gnu: Add S-Lang.

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

gnu-system.am

@@ -244,6 +244,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/serveez.scm			\
   gnu/packages/shishi.scm			\
   gnu/packages/skribilo.scm			\
+  gnu/packages/slang.scm			\
   gnu/packages/slim.scm				\
   gnu/packages/smalltalk.scm			\
   gnu/packages/socat.scm			\

gnu/packages/slang.scm

@@ -0,0 +1,70 @@
+;;; 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 slang)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages readline)
+  #:use-module (gnu packages ncurses)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages image)
+  #:use-module (gnu packages pcre))
+
+(define-public slang
+  (package
+    (name "slang")
+    (version "2.3.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://www.jedsoft.org/releases/slang/slang-"
+                    version
+                    ".tar.gz"))
+              (sha256
+               (base32
+                "0aqd2cjabj6nhd4r3dc4vhqif2bf3dmqnrn2gj0xm4gqyfd177jy"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  (substitute* "src/Makefile.in"
+                    (("/bin/ln") "ln"))
+                  (substitute* "configure"
+                    (("-ltermcap") ""))))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:parallel-tests? #f))
+    (inputs
+     `(("readline" ,readline)
+       ("zlib" ,zlib)
+       ("libpng" ,libpng)
+       ("pcre" ,pcre)
+       ("ncurses" ,ncurses)))
+    (home-page "http://www.jedsoft.org/slang/")
+    (synopsis "Library for interactive applications and extensibility")
+    (description
+     "S-Lang is a multi-platform programmer's library designed to allow a
+developer to create robust multi-platform software. It provides facilities
+required by interactive applications such as display/screen management,
+keyboard input, keymaps, and so on. The most exciting feature of the library
+is the slang interpreter that may be easily embedded into a program to make it
+extensible. While the emphasis has always been on the embedded nature of the
+interpreter, it may also be used in a stand-alone fashion through the use of
+slsh, which is part of the S-Lang distribution.")
+    (license license:gpl2+)))