xref: /freebsd/UPDATING (revision 33b8c039a960bcff3471baf5929558c4d1500727)
1Updating Information for FreeBSD current users.
2
3This file is maintained and copyrighted by M. Warner Losh <imp@freebsd.org>.
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://docs.freebsd.org/en/books/handbook/cutting-edge/#makeworld
10
11Items affecting the ports and packages system can be found in
12/usr/ports/UPDATING.  Please read that file before updating system packages
13and/or ports.
14
15NOTE TO PEOPLE WHO THINK THAT FreeBSD 14.x IS SLOW:
16	FreeBSD 14.x has many debugging features turned on, in both the kernel
17	and userland.  These features attempt to detect incorrect use of
18	system primitives, and encourage loud failure through extra sanity
19	checking and fail stop semantics.  They also substantially impact
20	system performance.  If you want to do performance measurement,
21	benchmarking, and optimization, you'll want to turn them off.  This
22	includes various WITNESS- related kernel options, INVARIANTS, malloc
23	debugging flags in userland, and various verbose features in the
24	kernel.  Many developers choose to disable these features on build
25	machines to maximize performance.  (To completely disable malloc
26	debugging, define WITH_MALLOC_PRODUCTION in /etc/src.conf and rebuild
27	world, or to merely disable the most expensive debugging functionality
28	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
29
3020210624:
31	The NFSv4 client now uses the highest minor version of NFSv4
32	supported by the NFSv4 server by default instead of minor version 0,
33	for NFSv4 mounts.
34	The "minorversion" mount option may be used to override this default.
35
3620210618:
37	Bump __FreeBSD_version to 1400024 for LinuxKPI changes.
38	Most notably netdev.h can change now as the (last) dependencies
39	(mlx4/ofed) are now using struct ifnet directly, but also for PCI
40	additions and others.
41
4220210618:
43	The directory "blacklisted" under /usr/share/certs/ has been
44	renamed to "untrusted".
45
4620210611:
47	svnlite has been removed from base. Should you need svn for any reason
48	please install the svn package or port.
49
5020210611:
51	Commit e1a907a25cfa changed the internal KAPI between the krpc
52	and nfsserver.  As such, both modules must be rebuilt from
53	sources.  Bump __FreeBSD_version to 1400022.
54
5520210610:
56	The an(4) driver has been removed from FreeBSD.
57
5820210608:
59	The vendor/openzfs branch was renamed to vendor/openzfs/legacy to
60	start tracking OpenZFS upstream more closely. Please see
61https://lists.freebsd.org/archives/freebsd-current/2021-June/000153.html
62	for details on how to correct any errors that might result. The
63	short version is that you need to remove the old branch locally:
64	    git update-ref -d refs/remotes/freebsd/vendor/openzfs
65	(assuming your upstream origin is named 'freebsd').
66
6720210525:
68	Commits 17accc08ae15 and de102f870501 add new files to LinuxKPI
69	which break drm-kmod.  In addition various other additions where
70	comitted. Bump __FreeBSD_version to 1400015 to be able to detect this.
71
7220210513:
73	Commit ca179c4d74f2 changed the package in which the OpenSSL
74	libraries and utilities are packaged.
75	It is recommended for pkgbase user to do:
76	pkg install -f FreeBSD-openssl
77	before pkg upgrade otherwise some dependencies might not be met
78	and pkg will stop working as libssl will not be present anymore
79	on the system.
80
8120210426:
82	Commit 875977314881 changed the internal KAPI between
83	the nfsd and nfscommon modules.  As such these modules
84	need to be rebuilt from sources.
85	Without this patch in your NFSv4.1/4.2 server, enabling
86	delegations by setting vfs.nfsd.issue_delegations non-zero
87	is not recommended.
88
8920210411:
90	Commit 7763814fc9c2 changed the internal KAPI between
91	the krpc and NFS.  As such, the krpc, nfscommon and
92	nfscl modules must all be rebuilt from sources.
93	Without this patch, NFSv4.1/4.2 mounts should not
94	be done with the nfscbd(8) daemon running, to avoid
95	needing a working back channel for server->client RPCs.
96
9720210330:
98	Commit 01ae8969a9ee fixed the NFSv4.1/4.2 server so that it
99	handles binding of the back channel as required by RFC5661.
100	Until this patch is in your server, avoid use of the "nconnects"
101	mount option for Linux NFSv4.1/4.2 mounts.
102
10320210225:
104	For 64-bit architectures the base system is now built with Position
105	Independent Executable (PIE) support enabled by default.  It may be
106	disabled using the WITHOUT_PIE knob.  A clean build is required.
107
10820210128:
109	Various LinuxKPI functionality was added which conflicts with DRM.
110	Please update your drm-kmod port to after the __FreeBSD_verison 1400003
111	update.
112
11320210108:
114	PC Card attachments for all devices have been removed. In the case of
115	wi and cmx, the entire drivers were removed because they were only
116	PC Card devices. FreeBSD_version 1300134 should be used for this
117	since it was bumped so recently.
118
11920210107:
120	Transport-independent parts of HID support have been split off the USB
121	code in to separate subsystem.  Kernel configs which include one of
122	ums, ukbd, uhid, atp, wsp, wmt, uaudio, ugold or ucycom drivers should
123	be updated with adding of "device hid" line.
124
12520210105:
126	ncurses installation has been modified to only keep the widechar
127	enabled version.  Incremental build is broken for that change, so it
128	requires a clean build.
129
13020201223:
131	The FreeBSD project has migrated from Subversion to Git. Temporary
132	instructions can be found at
133	https://github.com/bsdimp/freebsd-git-docs/blob/main/src-cvt.md
134	and other documents in that repo.
135
13620201216:
137	The services database has been updated to cover more of the basic
138	services expected in a modern system. The database is big enough
139	that it will cause issues in mergemaster in Releases previous to
140	12.2 and 11.3, or in very old current systems from before r358154.
141
14220201215:
143	Obsolete in-tree GDB 6.1.1 has been removed.  GDB (including kgdb)
144	may be installed from ports or packages.
145
14620201124:
147	ping6 has been merged into ping.  It can now be called as "ping -6".
148	See ping(8) for details.
149
15020201108:
151	Default value of net.add_addr_allfibs has been changed to 0.
152	If you have multi-fib configuration and rely on existence of all
153	interface routes in every fib, you need to set the above sysctl to 1.
154
15520201030:
156	The internal pre-processor in the calendar(1) program has been
157	extended to support more C pre-processor commands (e.g. #ifdef, #else,
158	and #undef) and to detect unbalanced conditional statements.
159	Error messages have been extended to include the filename and line
160	number if processing stops to help fixing malformed data files.
161
16220201026:
163	All the data files for the calendar(1) program, except calendar.freebsd,
164	have been moved to the deskutils/calendar-data port, much like the
165	jewish calendar entries were moved to deskutils/hebcal years ago. After
166	make delete-old-files, you need to install it to retain full
167	functionality. calendar(1) will issue a reminder for files it can't
168	find.
169
17020200923:
171	LINT files are no longer generated. We now include the relevant NOTES
172	files. Note: This may cause conflicts with updating in some cases.
173	        find sys -name LINT\* -delete
174	is suggested across this commit	to remove the generated	LINT files.
175
176	If you have tried to update with generated files there, the svn
177	command you want to un-auger the tree is
178		cd sys/amd64/conf
179		svn revert -R .
180	and then do the above find from the top level. Substitute 'amd64'
181	above with where the error message indicates a conflict.
182
18320200824:
184	OpenZFS support has been integrated. Do not upgrade root pools until
185	the loader is updated to support zstd. Furthermore, we caution against
186	'zpool upgrade' for the next few weeks. The change should be transparent
187	unless you  want to use new features.
188
189	Not all "NO_CLEAN" build scenarios work across these changes. Many
190	scenarios have been tested and fixed, but rebuilding kernels without
191	rebuilding world may fail.
192
193	The ZFS cache file has moved from /boot to /etc to match the OpenZFS
194	upstream default. A fallback to /boot has been added for mountroot.
195
196	Pool auto import behavior at boot has been moved from the kernel module
197	to an explicit "zpool import -a" in one of the rc scripts enabled by
198	zfs_enable=YES. This means your non-root zpools won't auto import until
199	you upgrade your /etc/rc.d files.
200
20120200824:
202	The resume code now notifies devd with the 'kernel' system
203	rather than the old 'kern' subsystem to be consistent with
204	other use. The old notification will be created as well, but
205	will be removed prior to FreeBSD 14.0.
206
20720200821:
208	r362275 changed the internal API between the kernel RPC and the
209	NFS modules. As such, all the modules must be recompiled from
210	sources.
211
21220200817:
213	r364330 modified the internal API used between the NFS modules.
214	As such, all the NFS modules must be re-compiled from sources.
215
21620200816:
217	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
218	been upgraded to 11.0.0.  Please see the 20141231 entry below for
219	information about prerequisites and upgrading, if you are not already
220	using clang 3.5.0 or higher.
221
22220200810:
223	r364092 modified the internal ABI used between the kernel NFS
224	modules.  As such, all of these modules need to be rebuilt
225	from sources, so a version bump was done.
226
22720200807:
228	Makefile.inc has been updated to work around the issue documented in
229	20200729. It was a case where the optimization of using symbolic links
230	to point to binaries created a situation where we'd run new binaries
231	with old libraries starting midway through the installworld process.
232
23320200729:
234	r363679 has redefined some undefined behavior in regcomp(3); notably,
235	extraneous escapes of most ordinary characters will no longer be
236	accepted.  An exp-run has identified all of the problems with this in
237	ports, but other non-ports software may need extra escapes removed to
238	continue to function.
239
240	Because of this change, installworld may encounter the following error
241	from rtld: Undefined symbol "regcomp@FBSD_1.6" -- It is imperative that
242	you do not halt installworld. Instead, let it run to completion (whether
243	successful or not) and run installworld once more.
244
24520200627:
246	A new implementation of bc and dc has been imported in r362681. This
247	implementation corrects non-conformant behavior of the previous bc
248	and adds GNU bc compatible options. It offers a number of extensions,
249	is much faster on large values, and has support for message catalogs
250	(a number of languages are already supported, contributions of further
251	languages welcome). The option WITHOUT_GH_BC can be used to build the
252	world with the previous versions of bc and dc.
253
25420200625:
255	r362639 changed the internal API used between the NFS kernel modules.
256	As such, they all need to be rebuilt from sources.
257
25820200613:
259	r362158 changed the arguments for VFS_CHECKEXP().  As such, any
260	out of tree file systems need to be modified and rebuilt.
261	Also, any file systems that are modules must be rebuilt.
262
26320200604:
264	read(2) of a directory fd is now rejected by default.  root may
265	re-enable it for system root only on non-ZFS filesystems with the
266	security.bsd.allow_read_dir sysctl(8) MIB if
267	security.bsd.suser_enabled=1.
268
269	It may be advised to setup aliases for grep to default to `-d skip` if
270	commonly non-recursively grepping a list that includes directories and
271	the potential for the resulting stderr output is not tolerable.  Example
272	aliases are now installed, commented out, in /root/.cshrc and
273	/root/.shrc.
274
27520200523:
276	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
277	been upgraded to 10.0.1.  Please see the 20141231 entry below for
278	information about prerequisites and upgrading, if you are not already
279	using clang 3.5.0 or higher.
280
28120200512:
282	Support for obsolete compilers has been removed from the build system.
283	Clang 6 and GCC 6.4 are the minimum supported versions.
284
28520200424:
286	closefrom(2) has been moved under COMPAT12, and replaced in libc with a
287	stub that calls close_range(2).  If using a custom kernel configuration,
288	you may want to ensure that the COMPAT_FREEBSD12 option is included, as
289	a slightly older -CURRENT userland and older FreeBSD userlands may not
290	be functional without closefrom(2).
291
29220200414:
293	Upstream DTS from Linux 5.6 was merged and they now have the SID
294	and THS (Secure ID controller and THermal Sensor) node present.
295	The DTB overlays have now been removed from the tree for the H3/H5 and
296	A64 SoCs and the aw_sid and aw_thermal driver have been updated to
297	deal with upstream DTS. If you are using those overlays you need to
298	remove them from loader.conf and update the DTBs on the FAT partition.
299
30020200310:
301	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
302	been upgraded to 10.0.0.  Please see the 20141231 entry below for
303	information about prerequisites and upgrading, if you are not already
304	using clang 3.5.0 or higher.
305
30620200309:
307	The amd(8) automount daemon has been removed from the source tree.
308	As of FreeBSD 10.1 autofs(5) is the preferred tool for automounting.
309	amd is still available in the sysutils/am-utils port.
310
31120200301:
312	Removed brooktree driver (bktr.4) from the tree.
313
31420200229:
315	The WITH_GPL_DTC option has been removed.  The BSD-licenced device tree
316	compiler in usr.bin/dtc is used on all architectures which use dtc, and
317	the GPL dtc is available (if needed) from the sysutils/dtc port.
318
31920200229:
320	The WITHOUT_LLVM_LIBUNWIND option has been removed.  LLVM's libunwind
321	is used by all supported CPU architectures.
322
32320200229:
324	GCC 4.2.1 has been removed from the tree.  The WITH_GCC,
325	WITH_GCC_BOOTSTRAP, and WITH_GNUCXX options are no longer available.
326	Users who wish to build FreeBSD with GCC must use the external toolchain
327	ports or packages.
328
32920200220:
330	ncurses has been updated to a newer version (6.2-20200215). Given the ABI
331	has changed, users will have to rebuild all the ports that are linked to
332	ncurses.
333
33420200217:
335	The size of struct vnet and the magic cookie have changed.
336	Users need to recompile libkvm and all modules using VIMAGE
337	together with their new kernel.
