gnu: Add chmlib.

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

gnu-system.am

@@ -83,6 +83,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/docbook.scm			\
   gnu/packages/doxygen.scm			\
   gnu/packages/dwm.scm				\
+  gnu/packages/ebook.scm			\
   gnu/packages/ed.scm				\
   gnu/packages/elf.scm				\
   gnu/packages/emacs.scm			\

gnu/packages/ebook.scm

@@ -0,0 +1,40 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
+;;;
+;;; 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 ebook)
+  #:use-module ((guix licenses) #:select (gpl3))
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu))
+
+(define-public chmlib
+  (package
+    (name "chmlib")
+    (version "0.40")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "http://www.jedrea.com/chmlib/chmlib-"
+                                 version ".tar.bz2"))
+             (sha256
+               (base32
+                "18zzb4x3z0d7fjh1x5439bs62dmgsi4c1pg3qyr7h5gp1i5xcj9l"))))
+    (build-system gnu-build-system)
+    (home-page "http://www.jedrea.com/chmlib/")
+    (synopsis "Library for CHM files")
+    (description "CHMLIB is a library for dealing with ITSS/CHM format files.")
+    (license gpl3))) ; some files are under various other licenses, see COPYRIGHT