Imake

imake is a build automation system written for the X Window System. It was used by X from X11R1 to X11R6.9, and continued to be used in XFree86. It is implemented on top of the C preprocessor and make. The first version was written by Todd Brunhoff at Tektronix.
imake generates makefiles from a template, a set of C preprocessor macro functions, and a per-directory input file called an Imakefile. This allows machine dependencies to be kept separate from the descriptions of the various items to be built.
imake was heavily used for X and X-related software through the 1990s, and for unrelated software such as ChorusOS. It was also used for configuration management.
With the release of X.[Org Server|X.org X11R7.0], it was replaced by GNU Autotools.. X.Org plans to use Meson in the future instead of Autotools.