gnu: Add ETL.

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

gnu-system.am

@@ -33,6 +33,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/adns.scm				\
   gnu/packages/algebra.scm			\
   gnu/packages/aidc.scm				\
+  gnu/packages/animation.scm			\
   gnu/packages/apl.scm				\
   gnu/packages/apr.scm				\
   gnu/packages/aria2.scm			\

gnu/packages/animation.scm

@@ -0,0 +1,47 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
+;;;
+;;; 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 animation)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages))
+
+(define-public etl
+  (package
+    (name "etl")
+    (version "0.04.19")
+    (source (origin
+              (method url-fetch)
+              ;; Keep this synchronized with the synfig release version.
+              (uri (string-append "mirror://sourceforge/synfig/releases/"
+                                  "1.0.2/source/ETL-" version ".tar.gz"))
+              (sha256
+               (base32
+                "070c70slizrklq1gbgja8m49xfmq65wlcd6hz6418cpx0wd4r55s"))))
+    (build-system gnu-build-system)
+    (home-page "http://www.synfig.org")
+    (synopsis "Extended C++ template library")
+    (description
+     "ETL is a class and template library designed to add new datatypes and
+functions which combine well with the existing types and functions from the
+C++ @dfn{Standard Template Library} (STL).")
+    (license license:gpl3+)))
+