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UPDATING revision 1.315
      1 $NetBSD: UPDATING,v 1.315 2020/09/26 08:02:35 mrg 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 20200925:
     23 	GNU MPC and MPFR have been updated.  At least MPFR needs cleaning
     24 	in both the tools and external dirs.
     25 
     26 20200912:
     27 	GCC 9 has arrived for Arm and x86 platforms, and will be coming
     28 	for several more, as will binutils 2.34.  Clean as required.
     29 
     30 20200907:
     31 	GCC 9 is coming, and binutils has been updated for MIPS.  This
     32 	probably requires cleaning the tools/binutils.
     33 
     34 20200811:
     35 	GCC updates may require cleaning the objdir.  This may occur
     36 	due to GCC 7.5 update, GCC 8.4 move to gcc.old, or the upcoming
     37 	GCC 9 upgrade.
     38 
     39 20200614:
     40 	blacklist* has been renamed to blocklist*. postinstall(8)
     41 	should handle the migration
     42 
     43 20200601:
     44 	Due to a mistake in LIBISPRIVATE handling, .so libraries were
     45 	created in the build directories and need cleaning.
     46 
     47 20200311:
     48 	GCC 8 ports will need cleaning in src/tools/gcc and
     49 	src/external/gpl3/gcc due to GCC 8.4 update.
     50 
     51 20191118:
     52 	More architectures were switched to gcc8:
     53 	    i386, ia64 powerpc64, sparc, sparc64, arm
     54 	The same comments as in 20191022 apply.
     55 
     56 20191112:
     57 	The LLVM update requires a clean rebuild for all architectures using
     58 	LLVM during the tools build phase (i386, amd64, aarch64).
     59 
     60 20191022:
     61 	Ports amd64 and aarch64 switched to GCC 8.3 by default.
     62 	In-place ("expert mode", build.sh -E) builds are not supported
     63 	when going from a GCC 7 userland to GCC 8. Do a regular
     64 	build to a different DESTDIR (or preferably: build.sh -U) at least
     65 	once and install sets, or download comp.{tar.xz,tgz} from the
     66 	daily builds and install that before doing the next in-place build.
     67 
     68 20191001:
     69 	GCC 8.3 was imported.  Builds of src/tools/gcc may fail if
     70 	old builds with GCC 7 output now uses GCC 8.  Clean this
     71 	directory, and also clean src/external/gpl3/gcc.
     72 
     73 20190903:
     74 	Files with names that coincide with existing files' names on
     75 	case-insensitive file systems were inadvertently committed, for
     76 	radeon GPU firmware.  We cannot mark these as obsolete for
     77 	postinstall to fix, so if you updated src since 2019-08-26, and
     78 	ran build.sh distribution or ran build.sh release, you must
     79 	manually delete the following files in your DESTDIR (which is
     80 	usually $OBJDIR/destir.$ARCH), or from / if you have installed
     81 	them:
     82 
     83 		/libdata/firmware/radeon/bonaire_ce.bin
     84 		/libdata/firmware/radeon/bonaire_mc.bin
     85 		/libdata/firmware/radeon/bonaire_me.bin
     86 		/libdata/firmware/radeon/bonaire_mec.bin
     87 		/libdata/firmware/radeon/bonaire_pfp.bin
     88 		/libdata/firmware/radeon/bonaire_rlc.bin
     89 		/libdata/firmware/radeon/bonaire_sdma.bin
     90 		/libdata/firmware/radeon/bonaire_smc.bin
     91 		/libdata/firmware/radeon/bonaire_uvd.bin
     92 		/libdata/firmware/radeon/hainan_ce.bin
     93 		/libdata/firmware/radeon/hainan_mc.bin
     94 		/libdata/firmware/radeon/hainan_me.bin
     95 		/libdata/firmware/radeon/hainan_pfp.bin
     96 		/libdata/firmware/radeon/hainan_rlc.bin
     97 		/libdata/firmware/radeon/hainan_smc.bin
     98 		/libdata/firmware/radeon/hawaii_ce.bin
     99 		/libdata/firmware/radeon/hawaii_mc.bin
    100 		/libdata/firmware/radeon/hawaii_me.bin
    101 		/libdata/firmware/radeon/hawaii_mec.bin
    102 		/libdata/firmware/radeon/hawaii_pfp.bin
    103 		/libdata/firmware/radeon/hawaii_rlc.bin
    104 		/libdata/firmware/radeon/hawaii_sdma.bin
    105 		/libdata/firmware/radeon/hawaii_smc.bin
    106 		/libdata/firmware/radeon/kabini_ce.bin
    107 		/libdata/firmware/radeon/kabini_me.bin
    108 		/libdata/firmware/radeon/kabini_mec.bin
    109 		/libdata/firmware/radeon/kabini_pfp.bin
    110 		/libdata/firmware/radeon/kabini_rlc.bin
    111 		/libdata/firmware/radeon/kabini_sdma.bin
    112 		/libdata/firmware/radeon/kaveri_ce.bin
    113 		/libdata/firmware/radeon/kaveri_me.bin
    114 		/libdata/firmware/radeon/kaveri_mec.bin
    115 		/libdata/firmware/radeon/kaveri_mec2.bin
    116 		/libdata/firmware/radeon/kaveri_pfp.bin
    117 		/libdata/firmware/radeon/kaveri_rlc.bin
    118 		/libdata/firmware/radeon/kaveri_sdma.bin
    119 		/libdata/firmware/radeon/mullins_ce.bin
    120 		/libdata/firmware/radeon/mullins_me.bin
    121 		/libdata/firmware/radeon/mullins_mec.bin
    122 		/libdata/firmware/radeon/mullins_pfp.bin
    123 		/libdata/firmware/radeon/mullins_rlc.bin
    124 		/libdata/firmware/radeon/mullins_sdma.bin
    125 		/libdata/firmware/radeon/oland_ce.bin
    126 		/libdata/firmware/radeon/oland_mc.bin
    127 		/libdata/firmware/radeon/oland_me.bin
    128 		/libdata/firmware/radeon/oland_pfp.bin
    129 		/libdata/firmware/radeon/oland_rlc.bin
    130 		/libdata/firmware/radeon/oland_smc.bin
    131 		/libdata/firmware/radeon/pitcairn_ce.bin
    132 		/libdata/firmware/radeon/pitcairn_mc.bin
    133 		/libdata/firmware/radeon/pitcairn_me.bin
    134 		/libdata/firmware/radeon/pitcairn_pfp.bin
    135 		/libdata/firmware/radeon/pitcairn_rlc.bin
    136 		/libdata/firmware/radeon/pitcairn_smc.bin
    137 		/libdata/firmware/radeon/tahiti_ce.bin
    138 		/libdata/firmware/radeon/tahiti_mc.bin
    139 		/libdata/firmware/radeon/tahiti_me.bin
    140 		/libdata/firmware/radeon/tahiti_pfp.bin
    141 		/libdata/firmware/radeon/tahiti_rlc.bin
    142 		/libdata/firmware/radeon/tahiti_smc.bin
    143 		/libdata/firmware/radeon/verde_ce.bin
    144 		/libdata/firmware/radeon/verde_mc.bin
    145 		/libdata/firmware/radeon/verde_me.bin
    146 		/libdata/firmware/radeon/verde_pfp.bin
    147 		/libdata/firmware/radeon/verde_rlc.bin
    148 		/libdata/firmware/radeon/verde_smc.bin
    149 
    150 	We will re-import these radeon firmware images another way
    151 	later.
