gnu: Add yasm.

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

gnu-system.am

@@ -176,6 +176,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/xml.scm				\
   gnu/packages/xnee.scm				\
   gnu/packages/xorg.scm				\
+  gnu/packages/yasm.scm				\
   gnu/packages/zile.scm				\
   gnu/packages/zip.scm				\
   gnu/system/vm.scm

gnu/packages/yasm.scm

@@ -0,0 +1,55 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 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 yasm)
+  #:use-module (gnu packages)
+  #:use-module ((guix licenses)
+                #:renamer (symbol-prefix-proc 'license:))
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages python)
+  #:use-module (gnu packages xml))
+
+(define-public yasm
+  (package
+    (name "yasm")
+    (version "1.2.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "http://www.tortall.net/projects/yasm/releases/yasm-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "0cfg7ji3ia2in628w42wrfvw2ixmmm4rghwmv2k202mraysgm3vn"))))
+    (build-system gnu-build-system)
+    (inputs
+     `(("python" ,python)
+       ("xmlto" ,xmlto)))
+    (home-page "http://yasm.tortall.net/")
+    (synopsis "Rewrite of the NASM assembler")
+    (description
+     "Yasm is a complete rewrite of the NASM assembler.
+
+Yasm currently supports the x86 and AMD64 instruction sets, accepts NASM
+and GAS assembler syntaxes, outputs binary, ELF32, ELF64, 32 and 64-bit
+Mach-O, RDOFF2, COFF, Win32, and Win64 object formats, and generates source
+debugging information in STABS, DWARF 2, and CodeView 8 formats.")
+    (license (license:bsd-style "file://COPYING"
+                                "See COPYING in the distribution."))))