gnu: Add mes.

* gnu/packages/mes.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/local.mk

@@ -256,6 +256,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/maths.scm			\
   %D%/packages/mc.scm				\
   %D%/packages/mcrypt.scm			\
+  %D%/packages/mes.scm				\
   %D%/packages/messaging.scm			\
   %D%/packages/mingw.scm			\
   %D%/packages/mg.scm				\

gnu/packages/mes.scm

@@ -0,0 +1,74 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Jan Nieuwenhuizen <janneke@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 mes)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages commencement)
+  #:use-module (gnu packages cross-base)
+  #:use-module (gnu packages gcc)
+  #:use-module (gnu packages guile)
+  #:use-module (gnu packages package-management)
+  #:use-module (gnu packages perl)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix git-download)
+  #:use-module (guix licenses)
+  #:use-module (guix packages))
+
+(define-public mes
+  (let ((commit   "a437c173b9da1949ad966fd50dd4f26e522a910a")
+        (revision "0")
+        (triplet  "i686-unknown-linux-gnu"))
+    (package
+      (name "mes")
+      (version (string-append "0.5-" revision "." (string-take commit 7)))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://gitlab.com/janneke/mes")
+                      (commit commit)))
+                (file-name (string-append name "-" version))
+                ;; TODO: Unbundle nyacc.
+                (sha256
+                 (base32 "1ynr0hc0k15307sgzv09k3y5rvy46h0wbh7zcblx1f9v7y8k90zv"))))
+      (build-system gnu-build-system)
+      (supported-systems '("x86_64-linux"))
+      (native-inputs
+       `(("guile" ,guile-2.2)
+         ;; Use cross-compiler rather than #:system "i686-linux" to get
+         ;; MesCC 64 bit .go files installed ready for use with Guile.
+         ("i686-linux-binutils" ,(cross-binutils triplet))
+         ("i686-linux-gcc" ,(let ((triplet triplet)) (cross-gcc triplet)))
+         ("perl" ,perl)))                       ;build-aux/gitlog-to-changelog
+      (arguments
+       `(#:phases
+         (modify-phases %standard-phases
+           (add-before 'install 'generate-changelog
+             (lambda _
+               (with-output-to-file "ChangeLog"
+                 (lambda ()
+                   (display "Please run
+    build-aux/gitlog-to-changelog --srcdir=<git-checkout> > ChangeLog\n")))
+               #t)))))
+      (synopsis "Maxwell Equations of Software")
+      (description
+       "Mes aims to create full source bootstrapping for GuixSD.  It
+consists of a mutual self-hosting [close to Guile-] Scheme interpreter
+prototype in C and a Nyacc-based C compiler in [Guile] Scheme.")
+      (home-page "https://gitlab.com/janneke/mes")
+      (license gpl3+))))