338
33920200212:
340	Defining the long deprecated NO_CTF, NO_DEBUG_FILES, NO_INSTALLLIB,
341	NO_MAN, NO_PROFILE, and NO_WARNS variables is now an error.  Update
342	your Makefiles and scripts to define MK_<var>=no instead as required.
343
344	One exception to this is that program or library Makefiles should
345	define MAN to empty rather than setting MK_MAN=no.
346
34720200108:
348	Clang/LLVM is now the default compiler and LLD the default
349	linker for riscv64.
350
35120200107:
352	make universe no longer uses GCC 4.2.1 on any architectures.
353	Architectures not supported by in-tree Clang/LLVM require an
354	external toolchain package.
355
35620200104:
357	GCC 4.2.1 is now not built by default, as part of the GCC 4.2.1
358	retirement plan.  Specifically, the GCC, GCC_BOOTSTRAP, and GNUCXX
359	options default to off for all supported CPU architectures.  As a
360	short-term transition aid they may be enabled via WITH_* options.
361	GCC 4.2.1 is expected to be removed from the tree on 2020-03-31.
362
36320200102:
364	Support for armv5 has been disconnected and is being removed. The
365	machine combination MACHINE=arm MACHINE_ARCH=arm is no longer valid.
366	You must now use a MACHINE_ARCH of armv6 or armv7. The default
367	MACHINE_ARCH for MACHINE=arm is now armv7.
368
36920191226:
370	Clang/LLVM is now the default compiler for all powerpc architectures.
371	LLD is now the default linker for powerpc64.  The change for powerpc64
372	also includes a change to the ELFv2 ABI, incompatible with the existing
373	ABI.
374
37520191226:
376	Kernel-loadable random(4) modules are no longer unloadable.
377
37820191222:
379	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
380	been upgraded to 9.0.1.  Please see the 20141231 entry below for
381	information about prerequisites and upgrading, if you are not already
382	using clang 3.5.0 or higher.
383
38420191212:
385	r355677 has modified the internal interface used between the
386	NFS modules in the kernel. As such, they must all be upgraded
387	simultaneously. I will do a version bump for this.
388
38920191205:
390	The root certificates of the Mozilla CA Certificate Store have been
391	imported into the base system and can be managed with the certctl(8)
392	utility.  If you have installed the security/ca_root_nss port or package
393	with the ETCSYMLINK option (the default), be advised that there may be
394	differences between those included in the port and those included in
395	base due to differences in nss branch used as well as general update
396	frequency.  Note also that certctl(8) cannot manage certs in the
397	format used by the security/ca_root_nss port.
398
39920191120:
400	The amd(8) automount daemon has been disabled by default, and will be
401	removed in the future.  As of FreeBSD 10.1 the autofs(5) is available
402	for automounting.
403
40420191107:
405	The nctgpio and wbwd drivers have been moved to the superio bus.
406	If you have one of these drivers in a kernel configuration, then
407	you should add device superio to it.  If you use one of these drivers
408	as a module and you compile a custom set of modules, then you should
409	add superio to the set.
410
41120191021:
412	KPIs for network drivers to access interface addresses have changed.
413	Users need to recompile NIC driver modules together with kernel.
414
41520191021:
416	The net.link.tap.user_open sysctl no longer prevents user opening of
417	already created /dev/tapNN devices.  Access is still controlled by
418	node permissions, just like tun devices.  The net.link.tap.user_open
419	sysctl is now used only to allow users to perform devfs cloning of
420	tap devices, and the subsequent open may not succeed if the user is not
421	in the appropriate group.  This sysctl may be deprecated/removed
422	completely in the future.
423
42420191009:
425	mips, powerpc, and sparc64 are no longer built as part of
426	universe / tinderbox unless MAKE_OBSOLETE_GCC is defined. If
427	not defined, mips, powerpc, and sparc64 builds will look for
428	the xtoolchain binaries and if installed use them for universe
429	builds. As llvm 9.0 becomes vetted for these architectures, they
430	will be removed from the list.
431
43220191009:
433	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
434	been upgraded to 9.0.0.  Please see the 20141231 entry below for
435	information about prerequisites and upgrading, if you are not already
436	using clang 3.5.0 or higher.
437
43820191003:
439	The hpt27xx, hptmv, hptnr, and hptrr drivers have been removed from
440	GENERIC.  They are available as modules and can be loaded by adding
441	to /boot/loader.conf hpt27xx_load="YES", hptmv_load="YES",
442	hptnr_load="YES", or hptrr_load="YES", respectively.
443
44420190913:
445	ntpd no longer by default locks its pages in memory, allowing them
446	to be paged out by the kernel. Use rlimit memlock to restore
447	historic BSD behaviour. For example, add "rlimit memlock 32"
448	to ntp.conf to lock up to 32 MB of ntpd address space in memory.
449
45020190823:
451	Several of ping6's options have been renamed for better consistency
452	with ping.  If you use any of -ARWXaghmrtwx, you must update your
453	scripts.  See ping6(8) for details.
454
45520190727:
456	The vfs.fusefs.sync_unmount and vfs.fusefs.init_backgrounded sysctls
457	and the "-o sync_unmount" and "-o init_backgrounded" mount options have
458	been removed from mount_fusefs(8).  You can safely remove them from
459	your scripts, because they had no effect.
460
461	The vfs.fusefs.fix_broken_io, vfs.fusefs.sync_resize,
462	vfs.fusefs.refresh_size, vfs.fusefs.mmap_enable,
463	vfs.fusefs.reclaim_revoked, and vfs.fusefs.data_cache_invalidate
464	sysctls have been removed.  If you felt the need to set any of them to
465	a non-default value, please tell asomers@FreeBSD.org why.
466
46720190713:
468	Default permissions on the /var/account/acct file (and copies of it
469	rotated by periodic daily scripts) are changed from 0644 to 0640
470	because the file contains sensitive information that should not be
471	world-readable.  If the /var/account directory must be created by
472	rc.d/accounting, the mode used is now 0750.  Admins who use the
473	accounting feature are encouraged to change the mode of an existing
474	/var/account directory to 0750 or 0700.
475
47620190620:
477	Entropy collection and the /dev/random device are no longer optional
478	components.  The "device random" option has been removed.
479	Implementations of distilling algorithms can still be made loadable
480	with "options RANDOM_LOADABLE" (e.g., random_fortuna.ko).
481
48220190612:
483	Clang, llvm, lld, lldb, compiler-rt, libc++, libunwind and openmp have
484	been upgraded to 8.0.1.  Please see the 20141231 entry below for
485	information about prerequisites and upgrading, if you are not already
486	using clang 3.5.0 or higher.
487
48820190608:
489	A fix was applied to i386 kernel modules to avoid panics with
490	dpcpu or vnet.  Users need to recompile i386 kernel modules
491	having pcpu or vnet sections or they will refuse to load.
492
49320190513:
494	User-wired pages now have their own counter,
495	vm.stats.vm.v_user_wire_count.  The vm.max_wired sysctl was renamed
496	to vm.max_user_wired and changed from an unsigned int to an unsigned
497	long.  bhyve VMs wired with the -S are now subject to the user
498	wiring limit; the vm.max_user_wired sysctl may need to be tuned to
499	avoid running into the limit.
500
50120190507:
502	The IPSEC option has been removed from GENERIC.  Users requiring
503	ipsec(4) must now load the ipsec(4) kernel module.
504
50520190507:
506	The tap(4) driver has been folded into tun(4), and the module has been
507	renamed to tuntap.  You should update any kld_list="if_tap" or
508	kld_list="if_tun" entries in /etc/rc.conf, if_tap_load="YES" or
509	if_tun_load="YES" entries in /boot/loader.conf to load the if_tuntap
510	module instead, and "device tap" or "device tun" entries in kernel
511	config files to select the tuntap device instead.
512
51320190418:
514	The following knobs have been added related to tradeoffs between
515	safe use of the random device and availability in the absence of
516	entropy:
517
518	kern.random.initial_seeding.bypass_before_seeding: tunable; set
519	non-zero to bypass the random device prior to seeding, or zero to
520	block random requests until the random device is initially seeded.
521	For now, set to 1 (unsafe) by default to restore pre-r346250 boot
522	availability properties.
523
524	kern.random.initial_seeding.read_random_bypassed_before_seeding:
525	read-only diagnostic sysctl that is set when bypass is enabled and
526	read_random(9) is bypassed, to enable programmatic handling of this
527	initial condition, if desired.
528
529	kern.random.initial_seeding.arc4random_bypassed_before_seeding:
530	Similar to the above, but for for arc4random(9) initial seeding.
531
532	kern.random.initial_seeding.disable_bypass_warnings: tunable; set
533	non-zero to disable warnings in dmesg when the same conditions are
534	met as for the diagnostic sysctls above.  Defaults to zero, i.e.,
535	produce warnings in dmesg when the conditions are met.
536
53720190416:
538	The loadable random module KPI has changed; the random_infra_init()
539	routine now requires a 3rd function pointer for a bool (*)(void)
540	method that returns true if the random device is seeded (and
541	therefore unblocked).
542
54320190404:
544	r345895 reverts r320698. This implies that an nfsuserd(8) daemon
545	built from head sources between r320757 (July 6, 2017) and
546	r338192 (Aug. 22, 2018) will not work unless the "-use-udpsock"
547	is added to the command line.
548	nfsuserd daemons built from head sources that are post-r338192 are
549	not affected and should continue to work.
550
55120190320:
552	The fuse(4) module has been renamed to fusefs(4) for consistency with
553	other filesystems.  You should update any kld_load="fuse" entries in
554	/etc/rc.conf, fuse_load="YES" entries in /boot/loader.conf, and
555	"options FUSE" entries in kernel config files.
556
55720190304:
558	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
559	8.0.0.  Please see the 20141231 entry below for information about
560	prerequisites and upgrading, if you are not already using clang 3.5.0
561	or higher.
562
56320190226:
564	geom_uzip(4) depends on the new module xz.  If geom_uzip is statically
565	compiled into your custom kernel, add 'device xz' statement to the
566	kernel config.
567
56820190219:
569	drm and drm2 have been removed from the tree. Please see
570	https://wiki.freebsd.org/Graphics for the latest information on
571	migrating to the drm ports.
572
57320190131:
574	Iflib is no longer unconditionally compiled into the kernel.  Drivers
575	using iflib and statically compiled into the kernel, now require
576	the 'device iflib' config option.  For the same drivers loaded as
577	modules on kernels not having 'device iflib', the iflib.ko module
578	is loaded automatically.
579
58020190125:
581	The IEEE80211_AMPDU_AGE and AH_SUPPORT_AR5416 kernel configuration
582	options no longer exist since r343219 and r343427 respectively;
583	nothing uses them, so they should be just removed from custom
584	kernel config files.
585
58620181230:
587	r342635 changes the way efibootmgr(8) works by requiring users to add
588	the -b (bootnum) parameter for commands where the bootnum was previously
589	specified with each option. For example 'efibootmgr -B 0001' is now
590	'efibootmgr -B -b 0001'.
591
59220181220:
593	r342286 modifies the NFSv4 server so that it obeys vfs.nfsd.nfs_privport
594	in the same as it is applied to NFSv2 and 3.  This implies that NFSv4
595	servers that have vfs.nfsd.nfs_privport set will only allow mounts
596	from clients using a reserved port#. Since both the FreeBSD and Linux
597	NFSv4 clients use reserved port#s by default, this should not affect
598	most NFSv4 mounts.
599
60020181219:
601	The XLP config has been removed. We can't support 64-bit atomics in this
602	kernel because it is running in 32-bit mode. XLP users must transition
603	to running a 64-bit kernel (XLP64 or XLPN32).
604
605	The mips GXEMUL support has been removed from FreeBSD. MALTA* + qemu is
606	the preferred emulator today and we don't need two different ones.
607
608	The old sibyte / swarm / Broadcom BCM1250 support has been
609	removed from the mips port.
610
61120181211:
612	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
613	7.0.1.  Please see the 20141231 entry below for information about
614	prerequisites and upgrading, if you are not already using clang 3.5.0
615	or higher.
616
61720181211:
618	Remove the timed and netdate programs from the base tree.  Setting
619	the time with these daemons has been obsolete for over a decade.
620
62120181126:
622	On amd64, arm64 and armv7 (architectures that install LLVM's ld.lld
623	linker as /usr/bin/ld) GNU ld is no longer installed as ld.bfd, as
624	it produces broken binaries when ifuncs are in use.  Users needing
625	GNU ld should install the binutils port or package.
626
62720181123:
628	The BSD crtbegin and crtend code has been enabled by default. It has
629	had extensive testing on amd64, arm64, and i386. It can be disabled
630	by building a world with -DWITHOUT_BSD_CRTBEGIN.
631
63220181115:
633	The set of CTM commands (ctm, ctm_smail, ctm_rmail, ctm_dequeue)
634	has been converted to a port (misc/ctm) and will be removed from
635	FreeBSD-13.  It is available as a package (ctm) for all supported
636	FreeBSD versions.
637
63820181110:
639	The default newsyslog.conf(5) file has been changed to only include
640	files in /etc/newsyslog.conf.d/ and /usr/local/etc/newsyslog.conf.d/ if
641	the filenames end in '.conf' and do not begin with a '.'.
642
643	You should check the configuration files in these two directories match
644	this naming convention. You can verify which configuration files are
645	being included using the command:
646		$ newsyslog -Nrv
647
64820181015:
649	Ports for the DRM modules have been simplified. Now, amd64 users should
650	just install the drm-kmod port. All others should install
651	drm-legacy-kmod.
652
653	Graphics hardware that's newer than about 2010 usually works with
654	drm-kmod.  For hardware older than 2013, however, some users will need
655	to use drm-legacy-kmod if drm-kmod doesn't work for them. Hardware older
656	than 2008 usually only works in drm-legacy-kmod. The graphics team can
657	only commit to hardware made since 2013 due to the complexity of the
658	market and difficulty to test all the older cards effectively. If you
659	have hardware supported by drm-kmod, you are strongly encouraged to use
660	that as you will get better support.
