Development setup question

[Jeff Lindholm]

Ok I thought I installed the development packages like the FAQ even
said.

But when attempting to build Qt I get the following...........

kernel/qt_x11_p.h:66:22: X11/Xlib.h: No such file or directory
kernel/qt_x11_p.h:71:23: X11/Xutil.h: No such file or directory
kernel/qt_x11_p.h:72:21: X11/Xos.h: No such file or directory
kernel/qt_x11_p.h:73:23: X11/Xatom.h: No such file or directory
make[2]: *** [.obj/release-shared-mt/qtaddons_x11.o] Error 1


Any ideas where I dropped the ball here?

Thanks
Jeff