Add mes and mescc-tools-extra

mescc-tools-extra contains two important tools:
- cp
- chmod

mes first builds itself from a mes 0.21 seed as used by guix, and then
builds a mes 0.22 and then mes 0.22 using that created mes 0.22.

It does /not/ use bootstrap.sh as we don't have a proper shell at this
point, it has been manually adapted for kaem.

sysa/mes-0.22/tests/syntax.test

@@ -0,0 +1,87 @@
+#! /bin/sh
+# -*-scheme-*-
+exec ${MES-bin/mes} --no-auto-compile -L ${0%/*} -L module -C module -e '(tests syntax)' -s "$0" "$@"
+!#
+
+;;; -*-scheme-*-
+
+;;; GNU Mes --- Maxwell Equations of Software
+;;; Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of GNU Mes.
+;;;
+;;; GNU Mes 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 Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (tests syntax)
+  #:use-module (mes mes-0)
+  #:use-module (mes test))
+
+(mes-use-module (mes test))
+(mes-use-module (mes syntax))
+
+(pass-if "first dummy" #t)
+(pass-if-not "second dummy" #f)
+
+(define-syntax sr:when
+  (syntax-rules ()
+    ((sr:when condition exp ...)
+     (if condition
+         (begin exp ...)))))
+
+(sr:when #t
+         (display "hallo\n")
+         (display "daar\n"))
+
+
+;; FIXME: macro inside let
+(define-syntax sr:when
+  (syntax-rules ()
+    ((sc:when condition exp ...)
+     (if condition
+         (begin exp ...)))))
+
+(pass-if "define-syntax when"
+  (sequal?
+   (let ()
+     (define-syntax sr:when
+       (syntax-rules ()
+         ((sc:when condition exp ...)
+          (if condition
+              (begin exp ...)))))
+     (let ()
+       (sr:when #t "if not now, then?")))
+   "if not now, then?"))
+
+;; FIXME: macro inside let
+(define-syntax-rule (sre:when c e ...)
+  (if c (begin e ...)))
+
+(pass-if "define-syntax-rule"
+  (sequal?
+   (let ()
+     (define-syntax-rule (sre:when c e ...)
+       (if c (begin e ...)))
+     (let ()
+       (sre:when #t "if not now, then?")))
+   "if not now, then?"))
+
+(pass-if-equal "syntax-rules plus"
+    (+ 1 2 3)
+  (let ()
+    (define-syntax plus
+      (syntax-rules ()
+        ((plus x ...) (+ x ...))))
+    (plus 1 2 3)))
+
+(result 'report)