xref: /freebsd-13.1/UPDATING (revision eb008a67)
1 Updating Information for FreeBSD stable/13 users.
2
3This file is maintained and copyrighted by M. Warner Losh <[email protected]>.
4See end of file for further details.  For commonly done items, please see the
5COMMON ITEMS: section later in the file.  These instructions assume that you
6basically know what you are doing.  If not, then please consult the FreeBSD
7handbook:
8
9    https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
10
11Items affecting the ports and packages system can be found in
12/usr/ports/UPDATING.  Please read that file before running portupgrade.
13
1420210202:
15	Various LinuxKPI functionality was added which conflicts with DRM.
16	Please update your drm-kmod port to after the __FreeBSD_verison 1300139
17	update.
18
1920210122:
20	The stable/13 branch has been created from main.
21
2220210108:
23	PC Card attachments for all devices have been removed. In the case of
24	wi and cmx, the entire drivers were removed because they were only
25	PC Card devices. FreeBSD_version 1300134 should be used for this
26	since it was bumped so recently.
27
2820210107:
29	Transport-independent parts of HID support have been split off the USB
30	code in to separate subsystem.  Kernel configs which include one of
31	ums, ukbd, uhid, atp, wsp, wmt, uaudio, ugold or ucycom drivers should
32	be updated with adding of "device hid" line.
33
3420210105:
35	ncurses installation has been modified to only keep the widechar
36	enabled version.  Incremental build is broken for that change, so it
37	requires a clean build.
38
3920201223:
40	The FreeBSD project has migrated from Subversion to Git. Temporary
41	instructions can be found at
42	https://github.com/bsdimp/freebsd-git-docs/blob/main/src-cvt.md
43	and other documents in that repo.
44
4520201216:
46	The services database has been updated to cover more of the basic
47	services expected in a modern system. The database is big enough
48	that it will cause issues in mergemaster in Releases previous to
49	12.2 and 11.3, or in very old current systems from before r358154.
50
5120201215:
52	Obsolete in-tree GDB 6.1.1 has been removed.  GDB (including kgdb)
53	may be installed from ports or packages.
54
5520201124:
56	ping6 has been merged into ping.  It can now be called as "ping -6".
57	See ping(8) for details.
58
5920201108:
60	Default value of net.add_addr_allfibs has been changed to 0.
61	If you have multi-fib configuration and rely on existence of all
62	interface routes in every fib, you need to set the above sysctl to 1.
6320201030:
64	The internal pre-processor in the calendar(1) program has been
65	extended to support more C pre-processor commands (e.g. #ifdef, #else,
66	and #undef) and to detect unbalanced conditional statements.
67	Error messages have been extended to include the filename and line
68	number if processing stops to help fixing malformed data files.
69
7020201026:
71	All the data files for the calendar(1) program, except calendar.freebsd,
72	have been moved to the deskutils/calendar-data port, much like the
73	jewish calendar entries were moved to deskutils/hebcal years ago. After
74	make delete-old-files, you need to install it to retain full
75	functionality. calendar(1) will issue a reminder for files it can't
76	find.
77
7820200923:
79	LINT files are no longer generated. We now include the relevant NOTES
80	files. Note: This may cause conflicts with updating in some cases.
81	        find sys -name LINT\* -delete
82	is suggested across this commit	to remove the generated	LINT files.
83
84	If you have tried to update with generated files there, the svn
85	command you want to un-auger the tree is
86		cd sys/amd64/conf
87		svn revert -R .
88	and then do the above find from the top level. Substitute 'amd64'
89	above with where the error message indicates a conflict.
90
9120200824:
92	OpenZFS support has been integrated. Do not upgrade root pools until
93	the loader is updated to support zstd. Furthermore, we caution against
94	'zpool upgrade' for the next few weeks. The change should be transparent
95	unless you  want to use new features.
96
97	Not all "NO_CLEAN" build scenarios work across these changes. Many
98	scenarios have been tested and fixed, but rebuilding kernels without
99	rebuilding world may fail.
100
101	The ZFS cache file has moved from /boot to /etc to match the OpenZFS
102	upstream default. A fallback to /boot has been added for mountroot.
103
104	Pool auto import behavior at boot has been moved from the kernel module
105	to an explicit "zpool import -a" in one of the rc scripts enabled by
106	zfs_enable=YES. This means your non-root zpools won't auto import until
107	you upgrade your /etc/rc.d files.
108
10920200824:
110	The resume code now notifies devd with the 'kernel' system
111	rather than the old 'kern' subsystem to be consistent with
112	other use. The old notification will be created as well, but
113	will be removed prior to FreeBSD 14.0.
114
11520200821:
116	r362275 changed the internal API between the kernel RPC and the
117	NFS modules. As such, all the modules must be recompiled from
118	sources.
119
12020200817:
121	r364330 modified the internal API used between the NFS modules.
122	As such, all the NFS modules must be re-compiled from sources.
123
12420200816:
125	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
126	been upgraded to 11.0.0.  Please see the 20141231 entry below for
127	information about prerequisites and upgrading, if you are not already
128	using clang 3.5.0 or higher.
129
13020200810:
131	r364092 modified the internal ABI used between the kernel NFS
132	modules.  As such, all of these modules need to be rebuilt
133	from sources, so a version bump was done.
134
13520200807:
136	Makefile.inc has been updated to work around the issue documented in
137	20200729. It was a case where the optimization of using symbolic links
138	to point to binaries created a situation where we'd run new binaries
139	with old libraries starting midway through the installworld process.
140
14120200729:
142	r363679 has redefined some undefined behavior in regcomp(3); notably,
143	extraneous escapes of most ordinary characters will no longer be
144	accepted.  An exp-run has identified all of the problems with this in
145	ports, but other non-ports software may need extra escapes removed to
146	continue to function.
147
148	Because of this change, installworld may encounter the following error
149	from rtld: Undefined symbol "regcomp@FBSD_1.6" -- It is imperative that
150	you do not halt installworld. Instead, let it run to completion (whether
151	successful or not) and run installworld once more.
152
15320200627:
154	A new implementation of bc and dc has been imported in r362681. This
155	implementation corrects non-conformant behavior of the previous bc
156	and adds GNU bc compatible options. It offers a number of extensions,
157	is much faster on large values, and has support for message catalogs
158	(a number of languages are already supported, contributions of further
159	languages welcome). The option WITHOUT_GH_BC can be used to build the
160	world with the previous versions of bc and dc.
161
16220200625:
163	r362639 changed the internal API used between the NFS kernel modules.
164	As such, they all need to be rebuilt from sources.
165
16620200613:
167	r362158 changed the arguments for VFS_CHECKEXP().  As such, any
168	out of tree file systems need to be modified and rebuilt.
169	Also, any file systems that are modules must be rebuilt.
170
17120200604:
172	read(2) of a directory fd is now rejected by default.  root may
173	re-enable it for system root only on non-ZFS filesystems with the
174	security.bsd.allow_read_dir sysctl(8) MIB if
175	security.bsd.suser_enabled=1.
176
177	It may be advised to setup aliases for grep to default to `-d skip` if
178	commonly non-recursively grepping a list that includes directories and
179	the potential for the resulting stderr output is not tolerable.  Example
180	aliases are now installed, commented out, in /root/.cshrc and
181	/root/.shrc.
182
18320200523:
184	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
185	been upgraded to 10.0.1.  Please see the 20141231 entry below for
186	information about prerequisites and upgrading, if you are not already
187	using clang 3.5.0 or higher.
188
18920200512:
190	Support for obsolete compilers has been removed from the build system.
191	Clang 6 and GCC 6.4 are the minimum supported versions.
192
19320200424:
194	closefrom(2) has been moved under COMPAT12, and replaced in libc with a
195	stub that calls close_range(2).  If using a custom kernel configuration,
196	you may want to ensure that the COMPAT_FREEBSD12 option is included, as
197	a slightly older -CURRENT userland and older FreeBSD userlands may not
198	be functional without closefrom(2).
199
20020200414:
201	Upstream DTS from Linux 5.6 was merged and they now have the SID
202	and THS (Secure ID controller and THermal Sensor) node present.
203	The DTB overlays have now been removed from the tree for the H3/H5 and
204	A64 SoCs and the aw_sid and aw_thermal driver have been updated to
205	deal with upstream DTS. If you are using those overlays you need to
206	remove them from loader.conf and update the DTBs on the FAT partition.
207
20820200310:
209	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
210	been upgraded to 10.0.0.  Please see the 20141231 entry below for
211	information about prerequisites and upgrading, if you are not already
212	using clang 3.5.0 or higher.
213
21420200309:
215	The amd(8) automount daemon has been removed from the source tree.
216	As of FreeBSD 10.1 autofs(5) is the preferred tool for automounting.
217	amd is still available in the sysutils/am-utils port.
218
21920200301:
220	Removed brooktree driver (bktr.4) from the tree.
221
22220200229:
223	The WITH_GPL_DTC option has been removed.  The BSD-licenced device tree
224	compiler in usr.bin/dtc is used on all architectures which use dtc, and
225	the GPL dtc is available (if needed) from the sysutils/dtc port.
226
22720200229:
228	The WITHOUT_LLVM_LIBUNWIND option has been removed.  LLVM's libunwind
229	is used by all supported CPU architectures.
230
23120200229:
232	GCC 4.2.1 has been removed from the tree.  The WITH_GCC,
233	WITH_GCC_BOOTSTRAP, and WITH_GNUCXX options are no longer available.
234	Users who wish to build FreeBSD with GCC must use the external toolchain
235	ports or packages.
236
23720200220:
238	ncurses has been updated to a newer version (6.2-20200215). Given the ABI
239	has changed, users will have to rebuild all the ports that are linked to
240	ncurses.
241
24220200217:
243	The size of struct vnet and the magic cookie have changed.
244	Users need to recompile libkvm and all modules using VIMAGE
245	together with their new kernel.
246
24720200212:
248	Defining the long deprecated NO_CTF, NO_DEBUG_FILES, NO_INSTALLLIB,
249	NO_MAN, NO_PROFILE, and NO_WARNS variables is now an error.  Update
250	your Makefiles and scripts to define MK_<var>=no instead as required.
251
252	One exception to this is that program or library Makefiles should
253	define MAN to empty rather than setting MK_MAN=no.
254
25520200108:
256	Clang/LLVM is now the default compiler and LLD the default
257	linker for riscv64.
258
25920200107:
260	make universe no longer uses GCC 4.2.1 on any architectures.
261	Architectures not supported by in-tree Clang/LLVM require an
262	external toolchain package.
263
26420200104:
265	GCC 4.2.1 is now not built by default, as part of the GCC 4.2.1
266	retirement plan.  Specifically, the GCC, GCC_BOOTSTRAP, and GNUCXX
267	options default to off for all supported CPU architectures.  As a
268	short-term transition aid they may be enabled via WITH_* options.
269	GCC 4.2.1 is expected to be removed from the tree on 2020-03-31.
270
27120200102:
272	Support for armv5 has been disconnected and is being removed. The
273	machine combination MACHINE=arm MACHINE_ARCH=arm is no longer valid.
274	You must now use a MACHINE_ARCH of armv6 or armv7. The default
275	MACHINE_ARCH for MACHINE=arm is now armv7.
276
27720191226:
278	Clang/LLVM is now the default compiler for all powerpc architectures.
279	LLD is now the default linker for powerpc64.  The change for powerpc64
280	also includes a change to the ELFv2 ABI, incompatible with the existing
281	ABI.
282
28320191226:
284	Kernel-loadable random(4) modules are no longer unloadable.
285
28620191222:
287	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
288	been upgraded to 9.0.1.  Please see the 20141231 entry below for
289	information about prerequisites and upgrading, if you are not already
290	using clang 3.5.0 or higher.
291
29220191212:
293	r355677 has modified the internal interface used between the
294	NFS modules in the kernel. As such, they must all be upgraded
295	simultaneously. I will do a version bump for this.
296
29720191205:
298	The root certificates of the Mozilla CA Certificate Store have been
299	imported into the base system and can be managed with the certctl(8)
300	utility.  If you have installed the security/ca_root_nss port or package
301	with the ETCSYMLINK option (the default), be advised that there may be
302	differences between those included in the port and those included in
303	base due to differences in nss branch used as well as general update
304	frequency.  Note also that certctl(8) cannot manage certs in the
305	format used by the security/ca_root_nss port.
306
30720191120:
308	The amd(8) automount daemon has been disabled by default, and will be
309	removed in the future.  As of FreeBSD 10.1 the autofs(5) is available
310	for automounting.
311
31220191107:
313	The nctgpio and wbwd drivers have been moved to the superio bus.
314	If you have one of these drivers in a kernel configuration, then
315	you should add device superio to it.  If you use one of these drivers
316	as a module and you compile a custom set of modules, then you should
317	add superio to the set.
318
31920191021:
320	KPIs for network drivers to access interface addresses have changed.
321	Users need to recompile NIC driver modules together with kernel.
322
32320191021:
324	The net.link.tap.user_open sysctl no longer prevents user opening of
325	already created /dev/tapNN devices.  Access is still controlled by
326	node permissions, just like tun devices.  The net.link.tap.user_open
327	sysctl is now used only to allow users to perform devfs cloning of
328	tap devices, and the subsequent open may not succeed if the user is not
329	in the appropriate group.  This sysctl may be deprecated/removed
330	completely in the future.
