xserver-xorg-dev 2:1.2.0-3ubuntu3 (amd64 binary) in ubuntu feisty

 This package provides development files for the X.Org ('Xorg') X server.
 This is not quite the same as the DDK (Driver Development Kit) from the
 XFree86 4.x and X.Org 6.7, 6.8 and 6.9 series of servers; it provides
 headers and a pkg-config file for drivers using autotools to build
 against.
 .
 Unless you are developing or building a driver, you probably want
 xserver-xorg and/or xserver-xorg-core instead.
 .
 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 'xserver/xorg' at
 :pserver:anoncvs@cvs.freedesktop.org:/cvs/xorg