Remove the notion of "sys*"

- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.

steps/guile-3.0.9/pass1.sh

@@ -0,0 +1,90 @@
+# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2021 Michael Schierl <schierlm@gmx.de>
+# SPDX-FileCopyrightText: 2022 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# guile-psyntax-bootstrapping only supports Guile 3.0.7
+# We need Guile 3.0.8 or later in order to have reproducible builds when
+# parallelism (-jX) is enabled.
+#
+# To work around this issue, we;
+# 1. run guile-psyntax-bootstrapping on Guile 3.0.7
+# 2. take psyntax-pp.scm from Guile 3.0.7 and transplant into 3.0.9
+# 3. compile guile 3.0.9
+
+common_prepare() {
+    find . -name '*.info*' -delete
+    rm -r prebuilt/*/ice-9
+
+    # Remove buildstamp
+    sed -i "s/\`date -u +'%Y-%m-%d %T'.*\`/1970-01-01 00:00:00/" libguile/Makefile.am
+
+    autoreconf-2.71 -fi
+}
+
+src_prepare() {
+    # First, prepare Guile 3.0.7
+    cd ../guile-3.0.7
+    ../../import-gnulib-3.0.7.sh
+    common_prepare
+
+    # pp-syntax bootstrap: remove pre-gen file
+    sha256sum module/ice-9/psyntax-pp.scm | tee psyntax-pp.sha256
+    rm module/ice-9/psyntax-pp.scm
+
+    ## now let us prepare to rebuild it
+    echo '(primitive-load-path "psyntax-bootstrap/allsteps")' > module/ice-9/psyntax-pp.scm
+    mkdir -p module/psyntax-bootstrap
+    cp ../guile-psyntax-bootstrapping-guile-3.0.7/psyntax-bootstrap/*.scm module/psyntax-bootstrap
+    cd module/ice-9
+    cp psyntax.scm psyntax-patched.scm
+    patch <../../../guile-psyntax-bootstrapping-guile-3.0.7/stage2.patch
+    cd ../..
+
+    # Now, Guile 3.0.9
+    cd ../guile-3.0.9
+    default
+    ../../import-gnulib.sh
+    common_prepare
+}
+
+src_configure() {
+    for d in . ../guile-3.0.7; do
+        pushd "${d}"
+        PKG_CONFIG_PATH="${LIBDIR}/pkgconfig" ./configure \
+            --prefix="${PREFIX}" \
+            --libdir="${LIBDIR}" \
+            --build=i386-unknown-linux-musl \
+            --disable-shared \
+            --disable-jit
+        popd
+    done
+}
+
+src_compile() {
+    # pp-syntax: rebuild
+    pushd ../guile-3.0.7
+    make config.h
+    make libguile/scmconfig.h
+    make .version
+    cd lib
+    make all
+    cd ../meta
+    make all
+    cd ../libguile
+    make all
+    cd ../module
+    make ice-9/psyntax-pp.scm.gen
+    cd ..
+
+    # Note that on 32-bit systems psyntax-pp is not identical to the original
+    # and some identifier names are different.
+    popd
+
+    # Transplant psyntax-pp.scm
+    cp -f ../guile-3.0.7/module/ice-9/psyntax-pp.scm module/ice-9/
+
+    # Now proceed with the build
+    default
+}