661
662	Other than KPI chasing, drm-legacy-kmod will not be updated. As outlined
663	elsewhere, the drm and drm2 modules will be eliminated from the src base
664	soon (with a limited exception for arm). Please update to the package
665	asap and report any issues to x11@freebsd.org.
666
667	Generally, anybody using the drm*-kmod packages should add
668	WITHOUT_DRM_MODULE=t and WITHOUT_DRM2_MODULE=t to avoid nasty
669	cross-threading surprises, especially with automatic driver
670	loading from X11 startup. These will become the defaults in 13-current
671	shortly.
672
67320181012:
674	The ixlv(4) driver has been renamed to iavf(4).  As a consequence,
675	custom kernel and module loading configuration files must be updated
676	accordingly.  Moreover, interfaces previous presented as ixlvN to the
677	system are now exposed as iavfN and network configuration files must
678	be adjusted as necessary.
679
68020181009:
681	OpenSSL has been updated to version 1.1.1.  This update included
682	additional various API changes throughout the base system.  It is
683	important to rebuild third-party software after upgrading.  The value
684	of __FreeBSD_version has been bumped accordingly.
685
68620181006:
687	The legacy DRM modules and drivers have now been added to the loader's
688	module blacklist, in favor of loading them with kld_list in rc.conf(5).
689	The module blacklist may be overridden with the loader.conf(5)
690	'module_blacklist' variable, but loading them via rc.conf(5) is strongly
691	encouraged.
692
69320181002:
694	The cam(4) based nda(4) driver will be used over nvd(4) by default on
695	powerpc64. You may set 'options NVME_USE_NVD=1' in your kernel conf or
696	loader tunable 'hw.nvme.use_nvd=1' if you wish to use the existing
697	driver.  Make sure to edit /boot/etc/kboot.conf and fstab to use the
698	nda device name.
699
70020180913:
701	Reproducible build mode is now on by default, in preparation for
702	FreeBSD 12.0.  This eliminates build metadata such as the user,
703	host, and time from the kernel (and uname), unless the working tree
704	corresponds to a modified checkout from a version control system.
705	The previous behavior can be obtained by setting the /etc/src.conf
706	knob WITHOUT_REPRODUCIBLE_BUILD.
707
70820180826:
709	The Yarrow CSPRNG has been removed from the kernel as it has not been
710	supported by its designers since at least 2003. Fortuna has been the
711	default since FreeBSD-11.
712
71320180822:
714	devctl freeze/thaw have gone into the tree, the rc scripts have been
715	updated to use them and devmatch has been changed.  You should update
716	kernel, userland and rc scripts all at the same time.
717
71820180818:
719	The default interpreter has been switched from 4th to Lua.
720	LOADER_DEFAULT_INTERP, documented in build(7), will override the default
721	interpreter.  If you have custom FORTH code you will need to set
722	LOADER_DEFAULT_INTERP=4th (valid values are 4th, lua or simp) in
723	src.conf for the build.  This will create default hard links between
724	loader and loader_4th instead of loader and loader_lua, the new default.
725	If you are using UEFI it will create the proper hard link to loader.efi.
726
727	bhyve uses userboot.so. It remains 4th-only until some issues are solved
728	regarding coexisting with multiple versions of FreeBSD are resolved.
729
73020180815:
731	ls(1) now respects the COLORTERM environment variable used in other
732	systems and software to indicate that a colored terminal is both
733	supported and desired.  If ls(1) is suddenly emitting colors, they may
734	be disabled again by either removing the unwanted COLORTERM from your
735	environment, or using `ls --color=never`.  The ls(1) specific CLICOLOR
736	may not be observed in a future release.
737
73820180808:
739	The default pager for most commands has been changed to "less".  To
740	restore the old behavior, set PAGER="more" and MANPAGER="more -s" in
741	your environment.
742
74320180731:
744	The jedec_ts(4) driver has been removed. A superset of its functionality
745	is available in the jedec_dimm(4) driver, and the manpage for that
746	driver includes migration instructions. If you have "device jedec_ts"
747	in your kernel configuration file, it must be removed.
748
74920180730:
750	amd64/GENERIC now has EFI runtime services, EFIRT, enabled by default.
751	This should have no effect if the kernel is booted via BIOS/legacy boot.
752	EFIRT may be disabled via a loader tunable, efi.rt.disabled, if a system
753	has a buggy firmware that prevents a successful boot due to use of
754	runtime services.
755
75620180727:
757	Atmel AT91RM9200 and AT91SAM9, Cavium CNS 11xx and XScale
758	support has been removed from the tree. These ports were
759	obsolete and/or known to be broken for many years.
760
76120180723:
762	loader.efi has been augmented to participate more fully in the
763	UEFI boot manager protocol. loader.efi will now look at the
764	BootXXXX environment variable to determine if a specific kernel
765	or root partition was specified. XXXX is derived from BootCurrent.
766	efibootmgr(8) manages these standard UEFI variables.
767
76820180720:
769	zfsloader's functionality has now been folded into loader.
770	zfsloader is no longer necessary once you've updated your
771	boot blocks. For a transition period, we will install a
772	hardlink for zfsloader to loader to allow a smooth transition
773	until the boot blocks can be updated (hard link because old
774	zfs boot blocks don't understand symlinks).
775
77620180719:
777	ARM64 now have efifb support, if you want to have serial console
778	on your arm64 board when an screen is connected and the bootloader
779	setup a frame buffer for us to use, just add :
780	boot_serial=YES
781	boot_multicons=YES
782	in /boot/loader.conf
783	For Raspberry Pi 3 (RPI) users, this is needed even if you don't have
784	an screen connected as the firmware will setup a frame buffer are that
785	u-boot will expose as an EFI frame buffer.
786
78720180719:
788	New uid:gid added, ntpd:ntpd (123:123).  Be sure to run mergemaster
789	or take steps to update /etc/passwd before doing installworld on
790	existing systems.  Do not skip the "mergemaster -Fp" step before
791	installworld, as described in the update procedures near the bottom
792	of this document.  Also, rc.d/ntpd now starts ntpd(8) as user ntpd
793	if the new mac_ntpd(4) policy is available, unless ntpd_flags or
794	the ntp config file contain options that change file/dir locations.
795	When such options (e.g., "statsdir" or "crypto") are used, ntpd can
796	still be run as non-root by setting ntpd_user=ntpd in rc.conf, after
797	taking steps to ensure that all required files/dirs are accessible
798	by the ntpd user.
799
80020180717:
801	Big endian arm support has been removed.
802
80320180711:
804	The static environment setup in kernel configs is no longer mutually
805	exclusive with the loader(8) environment by default.  In order to
806	restore the previous default behavior of disabling the loader(8)
807	environment if a static environment is present, you must specify
808	loader_env.disabled=1 in the static environment.
809
81020180705:
811	The ABI of syscalls used by management tools like sockstat and
812	netstat has been broken to allow 32-bit binaries to work on
813	64-bit kernels without modification.  These programs will need
814	to match the kernel in order to function.  External programs may
815	require minor modifications to accommodate a change of type in
816	structures from pointers to 64-bit virtual addresses.
817
81820180702:
819	On i386 and amd64 atomics are now inlined. Out of tree modules using
820	atomics will need to be rebuilt.
821
82220180701:
823	The '%I' format in the kern.corefile sysctl limits the number of
824	core files that a process can generate to the number stored in the
825	debug.ncores sysctl. The '%I' format is replaced by the single digit
826	index. Previously, if all indexes were taken the kernel would overwrite
827	only a core file with the highest index in a filename.
828	Currently the system will create a new core file if there is a free
829	index or if all slots are taken it will overwrite the oldest one.
830
83120180630:
832	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
833	6.0.1.  Please see the 20141231 entry below for information about
834	prerequisites and upgrading, if you are not already using clang 3.5.0
835	or higher.
836
83720180628:
838	r335753 introduced a new quoting method. However, etc/devd/devmatch.conf
839	needed to be changed to work with it. This change was made with r335763
840	and requires a mergemaster / etcupdate / etc to update the installed
841	file.
842
84320180612:
844	r334930 changed the interface between the NFS modules, so they all
845	need to be rebuilt.  r335018 did a __FreeBSD_version bump for this.
846
84720180530:
848	As of r334391 lld is the default amd64 system linker; it is installed
849	as /usr/bin/ld.  Kernel build workarounds (see 20180510 entry) are no
850	longer necessary.
851
85220180530:
853	The kernel / userland interface for devinfo changed, so you'll
854	need a new kernel and userland as a pair for it to work (rebuilding
855	lib/libdevinfo is all that's required). devinfo and devmatch will
856	not work, but everything else will when there's a mismatch.
857
85820180523:
859	The on-disk format for hwpmc callchain records has changed to include
860	threadid corresponding to a given record. This changes the field offsets
861	and thus requires that libpmcstat be rebuilt before using a kernel
862	later than r334108.
863
86420180517:
865	The vxge(4) driver has been removed.  This driver was introduced into
866	HEAD one week before the Exar left the Ethernet market and is not
867	known to be used.  If you have device vxge in your kernel config file
868	it must be removed.
869
87020180510:
871	The amd64 kernel now requires a ld that supports ifunc to produce a
872	working kernel, either lld or a newer binutils. lld is built by default
873	on amd64, and the 'buildkernel' target uses it automatically. However,
874	it is not the default linker, so building the kernel the traditional
875	way requires LD=ld.lld on the command line (or LD=/usr/local/bin/ld for
876	binutils port/package). lld will soon be default, and this requirement
877	will go away.
878
879	NOTE: As of r334391 lld is the default system linker on amd64, and no
880	workaround is necessary.
881
88220180508:
883	The nxge(4) driver has been removed.  This driver was for PCI-X 10g
884	cards made by s2io/Neterion.  The company was acquired by Exar and
885	no longer sells or supports Ethernet products.  If you have device
886	nxge in your kernel config file it must be removed.
887
88820180504:
889	The tz database (tzdb) has been updated to 2018e.  This version more
890	correctly models time stamps in time zones with negative DST such as
891	Europe/Dublin (from 1971 on), Europe/Prague (1946/7), and
892	Africa/Windhoek (1994/2017).  This does not affect the UT offsets, only
893	time zone abbreviations and the tm_isdst flag.
894
89520180502:
896	The ixgb(4) driver has been removed.  This driver was for an early and
897	uncommon legacy PCI 10GbE for a single ASIC, Intel 82597EX. Intel
898	quickly shifted to the long lived ixgbe family.  If you have device
899	ixgb in your kernel config file it must be removed.
900
90120180501:
902	The lmc(4) driver has been removed.  This was a WAN interface
903	card that was already reportedly rare in 2003, and had an ambiguous
904	license.  If you have device lmc in your kernel config file it must
905	be removed.
906
90720180413:
908	Support for Arcnet networks has been removed.  If you have device
909	arcnet or device cm in your kernel config file they must be
910	removed.
911
91220180411:
913	Support for FDDI networks has been removed.  If you have device
914	fddi or device fpa in your kernel config file they must be
915	removed.
916
91720180406:
918	In addition to supporting RFC 3164 formatted messages, the
919	syslogd(8) service is now capable of parsing RFC 5424 formatted
920	log messages. The main benefit of using RFC 5424 is that clients
921	may now send log messages with timestamps containing year numbers,
922	microseconds and time zone offsets.
923
924	Similarly, the syslog(3) C library function has been altered to
925	send RFC 5424 formatted messages to the local system logging
926	daemon. On systems using syslogd(8), this change should have no
927	negative impact, as long as syslogd(8) and the C library are
928	updated at the same time. On systems using a different system
929	logging daemon, it may be necessary to make configuration
930	adjustments, depending on the software used.
931
932	When using syslog-ng, add the 'syslog-protocol' flag to local
933	input sources to enable parsing of RFC 5424 formatted messages:
934
935		source src {
936			unix-dgram("/var/run/log" flags(syslog-protocol));
937		}
938
939	When using rsyslog, disable the 'SysSock.UseSpecialParser' option
940	of the 'imuxsock' module to let messages be processed by the
941	regular RFC 3164/5424 parsing pipeline:
942
943		module(load="imuxsock" SysSock.UseSpecialParser="off")
944
945	Do note that these changes only affect communication between local
946	applications and syslogd(8). The format that syslogd(8) uses to
947	store messages on disk or forward messages to other systems
948	remains unchanged. syslogd(8) still uses RFC 3164 for these
949	purposes. Options to customize this behaviour will be added in the
950	future. Utilities that process log files stored in /var/log are
951	thus expected to continue to function as before.
952
953	__FreeBSD_version has been incremented to 1200061 to denote this
954	change.
955
95620180328:
957	Support for token ring networks has been removed. If you
958	have "device token" in your kernel config you should remove
959	it. No device drivers supported token ring.
960
96120180323:
962	makefs was modified to be able to tag ISO9660 El Torito boot catalog
963	entries as EFI instead of overloading the i386 tag as done previously.
964	The amd64 mkisoimages.sh script used to build amd64 ISO images for
965	release was updated to use this. This may mean that makefs must be
966	updated before "make cdrom" can be run in the release directory. This
967	should be as simple as:
968
969		$ cd $SRCDIR/usr.sbin/makefs
970		$ make depend all install
971
97220180212:
973	FreeBSD boot loader enhanced with Lua scripting. It's purely opt-in for
974	now by building WITH_LOADER_LUA and WITHOUT_FORTH in /etc/src.conf.
975	Co-existence for the transition period will come shortly. Booting is a
976	complex environment and test coverage for Lua-enabled loaders has been
977	thin, so it would be prudent to assume it might not work and make
978	provisions for backup boot methods.
