E-day build system changes.

- Moved most of the guts of Makefile to Makefile.inc1 to become the
  backend for the build system.
- The new Makefile doesn't suffer from problems including the wrong
  sys.mk because it doesn't use anything in there or bsd.own.mk. So,
  from now on, the proper build command is just `make world' (or
  buildworld).
- The intermediate makefiles called Makefile.inc0 and Makefile.upgrade
  fiddle with the OBJFORMAT and MAKEOBJDIRPREFIX variables so that
  both aout and elf object trees can coexist. Makefile.upgrade contains
  the aout->elf transition build.
- A cross build environment is now very close to reality. Specifying
  TOOLDIR, setting OBJFORMAT and MAKEOBJDIRPREFIX allow that.

See the comments in Makefile for more info.

4 files changed, 1393 insertions, 837 deletions

diff --git a/Makefile b/Makefile
index b65fe8f..4f6f61b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,875 +1,131 @@
 #
-#	$Id: Makefile,v 1.209 1998/08/04 17:13:38 bde Exp $
-#
-# While porting to the another architecture include the bootstrap instead
-# of the normal build.
-#
-.if exists(${.CURDIR}/Makefile.${MACHINE}) && defined(BOOTSTRAP_WORLD)
-.include "${.CURDIR}/Makefile.${MACHINE}"
-.else
-#
-# Make command line options:
-#	-DCLOBBER will remove /usr/include
-#	-DMAKE_KERBEROS4 to build KerberosIV
-#	-DNOCLEANDIR run ${MAKE} clean, instead of ${MAKE} cleandir
-#	-DNOCLEAN do not clean at all
-#	-DNOTOOLS do not rebuild any tools first
-#	-DNOCRYPT will prevent building of crypt versions
-#	-DNOLKM do not build loadable kernel modules
-#	-DNOOBJDIR do not run ``${MAKE} obj''
-#	-DNOPROFILE do not build profiled libraries
-#	-DNOSECURE do not go into secure subdir
-#	-DNOGAMES do not go into games subdir
-#	-DNOSHARE do not go into share subdir
-#	-DNOINFO do not make or install info files
-#	-DNOLIBC_R do not build libc_r.
-#	LOCAL_DIRS="list of dirs" to add additional dirs to the SUBDIR list
-
+#	$Id$
 #
-# The intended user-driven targets are:
-# buildworld  - rebuild *everything*, including glue to help do upgrades
-# installworld- install everything built by "buildworld"
-# world       - buildworld + installworld
-# update      - convenient way to update your source tree (eg: sup/cvs)
-# most        - build user commands, no libraries or include files
-# installmost - install user commands, no libraries or include files
-#
-# Standard targets (not defined here) are documented in the makefiles in
-# /usr/share/mk.  These include:
-#		obj depend all install clean cleandepend cleanobj
-
-.if (!make(world)) && (!make(buildworld)) && (!make(installworld))
-.MAKEFLAGS:=	-m ${.CURDIR}/share/mk ${.MAKEFLAGS}
-.endif
-
+# The user-driven targets are:
 #
-# Pick up any macros that are defined in the src-relative bsd.own.mk
-# but not in the "system" bsd.own.mk.  The "system" version has
-# unfortunately already been included by the "system" sys.mk, so this
-# only works for new macros.  First undefine old macros that cause
-# problems.
+# buildworld          - Rebuild *everything*, including glue to help do
+#                       upgrades.
+# installworld        - Install everything built by "buildworld".
+# world               - buildworld + installworld.
+# update              - Convenient way to update your source tree (cvs).
+# most                - Build user commands, no libraries or include files.
+# installmost         - Install user commands, no libraries or include files.
+# aout-to-elf         - Upgrade an system from a.out to elf format (see below).
+# aout-to-elf-build   - Build everything required to upgrade a system from
+#                       a.out to elf format (see below).
+# aout-to-elf-install - Install everything built by aout-to-elf-build (see
+#                       below).
 #
-.undef LIBDIR
-.include "${.CURDIR}/share/mk/bsd.own.mk"
-
-# Put initial settings here.
-SUBDIR=
-
-# We must do share/info early so that installation of info `dir'
-# entries works correctly.  Do it first since it is less likely to
-# grow dependencies on include and lib than vice versa.
-.if exists(share/info)
-SUBDIR+= share/info
-.endif
-
-# We must do include and lib early so that the perl *.ph generation
-# works correctly as it uses the header files installed by this.
-.if exists(include)
-SUBDIR+= include
-.endif
-.if exists(lib)
-SUBDIR+= lib
-.endif
-
-.if exists(bin)
-SUBDIR+= bin
-.endif
-.if exists(games) && !defined(NOGAMES)
-SUBDIR+= games
-.endif
-.if exists(gnu)
-SUBDIR+= gnu
-.endif
-.if exists(kerberosIV) && exists(crypto) && !defined(NOCRYPT) && \
-    defined(MAKE_KERBEROS4)
-SUBDIR+= kerberosIV
-.endif
-.if exists(libexec)
-SUBDIR+= libexec
-.endif
-.if exists(sbin)
-SUBDIR+= sbin
-.endif
-.if exists(share) && !defined(NOSHARE)
-SUBDIR+= share
-.endif
-.if exists(sys)
-SUBDIR+= sys
-.endif
-.if exists(usr.bin)
-SUBDIR+= usr.bin
-.endif
-.if exists(usr.sbin)
-SUBDIR+= usr.sbin
-.endif
-.if exists(secure) && !defined(NOCRYPT) && !defined(NOSECURE)
-SUBDIR+= secure
-.endif
-.if exists(lkm) && !defined(NOLKM)
-SUBDIR+= lkm
-.endif
-
-# etc must be last for "distribute" to work
-.if exists(etc)
-SUBDIR+= etc
-.endif
-
-# These are last, since it is nice to at least get the base system
-# rebuilt before you do them.
-.if defined(LOCAL_DIRS)
-.for _DIR in ${LOCAL_DIRS}
-.if exists(${_DIR}) & exists(${_DIR}/Makefile)
-SUBDIR+= ${_DIR}
-.endif
-.endfor
-.endif
-
-# Handle -DNOOBJDIR, -DNOCLEAN and -DNOCLEANDIR
-.if defined(NOOBJDIR)
-OBJDIR=
-.else
-OBJDIR=		obj
-.endif
-
-.if defined(NOCLEAN)
-CLEANDIR=
-.else
-.if defined(NOCLEANDIR)
-CLEANDIR=	clean cleandepend
-.else
-CLEANDIR=	cleandir
-.endif
-.endif
-
-.if !defined(NOCLEAN)
-_NODEPEND=	true
-.endif
-.if defined(_NODEPEND)
-_DEPEND=	cleandepend
-.else
-_DEPEND=	depend
-.endif
-
-SUP?=		cvsup
-SUPFLAGS?=	-g -L 2 -P -
-
+# This makefile is simple by design. The FreeBSD make automatically reads
+# the /usr/share/mk/sys.mk unless the -m argument is specified on the 
+# command line. By keeping this makefile simple, it doesn't matter too
+# much how different the installed mk files are from those in the source
+# tree. This makefile executes a child make process, forcing it to use
+# the mk files from the source tree which are supposed to DTRT.
 #
-# While building tools for bootstrapping, we don't need to waste time on
-# shared or profiled libraries, shared linkage, or documentation, except
-# when the tools won't get cleaned we must use the defaults for shared
-# libraries and shared linkage (and this doesn't waste time).
-# XXX actually, we do need to waste time building shared libraries.
-#
-.if defined(NOCLEAN)
-MK_FLAGS=	-DNOINFO -DNOMAN         -DNOPROFILE
-.else
-MK_FLAGS=	-DNOINFO -DNOMAN -DNOPIC -DNOPROFILE -DNOSHARED
-.endif
-
+# The user-driven targets (as listed above) are implemented in Makefile.inc0
+# and the private targets are in Makefile.inc1. These are kept separate
+# to help the bootstrap build from aout to elf format.
 #
-# world
-#
-# Attempt to rebuild and reinstall *everything*, with reasonable chance of
-# success, regardless of how old your existing system is.
-#
-# >> Beware, it overwrites the local build environment! <<
-#
-world:
-	@echo "--------------------------------------------------------------"
-	@echo "make world started on `LC_TIME=C date`"
-	@echo "--------------------------------------------------------------"
-.if target(pre-world)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Making 'pre-world' target"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${MAKE} pre-world
-.endif
-	cd ${.CURDIR}; ${MAKE} buildworld
-	cd ${.CURDIR}; ${MAKE} -B installworld
-.if target(post-world)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Making 'post-world' target"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${MAKE} post-world
-.endif
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo "make world completed on `LC_TIME=C date`"
-	@echo "--------------------------------------------------------------"
-
-.if defined(MAKEOBJDIRPREFIX)
-WORLDTMP=	${MAKEOBJDIRPREFIX}${.CURDIR}/tmp
-.else
-WORLDTMP=	/usr/obj${.CURDIR}/tmp
-.endif
-STRICTTMPPATH=	${WORLDTMP}/sbin:${WORLDTMP}/usr/sbin:${WORLDTMP}/bin:${WORLDTMP}/usr/bin
-TMPPATH=	${STRICTTMPPATH}:${PATH}
-
-# XXX COMPILER_PATH is needed for finding cc1, ld and as
-# XXX GCC_EXEC_PREFIX is for *crt.o.  It is probably unnecessary now
-#	that LIBRARY_PATH is set.  We still can't use -nostdlib, since gcc
-#	wouldn't link *crt.o or libgcc if it were used.
-# XXX LD_LIBRARY_PATH is for ld.so.  It is also used by ld, although we don't
-#	want that - all compile-time library paths should be resolved by gcc.
-#	It fails for set[ug]id executables (are any used?).