    152 
    153 20190727:
    154 	The uefi bootloader has gained tftp support and needs a clean
    155 	build. If you do update builds, manually clean its object
    156 	directory by something like:
    157 	cd sys/arch/i386/stand/efiboot && make clean
    158 
    159 20190723:
    160 	The jemalloc allocator in libc is now build without extended
    161 	debugging (for performance reasons). In update builds make sure
    162 	to rebuild it completly, by removing all affected object files,
    163 	including compat builds, something like:
    164 	cd /usr/obj && find . -type d -name jemalloc|xargs rm -rf
    165 
    166 20190207:
    167 	GCC 7 switched for many ports.  Update builds are likely to fail.
    168 
    169 20180924:
    170 	A newer OpenSSL version has been imported. If you are doing
    171 	update builds, make sure to remove all old obj dirs, like:
    172 	cd /usr/obj && find . -type d -name openssl | xargs rm -rf
    173 
    174 20180717:
    175 	On aarch64 int64_t and related types have changed from long long
    176 	to long. This requires recompiling all C++ binaries.
    177 
    178 20180713:
    179 	On amd64 and i386 static binaries are now build position
    180 	independend. This requires recompilation of all object
    181 	files used to create the crunched /rescue binary.
    182 	Clean the rescue directory in your obj directory before
    183 	doing an update build, otherwise linking will fail.
    184 
    185 20180414:
    186 	Existing binutils was migrated to binutils.old.  Manual
    187 	removal of tools/binutils objects directory may be required
    188 	to fix tools build failure.
    189 
    190 20180311:
    191 	bdftopcf was updated and may need cleaning in the
    192 	src/external/mit/xorg/tools/bdftopcf subdirectory if there are
    193 	link errors.
    194 
    195 20180212:
    196 	between OpenSSL and GCC updates, many things may fail to build.
    197 	any failure that looks like GCC or openssl is best handled by
    198 	a clean destdir and objdir.  Full cleandir and destdir deletion
    199 	is recommended if build failures occur.
    200 
    201 20171225:
    202 	removal of the vadvise syscall requires manual removal of all
    203 	associated files from the libc build object directory (including
    204 	the .depend files) - a command like:
    205 		cd $OBJ && find . -type d -name libc | xargs rm -rf
    206 	For architectures that support multiple "compat" binary targets,
    207 	you'll need to cleanup both the regular libc directory and the
    208 	compat ones (the above command will do that).
    209 
    210 20171010:
    211 	a change to the build structure of external/bsd/acpica/bin/iasl
    212 	means that its objdir (or *.d and .depend at least) might need
    213 	to be manually removed - or a build done once without -u.
    214 
    215 20170822:
    216 	a new version of GMP has been imported and probably
    217 	will break parts of builds related to themselves or GCC, both
    218 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    219 	and MPC objdirs or build once without -u.
    220 
    221 20170816:
    222 	a new version of MPFR and MPC have been imported and probably
    223 	will break parts of builds related to themselves or GCC, both
    224 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    225 	and MPC objdirs or build once without -u.
    226 
    227 20170402:
    228 	a new version of dhcpcd has been imported, which does not support
    229 	update builds from the previous version. Remove your
    230 	external/bsd/dhcpcd object dir or build once without -u.
    231 
    232 20170211:
    233 	a new terminfo database has been imported.
    234 	The structure of it has changed slightly from prior versions and
    235 	an updated tic tool is required.
    236 	If you build.sh, don't use -u
    237 
    238 20170207:
    239 	various arch dependent libc/exect.S files were removed
    240 	Either remove the obj directories (lib/libc and compat/amd64/i386/lib
    241 	if it exists) or do a clean build.
    242 	(This is a bug in the make system, it should be corrected without
    243 	human intervention, but isn't.)
    244 
    245 20170104:
    246 	xinput build options have changed.
    247 	Remove the obj directory (external/mit/xorg/bin/xinput)
    248 	if you build.sh -u
    249 
    250 20170103:
    251 	a new version of flex has been imported.
    252 	Remove the file from obj (external/bsd/flex)
    253 	if you build.sh -u
    254 
    255 20161014:
    256 	a new version of OpenSSL has been imported.
