gnu: Add gtk-xfce-engine.

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

gnu-system.am

@@ -279,6 +279,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/xnee.scm				\
   gnu/packages/xdisorg.scm			\
   gnu/packages/xorg.scm				\
+  gnu/packages/xfce.scm				\
   gnu/packages/yasm.scm				\
   gnu/packages/yubico.scm			\
   gnu/packages/zile.scm				\

gnu/packages/xfce.scm

@@ -0,0 +1,48 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Sou Bunnbu <iyzsong@gmail.com>
+;;;
+;;; 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 xfce)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages glib)
+  #:use-module (gnu packages gtk))
+
+(define-public gtk-xfce-engine
+  (package
+    (name "gtk-xfce-engine")
+    (version "3.0.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "http://archive.xfce.org/xfce/4.10/src/"
+                                  name "-" version ".tar.bz2"))
+              (sha256
+               (base32
+                "13c3ajfqkdr6jlqjyhcp4nls0ddanypr83q9qib2ciffik78zq4h"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("intltool" ,intltool)))
+    (inputs `(("gtk+" ,gtk+-2)))
+    (home-page "http://www.xfce.org/")
+    (synopsis "GTK+ theme engine for Xfce")
+    (description
+     "Default GTK+ engine and themes for Xfce Desktop Environment.")
+    (license gpl2+)))