libx11-dev 2:1.0.0-0ubuntu3 (hppa binary) in ubuntu dapper

X11 client-side library (development headers)
 This package provides the main client interface to the X Window System, and is
 otherwise known as 'Xlib'. It provides a complete API for the basic functions
 of the window system.
 .
 This package contains the development headers for the library found in libx11-6.
 Non-developers likely have little use for this package.
 .
 More information about X.Org can be found at:
 <URL:http://xorg.freedesktop.org>
 <URL:http://lists.freedesktop.org/mailman/listinfo/xorg>
 .
 This module can be found as the module 'lib/X11' at
 :pserver:anoncvs@cvs.freedesktop.org:/cvs/xorg