    257 	Remove the files from obj (crypto/external/bsd/openssl) 
    258 	if you build.sh -u
    259 
    260 20161009:
    261 	a new version of dhcpcd has been imported with slightly changed
    262 	build infrastructure. When doing a build.sh -u this requires
    263 	pruning the external/bsd/dhcpcd objdir.
    264 
    265 20160914:
    266 	i386, amd64, shark, ofppc and macppc have joined shark and x68k
    267 	ports in using xorg-server 1.18. This requires a clean destdir
    268 	and a clean objdir.
    269 
    270 20160527:
    271 	i386 needs a full cleandir or objdir deletion because PIE has
    272 	been enabled. (see the amd64 entry two down for further info)
    273 
    274 20160418:
    275 	libedit needs manual removal of all autogenerated files since
    276 	some of them are not autogenerated anymore. Remember that there
    277 	might be two copies of libedit if your platform builds "compat".
    278 
    279 20160410:
    280 	amd64 needs full "make cleandir" or deletion of objdir now that
    281 	PIE has been enabled for amd64.  PIE, or position-independent
    282 	executables, means all code, including executables and not just
    283 	shared libraries, is position-independent and hence able to be
    284 	relocated by ASLR, address space layout randomization.
    285 
    286 	The change was made in Makefile variables for compiler and
    287 	linker flags, for which make(1) does not record dependencies,
    288 	hence it is unable to detect that all .o files need rebuilding.
    289 
    290 	Partial rebuilds with some modified source files will likely
    291 	fail when linking executables, since the linker refuses to mix
    292 	position-independent code with position-dependent code in
    293 	position-independent executables:
    294 
    295 		.../x86_64--netbsd/bin/ld: foo.o: relocation R_X86_64_32 against `...' cannot be used when making a shared object; recompile with -fPIC
    296 
    297 20160401:
    298 	Ports switching to GCC 5.3 will need a full "make cleandir".
    299 	Some people have found that cleandir is not sufficient, so if
    300 	in doubt delete the entire object directory tree for gcc.
    301 
    302 20160306:
    303 	NetBSD's regexp implementation is now part of libnbcompat.
    304 	Nblex, nbm4, nbpax, nbsed use it and they may crash on
    305 	non-NetBSD hosts if linked with stale object files produced
    306 	while they included a non-NetBSD regex.h.
    307 	In any case, you should "make cleandir" at least these tools
    308 	before updating your toolchain.
    309 
    310 20160125:
    311 	Dtrace has been enabled by default on some architectures.
    312 	When doing an update build, make sure to clean the etc/mtree
    313 	object directory before starting the build - otherwise the
    314 	needed directories in destdir will not be created.
    315 	An easy way to do this is:
    316 	   cd src/etc/mtree && $TOOLDIR/bin/nbmake-$arch cleandir
    317 
    318 20150818:
    319 	New acpica requires "make cleandir" in src/external/bsd/acpica
    320 	again.
    321 
    322 20150413:
    323 	New acpica requires "make cleandir" and reinstalling yacc
    324 	in /usr/src/external/bsd/byacc and /usr/src/tools/yacc and
    325 	also "make cleandir" in /usr/src/external/bsd/acpica.
    326 
    327 20150404:
    328 	Lint changes require a full rebuild of the tool, so make
    329 	sure to build without -u option to build.sh, or manually
    330 	do a make cleandir in src/tools/lint1 and
    331 	src/usr.bin/xlint.
    332 
    333 20150310:
    334 	Improvements to openssl for arm mean that update builds of
    335 	the openssl libraries will fail. A make cleandir in
    336 	external/bsd/openssl/lib is needed
    337 
    338 20141026:
    339 	A mishap during the import of pppd may cause your corruption
    340 	in your cvs directory if you happened to do a cvs update
    341 	during a short period of time. To fix, just remove the
    342 	directory src/external/bsd/ppp/dist/pppd completely
    343 	and let cvs restore it on next update.
    344 
    345 20140721:
    346 	The src/external/mit/lua/src directory was accidentally created
    347 	and then deleted in the CVS repository.  If you get errors like
    348 
    349 	cvs [update aborted]: cannot open directory
    350 	/cvsroot/src/external/mit/lua/src: No such file or directory
    351 
    352 	then delete your local copy of that directory tree and try again.
    353 
    354 20140530:
    355 	ARM eABI switched to DWARF based exception handling. This requires
    356 	rebuilding all C++ code. It is strongly advised to do a clean build.
    357 
    358 20140131:
    359 	The new compiler_rt/libc integration moved a few things. It is strongly
    360 	advised to do a clean build. At least lib/libc, the compat version(s)
    361 	of libc, libkern, rump and the kernels need to be cleaned.
    362 
    363 20131227:
    364 	1. The new ntpd runs in a restricted mode to prevent amplification
    365 	   attacks. If you need ntpdc to work you need to explicitly enable
    366 	   mode7 in your config file. Make sure you put the necessary restrict
    367 	   statements to avoid being exposed.
    368 	2. strncat has moved from lib/libc to common/lib/libc; you might need
    369 	   to make clean in libc
    370 
    371 20131129:
    372 	The GMP sources were updated, and builds will likely fail without
    373 	cleaning their build trees for both tools and in-tree, like below.
    374 
    375 20131128:
    376 	The MPC and MPFR sources were updated, and builds may require their
    377 	tools and in-tree directories cleaned for successful updates.
    378 
    379 20130605:
    380 	The kernel option FAST_IPSEC no longer exists, it's been renamed
    381 	to IPSEC (and the older IPSEC version removed).
    382 
    383 20130605:
    384 	Previous freetype installations eroneously installed private
    385 	header files. If you are building against a non-empty $DESTDIR,
    386 	please remove ${DESTDIR}//usr/X11R7/include/freetype2/freetype/.
    387 
    388 20130531:
    389 	The xdm update may cause build failure due to xdm.man being
    390 	in the obj tree.  Make sure to ensure any like this:
    391 		nbmake: nbmake: don't know how to make xdm.man. Stop
    392 	is fixed by deleting the xdm.man in the obj tree.
