1 Updating Information for FreeBSD current users
3 This file is maintained and copyrighted by M. Warner Losh
4 <imp@village.org>. See end of file for further details. For commonly
5 done items, please see the COMMON ITEMS: section later in the file.
7 Items affecting the ports and packages system can be found in
8 /usr/ports/UPDATING. Please read that file before running
11 NOTE TO PEOPLE WHO THINK THAT FreeBSD 7.x IS SLOW:
12 FreeBSD 7.x has many debugging features turned on, in
13 both the kernel and userland. These features attempt to detect
14 incorrect use of system primitives, and encourage loud failure
15 through extra sanity checking and fail stop semantics. They
16 also substantially impact system performance. If you want to
17 do performance measurement, benchmarking, and optimization,
18 you'll want to turn them off. This includes various WITNESS-
19 related kernel options, INVARIANTS, malloc debugging flags
20 in userland, and various verbose features in the kernel. Many
21 developers choose to disable these features on build machines
22 to maximize performance.
25 The IPv6 multicast forwarding code may now be loaded into GENERIC
26 kernels by loading the ip_mroute.ko module.
27 The module build heeds the MK_INET6_SUPPORT make.conf option; it
28 may be set to "no" to omit building the IPv6 support.
31 The following build error may appear when upgrading from an old
32 -current (usr.sbin/bsnmpd/modules/snmp_bridge, depend stage):
33 line 31: '(' expected at begin of node
34 context: " TruthValue ENUM (
36 If so, run "make install" in usr.sbin/bsnmpd/gensnmptree. (It
37 should probably be a build tool). In the same module, you may
39 ...snmp_bridge/bridge_sys.c:39:27:
40 net/bridgestp.h: No such file or directory
41 If so, run "cp src/sys/net/bridgestp.h /usr/include/net".
44 The output of netstat -r has changed. Without -n, we now only
45 print a "network name" without the prefix length if the network
46 address and mask exactly match a Class A/B/C network, and an entry
47 exists in the nsswitch "networks" map.
48 With -n, we print the full unabbreviated CIDR network prefix in
49 the form "a.b.c.d/p". 0.0.0.0/0 is always printed as "default".
50 This change is in preparation for changes such as equal-cost
51 multipath, and to more generally assist operational deployment
52 of FreeBSD as a modern IPv4 router.
55 PIM has been turned on by default in the IPv4 multicast
56 routing code. The kernel option 'PIM' has now been removed.
57 PIM is now built by default if option 'MROUTING' is specified.
58 It may now be loaded into GENERIC kernels by loading the
62 Support for IPIP tunnels (VIFF_TUNNEL) in IPv4 multicast routing
63 has been removed. Its functionality may be achieved by explicitly
64 configuring gif(4) interfaces and using the 'phyint' keyword in
66 XORP does not support source-routed IPv4 multicast tunnels nor the
67 integrated IPIP tunneling, therefore it is not affected by this
68 change. The __FreeBSD_version macro has been bumped to 700030.
71 Support for PCI Message Signalled Interrupts has been
72 re-enabled in the bge driver, only for those chips which are
73 believed to support it properly. If there are any problems,
74 MSI can be disabled completely by setting the
75 'hw.pci.enable_msi' and 'hw.pci.enable_msix' tunables to 0
79 Support for PCI Message Signalled Interrupts has been
80 disabled again in the bge driver. Many revisions of the
81 hardware fail to support it properly. Support can be
82 re-enabled by removing the #define of BGE_DISABLE_MSI in
83 "src/sys/dev/bge/if_bge.c".
86 Support for PCI Message Signalled Interrupts has been added
87 to the bge driver. If there are any problems, MSI can be
88 disabled completely by setting the 'hw.pci.enable_msi' and
89 'hw.pci.enable_msix' tunables to 0 in the loader.
