gubi compile problems

["M. Rosencrantz" <mjrose u washington edu>]

I am trying to compile the latest gubi release but I keep getting the
folloing errors:

In file included from gtkext.c:25:
/usr/local/include/gdk/gdkprivate.h:22: X11/Xlib.h: No such file or
directory
/usr/local/include/gdk/gdkprivate.h:23: X11/Xutil.h: No such file or
directory
In file included from gtkext.c:25:
/usr/local/include/gdk/gdkprivate.h:51: parse error before `Window'
/usr/local/include/gdk/gdkprivate.h:51: warning: no semicolon at end of
struct or union
/usr/local/include/gdk/gdkprivate.h:52: warning: data definition has no
type or storage class
/usr/local/include/gdk/gdkprivate.h:62: parse error before `}'
/usr/local/include/gdk/gdkprivate.h:67: parse error before `XImage'
/usr/local/include/gdk/gdkprivate.h:67: warning: no semicolon at end of
struct or union
/usr/local/include/gdk/gdkprivate.h:68: warning: data definition has no
type or storage class
/usr/local/include/gdk/gdkprivate.h:80: parse error before `}'
/usr/local/include/gdk/gdkprivate.h:85: parse error before `GC'
/usr/local/include/gdk/gdkprivate.h:85: warning: no semicolon at end of
struct or union
/usr/local/include/gdk/gdkprivate.h:86: warning: data definition has no
type or storage class
/usr/local/include/gdk/gdkprivate.h:87: parse error before `}'

There is actually a much longer list than this but you get the idea.

any ideas?

thanks
-Matt Rosencrantz