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UPDATING revision 1.304
      1 $NetBSD: UPDATING,v 1.304 2019/10/23 16:26:42 martin Exp $
      2 
      3 This file (UPDATING) is intended to be a brief reference to recent
      4 changes that might cause problems in the build process, and a guide for
      5 what to do if something doesn't work.
      6 
      7 For a more detailed description of the recommended way to build NetBSD
      8 using build.sh, see the BUILDING file.
      9 
     10 Note that much of the advice in this UPDATING file was written before
     11 build.sh existed.  Nevertheless, the advice here may be useful for
     12 working around specific problems with build.sh.
     13 
     14 Sections are marked with "^^^^^".  After the section on "Recent changes"
     15 are several sections containing more general information.
     16 
     17 See also: BUILDING, build.sh, Makefile.
     18 
     19 Recent changes:
     20 ^^^^^^^^^^^^^^^
     21 
     22 20191022:
     23 	Ports amd64 and aarch64 switched to GCC 8.3 by default.
     24 	In-place ("expert mode", build.sh -E) builds are not supported
     25 	when going from a GCC 7 userland to GCC 8. Do a regular
     26 	build to a different DESTDIR (or preferably: build.sh -U) at least
     27 	once and install sets, or download compt.{tar.xz,tgz} from the
     28 	daily builds and install that before doing the next in-place build.
     29 
     30 20191001:
     31 
     32 	GCC 8.3 was imported.  Builds of src/tools/gcc may fail if
     33 	old builds with GCC 7 output now uses GCC 8.  Clean this
     34 	directory, and also clean src/external/gpl3/gcc.
     35 
     36 20190903:
     37 
     38 	File with names that coincide with existing files' names on
     39 	case-insensitive file systems were inadvertently committed, for
     40 	radeon GPU firmware.  We cannot mark these as obsolete for
     41 	postinstall to fix, so if you updated src since 2019-08-26, and
     42 	ran build.sh distribution or ran build.sh release, you must
     43 	manually delete the following files in your DESTDIR (which is
     44 	usually $OBJDIR/destir.$ARCH), or from / if you have installed
     45 	them:
     46 
     47 		/libdata/firmware/radeon/bonaire_ce.bin
     48 		/libdata/firmware/radeon/bonaire_mc.bin
     49 		/libdata/firmware/radeon/bonaire_me.bin
     50 		/libdata/firmware/radeon/bonaire_mec.bin
     51 		/libdata/firmware/radeon/bonaire_pfp.bin
     52 		/libdata/firmware/radeon/bonaire_rlc.bin
     53 		/libdata/firmware/radeon/bonaire_sdma.bin
     54 		/libdata/firmware/radeon/bonaire_smc.bin
     55 		/libdata/firmware/radeon/bonaire_uvd.bin
     56 		/libdata/firmware/radeon/hainan_ce.bin
     57 		/libdata/firmware/radeon/hainan_mc.bin
     58 		/libdata/firmware/radeon/hainan_me.bin
     59 		/libdata/firmware/radeon/hainan_pfp.bin
     60 		/libdata/firmware/radeon/hainan_rlc.bin
     61 		/libdata/firmware/radeon/hainan_smc.bin
     62 		/libdata/firmware/radeon/hawaii_ce.bin
     63 		/libdata/firmware/radeon/hawaii_mc.bin
     64 		/libdata/firmware/radeon/hawaii_me.bin
     65 		/libdata/firmware/radeon/hawaii_mec.bin
     66 		/libdata/firmware/radeon/hawaii_pfp.bin
     67 		/libdata/firmware/radeon/hawaii_rlc.bin
     68 		/libdata/firmware/radeon/hawaii_sdma.bin
     69 		/libdata/firmware/radeon/hawaii_smc.bin
     70 		/libdata/firmware/radeon/kabini_ce.bin
     71 		/libdata/firmware/radeon/kabini_me.bin
     72 		/libdata/firmware/radeon/kabini_mec.bin
     73 		/libdata/firmware/radeon/kabini_pfp.bin
     74 		/libdata/firmware/radeon/kabini_rlc.bin
     75 		/libdata/firmware/radeon/kabini_sdma.bin
     76 		/libdata/firmware/radeon/kaveri_ce.bin
     77 		/libdata/firmware/radeon/kaveri_me.bin
     78 		/libdata/firmware/radeon/kaveri_mec.bin
     79 		/libdata/firmware/radeon/kaveri_mec2.bin
     80 		/libdata/firmware/radeon/kaveri_pfp.bin
     81 		/libdata/firmware/radeon/kaveri_rlc.bin
     82 		/libdata/firmware/radeon/kaveri_sdma.bin
     83 		/libdata/firmware/radeon/mullins_ce.bin
     84 		/libdata/firmware/radeon/mullins_me.bin
     85 		/libdata/firmware/radeon/mullins_mec.bin
     86 		/libdata/firmware/radeon/mullins_pfp.bin
     87 		/libdata/firmware/radeon/mullins_rlc.bin
     88 		/libdata/firmware/radeon/mullins_sdma.bin
     89 		/libdata/firmware/radeon/oland_ce.bin
     90 		/libdata/firmware/radeon/oland_mc.bin
     91 		/libdata/firmware/radeon/oland_me.bin
     92 		/libdata/firmware/radeon/oland_pfp.bin
     93 		/libdata/firmware/radeon/oland_rlc.bin
     94 		/libdata/firmware/radeon/oland_smc.bin
     95 		/libdata/firmware/radeon/pitcairn_ce.bin
     96 		/libdata/firmware/radeon/pitcairn_mc.bin
     97 		/libdata/firmware/radeon/pitcairn_me.bin
     98 		/libdata/firmware/radeon/pitcairn_pfp.bin
     99 		/libdata/firmware/radeon/pitcairn_rlc.bin
    100 		/libdata/firmware/radeon/pitcairn_smc.bin
    101 		/libdata/firmware/radeon/tahiti_ce.bin
    102 		/libdata/firmware/radeon/tahiti_mc.bin
    103 		/libdata/firmware/radeon/tahiti_me.bin
    104 		/libdata/firmware/radeon/tahiti_pfp.bin
    105 		/libdata/firmware/radeon/tahiti_rlc.bin
    106 		/libdata/firmware/radeon/tahiti_smc.bin
    107 		/libdata/firmware/radeon/verde_ce.bin
    108 		/libdata/firmware/radeon/verde_mc.bin
    109 		/libdata/firmware/radeon/verde_me.bin
    110 		/libdata/firmware/radeon/verde_pfp.bin
    111 		/libdata/firmware/radeon/verde_rlc.bin
    112 		/libdata/firmware/radeon/verde_smc.bin
    113 
    114 	We will re-import these radeon firmware images another way
    115 	later.