92 The removal of several facets of the experimental Threading
93 system from the kernel means that the proc and thread structures
94 have changed quite a bit. I suggest all kernel modules that might
95 reference these structures be recompiled.. Especially the
99 Sound infrastructure has been updated with various fixes and
100 improvements. Most of the changes are pretty much transparent,
101 with exceptions of followings:
102 1) All sound driver specific sysctls (hw.snd.pcm%d.*) have been
103 moved to their own dev sysctl nodes, for example:
104 hw.snd.pcm0.vchans -> dev.pcm.0.vchans
105 2) /dev/dspr%d.%d has been deprecated. Each channel now has its
106 own chardev in the form of "dsp%d.<function>%d", where <function>
107 is p = playback, r = record and v = virtual, respectively. Users
108 are encouraged to use these devs instead of (old) "/dev/dsp%d.%d".
109 This does not affect those who are using "/dev/dsp".
112 The following binaries have been disconnected from the build:
113 mount_devfs, mount_ext2fs, mount_fdescfs, mount_procfs, mount_linprocfs,
114 and mount_std. The functionality of these programs has been
115 moved into the mount program. For example, to mount a devfs
116 filesystem, instead of using mount_devfs, use: "mount -t devfs".
117 This does not affect entries in /etc/fstab, since entries in
118 /etc/fstab are always processed with "mount -t fstype".
121 Support for PCI Message Signalled Interrupts on i386 and amd64
122 has been added to the kernel and various drivers will soon be
123 updated to use MSI when it is available. If there are any problems,
124 MSI can be disabled completely by setting the 'hw.pci.enable_msi'
125 and 'hw.pci.enable_msix' tunables to 0 in the loader.
128 The MUTEX_PROFILING option has been renamed to LOCK_PROFILING.
129 The lockmgr object layout has been changed as a result of having
130 a lock_object embedded in it. As a consequence all file system
131 kernel modules must be re-compiled. The mutex profiling man page
132 has not yet been updated to reflect this change.
135 KSE in the kernel has now been made optional and turned on by
136 default. Use 'nooption KSE' in your kernel config to turn it
137 off. All kernel modules *must* be recompiled after this change.
138 There-after, modules from a KSE kernel should be compatible with
139 modules from a NOKSE kernel due to the temporary padding fields
140 added to 'struct proc'.
143 mrouted and its utilities have been removed from the base system.
146 Some ioctl(2) command codes have changed. Full backward ABI
147 compatibility is provided if the "options COMPAT_FREEBSD6" is
148 present in the kernel configuration file. Make sure to add
149 this option to your kernel config file, or recompile X.Org
150 and the rest of ports; otherwise they may refuse to work.
153 tcpslice has been removed from the base system.
156 The sizes of struct tcpcb (and struct xtcpcb) have changed due to
157 the rewrite of TCP syncookies. Tools like netstat, sockstat, and
158 systat needs to be rebuilt.
161 libpcap updated to v0.9.4 and tcpdump to v3.9.4
164 The IPFIREWALL_FORWARD_EXTENDED option is gone and the behaviour
165 for IPFIREWALL_FORWARD is now as it was before when it was first
166 committed and for years after. The behaviour is now ON.
169 enigma(1)/crypt(1) utility has been changed on 64 bit architectures.
170 Now it can decrypt files created from different architectures.
171 Unfortunately, it is no longer able to decrypt a cipher text
172 generated with an older version on 64 bit architectures.
173 If you have such a file, you need old utility to decrypt it.
176 The interface version of the i4b kernel part has changed. So
177 after updating the kernel sources and compiling a new kernel,
178 the i4b user space tools in "/usr/src/usr.sbin/i4b" must also
179 be rebuilt, and vice versa.
182 The XBOX kernel now defaults to the nfe(4) driver instead of
183 the nve(4) driver. Please update your configuration
187 The i386-only lnc(4) driver for the AMD Am7900 LANCE and Am79C9xx
188 PCnet family of NICs has been removed. The new le(4) driver serves
189 as an equivalent but cross-platform replacement with the pcn(4)
190 driver still providing performance-optimized support for the subset
191 of AMD Am79C971 PCnet-FAST and greater chips as before.