    393 
    394 20130530:
    395 	Updates of many xsrc packages will leave old .pc files around.
    396 	Best to clean out the xsrc objdir entirely before rebuilds.
    397 
    398 20130301:
    399 	The removal of netiso requires manual removal of /usr/include/netiso
    400 	prior to the build and make cleandir in /usr/src/usr.bin/{ktruss,kdump}
    401 
    402 20120726:
    403 	The update of OpenSSL requires cleaning both the OpenSSL build
    404 	directory and DESTDIR.  *Even non-update builds require cleaning
    405 	DESTDIR.* Builds done without taking these steps may fail, or in
    406 	some cases may succeed and install broken OpenSSL libraries that
    407 	cause third-party software to link incorrectly and/or crash.
    408 
    409 20120507:
    410 	The database schema for makemandb was changed.  You will
    411 	need to update the database using 'makemandb -f' or wait
    412 	for the next weekly run to fix it.
    413 
    414 20120319:
    415 	sys/conf/Makefile.kern.inc has been modified to adjust the
    416 	size of db_symtab automatically.  You need to update dbsym in
    417 	your $TOOLDIR to build kernels with options SYMTAB_SPACE.  If
    418 	you don't want this behavior, add AUTO_SYMTAB_SPACE=no to your
    419 	mk.conf.
    420 
    421 20120216:
    422 	Default for MKCATPAGES changed to NO.  Update builds will fail
    423 	unless DESTDIR is cleaned manually.  If you built between 20120207
    424 	and 20120216, daily and weekly could have created an unreadable
    425 	/var/db/man.db index for apropos.  Running makemandb -f or
    426 	the next run of weekly will fix it.
    427 
    428 20111227:
    429 	If you built between 20111225 and 20111227 you need to remove
    430 	/usr/lib/libpam.so.4* and /usr/lib/security/*.so.4, since the
    431 	bump has been reverted.
    432 
    433 20111125:
    434 	The "rnd" pseudodevice has been added to sys/conf/std, which
    435 	means it should no longer be explicitly listed in kernel
    436 	configuration files.  The line "pseudo-device rnd" should be
    437 	removed from any custom kernel config files users may have.
    438 
    439 20111119:
    440 	A problem with the datastructures used by the rndctl(8)
    441 	utility (pointers in datastructures in an array, making 32->64
    442 	bit compatibility very painful) has been fixed in a
    443 	non-backwards-compatible way.  If you replace your kernel,
    444 	replace your rndctl executable too.
    445 
    446 20111001:
    447 	the prop_*_send_syscall() functions from proplib(3) have been
    448 	changed and their new version is not backward compatible with the old
    449 	one.  So ensure that all consumers of these functions (currently:
    450 	quota2 code and its tests) are updated together with the new lib.
    451 
    452 20110817:
    453 	sparc has been changed to use GCC 4.5.3, so any objdir or
    454 	DESTDIR for them should be deleted before updating.
    455 
    456 20110806:
    457 	i386 and amd64 have been changed to use GCC 4.5.3, so any
    458 	objdir or DESTDIR for them should be deleted before updating.
    459 
    460 20110805:
    461 	The update to GCC 4.5.3 requires a non-trivial portion of
    462 	the tree to be cleaned.  Best to delete both objdir and
    463 	DESTDIR before running this update.  So far, only the
    464 	sparc64, mips and powerpc platforms have changed.
    465 
    466 20110803:
    467 	The layout of external/public-domain/xz has changed.  To do an
    468 	update build you will have to remove the contents of the OBJDIR
    469 	for external/public-domain/xz/bin by hand as the xz entry there
    470 	is now a directory.
    471 
    472 20110410:
    473 	The configuration of src/tools/gcc has changed.  To do an
    474 	update build you have to clean both tools/binutils and
    475 	tools/gcc by hand.
    476 
    477 20110328:
    478 	Building the Xorg binary was moved into a subdirectory to fix
    479 	ordering issues with "make all".  It may be necessary to remove
    480 	the OBJDIR for external/mit/xorg/server/xorg-server/hw/xfree86
    481 	if your update build fails, as the "Xorg" entry there is now a
    482 	directory.
    483 
    484 20110121:
    485 	Assembler files no longer use -traditional-cpp.  This can break
    486 	the build of individual parts of the tree.  This is handled
    487 	correctly by build.sh.  Manual builds have to update /usr/share/mk
    488 	and re-run config(1) for any kernel configurations as needed.
    489 
    490 20101217:
    491 	The tcpdump(8) program was changed to drop privileges and chroot(2)
    492 	by default.  It may be necessary to manually update passwd(5) and
    493 	group(5) in order to make the program work with existing setups.
    494 
    495 20101125:
    496 	The latest changes to setenv(3) dissallow setting environment
    497 	variables with names that contain '='.  Revision 1.18 of env.c
    498 	assumed that this was allowed.  Installing a new libc with an
    499 	old copy of /usr/bin/env causes env x=1 printenv | grep x= to
    500 	break which affects the autoconf tests for dependency finding,
    501 	so building gcc will end up printing:
    502 	    checking dependency style of gcc... none
    503 	    configure: error: no usable dependency style found
    504 	Fix it by rebuilding and re-installing env.
    505 
    506 20101119:
    507 	Recent Xorg updates in xsrc/external/mit/ may cause various build
    508 	or run-time problems.  Delete your entire DESTDIR and OBJDIR if you
    509 	have any build problems with xsrc, or problems with mismatched
    510 	versions between xorg-server and drivers.
    511 
    512 20100604:
    513 	The update of ATF to 0.9 causes old tests written in shell to fail
    514 	unless they are rebuilt.  If you are building with MKUPDATE=yes,
    515 	you need to clean the src/external/bsd/atf/tests/ and the src/tests/
    516 	trees by hand.
