Makefile revision 64049 
1#
2# $FreeBSD: head/Makefile 64049 2000-07-31 09:26:59Z alex $
3#
4# The user-driven targets are:
5#
6# buildworld          - Rebuild *everything*, including glue to help do
7#                       upgrades.
8# installworld        - Install everything built by "buildworld".
9# world               - buildworld + installworld.
10# buildkernel         - Rebuild the kernel and the kernel-modules.
11# installkernel       - Install the kernel and the kernel-modules.
12# update              - Convenient way to update your source tree (cvs).
13# upgrade             - Upgrade a.out (2.2.x/3.0) system to the new ELF way
14# most                - Build user commands, no libraries or include files.
15# installmost         - Install user commands, no libraries or include files.
16# aout-to-elf         - Upgrade an system from a.out to elf format (see below).
17# aout-to-elf-build   - Build everything required to upgrade a system from
18#                       a.out to elf format (see below).
19# aout-to-elf-install - Install everything built by aout-to-elf-build (see
20#                       below).
21# move-aout-libs      - Move the a.out libraries into an aout sub-directory
22#                       of each elf library sub-directory.
23#
24# This makefile is simple by design. The FreeBSD make automatically reads
25# the /usr/share/mk/sys.mk unless the -m argument is specified on the 
26# command line. By keeping this makefile simple, it doesn't matter too
27# much how different the installed mk files are from those in the source
28# tree. This makefile executes a child make process, forcing it to use
29# the mk files from the source tree which are supposed to DTRT.
30#
31# The user-driven targets (as listed above) are implemented in Makefile.inc0
32# and the private targets are in Makefile.inc1. These are kept separate
33# to help the bootstrap build from aout to elf format.
34#
35# For novices wanting to build from current sources, the simple instructions
36# are:
37#
38# 1.  Ensure that your /usr/obj directory has at least 260 Mb of free space.
39# 2.  `cd /usr/src'  (or to the directory containing your source tree).
40# 3.  `make world'
41#
42# Be warned, this will update your installed system, except for configuration
43# files in the /etc directory and for the kernel. You have to do those manually.
44#
45# If at first you're a little nervous about having a `make world' update
46# your system, a `make buildworld' will build everything in the /usr/obj
47# tree without touching your installed system. To be of any further use
48# though, a `make installworld' is required.
49#
50# If -DWANT_AOUT is specified, a `make world' with OBJFORMAT=elf will
51# update the legacy support for aout. This includes all libraries, ld.so
52# and boot objects. This part of build should be regarded as
53# deprecated and you should _not_ expect to be able to do this past the
54# release of 4.0. You have exactly one major release to move entirely
55# to elf.
56#
57# ----------------------------------------------------------------------------
58#
59#           Upgrading an i386 system from a.out to elf format
60#
61#
62# The aout->elf transition build is performed by doing a `make upgrade' (or
63# `make aout-to-elf') or in two steps by a `make aout-to-elf-build' followed
64# by a `make aout-to-elf-install', depending on user preference.
65# You need to have at least 320 Mb of free space for the object tree.
66#
67# The upgrade process checks the installed release. If this is 3.0-CURRENT,
68# it is assumed that your kernel contains all the syscalls required by the
69# current sources.
70#
71# The upgrade procedure will stop and ask for confirmation to proceed
72# several times. On each occasion, you can type Ctrl-C to abort the
73# upgrade.  Optionally, you can also start it with NOCONFIRM=yes and skip
74# the confirmation steps.
75#
76# At the end of the upgrade procedure, /etc/objformat is created or
77# updated to contain OBJFORMAT=elf. From then on, you're elf by default.
78#
79# ----------------------------------------------------------------------------
80#
81#
82# Define the user-driven targets. These are listed here in alphabetical
83# order, but that's not important.
84#
85TGTS=	afterdistribute all buildkernel buildworld checkdpadd clean \
86	cleandepend cleandir depend distribute everything hierarchy includes \
87	install installkernel installmost installworld libraries lint \
88	maninstall mk most obj objlink regress rerelease tags update
89
90PATH=	/sbin:/bin:/usr/sbin:/usr/bin
91MAKE=	PATH=${PATH} make -m ${.CURDIR}/share/mk -f Makefile.inc1
92
93#
94# Handle the user-driven targets, using the source relative mk files.
95#
96${TGTS}: upgrade_checks
97	@cd ${.CURDIR}; \
98		${MAKE} ${.TARGET}
99
100# Set a reasonable default
101.MAIN:	all
102
103STARTTIME!= LC_TIME=C date
104#
105# world
106#
107# Attempt to rebuild and reinstall *everything*, with reasonable chance of
108# success, regardless of how old your existing system is.
109#
110world: upgrade_checks
111	@echo "--------------------------------------------------------------"
112	@echo ">>> ${OBJFORMAT} make world started on ${STARTTIME}"
113	@echo "--------------------------------------------------------------"
114.if target(pre-world)
115	@echo
116	@echo "--------------------------------------------------------------"
117	@echo ">>> Making 'pre-world' target"
118	@echo "--------------------------------------------------------------"
119	@cd ${.CURDIR}; ${MAKE} pre-world
120.endif
121	@cd ${.CURDIR}; ${MAKE} buildworld
122	@cd ${.CURDIR}; ${MAKE} -B installworld
123.if target(post-world)
124	@echo
125	@echo "--------------------------------------------------------------"
126	@echo ">>> Making 'post-world' target"
127	@echo "--------------------------------------------------------------"
128	@cd ${.CURDIR}; ${MAKE} post-world
129.endif
130	@echo
131	@echo "--------------------------------------------------------------"
132	@echo ">>> ${OBJFORMAT} make world started on ${STARTTIME}"
133	@echo ">>> ${OBJFORMAT} make world completed on `LC_TIME=C date`"
134	@echo "--------------------------------------------------------------"
135
136#
137# Perform a few tests to determine if the installed tools are adequate
138# for building the world. These are for older systems (prior to 2.2.5).
139#
140# From 2.2.5 onwards, the installed tools will pass these upgrade tests,
141# so the normal make world is capable of doing what is required to update
142# the system to current.
143#
144upgrade_checks:
145	@cd ${.CURDIR}; \
146		if ! make -m ${.CURDIR}/share/mk test > /dev/null 2>&1; then \
147			make make; \
148		fi
149
150#
151# A simple test target used as part of the test to see if make supports
152# the -m argument.
153#
154test:
155
156#
157# Upgrade the installed make to the current version using the installed
158# headers, libraries and build tools. This is required on installed versions
159# prior to 2.2.5 in which the installed make doesn't support the -m argument.
160#
161make:
162	@echo
163	@echo "--------------------------------------------------------------"
164	@echo " Upgrading the installed make"
165	@echo "--------------------------------------------------------------"
166	@cd ${.CURDIR}/usr.bin/make; \
167		make obj && make depend && make all && make install
168
169#
170# Define the upgrade targets. These are listed here in alphabetical
171# order, but that's not important.
172#
173UPGRADE=	aout-to-elf aout-to-elf-build aout-to-elf-install \
174		move-aout-libs
175
176#
177# Handle the upgrade targets, using the source relative mk files.
178#
179
180upgrade:	aout-to-elf
181
182${UPGRADE} : upgrade_checks
183	@cd ${.CURDIR}; \
184		${MAKE} -f Makefile.upgrade -m ${.CURDIR}/share/mk ${.TARGET}
185