"John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx> writes: > CentOS is a derivative of Red Hat Enterprise Linux. I've heard it said > that RHEL is obsolete by design. You could upgrade to CentOS 6. That contains autoconf 2.63, but the color option was only introduced in 2.65 AFAIK. So there's not that much of an incentive in upgrading. I'm using Ubuntu LTS which comes with autoconf 2.68 and is supported for (almost, if not just) as long as RHEL. Thanks Christian -- Christian Egli Swiss Library for the Blind, Visually Impaired and Print Disabled Grubenstrasse 12, CH-8045 Zürich, Switzerland For a description of the software, to download it and links to project pages go to http://www.abilitiessoft.com