xorg-dev 7.0.0-0ubuntu43 (i386 binary) in ubuntu dapper

 This metapackage provides the development libraries for the X.Org X Window
 System.
 .
 X Window System design documentation, manual pages, library reference
 works, unstripped and static versions of the shared libraries, C header
 files, and special versions of libraries available only in static form
 (with and without PIC symbols included) are supplied by the packages
 depended on by this metapackage.
 .
 Note that this is a convinience package for users and is not a package for
 Debian developers to have their package depend on.