979
98020180211:
981	devmatch functionality has been turned on in devd. It will automatically
982	load drivers for unattached devices. This may cause unexpected drivers
983	to be loaded. Please report any problems to current@ and
984	imp@freebsd.org.
985
98620180114:
987	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
988	6.0.0.  Please see the 20141231 entry below for information about
989	prerequisites and upgrading, if you are not already using clang 3.5.0
990	or higher.
991
99220180110:
993	LLVM's lld linker is now used as the FreeBSD/amd64 bootstrap linker.
994	This means it is used to link the kernel and userland libraries and
995	executables, but is not yet installed as /usr/bin/ld by default.
996
997	To revert to ld.bfd as the bootstrap linker, in /etc/src.conf set
998	WITHOUT_LLD_BOOTSTRAP=yes
999
100020180110:
1001	On i386, pmtimer has been removed. Its functionality has been folded
1002	into apm. It was a no-op on ACPI in current for a while now (but was
1003	still needed on i386 in FreeBSD 11 and earlier). Users may need to
1004	remove it from kernel config files.
1005
100620180104:
1007	The use of RSS hash from the network card aka flowid has been
1008	disabled by default for lagg(4) as it's currently incompatible with
1009	the lacp and loadbalance protocols.
1010
1011	This can be re-enabled by setting the following in loader.conf:
1012	net.link.lagg.default_use_flowid="1"
1013
101420180102:
1015	The SW_WATCHDOG option is no longer necessary to enable the
1016	hardclock-based software watchdog if no hardware watchdog is
1017	configured. As before, SW_WATCHDOG will cause the software
1018	watchdog to be enabled even if a hardware watchdog is configured.
1019
102020171215:
1021	r326887 fixes the issue described in the 20171214 UPDATING entry.
1022	r326888 flips the switch back to building GELI support always.
1023
102420171214:
1025	r362593 broke ZFS + GELI support for reasons unknown. However,
1026	it also broke ZFS support generally, so GELI has been turned off
1027	by default as the lesser evil in r326857. If you boot off ZFS and/or
1028	GELI, it might not be a good time to update.
1029
103020171125:
1031	PowerPC users must update loader(8) by rebuilding world before
1032	installing a new kernel, as the protocol connecting them has
1033	changed. Without the update, loader metadata will not be passed
1034	successfully to the kernel and users will have to enter their
1035	root partition at the kernel mountroot prompt to continue booting.
1036	Newer versions of loader can boot old kernels without issue.
1037
103820171110:
1039	The LOADER_FIREWIRE_SUPPORT build variable as been renamed to
1040	WITH/OUT_LOADER_FIREWIRE. LOADER_{NO_,}GELI_SUPPORT has been renamed
1041	to WITH/OUT_LOADER_GELI.
1042
104320171106:
1044	The naive and non-compliant support of posix_fallocate(2) in ZFS
1045	has been removed as of r325320.  The system call now returns EINVAL
1046	when used on a ZFS file.  Although the new behavior complies with the
1047	standard, some consumers are not prepared to cope with it.
1048	One known victim is lld prior to r325420.
1049
105020171102:
1051	Building in a FreeBSD src checkout will automatically create object
1052	directories now rather than store files in the current directory if
1053	'make obj' was not ran.  Calling 'make obj' is no longer necessary.
1054	This feature can be disabled by setting WITHOUT_AUTO_OBJ=yes in
1055	/etc/src-env.conf (not /etc/src.conf), or passing the option in the
1056	environment.
1057
105820171101:
1059	The default MAKEOBJDIR has changed from /usr/obj/<srcdir> for native
1060	builds, and /usr/obj/<arch>/<srcdir> for cross-builds, to a unified
1061	/usr/obj/<srcdir>/<arch>.  This behavior can be changed to the old
1062	format by setting WITHOUT_UNIFIED_OBJDIR=yes in /etc/src-env.conf,
1063	the environment, or with -DWITHOUT_UNIFIED_OBJDIR when building.
1064	The UNIFIED_OBJDIR option is a transitional feature that will be
1065	removed for 12.0 release; please migrate to the new format for any
1066	tools by looking up the OBJDIR used by 'make -V .OBJDIR' means rather
1067	than hardcoding paths.
1068
106920171028:
1070	The native-xtools target no longer installs the files by default to the
1071	OBJDIR.  Use the native-xtools-install target with a DESTDIR to install
1072	to ${DESTDIR}/${NXTP} where NXTP defaults to /nxb-bin.
1073
107420171021:
1075	As part of the boot loader infrastructure cleanup, LOADER_*_SUPPORT
1076	options are changing from controlling the build if defined / undefined
1077	to controlling the build with explicit 'yes' or 'no' values. They will
1078	shift to WITH/WITHOUT options to match other options in the system.
1079
108020171010:
1081	libstand has turned into a private library for sys/boot use only.
1082	It is no longer supported as a public interface outside of sys/boot.
1083
108420171005:
1085	The arm port has split armv6 into armv6 and armv7. armv7 is now
1086	a valid TARGET_ARCH/MACHINE_ARCH setting. If you have an armv7 system
1087	and are running a kernel from before r324363, you will need to add
1088	MACHINE_ARCH=armv7 to 'make buildworld' to do a native build.
1089
109020171003:
1091	When building multiple kernels using KERNCONF, non-existent KERNCONF
1092	files will produce an error and buildkernel will fail. Previously
1093	missing KERNCONF files silently failed giving no indication as to
1094	why, only to subsequently discover during installkernel that the
1095	desired kernel was never built in the first place.
1096
109720170912:
1098	The default serial number format for CTL LUNs has changed.  This will
1099	affect users who use /dev/diskid/* device nodes, or whose FibreChannel
1100	or iSCSI clients care about their LUNs' serial numbers.  Users who
1101	require serial number stability should hardcode serial numbers in
1102	/etc/ctl.conf .
1103
110420170912:
1105	For 32-bit arm compiled for hard-float support, soft-floating point
1106	binaries now always get their shared libraries from
1107	LD_SOFT_LIBRARY_PATH (in the past, this was only used if
1108	/usr/libsoft also existed). Only users with a hard-float ld.so, but
1109	soft-float everything else should be affected.
1110
111120170826:
1112	The geli password typed at boot is now hidden.  To restore the previous
1113	behavior, see geli(8) for configuration options.
1114
111520170825:
1116	Move PMTUD blackhole counters to TCPSTATS and remove them from bare
1117	sysctl values.  Minor nit, but requires a rebuild of both world/kernel
1118	to complete.
1119
112020170814:
1121	"make check" behavior (made in ^/head@r295380) has been changed to
1122	execute from a limited sandbox, as opposed to executing from
1123	${TESTSDIR}.
1124
1125	Behavioral changes:
1126	- The "beforecheck" and "aftercheck" targets are now specified.
1127	- ${CHECKDIR} (added in commit noted above) has been removed.
1128	- Legacy behavior can be enabled by setting
1129	  WITHOUT_MAKE_CHECK_USE_SANDBOX in src.conf(5) or the environment.
1130
1131	If the limited sandbox mode is enabled, "make check" will execute
1132	"make distribution", then install, execute the tests, and clean up the
1133	sandbox if successful.
1134
1135	The "make distribution" and "make install" targets are typically run as
1136	root to set appropriate permissions and ownership at installation time.
1137	The end-user should set "WITH_INSTALL_AS_USER" in src.conf(5) or the
1138	environment if executing "make check" with limited sandbox mode using
1139	an unprivileged user.
1140
114120170808:
1142	Since the switch to GPT disk labels, fsck for UFS/FFS has been
1143	unable to automatically find alternate superblocks. As of r322297,
1144	the information needed to find alternate superblocks has been
1145	moved to the end of the area reserved for the boot block.
1146	Filesystems created with a newfs of this vintage or later
1147	will create the recovery information. If you have a filesystem
1148	created prior to this change and wish to have a recovery block
1149	created for your filesystem, you can do so by running fsck in
1150	foreground mode (i.e., do not use the -p or -y options). As it
1151	starts, fsck will ask ``SAVE DATA TO FIND ALTERNATE SUPERBLOCKS''
1152	to which you should answer yes.
1153
115420170728:
1155	As of r321665, an NFSv4 server configuration that services
1156	Kerberos mounts or clients that do not support the uid/gid in
1157	owner/owner_group string capability, must explicitly enable
1158	the nfsuserd daemon by adding nfsuserd_enable="YES" to the
1159	machine's /etc/rc.conf file.
1160
116120170722:
1162	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 5.0.0.
1163	Please see the 20141231 entry below for information about prerequisites
1164	and upgrading, if you are not already using clang 3.5.0 or higher.
1165
116620170701:
1167	WITHOUT_RCMDS is now the default. Set WITH_RCMDS if you need the
1168	r-commands (rlogin, rsh, etc.) to be built with the base system.
1169
117020170625:
1171	The FreeBSD/powerpc platform now uses a 64-bit type for time_t.  This is
1172	a very major ABI incompatible change, so users of FreeBSD/powerpc must
1173	be careful when performing source upgrades.  It is best to run
1174	'make installworld' from an alternate root system, either a live
1175	CD/memory stick, or a temporary root partition.  Additionally, all ports
1176	must be recompiled.  powerpc64 is largely unaffected, except in the case
1177	of 32-bit compatibility.  All 32-bit binaries will be affected.
1178
117920170623:
1180	Forward compatibility for the "ino64" project have been committed. This
1181	will allow most new binaries to run on older kernels in a limited
1182	fashion.  This prevents many of the common foot-shooting actions in the
1183	upgrade as well as the limited ability to roll back the kernel across
1184	the ino64 upgrade. Complicated use cases may not work properly, though
1185	enough simpler ones work to allow recovery in most situations.
1186
118720170620:
1188	Switch back to the BSDL dtc (Device Tree Compiler). Set WITH_GPL_DTC
1189	if you require the GPL compiler.
1190
119120170618:
1192	The internal ABI used for communication between the NFS kernel modules
1193	was changed by r320085, so __FreeBSD_version was bumped to
1194	ensure all the NFS related modules are updated together.
1195
119620170617:
1197	The ABI of struct event was changed by extending the data
1198	member to 64bit and adding ext fields.  For upgrade, same
1199	precautions as for the entry 20170523 "ino64" must be
1200	followed.
1201
120220170531:
1203	The GNU roff toolchain has been removed from base. To render manpages
1204	which are not supported by mandoc(1), man(1) can fallback on GNU roff
1205	from ports (and recommends to install it).
1206	To render roff(7) documents, consider using GNU roff from ports or the
1207	heirloom doctools roff toolchain from ports via pkg install groff or
1208	via pkg install heirloom-doctools.
1209
121020170524:
1211	The ath(4) and ath_hal(4) modules now build piecemeal to allow for
1212	smaller runtime footprint builds.  This is useful for embedded systems
1213	which only require one chipset support.
1214
1215	If you load it as a module, make sure this is in /boot/loader.conf:
1216
1217	if_ath_load="YES"
1218
1219	This will load the HAL, all chip/RF backends and if_ath_pci.
1220	If you have if_ath_pci in /boot/loader.conf, ensure it is after
1221	if_ath or it will not load any HAL chipset support.
1222
1223	If you want to selectively load things (eg on ye cheape ARM/MIPS
1224	platforms where RAM is at a premium) you should:
1225
1226	* load ath_hal
1227	* load the chip modules in question
1228	* load ath_rate, ath_dfs
1229	* load ath_main
1230	* load if_ath_pci and/or if_ath_ahb depending upon your particular
1231	  bus bind type - this is where probe/attach is done.
1232
1233	For further comments/feedback, poke adrian@ .
1234
123520170523:
1236	The "ino64" 64-bit inode project has been committed, which extends
1237	a number of types to 64 bits.  Upgrading in place requires care and
1238	adherence to the documented upgrade procedure.
1239
1240	If using a custom kernel configuration ensure that the
1241	COMPAT_FREEBSD11 option is included (as during the upgrade the
1242	system will be running the ino64 kernel with the existing world).
1243
1244	For the safest in-place upgrade begin by removing previous build
1245	artifacts via "rm -rf /usr/obj/*".  Then, carefully follow the full
1246	procedure documented below under the heading "To rebuild everything and
1247	install it on the current system."  Specifically, a reboot is required
1248	after installing the new kernel before installing world. While an
1249	installworld normally works by accident from multiuser after rebooting
1250	the proper kernel, there are many cases where this will fail across this
1251	upgrade and installworld from single user is required.
1252
125320170424:
1254	The NATM framework including the en(4), fatm(4), hatm(4), and
1255	patm(4) devices has been removed.  Consumers should plan a
1256	migration before the end-of-life date for FreeBSD 11.
1257
125820170420:
1259	GNU diff has been replaced by a BSD licensed diff. Some features of GNU
1260	diff has not been implemented, if those are needed a newer version of
1261	GNU diff is available via the diffutils package under the gdiff name.
1262
126320170413:
1264	As of r316810 for ipfilter, keep frags is no longer assumed when
1265	keep state is specified in a rule. r316810 aligns ipfilter with
1266	documentation in man pages separating keep frags from keep state.
1267	This allows keep state to be specified without forcing keep frags
1268	and allows keep frags to be specified independently of keep state.
1269	To maintain previous behaviour, also specify keep frags with
1270	keep state (as documented in ipf.conf.5).
1271
127220170407:
1273	arm64 builds now use the base system LLD 4.0.0 linker by default,
1274	instead of requiring that the aarch64-binutils port or package be
1275	installed. To continue using aarch64-binutils, set
1276	CROSS_BINUTILS_PREFIX=/usr/local/aarch64-freebsd/bin .
1277
127820170405:
1279	The UDP optimization in entry 20160818 that added the sysctl
1280	net.inet.udp.require_l2_bcast has been reverted.  L2 broadcast
1281	packets will no longer be treated as L3 broadcast packets.