194 The machdep.* sysctls and the adjkerntz utility have been
195 modified a bit. The new adjkerntz utility uses the new
196 sysctl names and sysctlbyname() calls, so it may be impossible
197 to run an old /sbin/adjkerntz utility in single-user mode
198 with a new kernel. Replace the `adjkerntz -i' step before
199 `make installworld' with:
201 /usr/obj/usr/src/sbin/adjkerntz/adjkerntz -i
203 and proceed as usual with the rest of the installworld-stage
204 steps. Otherwise, you risk installing binaries with their
205 timestamp set several hours in the future, especially if
206 you are running with local time set to GMT+X hours.
209 The ip6fw utility has been removed. The behavior provided by
210 ip6fw has been in ipfw2 for a good while and the rc.d scripts
211 have been updated to deal with it. There are some rules that
212 might not migrate cleanly. Use rc.firewall6 as a template to
216 The puc(4) driver has been overhauled. The ebus(4) and sbus(4)
217 attachments have been removed. Make sure to configure scc(4)
218 on sparc64. Note also that by default puc(4) will use uart(4)
219 and not sio(4) for serial ports because interrupt handling has
220 been optimized for multi-port serial cards and only uart(4)
221 implements the interface to support it.
224 The scc(4) driver replaces puc(4) for Serial Communications
225 Controllers (SCCs) like the Siemens SAB82532 and the Zilog
226 Z8530. On sparc64, it is advised to add scc(4) to the kernel
227 configuration to make sure that the serial ports remain
231 Most world/kernel related NO_* build options changed names.
232 New knobs have common prefixes WITHOUT_*/WITH_* (modelled
233 after FreeBSD ports) and should be set in /etc/src.conf
234 (the src.conf(5) manpage is provided). Full backwards
235 compatibility is maintained for the time being though it's
236 highly recommended to start moving old options out of the
237 system-wide /etc/make.conf file into the new /etc/src.conf
238 while also properly renaming them. More conversions will
239 likely follow. Posting to current@:
241 http://lists.freebsd.org/pipermail/freebsd-current/2006-March/061725.html
244 The NETSMBCRYPTO kernel option has been retired because its
245 functionality is always included in NETSMB and smbfs.ko now.
248 The TDFX_LINUX kernel option was retired and replaced by the
249 tdfx_linux device. The latter can be loaded as the 3dfx_linux.ko
250 kernel module. Loading it alone should suffice to get 3dfx support
251 for Linux apps because it will pull in 3dfx.ko and linux.ko through
255 The 'audit' group was added to support the new auditing functionality
256 in the base system. Be sure to follow the directions for updating,
257 including the requirement to run mergemaster -p.
260 The kernel ABI to file system modules was changed on i386.
261 Please make sure that your kernel and modules are in sync.
264 This actually occured some time ago, but installing the kernel
265 now also installs a bunch of symbol files for the kernel modules.
266 This increases the size of /boot/kernel to about 67Mbytes. You
267 will need twice this if you will eventually back this up to kernel.old
268 on your next install.
269 If you have a shortage of room in your root partition, you should add
270 -DINSTALL_NODEBUG to your make arguments or add INSTALL_NODEBUG="yes"
271 to your /etc/make.conf.
274 libc's malloc implementation has been replaced. This change has the
275 potential to uncover application bugs that previously went unnoticed.
276 See the malloc(3) manual page for more details.
279 The generic netgraph(4) cookie has been changed. If you upgrade
280 kernel passing this point, you also need to upgrade userland
281 and netgraph(4) utilities like ports/net/mpd or ports/net/mpd4.
284 si(4)'s device files now contain the unit number.
285 Uses of {cua,tty}A[0-9a-f] should be replaced by {cua,tty}A0[0-9a-f].
288 The kernel ABI was mostly destroyed due to a change in the size
289 of struct lock_object which is nested in other structures such
290 as mutexes which are nested in all sorts of other structures.
