#	$NetBSD: Makefile,v 1.138 2001/10/19 03:19:01 tv Exp $

# This is the top-level makefile for building NetBSD. For an outline of
# how to build a snapshot or release, as well as other release engineering
# information, see http://www.netbsd.org/developers/releng/index.html
#
# Not everything you can set or do is documented in this makefile. In
# particular, you should review the files in /usr/share/mk (especially
# bsd.README) for general information on building programs and writing
# Makefiles within this structure, and see the comments in src/etc/Makefile
# for further information on installation and release set options.
#
# Variables listed below can be set on the make command line (highest
# priority), in /etc/mk.conf (middle priority), or in the environment
# (lowest priority).
#
# Variables:
#   DESTDIR is the target directory for installation of the compiled
#	software. It defaults to /. Note that programs are built against
#	libraries installed in DESTDIR.
#   MKMAN, if set to `no', will prevent building of manual pages.
#   MKOBJDIRS, if not set to `no', will build object directories at 
#	an appropriate point in a build.
#   MKSHARE, if set to `no', will prevent building and installing
#	anything in /usr/share.
#   NBUILDJOBS is the number of jobs to start in parallel during a
#	`make build'. It defaults to 1.
#   UPDATE, if defined, will avoid a `make cleandir' at the start of
#     `make build', as well as having the effects listed in
#     /usr/share/mk/bsd.README.
#   NOCLEANDIR, if defined, will avoid a `make cleandir' at the start
#     of the `make build'.
#   NOINCLUDES will avoid the `make includes' usually done by `make build'.
#
# Targets:
#   build:
#	Builds a full release of NetBSD in DESTDIR.  If BUILD_DONE is
#	set, this is an empty target.
#   release:
#	Does a `make build,' and then tars up the DESTDIR files
#	into RELEASEDIR, in release(7) format. (See etc/Makefile for
#	more information on this.)
#   regression-tests:
#	Runs the regression tests in "regress" on this host.
#
# Targets invoked by `make build,' in order:
#   obj:             creates object directories.
#   cleandir:        cleans the tree.
#   do-make-tools:   builds host toolchain.
#   do-distrib-dirs: creates the distribution directories.
#   includes:        installs include files.
#   do-build:        builds and installs the entire system.

.include "${.CURDIR}/share/mk/bsd.own.mk"

# Sanity check: make sure that "make build" is not invoked simultaneously
# with a standard recursive target.

.if make(build) || make(release) || make(snapshot)
.for targ in ${TARGETS:Nobj:Ncleandir}
.if make(${targ}) && !target(.BEGIN)
.BEGIN:
	@echo 'BUILD ABORTED: "make build" and "make ${targ}" are mutually exclusive.'
	@false
.endif
.endfor
.endif

.if defined(NBUILDJOBS)
_J=		-j${NBUILDJOBS}
.endif

.if ${USETOOLS} == "yes"
_SUBDIR+=	tools
.endif
_SUBDIR+=	lib include gnu bin games libexec sbin usr.bin \
		usr.sbin share sys etc distrib regress

# Weed out directories that don't exist.

.for dir in ${_SUBDIR}
.if exists(${dir}/Makefile)
SUBDIR+=	${dir}
.endif
.endfor

.if exists(regress)
regression-tests:
	@echo Running regression tests...
	@cd ${.CURDIR}/regress && ${MAKE} ${_M} regress
.endif

.if ${MKMAN} != "no"
afterinstall: whatis.db
whatis.db:
	cd ${.CURDIR}/share/man && ${MAKE} ${_M} makedb
.endif

# Targets (in order!) called by "make build".

.if ${MKOBJDIRS:Uno} != "no"
BUILDTARGETS+=	obj
.endif
.if !defined(UPDATE) && !defined(NOCLEANDIR)
BUILDTARGETS+=	cleandir
.endif
.if ${USETOOLS} == "yes"
BUILDTARGETS+=	do-make-tools
.endif
.if !defined(NODISTRIBDIRS)
BUILDTARGETS+=	do-distrib-dirs
.endif
.if !defined(NOINCLUDES)
BUILDTARGETS+=	includes
.endif
BUILDTARGETS+=	do-build

# Enforce proper ordering of some rules.

.ORDER:		${BUILDTARGETS}
includes-lib:	includes-include includes-sys
includes-gnu:	includes-lib

# Build the system and install into DESTDIR.

build:
.if defined(BUILD_DONE)
	@echo "Build already installed into ${DESTDIR}"
.else
	@echo -n "Build started at: " && date
	@${MAKE} ${_J} ${_M} ${BUILDTARGETS}
	@echo -n "Build finished at: " && date
.endif

# Build a release or snapshot (implies "make build").

release snapshot: build
	cd ${.CURDIR}/etc && ${MAKE} ${_M} INSTALL_DONE=1 release

# Special components of the "make build" process.

do-make-tools:
	cd ${.CURDIR}/tools && ${MAKE} ${_M} build

do-distrib-dirs:
	cd ${.CURDIR}/etc && ${MAKE} ${_M} DESTDIR=${DESTDIR} distrib-dirs

do-build:
.for dir in lib/csu lib gnu/lib
.for targ in dependall install
	cd ${.CURDIR}/${dir} && \
		${MAKE} ${_M} ${_J} MKSHARE=no MKLINT=no ${targ}
.endfor
.endfor
	${MAKE} ${_M} ${_J} dependall
	${MAKE} ${_M} ${_J} install

# Speedup stubs for some subtrees that don't need to run these rules.
# (Tells <bsd.subdir.mk> not to recurse for them.)

includes-bin includes-games includes-libexec includes-regress \
includes-sbin includes-usr.sbin includes-tools \
all-tools install-tools install-regress:
	@true

.include "${.CURDIR}/share/mk/bsd.subdir.mk"

_M:=	-m ${.CURDIR}/share/mk