1282
128320170331:
1284	Binds and sends to the loopback addresses, IPv6 and IPv4, will now
1285	use any explicitly assigned loopback address available in the jail
1286	instead of using the first assigned address of the jail.
1287
128820170329:
1289	The ctl.ko module no longer implements the iSCSI target frontend:
1290	cfiscsi.ko does instead.
1291
1292	If building cfiscsi.ko as a kernel module, the module can be loaded
1293	via one of the following methods:
1294	- `cfiscsi_load="YES"` in loader.conf(5).
1295	- Add `cfiscsi` to `$kld_list` in rc.conf(5).
1296	- ctladm(8)/ctld(8), when compiled with iSCSI support
1297	  (`WITH_ISCSI=yes` in src.conf(5))
1298
1299	Please see cfiscsi(4) for more details.
1300
130120170316:
1302	The mmcsd.ko module now additionally depends on geom_flashmap.ko.
1303	Also, mmc.ko and mmcsd.ko need to be a matching pair built from the
1304	same source (previously, the dependency of mmcsd.ko on mmc.ko was
1305	missing, but mmcsd.ko now will refuse to load if it is incompatible
1306	with mmc.ko).
1307
130820170315:
1309	The syntax of ipfw(8) named states was changed to avoid ambiguity.
1310	If you have used named states in the firewall rules, you need to modify
1311	them after installworld and before rebooting. Now named states must
1312	be prefixed with colon.
1313
131420170311:
1315	The old drm (sys/dev/drm/) drivers for i915 and radeon have been
1316	removed as the userland we provide cannot use them. The KMS version
1317	(sys/dev/drm2) supports the same hardware.
1318
131920170302:
1320	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 4.0.0.
1321	Please see the 20141231 entry below for information about prerequisites
1322	and upgrading, if you are not already using clang 3.5.0 or higher.
1323
132420170221:
1325	The code that provides support for ZFS .zfs/ directory functionality
1326	has been reimplemented.  It's not possible now to create a snapshot
1327	by mkdir under .zfs/snapshot/.  That should be the only user visible
1328	change.
1329
133020170216:
1331	EISA bus support has been removed. The WITH_EISA option is no longer
1332	valid.
1333
133420170215:
1335	MCA bus support has been removed.
1336
133720170127:
1338	The WITH_LLD_AS_LD / WITHOUT_LLD_AS_LD build knobs have been renamed
1339	WITH_LLD_IS_LD / WITHOUT_LLD_IS_LD, for consistency with CLANG_IS_CC.
1340
134120170112:
1342	The EM_MULTIQUEUE kernel configuration option is deprecated now that
1343	the em(4) driver conforms to iflib specifications.
1344
134520170109:
1346	The igb(4), em(4) and lem(4) ethernet drivers are now implemented via
1347	IFLIB.  If you have a custom kernel configuration that excludes em(4)
1348	but you use igb(4), you need to re-add em(4) to your custom
1349	configuration.
1350
135120161217:
1352	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.9.1.
1353	Please see the 20141231 entry below for information about prerequisites
1354	and upgrading, if you are not already using clang 3.5.0 or higher.
1355
135620161124:
1357	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.9.0.
1358	Please see the 20141231 entry below for information about prerequisites
1359	and upgrading, if you are not already using clang 3.5.0 or higher.
1360
136120161119:
1362	The layout of the pmap structure has changed for powerpc to put the pmap
1363	statistics at the front for all CPU variations.  libkvm(3) and all tools
1364	that link against it need to be recompiled.
1365
136620161030:
1367	isl(4) and cyapa(4) drivers now require a new driver,
1368	chromebook_platform(4), to work properly on Chromebook-class hardware.
1369	On other types of hardware the drivers may need to be configured using
1370	device hints.  Please see the corresponding manual pages for details.
1371
137220161017:
1373	The urtwn(4) driver was merged into rtwn(4) and now consists of
1374	rtwn(4) main module + rtwn_usb(4) and rtwn_pci(4) bus-specific
1375	parts.
1376	Also, firmware for RTL8188CE was renamed due to possible name
1377	conflict (rtwnrtl8192cU(B) -> rtwnrtl8192cE(B))
1378
137920161015:
1380	GNU rcs has been removed from base.  It is available as packages:
1381	- rcs: Latest GPLv3 GNU rcs version.
1382	- rcs57: Copy of the latest version of GNU rcs (GPLv2) before it was
1383	removed from base.
1384
138520161008:
1386	Use of the cc_cdg, cc_chd, cc_hd, or cc_vegas congestion control
1387	modules now requires that the kernel configuration contain the
1388	TCP_HHOOK option. (This option is included in the GENERIC kernel.)
1389
139020161003:
1391	The WITHOUT_ELFCOPY_AS_OBJCOPY src.conf(5) knob has been retired.
1392	ELF Tool Chain's elfcopy is always installed as /usr/bin/objcopy.
1393
139420160924:
1395	Relocatable object files with the extension of .So have been renamed
1396	to use an extension of .pico instead.  The purpose of this change is
1397	to avoid a name clash with shared libraries on case-insensitive file
1398	systems.  On those file systems, foo.So is the same file as foo.so.
1399
140020160918:
1401	GNU rcs has been turned off by default.  It can (temporarily) be built
1402	again by adding WITH_RCS knob in src.conf.
1403	Otherwise, GNU rcs is available from packages:
1404	- rcs: Latest GPLv3 GNU rcs version.
1405	- rcs57: Copy of the latest version of GNU rcs (GPLv2) from base.
1406
140720160918:
1408	The backup_uses_rcs functionality has been removed from rc.subr.
1409
141020160908:
1411	The queue(3) debugging macro, QUEUE_MACRO_DEBUG, has been split into
1412	two separate components, QUEUE_MACRO_DEBUG_TRACE and
1413	QUEUE_MACRO_DEBUG_TRASH.  Define both for the original
1414	QUEUE_MACRO_DEBUG behavior.
1415
141620160824:
1417	r304787 changed some ioctl interfaces between the iSCSI userspace
1418	programs and the kernel.  ctladm, ctld, iscsictl, and iscsid must be
1419	rebuilt to work with new kernels.  __FreeBSD_version has been bumped
1420	to 1200005.
1421
142220160818:
1423	The UDP receive code has been updated to only treat incoming UDP
1424	packets that were addressed to an L2 broadcast address as L3
1425	broadcast packets.  It is not expected that this will affect any
1426	standards-conforming UDP application.  The new behaviour can be
1427	disabled by setting the sysctl net.inet.udp.require_l2_bcast to
1428	0.
1429
143020160818:
1431	Remove the openbsd_poll system call.
1432	__FreeBSD_version has been bumped because of this.
1433
143420160708:
1435	The stable/11 branch has been created from head@r302406.
1436
143720160622:
1438	The libc stub for the pipe(2) system call has been replaced with
1439	a wrapper that calls the pipe2(2) system call and the pipe(2)
1440	system call is now only implemented by the kernels that include
1441	"options COMPAT_FREEBSD10" in their config file (this is the
1442	default).  Users should ensure that this option is enabled in
1443	their kernel or upgrade userspace to r302092 before upgrading their
1444	kernel.
1445
144620160527:
1447	CAM will now strip leading spaces from SCSI disks' serial numbers.
1448	This will affect users who create UFS filesystems on SCSI disks using
1449	those disk's diskid device nodes.  For example, if /etc/fstab
1450	previously contained a line like
1451	"/dev/diskid/DISK-%20%20%20%20%20%20%20ABCDEFG0123456", you should
1452	change it to "/dev/diskid/DISK-ABCDEFG0123456".  Users of geom
1453	transforms like gmirror may also be affected.  ZFS users should
1454	generally be fine.
1455
145620160523:
1457	The bitstring(3) API has been updated with new functionality and
1458	improved performance.  But it is binary-incompatible with the old API.
1459	Objects built with the new headers may not be linked against objects
1460	built with the old headers.
1461
146220160520:
1463	The brk and sbrk functions have been removed from libc on arm64.
1464	Binutils from ports has been updated to not link to these
1465	functions and should be updated to the latest version before
1466	installing a new libc.
1467
146820160517:
1469	The armv6 port now defaults to hard float ABI. Limited support
1470	for running both hardfloat and soft float on the same system
1471	is available using the libraries installed with -DWITH_LIBSOFT.
1472	This has only been tested as an upgrade path for installworld
1473	and packages may fail or need manual intervention to run. New
1474	packages will be needed.
1475
1476	To update an existing self-hosted armv6hf system, you must add
1477	TARGET_ARCH=armv6 on the make command line for both the build
1478	and the install steps.
1479
148020160510:
1481	Kernel modules compiled outside of a kernel build now default to
1482	installing to /boot/modules instead of /boot/kernel.  Many kernel
1483	modules built this way (such as those in ports) already overrode
1484	KMODDIR explicitly to install into /boot/modules.  However,
1485	manually building and installing a module from /sys/modules will
1486	now install to /boot/modules instead of /boot/kernel.
1487
148820160414:
1489	The CAM I/O scheduler has been committed to the kernel. There should be
1490	no user visible impact. This does enable NCQ Trim on ada SSDs. While the
1491	list of known rogues that claim support for this but actually corrupt
1492	data is believed to be complete, be on the lookout for data
1493	corruption. The known rogue list is believed to be complete:
1494
1495		o Crucial MX100, M550 drives with MU01 firmware.
1496		o Micron M510 and M550 drives with MU01 firmware.
1497		o Micron M500 prior to MU07 firmware
1498		o Samsung 830, 840, and 850 all firmwares
1499		o FCCT M500 all firmwares
1500
1501	Crucial has firmware http://www.crucial.com/usa/en/support-ssd-firmware
1502	with working NCQ TRIM. For Micron branded drives, see your sales rep for
1503	updated firmware. Black listed drives will work correctly because these
1504	drives work correctly so long as no NCQ TRIMs are sent to them. Given
1505	this list is the same as found in Linux, it's believed there are no
1506	other rogues in the market place. All other models from the above
1507	vendors work.
1508
1509	To be safe, if you are at all concerned, you can quirk each of your
1510	drives to prevent NCQ from being sent by setting:
1511		kern.cam.ada.X.quirks="0x2"
1512	in loader.conf. If the drive requires the 4k sector quirk, set the
1513	quirks entry to 0x3.
1514
151520160330:
1516	The FAST_DEPEND build option has been removed and its functionality is
1517	now the one true way.  The old mkdep(1) style of 'make depend' has
1518	been removed.  See 20160311 for further details.
1519
152020160317:
1521	Resource range types have grown from unsigned long to uintmax_t.  All
1522	drivers, and anything using libdevinfo, need to be recompiled.
1523
152420160311:
1525	WITH_FAST_DEPEND is now enabled by default for in-tree and out-of-tree
1526	builds.  It no longer runs mkdep(1) during 'make depend', and the
1527	'make depend' stage can safely be skipped now as it is auto ran
1528	when building 'make all' and will generate all SRCS and DPSRCS before
1529	building anything else.  Dependencies are gathered at compile time with
1530	-MF flags kept in separate .depend files per object file.  Users should
1531	run 'make cleandepend' once if using -DNO_CLEAN to clean out older
1532	stale .depend files.
1533
153420160306:
1535	On amd64, clang 3.8.0 can now insert sections of type AMD64_UNWIND into
1536	kernel modules.  Therefore, if you load any kernel modules at boot time,
1537	please install the boot loaders after you install the kernel, but before
1538	rebooting, e.g.:
1539
1540	make buildworld
1541	make buildkernel KERNCONF=YOUR_KERNEL_HERE
1542	make installkernel KERNCONF=YOUR_KERNEL_HERE
1543	make -C sys/boot install
1544	<reboot in single user>
1545
1546	Then follow the usual steps, described in the General Notes section,
1547	below.
1548
154920160305:
1550	Clang, llvm, lldb and compiler-rt have been upgraded to 3.8.0.  Please
1551	see the 20141231 entry below for information about prerequisites and
1552	upgrading, if you are not already using clang 3.5.0 or higher.
1553
155420160301:
1555	The AIO subsystem is now a standard part of the kernel.  The
1556	VFS_AIO kernel option and aio.ko kernel module have been removed.
1557	Due to stability concerns, asynchronous I/O requests are only
1558	permitted on sockets and raw disks by default.  To enable
1559	asynchronous I/O requests on all file types, set the
1560	vfs.aio.enable_unsafe sysctl to a non-zero value.
1561
156220160226:
1563	The ELF object manipulation tool objcopy is now provided by the
1564	ELF Tool Chain project rather than by GNU binutils. It should be a
1565	drop-in replacement, with the addition of arm64 support. The
1566	(temporary) src.conf knob WITHOUT_ELFCOPY_AS_OBJCOPY knob may be set
1567	to obtain the GNU version if necessary.
1568
156920160129:
1570	Building ZFS pools on top of zvols is prohibited by default.  That
1571	feature has never worked safely; it's always been prone to deadlocks.
1572	Using a zvol as the backing store for a VM guest's virtual disk will
1573	still work, even if the guest is using ZFS.  Legacy behavior can be
1574	restored by setting vfs.zfs.vol.recursive=1.
1575
157620160119:
1577	The NONE and HPN patches has been removed from OpenSSH.  They are
1578	still available in the security/openssh-portable port.
1579
158020160113:
1581	With the addition of ypldap(8), a new _ypldap user is now required
1582	during installworld. "mergemaster -p" can be used to add the user
1583	prior to installworld, as documented in the handbook.
1584
158520151216:
1586	The tftp loader (pxeboot) now uses the option root-path directive. As a
1587	consequence it no longer looks for a pxeboot.4th file on the tftp
1588	server. Instead it uses the regular /boot infrastructure as with the
1589	other loaders.
