The following macros manage version numbers for configure scripts. Using them is optional.
The copyright-notice shows up in both the head of configure and in ‘configure --version’.
Copy revision stamp revision-info into the configure script, with any dollar signs or double-quotes removed. This macro lets you put a revision stamp from configure.ac into configure without RCS or CVS changing it when you check in configure. That way, you can determine easily which revision of configure.ac a particular configure corresponds to.
For example, this line in configure.ac:AC_REVISION([$Revision: 1.30 $])
produces this in configure:#!/bin/sh # From configure.ac Revision: 1.30