291 Make sure your kernel and modules are in sync.
294 The page coloring algorithm in the VM subsystem was converted
295 from tuning with kernel options to autotuning. Please remove
296 any PQ_* option except PQ_NOOPT from your kernel config.
299 The net80211-related tools in the tools/tools/ath directory
300 have been moved to tools/tools/net80211 and renamed with a
301 "wlan" prefix. Scripts that use them should be adjusted
305 Scripts in the local_startup directories (as defined in
306 /etc/defaults/rc.conf) that have the new rc.d semantics will
307 now be run as part of the base system rcorder. If there are
308 errors or problems with one of these local scripts, it could
309 cause boot problems. If you encounter such problems, boot in
310 single user mode, remove that script from the */rc.d directory.
311 Please report the problem to the port's maintainer, and the
312 freebsd-ports@freebsd.org mailing list.
315 The nodev mount option was deprecated in RELENG_6 (where it
316 was a no-op), and is now unsupported. If you have nodev or dev listed
317 in /etc/fstab, remove it, otherwise it will result in a mount error.
320 ABI between ipfw(4) and ipfw(8) has been changed. You need
321 to rebuild ipfw(8) when rebuilding kernel.
324 rp(4)'s device files now contain the unit number.
325 Uses of {cua,tty}R[0-9a-f] should be replaced by {cua,tty}R0[0-9a-f].
328 /etc/rc.d/ppp-user has been renamed to /etc/rc.d/ppp.
329 Its /etc/rc.conf.d configuration file has been `ppp' from
330 the beginning, and hence there is no need to touch it.
333 Now most modules get their build-time options from the kernel
334 configuration file. A few modules still have fixed options
335 due to their non-conformant implementation, but they will be
336 corrected eventually. You may need to review the options of
337 the modules in use, explicitly specify the non-default options
338 in the kernel configuration file, and rebuild the kernel and
342 kern.polling.enable sysctl MIB is now deprecated. Use ifconfig(8)
343 to turn polling(4) on your interfaces.
346 The old bridge(4) implementation was retired. The new
347 if_bridge(4) serves as a full functional replacement.
350 The ai_addrlen of a struct addrinfo was changed to a socklen_t
351 to conform to POSIX-2001. This change broke an ABI
352 compatibility on 64 bit architecture. You have to recompile
353 userland programs that use getaddrinfo(3) on 64 bit
357 RELENG_6 branched here.
360 The pccard_ifconfig rc.conf variable has been removed and a new
361 variable, ifconfig_DEFAULT has been introduced. Unlike
362 pccard_ifconfig, ifconfig_DEFAULT applies to ALL interfaces that
363 do not have ifconfig_ifn entries rather than just those in
364 removable_interfaces.
367 Some previous versions of PAM have permitted the use of
368 non-absolute paths in /etc/pam.conf or /etc/pam.d/* when referring
369 to third party PAM modules in /usr/local/lib. A change has been
370 made to require the use of absolute paths in order to avoid
371 ambiguity and dependence on library path configuration, which may
372 affect existing configurations.
375 Major changes to network interface API. All drivers must be
376 recompiled. Drivers not in the base system will need to be
377 updated to the new APIs.
380 Changes were made to kinfo_proc in sys/user.h. Please recompile
381 userland, or commands like `fstat', `pkill', `ps', `top' and `w'
382 will not behave correctly.
384 The API and ABI for hwpmc(4) have changed with the addition
385 of sampling support. Please recompile lib/libpmc(3) and
386 usr.sbin/{pmcstat,pmccontrol}.
389 The OpenBSD dhclient was imported in place of the ISC dhclient
390 and the network interface configuration scripts were updated
391 accordingly. If you use DHCP to configure your interfaces, you
392 must now run devd. Also, DNS updating was lost so you will need
393 to find a workaround if you use this feature.
395 The '_dhcp' user was added to support the OpenBSD dhclient. Be
396 sure to run mergemaster -p (like you are supposed to do every time
400 if_bridge was added to the tree. This has changed struct ifnet.