1590
159120151211:
1592	The code to start recording plug and play data into the modules has
1593	been committed. While the old tools will properly build a new kernel,
1594	a number of warnings about "unknown metadata record 4" will be produced
1595	for an older kldxref. To avoid such warnings, make sure to rebuild
1596	the kernel toolchain (or world). Make sure that you have r292078 or
1597	later when trying to build 292077 or later before rebuilding.
1598
159920151207:
1600	Debug data files are now built by default with 'make buildworld' and
1601	installed with 'make installworld'. This facilitates debugging but
1602	requires more disk space both during the build and for the installed
1603	world. Debug files may be disabled by setting WITHOUT_DEBUG_FILES=yes
1604	in src.conf(5).
1605
160620151130:
1607	r291527 changed the internal interface between the nfsd.ko and
1608	nfscommon.ko modules. As such, they must both be upgraded to-gether.
1609	__FreeBSD_version has been bumped because of this.
1610
161120151108:
1612	Add support for unicode collation strings leads to a change of
1613	order of files listed by ls(1) for example. To get back to the old
1614	behaviour, set LC_COLLATE environment variable to "C".
1615
1616	Databases administrators will need to reindex their databases given
1617	collation results will be different.
1618
1619	Due to a bug in install(1) it is recommended to remove the ancient
1620	locales before running make installworld.
1621
1622	rm -rf /usr/share/locale/*
1623
162420151030:
1625	The OpenSSL has been upgraded to 1.0.2d.  Any binaries requiring
1626	libcrypto.so.7 or libssl.so.7 must be recompiled.
1627
162820151020:
1629	Qlogic 24xx/25xx firmware images were updated from 5.5.0 to 7.3.0.
1630	Kernel modules isp_2400_multi and isp_2500_multi were removed and
1631	should be replaced with isp_2400 and isp_2500 modules respectively.
1632
163320151017:
1634	The build previously allowed using 'make -n' to not recurse into
1635	sub-directories while showing what commands would be executed, and
1636	'make -n -n' to recursively show commands.  Now 'make -n' will recurse
1637	and 'make -N' will not.
1638
163920151012:
1640	If you specify SENDMAIL_MC or SENDMAIL_CF in make.conf, mergemaster
1641	and etcupdate will now use this file. A custom sendmail.cf is now
1642	updated via this mechanism rather than via installworld.  If you had
1643	excluded sendmail.cf in mergemaster.rc or etcupdate.conf, you may
1644	want to remove the exclusion or change it to "always install".
1645	/etc/mail/sendmail.cf is now managed the same way regardless of
1646	whether SENDMAIL_MC/SENDMAIL_CF is used.  If you are not using
1647	SENDMAIL_MC/SENDMAIL_CF there should be no change in behavior.
1648
164920151011:
1650	Compatibility shims for legacy ATA device names have been removed.
1651	It includes ATA_STATIC_ID kernel option, kern.cam.ada.legacy_aliases
1652	and kern.geom.raid.legacy_aliases loader tunables, kern.devalias.*
1653	environment variables, /dev/ad* and /dev/ar* symbolic links.
1654
165520151006:
1656	Clang, llvm, lldb, compiler-rt and libc++ have been upgraded to 3.7.0.
1657	Please see the 20141231 entry below for information about prerequisites
1658	and upgrading, if you are not already using clang 3.5.0 or higher.
1659
166020150924:
1661	Kernel debug files have been moved to /usr/lib/debug/boot/kernel/,
1662	and renamed from .symbols to .debug. This reduces the size requirements
1663	on the boot partition or file system and provides consistency with
1664	userland debug files.
1665
1666	When using the supported kernel installation method the
1667	/usr/lib/debug/boot/kernel directory will be renamed (to kernel.old)
1668	as is done with /boot/kernel.
1669
1670	Developers wishing to maintain the historical behavior of installing
1671	debug files in /boot/kernel/ can set KERN_DEBUGDIR="" in src.conf(5).
1672
167320150827:
1674	The wireless drivers had undergone changes that remove the 'parent
1675	interface' from the ifconfig -l output. The rc.d network scripts
1676	used to check presence of a parent interface in the list, so old
1677	scripts would fail to start wireless networking. Thus, etcupdate(3)
1678	or mergemaster(8) run is required after kernel update, to update your
1679	rc.d scripts in /etc.
1680
168120150827:
1682	pf no longer supports 'scrub fragment crop' or 'scrub fragment drop-ovl'
1683	These configurations are now automatically interpreted as
1684	'scrub fragment reassemble'.
1685
168620150817:
1687	Kernel-loadable modules for the random(4) device are back. To use
1688	them, the kernel must have
1689
1690	device	random
1691	options	RANDOM_LOADABLE
1692
1693	kldload(8) can then be used to load random_fortuna.ko
1694	or random_yarrow.ko. Please note that due to the indirect
1695	function calls that the loadable modules need to provide,
1696	the build-in variants will be slightly more efficient.
1697
1698	The random(4) kernel option RANDOM_DUMMY has been retired due to
1699	unpopularity. It was not all that useful anyway.
1700
170120150813:
1702	The WITHOUT_ELFTOOLCHAIN_TOOLS src.conf(5) knob has been retired.
1703	Control over building the ELF Tool Chain tools is now provided by
1704	the WITHOUT_TOOLCHAIN knob.
1705
170620150810:
1707	The polarity of Pulse Per Second (PPS) capture events with the
1708	uart(4) driver has been corrected.  Prior to this change the PPS
1709	"assert" event corresponded to the trailing edge of a positive PPS
1710	pulse and the "clear" event was the leading edge of the next pulse.
1711
1712	As the width of a PPS pulse in a typical GPS receiver is on the
1713	order of 1 millisecond, most users will not notice any significant
1714	difference with this change.
1715
1716	Anyone who has compensated for the historical polarity reversal by
1717	configuring a negative offset equal to the pulse width will need to
1718	remove that workaround.
1719
172020150809:
1721	The default group assigned to /dev/dri entries has been changed
1722	from 'wheel' to 'video' with the id of '44'. If you want to have
1723	access to the dri devices please add yourself to the video group
1724	with:
1725
1726	# pw groupmod video -m $USER
1727
172820150806:
1729	The menu.rc and loader.rc files will now be replaced during
1730	upgrades. Please migrate local changes to menu.rc.local and
1731	loader.rc.local instead.
1732
173320150805:
1734	GNU Binutils versions of addr2line, c++filt, nm, readelf, size,
1735	strings and strip have been removed. The src.conf(5) knob
1736	WITHOUT_ELFTOOLCHAIN_TOOLS no longer provides the binutils tools.
1737
173820150728:
1739	As ZFS requires more kernel stack pages than is the default on some
1740	architectures e.g. i386, it now warns if KSTACK_PAGES is less than
1741	ZFS_MIN_KSTACK_PAGES (which is 4 at the time of writing).
1742
1743	Please consider using 'options KSTACK_PAGES=X' where X is greater
1744	than or equal to ZFS_MIN_KSTACK_PAGES i.e. 4 in such configurations.
1745
174620150706:
1747	sendmail has been updated to 8.15.2.  Starting with FreeBSD 11.0
1748	and sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
1749	default, i.e., they will not contain "::".  For example, instead
1750	of ::1, it will be 0:0:0:0:0:0:0:1.  This permits a zero subnet
1751	to have a more specific match, such as different map entries for
1752	IPv6:0:0 vs IPv6:0.  This change requires that configuration
1753	data (including maps, files, classes, custom ruleset, etc.) must
1754	use the same format, so make certain such configuration data is
1755	upgrading.  As a very simple check search for patterns like
1756	'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.  To return to the old
1757	behavior, set the m4 option confUSE_COMPRESSED_IPV6_ADDRESSES or
1758	the cf option UseCompressedIPv6Addresses.
1759
176020150630:
1761	The default kernel entropy-processing algorithm is now
1762	Fortuna, replacing Yarrow.
1763
1764	Assuming you have 'device random' in your kernel config
1765	file, the configurations allow a kernel option to override
1766	this default. You may choose *ONE* of:
1767
1768	options	RANDOM_YARROW	# Legacy /dev/random algorithm.
1769	options	RANDOM_DUMMY	# Blocking-only driver.
1770
1771	If you have neither, you get Fortuna.  For most people,
1772	read no further, Fortuna will give a /dev/random that works
1773	like it always used to, and the difference will be irrelevant.
1774
1775	If you remove 'device random', you get *NO* kernel-processed
1776	entropy at all. This may be acceptable to folks building
1777	embedded systems, but has complications. Carry on reading,
1778	and it is assumed you know what you need.
1779
1780	*PLEASE* read random(4) and random(9) if you are in the
1781	habit of tweaking kernel configs, and/or if you are a member
1782	of the embedded community, wanting specific and not-usual
1783	behaviour from your security subsystems.
1784
1785	NOTE!! If you use RANDOM_DUMMY and/or have no 'device
1786	random', you will NOT have a functioning /dev/random, and
1787	many cryptographic features will not work, including SSH.
1788	You may also find strange behaviour from the random(3) set
1789	of library functions, in particular sranddev(3), srandomdev(3)
1790	and arc4random(3). The reason for this is that the KERN_ARND
1791	sysctl only returns entropy if it thinks it has some to
1792	share, and with RANDOM_DUMMY or no 'device random' this
1793	will never happen.
1794
179520150623:
1796	An additional fix for the issue described in the 20150614 sendmail
1797	entry below has been committed in revision 284717.
1798
179920150616:
1800	FreeBSD's old make (fmake) has been removed from the system. It is
1801	available as the devel/fmake port or via pkg install fmake.
1802
180320150615:
1804	The fix for the issue described in the 20150614 sendmail entry
1805	below has been committed in revision 284436.  The work
1806	around described in that entry is no longer needed unless the
1807	default setting is overridden by a confDH_PARAMETERS configuration
1808	setting of '5' or pointing to a 512 bit DH parameter file.
1809
181020150614:
1811	ALLOW_DEPRECATED_ATF_TOOLS/ATFFILE support has been removed from
1812	atf.test.mk (included from bsd.test.mk). Please upgrade devel/atf
1813	and devel/kyua to version 0.20+ and adjust any calling code to work
1814	with Kyuafile and kyua.
1815
181620150614:
1817	The import of openssl to address the FreeBSD-SA-15:10.openssl
1818	security advisory includes a change which rejects handshakes
1819	with DH parameters below 768 bits.  sendmail releases prior
1820	to 8.15.2 (not yet released), defaulted to a 512 bit
1821	DH parameter setting for client connections.  To work around
1822	this interoperability, sendmail can be configured to use a
1823	2048 bit DH parameter by:
1824
1825	1. Edit /etc/mail/`hostname`.mc
1826	2. If a setting for confDH_PARAMETERS does not exist or
1827	   exists and is set to a string beginning with '5',
1828	   replace it with '2'.
1829	3. If a setting for confDH_PARAMETERS exists and is set to
1830	   a file path, create a new file with:
1831		openssl dhparam -out /path/to/file 2048
1832	4. Rebuild the .cf file:
1833		cd /etc/mail/; make; make install
1834	5. Restart sendmail:
1835		cd /etc/mail/; make restart
1836
1837	A sendmail patch is coming, at which time this file will be
1838	updated.
1839
184020150604:
1841	Generation of legacy formatted entries have been disabled by default
1842	in pwd_mkdb(8), as all base system consumers of the legacy formatted
1843	entries were converted to use the new format by default when the new,
1844	machine independent format have been added and supported since FreeBSD
1845	5.x.
1846
1847	Please see the pwd_mkdb(8) manual page for further details.
1848
184920150525:
1850	Clang and llvm have been upgraded to 3.6.1 release.  Please see the
1851	20141231 entry below for information about prerequisites and upgrading,
1852	if you are not already using 3.5.0 or higher.
1853
185420150521:
1855	TI platform code switched to using vendor DTS files and this update
1856	may break existing systems running on Beaglebone, Beaglebone Black,
1857	and Pandaboard:
1858
1859	- dtb files should be regenerated/reinstalled. Filenames are the
1860	  same but content is different now
1861	- GPIO addressing was changed, now each GPIO bank (32 pins per bank)
1862	  has its own /dev/gpiocX device, e.g. pin 121 on /dev/gpioc0 in old
1863	  addressing scheme is now pin 25 on /dev/gpioc3.
1864	- Pandaboard: /etc/ttys should be updated, serial console device is
1865	  now /dev/ttyu2, not /dev/ttyu0
1866
186720150501:
1868	soelim(1) from gnu/usr.bin/groff has been replaced by usr.bin/soelim.
1869	If you need the GNU extension from groff soelim(1), install groff
1870	from package: pkg install groff, or via ports: textproc/groff.
1871
187220150423:
1873	chmod, chflags, chown and chgrp now affect symlinks in -R mode as
1874	defined in symlink(7); previously symlinks were silently ignored.
1875
187620150415:
1877	The const qualifier has been removed from iconv(3) to comply with
1878	POSIX.  The ports tree is aware of this from r384038 onwards.
1879
188020150416:
1881	Libraries specified by LIBADD in Makefiles must have a corresponding
1882	DPADD_<lib> variable to ensure correct dependencies.  This is now
1883	enforced in src.libnames.mk.
1884
188520150324:
1886	From legacy ata(4) driver was removed support for SATA controllers
1887	supported by more functional drivers ahci(4), siis(4) and mvs(4).
1888	Kernel modules ataahci and ataadaptec were removed completely,
1889	replaced by ahci and mvs modules respectively.
1890
189120150315:
1892	Clang, llvm and lldb have been upgraded to 3.6.0 release.  Please see
1893	the 20141231 entry below for information about prerequisites and
1894	upgrading, if you are not already using 3.5.0 or higher.
1895
189620150307:
1897	The 32-bit PowerPC kernel has been changed to a position-independent
1898	executable. This can only be booted with a version of loader(8)
1899	newer than January 31, 2015, so make sure to update both world and
1900	kernel before rebooting.
