gnu: Add bullet.

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

gnu-system.am

@@ -96,6 +96,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/freeipmi.scm			\
   gnu/packages/ftp.scm				\
   gnu/packages/fribidi.scm			\
+  gnu/packages/game-development.scm		\
   gnu/packages/games.scm			\
   gnu/packages/gawk.scm				\
   gnu/packages/gcal.scm				\

gnu/packages/game-development.scm

@@ -0,0 +1,48 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Tomáš Čech <sleep_walker@suse.cz>
+;;;
+;;; 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 game-development)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system cmake)
+  #:use-module (gnu packages))
+
+(define-public bullet
+  (package
+    (name "bullet")
+    (version "2.82-r2704")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://bullet.googlecode.com/files/bullet-"
+                                  version ".tgz"))
+              (sha256
+               (base32
+                "1lnfksxa9b1slyfcxys313ymsllvbsnxh9np06azkbgpfvmwkr37"))))
+    (build-system cmake-build-system)
+    (arguments '(#:tests? #f ; no 'test' target
+                 #:configure-flags (list
+                                    (string-append
+                                     "-DCMAKE_CXX_FLAGS=-fPIC "
+                                     (or (getenv "CXXFLAGS") "")))))
+    (home-page "http://bulletphysics.org/")
+    (synopsis "3D physics engine library")
+    (description
+     "Bullet is a physics engine library usable for collision detection.  It
+is used in some video games and movies.")
+    (license zlib)))