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
Producing configuration scripts using Autoconf requires GNU M4 and
Perl. You should install GNU M4 (version 1.4.6 or later is required;
1.4.14 or later is recommended) and Perl (5.006 or later) before
configuring Autoconf, so that Autoconf's configure script can find
them. The configuration scripts produced by Autoconf are
self-contained, so their users do not need to have Autoconf (or GNU
M4, Perl, etc.).
You can get GNU M4 here:
1a967b869fff182b4b619ace5084a16a, 9625600 , 2013-06-21