Check whether the GNU ADNS library available from http://www.chiark.greenend.org.uk/~ian/adns/ is installed on this system. The test is known to work with version 1.4 (or later). If the library is found, the flags necessary to link it are added to $LIBS.
Download the latest version of ax_have_adns.m4 or browse the macro’s revision history.
Copyright © 2008 Peter Simons email@example.com
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without any warranty.