distro: Add GNU Libidn.

* distro/packages/libidn.scm: New file.
* Makefile.am (MODULES): Add it.

Makefile.am

@@ -70,6 +70,7 @@ MODULES =					\
   distro/packages/ld-wrapper.scm		\
   distro/packages/less.scm			\
   distro/packages/libffi.scm			\
+  distro/packages/libidn.scm			\
   distro/packages/libsigsegv.scm		\
   distro/packages/libunistring.scm		\
   distro/packages/libusb.scm			\

distro/packages/libidn.scm

@@ -0,0 +1,51 @@
+;;; Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+;;; Copyright (C) 2012 Andreas Enge <andreas@enge.fr>
+;;;
+;;; This file is part of Guix.
+;;;
+;;; 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.
+;;;
+;;; 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 Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (distro packages libidn)
+  #:use-module (distro)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu))
+
+(define-public libidn
+  (package
+   (name "libidn")
+   (version "1.26")
+   (source (origin
+            (method url-fetch)
+            (uri (string-append "mirror://gnu/libidn/libidn-" version
+                                ".tar.gz"))
+            (sha256 (base32
+                     "0g657kv60rh486m7bwyp5k24ljmym4wnb8nmk6d3i3qgr1qlqbqa"))))
+   (build-system gnu-build-system)
+;; FIXME: No Java and C# libraries are currently built.
+   (synopsis "GNU Libidn, a library to encode and decode internationalised domain names")
+   (description
+    "GNU Libidn is a fully documented implementation of the Stringprep,
+Punycode and IDNA specifications. Libidn's purpose is to encode and decode
+internationalised domain names.
+
+The library contains a generic Stringprep implementation. Profiles for
+Nameprep, iSCSI, SASL, XMPP and Kerberos V5 are included. Punycode and
+ASCII Compatible Encoding (ACE) via IDNA are supported. A mechanism to
+define Top-Level Domain (TLD) specific validation tables, and to compare
+strings against those tables, is included.
+Default tables for some TLDs are also included.")
+   (license lgpl2.1+)
+   (home-page "http://www.gnu.org/software/libidn/")))