells that this has  
been disabled in this build would be good.

Has anyone attempt to do this, any ideas or comments?

Stefan