gnu: Add GNU adns.

* gnu/packages/adns.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu-system.am

@@ -28,6 +28,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/acct.scm				\
   gnu/packages/acl.scm				\
   gnu/packages/admin.scm			\
+  gnu/packages/adns.scm				\
   gnu/packages/algebra.scm			\
   gnu/packages/aidc.scm				\
   gnu/packages/apl.scm				\

gnu/packages/adns.scm

@@ -0,0 +1,55 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages adns)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu))
+
+(define-public adns
+  (package
+    (name "adns")
+    (version "1.5.0")
+    (source (origin
+              (method url-fetch)
+              (uri (list (string-append "mirror://gnu/adns/adns-"
+                                        version ".tar.gz")
+                         (string-append
+                          "http://www.chiark.greenend.org.uk/~ian/adns/ftp/adns-"
+                          version ".tar.gz")))
+              (sha256
+               (base32
+                "0hg89b5n84zjhzvbzrpvhl0hbm4s6d1z2pzllfis64ai656ypibz"))))
+    (build-system gnu-build-system)
+    (arguments
+     ;; Make sure the programs under bin/ fine libadns.so.
+     '(#:configure-flags (list (string-append "LDFLAGS=-Wl,-rpath -Wl,"
+                                              (assoc-ref %outputs "out")
+                                              "/lib"))
+
+       ;; XXX: Tests expect real name resolution to work.
+       #:tests? #f))
+    (home-page "http://www.gnu.org/software/adns/")
+    (synopsis "Asynchronous DNS client library and utilities")
+    (description
+     "GNU adns is a C library that provides easy-to-use DNS resolution
+functionality.  The library is asynchronous, allowing several concurrent
+calls.  The package also includes several command-line utilities for use in
+scripts.")
+    (license gpl3+)))