1901
190220150217:
1903	If you are running a -CURRENT kernel since r273872 (Oct 30th, 2014),
1904	but before r278950, the RNG was not seeded properly.  Immediately
1905	upgrade the kernel to r278950 or later and regenerate any keys (e.g.
1906	ssh keys or openssl keys) that were generated w/ a kernel from that
1907	range.  This does not affect programs that directly used /dev/random
1908	or /dev/urandom.  All userland uses of arc4random(3) are affected.
1909
191020150210:
1911	The autofs(4) ABI was changed in order to restore binary compatibility
1912	with 10.1-RELEASE.  The automountd(8) daemon needs to be rebuilt to work
1913	with the new kernel.
1914
191520150131:
1916	The powerpc64 kernel has been changed to a position-independent
1917	executable. This can only be booted with a new version of loader(8),
1918	so make sure to update both world and kernel before rebooting.
1919
192020150118:
1921	Clang and llvm have been upgraded to 3.5.1 release.  This is a bugfix
1922	only release, no new features have been added.  Please see the 20141231
1923	entry below for information about prerequisites and upgrading, if you
1924	are not already using 3.5.0.
1925
192620150107:
1927	ELF tools addr2line, elfcopy (strip), nm, size, and strings are now
1928	taken from the ELF Tool Chain project rather than GNU binutils. They
1929	should be drop-in replacements, with the addition of arm64 support.
1930	The WITHOUT_ELFTOOLCHAIN_TOOLS= knob may be used to obtain the
1931	binutils tools, if necessary. See 20150805 for updated information.
1932
193320150105:
1934	The default Unbound configuration now enables remote control
1935	using a local socket.  Users who have already enabled the
1936	local_unbound service should regenerate their configuration
1937	by running "service local_unbound setup" as root.
1938
193920150102:
1940	The GNU texinfo and GNU info pages have been removed.
1941	To be able to view GNU info pages please install texinfo from ports.
1942
194320141231:
1944	Clang, llvm and lldb have been upgraded to 3.5.0 release.
1945
1946	As of this release, a prerequisite for building clang, llvm and lldb is
1947	a C++11 capable compiler and C++11 standard library.  This means that to
1948	be able to successfully build the cross-tools stage of buildworld, with
1949	clang as the bootstrap compiler, your system compiler or cross compiler
1950	should either be clang 3.3 or later, or gcc 4.8 or later, and your
1951	system C++ library should be libc++, or libdstdc++ from gcc 4.8 or
1952	later.
1953
1954	On any standard FreeBSD 10.x or 11.x installation, where clang and
1955	libc++ are on by default (that is, on x86 or arm), this should work out
1956	of the box.
1957
1958	On 9.x installations where clang is enabled by default, e.g. on x86 and
1959	powerpc, libc++ will not be enabled by default, so libc++ should be
1960	built (with clang) and installed first.  If both clang and libc++ are
1961	missing, build clang first, then use it to build libc++.
1962
1963	On 8.x and earlier installations, upgrade to 9.x first, and then follow
1964	the instructions for 9.x above.
1965
1966	Sparc64 and mips users are unaffected, as they still use gcc 4.2.1 by
1967	default, and do not build clang.
1968
1969	Many embedded systems are resource constrained, and will not be able to
1970	build clang in a reasonable time, or in some cases at all.  In those
1971	cases, cross building bootable systems on amd64 is a workaround.
1972
1973	This new version of clang introduces a number of new warnings, of which
1974	the following are most likely to appear:
1975
1976	-Wabsolute-value
1977
1978	This warns in two cases, for both C and C++:
1979	* When the code is trying to take the absolute value of an unsigned
1980	  quantity, which is effectively a no-op, and almost never what was
1981	  intended.  The code should be fixed, if at all possible.  If you are
1982	  sure that the unsigned quantity can be safely cast to signed, without
1983	  loss of information or undefined behavior, you can add an explicit
1984	  cast, or disable the warning.
1985
1986	* When the code is trying to take an absolute value, but the called
1987	  abs() variant is for the wrong type, which can lead to truncation.
1988	  If you want to disable the warning instead of fixing the code, please
1989	  make sure that truncation will not occur, or it might lead to unwanted
1990	  side-effects.
1991
1992	-Wtautological-undefined-compare and
1993	-Wundefined-bool-conversion
1994
1995	These warn when C++ code is trying to compare 'this' against NULL, while
1996	'this' should never be NULL in well-defined C++ code.  However, there is
1997	some legacy (pre C++11) code out there, which actively abuses this
1998	feature, which was less strictly defined in previous C++ versions.
1999
2000	Squid and openjdk do this, for example.  The warning can be turned off
2001	for C++98 and earlier, but compiling the code in C++11 mode might result
2002	in unexpected behavior; for example, the parts of the program that are
2003	unreachable could be optimized away.
2004
200520141222:
2006	The old NFS client and server (kernel options NFSCLIENT, NFSSERVER)
2007	kernel sources have been removed. The .h files remain, since some
2008	utilities include them. This will need to be fixed later.
2009	If "mount -t oldnfs ..." is attempted, it will fail.
2010	If the "-o" option on mountd(8), nfsd(8) or nfsstat(1) is used,
2011	the utilities will report errors.
2012
201320141121:
2014	The handling of LOCAL_LIB_DIRS has been altered to skip addition of
2015	directories to top level SUBDIR variable when their parent
2016	directory is included in LOCAL_DIRS.  Users with build systems with
2017	such hierarchies and without SUBDIR entries in the parent
2018	directory Makefiles should add them or add the directories to
2019	LOCAL_DIRS.
2020
202120141109:
2022	faith(4) and faithd(8) have been removed from the base system. Faith
2023	has been obsolete for a very long time.
2024
202520141104:
2026	vt(4), the new console driver, is enabled by default. It brings
2027	support for Unicode and double-width characters, as well as
2028	support for UEFI and integration with the KMS kernel video
2029	drivers.
2030
2031	You may need to update your console settings in /etc/rc.conf,
2032	most probably the keymap. During boot, /etc/rc.d/syscons will
2033	indicate what you need to do.
2034
2035	vt(4) still has issues and lacks some features compared to
2036	syscons(4). See the wiki for up-to-date information:
2037	  https://wiki.freebsd.org/Newcons
2038
2039	If you want to keep using syscons(4), you can do so by adding
2040	the following line to /boot/loader.conf:
2041	  kern.vty=sc
2042
204320141102:
2044	pjdfstest has been integrated into kyua as an opt-in test suite.
2045	Please see share/doc/pjdfstest/README for more details on how to
2046	execute it.
2047
204820141009:
2049	gperf has been removed from the base system for architectures
2050	that use clang. Ports that require gperf will obtain it from the
2051	devel/gperf port.
2052
205320140923:
2054	pjdfstest has been moved from tools/regression/pjdfstest to
2055	contrib/pjdfstest .
2056
205720140922:
2058	At svn r271982, The default linux compat kernel ABI has been adjusted
2059	to 2.6.18 in support of the linux-c6 compat ports infrastructure
2060	update.  If you wish to continue using the linux-f10 compat ports,
2061	add compat.linux.osrelease=2.6.16 to your local sysctl.conf.  Users are
2062	encouraged to update their linux-compat packages to linux-c6 during
2063	their next update cycle.
2064
206520140729:
2066	The ofwfb driver, used to provide a graphics console on PowerPC when
2067	using vt(4), no longer allows mmap() of all physical memory. This
2068	will prevent Xorg on PowerPC with some ATI graphics cards from
2069	initializing properly unless x11-servers/xorg-server is updated to
2070	1.12.4_8 or newer.
2071
207220140723:
2073	The xdev targets have been converted to using TARGET and
2074	TARGET_ARCH instead of XDEV and XDEV_ARCH.
2075
207620140719:
2077	The default unbound configuration has been modified to address
2078	issues with reverse lookups on networks that use private
2079	address ranges.  If you use the local_unbound service, run
2080	"service local_unbound setup" as root to regenerate your
2081	configuration, then "service local_unbound reload" to load the
2082	new configuration.
2083
208420140709:
2085	The GNU texinfo and GNU info pages are not built and installed
2086	anymore, WITH_INFO knob has been added to allow to built and install
2087	them again.
2088	UPDATE: see 20150102 entry on texinfo's removal
2089
209020140708:
2091	The GNU readline library is now an INTERNALLIB - that is, it is
2092	statically linked into consumers (GDB and variants) in the base
2093	system, and the shared library is no longer installed.  The
2094	devel/readline port is available for third party software that
2095	requires readline.
2096
209720140702:
2098	The Itanium architecture (ia64) has been removed from the list of
2099	known architectures. This is the first step in the removal of the
2100	architecture.
2101
210220140701:
2103	Commit r268115 has added NFSv4.1 server support, merged from
2104	projects/nfsv4.1-server.  Since this includes changes to the
2105	internal interfaces between the NFS related modules, a full
2106	build of the kernel and modules will be necessary.
2107	__FreeBSD_version has been bumped.
2108
210920140629:
2110	The WITHOUT_VT_SUPPORT kernel config knob has been renamed
2111	WITHOUT_VT.  (The other _SUPPORT knobs have a consistent meaning
2112	which differs from the behaviour controlled by this knob.)
2113
211420140619:
2115	Maximal length of the serial number in CTL was increased from 16 to
2116	64 chars, that breaks ABI.  All CTL-related tools, such as ctladm
2117	and ctld, need to be rebuilt to work with a new kernel.
2118
211920140606:
2120	The libatf-c and libatf-c++ major versions were downgraded to 0 and
2121	1 respectively to match the upstream numbers.  They were out of
2122	sync because, when they were originally added to FreeBSD, the
2123	upstream versions were not respected.  These libraries are private
2124	and not yet built by default, so renumbering them should be a
2125	non-issue.  However, unclean source trees will yield broken test
2126	programs once the operator executes "make delete-old-libs" after a
2127	"make installworld".
2128
2129	Additionally, the atf-sh binary was made private by moving it into
2130	/usr/libexec/.  Already-built shell test programs will keep the
2131	path to the old binary so they will break after "make delete-old"
2132	is run.
2133
2134	If you are using WITH_TESTS=yes (not the default), wipe the object
2135	tree and rebuild from scratch to prevent spurious test failures.
2136	This is only needed once: the misnumbered libraries and misplaced
2137	binaries have been added to OptionalObsoleteFiles.inc so they will
2138	be removed during a clean upgrade.
2139
214020140512:
2141	Clang and llvm have been upgraded to 3.4.1 release.
2142
214320140508:
2144	We bogusly installed src.opts.mk in /usr/share/mk. This file should
2145	be removed to avoid issues in the future (and has been added to
2146	ObsoleteFiles.inc).
2147
214820140505:
2149	/etc/src.conf now affects only builds of the FreeBSD src tree. In the
2150	past, it affected all builds that used the bsd.*.mk files. The old
2151	behavior was a bug, but people may have relied upon it. To get this
2152	behavior back, you can .include /etc/src.conf from /etc/make.conf
2153	(which is still global and isn't changed). This also changes the
2154	behavior of incremental builds inside the tree of individual
2155	directories. Set MAKESYSPATH to ".../share/mk" to do that.
2156	Although this has survived make universe and some upgrade scenarios,
2157	other upgrade scenarios may have broken. At least one form of
2158	temporary breakage was fixed with MAKESYSPATH settings for buildworld
2159	as well... In cases where MAKESYSPATH isn't working with this
2160	setting, you'll need to set it to the full path to your tree.
2161
2162	One side effect of all this cleaning up is that bsd.compiler.mk
2163	is no longer implicitly included by bsd.own.mk. If you wish to
2164	use COMPILER_TYPE, you must now explicitly include bsd.compiler.mk
2165	as well.
2166
216720140430:
2168	The lindev device has been removed since /dev/full has been made a
2169	standard device.  __FreeBSD_version has been bumped.
2170
217120140424:
2172	The knob WITHOUT_VI was added to the base system, which controls
2173	building ex(1), vi(1), etc. Older releases of FreeBSD required ex(1)
2174	in order to reorder files share/termcap and didn't build ex(1) as a
2175	build tool, so building/installing with WITH_VI is highly advised for
2176	build hosts for older releases.
2177
2178	This issue has been fixed in stable/9 and stable/10 in r277022 and
2179	r276991, respectively.
2180
218120140418:
2182	The YES_HESIOD knob has been removed. It has been obsolete for
2183	a decade. Please move to using WITH_HESIOD instead or your builds
2184	will silently lack HESIOD.
2185
218620140405:
2187	The uart(4) driver has been changed with respect to its handling
2188	of the low-level console. Previously the uart(4) driver prevented
2189	any process from changing the baudrate or the CLOCAL and HUPCL
2190	control flags. By removing the restrictions, operators can make
2191	changes to the serial console port without having to reboot.
2192	However, when getty(8) is started on the serial device that is
2193	associated with the low-level console, a misconfigured terminal
2194	line in /etc/ttys will now have a real impact.
2195	Before upgrading the kernel, make sure that /etc/ttys has the
2196	serial console device configured as 3wire without baudrate to
2197	preserve the previous behaviour. E.g:
2198	    ttyu0  "/usr/libexec/getty 3wire"  vt100  on  secure
2199
220020140306:
2201	Support for libwrap (TCP wrappers) in rpcbind was disabled by default
2202	to improve performance.  To re-enable it, if needed, run rpcbind
2203	with command line option -W.
2204
220520140226:
2206	Switched back to the GPL dtc compiler due to updates in the upstream
2207	dts files not being supported by the BSDL dtc compiler. You will need
2208	to rebuild your kernel toolchain to pick up the new compiler. Core dumps
2209	may result while building dtb files during a kernel build if you fail
2210	to do so. Set WITHOUT_GPL_DTC if you require the BSDL compiler.