331
33220191009:
333	mips, powerpc, and sparc64 are no longer built as part of
334	universe / tinderbox unless MAKE_OBSOLETE_GCC is defined. If
335	not defined, mips, powerpc, and sparc64 builds will look for
336	the xtoolchain binaries and if installed use them for universe
337	builds. As llvm 9.0 becomes vetted for these architectures, they
338	will be removed from the list.
339
34020191009:
341	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
342	been upgraded to 9.0.0.  Please see the 20141231 entry below for
343	information about prerequisites and upgrading, if you are not already
344	using clang 3.5.0 or higher.
345
34620191003:
347	The hpt27xx, hptmv, hptnr, and hptrr drivers have been removed from
348	GENERIC.  They are available as modules and can be loaded by adding
349	to /boot/loader.conf hpt27xx_load="YES", hptmv_load="YES",
350	hptnr_load="YES", or hptrr_load="YES", respectively.
351
35220190913:
353	ntpd no longer by default locks its pages in memory, allowing them
354	to be paged out by the kernel. Use rlimit memlock to restore
355	historic BSD behaviour. For example, add "rlimit memlock 32"
356	to ntp.conf to lock up to 32 MB of ntpd address space in memory.
357
35820190823:
359	Several of ping6's options have been renamed for better consistency
360	with ping.  If you use any of -ARWXaghmrtwx, you must update your
361	scripts.  See ping6(8) for details.
362
36320190727:
364	The vfs.fusefs.sync_unmount and vfs.fusefs.init_backgrounded sysctls
365	and the "-o sync_unmount" and "-o init_backgrounded" mount options have
366	been removed from mount_fusefs(8).  You can safely remove them from
367	your scripts, because they had no effect.
368
369	The vfs.fusefs.fix_broken_io, vfs.fusefs.sync_resize,
370	vfs.fusefs.refresh_size, vfs.fusefs.mmap_enable,
371	vfs.fusefs.reclaim_revoked, and vfs.fusefs.data_cache_invalidate
372	sysctls have been removed.  If you felt the need to set any of them to
373	a non-default value, please tell [email protected] why.
374
37520190713:
376	Default permissions on the /var/account/acct file (and copies of it
377	rotated by periodic daily scripts) are changed from 0644 to 0640
378	because the file contains sensitive information that should not be
379	world-readable.  If the /var/account directory must be created by
380	rc.d/accounting, the mode used is now 0750.  Admins who use the
381	accounting feature are encouraged to change the mode of an existing
382	/var/account directory to 0750 or 0700.
383
38420190620:
385	Entropy collection and the /dev/random device are no longer optional
386	components.  The "device random" option has been removed.
387	Implementations of distilling algorithms can still be made loadable
388	with "options RANDOM_LOADABLE" (e.g., random_fortuna.ko).
389
39020190612:
391	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
392	been upgraded to 8.0.1.  Please see the 20141231 entry below for
393	information about prerequisites and upgrading, if you are not already
394	using clang 3.5.0 or higher.
395
39620190608:
397	A fix was applied to i386 kernel modules to avoid panics with
398	dpcpu or vnet.  Users need to recompile i386 kernel modules
399	having pcpu or vnet sections or they will refuse to load.
400
40120190513:
402	User-wired pages now have their own counter,
403	vm.stats.vm.v_user_wire_count.  The vm.max_wired sysctl was renamed
404	to vm.max_user_wired and changed from an unsigned int to an unsigned
405	long.  bhyve VMs wired with the -S are now subject to the user
406	wiring limit; the vm.max_user_wired sysctl may need to be tuned to
407	avoid running into the limit.
408
40920190507:
410	The IPSEC option has been removed from GENERIC.  Users requiring
411	ipsec(4) must now load the ipsec(4) kernel module.
412
41320190507:
414	The tap(4) driver has been folded into tun(4), and the module has been
415	renamed to tuntap.  You should update any kld_list="if_tap" or
416	kld_list="if_tun" entries in /etc/rc.conf, if_tap_load="YES" or
417	if_tun_load="YES" entries in /boot/loader.conf to load the if_tuntap
418	module instead, and "device tap" or "device tun" entries in kernel
419	config files to select the tuntap device instead.
420
42120190418:
422	The following knobs have been added related to tradeoffs between
423	safe use of the random device and availability in the absence of
424	entropy:
425
426	kern.random.initial_seeding.bypass_before_seeding: tunable; set
427	non-zero to bypass the random device prior to seeding, or zero to
428	block random requests until the random device is initially seeded.
429	For now, set to 1 (unsafe) by default to restore pre-r346250 boot
430	availability properties.
431
432	kern.random.initial_seeding.read_random_bypassed_before_seeding:
433	read-only diagnostic sysctl that is set when bypass is enabled and
434	read_random(9) is bypassed, to enable programmatic handling of this
435	initial condition, if desired.
436
437	kern.random.initial_seeding.arc4random_bypassed_before_seeding:
438	Similar to the above, but for for arc4random(9) initial seeding.
439
440	kern.random.initial_seeding.disable_bypass_warnings: tunable; set
441	non-zero to disable warnings in dmesg when the same conditions are
442	met as for the diagnostic sysctls above.  Defaults to zero, i.e.,
443	produce warnings in dmesg when the conditions are met.
444
44520190416:
446	The loadable random module KPI has changed; the random_infra_init()
447	routine now requires a 3rd function pointer for a bool (*)(void)
448	method that returns true if the random device is seeded (and
449	therefore unblocked).
450
45120190404:
452	r345895 reverts r320698. This implies that an nfsuserd(8) daemon
453	built from head sources between r320757 (July 6, 2017) and
454	r338192 (Aug. 22, 2018) will not work unless the "-use-udpsock"
455	is added to the command line.
456	nfsuserd daemons built from head sources that are post-r338192 are
457	not affected and should continue to work.
458
45920190320:
460	The fuse(4) module has been renamed to fusefs(4) for consistency with
461	other filesystems.  You should update any kld_load="fuse" entries in
462	/etc/rc.conf, fuse_load="YES" entries in /boot/loader.conf, and
463	"options FUSE" entries in kernel config files.
464
46520190304:
466	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
467	8.0.0.  Please see the 20141231 entry below for information about
468	prerequisites and upgrading, if you are not already using clang 3.5.0
469	or higher.
470
47120190226:
472	geom_uzip(4) depends on the new module xz.  If geom_uzip is statically
473	compiled into your custom kernel, add 'device xz' statement to the
474	kernel config.
475
47620190219:
477	drm and drm2 have been removed from the tree. Please see
478	https://wiki.freebsd.org/Graphics for the latest information on
479	migrating to the drm ports.
480
48120190131:
482	Iflib is no longer unconditionally compiled into the kernel.  Drivers
483	using iflib and statically compiled into the kernel, now require
484	the 'device iflib' config option.  For the same drivers loaded as
485	modules on kernels not having 'device iflib', the iflib.ko module
486	is loaded automatically.
487
48820190125:
489	The IEEE80211_AMPDU_AGE and AH_SUPPORT_AR5416 kernel configuration
490	options no longer exist since r343219 and r343427 respectively;
491	nothing uses them, so they should be just removed from custom
492	kernel config files.
493
49420181230:
495	r342635 changes the way efibootmgr(8) works by requiring users to add
496	the -b (bootnum) parameter for commands where the bootnum was previously
497	specified with each option. For example 'efibootmgr -B 0001' is now
498	'efibootmgr -B -b 0001'.
499
50020181220:
501	r342286 modifies the NFSv4 server so that it obeys vfs.nfsd.nfs_privport
502	in the same as it is applied to NFSv2 and 3.  This implies that NFSv4
503	servers that have vfs.nfsd.nfs_privport set will only allow mounts
504	from clients using a reserved port#. Since both the FreeBSD and Linux
505	NFSv4 clients use reserved port#s by default, this should not affect
506	most NFSv4 mounts.
507
50820181219:
509	The XLP config has been removed. We can't support 64-bit atomics in this
510	kernel because it is running in 32-bit mode. XLP users must transition
511	to running a 64-bit kernel (XLP64 or XLPN32).
512
513	The mips GXEMUL support has been removed from FreeBSD. MALTA* + qemu is
514	the preferred emulator today and we don't need two different ones.
515
516	The old sibyte / swarm / Broadcom BCM1250 support has been
517	removed from the mips port.
518
51920181211:
520	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
521	7.0.1.  Please see the 20141231 entry below for information about
522	prerequisites and upgrading, if you are not already using clang 3.5.0
523	or higher.
524
52520181211:
526	Remove the timed and netdate programs from the base tree.  Setting
527	the time with these daemons has been obsolete for over a decade.
528
52920181126:
530	On amd64, arm64 and armv7 (architectures that install LLVM's ld.lld
531	linker as /usr/bin/ld) GNU ld is no longer installed as ld.bfd, as
532	it produces broken binaries when ifuncs are in use.  Users needing
533	GNU ld should install the binutils port or package.
534
53520181123:
536	The BSD crtbegin and crtend code has been enabled by default. It has
537	had extensive testing on amd64, arm64, and i386. It can be disabled
538	by building a world with -DWITHOUT_BSD_CRTBEGIN.
539
54020181115:
541	The set of CTM commands (ctm, ctm_smail, ctm_rmail, ctm_dequeue)
542	has been converted to a port (misc/ctm) and will be removed from
543	FreeBSD-13.  It is available as a package (ctm) for all supported
544	FreeBSD versions.
545
54620181110:
547	The default newsyslog.conf(5) file has been changed to only include
548	files in /etc/newsyslog.conf.d/ and /usr/local/etc/newsyslog.conf.d/ if
549	the filenames end in '.conf' and do not begin with a '.'.
550
551	You should check the configuration files in these two directories match
552	this naming convention. You can verify which configuration files are
553	being included using the command:
554		$ newsyslog -Nrv
555
55620181015:
557	Ports for the DRM modules have been simplified. Now, amd64 users should
558	just install the drm-kmod port. All others should install
559	drm-legacy-kmod.
560
561	Graphics hardware that's newer than about 2010 usually works with
562	drm-kmod.  For hardware older than 2013, however, some users will need
563	to use drm-legacy-kmod if drm-kmod doesn't work for them. Hardware older
564	than 2008 usually only works in drm-legacy-kmod. The graphics team can
565	only commit to hardware made since 2013 due to the complexity of the
566	market and difficulty to test all the older cards effectively. If you
567	have hardware supported by drm-kmod, you are strongly encouraged to use
568	that as you will get better support.
569
570	Other than KPI chasing, drm-legacy-kmod will not be updated. As outlined
571	elsewhere, the drm and drm2 modules will be eliminated from the src base
572	soon (with a limited exception for arm). Please update to the package
573	asap and report any issues to [email protected].
574
575	Generally, anybody using the drm*-kmod packages should add
576	WITHOUT_DRM_MODULE=t and WITHOUT_DRM2_MODULE=t to avoid nasty
577	cross-threading surprises, especially with automatic driver
578	loading from X11 startup. These will become the defaults in 13-current
579	shortly.
580
58120181012:
582	The ixlv(4) driver has been renamed to iavf(4).  As a consequence,
583	custom kernel and module loading configuration files must be updated
584	accordingly.  Moreover, interfaces previous presented as ixlvN to the
585	system are now exposed as iavfN and network configuration files must
586	be adjusted as necessary.
587
58820181009:
589	OpenSSL has been updated to version 1.1.1.  This update included
590	additional various API changes throughout the base system.  It is
591	important to rebuild third-party software after upgrading.  The value
592	of __FreeBSD_version has been bumped accordingly.
593
59420181006:
595	The legacy DRM modules and drivers have now been added to the loader's
596	module blacklist, in favor of loading them with kld_list in rc.conf(5).
597	The module blacklist may be overridden with the loader.conf(5)
598	'module_blacklist' variable, but loading them via rc.conf(5) is strongly
599	encouraged.
600
60120181002:
602	The cam(4) based nda(4) driver will be used over nvd(4) by default on
603	powerpc64. You may set 'options NVME_USE_NVD=1' in your kernel conf or
604	loader tunable 'hw.nvme.use_nvd=1' if you wish to use the existing
605	driver.  Make sure to edit /boot/etc/kboot.conf and fstab to use the
606	nda device name.
607
60820180913:
609	Reproducible build mode is now on by default, in preparation for
610	FreeBSD 12.0.  This eliminates build metadata such as the user,
611	host, and time from the kernel (and uname), unless the working tree
612	corresponds to a modified checkout from a version control system.
613	The previous behavior can be obtained by setting the /etc/src.conf
614	knob WITHOUT_REPRODUCIBLE_BUILD.
615
61620180826:
617	The Yarrow CSPRNG has been removed from the kernel as it has not been
618	supported by its designers since at least 2003. Fortuna has been the
619	default since FreeBSD-11.
620
62120180822:
622	devctl freeze/thaw have gone into the tree, the rc scripts have been
623	updated to use them and devmatch has been changed.  You should update
624	kernel, userland and rc scripts all at the same time.