-COMPILER_ENV=	BISON_SIMPLE=${WORLDTMP}/usr/share/misc/bison.simple \
-		COMPILER_PATH=${WORLDTMP}/usr/libexec:${WORLDTMP}/usr/bin \
-		GCC_EXEC_PREFIX=${WORLDTMP}${SHLIBDIR}:${WORLDTMP}/usr/lib/ \
-		LD_LIBRARY_PATH=${WORLDTMP}${SHLIBDIR} \
-		LIBRARY_PATH=${WORLDTMP}${SHLIBDIR}:${WORLDTMP}/usr/lib
-
-BMAKEENV=	PATH=${TMPPATH} ${COMPILER_ENV} NOEXTRADEPEND=t \
-		OBJFORMAT_PATH=${WORLDTMP}/usr/libexec:/usr/libexec
-XMAKEENV=	PATH=${STRICTTMPPATH} ${COMPILER_ENV} \
-		OBJFORMAT_PATH=${WORLDTMP}/usr/libexec \
-		CFLAGS="-nostdinc ${CFLAGS}"	# XXX -nostdlib
-
-# used to compile and install 'make' in temporary build tree
-MAKETMP=	${WORLDTMP}/make
-IBMAKE=	${BMAKEENV} MAKEOBJDIR=${MAKETMP} ${MAKE} DESTDIR=${WORLDTMP}
-# bootstrap make
-BMAKE=	${BMAKEENV} ${WORLDTMP}/usr/bin/make DESTDIR=${WORLDTMP}
-# cross make used for compilation
-XMAKE=	${XMAKEENV} ${WORLDTMP}/usr/bin/make DESTDIR=${WORLDTMP}
-# cross make used for final installation
-IXMAKE=	${XMAKEENV} ${WORLDTMP}/usr/bin/make
-
+# For novices wanting to build from current sources, the simple instructions
+# are:
 #
-# buildworld
-#
-# Attempt to rebuild the entire system, with reasonable chance of
-# success, regardless of how old your existing system is.
-#
-buildworld:
-.if !defined(NOCLEAN)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Cleaning up the temporary build tree"
-	@echo "--------------------------------------------------------------"
-	mkdir -p ${WORLDTMP}
-	chflags -R noschg ${WORLDTMP}/
-	rm -rf ${WORLDTMP}
-.endif
-.if !defined(NOTOOLS)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Making make"
-	@echo "--------------------------------------------------------------"
-	mkdir -p ${WORLDTMP}/usr/bin ${MAKETMP}
-	( \
-	cd ${.CURDIR}/usr.bin/make; \
-		MAKEOBJDIRPREFIX=""; unset MAKEOBJDIRPREFIX; \
-		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} all; \
-		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} install; \
-		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} clean \
-	)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Making mtree"
-	@echo "--------------------------------------------------------------"
-	mkdir -p ${WORLDTMP}/usr/sbin ${WORLDTMP}/mtree
-	( \
-	cd ${.CURDIR}/usr.sbin/mtree; \
-		MAKEOBJDIRPREFIX=""; unset MAKEOBJDIRPREFIX; \
-		export MAKEOBJDIR=${WORLDTMP}/mtree; \
-		${BMAKE} ${MK_FLAGS} all; \
-		${BMAKE} ${MK_FLAGS} -B install clean \
-	)
-.endif
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Making hierarchy"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} hierarchy
-.if !defined(NOCLEAN)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Cleaning up the obj tree"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} ${CLEANDIR:S/^/par-/}
-.endif
-.if !defined(NOOBJDIR)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding the obj tree"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} par-${OBJDIR}
-.endif
-.if !defined(NOTOOLS)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding bootstrap tools"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} bootstrap
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding tools necessary to build the include files"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} include-tools
-.endif
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding ${DESTDIR}/usr/include"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; SHARED=copies ${BMAKE} includes
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding bootstrap libraries"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} bootstrap-libraries
-.if !defined(NOTOOLS)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding tools needed to build libraries"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} lib-tools
-.endif
-.if !defined(NOTOOLS)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding all other tools needed to build the world"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${BMAKE} build-tools
-.endif
-.if !defined(_NODEPEND)
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding dependencies"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${XMAKE} par-depend
-.endif
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Building libraries"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${XMAKE} -DNOINFO -DNOMAN libraries
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Building everything.."
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${XMAKE} all
-
+# 1.  Ensure that your /usr/obj directory has at least 165 Mb of free space.
+# 2.  `cd /usr/src'  (or to the directory containing your source tree).
+# 3.  `make world'
 #
-# installworld
+# Be warned, this will update your installed system, except for configuration
+# files in the /etc directory. You have to do those manually.
 #
-# Installs everything compiled by a 'buildworld'.
+# If at first you're a little nervous about having a `make world' update
+# your system, a `make buildworld' will build everything in the /usr/obj
+# tree without touching your installed system. To be of any further use
+# though, a `make installworld' is required.
 #
-installworld:
-	cd ${.CURDIR}; ${IXMAKE} reinstall
-
+# The `make world' process always follows the installed object format.
+# This is set by creating /etc/objformat containing either OBJFORMAT=aout
+# or OBJFORMAT=elf. If this file does not exist, the object format defaults
+# to aout. This is expected to be changed to elf just prior to the release
+# or 3.0. If OBJFORMAT is set as an environment variable or in /etc/make.conf,
+# this overrides /etc/objformat.
 #
-# reinstall
-#
-# If you have a build server, you can NFS mount the source and obj directories
-# and do a 'make reinstall' on the *client* to install new binaries from the
-# most recent server build.
-#
-reinstall:
-	@echo "--------------------------------------------------------------"
-	@echo " Making hierarchy"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${MAKE} hierarchy
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Installing everything.."
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; ${MAKE} install
-.if ${MACHINE_ARCH} == "i386"
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Re-scanning the shared libraries.."
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; /sbin/ldconfig -R
-.endif
-	@echo
-	@echo "--------------------------------------------------------------"
-	@echo " Rebuilding man page indexes"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}/share/man; ${MAKE} makedb
-
+# Unless -DNOAOUT is specified, a `make world' with OBJFORMAT=elf will
+# update the legacy support for aout. This includes all libraries, ld.so,
+# lkms and boot objects. This part of build should be regarded as
+# deprecated and you should _not_ expect to be able to do this past the
+# release of 3.1. You have exactly one major release to move entirely
+# to elf.
 #
-# update
-#
-# Update the source tree, by running sup and/or running cvs to update to the
-# latest copy.
-#
-update:
-.if defined(SUP_UPDATE)
-	@echo "--------------------------------------------------------------"
-	@echo "Running ${SUP}"
-	@echo "--------------------------------------------------------------"
-	@${SUP} ${SUPFLAGS} ${SUPFILE}
-.if defined(SUPFILE1)
-	@${SUP} ${SUPFLAGS} ${SUPFILE1}
-.endif
-.if defined(SUPFILE2)
-	@${SUP} ${SUPFLAGS} ${SUPFILE2}
-.endif
-.endif
-.if defined(CVS_UPDATE)
-	@echo "--------------------------------------------------------------"
-	@echo "Updating /usr/src from cvs repository" ${CVSROOT}
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}; cvs -q update -P -d
-.endif
-
-#
-# most
-#
-# Build most of the user binaries on the existing system libs and includes.
-#
-most:
-	@echo "--------------------------------------------------------------"
-	@echo " Building programs only"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}/bin;		${MAKE} all
-	cd ${.CURDIR}/sbin;		${MAKE} all
-	cd ${.CURDIR}/libexec;		${MAKE} all
-	cd ${.CURDIR}/usr.bin;		${MAKE} all
-	cd ${.CURDIR}/usr.sbin;		${MAKE} all
-	cd ${.CURDIR}/gnu/libexec;	${MAKE} all
-	cd ${.CURDIR}/gnu/usr.bin;	${MAKE} all
-	cd ${.CURDIR}/gnu/usr.sbin;	${MAKE} all
-#.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT)
-#	cd ${.CURDIR}/kerberosIV;	${MAKE} most
-#.endif
-#.if !defined(NOSECURE) && !defined(NOCRYPT)
-#	cd ${.CURDIR}/secure;		${MAKE} most
-#.endif
-
+# ----------------------------------------------------------------------------
 #
-# installmost
-#
-# Install the binaries built by the 'most' target.  This does not include
-# libraries or include files.
-#
-installmost:
-	@echo "--------------------------------------------------------------"
-	@echo " Installing programs only"
-	@echo "--------------------------------------------------------------"
-	cd ${.CURDIR}/bin;		${MAKE} install
-	cd ${.CURDIR}/sbin;		${MAKE} install
-	cd ${.CURDIR}/libexec;		${MAKE} install
-	cd ${.CURDIR}/usr.bin;		${MAKE} install
-	cd ${.CURDIR}/usr.sbin;		${MAKE} install
-	cd ${.CURDIR}/gnu/libexec;	${MAKE} install
-	cd ${.CURDIR}/gnu/usr.bin;	${MAKE} install
-	cd ${.CURDIR}/gnu/usr.sbin;	${MAKE} install
-#.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT)
-#	cd ${.CURDIR}/kerberosIV;	${MAKE} installmost
-#.endif
-#.if !defined(NOSECURE) && !defined(NOCRYPT)
-#	cd ${.CURDIR}/secure;		${MAKE} installmost
-#.endif
-
+#           Upgrading an i386 system from a.out to elf format
 #
-# ------------------------------------------------------------------------
 #
-# From here onwards are utility targets used by the 'make world' and
-# related targets.  If your 'world' breaks, you may like to try to fix
-# the problem and manually run the following targets to attempt to
-# complete the build.  Beware, this is *not* guaranteed to work, you
-# need to have a pretty good grip on the current state of the system
-# to attempt to manually finish it.  If in doubt, 'make world' again.
+# The aout->elf transition build is performed by doing a `make aout-to-elf'
+# or a `make aout-to-elf-build' followed by a `make aout-to-elf-install'.
+# You need to have at least 320 Mb of free space for the object tree.
 #
-
+# The upgrade process checks the installed release. If this is 3.0-CURRENT,
+# it is assumed that your kernel contains all the syscalls required by the
+# current sources.
 #
-# heirarchy - ensure that all the needed directories are present
+# For installed systems where `uname -r' reports something other than
+# 3.0-CURRENT, the upgrade process expects to build a kernel using the
+# kernel configuration file sys/i386/conf/GENERICupgrade. This file is
+# defaulted to the GENERIC kernel configuration file on the assumption that
+# it will be suitable for most systems. Before performing the upgrade,
+# replace sys/i386/conf/GENERICupgrade with your own version if your
+# hardware requires a different configuration.
 #
-hierarchy:
-	cd ${.CURDIR}/etc;		${MAKE} distrib-dirs
-
+# The upgrade procedure will stop and ask for confirmation to proceed
+# several times. On each occasion, you can type Ctrl-C to abort the
+# upgrade.
 #
-# bootstrap - [re]build tools needed to run the actual build, this includes
-# tools needed by 'make depend', as some tools are needed to generate source
-# for the dependency information to be gathered from.
