LightDM - Aug 2012 - How to get g_debug() output for lightdm-gtk-greeter

I have been searching for hours on how to enable debug output from
lightdm-gtk-greeter and have not been able to find a solution. I am
building and installing my custom lightdm-gtk-greeter with makepkg on
archlinux and the greeters log output is correctly being sent to
~/.cache/lightdm/log/x-1-greeter.log, but there is no output from
g_debug(). There are previous g_debug() statements in the source already,
but I cannot get them to work. I am running "lightdm -d --test-debug".
I
have tried compiling with "--enable-debug" and "-DDEBUG" but
nothing works.
I have also tried setting $G_DEBUG and $G_MESSAGES_DEBUG to no avail.

Also, is there a quick and easy workflow for the development of greeters?
It seems I have to do a full install to test it.

Thank you.
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