625
62620180818:
627	The default interpreter has been switched from 4th to Lua.
628	LOADER_DEFAULT_INTERP, documented in build(7), will override the default
629	interpreter.  If you have custom FORTH code you will need to set
630	LOADER_DEFAULT_INTERP=4th (valid values are 4th, lua or simp) in
631	src.conf for the build.  This will create default hard links between
632	loader and loader_4th instead of loader and loader_lua, the new default.
633	If you are using UEFI it will create the proper hard link to loader.efi.
634
635	bhyve uses userboot.so. It remains 4th-only until some issues are solved
636	regarding coexisting with multiple versions of FreeBSD are resolved.
637
63820180815:
639	ls(1) now respects the COLORTERM environment variable used in other
640	systems and software to indicate that a colored terminal is both
641	supported and desired.  If ls(1) is suddenly emitting colors, they may
642	be disabled again by either removing the unwanted COLORTERM from your
643	environment, or using `ls --color=never`.  The ls(1) specific CLICOLOR
644	may not be observed in a future release.
645
64620180808:
647	The default pager for most commands has been changed to "less".  To
648	restore the old behavior, set PAGER="more" and MANPAGER="more -s" in
649	your environment.
650
65120180731:
652	The jedec_ts(4) driver has been removed. A superset of its functionality
653	is available in the jedec_dimm(4) driver, and the manpage for that
654	driver includes migration instructions. If you have "device jedec_ts"
655	in your kernel configuration file, it must be removed.
656
65720180730:
658	amd64/GENERIC now has EFI runtime services, EFIRT, enabled by default.
659	This should have no effect if the kernel is booted via BIOS/legacy boot.
660	EFIRT may be disabled via a loader tunable, efi.rt.disabled, if a system
661	has a buggy firmware that prevents a successful boot due to use of
662	runtime services.
663
66420180727:
665	Atmel AT91RM9200 and AT91SAM9, Cavium CNS 11xx and XScale
666	support has been removed from the tree. These ports were
667	obsolete and/or known to be broken for many years.
668
66920180723:
670	loader.efi has been augmented to participate more fully in the
671	UEFI boot manager protocol. loader.efi will now look at the
672	BootXXXX environment variable to determine if a specific kernel
673	or root partition was specified. XXXX is derived from BootCurrent.
674	efibootmgr(8) manages these standard UEFI variables.
675
67620180720:
677	zfsloader's functionality has now been folded into loader.
678	zfsloader is no longer necessary once you've updated your
679	boot blocks. For a transition period, we will install a
680	hardlink for zfsloader to loader to allow a smooth transition
681	until the boot blocks can be updated (hard link because old
682	zfs boot blocks don't understand symlinks).
683
68420180719:
685	ARM64 now have efifb support, if you want to have serial console
686	on your arm64 board when an screen is connected and the bootloader
687	setup a frame buffer for us to use, just add :
688	boot_serial=YES
689	boot_multicons=YES
690	in /boot/loader.conf
691	For Raspberry Pi 3 (RPI) users, this is needed even if you don't have
692	an screen connected as the firmware will setup a frame buffer are that
693	u-boot will expose as an EFI frame buffer.
694
69520180719:
696	New uid:gid added, ntpd:ntpd (123:123).  Be sure to run mergemaster
697	or take steps to update /etc/passwd before doing installworld on
698	existing systems.  Do not skip the "mergemaster -Fp" step before
699	installworld, as described in the update procedures near the bottom
700	of this document.  Also, rc.d/ntpd now starts ntpd(8) as user ntpd
701	if the new mac_ntpd(4) policy is available, unless ntpd_flags or
702	the ntp config file contain options that change file/dir locations.
703	When such options (e.g., "statsdir" or "crypto") are used, ntpd can
704	still be run as non-root by setting ntpd_user=ntpd in rc.conf, after
705	taking steps to ensure that all required files/dirs are accessible
706	by the ntpd user.
707
70820180717:
709	Big endian arm support has been removed.
710
71120180711:
712	The static environment setup in kernel configs is no longer mutually
713	exclusive with the loader(8) environment by default.  In order to
714	restore the previous default behavior of disabling the loader(8)
715	environment if a static environment is present, you must specify
716	loader_env.disabled=1 in the static environment.
717
71820180705:
719	The ABI of syscalls used by management tools like sockstat and
720	netstat has been broken to allow 32-bit binaries to work on
721	64-bit kernels without modification.  These programs will need
722	to match the kernel in order to function.  External programs may
723	require minor modifications to accommodate a change of type in
724	structures from pointers to 64-bit virtual addresses.
725
72620180702:
727	On i386 and amd64 atomics are now inlined. Out of tree modules using
728	atomics will need to be rebuilt.
729
73020180701:
731	The '%I' format in the kern.corefile sysctl limits the number of
732	core files that a process can generate to the number stored in the
733	debug.ncores sysctl. The '%I' format is replaced by the single digit
734	index. Previously, if all indexes were taken the kernel would overwrite
735	only a core file with the highest index in a filename.
736	Currently the system will create a new core file if there is a free
737	index or if all slots are taken it will overwrite the oldest one.
738
73920180630:
740	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
741	6.0.1.  Please see the 20141231 entry below for information about
742	prerequisites and upgrading, if you are not already using clang 3.5.0
743	or higher.
744
74520180628:
746	r335753 introduced a new quoting method. However, etc/devd/devmatch.conf
747	needed to be changed to work with it. This change was made with r335763
748	and requires a mergemaster / etcupdate / etc to update the installed
749	file.
750
75120180612:
752	r334930 changed the interface between the NFS modules, so they all
753	need to be rebuilt.  r335018 did a __FreeBSD_version bump for this.
754
75520180530:
756	As of r334391 lld is the default amd64 system linker; it is installed
757	as /usr/bin/ld.  Kernel build workarounds (see 20180510 entry) are no
758	longer necessary.
759
76020180530:
761	The kernel / userland interface for devinfo changed, so you'll
762	need a new kernel and userland as a pair for it to work (rebuilding
763	lib/libdevinfo is all that's required). devinfo and devmatch will
764	not work, but everything else will when there's a mismatch.
765
76620180523:
767	The on-disk format for hwpmc callchain records has changed to include
768	threadid corresponding to a given record. This changes the field offsets
769	and thus requires that libpmcstat be rebuilt before using a kernel
770	later than r334108.
771
77220180517:
773	The vxge(4) driver has been removed.  This driver was introduced into
774	HEAD one week before the Exar left the Ethernet market and is not
775	known to be used.  If you have device vxge in your kernel config file
776	it must be removed.
777
77820180510:
779	The amd64 kernel now requires a ld that supports ifunc to produce a
780	working kernel, either lld or a newer binutils. lld is built by default
781	on amd64, and the 'buildkernel' target uses it automatically. However,
782	it is not the default linker, so building the kernel the traditional
783	way requires LD=ld.lld on the command line (or LD=/usr/local/bin/ld for
784	binutils port/package). lld will soon be default, and this requirement
785	will go away.
786
787	NOTE: As of r334391 lld is the default system linker on amd64, and no
788	workaround is necessary.
789
79020180508:
791	The nxge(4) driver has been removed.  This driver was for PCI-X 10g
792	cards made by s2io/Neterion.  The company was acquired by Exar and
793	no longer sells or supports Ethernet products.  If you have device
794	nxge in your kernel config file it must be removed.
795
79620180504:
797	The tz database (tzdb) has been updated to 2018e.  This version more
798	correctly models time stamps in time zones with negative DST such as
799	Europe/Dublin (from 1971 on), Europe/Prague (1946/7), and
800	Africa/Windhoek (1994/2017).  This does not affect the UT offsets, only
801	time zone abbreviations and the tm_isdst flag.
802
80320180502:
804	The ixgb(4) driver has been removed.  This driver was for an early and
805	uncommon legacy PCI 10GbE for a single ASIC, Intel 82597EX. Intel
806	quickly shifted to the long lived ixgbe family.  If you have device
807	ixgb in your kernel config file it must be removed.
808
80920180501:
810	The lmc(4) driver has been removed.  This was a WAN interface
811	card that was already reportedly rare in 2003, and had an ambiguous
812	license.  If you have device lmc in your kernel config file it must
813	be removed.
814
81520180413:
816	Support for Arcnet networks has been removed.  If you have device
817	arcnet or device cm in your kernel config file they must be
818	removed.
819
82020180411:
821	Support for FDDI networks has been removed.  If you have device
822	fddi or device fpa in your kernel config file they must be
823	removed.
824
82520180406:
826	In addition to supporting RFC 3164 formatted messages, the
827	syslogd(8) service is now capable of parsing RFC 5424 formatted
828	log messages. The main benefit of using RFC 5424 is that clients
829	may now send log messages with timestamps containing year numbers,
830	microseconds and time zone offsets.
831
832	Similarly, the syslog(3) C library function has been altered to
833	send RFC 5424 formatted messages to the local system logging
834	daemon. On systems using syslogd(8), this change should have no
835	negative impact, as long as syslogd(8) and the C library are
836	updated at the same time. On systems using a different system
837	logging daemon, it may be necessary to make configuration
838	adjustments, depending on the software used.
839
840	When using syslog-ng, add the 'syslog-protocol' flag to local
841	input sources to enable parsing of RFC 5424 formatted messages:
842
843		source src {
844			unix-dgram("/var/run/log" flags(syslog-protocol));
845		}
846
847	When using rsyslog, disable the 'SysSock.UseSpecialParser' option
848	of the 'imuxsock' module to let messages be processed by the
849	regular RFC 3164/5424 parsing pipeline:
850
851		module(load="imuxsock" SysSock.UseSpecialParser="off")
852
853	Do note that these changes only affect communication between local
854	applications and syslogd(8). The format that syslogd(8) uses to
855	store messages on disk or forward messages to other systems
856	remains unchanged. syslogd(8) still uses RFC 3164 for these
857	purposes. Options to customize this behaviour will be added in the
858	future. Utilities that process log files stored in /var/log are
859	thus expected to continue to function as before.
860
861	__FreeBSD_version has been incremented to 1200061 to denote this
862	change.
863
86420180328:
865	Support for token ring networks has been removed. If you
866	have "device token" in your kernel config you should remove
867	it. No device drivers supported token ring.
868
86920180323:
870	makefs was modified to be able to tag ISO9660 El Torito boot catalog
871	entries as EFI instead of overloading the i386 tag as done previously.
872	The amd64 mkisoimages.sh script used to build amd64 ISO images for
873	release was updated to use this. This may mean that makefs must be
874	updated before "make cdrom" can be run in the release directory. This
875	should be as simple as:
876
877		$ cd $SRCDIR/usr.sbin/makefs
878		$ make depend all install
879
88020180212:
881	FreeBSD boot loader enhanced with Lua scripting. It's purely opt-in for
882	now by building WITH_LOADER_LUA and WITHOUT_FORTH in /etc/src.conf.
883	Co-existence for the transition period will come shortly. Booting is a
884	complex environment and test coverage for Lua-enabled loaders has been
885	thin, so it would be prudent to assume it might not work and make
886	provisions for backup boot methods.
887
88820180211:
889	devmatch functionality has been turned on in devd. It will automatically
890	load drivers for unattached devices. This may cause unexpected drivers
891	to be loaded. Please report any problems to current@ and
892	[email protected].
893
89420180114:
895	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
896	6.0.0.  Please see the 20141231 entry below for information about
897	prerequisites and upgrading, if you are not already using clang 3.5.0
898	or higher.
899
90020180110:
901	LLVM's lld linker is now used as the FreeBSD/amd64 bootstrap linker.
902	This means it is used to link the kernel and userland libraries and
903	executables, but is not yet installed as /usr/bin/ld by default.
904
905	To revert to ld.bfd as the bootstrap linker, in /etc/src.conf set
906	WITHOUT_LLD_BOOTSTRAP=yes
907
90820180110:
909	On i386, pmtimer has been removed. Its functionality has been folded
910	into apm. It was a no-op on ACPI in current for a while now (but was
911	still needed on i386 in FreeBSD 11 and earlier). Users may need to
912	remove it from kernel config files.
913
91420180104:
915	The use of RSS hash from the network card aka flowid has been
916	disabled by default for lagg(4) as it's currently incompatible with
917	the lacp and loadbalance protocols.
918
919	This can be re-enabled by setting the following in loader.conf:
920	net.link.lagg.default_use_flowid="1"
921
92220180102:
923	The SW_WATCHDOG option is no longer necessary to enable the
924	hardclock-based software watchdog if no hardware watchdog is
925	configured. As before, SW_WATCHDOG will cause the software
926	watchdog to be enabled even if a hardware watchdog is configured.
927
92820171215:
929	r326887 fixes the issue described in the 20171214 UPDATING entry.
930	r326888 flips the switch back to building GELI support always.
931
93220171214:
933	r362593 broke ZFS + GELI support for reasons unknown. However,
934	it also broke ZFS support generally, so GELI has been turned off
935	by default as the lesser evil in r326857. If you boot off ZFS and/or
936	GELI, it might not be a good time to update.
937
93820171125:
939	PowerPC users must update loader(8) by rebuilding world before
940	installing a new kernel, as the protocol connecting them has
941	changed. Without the update, loader metadata will not be passed
942	successfully to the kernel and users will have to enter their
943	root partition at the kernel mountroot prompt to continue booting.
