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/build-aux/build-scaffold.sh

@@ -0,0 +1,149 @@
+#! /bin/sh
+
+# GNU Mes --- Maxwell Equations of Software
+# Copyright © 2017,2018,2019 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/>.
+
+set -e
+set -u
+
+V=${V-1}
+
+if [ "$V" = 2 ]; then
+    set -x
+fi
+
+. ./config.sh
+. ${srcdest}build-aux/trace.sh
+
+if $courageous; then
+    set +e
+    set_min_e () {
+        echo "Applying courage"
+    }
+    set_min_e
+else
+    set_min_e () {
+        set -e
+    }
+fi
+
+case "$mes_cpu" in
+    arm)
+        stage0_arch=40
+        stage0_cpu=armv7l
+        ;;
+    x86_64)
+        stage0_arch=2
+        stage0_cpu=amd64
+        ;;
+    x86)
+        stage0_arch=1
+        stage0_cpu=x86
+        ;;
+    *)
+        stage0_arch=1
+        stage0_cpu=$mes_cpu
+        ;;
+esac
+
+trace "CCLD       ${srcdest}lib/$mes_kernel/$mes_cpu-mes-$compiler/exit-42.S" $CC\
+      -nostdlib\
+      -g\
+      ${srcdest}lib/$mes_kernel/$mes_cpu-mes-$compiler/exit-42.S\
+      -o exit-42
+
+trace "TEST       exit-42"
+{ set +e; ./exit-42; r=$?; set_min_e; }
+[ $r != 42 ] && echo "  => $r"
+[ $r = 42 ]
+
+if $numbered_arch; then
+    stage0_cpu_flag="--Architecture $stage0_arch";
+else
+    stage0_cpu_flag="--architecture $stage0_cpu";
+fi
+
+trace "HEX2       ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0exit-42.hex2" $HEX2\
+      --LittleEndian\
+      $stage0_cpu_flag\
+      --BaseAddress 0x1000000\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0header.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0exit-42.hex2\
+      --exec_enable\
+      -o 0exit-42
+
+trace "TEST       0exit-42"
+{ set +e; ./0exit-42; r=$?; set_min_e; }
+[ $r != 42 ] && echo "  => $r"
+[ $r = 42 ]
+
+trace "HEX2       ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-body-exit-42.hex2" $HEX2\
+      --LittleEndian\
+      $stage0_cpu_flag\
+      --BaseAddress 0x1000000\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-header.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-body-exit-42.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-footer-single-main.hex2\
+      --exec_enable\
+      -o body-exit-42
+
+trace "TEST       body-exit-42"
+{ set +e; ./body-exit-42; r=$?; set_min_e; }
+[ $r != 42 ] && echo "  => $r"
+[ $r = 42 ]
+
+### FIXME: c&p from exit-42
+trace "CCLD       ${srcdest}lib/$mes_kernel/$mes_cpu-mes-$compiler/hello-mes.S" $CC\
+      -nostdlib\
+      -g\
+      ${srcdest}lib/$mes_kernel/$mes_cpu-mes-$compiler/hello-mes.S\
+      -o hello-mes
+
+trace "TEST       hello-mes"
+{ set +e; ./hello-mes; r=$?; set_min_e; }
+[ $r != 0 ] && echo "  => $r"
+[ $r = 0 ]
+
+trace "HEX2       ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0hello-mes.hex2" $HEX2\
+      --LittleEndian\
+      $stage0_cpu_flag\
+      --BaseAddress 0x1000000\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0header.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-0hello-mes.hex2\
+      --exec_enable\
+      -o 0hello-mes
+
+trace "TEST       0hello-mes"
+{ set +e; ./0hello-mes; r=$?; set_min_e; }
+[ $r != 0 ] && echo "  => $r"
+[ $r = 0 ]
+
+trace "HEX2       ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-body-hello-mes.hex2" $HEX2\
+      --LittleEndian\
+      $stage0_cpu_flag\
+      --BaseAddress 0x1000000\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-header.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-body-hello-mes.hex2\
+      -f ${srcdest}lib/$mes_kernel/$mes_cpu-mes/elf$mes_bits-footer-single-main.hex2\
+      --exec_enable\
+      -o body-hello-mes
+
+trace "TEST       body-hello-mes"
+{ set +e; ./body-hello-mes; r=$?; set_min_e; }
+[ $r != 0 ] && echo "  => $r"
+[ $r = 0 ]