-#
-bootstrap:
-.if defined(DESTDIR)
-	rm -f ${DESTDIR}/usr/src/sys
-	ln -s ${.CURDIR}/sys ${DESTDIR}/usr/src
-	cd ${.CURDIR}/include; find -dx . | cpio -dump ${DESTDIR}/usr/include
-.for d in net netinet posix4 sys vm machine
-	if [ -h ${DESTDIR}/usr/include/$d ]; then \
-		rm -f ${DESTDIR}/usr/include/$d ; \
-	fi
-.endfor
-	cd ${.CURDIR}/sys; \
-		find -dx net netinet posix4 sys vm -name '*.h' -o -type d | \
-		cpio -dump ${DESTDIR}/usr/include
-	mkdir -p ${DESTDIR}/usr/include/machine
-	cd ${.CURDIR}/sys/${MACHINE_ARCH}/include; find -dx . -name '*.h' -o -type d | \
-		cpio -dump ${DESTDIR}/usr/include/machine
-.endif
-	cd ${.CURDIR}/usr.bin/make; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-	cd ${.CURDIR}/usr.bin/xinstall; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-	cd ${.CURDIR}/usr.bin/yacc; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-	cd ${.CURDIR}/usr.bin/lex; ${MAKE} bootstrap; \
-		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} -DNOLIB all; \
-		${MAKE} ${MK_FLAGS} -DNOLIB -B install ${CLEANDIR}
-.if !defined(NOOBJDIR)
-	cd ${.CURDIR}/usr.bin/lex; ${MAKE} ${OBJDIR}
-.endif
-	cd ${.CURDIR}/usr.sbin/mtree; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-.if defined(DESTDIR)
-	cd ${.CURDIR}/include && ${MAKE} copies
-.endif
-
+# At the end of the upgrade procedure, /etc/objformat is created or
+# updated to contain OBJFORMAT=elf. From then on, you're elf by default.
 #
-# include-tools - generally the same as 'bootstrap', except that it's for
-# things that are specifically needed to generate include files.
+# ----------------------------------------------------------------------------
 #
-# XXX should be merged with bootstrap, it's not worth keeeping them separate.
-# Well, maybe it is now.  We force 'cleandepend' here to avoid dependencies
-# on cleaned away headers in ${WORLDTMP}.
 #
-include-tools:
-.for d in usr.bin/compile_et usr.bin/rpcgen
-	cd ${.CURDIR}/$d; ${MAKE} cleandepend; \
-		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-.endfor
-
+# Define the user-driven targets. These are listed here in alphabetical
+# order, but that's not important.
 #
-# includes - possibly generate and install the include files.
-#
-includes:
-.if defined(CLOBBER)
-	rm -rf ${DESTDIR}/usr/include/*
-	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.include.dist \
-		-p ${DESTDIR}/usr/include
-.endif
-	cd ${.CURDIR}/include;			${MAKE} -B all install
-	cd ${.CURDIR}/gnu/include;		${MAKE} install
-	cd ${.CURDIR}/gnu/lib/libmp;		${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libobjc;		${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libreadline;	${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libregex;		${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libstdc++;	${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libg++;		${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libdialog;	${MAKE} beforeinstall
-	cd ${.CURDIR}/gnu/lib/libgmp;		${MAKE} beforeinstall
-.if exists(secure) && !defined(NOCRYPT)
-	cd ${.CURDIR}/secure/lib/libdes;	${MAKE} beforeinstall
-.endif
-.if exists(kerberosIV) && !defined(NOCRYPT) && defined(MAKE_KERBEROS4)
-	cd ${.CURDIR}/kerberosIV/lib/libacl;	${MAKE} beforeinstall
-	cd ${.CURDIR}/kerberosIV/lib/libkadm;	${MAKE} beforeinstall
-	cd ${.CURDIR}/kerberosIV/lib/libkafs;	${MAKE} beforeinstall
-	cd ${.CURDIR}/kerberosIV/lib/libkdb;	${MAKE} beforeinstall
-	cd ${.CURDIR}/kerberosIV/lib/libkrb;	${MAKE} beforeinstall
-	cd ${.CURDIR}/kerberosIV/lib/libtelnet; ${MAKE} beforeinstall
-.else
-	cd ${.CURDIR}/lib/libtelnet;		${MAKE} beforeinstall
-.endif
-.if exists(${.CURDIR}/lib/csu/${MACHINE})
-	cd ${.CURDIR}/lib/csu/${MACHINE};	${MAKE} beforeinstall
-.endif
-	cd ${.CURDIR}/lib/libalias;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libc;			${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libcalendar;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libcurses;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libdisk;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libedit;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libftpio;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libmd;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libmytinfo;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libncurses;		${MAKE} beforeinstall
-.if !defined(WANT_CSRG_LIBM)
-	cd ${.CURDIR}/lib/msun;			${MAKE} beforeinstall
-.endif
-	cd ${.CURDIR}/lib/libopie;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libpcap;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/librpcsvc;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libskey;		${MAKE} beforeinstall
-.if !defined(NOTCL) && exists (${.CURDIR}/contrib/tcl) && \
-	exists(${.CURDIR}/usr.bin/tclsh) && exists (${.CURDIR}/lib/libtcl)
-	cd ${.CURDIR}/lib/libtcl;		${MAKE} installhdrs
-.endif
-	cd ${.CURDIR}/lib/libtermcap;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libcom_err;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libss;		${MAKE} -B hdrs beforeinstall
-	cd ${.CURDIR}/lib/libscsi;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libutil;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libvgl;		${MAKE} beforeinstall
-	cd ${.CURDIR}/lib/libz;			${MAKE} beforeinstall
-	cd ${.CURDIR}/usr.bin/f2c;		${MAKE} beforeinstall
-	cd ${.CURDIR}/usr.bin/lex;		${MAKE} beforeinstall
+TGTS =	all buildworld depend everything includes installmost install \
+	installworld most obj update world
 
 #
-# Declare tools if they are not required on all architectures.
-#
-.if ${MACHINE_ARCH} == "i386"
-# aout tools:
-_aout_ar	= usr.bin/ar
-_aout_as	= gnu/usr.bin/as
-_aout_ld	= gnu/usr.bin/ld
-_aout_nm	= usr.bin/nm
-_aout_ranlib	= usr.bin/ranlib
-_aout_size	= usr.bin/size
-_aout_strip	= usr.bin/strip
-.endif
-
+# Handle the user-driven targets, using the source relative mk files.
 #
-# lib-tools - build tools to compile and install the libraries.
-#
-# XXX gperf is required for cc
-# XXX a new ld and tsort is required for cc
-lib-tools:
-.for d in				\
-		gnu/usr.bin/gperf	\
-		${_aout_ld}		\
-		usr.bin/tsort		\
-		${_aout_as}		\
-		gnu/usr.bin/bison	\
-		gnu/usr.bin/cc		\
-		${_aout_ar}		\
-		usr.bin/env		\
-		usr.bin/lex/lib		\
-		usr.bin/mk_cmds		\
-		${_aout_nm}		\
-		${_aout_ranlib}		\
-		${_aout_strip}		\
-		gnu/usr.bin/binutils	\
-		usr.bin/uudecode	\
-		usr.bin/objformat
-	cd ${.CURDIR}/$d; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install; \
-		${MAKE} ${MK_FLAGS:S/-DNOPIC//} -B ${CLEANDIR} ${OBJDIR}
-.endfor
+${TGTS} : upgrade_checks
+	@cd ${.CURDIR}; \
+		make -f Makefile.inc0 -m ${.CURDIR}/share/mk ${.TARGET}
 
 #
-# We have to know too much about ordering and subdirs in the lib trees:
+# Perform a few tests to determine if the installed tools are adequate
+# for building the world. These are for older systems (prior to 2.2.5).
 #
-# To satisfy shared library linkage when only the libraries being built
-# are visible:
+# From 2.2.5 onwards, the installed tools will pass these upgrade tests,
+# so the normal make world is capable of doing what is required to update
+# the system to current.
 #
-# libcom_err must be built before libss.
-# libcrypt and libmd must be built before libskey.
-# libm must be built before libtcl.
-# libmytinfo must be built before libdialog and libncurses.
-# libncurses must be built before libdialog.
-# libtermcap must be built before libcurses, libedit and libreadline.
+upgrade_checks :
+	@cd ${.CURDIR}; if `make -m ${.CURDIR}/share/mk test > /dev/null 2>&1`; then ok=1; else make -f Makefile.upgrade make; fi;
+
 #
-# Some libraries are built conditionally and/or are in inconsistently
-# named directories:
+# A simple test target used as part of the test to see if make supports
+# the -m argument.
 #
-.if exists(lib/csu/${MACHINE}.pcc)
-_csu=lib/csu/${MACHINE}.pcc
-.else
-_csu=lib/csu/${MACHINE}
-.endif
-
-.if !defined(NOSECURE) && !defined(NOCRYPT)
-_libcrypt=	secure/lib/libcrypt lib/libcrypt
-.else
-_libcrypt=	lib/libcrypt
-.endif
-
-.if defined(WANT_CSRG_LIBM)
-_libm=	lib/libm
-.else
-_libm=	lib/msun
-.endif
+test	:
 
 #
-# bootstrap-libraries - build just enough libraries for the bootstrap
-# tools, and install them under ${WORLDTMP}.
-#
-# Build csu and libgcc early so that some tools get linked to the new
-# versions (too late for the main tools, however).  Then build the
-# necessary prerequisite libraries (libtermcap just needs to be before
-# libcurses, and this only matters for the NOCLEAN case when NOPIC is
-# not set).
-#
-# This is mostly wrong.  The build tools must run on the host system,
-# so they should use host libraries.  We depend on the target being
-# similar enough to the host for new target libraries to work on the
-# host.
-#
-bootstrap-libraries:
-.for _lib in ${_csu} gnu/usr.bin/cc/libgcc lib/libtermcap \
-    gnu/lib/libregex gnu/lib/libreadline lib/libc \
-    ${_libcrypt} lib/libcurses lib/libedit ${_libm} \
-    lib/libmd lib/libutil lib/libz usr.bin/lex/lib
-.if exists(${.CURDIR}/${_lib})
-	cd ${.CURDIR}/${_lib}; \
-		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
-		${MAKE} ${MK_FLAGS} all; \
-		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
-.endif
-.endfor
-
+# Define the upgrade targets. These are listed here in alphabetical
+# order, but that's not important.
 #
-# libraries - build all libraries, and install them under ${DESTDIR}.
-#
-# The ordering is not as special as for bootstrap-libraries.  Build
-# the prerequisites first, then build almost everything else in
-# alphabetical order.
-#
-libraries:
-.for _lib in lib/libcom_err ${_libcrypt} ${_libm} lib/libmytinfo \
-    lib/libncurses lib/libtermcap \
-    gnu/lib gnu/usr.bin/cc/libgcc lib usr.bin/lex/lib usr.sbin/pcvt/keycap
-.if exists(${.CURDIR}/${_lib})
-	cd ${.CURDIR}/${_lib}; ${MAKE} all; ${MAKE} -B install
-.endif
-.endfor
-.if exists(${.CURDIR}/secure/lib) && !defined(NOCRYPT) && !defined(NOSECURE)
-	cd ${.CURDIR}/secure/lib; ${MAKE} all; ${MAKE} -B install
-.endif
-.if exists(${.CURDIR}/kerberosIV/lib) && !defined(NOCRYPT) && \
-    defined(MAKE_KERBEROS4)
-	cd ${.CURDIR}/kerberosIV/lib; ${MAKE} all; ${MAKE} -B install
-.endif
+UPGRADE =	aout-to-elf aout-to-elf-build aout-to-elf-install
 
 #
-# Exclude unused tools from build-tools.
