Really strange error

[LWATCDR <lwatcdr gmail com>]

I can not seem to build anything after I updated to KDE 3.5 in SuSE 9.3.
I know that makes no sence at all but every one of my programs now gets a compile error in the GTK header files.

**** Incremental build of configuration Debug for project GTKBox ****

make -k all 
Building file: ../packbox.c
Invoking: GCC C Compiler
gcc -I/opt/gnome/include/gtk-2.0/ -O2 -Wall -c -fmessage-length=0 -DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API -I/opt/gnome/include/gtk-2.0 -I/opt/gnome/lib/gtk-
2.0/include -I/usr/X11R6/include -I/opt/gnome/include/atk-1.0 -I/opt/gnome/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/freetype2/config -I/opt/gnome/include/glib-2.0 -I/opt/gnome/lib/glib-2.0/include -opackbox.o
 ../packbox.c
In file included from /opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf.h:33,
                 from /opt/gnome/include/gtk-2.0/gdk/gdkcursor.h:5,
                 from /opt/gnome/include/gtk-2.0/gdk/gdk.h:31,
                 from /opt/gnome/include/gtk-2.0/gtk/gtk.h:31,
                 from ../packbox.c:5:
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:163: error: syntax error before "G_GNUC_SENTINEL"
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:163: warning: type defaults to `int' in declaration of `G_GNUC_SENTINEL'
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:163: warning: data definition has no type or storage class
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:184: error: syntax error before "G_GNUC_SENTINEL"
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:184: warning: type defaults to `int' in declaration of `G_GNUC_SENTINEL'
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:184: warning: data definition has no type or storage class
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:201: error: syntax error before "G_GNUC_SENTINEL"
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:201: warning: type defaults to `int' in declaration of `G_GNUC_SENTINEL'
/opt/gnome/include/gtk-2.0/gdk-pixbuf/gdk-pixbuf-core.h:201: warning: data definition has no type or storage class