    517 
    518 20100522:
    519 	Recent Xorg updates in xsrc/external/mit/ will cause various build
    520 	problems.  Delete your entire DESTDIR and OBJDIR if you have any
    521 	build problems with xsrc.
    522 
    523 20100522:
    524 	private section of <ctype.h> was splitted, and now mklocale(1)
    525 	include ctype_local.h, so you have to make cleandir in tools/mklocale.
    526 
    527 20100520:
    528 	The location of the xkb compiled descriptions has changed.  Please
    529 	remove usr/X11R7/lib/X11/xkb/compiled from your $DESTDIR.
    530 
    531 20100222:
    532 	The shared objects file extension has been changed from .so to
    533 	.pico, in order to avoid conflicts with shared libraries names
    534 	libXX.so.  All now stale regular .so files can be removed from
    535 	your object directories.
    536 
    537 20100204:
    538 	The termcap database has been removed from the sources,
    539 	but has not been marked obsolete so it is not removed
    540 	from the system when upgrading.
    541 	As such, you will need to remove them from your object
    542 	and destination directories.
    543 
    544 20091101:
    545         After updating, it may be necessary to make the 'cleandir'
    546         target in src/tools/yacc/ and in src/usr.bin/yacc/ before a
    547         'build.sh -u tools' or 'build.sh -u distribution'.  Ditto
    548         src/tools/lex/ and src/usr.bin/lex/.
    549 
    550 20091001:
    551 	On amd64 you must rebuild tools (to get the new binutils)
    552 	before building a kernel, or the build fails on cpufunc.S.
    553 
    554 20091001:
    555 	An error will create a ./usr/X11R7/lib/X11/xkb/compiled/xkb
    556 	symlink, failing the build.  Delete the link, and the subdir
    557 	it is in, and retry your build.
    558 
    559 20090718:
    560 	libc build changed so that strchr() provides the extra entry
    561 	point for index().  Update build of libc.a (and libc_pic.a)
    562 	may fail because the archive contains the unwanted index.o.
    563 	(Similarly for strrchr() and rindex().)
    564 
    565 20090709:
    566 	Native Xorg was upgraded again.  Builds will probably fail again
    567 	without a clean objdir, at least for src/external/mit/xorg.
    568 
    569 20090616:
    570 	Native Xorg was upgraded.  Builds will need a clean objdir for
    571 	src/external/mit/xorg.  Upgrading a system from sets will not
    572 	work properly yet as the /usr/X11R7/lib/X11/xkb/symbols/pc
    573 	subdirectory has been changed into a file, and this needs to
    574 	be manually "rm -r"'ed before installing xbase.tgz.
    575 
    576 20090501:
    577 	Several new functions were added to string.h/libc, and this
    578 	can cause autoconf problems during the tool build for people
    579 	who fail to clean out their tools objects properly.  If you
    580 	note messages about stpcpy, stpncpy or strnlen accompanying a
    581 	failure during the tool build, clean out all your tools
    582 	objects and start again.
    583 
    584 20090325:
    585 	The i386 port was switched to i486 default toolchain.  This requires
    586 	cleaning your src/tools directory and $TOOLDIR and rebuilding them.
    587 
    588 20090126:
    589 	The __posix_fadvise50 system call changed assembly stub type.  You
    590 	need to 'rm -f __posix_fadvise50.*' in the libc build directory
    591 	to avoid using the old assembly stub.
    592 
    593 20090202:
    594 	pkg_install now depends on the pkgdb cache for automatic conflict
    595 	detection.  It is recommented to rebuild the cache with
    596 	``pkg_admin rebuild''.
    597 
    598 20090110:
    599 	time_t and dev_t have been bumped to 64 bit quantities.  To upgrade:
    600 	1. Make sure your kernel has COMPAT_50 in it.  Build and install.
    601 	   This is needed even in the MODULAR kernel because there is
    602 	   conditionally compiled code in rtsock.c.
    603 	2. make sure build.sh completes and the binaries in a chroot work
    604 	   before installing.
    605 	3. If you don't use build.sh and you build directly to root, and
    606 	   your build breaks in the middle, don't despair.  Make sure headers
    607 	   are installed properly, and start building libraries first libc
    608 	   and libutil, install them and then continue building all the
    609 	   libraries in src/lib and src/gnu/lib and install them.  Once
    610 	   the new libraries are installed, you can restart the build.
    611 	4. If you compile packages and you notice link time warnings,
    612 	   rebuild the required packages to update their shared libraries.
    613 	   Any package you rebuild will require rebuilding all the packages
    614 	   that depend on it.
    615 	5. Next time you run pwd_mkdb with the new binary, the file
    616 	   will be upgraded and it will not be backwards compatible.
    617 	6. The utmpx/wtmpx files (/var/run/utmpx and /var/log/wtmpx, see
    618 	   lastlogx(5)) have been versioned, and there is a heuristic
    619 	   for utmp.  You are better off removing the old files after
    620 	   upgrading.  The automated clearing of /var/run during
    621 	   boot, and the automated rotating of files in /var/log by
    622 	   newsyslog(8), may mean that you do not have to remove the
    623 	   files manually.
    624 	7. The optional accounting file (/var/account/acct, see
    625 	   accton(8)) has not been versioned, and will need to be
    626 	   removed.  The automatic rotation of the accounting file by
    627 	   /etc/daily limits the bad consequences of failure to remove
    628 	   the file.
    629 	8. Application software that writes time_t to binary files on
    630 	   disk will break or need attention.  Most notably: if you are
    631 	   using PostgreSQL < 8.4, you need to dump your databases,
    632 	   rebuild PostgreSQL with the new time_t, then restore.
    633 
    634 20081219:
    635 	config(1) has been updated, and one of the files it creates -
    636 	swapnetbsd.o - has changed format.  You need to rebuild config
    637 	(done automatically by build.sh) and then you need to rerun
    638 	config on all kernel configuration files before rebuilding those
    639 	kernels.
