normally present in the distribution tarballs.
Therefore, if you're building from the sources obtained via
-Subversion, you'll need to have at least GNU Autoconf (2.57 or newer)
+Subversion, you'll need to have at least GNU Autoconf (2.59 or newer)
installed on your system. To generate the Info documentation, you
will need the GNU Texinfo package. Finally, if your system does not
have gettext and you want the support for internationalized messages,