944	Newer versions of loader can boot old kernels without issue.
945
94620171110:
947	The LOADER_FIREWIRE_SUPPORT build variable as been renamed to
948	WITH/OUT_LOADER_FIREWIRE. LOADER_{NO_,}GELI_SUPPORT has been renamed
949	to WITH/OUT_LOADER_GELI.
950
95120171106:
952	The naive and non-compliant support of posix_fallocate(2) in ZFS
953	has been removed as of r325320.  The system call now returns EINVAL
954	when used on a ZFS file.  Although the new behavior complies with the
955	standard, some consumers are not prepared to cope with it.
956	One known victim is lld prior to r325420.
957
95820171102:
959	Building in a FreeBSD src checkout will automatically create object
960	directories now rather than store files in the current directory if
961	'make obj' was not ran.  Calling 'make obj' is no longer necessary.
962	This feature can be disabled by setting WITHOUT_AUTO_OBJ=yes in
963	/etc/src-env.conf (not /etc/src.conf), or passing the option in the
964	environment.
965
96620171101:
967	The default MAKEOBJDIR has changed from /usr/obj/<srcdir> for native
968	builds, and /usr/obj/<arch>/<srcdir> for cross-builds, to a unified
969	/usr/obj/<srcdir>/<arch>.  This behavior can be changed to the old
970	format by setting WITHOUT_UNIFIED_OBJDIR=yes in /etc/src-env.conf,
971	the environment, or with -DWITHOUT_UNIFIED_OBJDIR when building.
972	The UNIFIED_OBJDIR option is a transitional feature that will be
973	removed for 12.0 release; please migrate to the new format for any
974	tools by looking up the OBJDIR used by 'make -V .OBJDIR' means rather
975	than hardcoding paths.
976
97720171028:
978	The native-xtools target no longer installs the files by default to the
979	OBJDIR.  Use the native-xtools-install target with a DESTDIR to install
980	to ${DESTDIR}/${NXTP} where NXTP defaults to /nxb-bin.
981
98220171021:
983	As part of the boot loader infrastructure cleanup, LOADER_*_SUPPORT
984	options are changing from controlling the build if defined / undefined
985	to controlling the build with explicit 'yes' or 'no' values. They will
986	shift to WITH/WITHOUT options to match other options in the system.
987
98820171010:
989	libstand has turned into a private library for sys/boot use only.
990	It is no longer supported as a public interface outside of sys/boot.
991
99220171005:
993	The arm port has split armv6 into armv6 and armv7. armv7 is now
994	a valid TARGET_ARCH/MACHINE_ARCH setting. If you have an armv7 system
995	and are running a kernel from before r324363, you will need to add
996	MACHINE_ARCH=armv7 to 'make buildworld' to do a native build.
997
99820171003:
999	When building multiple kernels using KERNCONF, non-existent KERNCONF
1000	files will produce an error and buildkernel will fail. Previously
1001	missing KERNCONF files silently failed giving no indication as to
1002	why, only to subsequently discover during installkernel that the
1003	desired kernel was never built in the first place.
1004
100520170912:
1006	The default serial number format for CTL LUNs has changed.  This will
1007	affect users who use /dev/diskid/* device nodes, or whose FibreChannel
1008	or iSCSI clients care about their LUNs' serial numbers.  Users who
1009	require serial number stability should hardcode serial numbers in
1010	/etc/ctl.conf .
1011
101220170912:
1013	For 32-bit arm compiled for hard-float support, soft-floating point
1014	binaries now always get their shared libraries from
1015	LD_SOFT_LIBRARY_PATH (in the past, this was only used if
1016	/usr/libsoft also existed). Only users with a hard-float ld.so, but
1017	soft-float everything else should be affected.
1018
101920170826:
1020	The geli password typed at boot is now hidden.  To restore the previous
1021	behavior, see geli(8) for configuration options.
1022
102320170825:
1024	Move PMTUD blackhole counters to TCPSTATS and remove them from bare
1025	sysctl values.  Minor nit, but requires a rebuild of both world/kernel
1026	to complete.
1027
102820170814:
1029	"make check" behavior (made in ^/head@r295380) has been changed to
1030	execute from a limited sandbox, as opposed to executing from
1031	${TESTSDIR}.
1032
1033	Behavioral changes:
1034	- The "beforecheck" and "aftercheck" targets are now specified.
1035	- ${CHECKDIR} (added in commit noted above) has been removed.
1036	- Legacy behavior can be enabled by setting
1037	  WITHOUT_MAKE_CHECK_USE_SANDBOX in src.conf(5) or the environment.
1038
1039	If the limited sandbox mode is enabled, "make check" will execute
1040	"make distribution", then install, execute the tests, and clean up the
1041	sandbox if successful.
1042
1043	The "make distribution" and "make install" targets are typically run as
1044	root to set appropriate permissions and ownership at installation time.
1045	The end-user should set "WITH_INSTALL_AS_USER" in src.conf(5) or the
1046	environment if executing "make check" with limited sandbox mode using
1047	an unprivileged user.
1048
104920170808:
1050	Since the switch to GPT disk labels, fsck for UFS/FFS has been
1051	unable to automatically find alternate superblocks. As of r322297,
1052	the information needed to find alternate superblocks has been
1053	moved to the end of the area reserved for the boot block.
1054	Filesystems created with a newfs of this vintage or later
1055	will create the recovery information. If you have a filesystem
1056	created prior to this change and wish to have a recovery block
1057	created for your filesystem, you can do so by running fsck in
1058	foreground mode (i.e., do not use the -p or -y options). As it
1059	starts, fsck will ask ``SAVE DATA TO FIND ALTERNATE SUPERBLOCKS''
1060	to which you should answer yes.
1061
106220170728:
1063	As of r321665, an NFSv4 server configuration that services
1064	Kerberos mounts or clients that do not support the uid/gid in
1065	owner/owner_group string capability, must explicitly enable
1066	the nfsuserd daemon by adding nfsuserd_enable="YES" to the
1067	machine's /etc/rc.conf file.
1068
106920170722:
1070	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 5.0.0.
1071	Please see the 20141231 entry below for information about prerequisites
1072	and upgrading, if you are not already using clang 3.5.0 or higher.
1073
107420170701:
1075	WITHOUT_RCMDS is now the default. Set WITH_RCMDS if you need the
1076	r-commands (rlogin, rsh, etc.) to be built with the base system.
1077
107820170625:
1079	The FreeBSD/powerpc platform now uses a 64-bit type for time_t.  This is
1080	a very major ABI incompatible change, so users of FreeBSD/powerpc must
1081	be careful when performing source upgrades.  It is best to run
1082	'make installworld' from an alternate root system, either a live
1083	CD/memory stick, or a temporary root partition.  Additionally, all ports
1084	must be recompiled.  powerpc64 is largely unaffected, except in the case
1085	of 32-bit compatibility.  All 32-bit binaries will be affected.
1086
108720170623:
1088	Forward compatibility for the "ino64" project have been committed. This
1089	will allow most new binaries to run on older kernels in a limited
1090	fashion.  This prevents many of the common foot-shooting actions in the
1091	upgrade as well as the limited ability to roll back the kernel across
1092	the ino64 upgrade. Complicated use cases may not work properly, though
1093	enough simpler ones work to allow recovery in most situations.
1094
109520170620:
1096	Switch back to the BSDL dtc (Device Tree Compiler). Set WITH_GPL_DTC
1097	if you require the GPL compiler.
1098
109920170618:
1100	The internal ABI used for communication between the NFS kernel modules
1101	was changed by r320085, so __FreeBSD_version was bumped to
1102	ensure all the NFS related modules are updated together.
1103
110420170617:
1105	The ABI of struct event was changed by extending the data
1106	member to 64bit and adding ext fields.  For upgrade, same
1107	precautions as for the entry 20170523 "ino64" must be
1108	followed.
1109
111020170531:
1111	The GNU roff toolchain has been removed from base. To render manpages
1112	which are not supported by mandoc(1), man(1) can fallback on GNU roff
1113	from ports (and recommends to install it).
1114	To render roff(7) documents, consider using GNU roff from ports or the
1115	heirloom doctools roff toolchain from ports via pkg install groff or
1116	via pkg install heirloom-doctools.
1117
111820170524:
1119	The ath(4) and ath_hal(4) modules now build piecemeal to allow for
1120	smaller runtime footprint builds.  This is useful for embedded systems
1121	which only require one chipset support.
1122
1123	If you load it as a module, make sure this is in /boot/loader.conf:
1124
1125	if_ath_load="YES"
1126
1127	This will load the HAL, all chip/RF backends and if_ath_pci.
1128	If you have if_ath_pci in /boot/loader.conf, ensure it is after
1129	if_ath or it will not load any HAL chipset support.
1130
1131	If you want to selectively load things (eg on ye cheape ARM/MIPS
1132	platforms where RAM is at a premium) you should:
1133
1134	* load ath_hal
1135	* load the chip modules in question
1136	* load ath_rate, ath_dfs
1137	* load ath_main
1138	* load if_ath_pci and/or if_ath_ahb depending upon your particular
1139	  bus bind type - this is where probe/attach is done.
1140
1141	For further comments/feedback, poke adrian@ .
1142
114320170523:
1144	The "ino64" 64-bit inode project has been committed, which extends
1145	a number of types to 64 bits.  Upgrading in place requires care and
1146	adherence to the documented upgrade procedure.
1147
1148	If using a custom kernel configuration ensure that the
1149	COMPAT_FREEBSD11 option is included (as during the upgrade the
1150	system will be running the ino64 kernel with the existing world).
1151
1152	For the safest in-place upgrade begin by removing previous build
1153	artifacts via "rm -rf /usr/obj/*".  Then, carefully follow the full
1154	procedure documented below under the heading "To rebuild everything and
1155	install it on the current system."  Specifically, a reboot is required
1156	after installing the new kernel before installing world. While an
1157	installworld normally works by accident from multiuser after rebooting
1158	the proper kernel, there are many cases where this will fail across this
1159	upgrade and installworld from single user is required.
1160
116120170424:
1162	The NATM framework including the en(4), fatm(4), hatm(4), and
1163	patm(4) devices has been removed.  Consumers should plan a
1164	migration before the end-of-life date for FreeBSD 11.
1165
116620170420:
1167	GNU diff has been replaced by a BSD licensed diff. Some features of GNU
1168	diff has not been implemented, if those are needed a newer version of
1169	GNU diff is available via the diffutils package under the gdiff name.
1170
117120170413:
1172	As of r316810 for ipfilter, keep frags is no longer assumed when
1173	keep state is specified in a rule. r316810 aligns ipfilter with
1174	documentation in man pages separating keep frags from keep state.
1175	This allows keep state to be specified without forcing keep frags
1176	and allows keep frags to be specified independently of keep state.
1177	To maintain previous behaviour, also specify keep frags with
1178	keep state (as documented in ipf.conf.5).
1179
118020170407:
1181	arm64 builds now use the base system LLD 4.0.0 linker by default,
1182	instead of requiring that the aarch64-binutils port or package be
1183	installed. To continue using aarch64-binutils, set
1184	CROSS_BINUTILS_PREFIX=/usr/local/aarch64-freebsd/bin .
1185
118620170405:
1187	The UDP optimization in entry 20160818 that added the sysctl
1188	net.inet.udp.require_l2_bcast has been reverted.  L2 broadcast
1189	packets will no longer be treated as L3 broadcast packets.
1190
119120170331:
1192	Binds and sends to the loopback addresses, IPv6 and IPv4, will now
1193	use any explicitly assigned loopback address available in the jail
1194	instead of using the first assigned address of the jail.
1195
119620170329:
1197	The ctl.ko module no longer implements the iSCSI target frontend:
1198	cfiscsi.ko does instead.
1199
1200	If building cfiscsi.ko as a kernel module, the module can be loaded
1201	via one of the following methods:
1202	- `cfiscsi_load="YES"` in loader.conf(5).
1203	- Add `cfiscsi` to `$kld_list` in rc.conf(5).
1204	- ctladm(8)/ctld(8), when compiled with iSCSI support
1205	  (`WITH_ISCSI=yes` in src.conf(5))
1206
1207	Please see cfiscsi(4) for more details.
1208
120920170316:
1210	The mmcsd.ko module now additionally depends on geom_flashmap.ko.
1211	Also, mmc.ko and mmcsd.ko need to be a matching pair built from the
1212	same source (previously, the dependency of mmcsd.ko on mmc.ko was
1213	missing, but mmcsd.ko now will refuse to load if it is incompatible
1214	with mmc.ko).
1215
121620170315:
1217	The syntax of ipfw(8) named states was changed to avoid ambiguity.
1218	If you have used named states in the firewall rules, you need to modify
1219	them after installworld and before rebooting. Now named states must
1220	be prefixed with colon.
1221
122220170311:
1223	The old drm (sys/dev/drm/) drivers for i915 and radeon have been
1224	removed as the userland we provide cannot use them. The KMS version
1225	(sys/dev/drm2) supports the same hardware.
1226
122720170302:
1228	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 4.0.0.
1229	Please see the 20141231 entry below for information about prerequisites
1230	and upgrading, if you are not already using clang 3.5.0 or higher.
1231
123220170221:
1233	The code that provides support for ZFS .zfs/ directory functionality
1234	has been reimplemented.  It's not possible now to create a snapshot
1235	by mkdir under .zfs/snapshot/.  That should be the only user visible
1236	change.
