gnu: Add CGAL.

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

gnu-system.am

@@ -122,6 +122,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/gperf.scm			\
   gnu/packages/gprolog.scm			\
   gnu/packages/gps.scm				\
+  gnu/packages/graphics.scm			\
   gnu/packages/graphviz.scm			\
   gnu/packages/groff.scm			\
   gnu/packages/grub.scm				\

gnu/packages/graphics.scm

@@ -0,0 +1,65 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 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 graphics)
+  #:use-module (guix download)
+  #:use-module (guix packages)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system cmake)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages multiprecision)
+  #:use-module (gnu packages boost))
+
+(define-public cgal
+  (package
+    (name "cgal")
+    (version "4.5.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://gforge.inria.fr/frs/download.php/file/34402/CGAL-"
+                    version ".tar.xz"))
+              (sha256
+               (base32
+                "1565ycbds92bxmhi09avc1jl6ks141ig00j110l49gqxp9swy6zv"))))
+    (build-system cmake-build-system)
+    (arguments
+     '(;; "RelWithDebInfo" is not supported.
+       #:build-type "Release"
+
+       ;; No 'test' target.
+       #:tests? #f))
+    (inputs
+     `(("mpfr" ,mpfr)
+       ("gmp" ,gmp)
+       ("boost" ,boost)))
+    (home-page "http://cgal.org/")
+    (synopsis "Computational geometry algorithms library")
+    (description
+     "CGAL provides easy access to efficient and reliable geometric algorithms
+in the form of a C++ library.  CGAL is used in various areas needing geometric
+computation, such as: computer graphics, scientific visualization, computer
+aided design and modeling, geographic information systems, molecular biology,
+medical imaging, robotics and motion planning, mesh generation, numerical
+methods, etc.  It provides data structures and algorithms such as
+triangulations, Voronoi diagrams, polygons, polyhedra, mesh generation, and
+many more.")
+
+    ;; The 'LICENSE' file explains that a subset is available under more
+    ;; permissive licenses.
+    (license license:gpl3+)))