    116 
    117 20190727:
    118 	The uefi bootloader has gained tftp support and needs a clean
    119 	build. If you do update builds, manually clean its object
    120 	directory by something like:
    121 	cd sys/arch/i386/stand/efiboot && make clean
    122 
    123 20190723:
    124 	The jemalloc allocator in libc is now build without extended
    125 	debugging (for performance reasons). In update builds make sure
    126 	to rebuild it completly, by removing all affected object files,
    127 	including compat builds, something like:
    128 	cd /usr/obj && find . -type d -name jemalloc|xargs rm -rf
    129 
    130 20190207:
    131 	GCC 7 switched for many ports.  Update builds are likely to fail.
    132 
    133 20180924:
    134 	A newer OpenSSL version has been imported. If you are doing
    135 	update builds, make sure to remove all old obj dirs, like:
    136 	cd /usr/obj && find . -type d -name openssl | xargs rm -rf
    137 
    138 20180717:
    139 	On aarch64 int64_t and related types have changed from long long
    140 	to long. This requires recompiling all C++ binaries.
    141 
    142 20180713:
    143 	On amd64 and i386 static binaries are now build position
    144 	independend. This requires recompilation of all object
    145 	files used to create the crunched /rescue binary.
    146 	Clean the rescue directory in your obj directory before
    147 	doing an update build, otherwise linking will fail.
    148 
    149 20180414:
    150 	Existing binutils was migrated to binutils.old.  Manual
    151 	removal of tools/binutils objects directory may be required
    152 	to fix tools build failure.
    153 
    154 20180311:
    155 	bdftopcf was updated and may need cleaning in the
    156 	src/external/mit/xorg/tools/bdftopcf subdirectory if there are
    157 	link errors.
    158 
    159 20180212:
    160 	between OpenSSL and GCC updates, many things may fail to build.
    161 	any failure that looks like GCC or openssl is best handled by
    162 	a clean destdir and objdir.  Full cleandir and destdir deletion
    163 	is recommended if build failures occur.
    164 
    165 20171225:
    166 	removal of the vadvise syscall requires manual removal of all
    167 	associated files from the libc build object directory (including
    168 	the .depend files) - a command like:
    169 		cd $OBJ && find . -type d -name libc | xargs rm -rf
    170 	For architectures that support multiple "compat" binary targets,
    171 	you'll need to cleanup both the regular libc directory and the
    172 	compat ones (the above command will do that).
    173 
    174 20171010:
    175 	a change to the build structure of external/bsd/acpica/bin/iasl
    176 	means that its objdir (or *.d and .depend at least) might need
    177 	to be manually removed - or a build done once without -u.
    178 
    179 20170822:
    180 	a new version of GMP has been imported and probably
    181 	will break parts of builds related to themselves or GCC, both
    182 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    183 	and MPC objdirs or build once without -u.
    184 
    185 20170816:
    186 	a new version of MPFR and MPC have been imported and probably
    187 	will break parts of builds related to themselves or GCC, both
    188 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    189 	and MPC objdirs or build once without -u.
    190 
    191 20170402:
    192 	a new version of dhcpcd has been imported, which does not support
    193 	update builds from the previous version. Remove your
    194 	external/bsd/dhcpcd object dir or build once without -u.
    195 
    196 20170211:
    197 	a new terminfo database has been imported.
    198 	The structure of it has changed slightly from prior versions and
    199 	an updated tic tool is required.
    200 	If you build.sh, don't use -u
    201 
    202 20170207:
    203 	various arch dependent libc/exect.S files were removed
    204 	Either remove the obj directories (lib/libc and compat/amd64/i386/lib
    205 	if it exists) or do a clean build.
    206 	(This is a bug in the make system, it should be corrected without
    207 	human intervention, but isn't.)
    208 
    209 20170104:
    210 	xinput build options have changed.
    211 	Remove the obj directory (external/mit/xorg/bin/xinput)
    212 	if you build.sh -u
    213 
    214 20170103:
    215 	a new version of flex has been imported.
    216 	Remove the file from obj (external/bsd/flex)
    217 	if you build.sh -u
    218 
    219 20161014:
    220 	a new version of OpenSSL has been imported.
    221 	Remove the files from obj (crypto/external/bsd/openssl) 
    222 	if you build.sh -u
    223 
    224 20161009:
    225 	a new version of dhcpcd has been imported with slightly changed
    226 	build infrastructure. When doing a build.sh -u this requires
    227 	pruning the external/bsd/dhcpcd objdir.
    228 
    229 20160914:
    230 	i386, amd64, shark, ofppc and macppc have joined shark and x68k
    231 	ports in using xorg-server 1.18. This requires a clean destdir
    232 	and a clean objdir.