1237
123820170216:
1239	EISA bus support has been removed. The WITH_EISA option is no longer
1240	valid.
1241
124220170215:
1243	MCA bus support has been removed.
1244
124520170127:
1246	The WITH_LLD_AS_LD / WITHOUT_LLD_AS_LD build knobs have been renamed
1247	WITH_LLD_IS_LD / WITHOUT_LLD_IS_LD, for consistency with CLANG_IS_CC.
1248
124920170112:
1250	The EM_MULTIQUEUE kernel configuration option is deprecated now that
1251	the em(4) driver conforms to iflib specifications.
1252
125320170109:
1254	The igb(4), em(4) and lem(4) ethernet drivers are now implemented via
1255	IFLIB.  If you have a custom kernel configuration that excludes em(4)
1256	but you use igb(4), you need to re-add em(4) to your custom
1257	configuration.
1258
125920161217:
1260	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.9.1.
1261	Please see the 20141231 entry below for information about prerequisites
1262	and upgrading, if you are not already using clang 3.5.0 or higher.
1263
126420161124:
1265	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.9.0.
1266	Please see the 20141231 entry below for information about prerequisites
1267	and upgrading, if you are not already using clang 3.5.0 or higher.
1268
126920161119:
1270	The layout of the pmap structure has changed for powerpc to put the pmap
1271	statistics at the front for all CPU variations.  libkvm(3) and all tools
1272	that link against it need to be recompiled.
1273
127420161030:
1275	isl(4) and cyapa(4) drivers now require a new driver,
1276	chromebook_platform(4), to work properly on Chromebook-class hardware.
1277	On other types of hardware the drivers may need to be configured using
1278	device hints.  Please see the corresponding manual pages for details.
1279
128020161017:
1281	The urtwn(4) driver was merged into rtwn(4) and now consists of
1282	rtwn(4) main module + rtwn_usb(4) and rtwn_pci(4) bus-specific
1283	parts.
1284	Also, firmware for RTL8188CE was renamed due to possible name
1285	conflict (rtwnrtl8192cU(B) -> rtwnrtl8192cE(B))
1286
128720161015:
1288	GNU rcs has been removed from base.  It is available as packages:
1289	- rcs: Latest GPLv3 GNU rcs version.
1290	- rcs57: Copy of the latest version of GNU rcs (GPLv2) before it was
1291	removed from base.
1292
129320161008:
1294	Use of the cc_cdg, cc_chd, cc_hd, or cc_vegas congestion control
1295	modules now requires that the kernel configuration contain the
1296	TCP_HHOOK option. (This option is included in the GENERIC kernel.)
1297
129820161003:
1299	The WITHOUT_ELFCOPY_AS_OBJCOPY src.conf(5) knob has been retired.
1300	ELF Tool Chain's elfcopy is always installed as /usr/bin/objcopy.
1301
130220160924:
1303	Relocatable object files with the extension of .So have been renamed
1304	to use an extension of .pico instead.  The purpose of this change is
1305	to avoid a name clash with shared libraries on case-insensitive file
1306	systems.  On those file systems, foo.So is the same file as foo.so.
1307
130820160918:
1309	GNU rcs has been turned off by default.  It can (temporarily) be built
1310	again by adding WITH_RCS knob in src.conf.
1311	Otherwise, GNU rcs is available from packages:
1312	- rcs: Latest GPLv3 GNU rcs version.
1313	- rcs57: Copy of the latest version of GNU rcs (GPLv2) from base.
1314
131520160918:
1316	The backup_uses_rcs functionality has been removed from rc.subr.
1317
131820160908:
1319	The queue(3) debugging macro, QUEUE_MACRO_DEBUG, has been split into
1320	two separate components, QUEUE_MACRO_DEBUG_TRACE and
1321	QUEUE_MACRO_DEBUG_TRASH.  Define both for the original
1322	QUEUE_MACRO_DEBUG behavior.
1323
132420160824:
1325	r304787 changed some ioctl interfaces between the iSCSI userspace
1326	programs and the kernel.  ctladm, ctld, iscsictl, and iscsid must be
1327	rebuilt to work with new kernels.  __FreeBSD_version has been bumped
1328	to 1200005.
1329
133020160818:
1331	The UDP receive code has been updated to only treat incoming UDP
1332	packets that were addressed to an L2 broadcast address as L3
1333	broadcast packets.  It is not expected that this will affect any
1334	standards-conforming UDP application.  The new behaviour can be
1335	disabled by setting the sysctl net.inet.udp.require_l2_bcast to
1336	0.
1337
133820160818:
1339	Remove the openbsd_poll system call.
1340	__FreeBSD_version has been bumped because of this.
1341
134220160708:
1343	The stable/11 branch has been created from head@r302406.
1344
134520160622:
1346	The libc stub for the pipe(2) system call has been replaced with
1347	a wrapper that calls the pipe2(2) system call and the pipe(2)
1348	system call is now only implemented by the kernels that include
1349	"options COMPAT_FREEBSD10" in their config file (this is the
1350	default).  Users should ensure that this option is enabled in
1351	their kernel or upgrade userspace to r302092 before upgrading their
1352	kernel.
1353
135420160527:
1355	CAM will now strip leading spaces from SCSI disks' serial numbers.
1356	This will affect users who create UFS filesystems on SCSI disks using
1357	those disk's diskid device nodes.  For example, if /etc/fstab
1358	previously contained a line like
1359	"/dev/diskid/DISK-%20%20%20%20%20%20%20ABCDEFG0123456", you should
1360	change it to "/dev/diskid/DISK-ABCDEFG0123456".  Users of geom
1361	transforms like gmirror may also be affected.  ZFS users should
1362	generally be fine.
1363
136420160523:
1365	The bitstring(3) API has been updated with new functionality and
1366	improved performance.  But it is binary-incompatible with the old API.
1367	Objects built with the new headers may not be linked against objects
1368	built with the old headers.
1369
137020160520:
1371	The brk and sbrk functions have been removed from libc on arm64.
1372	Binutils from ports has been updated to not link to these
1373	functions and should be updated to the latest version before
1374	installing a new libc.
1375
137620160517:
1377	The armv6 port now defaults to hard float ABI. Limited support
1378	for running both hardfloat and soft float on the same system
1379	is available using the libraries installed with -DWITH_LIBSOFT.
1380	This has only been tested as an upgrade path for installworld
1381	and packages may fail or need manual intervention to run. New
1382	packages will be needed.
1383
1384	To update an existing self-hosted armv6hf system, you must add
1385	TARGET_ARCH=armv6 on the make command line for both the build
1386	and the install steps.
1387
138820160510:
1389	Kernel modules compiled outside of a kernel build now default to
1390	installing to /boot/modules instead of /boot/kernel.  Many kernel
1391	modules built this way (such as those in ports) already overrode
1392	KMODDIR explicitly to install into /boot/modules.  However,
1393	manually building and installing a module from /sys/modules will
1394	now install to /boot/modules instead of /boot/kernel.
1395
139620160414:
1397	The CAM I/O scheduler has been committed to the kernel. There should be
1398	no user visible impact. This does enable NCQ Trim on ada SSDs. While the
1399	list of known rogues that claim support for this but actually corrupt
1400	data is believed to be complete, be on the lookout for data
1401	corruption. The known rogue list is believed to be complete:
1402
1403		o Crucial MX100, M550 drives with MU01 firmware.
1404		o Micron M510 and M550 drives with MU01 firmware.
1405		o Micron M500 prior to MU07 firmware
1406		o Samsung 830, 840, and 850 all firmwares
1407		o FCCT M500 all firmwares
1408
1409	Crucial has firmware http://www.crucial.com/usa/en/support-ssd-firmware
1410	with working NCQ TRIM. For Micron branded drives, see your sales rep for
1411	updated firmware. Black listed drives will work correctly because these
1412	drives work correctly so long as no NCQ TRIMs are sent to them. Given
1413	this list is the same as found in Linux, it's believed there are no
1414	other rogues in the market place. All other models from the above
1415	vendors work.
1416
1417	To be safe, if you are at all concerned, you can quirk each of your
1418	drives to prevent NCQ from being sent by setting:
1419		kern.cam.ada.X.quirks="0x2"
1420	in loader.conf. If the drive requires the 4k sector quirk, set the
1421	quirks entry to 0x3.
1422
142320160330:
1424	The FAST_DEPEND build option has been removed and its functionality is
1425	now the one true way.  The old mkdep(1) style of 'make depend' has
1426	been removed.  See 20160311 for further details.
1427
142820160317:
1429	Resource range types have grown from unsigned long to uintmax_t.  All
1430	drivers, and anything using libdevinfo, need to be recompiled.
1431
143220160311:
1433	WITH_FAST_DEPEND is now enabled by default for in-tree and out-of-tree
1434	builds.  It no longer runs mkdep(1) during 'make depend', and the
1435	'make depend' stage can safely be skipped now as it is auto ran
1436	when building 'make all' and will generate all SRCS and DPSRCS before
1437	building anything else.  Dependencies are gathered at compile time with
1438	-MF flags kept in separate .depend files per object file.  Users should
1439	run 'make cleandepend' once if using -DNO_CLEAN to clean out older
1440	stale .depend files.
1441
144220160306:
1443	On amd64, clang 3.8.0 can now insert sections of type AMD64_UNWIND into
1444	kernel modules.  Therefore, if you load any kernel modules at boot time,
1445	please install the boot loaders after you install the kernel, but before
1446	rebooting, e.g.:
1447
1448	make buildworld
1449	make buildkernel KERNCONF=YOUR_KERNEL_HERE
1450	make installkernel KERNCONF=YOUR_KERNEL_HERE
1451	make -C sys/boot install
1452	<reboot in single user>
1453
1454	Then follow the usual steps, described in the General Notes section,
1455	below.
1456
145720160305:
1458	Clang, llvm, lldb and compiler-rt have been upgraded to 3.8.0.  Please
1459	see the 20141231 entry below for information about prerequisites and
1460	upgrading, if you are not already using clang 3.5.0 or higher.
1461
146220160301:
1463	The AIO subsystem is now a standard part of the kernel.  The
1464	VFS_AIO kernel option and aio.ko kernel module have been removed.
1465	Due to stability concerns, asynchronous I/O requests are only
1466	permitted on sockets and raw disks by default.  To enable
1467	asynchronous I/O requests on all file types, set the
1468	vfs.aio.enable_unsafe sysctl to a non-zero value.
1469
147020160226:
1471	The ELF object manipulation tool objcopy is now provided by the
1472	ELF Tool Chain project rather than by GNU binutils. It should be a
1473	drop-in replacement, with the addition of arm64 support. The
1474	(temporary) src.conf knob WITHOUT_ELFCOPY_AS_OBJCOPY knob may be set
1475	to obtain the GNU version if necessary.
1476
147720160129:
1478	Building ZFS pools on top of zvols is prohibited by default.  That
1479	feature has never worked safely; it's always been prone to deadlocks.
1480	Using a zvol as the backing store for a VM guest's virtual disk will
1481	still work, even if the guest is using ZFS.  Legacy behavior can be
1482	restored by setting vfs.zfs.vol.recursive=1.
1483
148420160119:
1485	The NONE and HPN patches has been removed from OpenSSH.  They are
1486	still available in the security/openssh-portable port.
1487
148820160113:
1489	With the addition of ypldap(8), a new _ypldap user is now required
1490	during installworld. "mergemaster -p" can be used to add the user
1491	prior to installworld, as documented in the handbook.
1492
149320151216:
1494	The tftp loader (pxeboot) now uses the option root-path directive. As a
1495	consequence it no longer looks for a pxeboot.4th file on the tftp
1496	server. Instead it uses the regular /boot infrastructure as with the
1497	other loaders.
1498
149920151211:
1500	The code to start recording plug and play data into the modules has
1501	been committed. While the old tools will properly build a new kernel,
1502	a number of warnings about "unknown metadata record 4" will be produced
1503	for an older kldxref. To avoid such warnings, make sure to rebuild
1504	the kernel toolchain (or world). Make sure that you have r292078 or
1505	later when trying to build 292077 or later before rebuilding.
1506
150720151207:
1508	Debug data files are now built by default with 'make buildworld' and
1509	installed with 'make installworld'. This facilitates debugging but
1510	requires more disk space both during the build and for the installed
1511	world. Debug files may be disabled by setting WITHOUT_DEBUG_FILES=yes
1512	in src.conf(5).
1513
151420151130:
1515	r291527 changed the internal interface between the nfsd.ko and
1516	nfscommon.ko modules. As such, they must both be upgraded to-gether.
1517	__FreeBSD_version has been bumped because of this.
1518
151920151108:
1520	Add support for unicode collation strings leads to a change of
1521	order of files listed by ls(1) for example. To get back to the old
1522	behaviour, set LC_COLLATE environment variable to "C".
1523
1524	Databases administrators will need to reindex their databases given
1525	collation results will be different.
1526
1527	Due to a bug in install(1) it is recommended to remove the ancient
1528	locales before running make installworld.
1529
1530	rm -rf /usr/share/locale/*
1531
153220151030:
1533	The OpenSSL has been upgraded to 1.0.2d.  Any binaries requiring
1534	libcrypto.so.7 or libssl.so.7 must be recompiled.
