I am trying install Qt Opensource 4.2.2 in my Red Hat Enterprise edition 9.
After ./configure, i tried running make which resulted in error.

It is telling some files included in qt_x11_p.h, namely <X11/Xatom.h>, <X11/Xlib.h>, <X11/Xutil.h>, <X11/Xos.h>, etc are missing.

What can be the problem? Somebody please help....