-#
-.if !defined(NOGAMES) && exists(${.CURDIR}/games)
-_adventure=	games/adventure
-_caesar=	games/caesar
-_hack=		games/hack
-_phantasia=	games/phantasia
-_strfile=	games/fortune/strfile
-.endif
-.if !defined(NOPERL)
-_perl=		gnu/usr.bin/perl/perl
-.endif
-.if !defined(NOSHARE) && exists(${.CURDIR}/share)
-_scrnmaps=	share/syscons/scrnmaps
-.endif
-.if !defined(NOLKM) && exists(${.CURDIR}/lkm)
-_linux=		lkm/linux
-.endif
-
-BTMAKEFLAGS=	${MK_FLAGS} -D_BUILD_TOOLS
-
+# Handle the upgrade targets, using the source relative mk files.
 #
-# build-tools - build and install any other tools needed to complete the
-# compile and install.
-# ifdef stale
-# bc and cpp are required to build groff.  Otherwise, the order here is
-# mostly historical, i.e., bogus.
-# chmod is used to build gcc's tmpmultilib[2] at obscure times.
-# endif stale
-# XXX uname is a bug - the target should not depend on the host.
-#
-build-tools:
-.for d in				\
-		bin/cat 		\
-		bin/chmod		\
-		bin/cp 			\
-		bin/date		\
-		bin/dd			\
-		bin/echo		\
-		bin/expr		\
-		bin/hostname		\
-		bin/ln			\
-		bin/ls			\
-		bin/mkdir		\
-		bin/mv			\
-		bin/rm			\
-		bin/test		\
-		${_caesar}		\
-		${_strfile}		\
-		gnu/usr.bin/awk		\
-		gnu/usr.bin/bc		\
-		gnu/usr.bin/grep	\
-		gnu/usr.bin/groff	\
-		gnu/usr.bin/gzip	\
-		gnu/usr.bin/man/makewhatis	\
-		gnu/usr.bin/patch	\
-		${_perl}		\
-		gnu/usr.bin/sort	\
-		gnu/usr.bin/texinfo	\
-		usr.bin/basename	\
-		usr.bin/cap_mkdb	\
-		usr.bin/chflags		\
-		usr.bin/cmp		\
-		usr.bin/col		\
-		usr.bin/colldef		\
-		usr.bin/cpp		\
-		usr.bin/expand		\
-		usr.bin/file2c		\
-		usr.bin/find		\
-		usr.bin/gencat		\
-		usr.bin/id		\
-		usr.bin/join		\
-		usr.bin/lorder		\
-		usr.bin/m4		\
-		usr.bin/mkdep		\
-		usr.bin/mklocale	\
-		usr.bin/paste		\
-		usr.bin/sed		\
-		${_aout_size}		\
-		usr.bin/soelim		\
-		usr.bin/symorder	\
-		usr.bin/touch		\
-		usr.bin/tr		\
-		usr.bin/true		\
-		usr.bin/uname		\
-		usr.bin/uuencode	\
-		usr.bin/vgrind		\
-		usr.bin/vi		\
-		usr.bin/wc		\
-		usr.bin/xargs		\
-		usr.bin/yacc		\
-		usr.sbin/chown		\
-		usr.sbin/mtree		\
-		usr.sbin/zic		\
-		bin/sh
-	cd ${.CURDIR}/$d; ${MAKE} ${BTMAKEFLAGS} ${_DEPEND}; \
-		${MAKE} ${BTMAKEFLAGS} all; \
-		${MAKE} ${BTMAKEFLAGS} -B install ${CLEANDIR} ${OBJDIR}
-.endfor
-.if !defined(NOGAMES) && exists(${.CURDIR}/games)
-	cd ${DESTDIR}/usr/games; cp -p caesar strfile ${DESTDIR}/usr/bin
-.endif
-.for d in				\
-		bin/sh			\
-		${_adventure}		\
-		${_hack}		\
-		${_phantasia}		\
-		gnu/usr.bin/cc/cc_tools	\
-		lib/libmytinfo		\
-		${_linux}		\
-		${_scrnmaps}		\
-		sys/i386/boot/netboot
-	cd ${.CURDIR}/$d; ${MAKE} ${BTMAKEFLAGS} build-tools
-.endfor
-	cd ${.CURDIR}/usr.bin/tn3270/tools; ${MAKE} ${BTMAKEFLAGS} all
-
-.for __target in clean cleandepend cleandir depend obj
-.for entry in ${SUBDIR}
-${entry}.${__target}__D: .PHONY
-	@if test -d ${.CURDIR}/${entry}.${MACHINE}; then \
-		${ECHODIR} "===> ${DIRPRFX}${entry}.${MACHINE}"; \
-		edir=${entry}.${MACHINE}; \
-		cd ${.CURDIR}/$${edir}; \
-	else \
-		${ECHODIR} "===> ${DIRPRFX}${entry}"; \
-		edir=${entry}; \
-		cd ${.CURDIR}/$${edir}; \
-	fi; \
-	${MAKE} ${__target} DIRPRFX=${DIRPRFX}$${edir}/
-.endfor
-par-${__target}: ${SUBDIR:S/$/.${__target}__D/}
-.endfor
-
-.endif
-
-.include <bsd.subdir.mk>
+${UPGRADE} : upgrade_checks
+	@cd ${.CURDIR}; \
+		make -f Makefile.upgrade -m ${.CURDIR}/share/mk ${.TARGET}
diff --git a/Makefile.inc0 b/Makefile.inc0
new file mode 100644
index 0000000..2be6fdf
--- /dev/null
+++ b/Makefile.inc0
@@ -0,0 +1,109 @@
+#
+#	$Id$
+#
+# This makefile ensures that the object directory is set according to the
+# object format to avoid mixing aout and elf formatted files during the
+# transition period.
+#
+# >> Beware, this makefile  overwrites the local build environment! <<
+#
+
+#
+# Build things relative to the user's preferred object directory,
+# defaulting to /usr/obj if not defined.
+#
+MAKEOBJDIRPREFIX?=/usr/obj
+
+#
+# Variables passed to make work better if they are set as environment
+# variables instead of command line options.
+#
+MK_ENV=	MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/${OBJFORMAT}
+
+#
+# We should always use the current set of mk files, not the installed ones.
+# This makefile is a wrapper for the backend makefile (Makefile.inc1).
+#
+MAKE=	make -m ${.CURDIR}/share/mk -f Makefile.inc1
+
+#
+# These are the backend targets.
+#
+BKTGTS=	all depend everything includes install installmost most obj update
+
+
+#
+# A generic rule for the backend targets.
+#
+${BKTGTS} :
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} ${.TARGET}
+
+#
+# Temporary path and environment for the legacy build.
+#
+ELFTMPPATH=	${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp/sbin:${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp/bin:${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp/usr/sbin:${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp/usr/bin:${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp/usr/games
+LEGACY_ENV=	MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/aout	\
+		PATH=${ELFTMPPATH} OBJFORMAT=aout NOTOOLS=1	\
+		TOOLROOT=${MAKEOBJDIRPREFIX}/elf${.CURDIR}/tmp
+
+#
+# world
+#
+# Attempt to rebuild and reinstall *everything*, with reasonable chance of
+# success, regardless of how old your existing system is. If building on
+# an i386/elf system, build the aout legacy cruft too.
+#
+world:
+	@echo "--------------------------------------------------------------"
+	@echo " ${OBJFORMAT} make world started on `LC_TIME=C date`"
+	@echo "--------------------------------------------------------------"
+.if target(pre-world)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making 'pre-world' target"
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} pre-world
+.endif
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} buildworld
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "elf" && !defined(NOAOUT)
+	@cd ${.CURDIR}; ${LEGACY_ENV} ${MAKE} legacy-build
+.endif
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} -B installworld
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "elf" && !defined(NOAOUT)
+	@cd ${.CURDIR}; ${LEGACY_ENV} ${MAKE} legacy-install
+.endif
+.if target(post-world)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making 'post-world' target"
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} post-world
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " ${OBJFORMAT} make world completed on `LC_TIME=C date`"
+	@echo "--------------------------------------------------------------"
+
+#
+# buildworld
+#
+# Build the world in the current object format, plus the legacy aout
+# support if the current object format is elf on i386.
+#
+buildworld	:
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} buildworld
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "elf" && !defined(NOAOUT)
+	@cd ${.CURDIR}; ${LEGACY_ENV} ${MAKE} legacy-build
+.endif
+
+#
+# installworld
+#
+# Install the world in the current object format, plus the legacy aout
+# support if the current object format is elf on i386.
+#
+installworld	:
+	@cd ${.CURDIR}; ${MK_ENV} ${MAKE} installworld
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "elf" && !defined(NOAOUT)
+	@cd ${.CURDIR}; ${LEGACY_ENV} ${MAKE} -DNOMAN -DNOINFO legacy-install
+.endif
diff --git a/Makefile.inc1 b/Makefile.inc1
new file mode 100644
index 0000000..2d04a86
--- /dev/null
+++ b/Makefile.inc1
@@ -0,0 +1,961 @@
+#
+#	$Id: Makefile,v 1.209 1998/08/04 17:13:38 bde Exp $
+#
+# Make command line options:
+#	-DCLOBBER will remove /usr/include
+#	-DMAKE_KERBEROS4 to build KerberosIV
+#	-DNOCLEANDIR run ${MAKE} clean, instead of ${MAKE} cleandir
+#	-DNOCLEAN do not clean at all
+#	-DNOTOOLS do not rebuild any tools first
+#	-DNOCRYPT will prevent building of crypt versions
+#	-DNOLKM do not build loadable kernel modules
+#	-DNOPROFILE do not build profiled libraries
+#	-DNOSECURE do not go into secure subdir
+#	-DNOGAMES do not go into games subdir
+#	-DNOSHARE do not go into share subdir
+#	-DNOINFO do not make or install info files
+#	-DNOLIBC_R do not build libc_r.
+#	LOCAL_DIRS="list of dirs" to add additional dirs to the SUBDIR list
+
+#
+# The intended user-driven targets are:
+# buildworld  - rebuild *everything*, including glue to help do upgrades
+# installworld- install everything built by "buildworld"
+# update      - convenient way to update your source tree (eg: sup/cvs)
+# most        - build user commands, no libraries or include files
+# installmost - install user commands, no libraries or include files
+#
+# Standard targets (not defined here) are documented in the makefiles in
+# /usr/share/mk.  These include:
+#		obj depend all install clean cleandepend cleanobj
+
+# Put initial settings here.