    233 
    234 20160527:
    235 	i386 needs a full cleandir or objdir deletion because PIE has
    236 	been enabled. (see the amd64 entry two down for further info)
    237 
    238 20160418:
    239 	libedit needs manual removal of all autogenerated files since
    240 	some of them are not autogenerated anymore. Remember that there
    241 	might be two copies of libedit if your platform builds "compat".
    242 
    243 20160410:
    244 	amd64 needs full "make cleandir" or deletion of objdir now that
    245 	PIE has been enabled for amd64.  PIE, or position-independent
    246 	executables, means all code, including executables and not just
    247 	shared libraries, is position-independent and hence able to be
    248 	relocated by ASLR, address space layout randomization.
    249 
    250 	The change was made in Makefile variables for compiler and
    251 	linker flags, for which make(1) does not record dependencies,
    252 	hence it is unable to detect that all .o files need rebuilding.
    253 
    254 	Partial rebuilds with some modified source files will likely
    255 	fail when linking executables, since the linker refuses to mix
    256 	position-independent code with position-dependent code in
    257 	position-independent executables:
    258 
    259 		.../x86_64--netbsd/bin/ld: foo.o: relocation R_X86_64_32 against `...' cannot be used when making a shared object; recompile with -fPIC
    260 
    261 20160401:
    262 	Ports switching to GCC 5.3 will need a full "make cleandir".
    263 	Some people have found that cleandir is not sufficient, so if
    264 	in doubt delete the entire object directory tree for gcc.
    265 
    266 20160306:
    267 	NetBSD's regexp implementation is now part of libnbcompat.
    268 	Nblex, nbm4, nbpax, nbsed use it and they may crash on
    269 	non-NetBSD hosts if linked with stale object files produced
    270 	while they included a non-NetBSD regex.h.
    271 	In any case, you should "make cleandir" at least these tools
    272 	before updating your toolchain.
    273 
    274 20160125:
    275 	Dtrace has been enabled by default on some architectures.
    276 	When doing an update build, make sure to clean the etc/mtree
    277 	object directory before starting the build - otherwise the
    278 	needed directories in destdir will not be created.
    279 	An easy way to do this is:
    280 	   cd src/etc/mtree && $TOOLDIR/bin/nbmake-$arch cleandir
    281 
    282 20150818:
    283 	New acpica requires "make cleandir" in src/external/bsd/acpica
    284 	again.
    285 
    286 20150413:
    287 	New acpica requires "make cleandir" and reinstalling yacc
    288 	in /usr/src/external/bsd/byacc and /usr/src/tools/yacc and
    289 	also "make cleandir" in /usr/src/external/bsd/acpica.
    290 
    291 20150404:
    292 	Lint changes require a full rebuild of the tool, so make
    293 	sure to build without -u option to build.sh, or manually
    294 	do a make cleandir in src/tools/lint1 and
    295 	src/usr.bin/xlint.
    296 
    297 20150310:
    298 	Improvements to openssl for arm mean that update builds of
    299 	the openssl libraries will fail. A make cleandir in
    300 	external/bsd/openssl/lib is needed
    301 
    302 20141026:
    303 	A mishap during the import of pppd may cause your corruption
    304 	in your cvs directory if you happened to do a cvs update
    305 	during a short period of time. To fix, just remove the
    306 	directory src/external/bsd/ppp/dist/pppd completely
    307 	and let cvs restore it on next update.
    308 
    309 20140721:
    310 	The src/external/mit/lua/src directory was accidentally created
    311 	and then deleted in the CVS repository.  If you get errors like
    312 
    313 	cvs [update aborted]: cannot open directory
    314 	/cvsroot/src/external/mit/lua/src: No such file or directory
    315 
    316 	then delete your local copy of that directory tree and try again.
    317 
    318 20140530:
    319 	ARM eABI switched to DWARF based exception handling. This requires
    320 	rebuilding all C++ code. It is strongly advised to do a clean build.
    321 
    322 20140131:
    323 	The new compiler_rt/libc integration moved a few things. It is strongly
    324 	advised to do a clean build. At least lib/libc, the compat version(s)
    325 	of libc, libkern, rump and the kernels need to be cleaned.
    326 
    327 20131227:
    328 	1. The new ntpd runs in a restricted mode to prevent amplification
    329 	   attacks. If you need ntpdc to work you need to explicitly enable
    330 	   mode7 in your config file. Make sure you put the necessary restrict
    331 	   statements to avoid being exposed.
    332 	2. strncat has moved from lib/libc to common/lib/libc; you might need
    333 	   to make clean in libc
    334 
    335 20131129:
    336 	The GMP sources were updated, and builds will likely fail without
    337 	cleaning their build trees for both tools and in-tree, like below.
    338 
    339 20131128:
    340 	The MPC and MPFR sources were updated, and builds may require their
    341 	tools and in-tree directories cleaned for successful updates.
    342 
    343 20130605:
    344 	The kernel option FAST_IPSEC no longer exists, it's been renamed
    345 	to IPSEC (and the older IPSEC version removed).
    346 
    347 20130605:
    348 	Previous freetype installations eroneously installed private
    349 	header files. If you are building against a non-empty $DESTDIR,
    350 	please remove ${DESTDIR}//usr/X11R7/include/freetype2/freetype/.
    351 
    352 20130531:
    353 	The xdm update may cause build failure due to xdm.man being
    354 	in the obj tree.  Make sure to ensure any like this:
    355 		nbmake: nbmake: don't know how to make xdm.man. Stop
    356 	is fixed by deleting the xdm.man in the obj tree.