1535
153620151020:
1537	Qlogic 24xx/25xx firmware images were updated from 5.5.0 to 7.3.0.
1538	Kernel modules isp_2400_multi and isp_2500_multi were removed and
1539	should be replaced with isp_2400 and isp_2500 modules respectively.
1540
154120151017:
1542	The build previously allowed using 'make -n' to not recurse into
1543	sub-directories while showing what commands would be executed, and
1544	'make -n -n' to recursively show commands.  Now 'make -n' will recurse
1545	and 'make -N' will not.
1546
154720151012:
1548	If you specify SENDMAIL_MC or SENDMAIL_CF in make.conf, mergemaster
1549	and etcupdate will now use this file. A custom sendmail.cf is now
1550	updated via this mechanism rather than via installworld.  If you had
1551	excluded sendmail.cf in mergemaster.rc or etcupdate.conf, you may
1552	want to remove the exclusion or change it to "always install".
1553	/etc/mail/sendmail.cf is now managed the same way regardless of
1554	whether SENDMAIL_MC/SENDMAIL_CF is used.  If you are not using
1555	SENDMAIL_MC/SENDMAIL_CF there should be no change in behavior.
1556
155720151011:
1558	Compatibility shims for legacy ATA device names have been removed.
1559	It includes ATA_STATIC_ID kernel option, kern.cam.ada.legacy_aliases
1560	and kern.geom.raid.legacy_aliases loader tunables, kern.devalias.*
1561	environment variables, /dev/ad* and /dev/ar* symbolic links.
1562
156320151006:
1564	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.7.0.
1565	Please see the 20141231 entry below for information about prerequisites
1566	and upgrading, if you are not already using clang 3.5.0 or higher.
1567
156820150924:
1569	Kernel debug files have been moved to /usr/lib/debug/boot/kernel/,
1570	and renamed from .symbols to .debug. This reduces the size requirements
1571	on the boot partition or file system and provides consistency with
1572	userland debug files.
1573
1574	When using the supported kernel installation method the
1575	/usr/lib/debug/boot/kernel directory will be renamed (to kernel.old)
1576	as is done with /boot/kernel.
1577
1578	Developers wishing to maintain the historical behavior of installing
1579	debug files in /boot/kernel/ can set KERN_DEBUGDIR="" in src.conf(5).
1580
158120150827:
1582	The wireless drivers had undergone changes that remove the 'parent
1583	interface' from the ifconfig -l output. The rc.d network scripts
1584	used to check presence of a parent interface in the list, so old
1585	scripts would fail to start wireless networking. Thus, etcupdate(3)
1586	or mergemaster(8) run is required after kernel update, to update your
1587	rc.d scripts in /etc.
1588
158920150827:
1590	pf no longer supports 'scrub fragment crop' or 'scrub fragment drop-ovl'
1591	These configurations are now automatically interpreted as
1592	'scrub fragment reassemble'.
1593
159420150817:
1595	Kernel-loadable modules for the random(4) device are back. To use
1596	them, the kernel must have
1597
1598	device	random
1599	options	RANDOM_LOADABLE
1600
1601	kldload(8) can then be used to load random_fortuna.ko
1602	or random_yarrow.ko. Please note that due to the indirect
1603	function calls that the loadable modules need to provide,
1604	the build-in variants will be slightly more efficient.
1605
1606	The random(4) kernel option RANDOM_DUMMY has been retired due to
1607	unpopularity. It was not all that useful anyway.
1608
160920150813:
1610	The WITHOUT_ELFTOOLCHAIN_TOOLS src.conf(5) knob has been retired.
1611	Control over building the ELF Tool Chain tools is now provided by
1612	the WITHOUT_TOOLCHAIN knob.
1613
161420150810:
1615	The polarity of Pulse Per Second (PPS) capture events with the
1616	uart(4) driver has been corrected.  Prior to this change the PPS
1617	"assert" event corresponded to the trailing edge of a positive PPS
1618	pulse and the "clear" event was the leading edge of the next pulse.
1619
1620	As the width of a PPS pulse in a typical GPS receiver is on the
1621	order of 1 millisecond, most users will not notice any significant
1622	difference with this change.
1623
1624	Anyone who has compensated for the historical polarity reversal by
1625	configuring a negative offset equal to the pulse width will need to
1626	remove that workaround.
1627
162820150809:
1629	The default group assigned to /dev/dri entries has been changed
1630	from 'wheel' to 'video' with the id of '44'. If you want to have
1631	access to the dri devices please add yourself to the video group
1632	with:
1633
1634	# pw groupmod video -m $USER
1635
163620150806:
1637	The menu.rc and loader.rc files will now be replaced during
1638	upgrades. Please migrate local changes to menu.rc.local and
1639	loader.rc.local instead.
1640
164120150805:
1642	GNU Binutils versions of addr2line, c++filt, nm, readelf, size,
1643	strings and strip have been removed. The src.conf(5) knob
1644	WITHOUT_ELFTOOLCHAIN_TOOLS no longer provides the binutils tools.
1645
164620150728:
1647	As ZFS requires more kernel stack pages than is the default on some
1648	architectures e.g. i386, it now warns if KSTACK_PAGES is less than
1649	ZFS_MIN_KSTACK_PAGES (which is 4 at the time of writing).
1650
1651	Please consider using 'options KSTACK_PAGES=X' where X is greater
1652	than or equal to ZFS_MIN_KSTACK_PAGES i.e. 4 in such configurations.
1653
165420150706:
1655	sendmail has been updated to 8.15.2.  Starting with FreeBSD 11.0
1656	and sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
1657	default, i.e., they will not contain "::".  For example, instead
1658	of ::1, it will be 0:0:0:0:0:0:0:1.  This permits a zero subnet
1659	to have a more specific match, such as different map entries for
1660	IPv6:0:0 vs IPv6:0.  This change requires that configuration
1661	data (including maps, files, classes, custom ruleset, etc.) must
1662	use the same format, so make certain such configuration data is
1663	upgrading.  As a very simple check search for patterns like
1664	'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.  To return to the old
1665	behavior, set the m4 option confUSE_COMPRESSED_IPV6_ADDRESSES or
1666	the cf option UseCompressedIPv6Addresses.
1667
166820150630:
1669	The default kernel entropy-processing algorithm is now
1670	Fortuna, replacing Yarrow.
1671
1672	Assuming you have 'device random' in your kernel config
1673	file, the configurations allow a kernel option to override
1674	this default. You may choose *ONE* of:
1675
1676	options	RANDOM_YARROW	# Legacy /dev/random algorithm.
1677	options	RANDOM_DUMMY	# Blocking-only driver.
1678
1679	If you have neither, you get Fortuna.  For most people,
1680	read no further, Fortuna will give a /dev/random that works
1681	like it always used to, and the difference will be irrelevant.
1682
1683	If you remove 'device random', you get *NO* kernel-processed
1684	entropy at all. This may be acceptable to folks building
1685	embedded systems, but has complications. Carry on reading,
1686	and it is assumed you know what you need.
1687
1688	*PLEASE* read random(4) and random(9) if you are in the
1689	habit of tweaking kernel configs, and/or if you are a member
1690	of the embedded community, wanting specific and not-usual
1691	behaviour from your security subsystems.
1692
1693	NOTE!! If you use RANDOM_DUMMY and/or have no 'device
1694	random', you will NOT have a functioning /dev/random, and
1695	many cryptographic features will not work, including SSH.
1696	You may also find strange behaviour from the random(3) set
1697	of library functions, in particular sranddev(3), srandomdev(3)
1698	and arc4random(3). The reason for this is that the KERN_ARND
1699	sysctl only returns entropy if it thinks it has some to
1700	share, and with RANDOM_DUMMY or no 'device random' this
1701	will never happen.
1702
170320150623:
1704	An additional fix for the issue described in the 20150614 sendmail
1705	entry below has been committed in revision 284717.
1706
170720150616:
1708	FreeBSD's old make (fmake) has been removed from the system. It is
1709	available as the devel/fmake port or via pkg install fmake.
1710
171120150615:
1712	The fix for the issue described in the 20150614 sendmail entry
1713	below has been committed in revision 284436.  The work
1714	around described in that entry is no longer needed unless the
1715	default setting is overridden by a confDH_PARAMETERS configuration
1716	setting of '5' or pointing to a 512 bit DH parameter file.
1717
171820150614:
1719	ALLOW_DEPRECATED_ATF_TOOLS/ATFFILE support has been removed from
1720	atf.test.mk (included from bsd.test.mk). Please upgrade devel/atf
1721	and devel/kyua to version 0.20+ and adjust any calling code to work
1722	with Kyuafile and kyua.
1723
172420150614:
1725	The import of openssl to address the FreeBSD-SA-15:10.openssl
1726	security advisory includes a change which rejects handshakes
1727	with DH parameters below 768 bits.  sendmail releases prior
1728	to 8.15.2 (not yet released), defaulted to a 512 bit
1729	DH parameter setting for client connections.  To work around
1730	this interoperability, sendmail can be configured to use a
1731	2048 bit DH parameter by:
1732
1733	1. Edit /etc/mail/`hostname`.mc
1734	2. If a setting for confDH_PARAMETERS does not exist or
1735	   exists and is set to a string beginning with '5',
1736	   replace it with '2'.
1737	3. If a setting for confDH_PARAMETERS exists and is set to
1738	   a file path, create a new file with:
1739		openssl dhparam -out /path/to/file 2048
1740	4. Rebuild the .cf file:
1741		cd /etc/mail/; make; make install
1742	5. Restart sendmail:
1743		cd /etc/mail/; make restart
1744
1745	A sendmail patch is coming, at which time this file will be
1746	updated.
1747
174820150604:
1749	Generation of legacy formatted entries have been disabled by default
1750	in pwd_mkdb(8), as all base system consumers of the legacy formatted
1751	entries were converted to use the new format by default when the new,
1752	machine independent format have been added and supported since FreeBSD
1753	5.x.
1754
1755	Please see the pwd_mkdb(8) manual page for further details.
1756
175720150525:
1758	Clang and llvm have been upgraded to 3.6.1 release.  Please see the
1759	20141231 entry below for information about prerequisites and upgrading,
1760	if you are not already using 3.5.0 or higher.
1761
176220150521:
1763	TI platform code switched to using vendor DTS files and this update
1764	may break existing systems running on Beaglebone, Beaglebone Black,
1765	and Pandaboard:
1766
1767	- dtb files should be regenerated/reinstalled. Filenames are the
1768	  same but content is different now
1769	- GPIO addressing was changed, now each GPIO bank (32 pins per bank)
1770	  has its own /dev/gpiocX device, e.g. pin 121 on /dev/gpioc0 in old
1771	  addressing scheme is now pin 25 on /dev/gpioc3.
1772	- Pandaboard: /etc/ttys should be updated, serial console device is
1773	  now /dev/ttyu2, not /dev/ttyu0
1774
177520150501:
1776	soelim(1) from gnu/usr.bin/groff has been replaced by usr.bin/soelim.
1777	If you need the GNU extension from groff soelim(1), install groff
1778	from package: pkg install groff, or via ports: textproc/groff.
1779
178020150423:
1781	chmod, chflags, chown and chgrp now affect symlinks in -R mode as
1782	defined in symlink(7); previously symlinks were silently ignored.
1783
178420150415:
1785	The const qualifier has been removed from iconv(3) to comply with
1786	POSIX.  The ports tree is aware of this from r384038 onwards.
1787
178820150416:
1789	Libraries specified by LIBADD in Makefiles must have a corresponding
1790	DPADD_<lib> variable to ensure correct dependencies.  This is now
1791	enforced in src.libnames.mk.
1792
179320150324:
1794	From legacy ata(4) driver was removed support for SATA controllers
1795	supported by more functional drivers ahci(4), siis(4) and mvs(4).
1796	Kernel modules ataahci and ataadaptec were removed completely,
1797	replaced by ahci and mvs modules respectively.
1798
179920150315:
1800	Clang, llvm and lldb have been upgraded to 3.6.0 release.  Please see
1801	the 20141231 entry below for information about prerequisites and
1802	upgrading, if you are not already using 3.5.0 or higher.
1803
180420150307:
1805	The 32-bit PowerPC kernel has been changed to a position-independent
1806	executable. This can only be booted with a version of loader(8)
1807	newer than January 31, 2015, so make sure to update both world and
1808	kernel before rebooting.
1809
181020150217:
1811	If you are running a -CURRENT kernel since r273872 (Oct 30th, 2014),
1812	but before r278950, the RNG was not seeded properly.  Immediately
1813	upgrade the kernel to r278950 or later and regenerate any keys (e.g.
1814	ssh keys or openssl keys) that were generated w/ a kernel from that
1815	range.  This does not affect programs that directly used /dev/random
1816	or /dev/urandom.  All userland uses of arc4random(3) are affected.
1817
181820150210:
1819	The autofs(4) ABI was changed in order to restore binary compatibility
1820	with 10.1-RELEASE.  The automountd(8) daemon needs to be rebuilt to work
1821	with the new kernel.
1822
182320150131:
1824	The powerpc64 kernel has been changed to a position-independent
1825	executable. This can only be booted with a new version of loader(8),
1826	so make sure to update both world and kernel before rebooting.
