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UPDATING revision 1.307
      1 $NetBSD: UPDATING,v 1.307 2020/03/11 21:07:40 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 20200311:
     23 	GCC 8 ports will need cleaning in src/tools/gcc and
     24 	src/external/gpl3/gcc due to GCC 8.4 update.
     25 
     26 20191118:
     27 	More architectures were switched to gcc8:
     28 	    i386, ia64 powerpc64, sparc, sparc64, arm
     29 	The same comments as in 20191022 apply.
     30 
     31 20191112:
     32 	The LLVM update requires a clean rebuild for all architectures using
     33 	LLVM during the tools build phase (i386, amd64, aarch64).
     34 
     35 20191022:
     36 	Ports amd64 and aarch64 switched to GCC 8.3 by default.
     37 	In-place ("expert mode", build.sh -E) builds are not supported
     38 	when going from a GCC 7 userland to GCC 8. Do a regular
     39 	build to a different DESTDIR (or preferably: build.sh -U) at least
     40 	once and install sets, or download comp.{tar.xz,tgz} from the
     41 	daily builds and install that before doing the next in-place build.
     42 
     43 20191001:
     44 	GCC 8.3 was imported.  Builds of src/tools/gcc may fail if
     45 	old builds with GCC 7 output now uses GCC 8.  Clean this
     46 	directory, and also clean src/external/gpl3/gcc.
     47 
     48 20190903:
     49 	Files with names that coincide with existing files' names on
     50 	case-insensitive file systems were inadvertently committed, for
     51 	radeon GPU firmware.  We cannot mark these as obsolete for
     52 	postinstall to fix, so if you updated src since 2019-08-26, and
     53 	ran build.sh distribution or ran build.sh release, you must
     54 	manually delete the following files in your DESTDIR (which is
     55 	usually $OBJDIR/destir.$ARCH), or from / if you have installed
     56 	them:
     57 
     58 		/libdata/firmware/radeon/bonaire_ce.bin
     59 		/libdata/firmware/radeon/bonaire_mc.bin
     60 		/libdata/firmware/radeon/bonaire_me.bin
     61 		/libdata/firmware/radeon/bonaire_mec.bin
     62 		/libdata/firmware/radeon/bonaire_pfp.bin
     63 		/libdata/firmware/radeon/bonaire_rlc.bin
     64 		/libdata/firmware/radeon/bonaire_sdma.bin
     65 		/libdata/firmware/radeon/bonaire_smc.bin
     66 		/libdata/firmware/radeon/bonaire_uvd.bin
     67 		/libdata/firmware/radeon/hainan_ce.bin
     68 		/libdata/firmware/radeon/hainan_mc.bin
     69 		/libdata/firmware/radeon/hainan_me.bin
     70 		/libdata/firmware/radeon/hainan_pfp.bin
     71 		/libdata/firmware/radeon/hainan_rlc.bin
     72 		/libdata/firmware/radeon/hainan_smc.bin
     73 		/libdata/firmware/radeon/hawaii_ce.bin
     74 		/libdata/firmware/radeon/hawaii_mc.bin
     75 		/libdata/firmware/radeon/hawaii_me.bin
     76 		/libdata/firmware/radeon/hawaii_mec.bin
     77 		/libdata/firmware/radeon/hawaii_pfp.bin
     78 		/libdata/firmware/radeon/hawaii_rlc.bin
     79 		/libdata/firmware/radeon/hawaii_sdma.bin
     80 		/libdata/firmware/radeon/hawaii_smc.bin
     81 		/libdata/firmware/radeon/kabini_ce.bin
     82 		/libdata/firmware/radeon/kabini_me.bin
     83 		/libdata/firmware/radeon/kabini_mec.bin
     84 		/libdata/firmware/radeon/kabini_pfp.bin
     85 		/libdata/firmware/radeon/kabini_rlc.bin
     86 		/libdata/firmware/radeon/kabini_sdma.bin
     87 		/libdata/firmware/radeon/kaveri_ce.bin
     88 		/libdata/firmware/radeon/kaveri_me.bin
     89 		/libdata/firmware/radeon/kaveri_mec.bin
     90 		/libdata/firmware/radeon/kaveri_mec2.bin
     91 		/libdata/firmware/radeon/kaveri_pfp.bin
     92 		/libdata/firmware/radeon/kaveri_rlc.bin
     93 		/libdata/firmware/radeon/kaveri_sdma.bin
     94 		/libdata/firmware/radeon/mullins_ce.bin
     95 		/libdata/firmware/radeon/mullins_me.bin
     96 		/libdata/firmware/radeon/mullins_mec.bin
     97 		/libdata/firmware/radeon/mullins_pfp.bin
     98 		/libdata/firmware/radeon/mullins_rlc.bin
     99 		/libdata/firmware/radeon/mullins_sdma.bin
    100 		/libdata/firmware/radeon/oland_ce.bin
    101 		/libdata/firmware/radeon/oland_mc.bin
    102 		/libdata/firmware/radeon/oland_me.bin
    103 		/libdata/firmware/radeon/oland_pfp.bin
