build: Resurrect guile-2.0. Thanks rain1!

* module/mes/guile.scm: New file.
* module/mes/elf.scm: Include it.
* module/mes/bytevectors.scm: : Include it.
* module/mes/as.scm: Include it.
* module/mes/as-i386.scm: Include it.
* module/mes/M1.scm: Include it.
* module/language/c99/compiler.scm: Include it.
* make.scm: Update.

make.scm

@@ -1,7 +1,6 @@
 #! /bin/sh
 # -*- scheme -*-
-#exec ${GUILE-guile} --no-auto-compile -L . -L guile -C . -C guile -s "$0" ${1+"$@"}
-exec ${GUILE-guile} -L . -L guile -C . -C guile -s "$0" ${1+"$@"}
+exec ${GUILE-guile} --no-auto-compile -L . -L guile -C . -C guile -s "$0" ${1+"$@"}
 !#
 
 (use-modules (srfi srfi-26))
@@ -23,8 +22,8 @@ exec ${GUILE-guile} -L . -L guile -C . -C guile -s "$0" ${1+"$@"}
   (setenv "host" %host-type)
   (apply system* `("guile"
                    "--no-auto-compile"
-                   "-L" "." "-L" "guile"
-                   "-C" "." "-C" "guile"
+                   "-L" "."
+                   "-C" "."
                    "-s"
                    "build-aux/compile-all.scm"
                    ,@scm-files)))

module/language/c99/compiler.scm

@@ -28,12 +28,13 @@
   #:use-module (system base pmatch)
   #:use-module (ice-9 optargs)
   #:use-module (ice-9 pretty-print)
+  #:use-module (nyacc lang c99 parser)
+  #:use-module (nyacc lang c99 pprint)
+  #:use-module (mes guile)
   #:use-module (mes as)
   #:use-module (mes as-i386)
   #:use-module (mes elf)
   #:use-module (mes M1)
-  #:use-module (nyacc lang c99 parser)
-  #:use-module (nyacc lang c99 pprint)
   #:export (c99-ast->info
             c99-input->ast
             c99-input->elf

module/mes/M1.scm

@@ -26,6 +26,7 @@
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-26)
   #:use-module (system base pmatch)
+  #:use-module (mes guile)
   #:use-module (mes as)
   #:use-module (mes elf)
   #:export (object->M1

module/mes/as-i386.scm

@@ -25,6 +25,7 @@
 ;;; Code:
 
 (define-module (mes as-i386)
+  #:use-module (mes guile)
   #:use-module (mes as)
   #:export (
             i386:accu-not

module/mes/as.scm

@@ -24,6 +24,7 @@
 
 (define-module (mes as)
   #:use-module (srfi srfi-1)
+  #:use-module (mes guile)
   #:use-module (mes bytevectors)
   #:export (dec->hex
             int->bv16

module/mes/bytevectors.scm

@@ -23,6 +23,7 @@
 ;;; Code:
 
 (define-module (mes bytevectors)
+  #:use-module (mes guile)
   #:export (bytevector-u32-native-set!
             bytevector-u16-native-set!
             make-bytevector))

module/mes/elf.scm

@@ -23,6 +23,7 @@
 ;;; Code:
 
 (define-module (mes elf)
+  #:use-module (mes guile)
   #:export (M1->elf))
 
 (cond-expand

module/mes/guile.scm

@@ -0,0 +1,47 @@
+;;; -*-scheme-*-
+
+;;; Mes --- Maxwell Equations of Software
+;;; Copyright © 2017 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of Mes.
+;;;
+;;; 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.
+;;;
+;;; 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(define-module (mes guile))
+
+(cond-expand
+ (guile-2.2)
+ (guile-2
+  (eval-when (compile load eval)
+    (define-syntax include-from-path
+      (lambda (x)
+        (syntax-case x ()
+          ((k filename)
+           (let ((fn (syntax->datum #'filename)))
+             (with-syntax ((fn (datum->syntax
+                                #'filename
+                                (canonicalize-path
+                                 (or (%search-load-path fn)
+                                     (syntax-violation 'include-from-path
+                                                       "file not found in path"
+                                                       x #'filename))))))
+               #'(include fn))))))))
+  (export include-from-path))
+ (guile
+  (use-modules (ice-9 syncase)))
+ (mes))