401 Please recompile userland and all network related modules.
404 The n_net of a struct netent was changed to an uint32_t, and
405 1st argument of getnetbyaddr() was changed to an uint32_t, to
406 conform to POSIX-2001. These changes broke an ABI
407 compatibility on 64 bit architecture. With these changes,
408 shlib major of libpcap was bumped. You have to recompile
409 userland programs that use getnetbyaddr(3), getnetbyname(3),
410 getnetent(3) and/or libpcap on 64 bit architecture.
413 Kernel parsing of extra options on '#!' first lines of shell
414 scripts has changed. Lines with multiple options likely will
415 fail after this date. For full details, please see
416 http://people.freebsd.org/~gad/Updating-20050528.txt
419 The packet filter (pf) code has been updated to OpenBSD 3.7
420 Please note the changed anchor syntax and the fact that
421 authpf(8) now needs a mounted fdescfs(5) to function.
424 The NO_MIXED_MODE kernel option has been removed from the i386
425 amd64 platforms as its use has been superceded by the new local
426 APIC timer code. Any kernel config files containing this option
430 The on-disk format of LC_CTYPE files was changed to be machine
431 independent. Please make sure NOT to use NO_CLEAN buildworld
432 when crossing this point. Crossing this point also requires
433 recompile or reinstall of all locale depended packages.
436 The ifi_epoch member of struct if_data has been changed to
437 contain the uptime at which the interface was created or the
438 statistics zeroed rather then the wall clock time because
439 wallclock time may go backwards. This should have no impact
440 unless an snmp implementation is using this value (I know of
444 The acpi_perf and acpi_throttle drivers are now part of the
445 acpi(4) main module. They are no longer built separately.
448 The layout of struct image_params has changed. You have to
449 recompile all compatibility modules (linux, svr4, etc) for use
453 The p4tcc driver has been merged into cpufreq(4). This makes
454 "options CPU_ENABLE_TCC" obsolete. Please load cpufreq.ko or
455 compile in "device cpufreq" to restore this functionality.
458 The responsibility of recomputing the file system summary of
459 a SoftUpdates-enabled dirty volume has been transferred to the
460 background fsck. A rebuild of fsck(8) utility is recommended
461 if you have updated the kernel.
463 To get the old behavior (recompute file system summary at mount
464 time), you can set vfs.ffs.compute_summary_at_mount=1 before
465 mounting the new volume.
468 The cpufreq import is complete. As part of this, the sysctls for
469 acpi(4) throttling have been removed. The power_profile script
470 has been updated, so you can use performance/economy_cpu_freq in
471 rc.conf(5) to set AC on/offline cpu frequencies.
474 NG_VERSION has been increased. Recompiling kernel (or ng_socket.ko)
475 requires recompiling libnetgraph and userland netgraph utilities.
478 Support for abbreviated forms of a number of ipfw options is
479 now deprecated. Warnings are printed to stderr indicating the
480 correct full form when a match occurs. Some abbreviations may
481 be supported at a later date based on user feedback. To be
482 considered for support, abbreviations must be in use prior to
483 this commit and unlikely to be confused with current key words.
486 By a popular demand, a lot of NOFOO options were renamed
487 to NO_FOO (see bsd.compat.mk for a full list). The old
488 spellings are still supported, but will cause annoying
489 warnings on stderr. Make sure you upgrade properly (see
490 the COMMON ITEMS: section later in this file).
493 Auto-loading of ancillary wlan modules such as wlan_wep has
494 been temporarily disabled; you need to statically configure
495 the modules you need into your kernel or explicitly load them
496 prior to use. Specifically, if you intend to use WEP encryption
497 with an 802.11 device load/configure wlan_wep; if you want to
498 use WPA with the ath driver load/configure wlan_tkip, wlan_ccmp,
499 and wlan_xauth as required.
502 The behaviour of ppp(8) has changed slightly. If lqr is enabled
503 (``enable lqr''), older versions would revert to LCP ECHO mode on
504 negotiation failure. Now, ``enable echo'' is required for this
505 behaviour. The ppp version number has been bumped to 3.4.2 to
509 The wlan support has been updated to split the crypto support
510 into separate modules. For static WEP you must configure the
511 wlan_wep module in your system or build and install the module
512 in place where it can be loaded (the kernel will auto-load
513 the module when a wep key is configured).