    104 		/libdata/firmware/radeon/oland_rlc.bin
    105 		/libdata/firmware/radeon/oland_smc.bin
    106 		/libdata/firmware/radeon/pitcairn_ce.bin
    107 		/libdata/firmware/radeon/pitcairn_mc.bin
    108 		/libdata/firmware/radeon/pitcairn_me.bin
    109 		/libdata/firmware/radeon/pitcairn_pfp.bin
    110 		/libdata/firmware/radeon/pitcairn_rlc.bin
    111 		/libdata/firmware/radeon/pitcairn_smc.bin
    112 		/libdata/firmware/radeon/tahiti_ce.bin
    113 		/libdata/firmware/radeon/tahiti_mc.bin
    114 		/libdata/firmware/radeon/tahiti_me.bin
    115 		/libdata/firmware/radeon/tahiti_pfp.bin
    116 		/libdata/firmware/radeon/tahiti_rlc.bin
    117 		/libdata/firmware/radeon/tahiti_smc.bin
    118 		/libdata/firmware/radeon/verde_ce.bin
    119 		/libdata/firmware/radeon/verde_mc.bin
    120 		/libdata/firmware/radeon/verde_me.bin
    121 		/libdata/firmware/radeon/verde_pfp.bin
    122 		/libdata/firmware/radeon/verde_rlc.bin
    123 		/libdata/firmware/radeon/verde_smc.bin
    124 
    125 	We will re-import these radeon firmware images another way
    126 	later.
    127 
    128 20190727:
    129 	The uefi bootloader has gained tftp support and needs a clean
    130 	build. If you do update builds, manually clean its object
    131 	directory by something like:
    132 	cd sys/arch/i386/stand/efiboot && make clean
    133 
    134 20190723:
    135 	The jemalloc allocator in libc is now build without extended
    136 	debugging (for performance reasons). In update builds make sure
    137 	to rebuild it completly, by removing all affected object files,
    138 	including compat builds, something like:
    139 	cd /usr/obj && find . -type d -name jemalloc|xargs rm -rf
    140 
    141 20190207:
    142 	GCC 7 switched for many ports.  Update builds are likely to fail.
    143 
    144 20180924:
    145 	A newer OpenSSL version has been imported. If you are doing
    146 	update builds, make sure to remove all old obj dirs, like:
    147 	cd /usr/obj && find . -type d -name openssl | xargs rm -rf
    148 
    149 20180717:
    150 	On aarch64 int64_t and related types have changed from long long
    151 	to long. This requires recompiling all C++ binaries.
    152 
    153 20180713:
    154 	On amd64 and i386 static binaries are now build position
    155 	independend. This requires recompilation of all object
    156 	files used to create the crunched /rescue binary.
    157 	Clean the rescue directory in your obj directory before
    158 	doing an update build, otherwise linking will fail.
    159 
    160 20180414:
    161 	Existing binutils was migrated to binutils.old.  Manual
    162 	removal of tools/binutils objects directory may be required
    163 	to fix tools build failure.
    164 
    165 20180311:
    166 	bdftopcf was updated and may need cleaning in the
    167 	src/external/mit/xorg/tools/bdftopcf subdirectory if there are
    168 	link errors.
    169 
    170 20180212:
    171 	between OpenSSL and GCC updates, many things may fail to build.
    172 	any failure that looks like GCC or openssl is best handled by
    173 	a clean destdir and objdir.  Full cleandir and destdir deletion
    174 	is recommended if build failures occur.
    175 
    176 20171225:
    177 	removal of the vadvise syscall requires manual removal of all
    178 	associated files from the libc build object directory (including
    179 	the .depend files) - a command like:
    180 		cd $OBJ && find . -type d -name libc | xargs rm -rf
    181 	For architectures that support multiple "compat" binary targets,
    182 	you'll need to cleanup both the regular libc directory and the
    183 	compat ones (the above command will do that).
    184 
    185 20171010:
    186 	a change to the build structure of external/bsd/acpica/bin/iasl
    187 	means that its objdir (or *.d and .depend at least) might need
    188 	to be manually removed - or a build done once without -u.
    189 
    190 20170822:
    191 	a new version of GMP has been imported and probably
    192 	will break parts of builds related to themselves or GCC, both
    193 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    194 	and MPC objdirs or build once without -u.