    640 
    641 20081205:
    642 	If you build with MKX11=no, you should remove /etc/rc.d/xdm and
    643 	/etc/rc.d/xfs from DESTDIR because those files were moved to the xetc
    644 	set and will appear as extra files for MKX11=no update builds.
    645 
    646 20081122:
    647 	On i386, various kernel options(4) in GENERIC including
    648 	file systems have been disabled and moved into kernel modules.
    649 	Before trying a new GENERIC kernel, you have to prepare the
    650 	following files as well as a new GENERIC kernel:
    651 
    652 	- build and install kernel modules from src/sys/modules
    653 
    654 	- install the latest bootloader, which will load a module
    655 	  for the file system from which the kernel is loaded automatically
    656 
    657 	If you have to load your kernel from a file system which is not of
    658 	the same type as the root file system, you have to load the necessary
    659 	file system module manually on the boot prompt or in the boot.cfg file.
    660 
    661 20080827:
    662 	If you built and installed a libc from sources between
    663 	2008/08/20 and 2008/08/26 you got a broken strtouq(3)
    664 	which results in false errors reported by lint(1).
    665 	Since this breaks the libc build itself, manual help is
    666 	needed -- lint must be disabled temporarily, e.g.:
    667 	  $ (cd lib/libc && make MKLINT=no dependall install)
    668 
    669 20080813:
    670 	MKDEBUG build was broken because the .depend files did not know
    671 	about .go files.  You need to remove all .depend files and rebuild.
    672 
    673 20080802:
    674 	A regression in binary compatibility for pthread_mutex_t has
    675 	been fixed.  Unfortunately, the price is breaking compatibility
    676 	for -current.
    677 
    678 	Threaded programs (using libpthread) and C++ programs (using
    679 	libstdc++) compiled after 20070907 and before 20080802 need to
    680 	be recompiled.
    681 
    682 	One way to find affected pkgsrc packages:
    683 
    684 	  $ grep REQUIRES=/usr/lib/libpthread /var/db/pkg/*/+BUILD_INFO
    685 	  $ grep REQUIRES=/usr/lib/libstdc++ /var/db/pkg/*/+BUILD_INFO
    686 
    687 20080731:
    688 	WAPBL (metadata journaling support) has been added, but at this
    689 	time isn't backwards compatible with pre-WAPBL aware kernels
    690 	and userland (fsck_ffs in particular).  Please make sure you
    691 	don't use a journaled filesystem with an older kernel/userland,
    692 	especially an uncleanly mounted journaled filesystem.  WAPBL
    693 	also requires the super block to be in the UFS2 format.  You
    694 	can use fsck_ffs -c 4 to update the superblock format.
    695 
    696 20080721:
    697 	Assembler warnings are now fatal if $WARNS>0 and $NOGCCERROR
    698 	isn't defined.
    699 
    700 20080531:
    701 	The ioctl number of DRVSUSPENDDEV command on /dev/drvctl changed
    702 	from 125 (conflicted with DRVCTLCOMMAND) to 129.  The drvctl(8)
    703 	utility needs to be rebuilt and reinstalled as older binaries
    704 	won't work correctly.  The following sequence of commands:
    705 
    706 	  $ (cd sys/sys/ && nbmake-$arch includes)
    707 	  $ (cd sbin/drvctl/ && nbmake-$arch clean)
    708 	  $ (cd sbin/drvctl/ && nbmake-$arch all)
    709 
    710 	leaves new drvctl utility in sbin/drvctl build directory.
    711 
    712 20080503:
    713 	The <bsd.lib.mk> variable MKPRIVATELIB was renamed to LIBISPRIVATE.
    714 
    715 20080521:
    716 	For a while, unprivileged UPDATE builds would fail to
    717 	succeed at the checkflist stage, complaining that
    718 	${DESTDIR}/stand/<arch>/ did not exist.  A fix for this
    719 	problem was committed to share/mk/bsd.kmodule.mk, revision 1.9.
    720 	If you already hit this problem, update the .mk file,
    721 	remove ${DESTDIR}/stand/<arch>, and re-run the build.
    722 
    723 20080303:
    724 	Linker warnings are now fatal if $WARNS>0.
    725 
    726 20080126:
    727 	The posix_fadvise system call has been changed from an assembly
    728 	stub, to a c file that calls an assembly stub.  You need to
    729 	'rm -f posix_fadvise.* .depend' in the libc build directory to
    730 	avoid using the old assembly stub.
    731 
    732 20071209:
    733 	The acpiec(4) driver has been split into two attachments.  If you
    734 	get ACPI errors before the attachment, please update your kernel
    735 	configuration file appropriately or see GENERIC for more details.
    736 
    737 20071115:
    738 	The it(4) driver has been renamed to itesio(4) and the old port
    739 	argument specified in the kernel configuration file is not valid
    740 	anymore.  The itesio(4) driver now uses the Super I/O address port
    741 	rather than the EC address port.  Please update your kernel
    742 	configuration file appropriately or see GENERIC for more details.
    743 
    744 20071028:
    745 	The pccons(4) driver has been removed from the NetBSD/shark port.
    746 	You need to update any custom kernel configuration file you have
    747 	to remove any references to pccons (which includes removing the
    748 	now useless XSERVER option) and replace them with the correct
    749 	entries for the wscons driver.  See the GENERIC configuration file
    750 	for more details.
    751 
    752 20070913:
    753 	A latent bug in dhclient/dhcpd that caused it to be unable to
    754 	enumerate interfaces was fixed.  The bug began to cause
    755 	problems after 20070911 when the kernel's SIOCGIFCONF
    756 	implementation was repaired.  From 20070529 to 20070911 racoon
    757 	could not enumerate interfaces.  (These are noted because
    758 	normal kernel/userspace version matching hygiene is not
    759 	sufficient to avoid this problem.)  Ensure that both kernel
    760 	and userland are from after 20070913.