516 The ath driver has been updated to split the tx rate control
517 algorithm into a separate module. You need to include either
518 ath_rate_onoe or ath_rate_amrr when configuring the kernel.
521 Support for systems with an 80386 CPU has been removed. Please
522 use FreeBSD 5.x or earlier on systems with an 80386.
525 We have had a hack which would mount the root filesystem
526 R/W if the device were named 'md*'. As part of the vnode
527 work I'm doing I have had to remove this hack. People
528 building systems which use preloaded MD root filesystems
529 may need to insert a "/sbin/mount -u -o rw /dev/md0 /" in
530 their /etc/rc scripts.
533 FreeBSD 5.3 shipped here.
536 The size of struct tcpcb has changed again due to the removal
537 of RFC1644 T/TCP. You have to recompile userland programs that
538 read kmem for tcp sockets directly (netstat, sockstat, etc.)
541 The size of struct tcpcb has changed. You have to recompile
542 userland programs that read kmem for tcp sockets directly
543 (netstat, sockstat, etc.)
546 RELENG_5 branched here. For older entries, please see updating
547 in the RELENG_5 branch.
553 Avoid using make -j when upgrading. From time to time in the
554 past there have been problems using -j with buildworld and/or
555 installworld. This is especially true when upgrading between
556 "distant" versions (eg one that cross a major release boundary
557 or several minor releases, or when several months have passed
558 on the -current branch).
560 Sometimes, obscure build problems are the result of environment
561 poisoning. This can happen because the make utility reads its
562 environment when searching for values for global variables.
563 To run your build attempts in an "environmental clean room",
564 prefix all make commands with 'env -i '. See the env(1) manual
565 page for more details.
567 When upgrading from one major version to another it is generally
568 best to upgrade to the latest code in the currently installed branch
569 first, then do an upgrade to the new branch. This is the best-tested
570 upgrade path, and has the highest probability of being successful.
571 Please try this approach before reporting problems with a major
576 If you are updating from a prior version of FreeBSD (even one just
577 a few days old), you should follow this procedure. It is the most
578 failsafe as it uses a /usr/obj tree with a fresh mini-buildworld,
580 make kernel-toolchain
581 make -DALWAYS_CHECK_MAKE buildkernel KERNCONF=YOUR_KERNEL_HERE
582 make -DALWAYS_CHECK_MAKE installkernel KERNCONF=YOUR_KERNEL_HERE
584 To test a kernel once
585 ---------------------
586 If you just want to boot a kernel once (because you are not sure
587 if it works, or if you want to boot a known bad kernel to provide
588 debugging information) run
589 make installkernel KERNCONF=YOUR_KERNEL_HERE KODIR=/boot/testkernel
590 nextboot -k testkernel
592 To just build a kernel when you know that it won't mess you up
593 --------------------------------------------------------------
594 This assumes you are already running a 5.X system. Replace
595 ${arch} with the architecture of your machine (e.g. "i386",
596 "alpha", "amd64", "ia64", "pc98", "sparc64", etc).
598 cd src/sys/${arch}/conf
599 config KERNEL_NAME_HERE
600 cd ../compile/KERNEL_NAME_HERE
605 If this fails, go to the "To build a kernel" section.
607 To rebuild everything and install it on the current system.
608 -----------------------------------------------------------
609 # Note: sometimes if you are running current you gotta do more than
610 # is listed here if you are upgrading from a really old current.