    195 
    196 20170816:
    197 	a new version of MPFR and MPC have been imported and probably
    198 	will break parts of builds related to themselves or GCC, both
    199 	in the tools and the native section.  Remove all GCC, GMP, MPFR
    200 	and MPC objdirs or build once without -u.
    201 
    202 20170402:
    203 	a new version of dhcpcd has been imported, which does not support
    204 	update builds from the previous version. Remove your
    205 	external/bsd/dhcpcd object dir or build once without -u.
    206 
    207 20170211:
    208 	a new terminfo database has been imported.
    209 	The structure of it has changed slightly from prior versions and
    210 	an updated tic tool is required.
    211 	If you build.sh, don't use -u
    212 
    213 20170207:
    214 	various arch dependent libc/exect.S files were removed
    215 	Either remove the obj directories (lib/libc and compat/amd64/i386/lib
    216 	if it exists) or do a clean build.
    217 	(This is a bug in the make system, it should be corrected without
    218 	human intervention, but isn't.)
    219 
    220 20170104:
    221 	xinput build options have changed.
    222 	Remove the obj directory (external/mit/xorg/bin/xinput)
    223 	if you build.sh -u
    224 
    225 20170103:
    226 	a new version of flex has been imported.
    227 	Remove the file from obj (external/bsd/flex)
    228 	if you build.sh -u
    229 
    230 20161014:
    231 	a new version of OpenSSL has been imported.
    232 	Remove the files from obj (crypto/external/bsd/openssl) 
    233 	if you build.sh -u
    234 
    235 20161009:
    236 	a new version of dhcpcd has been imported with slightly changed
    237 	build infrastructure. When doing a build.sh -u this requires
    238 	pruning the external/bsd/dhcpcd objdir.
    239 
    240 20160914:
    241 	i386, amd64, shark, ofppc and macppc have joined shark and x68k
    242 	ports in using xorg-server 1.18. This requires a clean destdir
    243 	and a clean objdir.
    244 
    245 20160527:
    246 	i386 needs a full cleandir or objdir deletion because PIE has
    247 	been enabled. (see the amd64 entry two down for further info)
    248 
    249 20160418:
    250 	libedit needs manual removal of all autogenerated files since
    251 	some of them are not autogenerated anymore. Remember that there
    252 	might be two copies of libedit if your platform builds "compat".
    253 
    254 20160410:
    255 	amd64 needs full "make cleandir" or deletion of objdir now that
    256 	PIE has been enabled for amd64.  PIE, or position-independent
    257 	executables, means all code, including executables and not just
    258 	shared libraries, is position-independent and hence able to be
    259 	relocated by ASLR, address space layout randomization.
    260 
    261 	The change was made in Makefile variables for compiler and
    262 	linker flags, for which make(1) does not record dependencies,
    263 	hence it is unable to detect that all .o files need rebuilding.
    264 
    265 	Partial rebuilds with some modified source files will likely
    266 	fail when linking executables, since the linker refuses to mix
    267 	position-independent code with position-dependent code in
    268 	position-independent executables:
    269 
    270 		.../x86_64--netbsd/bin/ld: foo.o: relocation R_X86_64_32 against `...' cannot be used when making a shared object; recompile with -fPIC
    271 
    272 20160401:
    273 	Ports switching to GCC 5.3 will need a full "make cleandir".
    274 	Some people have found that cleandir is not sufficient, so if
    275 	in doubt delete the entire object directory tree for gcc.
    276 
    277 20160306:
    278 	NetBSD's regexp implementation is now part of libnbcompat.
    279 	Nblex, nbm4, nbpax, nbsed use it and they may crash on
    280 	non-NetBSD hosts if linked with stale object files produced
    281 	while they included a non-NetBSD regex.h.
    282 	In any case, you should "make cleandir" at least these tools
    283 	before updating your toolchain.
    284 
    285 20160125:
    286 	Dtrace has been enabled by default on some architectures.
    287 	When doing an update build, make sure to clean the etc/mtree
    288 	object directory before starting the build - otherwise the
    289 	needed directories in destdir will not be created.
    290 	An easy way to do this is:
    291 	   cd src/etc/mtree && $TOOLDIR/bin/nbmake-$arch cleandir
    292 
    293 20150818:
    294 	New acpica requires "make cleandir" in src/external/bsd/acpica
    295 	again.
    296 
    297 20150413:
    298 	New acpica requires "make cleandir" and reinstalling yacc
    299 	in /usr/src/external/bsd/byacc and /usr/src/tools/yacc and
    300 	also "make cleandir" in /usr/src/external/bsd/acpica.
    301 
    302 20150404:
    303 	Lint changes require a full rebuild of the tool, so make
    304 	sure to build without -u option to build.sh, or manually
    305 	do a make cleandir in src/tools/lint1 and
    306 	src/usr.bin/xlint.