    761 
    762 20070703:
    763 	nbinstall has been renamed ${MACHINE_GNU_ARCH}-install.  It
    764 	calls the target-specific strip program, and the logic to pass
    765 	down STRIP from make has been removed.  This requires a
    766 	re-installation of tools.
    767 
    768 20070422:
    769 	The way OS emulations lookup filenames inside the emulation root
    770 	has been changed.  Rather than modify the pathname (and copy back
    771 	to userspace) namei() and lookup() directly check the emulation
    772 	root.  One side effect is that absolute symlinks inside the emulated
    773 	root file system will be relative to that file system - unless they
    774 	start /../ this is useful when the emulated root is a real install
    775 	that has such links.
    776 	This might affect symlinks that have been added to reference outside
    777 	the emulated root.
    778 
    779 20070412:
    780 	The pckbc driver on sgimips IP32 has been removed.  Use macekbc
    781 	instead.  See the GENERIC32_IP3x kernel configuration for an
    782 	example.
    783 
    784 20070319:
    785         src/lib/libc/Makefile revision 1.129 broke libc and ld.elf_so
    786         on many platforms due to incorrect flags settings.  If you
    787         updated and built after about 20070315, do "nbmake-$arch
    788 	cleandir" in src/lib/libc and src/libexec/ld.elf_so to force a
    789 	rebuild of object files that might have been built
    790 	incorrectly, and ensure that you have at least
    791 	src/lib/libc/Makefile 1.130.
    792 
    793 20070210:
    794         src/sys/sys/{sa.h,savar.h} were removed.
    795           find ${OBJDIR} \( -name .depend -o -name '*.d' \) -print \
    796               | xargs egrep -l '/sa.h|/savar.h' | xargs rm
    797         will allow dependencies on those files to get get rebuilt
    798 
    799 20070209:
    800         The threading model was changed when the newlock2 branch
    801         was merged to NetBSD-current.  If you boot with a new
    802         kernel (version 4.99.10), then you also need a new pthread
    803         library (/usr/lib/libpthread.so.0.7).  If you boot with
    804         an old kernel, then you need the old pthread library
    805         (/usr/lib/libpthread.so.0.6).  Provided you keep the kernel and
    806         the pthread library in sync, old threaded applications should
    807         continue to work with an old or new kernel.  Note that named(8)
    808 	is the only threaded application in the base system.
    809 
    810 20061214:
    811 	Following the move of string_to_flags() and flags_to_string()
    812 	from the bin/ls/ sources to libutil, users doing UPDATE builds
    813 	will need to do a "make cleandir" in
    814 		tools/mtree/, tools/makefs/, tools/binstall/, tools/pax/,
    815 		bin/pax/, bin/ls/, usr.sbin/mtree/, usr.sbin/makefs/,
    816 		usr.bin/xinstall/, libexec/ftpd/, rescue/, as well
    817 		as the installation images in distrib/
    818 	in order to excise stale references to the old stat_flags.h header
    819 	file in the ls sources -- stat_flags.h has been removed.
    820 
    821 20061108:
    822 	The configure script used in the src/tools/gcc compiler has been
    823 	changed to indicate that our libc has ssp support built-in and
    824 	does not depend on -lssp and -lssp-nonshared.  You'll need to
    825 	make clean in src/tools/gcc first to rebuild the compiler.
    826 
    827 20061009:
    828 	The sysctl variables net.inet{,6}.tcp{,6}.newreno are no longer
    829 	available.  Use net.inet{,6}.tcp{,6}.congctl.selected instead.
    830 
    831 20060814:
    832 	The vt, vidcconsole, kbd, and rpckbd drivers on acorn32 have been
    833 	withdrawn.  Use vidcvideo and pckbd instead.  See the GENERIC
    834 	kernel configuration for an example.  X servers from the last
    835 	few years should cope.
    836 
    837 20060703:
    838 	MPACPI is no more.  We always configure PCI interrupts using ACPI
    839 	if we have an ACPI kernel.  The option MPACPI_SCANPCI has been renamed
    840 	to ACPI_SCANPCI.  Thanks to work from fvdl.
    841 
    842 20060627:
    843 	socket(2) has changed, and its system call has been versioned.
    844 	For userlands with the old version of socket(2), make sure that
    845 	your kernel has 'options COMPAT_30' set, or else 'bad system call'
    846 	errors will result.
    847 
    848 Hints for a more successful build:
    849 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    850     Use build.sh, but do not use its "expert mode":
    851 	This will automatically build the tools in the
    852 	   correct order, and it will keep the tools and the
    853 	   new build products from interfering with the running
    854 	   system.  This will allow you to ignore most of the
    855 	   other advice in this file.
    856     Build a new kernel first:
    857 	This makes sure that any new system calls or features
    858 	   expected by the new userland will be present.  This
    859 	   helps to avoid critical errors when upgrading.
    860     Use object directories:
    861 	This helps to keep stale object
    862 	   files from polluting the build if a Makefile "forgets"
    863 	   about one.  It also makes it easier to clean up after
    864 	   a build.  It's also necessary if you want to use the
    865 	   same source tree for multiple machines.
    866 	   To use object directories with build.sh:
    867 	    a) invoke build.sh with the "-M" or "-O" options.
    868 	   To use object directories without using build.sh:
    869 	    a) cd /usr/src ; make cleandir
    870 	    b) Add "OBJMACHINE=yes" to /etc/mk.conf
    871 	    c) Add "MKOBJDIRS=yes" to /etc/mk.conf
    872 	    d) cd /usr/src ; make build
    873 	   Note that running "make obj" in a directory will create
    874 	   in obj.$MACHINE directory.
    875     Build to a DESTDIR:
    876 	This helps to keep old installed files (especially libraries)
    877 	   from interfering with the new build.
