[Vala] Fwd: Debug logging

[Sam Thursfield <sam thursfield codethink co uk>]

Hi

Has anyone yet solved the problem of how to access macro-based C library 
logging systems from Vala? This is important when writing plugins for 
libraries like Grilo, GStreamer and even GLib-based libraries.

The problem is that defining log domains/categories is generally done 
with C macros. Is the only solution to actually build some level of log 
support into Vala itself, so that the .vapi file could define how to set 
a log domain and the namespace could have a [LogDomain "Foo"] attribute 
or some such?

I notice in gstreamer-0.10.vapi there is a DebugCategory class wrapping 
the macros to generate a log category and output messages in that 
category. There doesn't seem to be any way to use it, however, because 
there's no way to construct a DebugCategory instance.

Thanks
Sam