"imake" is a utility that works with "imake" to enable code to be compiled and installed on different UNIX machines. "imake" makes possible the wide portability of the X Window System code and is widely considered an X tool, but it's also useful for any software project that needs to be ported to many UNIX systems. "imake" also runs under Windows NT. This handbook is ideal for X and UNIX programmers who want their software to be portable. The book is divided into two sections. The first section is a general explanation of "imake," X configuration files, and how to write and debug an "Imakefile," The second section describes how to write configuration files and presents a configuration file architecture that allows development of coexisting sets of configuration files. Several sample sets of configuration files are described and are available free over the Net. New in the second edition: Updated to cover the version X11R6.1 of the X Window System Discusses using "imake" for non-UNIX systems such as Windows NT Covers some of the quirks about using "imake" under OpenWindows/Solaris