612 <make sure you have good level 0 dumps>
614 make kernel KERNCONF=YOUR_KERNEL_HERE
616 <reboot in single user> [3]
624 To cross-install current onto a separate partition
625 --------------------------------------------------
626 # In this approach we use a separate partition to hold
627 # current's root, 'usr', and 'var' directories. A partition
628 # holding "/", "/usr" and "/var" should be about 2GB in
631 <make sure you have good level 0 dumps>
634 make buildkernel KERNCONF=YOUR_KERNEL_HERE
635 <maybe newfs current's root partition>
636 <mount current's root partition on directory ${CURRENT_ROOT}>
637 make installworld DESTDIR=${CURRENT_ROOT}
638 make distribution DESTDIR=${CURRENT_ROOT} # if newfs'd
639 make installkernel KERNCONF=YOUR_KERNEL_HERE DESTDIR=${CURRENT_ROOT}
640 cp /etc/fstab ${CURRENT_ROOT}/etc/fstab # if newfs'd
641 <edit ${CURRENT_ROOT}/etc/fstab to mount "/" from the correct partition>
642 <reboot into current>
643 <do a "native" rebuild/install as described in the previous section>
644 <maybe install compatibility libraries from src/lib/compat>
648 To upgrade in-place from 5.x-stable to current
649 ----------------------------------------------
650 <make sure you have good level 0 dumps>
652 make kernel KERNCONF=YOUR_KERNEL_HERE [8]
654 <reboot in single user> [3]
661 Make sure that you've read the UPDATING file to understand the
662 tweaks to various things you need. At this point in the life
663 cycle of current, things change often and you are on your own
664 to cope. The defaults can also change, so please read ALL of
665 the UPDATING entries.
667 Also, if you are tracking -current, you must be subscribed to
668 freebsd-current@freebsd.org. Make sure that before you update
669 your sources that you have read and understood all the recent
670 messages there. If in doubt, please track -stable which has
673 [1] If you have third party modules, such as vmware, you
674 should disable them at this point so they don't crash your
677 [3] From the bootblocks, boot -s, and then do
682 adjkerntz -i # if CMOS is wall time
683 Also, when doing a major release upgrade, it is required that
684 you boot into single user mode to do the installworld.
686 [4] Note: This step is non-optional. Failure to do this step
687 can result in a significant reduction in the functionality of the
688 system. Attempting to do it by hand is not recommended and those
689 that pursue this avenue should read this file carefully, as well
690 as the archives of freebsd-current and freebsd-hackers mailing lists
691 for potential gotchas.
693 [5] Usually this step is a noop. However, from time to time
694 you may need to do this if you get unknown user in the following
695 step. It never hurts to do it all the time. You may need to
696 install a new mergemaster (cd src/usr.sbin/mergemaster && make
697 install) after the buildworld before this step if you last updated
698 from current before 20020224 or from -stable before 20020408.
700 [8] In order to have a kernel that can run the 4.x binaries
701 needed to do an installworld, you must include the COMPAT_FREEBSD4
702 option in your kernel. Failure to do so may leave you with a system
703 that is hard to boot to recover. A similar kernel option COMPAT_FREEBSD5
704 is required to run the 5.x binaries on more recent kernels.
706 Make sure that you merge any new devices from GENERIC since the
707 last time you updated your kernel config file.
709 [9] When checking out sources, you must include the -P flag to have
710 cvs prune empty directories.
712 If CPUTYPE is defined in your /etc/make.conf, make sure to use the
713 "?=" instead of the "=" assignment operator, so that buildworld can
714 override the CPUTYPE if it needs to.
716 MAKEOBJDIRPREFIX must be defined in an environment variable, and
717 not on the command line, or in /etc/make.conf. buildworld will
718 warn if it is improperly defined.
721 This file contains a list, in reverse chronological order, of major
722 breakages in tracking -current. Not all things will be listed here,
723 and it only starts on October 16, 2004. Updating files can found in
724 previous releases if your system is older than this.
726 Copyright information:
728 Copyright 1998-2005 M. Warner Losh. All Rights Reserved.
730 Redistribution, publication, translation and use, with or without
731 modification, in full or in part, in any form or format of this
732 document are permitted without further permission from the author.
734 THIS DOCUMENT IS PROVIDED BY WARNER LOSH ``AS IS'' AND ANY EXPRESS OR
735 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
736 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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