+SUBDIR=
+
+# We must do share/info early so that installation of info `dir'
+# entries works correctly.  Do it first since it is less likely to
+# grow dependencies on include and lib than vice versa.
+.if exists(share/info)
+SUBDIR+= share/info
+.endif
+
+# We must do include and lib early so that the perl *.ph generation
+# works correctly as it uses the header files installed by this.
+.if exists(include)
+SUBDIR+= include
+.endif
+.if exists(lib)
+SUBDIR+= lib
+.endif
+
+.if exists(bin)
+SUBDIR+= bin
+.endif
+.if exists(games) && !defined(NOGAMES)
+SUBDIR+= games
+.endif
+.if exists(gnu)
+SUBDIR+= gnu
+.endif
+.if exists(kerberosIV) && exists(crypto) && !defined(NOCRYPT) && \
+    defined(MAKE_KERBEROS4)
+SUBDIR+= kerberosIV
+.endif
+.if exists(libexec)
+SUBDIR+= libexec
+.endif
+.if exists(sbin)
+SUBDIR+= sbin
+.endif
+.if exists(share) && !defined(NOSHARE)
+SUBDIR+= share
+.endif
+.if exists(sys)
+SUBDIR+= sys
+.endif
+.if exists(usr.bin)
+SUBDIR+= usr.bin
+.endif
+.if exists(usr.sbin)
+SUBDIR+= usr.sbin
+.endif
+.if exists(secure) && !defined(NOCRYPT) && !defined(NOSECURE)
+SUBDIR+= secure
+.endif
+.if exists(lkm) && !defined(NOLKM) && ${OBJFORMAT} == "aout"
+SUBDIR+= lkm
+.endif
+
+# etc must be last for "distribute" to work
+.if exists(etc)
+SUBDIR+= etc
+.endif
+
+# These are last, since it is nice to at least get the base system
+# rebuilt before you do them.
+.if defined(LOCAL_DIRS)
+.for _DIR in ${LOCAL_DIRS}
+.if exists(${_DIR}) & exists(${_DIR}/Makefile)
+SUBDIR+= ${_DIR}
+.endif
+.endfor
+.endif
+
+OBJDIR=		obj
+
+.if defined(NOCLEAN)
+CLEANDIR=
+.else
+.if defined(NOCLEANDIR)
+CLEANDIR=	clean cleandepend
+.else
+CLEANDIR=	cleandir
+.endif
+.endif
+
+.if !defined(NOCLEAN)
+_NODEPEND=	true
+.endif
+.if defined(_NODEPEND)
+_DEPEND=	cleandepend
+.else
+_DEPEND=	depend
+.endif
+
+SUP?=		cvsup
+SUPFLAGS?=	-g -L 2 -P -
+
+#
+# While building tools for bootstrapping, we don't need to waste time on
+# shared or profiled libraries, shared linkage, or documentation, except
+# when the tools won't get cleaned we must use the defaults for shared
+# libraries and shared linkage (and this doesn't waste time).
+# XXX actually, we do need to waste time building shared libraries.
+#
+.if defined(NOCLEAN)
+MK_FLAGS=	-DNOINFO -DNOMAN         -DNOPROFILE
+.else
+MK_FLAGS=	-DNOINFO -DNOMAN -DNOPIC -DNOPROFILE -DNOSHARED
+.endif
+
+#
+# Define the location of the temporary installation directory. Note that
+# MAKEOBJDIRPREFIX normally isn't defined so if the current directory is
+# /usr/src, then the world temporary directory is /usr/obj/usr/src/tmp.
+#
+# During the transition from aout to elf format on i386, MAKEOBJDIRPREFIX
+# is set by the parent makefile (Makefile.inc0) to be /usr/obj/${OBJFORMAT}
+# in order to keep aout and elf format files apart.
+#
+.if defined(MAKEOBJDIRPREFIX)
+WORLDTMP=	${MAKEOBJDIRPREFIX}${.CURDIR}/tmp
+.else
+WORLDTMP=	/usr/obj${.CURDIR}/tmp
+.endif
+
+#
+# Define the PATH to the build tools.
+#
+# If not building tools, the PATH always points to the installed binaries.
+# The NOTOOLS option assumes that in installed tools are good enough and that
+# the user's PATH will locate to appropriate tools. This option is required
+# for a cross-compiled build environment.
+#
+# If building tools, then the PATH includes the world temporary directories
+# so that the bootstrapped tools are used as soon as they are built. The
+# strict path is for use after all tools are supposed to have been
+# bootstrapped. It doesn't allow any of the installed tools to be used.
+#
+.if	defined(NOTOOLS)
+# Default root of the tool tree
+TOOLROOT?=	
+# Choose the PATH relative to the root of the tool tree
+PATH=		${TOOLROOT}/sbin:${TOOLROOT}/bin:${TOOLROOT}/usr/sbin:${TOOLROOT}/usr/bin:${TOOLROOT}/usr/games
+.else
+TOOLROOT=	${WORLDTMP}
+.endif
+STRICTTMPPATH=	${TOOLROOT}/sbin:${TOOLROOT}/usr/sbin:${TOOLROOT}/bin:${TOOLROOT}/usr/bin
+TMPPATH=	${STRICTTMPPATH}:${PATH}
+
+# XXX COMPILER_PATH is needed for finding cc1, ld and as
+# XXX GCC_EXEC_PREFIX is for *crt.o.  It is probably unnecessary now
+#	that LIBRARY_PATH is set.  We still can't use -nostdlib, since gcc
+#	wouldn't link *crt.o or libgcc if it were used.
+# XXX LD_LIBRARY_PATH is for ld.so.  It is also used by ld, although we don't
+#	want that - all compile-time library paths should be resolved by gcc.
+#	It fails for set[ug]id executables (are any used?).
+COMPILER_ENV=	BISON_SIMPLE=${TOOLROOT}/usr/share/misc/bison.simple \
+		COMPILER_PATH=${TOOLROOT}/usr/libexec:${TOOLROOT}/usr/bin \
+		GCC_EXEC_PREFIX=${WORLDTMP}${SHLIBDIR}:${WORLDTMP}/usr/lib/ \
+		LD_LIBRARY_PATH=${TOOLROOT}${SHLIBDIR} \
+		LIBRARY_PATH=${WORLDTMP}${SHLIBDIR}:${WORLDTMP}/usr/lib
+
+BMAKEENV=	PATH=${TMPPATH} ${COMPILER_ENV} NOEXTRADEPEND=t \
+		OBJFORMAT_PATH=${TOOLROOT}/usr/libexec:/usr/libexec
+XMAKEENV=	PATH=${STRICTTMPPATH} ${COMPILER_ENV} \
+		OBJFORMAT_PATH=${TOOLROOT}/usr/libexec \
+		CFLAGS="-nostdinc ${CFLAGS}"	# XXX -nostdlib
+
+# used to compile and install 'make' in temporary build tree
+MAKETMP=	${WORLDTMP}/make
+IBMAKE=	${BMAKEENV} MAKEOBJDIR=${MAKETMP} ${MAKE} DESTDIR=${WORLDTMP}
+
+.if	defined(NOTOOLS)
+# bootstrap make
+BMAKE=	${BMAKEENV} ${MAKE} DESTDIR=${WORLDTMP}
+# cross make used for compilation
+XMAKE=	${XMAKEENV} ${MAKE} DESTDIR=${WORLDTMP}
+# cross make used for final installation
+IXMAKE=	${XMAKEENV} ${MAKE}
+.else
+# bootstrap make
+BMAKE=	${BMAKEENV} ${WORLDTMP}/usr/bin/make DESTDIR=${WORLDTMP}
+# cross make used for compilation
+XMAKE=	${XMAKEENV} ${WORLDTMP}/usr/bin/make DESTDIR=${WORLDTMP}
+# cross make used for final installation
+IXMAKE=	${XMAKEENV} ${WORLDTMP}/usr/bin/make
+.endif
+
+#
+# buildworld
+#
+# Attempt to rebuild the entire system, with reasonable chance of
+# success, regardless of how old your existing system is.
+#
+buildworld:
+.if !defined(NOCLEAN)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Cleaning up the temporary ${OBJFORMAT} build tree"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}
+	chflags -R noschg ${WORLDTMP}/
+	rm -rf ${WORLDTMP}
+.endif
+.if !defined(NOTOOLS)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making make"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}/usr/bin ${MAKETMP}
+	( \
+	cd ${.CURDIR}/usr.bin/make; \
+		MAKEOBJDIRPREFIX=""; unset MAKEOBJDIRPREFIX; \
+		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} all; \
+		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} install; \
+		${IBMAKE} -I${.CURDIR}/share/mk ${MK_FLAGS} clean \
+	)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making mtree"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}/usr/sbin ${WORLDTMP}/mtree
+	( \
+	cd ${.CURDIR}/usr.sbin/mtree; \
+		MAKEOBJDIRPREFIX=""; unset MAKEOBJDIRPREFIX; \
+		export MAKEOBJDIR=${WORLDTMP}/mtree; \
+		${BMAKE} ${MK_FLAGS} all; \
+		${BMAKE} ${MK_FLAGS} -B install clean \
+	)
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making hierarchy"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 hierarchy
+.if !defined(NOCLEAN)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Cleaning up the ${OBJFORMAT} obj tree"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 ${CLEANDIR:S/^/par-/}
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding the ${OBJFORMAT} obj tree"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 par-${OBJDIR}
+.if !defined(NOTOOLS)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding ${OBJFORMAT} bootstrap tools"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 bootstrap
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding tools necessary to build the include files"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 include-tools
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding ${DESTDIR}/usr/include"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; SHARED=copies ${BMAKE} -f Makefile.inc1 includes
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding bootstrap libraries"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 bootstrap-libraries
+.if !defined(NOTOOLS)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding tools needed to build libraries"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 lib-tools
+.endif
+.if !defined(NOTOOLS)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding all other tools needed to build the ${OBJFORMAT} world"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${BMAKE} -f Makefile.inc1 build-tools
+.endif
+.if !defined(_NODEPEND)
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding dependencies"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${XMAKE} -f Makefile.inc1 par-depend
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building ${OBJFORMAT} libraries"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${XMAKE} -DNOINFO -DNOMAN -f Makefile.inc1 libraries
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building everything.."
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${XMAKE} -f Makefile.inc1 all
+
+everything:
+	@echo "--------------------------------------------------------------"
+	@echo " Building everything.."
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${XMAKE} -f Makefile.inc1 all
+
+#
+# installworld
+#
+# Installs everything compiled by a 'buildworld'.