    357 
    358 20130530:
    359 	Updates of many xsrc packages will leave old .pc files around.
    360 	Best to clean out the xsrc objdir entirely before rebuilds.
    361 
    362 20130301:
    363 	The removal of netiso requires manual removal of /usr/include/netiso
    364 	prior to the build and make cleandir in /usr/src/usr.bin/{ktruss,kdump}
    365 
    366 20120726:
    367 	The update of OpenSSL requires cleaning both the OpenSSL build
    368 	directory and DESTDIR.  *Even non-update builds require cleaning
    369 	DESTDIR.* Builds done without taking these steps may fail, or in
    370 	some cases may succeed and install broken OpenSSL libraries that
    371 	cause third-party software to link incorrectly and/or crash.
    372 
    373 20120507:
    374 	The database schema for makemandb was changed.  You will
    375 	need to update the database using 'makemandb -f' or wait
    376 	for the next weekly run to fix it.
    377 
    378 20120319:
    379 	sys/conf/Makefile.kern.inc has been modified to adjust the
    380 	size of db_symtab automatically.  You need to update dbsym in
    381 	your $TOOLDIR to build kernels with options SYMTAB_SPACE.  If
    382 	you don't want this behavior, add AUTO_SYMTAB_SPACE=no to your
    383 	mk.conf.
    384 
    385 20120216:
    386 	Default for MKCATPAGES changed to NO.  Update builds will fail
    387 	unless DESTDIR is cleaned manually.  If you built between 20120207
    388 	and 20120216, daily and weekly could have created an unreadable
    389 	/var/db/man.db index for apropos.  Running makemandb -f or
    390 	the next run of weekly will fix it.
    391 
    392 20111227:
    393 	If you built between 20111225 and 20111227 you need to remove
    394 	/usr/lib/libpam.so.4* and /usr/lib/security/*.so.4, since the
    395 	bump has been reverted.
    396 
    397 20111125:
    398 	The "rnd" pseudodevice has been added to sys/conf/std, which
    399 	means it should no longer be explicitly listed in kernel
    400 	configuration files.  The line "pseudo-device rnd" should be
    401 	removed from any custom kernel config files users may have.
    402 
    403 20111119:
    404 	A problem with the datastructures used by the rndctl(8)
    405 	utility (pointers in datastructures in an array, making 32->64
    406 	bit compatibility very painful) has been fixed in a
    407 	non-backwards-compatible way.  If you replace your kernel,
    408 	replace your rndctl executable too.
    409 
    410 20111001:
    411 	the prop_*_send_syscall() functions from proplib(3) have been
    412 	changed and their new version is not backward compatible with the old
    413 	one.  So ensure that all consumers of these functions (currently:
    414 	quota2 code and its tests) are updated together with the new lib.
    415 
    416 20110817:
    417 	sparc has been changed to use GCC 4.5.3, so any objdir or
    418 	DESTDIR for them should be deleted before updating.
    419 
    420 20110806:
    421 	i386 and amd64 have been changed to use GCC 4.5.3, so any
    422 	objdir or DESTDIR for them should be deleted before updating.
    423 
    424 20110805:
    425 	The update to GCC 4.5.3 requires a non-trivial portion of
    426 	the tree to be cleaned.  Best to delete both objdir and
    427 	DESTDIR before running this update.  So far, only the
    428 	sparc64, mips and powerpc platforms have changed.
    429 
    430 20110803:
    431 	The layout of external/public-domain/xz has changed.  To do an
    432 	update build you will have to remove the contents of the OBJDIR
    433 	for external/public-domain/xz/bin by hand as the xz entry there
    434 	is now a directory.
    435 
    436 20110410:
    437 	The configuration of src/tools/gcc has changed.  To do an
    438 	update build you have to clean both tools/binutils and
    439 	tools/gcc by hand.
    440 
    441 20110328:
    442 	Building the Xorg binary was moved into a subdirectory to fix
    443 	ordering issues with "make all".  It may be necessary to remove
    444 	the OBJDIR for external/mit/xorg/server/xorg-server/hw/xfree86
    445 	if your update build fails, as the "Xorg" entry there is now a
    446 	directory.
    447 
    448 20110121:
    449 	Assembler files no longer use -traditional-cpp.  This can break
    450 	the build of individual parts of the tree.  This is handled
    451 	correctly by build.sh.  Manual builds have to update /usr/share/mk
    452 	and re-run config(1) for any kernel configurations as needed.
    453 
    454 20101217:
    455 	The tcpdump(8) program was changed to drop privileges and chroot(2)
    456 	by default.  It may be necessary to manually update passwd(5) and
    457 	group(5) in order to make the program work with existing setups.
    458 
    459 20101125:
    460 	The latest changes to setenv(3) dissallow setting environment
    461 	variables with names that contain '='.  Revision 1.18 of env.c
    462 	assumed that this was allowed.  Installing a new libc with an
    463 	old copy of /usr/bin/env causes env x=1 printenv | grep x= to
    464 	break which affects the autoconf tests for dependency finding,
    465 	so building gcc will end up printing:
    466 	    checking dependency style of gcc... none
    467 	    configure: error: no usable dependency style found
    468 	Fix it by rebuilding and re-installing env.
    469 
    470 20101119:
    471 	Recent Xorg updates in xsrc/external/mit/ may cause various build
    472 	or run-time problems.  Delete your entire DESTDIR and OBJDIR if you
    473 	have any build problems with xsrc, or problems with mismatched
    474 	versions between xorg-server and drivers.
    475 
    476 20100604:
    477 	The update of ATF to 0.9 causes old tests written in shell to fail
    478 	unless they are rebuilt.  If you are building with MKUPDATE=yes,
    479 	you need to clean the src/external/bsd/atf/tests/ and the src/tests/
    480 	trees by hand.
    481 
    482 20100522:
    483 	Recent Xorg updates in xsrc/external/mit/ will cause various build
    484 	problems.  Delete your entire DESTDIR and OBJDIR if you have any
    485 	build problems with xsrc.
    486 
    487 20100522:
    488 	private section of <ctype.h> was splitted, and now mklocale(1)
    489 	include ctype_local.h, so you have to make cleandir in tools/mklocale.
