Autoconf is an extensible package of M4 macros that produce shell
scripts to automatically configure software source code packages.
These scripts can adapt the packages to many kinds of UNIX-like
systems without manual user intervention. Autoconf creates a
configuration script for a package from a template file that lists the
operating system features that the package can use, in the form of M4
macro calls.
===> The following configuration options are available for autoconf-2.73:
INFO=on: Build and/or install GNU info pages
===> Use 'make config' to modify these settings