+#
+installworld:
+	cd ${.CURDIR}; ${IXMAKE} -f Makefile.inc1 reinstall
+
+#
+# reinstall
+#
+# If you have a build server, you can NFS mount the source and obj directories
+# and do a 'make reinstall' on the *client* to install new binaries from the
+# most recent server build.
+#
+reinstall:
+	@echo "--------------------------------------------------------------"
+	@echo " Making hierarchy"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 hierarchy
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing everything.."
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 install
+.if ${MACHINE_ARCH} == "i386"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Re-scanning the shared libraries.."
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; /sbin/ldconfig -R
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding man page indexes"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/share/man; ${MAKE} makedb
+
+#
+# update
+#
+# Update the source tree, by running sup and/or running cvs to update to the
+# latest copy.
+#
+update:
+.if defined(SUP_UPDATE)
+	@echo "--------------------------------------------------------------"
+	@echo "Running ${SUP}"
+	@echo "--------------------------------------------------------------"
+	@${SUP} ${SUPFLAGS} ${SUPFILE}
+.if defined(SUPFILE1)
+	@${SUP} ${SUPFLAGS} ${SUPFILE1}
+.endif
+.if defined(SUPFILE2)
+	@${SUP} ${SUPFLAGS} ${SUPFILE2}
+.endif
+.endif
+.if defined(CVS_UPDATE)
+	@echo "--------------------------------------------------------------"
+	@echo "Updating /usr/src from cvs repository" ${CVSROOT}
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; cvs -q update -P -d
+.endif
+
+#
+# most
+#
+# Build most of the user binaries on the existing system libs and includes.
+#
+most:
+	@echo "--------------------------------------------------------------"
+	@echo " Building programs only"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/bin;		${MAKE} all
+	cd ${.CURDIR}/sbin;		${MAKE} all
+	cd ${.CURDIR}/libexec;		${MAKE} all
+	cd ${.CURDIR}/usr.bin;		${MAKE} all
+	cd ${.CURDIR}/usr.sbin;		${MAKE} all
+	cd ${.CURDIR}/gnu/libexec;	${MAKE} all
+	cd ${.CURDIR}/gnu/usr.bin;	${MAKE} all
+	cd ${.CURDIR}/gnu/usr.sbin;	${MAKE} all
+#.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT)
+#	cd ${.CURDIR}/kerberosIV;	${MAKE} most
+#.endif
+#.if !defined(NOSECURE) && !defined(NOCRYPT)
+#	cd ${.CURDIR}/secure;		${MAKE} most
+#.endif
+
+#
+# installmost
+#
+# Install the binaries built by the 'most' target.  This does not include
+# libraries or include files.
+#
+installmost:
+	@echo "--------------------------------------------------------------"
+	@echo " Installing programs only"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/bin;		${MAKE} install
+	cd ${.CURDIR}/sbin;		${MAKE} install
+	cd ${.CURDIR}/libexec;		${MAKE} install
+	cd ${.CURDIR}/usr.bin;		${MAKE} install
+	cd ${.CURDIR}/usr.sbin;		${MAKE} install
+	cd ${.CURDIR}/gnu/libexec;	${MAKE} install
+	cd ${.CURDIR}/gnu/usr.bin;	${MAKE} install
+	cd ${.CURDIR}/gnu/usr.sbin;	${MAKE} install
+#.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT)
+#	cd ${.CURDIR}/kerberosIV;	${MAKE} installmost
+#.endif
+#.if !defined(NOSECURE) && !defined(NOCRYPT)
+#	cd ${.CURDIR}/secure;		${MAKE} installmost
+#.endif
+
+#
+# ------------------------------------------------------------------------
+#
+# From here onwards are utility targets used by the 'make world' and
+# related targets.  If your 'world' breaks, you may like to try to fix
+# the problem and manually run the following targets to attempt to
+# complete the build.  Beware, this is *not* guaranteed to work, you
+# need to have a pretty good grip on the current state of the system
+# to attempt to manually finish it.  If in doubt, 'make world' again.
+#
+
+#
+# hierarchy - ensure that all the needed directories are present
+#
+hierarchy:
+	cd ${.CURDIR}/etc;		${MAKE} distrib-dirs
+
+#
+# bootstrap - [re]build tools needed to run the actual build, this includes
+# tools needed by 'make depend', as some tools are needed to generate source
+# for the dependency information to be gathered from.
+#
+bootstrap:
+.if defined(DESTDIR)
+	rm -f ${DESTDIR}/usr/src/sys
+	ln -s ${.CURDIR}/sys ${DESTDIR}/usr/src
+	cd ${.CURDIR}/include; find -dx . | cpio -dump ${DESTDIR}/usr/include
+.for d in net netinet posix4 sys vm machine
+	if [ -h ${DESTDIR}/usr/include/$d ]; then \
+		rm -f ${DESTDIR}/usr/include/$d ; \
+	fi
+.endfor
+	cd ${.CURDIR}/sys; \
+		find -dx net netinet posix4 sys vm -name '*.h' -o -type d | \
+		cpio -dump ${DESTDIR}/usr/include
+	mkdir -p ${DESTDIR}/usr/include/machine
+	cd ${.CURDIR}/sys/${MACHINE_ARCH}/include; find -dx . -name '*.h' -o -type d | \
+		cpio -dump ${DESTDIR}/usr/include/machine
+.endif
+	cd ${.CURDIR}/usr.bin/make; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+	cd ${.CURDIR}/usr.bin/xinstall; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+	cd ${.CURDIR}/usr.bin/yacc; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+	cd ${.CURDIR}/usr.bin/lex; ${MAKE} bootstrap; \
+		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} -DNOLIB all; \
+		${MAKE} ${MK_FLAGS} -DNOLIB -B install ${CLEANDIR}
+	cd ${.CURDIR}/usr.bin/lex; ${MAKE} ${OBJDIR}
+	cd ${.CURDIR}/usr.sbin/mtree; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+.if defined(DESTDIR)
+	cd ${.CURDIR}/include && ${MAKE} copies
+.endif
+
+#
+# include-tools - generally the same as 'bootstrap', except that it's for
+# things that are specifically needed to generate include files.
+#
+# XXX should be merged with bootstrap, it's not worth keeeping them separate.
+# Well, maybe it is now.  We force 'cleandepend' here to avoid dependencies
+# on cleaned away headers in ${WORLDTMP}.
+#
+include-tools:
+.for d in usr.bin/compile_et usr.bin/rpcgen
+	cd ${.CURDIR}/$d; ${MAKE} cleandepend; \
+		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+.endfor
+
+#
+# includes - possibly generate and install the include files.
+#
+includes:
+.if defined(CLOBBER)
+	rm -rf ${DESTDIR}/usr/include/*
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.include.dist \
+		-p ${DESTDIR}/usr/include
+.endif
+	cd ${.CURDIR}/include;			${MAKE} -B all install
+	cd ${.CURDIR}/gnu/include;		${MAKE} install
+	cd ${.CURDIR}/gnu/lib/libmp;		${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libobjc;		${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libreadline;	${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libregex;		${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libstdc++;	${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libg++;		${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libdialog;	${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/lib/libgmp;		${MAKE} beforeinstall
+.if exists(secure) && !defined(NOCRYPT)
+	cd ${.CURDIR}/secure/lib/libdes;	${MAKE} beforeinstall
+.endif
+.if exists(kerberosIV) && !defined(NOCRYPT) && defined(MAKE_KERBEROS4)
+	cd ${.CURDIR}/kerberosIV/lib/libacl;	${MAKE} beforeinstall
+	cd ${.CURDIR}/kerberosIV/lib/libkadm;	${MAKE} beforeinstall
+	cd ${.CURDIR}/kerberosIV/lib/libkafs;	${MAKE} beforeinstall
+	cd ${.CURDIR}/kerberosIV/lib/libkdb;	${MAKE} beforeinstall
+	cd ${.CURDIR}/kerberosIV/lib/libkrb;	${MAKE} beforeinstall
+	cd ${.CURDIR}/kerberosIV/lib/libtelnet; ${MAKE} beforeinstall
+.else
+	cd ${.CURDIR}/lib/libtelnet;		${MAKE} beforeinstall
+.endif
+.if exists(${.CURDIR}/lib/csu/${MACHINE})
+	cd ${.CURDIR}/lib/csu/${MACHINE};	${MAKE} beforeinstall
+.endif
+	cd ${.CURDIR}/lib/libalias;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libc;			${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libcalendar;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libcurses;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libdisk;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libedit;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libftpio;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libmd;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libmytinfo;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libncurses;		${MAKE} beforeinstall
+.if !defined(WANT_CSRG_LIBM)
+	cd ${.CURDIR}/lib/msun;			${MAKE} beforeinstall
+.endif
+	cd ${.CURDIR}/lib/libopie;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libpcap;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/librpcsvc;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libskey;		${MAKE} beforeinstall
+.if !defined(NOTCL) && exists (${.CURDIR}/contrib/tcl) && \
+	exists(${.CURDIR}/usr.bin/tclsh) && exists (${.CURDIR}/lib/libtcl)
+	cd ${.CURDIR}/lib/libtcl;		${MAKE} installhdrs
+.endif
+	cd ${.CURDIR}/lib/libtermcap;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libcom_err;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libss;		${MAKE} -B hdrs beforeinstall
+	cd ${.CURDIR}/lib/libscsi;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libutil;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libvgl;		${MAKE} beforeinstall
+	cd ${.CURDIR}/lib/libz;			${MAKE} beforeinstall
+	cd ${.CURDIR}/usr.bin/f2c;		${MAKE} beforeinstall
+	cd ${.CURDIR}/usr.bin/lex;		${MAKE} beforeinstall
+
+#
+# Declare tools if they are not required on all architectures.
+#
+.if ${MACHINE_ARCH} == "i386"
+# aout tools:
+_aout_ar	= usr.bin/ar
+_aout_as	= gnu/usr.bin/as
+_aout_ld	= gnu/usr.bin/ld
+_aout_nm	= usr.bin/nm
+_aout_ranlib	= usr.bin/ranlib
+_aout_size	= usr.bin/size
+_aout_strip	= usr.bin/strip
+.endif
+
+#
+# lib-tools - build tools to compile and install the libraries.