    490 
    491 20100520:
    492 	The location of the xkb compiled descriptions has changed.  Please
    493 	remove usr/X11R7/lib/X11/xkb/compiled from your $DESTDIR.
    494 
    495 20100222:
    496 	The shared objects file extension has been changed from .so to
    497 	.pico, in order to avoid conflicts with shared libraries names
    498 	libXX.so.  All now stale regular .so files can be removed from
    499 	your object directories.
    500 
    501 20100204:
    502 	The termcap database has been removed from the sources,
    503 	but has not been marked obsolete so it is not removed
    504 	from the system when upgrading.
    505 	As such, you will need to remove them from your object
    506 	and destination directories.
    507 
    508 20091101:
    509         After updating, it may be necessary to make the 'cleandir'
    510         target in src/tools/yacc/ and in src/usr.bin/yacc/ before a
    511         'build.sh -u tools' or 'build.sh -u distribution'.  Ditto
    512         src/tools/lex/ and src/usr.bin/lex/.
    513 
    514 20091001:
    515 	On amd64 you must rebuild tools (to get the new binutils)
    516 	before building a kernel, or the build fails on cpufunc.S.
    517 
    518 20091001:
    519 	An error will create a ./usr/X11R7/lib/X11/xkb/compiled/xkb
    520 	symlink, failing the build.  Delete the link, and the subdir
    521 	it is in, and retry your build.
    522 
    523 20090718:
    524 	libc build changed so that strchr() provides the extra entry
    525 	point for index().  Update build of libc.a (and libc_pic.a)
    526 	may fail because the archive contains the unwanted index.o.
    527 	(Similarly for strrchr() and rindex().)
    528 
    529 20090709:
    530 	Native Xorg was upgraded again.  Builds will probably fail again
    531 	without a clean objdir, at least for src/external/mit/xorg.
    532 
    533 20090616:
    534 	Native Xorg was upgraded.  Builds will need a clean objdir for
    535 	src/external/mit/xorg.  Upgrading a system from sets will not
    536 	work properly yet as the /usr/X11R7/lib/X11/xkb/symbols/pc
    537 	subdirectory has been changed into a file, and this needs to
    538 	be manually "rm -r"'ed before installing xbase.tgz.
    539 
    540 20090501:
    541 	Several new functions were added to string.h/libc, and this
    542 	can cause autoconf problems during the tool build for people
    543 	who fail to clean out their tools objects properly.  If you
    544 	note messages about stpcpy, stpncpy or strnlen accompanying a
    545 	failure during the tool build, clean out all your tools
    546 	objects and start again.
    547 
    548 20090325:
    549 	The i386 port was switched to i486 default toolchain.  This requires
    550 	cleaning your src/tools directory and $TOOLDIR and rebuilding them.
    551 
    552 20090126:
    553 	The __posix_fadvise50 system call changed assembly stub type.  You
    554 	need to 'rm -f __posix_fadvise50.*' in the libc build directory
    555 	to avoid using the old assembly stub.
    556 
    557 20090202:
    558 	pkg_install now depends on the pkgdb cache for automatic conflict
    559 	detection.  It is recommented to rebuild the cache with
    560 	``pkg_admin rebuild''.
    561 
    562 20090110:
    563 	time_t and dev_t have been bumped to 64 bit quantities.  To upgrade:
    564 	1. Make sure your kernel has COMPAT_50 in it.  Build and install.
    565 	   This is needed even in the MODULAR kernel because there is
    566 	   conditionally compiled code in rtsock.c.
    567 	2. make sure build.sh completes and the binaries in a chroot work
    568 	   before installing.
    569 	3. If you don't use build.sh and you build directly to root, and
    570 	   your build breaks in the middle, don't despair.  Make sure headers
    571 	   are installed properly, and start building libraries first libc
    572 	   and libutil, install them and then continue building all the
    573 	   libraries in src/lib and src/gnu/lib and install them.  Once
    574 	   the new libraries are installed, you can restart the build.
    575 	4. If you compile packages and you notice link time warnings,
    576 	   rebuild the required packages to update their shared libraries.
    577 	   Any package you rebuild will require rebuilding all the packages
    578 	   that depend on it.
    579 	5. Next time you run pwd_mkdb with the new binary, the file
    580 	   will be upgraded and it will not be backwards compatible.
    581 	6. The utmpx/wtmpx files (/var/run/utmpx and /var/log/wtmpx, see
    582 	   lastlogx(5)) have been versioned, and there is a heuristic
    583 	   for utmp.  You are better off removing the old files after
    584 	   upgrading.  The automated clearing of /var/run during
    585 	   boot, and the automated rotating of files in /var/log by
    586 	   newsyslog(8), may mean that you do not have to remove the
    587 	   files manually.
    588 	7. The optional accounting file (/var/account/acct, see
    589 	   accton(8)) has not been versioned, and will need to be
    590 	   removed.  The automatic rotation of the accounting file by
    591 	   /etc/daily limits the bad consequences of failure to remove
    592 	   the file.
    593 	8. Application software that writes time_t to binary files on
    594 	   disk will break or need attention.  Most notably: if you are
    595 	   using PostgreSQL < 8.4, you need to dump your databases,
    596 	   rebuild PostgreSQL with the new time_t, then restore.
    597 
    598 20081219:
    599 	config(1) has been updated, and one of the files it creates -
    600 	swapnetbsd.o - has changed format.  You need to rebuild config
    601 	(done automatically by build.sh) and then you need to rerun
    602 	config on all kernel configuration files before rebuilding those
    603 	kernels.
    604 
    605 20081205:
    606 	If you build with MKX11=no, you should remove /etc/rc.d/xdm and
    607 	/etc/rc.d/xfs from DESTDIR because those files were moved to the xetc
    608 	set and will appear as extra files for MKX11=no update builds.
