Building gtkmm on Windows

[Damon Register <damon w register lmco com>]

Has anyone (other than the the creators of the gtkmm bundle) tried building
gtkmm on Windows using the procdure given here?
http://live.gnome.org/gtkmm/MSWindows/BuildingGtkmm

I am having trouble with the gtkmm installer.  The gtkmm bundle provided by
this installer  may be (not sure) broken.  The pixbufloaders seem to be
missing so I thought I might try building the bundle in an effort to see
why the loaders are missing.

I obtained the GTK+ all-in-one bundle in accordance with the build instructions.
libsigc++ builds with no trouble using the suggested
./configure && make && make install

Make fails for glibmm with

generate_defs_gio.cc:23:34: gio/gunixinputstream.h: No such file or directory
generate_defs_gio.cc:24:35: gio/gunixoutputstream.h: No such file or directory

I notice on
http://library.gnome.org/devel/gio/stable/GUnixInputStream.html
Note that <gio/gunixinputstream.h> belongs to the UNIX-specific GIO interfaces,
thus you have to use the gio-unix-2.0.pc pkg-config file when using it.
Something isn't right here?  Why should it be building with unix parts?

So I guess my question is this:  is something broken in the bundle or glibmm, or
is there some detail left out of the build instructions?

Damon Register