1# 2# $Id$ 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# update - Convenient way to update your source tree (cvs). 11# most - Build user commands, no libraries or include files. 12# installmost - Install user commands, no libraries or include files. 13# aout-to-elf - Upgrade an system from a.out to elf format (see below). 14# aout-to-elf-build - Build everything required to upgrade a system from 15# a.out to elf format (see below). 16# aout-to-elf-install - Install everything built by aout-to-elf-build (see 17# below). 18# 19# This makefile is simple by design. The FreeBSD make automatically reads 20# the /usr/share/mk/sys.mk unless the -m argument is specified on the 21# command line. By keeping this makefile simple, it doesn't matter too 22# much how different the installed mk files are from those in the source 23# tree. This makefile executes a child make process, forcing it to use 24# the mk files from the source tree which are supposed to DTRT. 25# 26# The user-driven targets (as listed above) are implemented in Makefile.inc0 27# and the private targets are in Makefile.inc1. These are kept separate 28# to help the bootstrap build from aout to elf format. 29# 30# For novices wanting to build from current sources, the simple instructions 31# are: 32# 33# 1. Ensure that your /usr/obj directory has at least 165 Mb of free space. 34# 2. `cd /usr/src' (or to the directory containing your source tree). 35# 3. `make world' 36# 37# Be warned, this will update your installed system, except for configuration 38# files in the /etc directory. You have to do those manually. 39# 40# If at first you're a little nervous about having a `make world' update 41# your system, a `make buildworld' will build everything in the /usr/obj 42# tree without touching your installed system. To be of any further use 43# though, a `make installworld' is required. 44# 45# The `make world' process always follows the installed object format. 46# This is set by creating /etc/objformat containing either OBJFORMAT=aout 47# or OBJFORMAT=elf. If this file does not exist, the object format defaults 48# to aout. This is expected to be changed to elf just prior to the release 49# or 3.0. If OBJFORMAT is set as an environment variable or in /etc/make.conf, 50# this overrides /etc/objformat. 51# 52# Unless -DNOAOUT is specified, a `make world' with OBJFORMAT=elf will 53# update the legacy support for aout. This includes all libraries, ld.so, 54# lkms and boot objects. This part of build should be regarded as 55# deprecated and you should _not_ expect to be able to do this past the 56# release of 3.1. You have exactly one major release to move entirely 57# to elf. 58# 59# ---------------------------------------------------------------------------- 60# 61# Upgrading an i386 system from a.out to elf format 62# 63# 64# The aout->elf transition build is performed by doing a `make aout-to-elf' 65# or a `make aout-to-elf-build' followed by a `make aout-to-elf-install'. 66# You need to have at least 320 Mb of free space for the object tree. 67# 68# The upgrade process checks the installed release. If this is 3.0-CURRENT, 69# it is assumed that your kernel contains all the syscalls required by the 70# current sources. 71# 72# For installed systems where `uname -r' reports something other than 73# 3.0-CURRENT, the upgrade process expects to build a kernel using the 74# kernel configuration file sys/i386/conf/GENERICupgrade. This file is 75# defaulted to the GENERIC kernel configuration file on the assumption that 76# it will be suitable for most systems. Before performing the upgrade, 77# replace sys/i386/conf/GENERICupgrade with your own version if your 78# hardware requires a different configuration. 79# 80# The upgrade procedure will stop and ask for confirmation to proceed 81# several times. On each occasion, you can type Ctrl-C to abort the 82# upgrade. 83# 84# At the end of the upgrade procedure, /etc/objformat is created or 85# updated to contain OBJFORMAT=elf. From then on, you're elf by default. 86# 87# ---------------------------------------------------------------------------- 88# 89# 90# Define the user-driven targets. These are listed here in alphabetical 91# order, but that's not important. 92# 93TGTS = all buildworld depend everything includes installmost install \ 94 installworld most obj update world 95 96# 97# Handle the user-driven targets, using the source relative mk files. 98# 99${TGTS} : upgrade_checks 100 @cd ${.CURDIR}; \ 101 make -f Makefile.inc0 -m ${.CURDIR}/share/mk ${.TARGET} 102 103# 104# Perform a few tests to determine if the installed tools are adequate 105# for building the world. These are for older systems (prior to 2.2.5). 106# 107# From 2.2.5 onwards, the installed tools will pass these upgrade tests, 108# so the normal make world is capable of doing what is required to update 109# the system to current. 110# 111upgrade_checks : 112 @cd ${.CURDIR}; if `make -m ${.CURDIR}/share/mk test > /dev/null 2>&1`; then ok=1; else make -f Makefile.upgrade make; fi; 113 114# 115# A simple test target used as part of the test to see if make supports 116# the -m argument. 117# 118test : 119 120# 121# Define the upgrade targets. These are listed here in alphabetical 122# order, but that's not important. 123# 124UPGRADE = aout-to-elf aout-to-elf-build aout-to-elf-install 125 126# 127# Handle the upgrade targets, using the source relative mk files. 128# 129${UPGRADE} : upgrade_checks 130 @cd ${.CURDIR}; \ 131 make -f Makefile.upgrade -m ${.CURDIR}/share/mk ${.TARGET} 132