1827
182820150118:
1829	Clang and llvm have been upgraded to 3.5.1 release.  This is a bugfix
1830	only release, no new features have been added.  Please see the 20141231
1831	entry below for information about prerequisites and upgrading, if you
1832	are not already using 3.5.0.
1833
183420150107:
1835	ELF tools addr2line, elfcopy (strip), nm, size, and strings are now
1836	taken from the ELF Tool Chain project rather than GNU binutils. They
1837	should be drop-in replacements, with the addition of arm64 support.
1838	The WITHOUT_ELFTOOLCHAIN_TOOLS= knob may be used to obtain the
1839	binutils tools, if necessary. See 20150805 for updated information.
1840
184120150105:
1842	The default Unbound configuration now enables remote control
1843	using a local socket.  Users who have already enabled the
1844	local_unbound service should regenerate their configuration
1845	by running "service local_unbound setup" as root.
1846
184720150102:
1848	The GNU texinfo and GNU info pages have been removed.
1849	To be able to view GNU info pages please install texinfo from ports.
1850
185120141231:
1852	Clang, llvm and lldb have been upgraded to 3.5.0 release.
1853
1854	As of this release, a prerequisite for building clang, llvm and lldb is
1855	a C++11 capable compiler and C++11 standard library.  This means that to
1856	be able to successfully build the cross-tools stage of buildworld, with
1857	clang as the bootstrap compiler, your system compiler or cross compiler
1858	should either be clang 3.3 or later, or gcc 4.8 or later, and your
1859	system C++ library should be libc++, or libdstdc++ from gcc 4.8 or
1860	later.
1861
1862	On any standard FreeBSD 10.x or 11.x installation, where clang and
1863	libc++ are on by default (that is, on x86 or arm), this should work out
1864	of the box.
1865
1866	On 9.x installations where clang is enabled by default, e.g. on x86 and
1867	powerpc, libc++ will not be enabled by default, so libc++ should be
1868	built (with clang) and installed first.  If both clang and libc++ are
1869	missing, build clang first, then use it to build libc++.
1870
1871	On 8.x and earlier installations, upgrade to 9.x first, and then follow
1872	the instructions for 9.x above.
1873
1874	Sparc64 and mips users are unaffected, as they still use gcc 4.2.1 by
1875	default, and do not build clang.
1876
1877	Many embedded systems are resource constrained, and will not be able to
1878	build clang in a reasonable time, or in some cases at all.  In those
1879	cases, cross building bootable systems on amd64 is a workaround.
1880
1881	This new version of clang introduces a number of new warnings, of which
1882	the following are most likely to appear:
1883
1884	-Wabsolute-value
1885
1886	This warns in two cases, for both C and C++:
1887	* When the code is trying to take the absolute value of an unsigned
1888	  quantity, which is effectively a no-op, and almost never what was
1889	  intended.  The code should be fixed, if at all possible.  If you are
1890	  sure that the unsigned quantity can be safely cast to signed, without
1891	  loss of information or undefined behavior, you can add an explicit
1892	  cast, or disable the warning.
1893
1894	* When the code is trying to take an absolute value, but the called
1895	  abs() variant is for the wrong type, which can lead to truncation.
1896	  If you want to disable the warning instead of fixing the code, please
1897	  make sure that truncation will not occur, or it might lead to unwanted
1898	  side-effects.
1899
1900	-Wtautological-undefined-compare and
1901	-Wundefined-bool-conversion
1902
1903	These warn when C++ code is trying to compare 'this' against NULL, while
1904	'this' should never be NULL in well-defined C++ code.  However, there is
1905	some legacy (pre C++11) code out there, which actively abuses this
1906	feature, which was less strictly defined in previous C++ versions.
1907
1908	Squid and openjdk do this, for example.  The warning can be turned off
1909	for C++98 and earlier, but compiling the code in C++11 mode might result
1910	in unexpected behavior; for example, the parts of the program that are
1911	unreachable could be optimized away.
1912
191320141222:
1914	The old NFS client and server (kernel options NFSCLIENT, NFSSERVER)
1915	kernel sources have been removed. The .h files remain, since some
1916	utilities include them. This will need to be fixed later.
1917	If "mount -t oldnfs ..." is attempted, it will fail.
1918	If the "-o" option on mountd(8), nfsd(8) or nfsstat(1) is used,
1919	the utilities will report errors.
1920
192120141121:
1922	The handling of LOCAL_LIB_DIRS has been altered to skip addition of
1923	directories to top level SUBDIR variable when their parent
1924	directory is included in LOCAL_DIRS.  Users with build systems with
1925	such hierarchies and without SUBDIR entries in the parent
1926	directory Makefiles should add them or add the directories to
1927	LOCAL_DIRS.
1928
192920141109:
1930	faith(4) and faithd(8) have been removed from the base system. Faith
1931	has been obsolete for a very long time.
1932
193320141104:
1934	vt(4), the new console driver, is enabled by default. It brings
1935	support for Unicode and double-width characters, as well as
1936	support for UEFI and integration with the KMS kernel video
1937	drivers.
1938
1939	You may need to update your console settings in /etc/rc.conf,
1940	most probably the keymap. During boot, /etc/rc.d/syscons will
1941	indicate what you need to do.
1942
1943	vt(4) still has issues and lacks some features compared to
1944	syscons(4). See the wiki for up-to-date information:
1945	  https://wiki.freebsd.org/Newcons
1946
1947	If you want to keep using syscons(4), you can do so by adding
1948	the following line to /boot/loader.conf:
1949	  kern.vty=sc
1950
195120141102:
1952	pjdfstest has been integrated into kyua as an opt-in test suite.
1953	Please see share/doc/pjdfstest/README for more details on how to
1954	execute it.
1955
195620141009:
1957	gperf has been removed from the base system for architectures
1958	that use clang. Ports that require gperf will obtain it from the
1959	devel/gperf port.
1960
196120140923:
1962	pjdfstest has been moved from tools/regression/pjdfstest to
1963	contrib/pjdfstest .
1964
196520140922:
1966	At svn r271982, The default linux compat kernel ABI has been adjusted
1967	to 2.6.18 in support of the linux-c6 compat ports infrastructure
1968	update.  If you wish to continue using the linux-f10 compat ports,
1969	add compat.linux.osrelease=2.6.16 to your local sysctl.conf.  Users are
1970	encouraged to update their linux-compat packages to linux-c6 during
1971	their next update cycle.
1972
197320140729:
1974	The ofwfb driver, used to provide a graphics console on PowerPC when
1975	using vt(4), no longer allows mmap() of all physical memory. This
1976	will prevent Xorg on PowerPC with some ATI graphics cards from
1977	initializing properly unless x11-servers/xorg-server is updated to
1978	1.12.4_8 or newer.
1979
198020140723:
1981	The xdev targets have been converted to using TARGET and
1982	TARGET_ARCH instead of XDEV and XDEV_ARCH.
1983
198420140719:
1985	The default unbound configuration has been modified to address
1986	issues with reverse lookups on networks that use private
1987	address ranges.  If you use the local_unbound service, run
1988	"service local_unbound setup" as root to regenerate your
1989	configuration, then "service local_unbound reload" to load the
1990	new configuration.
1991
199220140709:
1993	The GNU texinfo and GNU info pages are not built and installed
1994	anymore, WITH_INFO knob has been added to allow to built and install
1995	them again.
1996	UPDATE: see 20150102 entry on texinfo's removal
1997
199820140708:
1999	The GNU readline library is now an INTERNALLIB - that is, it is
2000	statically linked into consumers (GDB and variants) in the base
2001	system, and the shared library is no longer installed.  The
2002	devel/readline port is available for third party software that
2003	requires readline.
2004
200520140702:
2006	The Itanium architecture (ia64) has been removed from the list of
2007	known architectures. This is the first step in the removal of the
2008	architecture.
2009
201020140701:
2011	Commit r268115 has added NFSv4.1 server support, merged from
2012	projects/nfsv4.1-server.  Since this includes changes to the
2013	internal interfaces between the NFS related modules, a full
2014	build of the kernel and modules will be necessary.
2015	__FreeBSD_version has been bumped.
2016
201720140629:
2018	The WITHOUT_VT_SUPPORT kernel config knob has been renamed
2019	WITHOUT_VT.  (The other _SUPPORT knobs have a consistent meaning
2020	which differs from the behaviour controlled by this knob.)
2021
202220140619:
2023	Maximal length of the serial number in CTL was increased from 16 to
2024	64 chars, that breaks ABI.  All CTL-related tools, such as ctladm
2025	and ctld, need to be rebuilt to work with a new kernel.
2026
202720140606:
2028	The libatf-c and libatf-c++ major versions were downgraded to 0 and
2029	1 respectively to match the upstream numbers.  They were out of
2030	sync because, when they were originally added to FreeBSD, the
2031	upstream versions were not respected.  These libraries are private
2032	and not yet built by default, so renumbering them should be a
2033	non-issue.  However, unclean source trees will yield broken test
2034	programs once the operator executes "make delete-old-libs" after a
2035	"make installworld".
2036
2037	Additionally, the atf-sh binary was made private by moving it into
2038	/usr/libexec/.  Already-built shell test programs will keep the
2039	path to the old binary so they will break after "make delete-old"
2040	is run.
2041
2042	If you are using WITH_TESTS=yes (not the default), wipe the object
2043	tree and rebuild from scratch to prevent spurious test failures.
2044	This is only needed once: the misnumbered libraries and misplaced
2045	binaries have been added to OptionalObsoleteFiles.inc so they will
2046	be removed during a clean upgrade.
2047
204820140512:
2049	Clang and llvm have been upgraded to 3.4.1 release.
2050
205120140508:
2052	We bogusly installed src.opts.mk in /usr/share/mk. This file should
2053	be removed to avoid issues in the future (and has been added to
2054	ObsoleteFiles.inc).
2055
205620140505:
2057	/etc/src.conf now affects only builds of the FreeBSD src tree. In the
2058	past, it affected all builds that used the bsd.*.mk files. The old
2059	behavior was a bug, but people may have relied upon it. To get this
2060	behavior back, you can .include /etc/src.conf from /etc/make.conf
2061	(which is still global and isn't changed). This also changes the
2062	behavior of incremental builds inside the tree of individual
2063	directories. Set MAKESYSPATH to ".../share/mk" to do that.
2064	Although this has survived make universe and some upgrade scenarios,
2065	other upgrade scenarios may have broken. At least one form of
2066	temporary breakage was fixed with MAKESYSPATH settings for buildworld
2067	as well... In cases where MAKESYSPATH isn't working with this
2068	setting, you'll need to set it to the full path to your tree.
2069
2070	One side effect of all this cleaning up is that bsd.compiler.mk
2071	is no longer implicitly included by bsd.own.mk. If you wish to
2072	use COMPILER_TYPE, you must now explicitly include bsd.compiler.mk
2073	as well.
2074
207520140430:
2076	The lindev device has been removed since /dev/full has been made a
2077	standard device.  __FreeBSD_version has been bumped.
2078
207920140424:
2080	The knob WITHOUT_VI was added to the base system, which controls
2081	building ex(1), vi(1), etc. Older releases of FreeBSD required ex(1)
2082	in order to reorder files share/termcap and didn't build ex(1) as a
2083	build tool, so building/installing with WITH_VI is highly advised for
2084	build hosts for older releases.
2085
2086	This issue has been fixed in stable/9 and stable/10 in r277022 and
2087	r276991, respectively.
2088
208920140418:
2090	The YES_HESIOD knob has been removed. It has been obsolete for
2091	a decade. Please move to using WITH_HESIOD instead or your builds
2092	will silently lack HESIOD.
2093
209420140405:
2095	The uart(4) driver has been changed with respect to its handling
2096	of the low-level console. Previously the uart(4) driver prevented
2097	any process from changing the baudrate or the CLOCAL and HUPCL
2098	control flags. By removing the restrictions, operators can make
2099	changes to the serial console port without having to reboot.
2100	However, when getty(8) is started on the serial device that is
2101	associated with the low-level console, a misconfigured terminal
2102	line in /etc/ttys will now have a real impact.
2103	Before upgrading the kernel, make sure that /etc/ttys has the
2104	serial console device configured as 3wire without baudrate to
2105	preserve the previous behaviour. E.g:
2106	    ttyu0  "/usr/libexec/getty 3wire"  vt100  on  secure
2107
210820140306:
2109	Support for libwrap (TCP wrappers) in rpcbind was disabled by default
2110	to improve performance.  To re-enable it, if needed, run rpcbind
2111	with command line option -W.
2112
211320140226:
2114	Switched back to the GPL dtc compiler due to updates in the upstream
2115	dts files not being supported by the BSDL dtc compiler. You will need
2116	to rebuild your kernel toolchain to pick up the new compiler. Core dumps
2117	may result while building dtb files during a kernel build if you fail
2118	to do so. Set WITHOUT_GPL_DTC if you require the BSDL compiler.
2119
212020140216:
2121	Clang and llvm have been upgraded to 3.4 release.
2122
212320140216:
2124	The nve(4) driver has been removed.  Please use the nfe(4) driver
2125	for NVIDIA nForce MCP Ethernet adapters instead.
2126
212720140212:
2128	An ABI incompatibility crept into the libc++ 3.4 import in r261283.
2129	This could cause certain C++ applications using shared libraries built
2130	against the previous version of libc++ to crash.  The incompatibility
2131	has now been fixed, but any C++ applications or shared libraries built
2132	between r261283 and r261801 should be recompiled.