    878 	   To build to a DESTDIR with build.sh, use the "-D" option.
    879 	   To build to a DESTDIR without using build.sh, set the DESTDIR
    880 	   environment variable before running make build.  It should be
    881 	   set to the pathname of an initially empty directory.
    882 	   Problems: if you do not use build.sh, you might need to
    883 		update critical utilities without using DESTDIR since
    884 		nothing is executed from what is installed in DESTDIR.
    885 		(See critical utils, below.)
    886     Build often:
    887 	This keeps critical utilities current enough to not choke
    888 	on any other part of the source tree that depends on up to
    889 	date functionality.  If you use build.sh, you should not have
    890 	this problem.
    891 
    892 What to do if things don't work:
    893 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    894 When things don't work there are usually a few things that commonly
    895 should be done.
    896     1)	make includes
    897 	This should be done automatically by make build.
    898     2)  cd share/mk && make install
    899 	Again, automatically done by make build.
    900 
    901 Failsafe rebuild of a small part of the tree:
    902 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    903 To make sure you rebuild something correctly you want to do
    904 something like the following:
    905     1)  Make sure the includes and .mk files are up to date.
    906     2)  Make sure any program used to build the particular
    907 	utility is up to date.  (yacc, lex, etc...)
    908     3)  cd ...path/to/util...
    909 	make cleandir
    910 	rm ...all obj directories...
    911 	make cleandir			# yes, again
    912 	make obj
    913 	make depend && make
    914 
    915 Failsafe rebuild of the entire tree:
    916 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    917 If you really want to make sure the source tree is clean and
    918 ready for a build try the following.  Note that sourcing /etc/mk.conf
    919 (a make(1) Makefile) in this manner is not right, and will not work
    920 for anyone who uses any make(1) features in /etc/mk.conf.
    921 
    922 ---cut here---
    923 #!/bin/sh
    924 . /etc/mk.conf
    925 
    926 if [ -z $NETBSDSRCDIR ] ; then
    927     NETBSDSRCDIR=/usr/src
    928 fi
    929 if [ \! -d $NETBSDSRCDIR ] ; then
    930     echo Unable to find sources
    931     exit 1
    932 fi
    933 find $NETBSDSRCDIR -name \*.o -o -name obj.\* -o -name obj -exec rm \{\} \;
    934 
    935 if [ -z $BSDOBJDIR ] ; then
    936     BSDOBJDIR=/usr/obj
    937 fi
    938 if [ -d $BSDOBJDIR ] ; then
    939     rm -rf $BSDOBJDIR
    940 fi
    941 
    942 cd $NETBSDSRCDIR && make cleandir
    943 
    944 ---cut here---
    945 
    946 Critical utilities:
    947 ^^^^^^^^^^^^^^^^^^^
    948 	usr.bin/compile_et
    949 	usr.bin/make
    950 	usr.bin/yacc
    951 	usr.bin/lex
    952 	usr.bin/xlint
    953 	usr.bin/config
    954 
    955 Other problems and possible solutions:
    956 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    957 Symptom:Complaints involving a Makefile.
    958 Fix:	Rebuild usr.bin/make:
    959 	cd usr.bin/make && make && make install
    960 	Or, a failsafe method if that doesn't work:
    961 	cd usr.bin/make && cc *.c */*.c -I . -o make && mv make /usr/bin
    962 
    963 Fix:	Make sure .mk files are up to date.
    964 	cd share/mk && make install
    965 
    966 Symptom:Kernel `config' fails to configure any kernel, including GENERIC.
    967 Fix:	Rebuild usr.bin/config
    968 
    969 Symptom:
    970 Fix:	Rebuild usr.bin/yacc
    971 
    972 Symptom:
    973 Fix:	Rebuild usr.bin/lex
    974 
    975 Symptom:
    976 Fix:	rm /usr/lib/libbfd.a
    977 
    978 Symptom:Obsolete intermediate files are used during compilation
    979 Fix:	Try the following sequence of commands in the directory in question.
    980 	make cleandir; rm `make print-objdir`; make cleandir; make obj
    981 	(If you built the tree without "make obj" in the past, obsolete files
    982 	may remain.  The command tries to clean everything up)
    983 
    984 Symptom:.../sysinst/run.c:xx: warning: initialization from incompatible
    985 	pointer type
    986 Fix:	Rebuild and install usr.bin/menuc
    987 
    988 Symptom:mklocale not found during build in share/locale/ctype
    989 Fix:	Build and install usr.bin/mklocale
    990 
    991 Symptom:undefined reference to `__assert13' or `__unsetenv13'
    992 Fix:    Rebuild and install lib/libc
    993 
    994 Symptom:usr.bin/config fails to build.
    995 Fix:	Try building with -DMAKE_BOOTSTRAP added to CFLAGS in Makefile.
    996 
    997 Symptom:undefined reference to `getprogname' or `setprogname'
    998 Fix:    Rebuild and install lib/libc
    999 
   1000 Symptom:lint does not understand the '-X' option
   1001 Fix:    May need to build & install libs with NOLINT=1 before rebuilding lint
   1002 
   1003 Symptom:Update build fails in src/tools/gcc complaining that a variable
   1004 	(e.g. CPPFLAGS) has changed since the previous run.
   1005 Fix:    Run "nbmake-${ARCH} clean" in src/tools/gcc or do a clean build.
   1006 
   1007 Symptom:cvs [update aborted]: cannot open directory /cvsroot/src/...:
   1008 	No such file or directory.
   1009 Cause:	If a directory is created by mistake, then it is sometimes
   1010 	deleted from the CVS repository using administrative commands
   1011 	that bypass the normal cvs access controls.  If your cvs working tree
   1012 	contains references to a directory that has been deleted on the
   1013 	server in this way, then "cvs update" reports this error.
   1014 Fix:	Recursively delete the affected directory from your working tree
   1015 	and try the update again.
   1016