+#
+# XXX gperf is required for cc
+# XXX a new ld and tsort is required for cc
+lib-tools:
+.for d in				\
+		gnu/usr.bin/gperf	\
+		${_aout_ld}		\
+		usr.bin/tsort		\
+		${_aout_as}		\
+		gnu/usr.bin/bison	\
+		gnu/usr.bin/cc		\
+		${_aout_ar}		\
+		usr.bin/env		\
+		usr.bin/lex/lib		\
+		usr.bin/mk_cmds		\
+		${_aout_nm}		\
+		${_aout_ranlib}		\
+		${_aout_strip}		\
+		gnu/usr.bin/binutils	\
+		usr.bin/uudecode	\
+		share/info		\
+		usr.bin/objformat
+	cd ${.CURDIR}/$d; ${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install; \
+		${MAKE} ${MK_FLAGS:S/-DNOPIC//} -B ${CLEANDIR} ${OBJDIR}
+.endfor
+
+#
+# We have to know too much about ordering and subdirs in the lib trees:
+#
+# To satisfy shared library linkage when only the libraries being built
+# are visible:
+#
+# libcom_err must be built before libss.
+# libcrypt and libmd must be built before libskey.
+# libm must be built before libtcl.
+# libmytinfo must be built before libdialog and libncurses.
+# libncurses must be built before libdialog.
+# libtermcap must be built before libcurses, libedit and libreadline.
+#
+# Some libraries are built conditionally and/or are in inconsistently
+# named directories:
+#
+.if exists(lib/csu/${MACHINE}.pcc)
+_csu=lib/csu/${MACHINE}.pcc
+.elif ${MACHINE} == "i386" && ${OBJFORMAT} == "elf"
+_csu=lib/csu/i386-elf
+.else
+_csu=lib/csu/${MACHINE}
+.endif
+
+.if !defined(NOSECURE) && !defined(NOCRYPT)
+_libcrypt=	secure/lib/libcrypt lib/libcrypt
+.else
+_libcrypt=	lib/libcrypt
+.endif
+
+.if defined(WANT_CSRG_LIBM)
+_libm=	lib/libm
+.else
+_libm=	lib/msun
+.endif
+
+#
+# bootstrap-libraries - build just enough libraries for the bootstrap
+# tools, and install them under ${WORLDTMP}.
+#
+# Build csu and libgcc early so that some tools get linked to the new
+# versions (too late for the main tools, however).  Then build the
+# necessary prerequisite libraries (libtermcap just needs to be before
+# libcurses, and this only matters for the NOCLEAN case when NOPIC is
+# not set).
+#
+# This is mostly wrong.  The build tools must run on the host system,
+# so they should use host libraries.  We depend on the target being
+# similar enough to the host for new target libraries to work on the
+# host.
+#
+bootstrap-libraries:
+.for _lib in ${_csu} gnu/usr.bin/cc/libgcc lib/libtermcap \
+    gnu/lib/libregex gnu/lib/libreadline lib/libc \
+    ${_libcrypt} lib/libcurses lib/libedit ${_libm} \
+    lib/libmd lib/libutil lib/libz usr.bin/lex/lib
+.if exists(${.CURDIR}/${_lib})
+	cd ${.CURDIR}/${_lib}; \
+		${MAKE} ${MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${MK_FLAGS} all; \
+		${MAKE} ${MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+.endif
+.endfor
+
+#
+# bootstrap-rtld - Build the shared library loader and install it
+# under ${WORLDTMP}. This requires libc_pic which isn't normally
+# bootstrapped, so libc has to be built again. *sigh*
+#
+RTLD_MK_FLAGS=	-DNOINFO -DNOMAN -DNOPROFILE
+bootstrap-rtld:
+.if exists(${.CURDIR}/libexec/rtld-${OBJFORMAT})
+	cd ${.CURDIR}/lib/libc; \
+		${MAKE} ${RTLD_MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${RTLD_MK_FLAGS} all; \
+		${MAKE} ${RTLD_MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+	cd ${.CURDIR}/libexec/rtld-${OBJFORMAT}; \
+		${MAKE} obj; \
+		${MAKE} ${RTLD_MK_FLAGS} ${_DEPEND}; \
+		${MAKE} ${RTLD_MK_FLAGS} all; \
+		${MAKE} ${RTLD_MK_FLAGS} -B install ${CLEANDIR} ${OBJDIR}
+.endif
+
+#
+# libraries - build all libraries, and install them under ${DESTDIR}.
+#
+# The ordering is not as special as for bootstrap-libraries.  Build
+# the prerequisites first, then build almost everything else in
+# alphabetical order.
+#
+libraries:
+.for _lib in lib/libcom_err ${_libcrypt} ${_libm} lib/libmytinfo \
+    lib/libncurses lib/libtermcap \
+    gnu/lib gnu/usr.bin/cc/libgcc lib usr.bin/lex/lib usr.sbin/pcvt/keycap
+.if exists(${.CURDIR}/${_lib})
+	cd ${.CURDIR}/${_lib}; ${MAKE} all; ${MAKE} -B install
+.endif
+.endfor
+.if exists(${.CURDIR}/secure/lib) && !defined(NOCRYPT) && !defined(NOSECURE)
+	cd ${.CURDIR}/secure/lib; ${MAKE} all; ${MAKE} -B install
+.endif
+.if exists(${.CURDIR}/kerberosIV/lib) && !defined(NOCRYPT) && \
+    defined(MAKE_KERBEROS4)
+	cd ${.CURDIR}/kerberosIV/lib; ${MAKE} all; ${MAKE} -B install
+.endif
+
+#
+# Exclude unused tools from build-tools.
+#
+.if !defined(NOGAMES) && exists(${.CURDIR}/games)
+_adventure=	games/adventure
+_caesar=	games/caesar
+_hack=		games/hack
+_phantasia=	games/phantasia
+_strfile=	games/fortune/strfile
+.endif
+.if !defined(NOPERL)
+_perl=		gnu/usr.bin/perl/perl
+.endif
+.if !defined(NOSHARE) && exists(${.CURDIR}/share)
+_scrnmaps=	share/syscons/scrnmaps
+.endif
+.if !defined(NOLKM) && exists(${.CURDIR}/lkm) && ${OBJFORMAT} == "aout"
+_linux=		lkm/linux
+.endif
+.if ${OBJFORMAT} == "aout"
+_netboot=	sys/i386/boot/netboot
+.endif
+
+BTMAKEFLAGS=	${MK_FLAGS} -D_BUILD_TOOLS
+
+#
+# build-tools - build and install any other tools needed to complete the
+# compile and install.
+# ifdef stale
+# bc and cpp are required to build groff.  Otherwise, the order here is
+# mostly historical, i.e., bogus.
+# chmod is used to build gcc's tmpmultilib[2] at obscure times.
+# endif stale
+# XXX uname is a bug - the target should not depend on the host.
+#
+build-tools:
+.for d in				\
+		bin/cat 		\
+		bin/chmod		\
+		bin/cp 			\
+		bin/date		\
+		bin/dd			\
+		bin/echo		\
+		bin/expr		\
+		bin/hostname		\
+		bin/ln			\
+		bin/ls			\
+		bin/mkdir		\
+		bin/mv			\
+		bin/rm			\
+		bin/test		\
+		${_caesar}		\
+		${_strfile}		\
+		gnu/usr.bin/awk		\
+		gnu/usr.bin/bc		\
+		gnu/usr.bin/grep	\
+		gnu/usr.bin/groff	\
+		gnu/usr.bin/gzip	\
+		gnu/usr.bin/man/makewhatis	\
+		gnu/usr.bin/patch	\
+		${_perl}		\
+		gnu/usr.bin/sort	\
+		gnu/usr.bin/texinfo	\
+		usr.bin/basename	\
+		usr.bin/cap_mkdb	\
+		usr.bin/chflags		\
+		usr.bin/cmp		\
+		usr.bin/col		\
+		usr.bin/colldef		\
+		usr.bin/cpp		\
+		usr.bin/expand		\
+		usr.bin/file2c		\
+		usr.bin/find		\
+		usr.bin/gencat		\
+		usr.bin/id		\
+		usr.bin/join		\
+		usr.bin/lorder		\
+		usr.bin/m4		\
+		usr.bin/mkdep		\
+		usr.bin/mklocale	\
+		usr.bin/paste		\
+		usr.bin/sed		\
+		${_aout_size}		\
+		usr.bin/soelim		\
+		usr.bin/symorder	\
+		usr.bin/touch		\
+		usr.bin/tr		\
+		usr.bin/true		\
+		usr.bin/uname		\
+		usr.bin/uuencode	\
+		usr.bin/vgrind		\
+		usr.bin/vi		\
+		usr.bin/wc		\
+		usr.bin/xargs		\
+		usr.bin/yacc		\
+		usr.sbin/chown		\
+		usr.sbin/mtree		\
+		usr.sbin/zic		\
+		bin/sh
+	cd ${.CURDIR}/$d; ${MAKE} ${BTMAKEFLAGS} ${_DEPEND}; \
+		${MAKE} ${BTMAKEFLAGS} all; \
+		${MAKE} ${BTMAKEFLAGS} -B install ${CLEANDIR} ${OBJDIR}
+.endfor
+.if !defined(NOGAMES) && exists(${.CURDIR}/games)
+	cd ${DESTDIR}/usr/games; cp -p caesar strfile ${DESTDIR}/usr/bin
+.endif
+.for d in				\
+		bin/sh			\
+		${_adventure}		\
+		${_hack}		\
+		${_phantasia}		\
+		gnu/usr.bin/cc/cc_tools	\
+		lib/libmytinfo		\
+		${_linux}		\
+		${_scrnmaps}		\
+		${_netboot}
+	cd ${.CURDIR}/$d; ${MAKE} ${BTMAKEFLAGS} build-tools
+.endfor
+	cd ${.CURDIR}/usr.bin/tn3270/tools; ${MAKE} ${BTMAKEFLAGS} all
+
+#
+# Build aout versions of things that provide legacy support when all the
+# rest of the world is elf.
+#
+legacy-build:
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "aout"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Making hierarchy"
+	@echo "--------------------------------------------------------------"
+	mkdir -p ${WORLDTMP}
+	cd ${.CURDIR}; ${XMAKE} -f Makefile.inc1 hierarchy
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding the ${OBJFORMAT} obj tree"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; ${XMAKE} -f Makefile.inc1 par-${OBJDIR}
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebuilding ${DESTDIR}/usr/include"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; SHARED=copies ${XMAKE} -f Makefile.inc1 includes
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building legacy libraries"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}; \
+		${XMAKE} -DNOINFO -DNOMAN -f Makefile.inc1 bootstrap-libraries
+	cd ${.CURDIR}; \
+		${XMAKE} -DNOINFO -DNOMAN -f Makefile.inc1 libraries
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building legacy rtld"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/libexec/rtld-aout; \
+		${XMAKE} -DNOMAN depend; ${XMAKE} -DNOMAN all;
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building legacy lkms"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/lkm; \
+		${XMAKE} -DNOMAN depend; ${XMAKE} -DNOMAN all;
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building legacy boot"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/sys/i386/boot; \
+		${XMAKE} -DNOMAN depend; ${XMAKE} -DNOMAN all;
+.endif
+
+#
+# Install aout versions of things that provide legacy support when all the
+# rest of the world is elf.
