gnu: Add quassel.

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

gnu-system.am

@@ -166,6 +166,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/indent.scm			\
   gnu/packages/inklingreader.scm		\
   gnu/packages/inkscape.scm			\
+  gnu/packages/irc.scm  			\
   gnu/packages/irssi.scm			\
   gnu/packages/iso-codes.scm			\
   gnu/packages/java.scm				\

gnu/packages/irc.scm

@@ -0,0 +1,68 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
+;;;
+;;; 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 irc)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix download)
+  #:use-module (guix packages)
+  #:use-module (guix build-system cmake)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages kde)
+  #:use-module (gnu packages kde-frameworks)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages qt))
+
+(define-public quassel
+  (package
+    (name "quassel")
+    (version "0.12.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "http://quassel-irc.org/pub/quassel-"
+                            version ".tar.bz2"))
+        (sha256
+         (base32
+          "0d6lwf6qblj1ia5j9mjy112zrmpbbg9mmxgscbgxiqychldyjgjd"))))
+    (build-system cmake-build-system)
+    (arguments
+      ;; The three binaries are not mutually exlusive, and are all built
+      ;; by default.
+     `(#:configure-flags '(;;"-DWANT_QTCLIENT=OFF" ; 5.0 MiB
+                           ;;"-DWANT_CORE=OFF" ; 2.3 MiB
+                           ;;"-DWANT_MONO=OFF" ; 6.3 MiB
+                           "-DUSE_QT5=ON" ; default is qt4
+                           "-DWITH_KDE=OFF" ; no to integration
+                           "-DWITH_OXYGEN=ON" ; on=embed icons
+                           "-DWITH_WEBKIT=ON") ; wants qtwebkit, in qt5
+       #:tests? #f)) ; no test target
+    (native-inputs `(("pkg-config" ,pkg-config)))
+    (inputs
+     `(("extra-cmake-modules" ,extra-cmake-modules)
+       ("oxygen-icons" ,oxygen-icons)
+       ("qca" ,qca)
+       ("qt", qt)
+       ("snorenotify" ,snorenotify)
+       ("zlib" ,zlib)))
+    (home-page "http://quassel-irc.org/")
+    (synopsis "Distributed IRC client")
+    (description "Quassel is a distributed IRC client, meaning that one or more
+clients can attach to and detach from the central core.  It resembles the
+popular combination of screen and a text-based IRC client such as WeeChat or
+irssi, but graphical.")
+    (license (list license:gpl2 license:gpl3)))) ;; dual licensed