if gcc -DHAVE_CONFIG_H -DPREFIX=\"/opt/gnome2\" -DSYSCONFDIR=\"/etc/X11\" -DDATADIR=\"/opt/gnome2/share\" -DLIBDIR=\"/opt/gnome2/lib\" -DGDM_FACTORY_CONFIG_FILE=\"/etc/X11/gdm/factory-gdm.conf\" -DGDM_SYSCONFDIR_CONFIG_FILE=\"/etc/X11/gdm/gdm.conf\" -DGDM_GLADE_DIR=\"/opt/gnome2/share/gdm\" -I. -I. -I.. -I. -I.. -I../daemon -I../vicious-extensions -DGNOMELOCALEDIR=\""/opt/gnome2/share/locale"\" -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/libglade-2.0 -I/usr/include/libxml2      -march=pentium-m -mtune=pentium-m -O3 -ffast-math -mfpmath=sse -msse2 -fomit-frame-pointer -pipe -ftracer -Wall -Wmissing-prototypes  -MT gdmwm.o -MD -MP -MF ".deps/gdmwm.Tpo" -c -o gdmwm.o gdmwm.c; \
        then mv -f ".deps/gdmwm.Tpo" ".deps/gdmwm.Po"; else rm -f ".deps/gdmwm.Tpo"; exit 1; fi
In file included from gdmwm.c:38:
gdmcommon.h:35: error: format string argument not a string type

Line 35 is:

33 void      gdm_common_fail                   (int exitstatus,
34                                             const gchar *format, ...)
35                                             G_GNUC_PRINTF (1, 2);

I've gcc 4.0.3 (debian sid). This are my compiling options:

--disable-static        \
--prefix=/opt/gnome2    \
--sysconfdir=/etc/X11   \
--localstatedir=/var    \
--enable-ipv6=yes