    609 
    610 20081122:
    611 	On i386, various kernel options(4) in GENERIC including
    612 	file systems have been disabled and moved into kernel modules.
    613 	Before trying a new GENERIC kernel, you have to prepare the
    614 	following files as well as a new GENERIC kernel:
    615 
    616 	- build and install kernel modules from src/sys/modules
    617 
    618 	- install the latest bootloader, which will load a module
    619 	  for the file system from which the kernel is loaded automatically
    620 
    621 	If you have to load your kernel from a file system which is not of
    622 	the same type as the root file system, you have to load the necessary
    623 	file system module manually on the boot prompt or in the boot.cfg file.
    624 
    625 20080827:
    626 	If you built and installed a libc from sources between
    627 	2008/08/20 and 2008/08/26 you got a broken strtouq(3)
    628 	which results in false errors reported by lint(1).
    629 	Since this breaks the libc build itself, manual help is
    630 	needed -- lint must be disabled temporarily, e.g.:
    631 	  $ (cd lib/libc && make MKLINT=no dependall install)
    632 
    633 20080813:
    634 	MKDEBUG build was broken because the .depend files did not know
    635 	about .go files.  You need to remove all .depend files and rebuild.
    636 
    637 20080802:
    638 	A regression in binary compatibility for pthread_mutex_t has
    639 	been fixed.  Unfortunately, the price is breaking compatibility
    640 	for -current.
    641 
    642 	Threaded programs (using libpthread) and C++ programs (using
    643 	libstdc++) compiled after 20070907 and before 20080802 need to
    644 	be recompiled.
    645 
    646 	One way to find affected pkgsrc packages:
    647 
    648 	  $ grep REQUIRES=/usr/lib/libpthread /var/db/pkg/*/+BUILD_INFO
    649 	  $ grep REQUIRES=/usr/lib/libstdc++ /var/db/pkg/*/+BUILD_INFO
    650 
    651 20080731:
    652 	WAPBL (metadata journaling support) has been added, but at this
    653 	time isn't backwards compatible with pre-WAPBL aware kernels
    654 	and userland (fsck_ffs in particular).  Please make sure you
    655 	don't use a journaled filesystem with an older kernel/userland,
    656 	especially an uncleanly mounted journaled filesystem.  WAPBL
    657 	also requires the super block to be in the UFS2 format.  You
    658 	can use fsck_ffs -c 4 to update the superblock format.
    659 
    660 20080721:
    661 	Assembler warnings are now fatal if $WARNS>0 and $NOGCCERROR
    662 	isn't defined.
    663 
    664 20080531:
    665 	The ioctl number of DRVSUSPENDDEV command on /dev/drvctl changed
    666 	from 125 (conflicted with DRVCTLCOMMAND) to 129.  The drvctl(8)
    667 	utility needs to be rebuilt and reinstalled as older binaries
    668 	won't work correctly.  The following sequence of commands:
    669 
    670 	  $ (cd sys/sys/ && nbmake-$arch includes)
    671 	  $ (cd sbin/drvctl/ && nbmake-$arch clean)
    672 	  $ (cd sbin/drvctl/ && nbmake-$arch all)
    673 
    674 	leaves new drvctl utility in sbin/drvctl build directory.
    675 
    676 20080503:
    677 	The <bsd.lib.mk> variable MKPRIVATELIB was renamed to LIBISPRIVATE.
    678 
    679 20080521:
    680 	For a while, unprivileged UPDATE builds would fail to
    681 	succeed at the checkflist stage, complaining that
    682 	${DESTDIR}/stand/<arch>/ did not exist.  A fix for this
    683 	problem was committed to share/mk/bsd.kmodule.mk, revision 1.9.
    684 	If you already hit this problem, update the .mk file,
    685 	remove ${DESTDIR}/stand/<arch>, and re-run the build.
    686 
    687 20080303:
    688 	Linker warnings are now fatal if $WARNS>0.
    689 
    690 20080126:
    691 	The posix_fadvise system call has been changed from an assembly
    692 	stub, to a c file that calls an assembly stub.  You need to
    693 	'rm -f posix_fadvise.* .depend' in the libc build directory to
    694 	avoid using the old assembly stub.
    695 
    696 20071209:
    697 	The acpiec(4) driver has been split into two attachments.  If you
    698 	get ACPI errors before the attachment, please update your kernel
    699 	configuration file appropriately or see GENERIC for more details.
    700 
    701 20071115:
    702 	The it(4) driver has been renamed to itesio(4) and the old port
    703 	argument specified in the kernel configuration file is not valid
    704 	anymore.  The itesio(4) driver now uses the Super I/O address port
    705 	rather than the EC address port.  Please update your kernel
    706 	configuration file appropriately or see GENERIC for more details.
    707 
    708 20071028:
    709 	The pccons(4) driver has been removed from the NetBSD/shark port.
    710 	You need to update any custom kernel configuration file you have
    711 	to remove any references to pccons (which includes removing the
    712 	now useless XSERVER option) and replace them with the correct
    713 	entries for the wscons driver.  See the GENERIC configuration file
    714 	for more details.
    715 
    716 20070913:
    717 	A latent bug in dhclient/dhcpd that caused it to be unable to
    718 	enumerate interfaces was fixed.  The bug began to cause
    719 	problems after 20070911 when the kernel's SIOCGIFCONF
    720 	implementation was repaired.  From 20070529 to 20070911 racoon
    721 	could not enumerate interfaces.  (These are noted because
    722 	normal kernel/userspace version matching hygiene is not
    723 	sufficient to avoid this problem.)  Ensure that both kernel
    724 	and userland are from after 20070913.
