gnu: Add GNU complexity.

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

gnu-system.am

@@ -42,6 +42,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/check.scm			\
   gnu/packages/cmake.scm			\
   gnu/packages/compression.scm			\
+  gnu/packages/complexity.scm			\
   gnu/packages/cpio.scm				\
   gnu/packages/cppi.scm				\
   gnu/packages/cross-base.scm			\

gnu/packages/complexity.scm

@@ -0,0 +1,49 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 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 complexity)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix licenses)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages texinfo)
+  #:use-module (gnu packages autogen))
+
+(define-public complexity
+  (package
+    (name "complexity")
+    (version "1.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnu/complexity/complexity-"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "1aad7n35ymxbj5dlpvm64dcd71b6i7hbmps0g7nkf47vj53l6y2j"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("texinfo" ,texinfo)
+       ("autogen" ,autogen)))
+    (home-page "http://www.gnu.org/software/complexity/")
+    (synopsis "Analyze complexity of C functions")
+    (description
+     "GNU complexity provides tools for finding procedures that are
+convoluted, overly long or otherwise difficult to understand.  This
+may help in learning or reviewing unfamiliar code or perhaps
+highlighting your own code that seemed comprehensible when you wrote it.")
+    (license gpl3+)))