Add sysb and sysc scaffolding.

Now that we have the Linux Kernel built, we move to a full-disk (rather
than initramfs) setup in sysc. However, we cannot assume the seed kernel
has support for mounting hard drives. So, first we need to kexec into
sysb, which is used as a jumping off point to create the hard drive for
sysc.

Additionally, since 2.6.16 does not have support for on-demand initramfs
(initramfs must be built into kernel), we will have to rebuild the linux
kernel within sysb without the initramfs.

All of this process is not performed for chroot mode. Instead, we skip
sysb and jump straight to sysc, copying over appropriate data.

The python scripts have been changed slightly. Each sys* inherits
SysGeneral, which contains various functions which are not specific to
any sys* and simplifies those files. rootfs now also handles sysb and
sysc.

bootstrap.cfg also gives an indication whether we are running in a
chroot to avoid attempting to kexec/mount within a chroot.

sysc/bison-2.3/bison-2.3.sh

@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+
+    ../../import-gnulib.sh
+
+    AUTOPOINT=true autoreconf-2.69 -fi
+
+    # Remove pregenerated files
+    rm src/parse-gram.c src/parse-gram.h src/scan-skel.c src/scan-gram.c
+
+    # Remove pregenerated .info
+    rm doc/bison.info
+}
+
+src_configure() {
+    LEX=flex-2.5.33 ./configure \
+        --prefix="${PREFIX}" \
+        --program-suffix=-2.3 \
+        --datarootdir="${PREFIX}/share/bison-2.3"
+}
+
+src_compile() {
+    make MAKEINFO=true
+}
+
+src_install() {
+    make MAKEINFO=true DESTDIR="${DESTDIR}" install
+}

sysc/bison-2.3/checksums

@@ -0,0 +1 @@
+5f32418b2681b9c26a845689d9761f0c28bbaadce32c58d6b203f4ad8ebe0234  /image/bin/bison-2.3

sysc/bison-2.3/import-gnulib.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+set -e
+
+gnulib_modules='
+argmatch
+dirname
+error
+exitfail
+extensions
+getopt
+gettext
+hard-locale
+hash
+malloc
+mbswidth
+obstack
+quote
+quotearg
+stdbool
+stdio-safer
+strerror
+strtoul
+strverscmp
+unistd-safer
+unlocked-io
+verify
+xalloc
+xalloc-die
+xstrndup
+'
+
+# Copy over needed files
+for i in ${gnulib_modules}; do
+    for f in $(../gnulib-b28236b/gnulib-tool --extract-filelist "${i}") \
+        lib/wcwidth.h; do
+        cp -pf "../gnulib-b28236b/${f}" "./${f}"
+    done
+done
+
+# Generate the things
+(echo '# This file is generated automatically by "bootstrap".' &&
+ echo 'AC_DEFUN([GNULIB_AUTOCONF_SNIPPET],[' &&
+ ../gnulib-b28236b/gnulib-tool --extract-autoconf-snippet $gnulib_modules &&
+ echo '])'
+) > m4/gnulib.m4
+
+(echo '# This file is generated automatically by "bootstrap".' &&
+ ../gnulib-b28236b/gnulib-tool --extract-automake-snippet $gnulib_modules |
+ sed 's/^[	 ]*AM_CPPFLAGS[	 ]*+=/# (commented out by bootstrap) &/'
+) > lib/gnulib.mk

sysc/bison-2.3/patches/autover-mismatch.patch

@@ -0,0 +1,17 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+
+This macro does not exist in newer versions of autoconf and is unrequired.
+There is no version of autoconf supporting this project + gnulib + this macro.
+
+--- m4/po_gl.m4	2021-04-11 18:39:53.353069610 +1000
++++ m4/po_gl.m4	2021-04-11 18:40:20.422242498 +1000
+@@ -24,7 +24,6 @@
+ [
+   AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+   AC_REQUIRE([AC_PROG_INSTALL])dnl
+-  AC_REQUIRE([AM_MKINSTALLDIRS])dnl
+   AC_REQUIRE([AM_NLS])dnl
+ 
+   dnl Perform the following tests also if --disable-nls has been given,

sysc/bison-2.3/patches/fopen-safer.patch

@@ -0,0 +1,18 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+
+fopen-safer.c for whatever reason does not exist when added by gnulib.
+
+--- lib/Makefile.am	2021-04-11 19:01:01.265993928 +1000
++++ lib/Makefile.am	2021-04-11 19:01:40.413232722 +1000
+@@ -31,7 +31,8 @@
+ lib_SOURCES = \
+   get-errno.h get-errno.c \
+   subpipe.h subpipe.c \
+-  $(bitsets_sources) $(additional_bitsets_sources) $(timevars_sources)
++  $(bitsets_sources) $(additional_bitsets_sources) $(timevars_sources) \
++  fopen-safer.c
+ 
+ # Implementation of bitsets
+ bitsets_sources = \

sysc/bison-2.3/patches/gnulib-fix.patch

@@ -0,0 +1,17 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+
+This should be declared for gnulib, but for some reason is not, most likely
+use of a different version (but CVS history no longer exists).
+
+--- lib/Makefile.am	2021-04-11 13:49:09.414805465 +1000
++++ lib/Makefile.am	2021-04-11 13:49:26.418916036 +1000
+@@ -19,6 +19,7 @@
+ 
+ BUILT_SOURCES =
+ EXTRA_DIST =
++EXTRA_lib_SOURCES =
+ MOSTLYCLEANFILES =
+ 
+ lib_LIBRARIES = $(YACC_LIBRARY)

sysc/bison-2.3/patches/our-bison.patch

@@ -0,0 +1,20 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+
+This doesn't actually make sense, you can't use the built bison to bootstrap
+itself. Make it use our bison instead.
+
+--- src/Makefile.am	2021-04-10 21:37:11.570390316 +1000
++++ src/Makefile.am	2021-04-10 21:38:01.805804332 +1000
+@@ -23,10 +23,6 @@
+ 
+ LDADD = ../lib/libbison.a $(LIBINTL)
+ 
+-# Use our own Bison to build the parser.  Of course, you ought to
+-# keep a sane version of Bison nearby...
+-YACC = ../tests/bison -y
+-
+ bin_PROGRAMS = bison
+ bin_SCRIPTS = $(YACC_SCRIPT)
+ EXTRA_SCRIPTS = yacc