    725 
    726 20070703:
    727 	nbinstall has been renamed ${MACHINE_GNU_ARCH}-install.  It
    728 	calls the target-specific strip program, and the logic to pass
    729 	down STRIP from make has been removed.  This requires a
    730 	re-installation of tools.
    731 
    732 20070422:
    733 	The way OS emulations lookup filenames inside the emulation root
    734 	has been changed.  Rather than modify the pathname (and copy back
    735 	to userspace) namei() and lookup() directly check the emulation
    736 	root.  One side effect is that absolute symlinks inside the emulated
    737 	root file system will be relative to that file system - unless they
    738 	start /../ this is useful when the emulated root is a real install
    739 	that has such links.
    740 	This might affect symlinks that have been added to reference outside
    741 	the emulated root.
    742 
    743 20070412:
    744 	The pckbc driver on sgimips IP32 has been removed.  Use macekbc
    745 	instead.  See the GENERIC32_IP3x kernel configuration for an
    746 	example.
    747 
    748 20070319:
    749         src/lib/libc/Makefile revision 1.129 broke libc and ld.elf_so
    750         on many platforms due to incorrect flags settings.  If you
    751         updated and built after about 20070315, do "nbmake-$arch
    752 	cleandir" in src/lib/libc and src/libexec/ld.elf_so to force a
    753 	rebuild of object files that might have been built
    754 	incorrectly, and ensure that you have at least
    755 	src/lib/libc/Makefile 1.130.
    756 
    757 20070210:
    758         src/sys/sys/{sa.h,savar.h} were removed.
    759           find ${OBJDIR} \( -name .depend -o -name '*.d' \) -print \
    760               | xargs egrep -l '/sa.h|/savar.h' | xargs rm
    761         will allow dependencies on those files to get get rebuilt
    762 
    763 20070209:
    764         The threading model was changed when the newlock2 branch
    765         was merged to NetBSD-current.  If you boot with a new
    766         kernel (version 4.99.10), then you also need a new pthread
    767         library (/usr/lib/libpthread.so.0.7).  If you boot with
    768         an old kernel, then you need the old pthread library
    769         (/usr/lib/libpthread.so.0.6).  Provided you keep the kernel and
    770         the pthread library in sync, old threaded applications should
    771         continue to work with an old or new kernel.  Note that named(8)
    772 	is the only threaded application in the base system.
    773 
    774 20061214:
    775 	Following the move of string_to_flags() and flags_to_string()
    776 	from the bin/ls/ sources to libutil, users doing UPDATE builds
    777 	will need to do a "make cleandir" in
    778 		tools/mtree/, tools/makefs/, tools/binstall/, tools/pax/,
    779 		bin/pax/, bin/ls/, usr.sbin/mtree/, usr.sbin/makefs/,
    780 		usr.bin/xinstall/, libexec/ftpd/, rescue/, as well
    781 		as the installation images in distrib/
    782 	in order to excise stale references to the old stat_flags.h header
    783 	file in the ls sources -- stat_flags.h has been removed.
    784 
    785 20061108:
    786 	The configure script used in the src/tools/gcc compiler has been
    787 	changed to indicate that our libc has ssp support built-in and
    788 	does not depend on -lssp and -lssp-nonshared.  You'll need to
    789 	make clean in src/tools/gcc first to rebuild the compiler.
    790 
    791 20061009:
    792 	The sysctl variables net.inet{,6}.tcp{,6}.newreno are no longer
    793 	available.  Use net.inet{,6}.tcp{,6}.congctl.selected instead.
    794 
    795 20060814:
    796 	The vt, vidcconsole, kbd, and rpckbd drivers on acorn32 have been
    797 	withdrawn.  Use vidcvideo and pckbd instead.  See the GENERIC
    798 	kernel configuration for an example.  X servers from the last
    799 	few years should cope.
    800 
    801 20060703:
    802 	MPACPI is no more.  We always configure PCI interrupts using ACPI
    803 	if we have an ACPI kernel.  The option MPACPI_SCANPCI has been renamed
    804 	to ACPI_SCANPCI.  Thanks to work from fvdl.
    805 
    806 20060627:
    807 	socket(2) has changed, and its system call has been versioned.
    808 	For userlands with the old version of socket(2), make sure that
    809 	your kernel has 'options COMPAT_30' set, or else 'bad system call'
    810 	errors will result.
    811 
    812 Hints for a more successful build:
    813 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    814     Use build.sh, but do not use its "expert mode":
    815 	This will automatically build the tools in the
    816 	   correct order, and it will keep the tools and the
    817 	   new build products from interfering with the running
    818 	   system.  This will allow you to ignore most of the
    819 	   other advice in this file.
    820     Build a new kernel first:
    821 	This makes sure that any new system calls or features
    822 	   expected by the new userland will be present.  This
    823 	   helps to avoid critical errors when upgrading.
    824     Use object directories:
    825 	This helps to keep stale object
    826 	   files from polluting the build if a Makefile "forgets"
    827 	   about one.  It also makes it easier to clean up after
    828 	   a build.  It's also necessary if you want to use the
    829 	   same source tree for multiple machines.
    830 	   To use object directories with build.sh:
    831 	    a) invoke build.sh with the "-M" or "-O" options.
    832 	   To use object directories without using build.sh:
    833 	    a) cd /usr/src ; make cleandir
    834 	    b) Add "OBJMACHINE=yes" to /etc/mk.conf
    835 	    c) Add "MKOBJDIRS=yes" to /etc/mk.conf
    836 	    d) cd /usr/src ; make build
    837 	   Note that running "make obj" in a directory will create
    838 	   in obj.$MACHINE directory.
    839     Build to a DESTDIR:
    840 	This helps to keep old installed files (especially libraries)
    841 	   from interfering with the new build.