+#
+legacy-install:
+.if	${MACHINE_ARCH} == "i386" && ${OBJFORMAT} == "aout"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing legacy libraries"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/lib; ${MAKE} -B install
+	cd ${.CURDIR}/gnu/lib; ${MAKE} -B install
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing legacy rtld"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/libexec/rtld-aout; ${MAKE} -DNOMAN install
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing legacy lkms"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/lkm; ${MAKE} -DNOMAN install
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing legacy boot"
+	@echo "--------------------------------------------------------------"
+	cd ${.CURDIR}/sys/i386/boot; ${MAKE} -DNOMAN install
+.endif
+
+
+.for __target in clean cleandepend cleandir depend obj
+.for entry in ${SUBDIR}
+${entry}.${__target}__D: .PHONY
+	@if test -d ${.CURDIR}/${entry}.${MACHINE}; then \
+		${ECHODIR} "===> ${DIRPRFX}${entry}.${MACHINE}"; \
+		edir=${entry}.${MACHINE}; \
+		cd ${.CURDIR}/$${edir}; \
+	else \
+		${ECHODIR} "===> ${DIRPRFX}${entry}"; \
+		edir=${entry}; \
+		cd ${.CURDIR}/$${edir}; \
+	fi; \
+	${MAKE} ${__target} DIRPRFX=${DIRPRFX}$${edir}/
+.endfor
+par-${__target}: ${SUBDIR:S/$/.${__target}__D/}
+.endfor
+
+.include <bsd.subdir.mk>
diff --git a/Makefile.upgrade b/Makefile.upgrade
new file mode 100644
index 0000000..7a61413
--- /dev/null
+++ b/Makefile.upgrade
@@ -0,0 +1,230 @@
+#
+#	$Id$
+#
+# This makefile contains rules for preforming upgrades that are outside
+# the scope of the normal build world process.
+#
+
+#
+# Build things relative to the user's preferred object directory,
+# defaulting to /usr/obj if not defined.
+#
+MAKEOBJDIRPREFIX?=/usr/obj
+
+#
+# The installed operating system release gives us the hint as to whether
+# we need to build a kernel too.
+#
+INSTALLEDVERSION!=uname -r
+
+#
+# Upgrade the installed make to the current version using the installed
+# headers, libraries and build tools. This is required on installed versions
+# prior to 2.2.5 in which the installed make doesn't support the -m argument.
+#
+make	:
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Upgrading the installed make"
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}/usr.bin/make; \
+		make obj && make depend && make all && make install
+
+#
+# Upgrade from aout to elf, doing an aout build first to ensure that there
+# are up-to-date tools before building the initial elf world. The aout
+# tools just built into the object directory tree and executed from there
+# during the elf build. Then install the aout tools, build an aout kernel
+# with them (in case the installed kernel is an older version), then 
+# install the elf world.
+#
+aout-to-elf aout-to-elf-install :				\
+		${MAKEOBJDIRPREFIX}/do_aout_buildworld		\
+		${MAKEOBJDIRPREFIX}/do_elf_buildworld		\
+		${MAKEOBJDIRPREFIX}/do_aout_installworld	\
+		${MAKEOBJDIRPREFIX}/do_aout_kernel		\
+		${MAKEOBJDIRPREFIX}/do_elf_installworld		\
+		${MAKEOBJDIRPREFIX}/do_set_objformat		\
+		${MAKEOBJDIRPREFIX}/do_install_kernel_reboot
+
+#
+# Just do the build parts of the transition build.
+#
+aout-to-elf-build :						\
+		${MAKEOBJDIRPREFIX}/do_aout_buildworld		\
+		${MAKEOBJDIRPREFIX}/do_elf_buildworld		
+
+#
+# The installed system may not have tools capable of building an elf
+# aware world, so a complete aout buildworld is required to get a known
+# set of tools.
+#
+${MAKEOBJDIRPREFIX}/do_aout_buildworld :
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Doing an aout buildworld to get an up-to-date set of tools"
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/aout \
+		OBJFORMAT=aout \
+		make -f Makefile.inc1 -m ${.CURDIR}/share/mk buildworld
+	@touch ${MAKEOBJDIRPREFIX}/do_aout_buildworld
+
+#
+# Temporary path for initial elf build.
+#
+AOUTTMPPATH=	${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp/sbin:${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp/bin:${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp/usr/sbin:${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp/usr/bin:${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp/usr/games
+
+#
+# Use the aout tools from the aout buildworld to do an elf buildworld.
+#
+${MAKEOBJDIRPREFIX}/do_elf_buildworld :
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Doing an elf buildworld using the aout tools in the aout"
+	@echo " obj tree."
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/elf \
+		PATH=${AOUTTMPPATH} OBJFORMAT=elf NOTOOLS=1 \
+		TOOLROOT=${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp \
+		make -f Makefile.inc1 -m ${.CURDIR}/share/mk buildworld
+	@touch ${MAKEOBJDIRPREFIX}/do_elf_buildworld
+
+#
+# Before installing the aout world, allow for the possibility that the
+# world about to be installed has some different syscalls to the installed
+# kernel which will make shutting the system down problematic. We set aside
+# copies of certain programs which match the running kernel.
+#
+# Install the aout world so that anything that isn't replaced by the
+# elf world will be updated.
+#
+${MAKEOBJDIRPREFIX}/do_aout_installworld :
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " You are about to update the installed system (or the system"
+	@echo " that your DESTDIR points to). You can type Ctrl-C to abort"
+	@echo " now or press return to start the first phase of the update."
+	@echo "--------------------------------------------------------------"
+	@/bin/sh -c "read -p \"Return to continue or Ctrl-C to abort: \" _e"
+.if	${INSTALLEDVERSION} != "3.0-CURRENT"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Saving a copy of programs required to shut the system down"
+	@echo "--------------------------------------------------------------"
+	@cp /bin/sh ${MAKEOBJDIRPREFIX}
+	@cp /sbin/reboot ${MAKEOBJDIRPREFIX}
+.endif
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Doing an aout installworld using the aout tools in the aout"
+	@echo " obj tree."
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/aout \
+		PATH=${AOUTTMPPATH} OBJFORMAT=aout NOTOOLS=1 \
+		TOOLROOT=${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp \
+		make -f Makefile.inc1 -m ${.CURDIR}/share/mk installworld
+	@touch ${MAKEOBJDIRPREFIX}/do_aout_installworld
+
+#
+# The installed kernel may not match the world that is installed, so build
+# a generic kernel, but don't install it. The user can decide if the kernel
+# needs to be installed. Perhaps we should install it in the root
+# directory as an obscure name just in case a reboot is required?
+#
+${MAKEOBJDIRPREFIX}/do_aout_kernel :
+.if	${INSTALLEDVERSION} == "3.0-CURRENT"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " You are already running 3.0-CURRENT, so a kernel build"
+	@echo " is probably not required."
+	@echo "--------------------------------------------------------------"
+.else
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Building a generic kernel using the new aout tools"
+	@echo "--------------------------------------------------------------"
+.if	exists(${.CURDIR}/sys/compile/GENERICupgrade)
+	@rm -rf ${.CURDIR}/sys/compile/GENERICupgrade
+.endif
+	@cd ${.CURDIR}/sys/i386/conf; config GENERICupgrade
+	@-cd ${.CURDIR}/sys/compile/GENERICupgrade; make depend && make all
+	@cd ${.CURDIR}/sys/compile/GENERICupgrade; make depend && make all
+.endif
+	@touch ${MAKEOBJDIRPREFIX}/do_aout_kernel
+
+#
+# Install the elf world overwriting just about all the previously installed
+# aout world. Any aout things that need to be kept have already been
+# installed in different places (typically in aout subdirectories).
+#
+${MAKEOBJDIRPREFIX}/do_elf_installworld :
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " You are about to update the installed system (or the system"
+	@echo " that your DESTDIR points to) with the elf versions of"
+	@echo " everything, replacing the aout versions. You can type Ctrl-C"
+	@echo " to abort now, leaving just the aout world installed, or"
+	@echo " press return to start the second phase of the update."
+	@echo "--------------------------------------------------------------"
+	@/bin/sh -c "read -p \"Return to continue or Ctrl-C to abort: \" _e"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Doing an elf installworld using the aout tools in the aout"
+	@echo " obj tree."
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}; MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX}/elf \
+		PATH=${AOUTTMPPATH} OBJFORMAT=elf NOTOOLS=1 \
+		TOOLROOT=${MAKEOBJDIRPREFIX}/aout${.CURDIR}/tmp \
+		make -f Makefile.inc1 -m ${.CURDIR}/share/mk installworld
+	@touch ${MAKEOBJDIRPREFIX}/do_elf_installworld
+
+#
+# Now that the elf world has been installed, we can set the default
+# object format to elf.
+#
+${MAKEOBJDIRPREFIX}/do_set_objformat	:
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Setting the default object format to elf"
+	@echo "--------------------------------------------------------------"
+	@echo "OBJFORMAT=elf" > /etc/objformat
+	@touch ${MAKEOBJDIRPREFIX}/do_set_objformat
+
+#
+# If not already running a current kernel, install the GENERICupgrade kernel
+# and reboot.
+#
+${MAKEOBJDIRPREFIX}/do_install_kernel_reboot	:
+.if	${INSTALLEDVERSION} == "3.0-CURRENT"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Your system has been updated to run elf by default!"
+	@echo
+	@echo " You should reboot your system now."
+	@echo "--------------------------------------------------------------"
+	@touch ${MAKEOBJDIRPREFIX}/do_install_kernel_reboot
+.else
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Your system has been updated to run elf by default!"
+	@echo
+	@echo " Since you are running ${INSTALLEDVERSION}, the kernel must"
+	@echo " be installed before the system is rebooted. You can type"
+	@echo " Ctrl-C to abort the kernel installation (at your own risk),"
+	@echo " or press return for the kernel to be installed and the"
+	@echo " system rebooted."
+	@echo "--------------------------------------------------------------"
+	@${MAKEOBJDIRPREFIX}/sh -c "read -p \"Return to continue or Ctrl-C to abort: \" _e"
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Installing a new GENERICupgrade kernel"
+	@echo "--------------------------------------------------------------"
+	@cd ${.CURDIR}/sys/compile/GENERICupgrade; make install
+	@echo
+	@echo "--------------------------------------------------------------"
+	@echo " Rebooting......."
+	@echo "--------------------------------------------------------------"
+	@touch ${MAKEOBJDIRPREFIX}/do_install_kernel_reboot
+	@-${MAKEOBJDIRPREFIX}/reboot
+.endif
+