Imake is a utility that works with make 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.This Nutshell Handbook®--the only book available on imake--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.