    842 	   To build to a DESTDIR with build.sh, use the "-D" option.
    843 	   To build to a DESTDIR without using build.sh, set the DESTDIR
    844 	   environment variable before running make build.  It should be
    845 	   set to the pathname of an initially empty directory.
    846 	   Problems: if you do not use build.sh, you might need to
    847 		update critical utilities without using DESTDIR since
    848 		nothing is executed from what is installed in DESTDIR.
    849 		(See critical utils, below.)
    850     Build often:
    851 	This keeps critical utilities current enough to not choke
    852 	on any other part of the source tree that depends on up to
    853 	date functionality.  If you use build.sh, you should not have
    854 	this problem.
    855 
    856 What to do if things don't work:
    857 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    858 When things don't work there are usually a few things that commonly
    859 should be done.
    860     1)	make includes
    861 	This should be done automatically by make build.
    862     2)  cd share/mk && make install
    863 	Again, automatically done by make build.
    864 
    865 Failsafe rebuild of a small part of the tree:
    866 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    867 To make sure you rebuild something correctly you want to do
    868 something like the following:
    869     1)  Make sure the includes and .mk files are up to date.
    870     2)  Make sure any program used to build the particular
    871 	utility is up to date.  (yacc, lex, etc...)
    872     3)  cd ...path/to/util...
    873 	make cleandir
    874 	rm ...all obj directories...
    875 	make cleandir			# yes, again
    876 	make obj
    877 	make depend && make
    878 
    879 Failsafe rebuild of the entire tree:
    880 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    881 If you really want to make sure the source tree is clean and
    882 ready for a build try the following.  Note that sourcing /etc/mk.conf
    883 (a make(1) Makefile) in this manner is not right, and will not work
    884 for anyone who uses any make(1) features in /etc/mk.conf.
    885 
    886 ---cut here---
    887 #!/bin/sh
    888 . /etc/mk.conf
    889 
    890 if [ -z $NETBSDSRCDIR ] ; then
    891     NETBSDSRCDIR=/usr/src
    892 fi
    893 if [ \! -d $NETBSDSRCDIR ] ; then
    894     echo Unable to find sources
    895     exit 1
    896 fi
    897 find $NETBSDSRCDIR -name \*.o -o -name obj.\* -o -name obj -exec rm \{\} \;
    898 
    899 if [ -z $BSDOBJDIR ] ; then
    900     BSDOBJDIR=/usr/obj
    901 fi
    902 if [ -d $BSDOBJDIR ] ; then
    903     rm -rf $BSDOBJDIR
    904 fi
    905 
    906 cd $NETBSDSRCDIR && make cleandir
    907 
    908 ---cut here---
    909 
    910 Critical utilities:
    911 ^^^^^^^^^^^^^^^^^^^
    912 	usr.bin/compile_et
    913 	usr.bin/make
    914 	usr.bin/yacc
    915 	usr.bin/lex
    916 	usr.bin/xlint
    917 	usr.bin/config
    918 
    919 Other problems and possible solutions:
    920 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    921 Symptom:Complaints involving a Makefile.
    922 Fix:	Rebuild usr.bin/make:
    923 	cd usr.bin/make && make && make install
    924 	Or, a failsafe method if that doesn't work:
    925 	cd usr.bin/make && cc *.c */*.c -I . -o make && mv make /usr/bin
    926 
    927 Fix:	Make sure .mk files are up to date.
    928 	cd share/mk && make install
    929 
    930 Symptom:Kernel `config' fails to configure any kernel, including GENERIC.
    931 Fix:	Rebuild usr.bin/config
    932 
    933 Symptom:
    934 Fix:	Rebuild usr.bin/yacc
    935 
    936 Symptom:
    937 Fix:	Rebuild usr.bin/lex
    938 
    939 Symptom:
    940 Fix:	rm /usr/lib/libbfd.a
    941 
    942 Symptom:Obsolete intermediate files are used during compilation
    943 Fix:	Try the following sequence of commands in the directory in question.
    944 	make cleandir; rm `make print-objdir`; make cleandir; make obj
    945 	(If you built the tree without "make obj" in the past, obsolete files
    946 	may remain.  The command tries to clean everything up)
    947 
    948 Symptom:.../sysinst/run.c:xx: warning: initialization from incompatible
    949 	pointer type
    950 Fix:	Rebuild and install usr.bin/menuc
    951 
    952 Symptom:mklocale not found during build in share/locale/ctype
    953 Fix:	Build and install usr.bin/mklocale
    954 
    955 Symptom:undefined reference to `__assert13' or `__unsetenv13'
    956 Fix:    Rebuild and install lib/libc
    957 
    958 Symptom:usr.bin/config fails to build.
    959 Fix:	Try building with -DMAKE_BOOTSTRAP added to CFLAGS in Makefile.
    960 
    961 Symptom:undefined reference to `getprogname' or `setprogname'
    962 Fix:    Rebuild and install lib/libc
    963 
    964 Symptom:lint does not understand the '-X' option
    965 Fix:    May need to build & install libs with NOLINT=1 before rebuilding lint
    966 
    967 Symptom:Update build fails in src/tools/gcc complaining that a variable
    968 	(e.g. CPPFLAGS) has changed since the previous run.
    969 Fix:    Run "nbmake-${ARCH} clean" in src/tools/gcc or do a clean build.
    970 
    971 Symptom:cvs [update aborted]: cannot open directory /cvsroot/src/...:
    972 	No such file or directory.
    973 Cause:	If a directory is created by mistake, then it is sometimes
    974 	deleted from the CVS repository using administrative commands
    975 	that bypass the normal cvs access controls.  If your cvs working tree
    976 	contains references to a directory that has been deleted on the
    977 	server in this way, then "cvs update" reports this error.
    978 Fix:	Recursively delete the affected directory from your working tree
    979 	and try the update again.
    980