2211
221220140216:
2213	Clang and llvm have been upgraded to 3.4 release.
2214
221520140216:
2216	The nve(4) driver has been removed.  Please use the nfe(4) driver
2217	for NVIDIA nForce MCP Ethernet adapters instead.
2218
221920140212:
2220	An ABI incompatibility crept into the libc++ 3.4 import in r261283.
2221	This could cause certain C++ applications using shared libraries built
2222	against the previous version of libc++ to crash.  The incompatibility
2223	has now been fixed, but any C++ applications or shared libraries built
2224	between r261283 and r261801 should be recompiled.
2225
222620140204:
2227	OpenSSH will now ignore errors caused by kernel lacking of Capsicum
2228	capability mode support.  Please note that enabling the feature in
2229	kernel is still highly recommended.
2230
223120140131:
2232	OpenSSH is now built with sandbox support, and will use sandbox as
2233	the default privilege separation method.  This requires Capsicum
2234	capability mode support in kernel.
2235
223620140128:
2237	The libelf and libdwarf libraries have been updated to newer
2238	versions from upstream. Shared library version numbers for
2239	these two libraries were bumped. Any ports or binaries
2240	requiring these two libraries should be recompiled.
2241	__FreeBSD_version is bumped to 1100006.
2242
224320140110:
2244	If a Makefile in a tests/ directory was auto-generating a Kyuafile
2245	instead of providing an explicit one, this would prevent such
2246	Makefile from providing its own Kyuafile in the future during
2247	NO_CLEAN builds.  This has been fixed in the Makefiles but manual
2248	intervention is needed to clean an objdir if you use NO_CLEAN:
2249	  # find /usr/obj -name Kyuafile | xargs rm -f
2250
225120131213:
2252	The behavior of gss_pseudo_random() for the krb5 mechanism
2253	has changed, for applications requesting a longer random string
2254	than produced by the underlying enctype's pseudo-random() function.
2255	In particular, the random string produced from a session key of
2256	enctype aes256-cts-hmac-sha1-96 or aes256-cts-hmac-sha1-96 will
2257	be different at the 17th octet and later, after this change.
2258	The counter used in the PRF+ construction is now encoded as a
2259	big-endian integer in accordance with RFC 4402.
2260	__FreeBSD_version is bumped to 1100004.
2261
226220131108:
2263	The WITHOUT_ATF build knob has been removed and its functionality
2264	has been subsumed into the more generic WITHOUT_TESTS.  If you were
2265	using the former to disable the build of the ATF libraries, you
2266	should change your settings to use the latter.
2267
226820131025:
2269	The default version of mtree is nmtree which is obtained from
2270	NetBSD.  The output is generally the same, but may vary
2271	slightly.  If you found you need identical output adding
2272	"-F freebsd9" to the command line should do the trick.  For the
2273	time being, the old mtree is available as fmtree.
2274
227520131014:
2276	libbsdyml has been renamed to libyaml and moved to /usr/lib/private.
2277	This will break ports-mgmt/pkg. Rebuild the port, or upgrade to pkg
2278	1.1.4_8 and verify bsdyml not linked in, before running "make
2279	delete-old-libs":
2280	  # make -C /usr/ports/ports-mgmt/pkg build deinstall install clean
2281	  or
2282	  # pkg install pkg; ldd /usr/local/sbin/pkg | grep bsdyml
2283
228420131010:
2285	The stable/10 branch has been created in subversion from head
2286	revision r256279.
2287
2288COMMON ITEMS:
2289
2290	General Notes
2291	-------------
2292	Sometimes, obscure build problems are the result of environment
2293	poisoning.  This can happen because the make utility reads its
2294	environment when searching for values for global variables.  To run
2295	your build attempts in an "environmental clean room", prefix all make
2296	commands with 'env -i '.  See the env(1) manual page for more details.
2297	Occasionally a build failure will occur with "make -j" due to a race
2298	condition.  If this happens try building again without -j, and please
2299	report a bug if it happens consistently.
2300
2301	When upgrading from one major version to another it is generally best to
2302	upgrade to the latest code in the currently installed branch first, then
2303	do an upgrade to the new branch. This is the best-tested upgrade path,
2304	and has the highest probability of being successful.  Please try this
2305	approach if you encounter problems with a major version upgrade.  Since
2306	the stable 4.x branch point, one has generally been able to upgrade from
2307	anywhere in the most recent stable branch to head / current (or even the
2308	last couple of stable branches). See the top of this file when there's
2309	an exception.
2310
2311	The update process will emit an error on an attempt to perform a build
2312	or install from a FreeBSD version below the earliest supported version.
2313	When updating from an older version the update should be performed one
2314	major release at a time, including running `make delete-old` at each
2315	step.
2316
2317	When upgrading a live system, having a root shell around before
2318	installing anything can help undo problems. Not having a root shell
2319	around can lead to problems if pam has changed too much from your
2320	starting point to allow continued authentication after the upgrade.
2321
2322	This file should be read as a log of events. When a later event changes
2323	information of a prior event, the prior event should not be deleted.
2324	Instead, a pointer to the entry with the new information should be
2325	placed in the old entry. Readers of this file should also sanity check
2326	older entries before relying on them blindly. Authors of new entries
2327	should write them with this in mind.
2328
2329	ZFS notes
2330	---------
2331	When upgrading the boot ZFS pool to a new version, always follow
2332	these two steps:
2333
2334	1.) recompile and reinstall the ZFS boot loader and boot block
2335	(this is part of "make buildworld" and "make installworld")
2336
2337	2.) update the ZFS boot block on your boot drive
2338
2339	The following example updates the ZFS boot block on the
2340	freebsd-boot partition of a GPT partitioned drive ada0:
2341	"gpart bootcode -p /boot/gptzfsboot -i $N ada0"
2342	The value $N will typically be 1 (if booting from BIOS) or 2 (if
2343	booting from EFI).
2344
2345	Non-boot pools do not need these updates.
2346
2347	To build a kernel
2348	-----------------
2349	If you are updating from a prior version of FreeBSD (even one just
2350	a few days old), you should follow this procedure.  It is the most
2351	failsafe as it uses a /usr/obj tree with a fresh mini-buildworld,
2352
2353	make kernel-toolchain
2354	make -DALWAYS_CHECK_MAKE buildkernel KERNCONF=YOUR_KERNEL_HERE
2355	make -DALWAYS_CHECK_MAKE installkernel KERNCONF=YOUR_KERNEL_HERE
2356
2357	To test a kernel once
2358	---------------------
2359	If you just want to boot a kernel once (because you are not sure
2360	if it works, or if you want to boot a known bad kernel to provide
2361	debugging information) run
2362	make installkernel KERNCONF=YOUR_KERNEL_HERE KODIR=/boot/testkernel
2363	nextboot -k testkernel
2364
2365	To rebuild everything and install it on the current system.
2366	-----------------------------------------------------------
2367	# Note: sometimes if you are running current you gotta do more than
2368	# is listed here if you are upgrading from a really old current.
2369
2370	<make sure you have good level 0 dumps>
2371	make buildworld
2372	make buildkernel KERNCONF=YOUR_KERNEL_HERE
2373	make installkernel KERNCONF=YOUR_KERNEL_HERE
2374							[1]
2375	<reboot in single user>				[3]
2376	mergemaster -Fp					[5]
2377	make installworld
2378	mergemaster -Fi					[4]
2379	make delete-old					[6]
2380	<reboot>
2381
2382	To cross-install current onto a separate partition
2383	--------------------------------------------------
2384	# In this approach we use a separate partition to hold
2385	# current's root, 'usr', and 'var' directories.   A partition
2386	# holding "/", "/usr" and "/var" should be about 2GB in
2387	# size.
2388
2389	<make sure you have good level 0 dumps>
2390	<boot into -stable>
2391	make buildworld
2392	make buildkernel KERNCONF=YOUR_KERNEL_HERE
2393	<maybe newfs current's root partition>
2394	<mount current's root partition on directory ${CURRENT_ROOT}>
2395	make installworld DESTDIR=${CURRENT_ROOT} -DDB_FROM_SRC
2396	make distribution DESTDIR=${CURRENT_ROOT} # if newfs'd
2397	make installkernel KERNCONF=YOUR_KERNEL_HERE DESTDIR=${CURRENT_ROOT}
2398	cp /etc/fstab ${CURRENT_ROOT}/etc/fstab 		   # if newfs'd
2399	<edit ${CURRENT_ROOT}/etc/fstab to mount "/" from the correct partition>
2400	<reboot into current>
2401	<do a "native" rebuild/install as described in the previous section>
2402	<maybe install compatibility libraries from ports/misc/compat*>
2403	<reboot>
2404
2405
2406	To upgrade in-place from stable to current
2407	----------------------------------------------
2408	<make sure you have good level 0 dumps>
2409	make buildworld					[9]
2410	make buildkernel KERNCONF=YOUR_KERNEL_HERE	[8]
2411	make installkernel KERNCONF=YOUR_KERNEL_HERE
2412							[1]
2413	<reboot in single user>				[3]
2414	mergemaster -Fp					[5]
2415	make installworld
2416	mergemaster -Fi					[4]
2417	make delete-old					[6]
2418	<reboot>
2419
2420	Make sure that you've read the UPDATING file to understand the
2421	tweaks to various things you need.  At this point in the life
2422	cycle of current, things change often and you are on your own
2423	to cope.  The defaults can also change, so please read ALL of
2424	the UPDATING entries.
2425
2426	Also, if you are tracking -current, you must be subscribed to
2427	freebsd-current@freebsd.org.  Make sure that before you update
2428	your sources that you have read and understood all the recent
2429	messages there.  If in doubt, please track -stable which has
2430	much fewer pitfalls.
2431
2432	[1] If you have third party modules, such as vmware, you should disable
2433	them at this point so they don't crash your system on
2434	reboot. Alternatively, you should rebuild all the modules you have in
2435	your system and install them as well.  If you are running -current, you
2436	should seriously consider placing all sources to all the modules for
2437	your system (or symlinks to them) in /usr/local/sys/modules so this
2438	happens automatically. If all your modules come from ports, then adding
2439	the port origin directories to PORTS_MODULES instead is also automatic
2440	and effective, eg:
2441	     PORTS_MODULES+=x11/nvidia-driver
2442
2443	[3] From the bootblocks, boot -s, and then do
2444		fsck -p
2445		mount -u /
2446		mount -a
2447		sh /etc/rc.d/zfs start	# mount zfs filesystem, if needed
2448		cd src			# full path to source
2449		adjkerntz -i		# if CMOS is wall time
2450	Also, when doing a major release upgrade, it is required that you boot
2451	into single user mode to do the installworld.
2452
2453	[4] Note: This step is non-optional.  Failure to do this step
2454	can result in a significant reduction in the functionality of the
2455	system.  Attempting to do it by hand is not recommended and those
2456	that pursue this avenue should read this file carefully, as well
2457	as the archives of freebsd-current and freebsd-hackers mailing lists
2458	for potential gotchas.  The -U option is also useful to consider.
2459	See mergemaster(8) for more information.
2460
2461	[5] Usually this step is a no-op.  However, from time to time
2462	you may need to do this if you get unknown user in the following
2463	step.  It never hurts to do it all the time.  You may need to
2464	install a new mergemaster (cd src/usr.sbin/mergemaster && make
2465	install) after the buildworld before this step if you last updated
2466	from current before 20130425 or from -stable before 20130430.
2467
2468	[6] This only deletes old files and directories. Old libraries
2469	can be deleted by "make delete-old-libs", but you have to make
2470	sure that no program is using those libraries anymore.
2471
2472	[8] The new kernel must be able to run existing binaries used by an
2473	installworld.  When upgrading across major versions, the new kernel's
2474	configuration must include the correct COMPAT_FREEBSD<n> option for
2475	existing binaries (e.g. COMPAT_FREEBSD11 to run 11.x binaries).  Failure
2476	to do so may leave you with a system that is hard to boot to recover. A
2477	GENERIC kernel will include suitable compatibility options to run
2478	binaries from older branches.  Note that the ability to run binaries
2479	from unsupported branches is not guaranteed.
2480
2481	Make sure that you merge any new devices from GENERIC since the
2482	last time you updated your kernel config file. Options also
2483	change over time, so you may need to adjust your custom kernels
2484	for these as well.
2485
2486	[9] If CPUTYPE is defined in your /etc/make.conf, make sure to use the
2487	"?=" instead of the "=" assignment operator, so that buildworld can
2488	override the CPUTYPE if it needs to.
2489
2490	MAKEOBJDIRPREFIX must be defined in an environment variable, and
2491	not on the command line, or in /etc/make.conf.  buildworld will
2492	warn if it is improperly defined.
2493FORMAT:
2494
2495This file contains a list, in reverse chronological order, of major
2496breakages in tracking -current.  It is not guaranteed to be a complete
2497list of such breakages, and only contains entries since September 23, 2011.
2498If you need to see UPDATING entries from before that date, you will need
2499to fetch an UPDATING file from an older FreeBSD release.
2500
2501Copyright information:
2502
2503Copyright 1998-2009 M. Warner Losh <imp@FreeBSD.org>
2504
2505Redistribution, publication, translation and use, with or without
2506modification, in full or in part, in any form or format of this
2507document are permitted without further permission from the author.
2508
2509THIS DOCUMENT IS PROVIDED BY WARNER LOSH ``AS IS'' AND ANY EXPRESS OR
2510IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
2511WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2512DISCLAIMED.  IN NO EVENT SHALL WARNER LOSH BE LIABLE FOR ANY DIRECT,
2513INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2514(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2515SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2516HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2517STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
2518IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
2519POSSIBILITY OF SUCH DAMAGE.
2520
2521Contact Warner Losh if you have any questions about your use of
2522this document.
2523
2524$FreeBSD$
2525