2133
213420140204:
2135	OpenSSH will now ignore errors caused by kernel lacking of Capsicum
2136	capability mode support.  Please note that enabling the feature in
2137	kernel is still highly recommended.
2138
213920140131:
2140	OpenSSH is now built with sandbox support, and will use sandbox as
2141	the default privilege separation method.  This requires Capsicum
2142	capability mode support in kernel.
2143
214420140128:
2145	The libelf and libdwarf libraries have been updated to newer
2146	versions from upstream. Shared library version numbers for
2147	these two libraries were bumped. Any ports or binaries
2148	requiring these two libraries should be recompiled.
2149	__FreeBSD_version is bumped to 1100006.
2150
215120140110:
2152	If a Makefile in a tests/ directory was auto-generating a Kyuafile
2153	instead of providing an explicit one, this would prevent such
2154	Makefile from providing its own Kyuafile in the future during
2155	NO_CLEAN builds.  This has been fixed in the Makefiles but manual
2156	intervention is needed to clean an objdir if you use NO_CLEAN:
2157	  # find /usr/obj -name Kyuafile | xargs rm -f
2158
215920131213:
2160	The behavior of gss_pseudo_random() for the krb5 mechanism
2161	has changed, for applications requesting a longer random string
2162	than produced by the underlying enctype's pseudo-random() function.
2163	In particular, the random string produced from a session key of
2164	enctype aes256-cts-hmac-sha1-96 or aes256-cts-hmac-sha1-96 will
2165	be different at the 17th octet and later, after this change.
2166	The counter used in the PRF+ construction is now encoded as a
2167	big-endian integer in accordance with RFC 4402.
2168	__FreeBSD_version is bumped to 1100004.
2169
217020131108:
2171	The WITHOUT_ATF build knob has been removed and its functionality
2172	has been subsumed into the more generic WITHOUT_TESTS.  If you were
2173	using the former to disable the build of the ATF libraries, you
2174	should change your settings to use the latter.
2175
217620131025:
2177	The default version of mtree is nmtree which is obtained from
2178	NetBSD.  The output is generally the same, but may vary
2179	slightly.  If you found you need identical output adding
2180	"-F freebsd9" to the command line should do the trick.  For the
2181	time being, the old mtree is available as fmtree.
2182
218320131014:
2184	libbsdyml has been renamed to libyaml and moved to /usr/lib/private.
2185	This will break ports-mgmt/pkg. Rebuild the port, or upgrade to pkg
2186	1.1.4_8 and verify bsdyml not linked in, before running "make
2187	delete-old-libs":
2188	  # make -C /usr/ports/ports-mgmt/pkg build deinstall install clean
2189	  or
2190	  # pkg install pkg; ldd /usr/local/sbin/pkg | grep bsdyml
2191
219220131010:
2193	The stable/10 branch has been created in subversion from head
2194	revision r256279.
2195
2196COMMON ITEMS:
2197
2198	General Notes
2199	-------------
2200	Sometimes, obscure build problems are the result of environment
2201	poisoning.  This can happen because the make utility reads its
2202	environment when searching for values for global variables.  To run
2203	your build attempts in an "environmental clean room", prefix all make
2204	commands with 'env -i '.  See the env(1) manual page for more details.
2205	Occasionally a build failure will occur with "make -j" due to a race
2206	condition.  If this happens try building again without -j, and please
2207	report a bug if it happens consistently.
2208
2209	When upgrading from one major version to another it is generally best to
2210	upgrade to the latest code in the currently installed branch first, then
2211	do an upgrade to the new branch. This is the best-tested upgrade path,
2212	and has the highest probability of being successful.  Please try this
2213	approach if you encounter problems with a major version upgrade.  Since
2214	the stable 4.x branch point, one has generally been able to upgrade from
2215	anywhere in the most recent stable branch to head / current (or even the
2216	last couple of stable branches). See the top of this file when there's
2217	an exception.
2218
2219	The update process will emit an error on an attempt to perform a build
2220	or install from a FreeBSD version below the earliest supported version.
2221	When updating from an older version the update should be performed one
2222	major release at a time, including running `make delete-old` at each
2223	step.
2224
2225	When upgrading a live system, having a root shell around before
2226	installing anything can help undo problems. Not having a root shell
2227	around can lead to problems if pam has changed too much from your
2228	starting point to allow continued authentication after the upgrade.
2229
2230	This file should be read as a log of events. When a later event changes
2231	information of a prior event, the prior event should not be deleted.
2232	Instead, a pointer to the entry with the new information should be
2233	placed in the old entry. Readers of this file should also sanity check
2234	older entries before relying on them blindly. Authors of new entries
2235	should write them with this in mind.
2236
2237	ZFS notes
2238	---------
2239	When upgrading the boot ZFS pool to a new version, always follow
2240	these two steps:
2241
2242	1.) recompile and reinstall the ZFS boot loader and boot block
2243	(this is part of "make buildworld" and "make installworld")
2244
2245	2.) update the ZFS boot block on your boot drive
2246
2247	The following example updates the ZFS boot block on the
2248	freebsd-boot partition of a GPT partitioned drive ada0:
2249	"gpart bootcode -p /boot/gptzfsboot -i $N ada0"
2250	The value $N will typically be 1 (if booting from BIOS) or 2 (if
2251	booting from EFI).
2252
2253	Non-boot pools do not need these updates.
2254
2255	To build a kernel
2256	-----------------
2257	If you are updating from a prior version of FreeBSD (even one just
2258	a few days old), you should follow this procedure.  It is the most
2259	failsafe as it uses a /usr/obj tree with a fresh mini-buildworld,
2260
2261	make kernel-toolchain
2262	make -DALWAYS_CHECK_MAKE buildkernel KERNCONF=YOUR_KERNEL_HERE
2263	make -DALWAYS_CHECK_MAKE installkernel KERNCONF=YOUR_KERNEL_HERE
2264
2265	To test a kernel once
2266	---------------------
2267	If you just want to boot a kernel once (because you are not sure
2268	if it works, or if you want to boot a known bad kernel to provide
2269	debugging information) run
2270	make installkernel KERNCONF=YOUR_KERNEL_HERE KODIR=/boot/testkernel
2271	nextboot -k testkernel
2272
2273	To rebuild everything and install it on the current system.
2274	-----------------------------------------------------------
2275	# Note: sometimes if you are running current you gotta do more than
2276	# is listed here if you are upgrading from a really old current.
2277
2278	<make sure you have good level 0 dumps>
2279	make buildworld
2280	make buildkernel KERNCONF=YOUR_KERNEL_HERE
2281	make installkernel KERNCONF=YOUR_KERNEL_HERE
2282							[1]
2283	<reboot in single user>				[3]
2284	mergemaster -Fp					[5]
2285	make installworld
2286	mergemaster -Fi					[4]
2287	make delete-old					[6]
2288	<reboot>
2289
2290	To cross-install current onto a separate partition
2291	--------------------------------------------------
2292	# In this approach we use a separate partition to hold
2293	# current's root, 'usr', and 'var' directories.   A partition
2294	# holding "/", "/usr" and "/var" should be about 2GB in
2295	# size.
2296
2297	<make sure you have good level 0 dumps>
2298	<boot into -stable>
2299	make buildworld
2300	make buildkernel KERNCONF=YOUR_KERNEL_HERE
2301	<maybe newfs current's root partition>
2302	<mount current's root partition on directory ${CURRENT_ROOT}>
2303	make installworld DESTDIR=${CURRENT_ROOT} -DDB_FROM_SRC
2304	make distribution DESTDIR=${CURRENT_ROOT} # if newfs'd
2305	make installkernel KERNCONF=YOUR_KERNEL_HERE DESTDIR=${CURRENT_ROOT}
2306	cp /etc/fstab ${CURRENT_ROOT}/etc/fstab 		   # if newfs'd
2307	<edit ${CURRENT_ROOT}/etc/fstab to mount "/" from the correct partition>
2308	<reboot into current>
2309	<do a "native" rebuild/install as described in the previous section>
2310	<maybe install compatibility libraries from ports/misc/compat*>
2311	<reboot>
2312
2313
2314	To upgrade in-place from stable to current
2315	----------------------------------------------
2316	<make sure you have good level 0 dumps>
2317	make buildworld					[9]
2318	make buildkernel KERNCONF=YOUR_KERNEL_HERE	[8]
2319	make installkernel KERNCONF=YOUR_KERNEL_HERE
2320							[1]
2321	<reboot in single user>				[3]
2322	mergemaster -Fp					[5]
2323	make installworld
2324	mergemaster -Fi					[4]
2325	make delete-old					[6]
2326	<reboot>
2327
2328	Make sure that you've read the UPDATING file to understand the
2329	tweaks to various things you need.  At this point in the life
2330	cycle of current, things change often and you are on your own
2331	to cope.  The defaults can also change, so please read ALL of
2332	the UPDATING entries.
2333
2334	Also, if you are tracking -current, you must be subscribed to
2335	[email protected].  Make sure that before you update
2336	your sources that you have read and understood all the recent
2337	messages there.  If in doubt, please track -stable which has
2338	much fewer pitfalls.
2339
2340	[1] If you have third party modules, such as vmware, you should disable
2341	them at this point so they don't crash your system on
2342	reboot. Alternatively, you should rebuild all the modules you have in
2343	your system and install them as well.  If you are running -current, you
2344	should seriously consider placing all sources to all the modules for
2345	your system (or symlinks to them) in /usr/local/sys/modules so this
2346	happens automatically. If all your modules come from ports, then adding
2347	the port origin directories to PORTS_MODULES instead is also automatic
2348	and effective, eg:
2349	     PORTS_MODULES+=x11/nvidia-driver
2350
2351	[3] From the bootblocks, boot -s, and then do
2352		fsck -p
2353		mount -u /
2354		mount -a
2355		sh /etc/rc.d/zfs start	# mount zfs filesystem, if needed
2356		cd src			# full path to source
2357		adjkerntz -i		# if CMOS is wall time
2358	Also, when doing a major release upgrade, it is required that you boot
2359	into single user mode to do the installworld.
2360
2361	[4] Note: This step is non-optional.  Failure to do this step
2362	can result in a significant reduction in the functionality of the
2363	system.  Attempting to do it by hand is not recommended and those
2364	that pursue this avenue should read this file carefully, as well
2365	as the archives of freebsd-current and freebsd-hackers mailing lists
2366	for potential gotchas.  The -U option is also useful to consider.
2367	See mergemaster(8) for more information.
2368
2369	[5] Usually this step is a no-op.  However, from time to time
2370	you may need to do this if you get unknown user in the following
2371	step.  It never hurts to do it all the time.  You may need to
2372	install a new mergemaster (cd src/usr.sbin/mergemaster && make
2373	install) after the buildworld before this step if you last updated
2374	from current before 20130425 or from -stable before 20130430.
2375
2376	[6] This only deletes old files and directories. Old libraries
2377	can be deleted by "make delete-old-libs", but you have to make
2378	sure that no program is using those libraries anymore.
2379
2380	[8] The new kernel must be able to run existing binaries used by an
2381	installworld.  When upgrading across major versions, the new kernel's
2382	configuration must include the correct COMPAT_FREEBSD<n> option for
2383	existing binaries (e.g. COMPAT_FREEBSD11 to run 11.x binaries).  Failure
2384	to do so may leave you with a system that is hard to boot to recover. A
2385	GENERIC kernel will include suitable compatibility options to run
2386	binaries from older branches.  Note that the ability to run binaries
2387	from unsupported branches is not guaranteed.
2388
2389	Make sure that you merge any new devices from GENERIC since the
2390	last time you updated your kernel config file. Options also
2391	change over time, so you may need to adjust your custom kernels
2392	for these as well.
2393
2394	[9] If CPUTYPE is defined in your /etc/make.conf, make sure to use the
2395	"?=" instead of the "=" assignment operator, so that buildworld can
2396	override the CPUTYPE if it needs to.
2397
2398	MAKEOBJDIRPREFIX must be defined in an environment variable, and
2399	not on the command line, or in /etc/make.conf.  buildworld will
2400	warn if it is improperly defined.
2401FORMAT:
2402
2403This file contains a list, in reverse chronological order, of major
2404breakages in tracking -current.  It is not guaranteed to be a complete
2405list of such breakages, and only contains entries since September 23, 2011.
2406If you need to see UPDATING entries from before that date, you will need
2407to fetch an UPDATING file from an older FreeBSD release.
2408
2409Copyright information:
2410
2411Copyright 1998-2009 M. Warner Losh <[email protected]>
2412
2413Redistribution, publication, translation and use, with or without
2414modification, in full or in part, in any form or format of this
2415document are permitted without further permission from the author.
2416
2417THIS DOCUMENT IS PROVIDED BY WARNER LOSH ``AS IS'' AND ANY EXPRESS OR
2418IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
2419WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2420DISCLAIMED.  IN NO EVENT SHALL WARNER LOSH BE LIABLE FOR ANY DIRECT,
2421INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2422(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2423SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2424HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2425STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
2426IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
2427POSSIBILITY OF SUCH DAMAGE.
2428
2429Contact Warner Losh if you have any questions about your use of
2430this document.
2431
2432$FreeBSD$
2433