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/cc.sh

@@ -0,0 +1,56 @@
+# GNU Mes --- Maxwell Equations of Software
+# Copyright © 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/>.
+
+objects=
+compile () {
+    c=${srcdest}$1
+    b=$(basename $c .c)
+    o=$b.o
+    objects="$objects $o"
+    if test ! -e $o -o $c -nt $o; then
+        trace "CC         $c" $CC -c $AM_CPPFLAGS $CPPFLAGS $AM_CFLAGS $CFLAGS -o $o $c
+        $CC -c $AM_CPPFLAGS $CPPFLAGS $AM_CFLAGS $CFLAGS -o $o $c
+    fi
+}
+
+archive () {
+    archive=$1
+    shift
+    sources="$@"
+    objects=
+    for c in $sources; do
+        b=$(basename $c .c)
+        o=$b.o
+        compile $c
+    done
+    trace "AR         $archive" $AR crD $archive $objects
+    objects=
+}
+
+link () {
+    out=$1
+    d=$(dirname $out)
+    mkdir -p $d
+    if test $mes_libc = system; then
+        crt1=
+    else
+        crt1=crt1.o
+    fi
+    trace "CCLD       $out" $CC $AM_CFLAGS $CFLAGS $AM_LDFLAGS $LDFLAGS -o $out $crt1 $objects $LIBS
+    objects=
+}