macport build failing on foocanvas

[mybuyer at roadrunner.com]

Trying to install gnucash using MacPorts. Had an earlier version  
installed and running under Quartz on Leopard, removed macports (the  
whole /opt tree and launchd), reinstalled macports, then tried to  
install gnucash 2.2.9_1.

So far it gets to goffice-0.6.6 and has this error:

foo-canvas-rect-ellipse.c:45:22: error: gdk/gdkx.h: No such file or  
directory


Where does this file come from?