gnu: Add giflib.

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

gnu-system.am

@@ -81,6 +81,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/geeqie.scm			\
   gnu/packages/gettext.scm			\
   gnu/packages/ghostscript.scm			\
+  gnu/packages/giflib.scm			\
   gnu/packages/gkrellm.scm			\
   gnu/packages/gl.scm				\
   gnu/packages/glib.scm				\

gnu/packages/giflib.scm

@@ -0,0 +1,76 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Mark H Weaver <mhw@netris.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 giflib)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (srfi srfi-1)
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu packages perl))
+
+(define-public giflib
+  (package
+    (name "giflib")
+    (version "4.2.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://sourceforge/giflib/giflib-"
+                                  (first (string-split version #\.))
+                                  ".x/giflib-" version ".tar.bz2"))
+              (sha256
+               (base32 "0rmp7ipzk42r841bggd7bfqk4p8qsssbp4wcck4qnz7p4rkxbj0a"))))
+    (build-system gnu-build-system)
+    (outputs '("bin"                    ; utility programs
+               "out"))                  ; library
+    (inputs `(("libx11" ,libx11)
+              ("libice" ,libice)
+              ("libsm" ,libsm)
+              ("perl" ,perl)))
+    (arguments
+     `(#:phases (alist-cons-after
+                 'unpack 'disable-html-doc-gen
+                 (lambda _
+                   (substitute* "doc/Makefile.in"
+                     (("^all: allhtml manpages") "")))
+                 (alist-cons-after
+                  'install 'install-manpages
+                  (lambda* (#:key outputs #:allow-other-keys)
+                    (let* ((bin (assoc-ref outputs "bin"))
+                           (man1dir (string-append bin "/share/man/man1")))
+                      (mkdir-p man1dir)
+                      (for-each (lambda (file)
+                                  (let ((base (basename file)))
+                                    (format #t "installing `~a' to `~a'~%"
+                                            base man1dir)
+                                    (copy-file file
+                                               (string-append
+                                                man1dir "/" base))))
+                                (find-files "doc" "\\.1"))))
+                  %standard-phases))))
+    (synopsis "Tools and library for working with GIF images")
+    (description
+     "giflib is a library for reading and writing GIF images.  It is API and
+ABI compatible with libungif which was in wide use while the LZW compression
+algorithm was patented.  Tools are also included to convert, manipulate,
+compose, and analyze GIF images.")
+    (home-page "http://giflib.sourceforge.net/")
+    (license x11)))
+
+;;; giflib.scm ends here