    307 
    308 20150310:
    309 	Improvements to openssl for arm mean that update builds of
    310 	the openssl libraries will fail. A make cleandir in
    311 	external/bsd/openssl/lib is needed
    312 
    313 20141026:
    314 	A mishap during the import of pppd may cause your corruption
    315 	in your cvs directory if you happened to do a cvs update
    316 	during a short period of time. To fix, just remove the
    317 	directory src/external/bsd/ppp/dist/pppd completely
    318 	and let cvs restore it on next update.
    319 
    320 20140721:
    321 	The src/external/mit/lua/src directory was accidentally created
    322 	and then deleted in the CVS repository.  If you get errors like
    323 
    324 	cvs [update aborted]: cannot open directory
    325 	/cvsroot/src/external/mit/lua/src: No such file or directory
    326 
    327 	then delete your local copy of that directory tree and try again.
    328 
    329 20140530:
    330 	ARM eABI switched to DWARF based exception handling. This requires
    331 	rebuilding all C++ code. It is strongly advised to do a clean build.
    332 
    333 20140131:
    334 	The new compiler_rt/libc integration moved a few things. It is strongly
    335 	advised to do a clean build. At least lib/libc, the compat version(s)
    336 	of libc, libkern, rump and the kernels need to be cleaned.
    337 
    338 20131227:
    339 	1. The new ntpd runs in a restricted mode to prevent amplification
    340 	   attacks. If you need ntpdc to work you need to explicitly enable
    341 	   mode7 in your config file. Make sure you put the necessary restrict
    342 	   statements to avoid being exposed.
    343 	2. strncat has moved from lib/libc to common/lib/libc; you might need
    344 	   to make clean in libc
    345 
    346 20131129:
    347 	The GMP sources were updated, and builds will likely fail without
    348 	cleaning their build trees for both tools and in-tree, like below.
    349 
    350 20131128:
    351 	The MPC and MPFR sources were updated, and builds may require their
    352 	tools and in-tree directories cleaned for successful updates.
    353 
    354 20130605:
    355 	The kernel option FAST_IPSEC no longer exists, it's been renamed
    356 	to IPSEC (and the older IPSEC version removed).
    357 
    358 20130605:
    359 	Previous freetype installations eroneously installed private
    360 	header files. If you are building against a non-empty $DESTDIR,
    361 	please remove ${DESTDIR}//usr/X11R7/include/freetype2/freetype/.
    362 
    363 20130531:
    364 	The xdm update may cause build failure due to xdm.man being
    365 	in the obj tree.  Make sure to ensure any like this:
    366 		nbmake: nbmake: don't know how to make xdm.man. Stop
    367 	is fixed by deleting the xdm.man in the obj tree.
    368 
    369 20130530:
    370 	Updates of many xsrc packages will leave old .pc files around.
    371 	Best to clean out the xsrc objdir entirely before rebuilds.
    372 
    373 20130301:
    374 	The removal of netiso requires manual removal of /usr/include/netiso
    375 	prior to the build and make cleandir in /usr/src/usr.bin/{ktruss,kdump}
    376 
    377 20120726:
    378 	The update of OpenSSL requires cleaning both the OpenSSL build
    379 	directory and DESTDIR.  *Even non-update builds require cleaning
    380 	DESTDIR.* Builds done without taking these steps may fail, or in
    381 	some cases may succeed and install broken OpenSSL libraries that
    382 	cause third-party software to link incorrectly and/or crash.
    383 
    384 20120507:
    385 	The database schema for makemandb was changed.  You will
    386 	need to update the database using 'makemandb -f' or wait
    387 	for the next weekly run to fix it.
    388 
    389 20120319:
    390 	sys/conf/Makefile.kern.inc has been modified to adjust the
    391 	size of db_symtab automatically.  You need to update dbsym in
    392 	your $TOOLDIR to build kernels with options SYMTAB_SPACE.  If
    393 	you don't want this behavior, add AUTO_SYMTAB_SPACE=no to your
    394 	mk.conf.
    395 
    396 20120216:
    397 	Default for MKCATPAGES changed to NO.  Update builds will fail
    398 	unless DESTDIR is cleaned manually.  If you built between 20120207
    399 	and 20120216, daily and weekly could have created an unreadable
    400 	/var/db/man.db index for apropos.  Running makemandb -f or
    401 	the next run of weekly will fix it.
    402 
    403 20111227:
    404 	If you built between 20111225 and 20111227 you need to remove
    405 	/usr/lib/libpam.so.4* and /usr/lib/security/*.so.4, since the
    406 	bump has been reverted.
    407 
    408 20111125:
    409 	The "rnd" pseudodevice has been added to sys/conf/std, which
    410 	means it should no longer be explicitly listed in kernel
    411 	configuration files.  The line "pseudo-device rnd" should be
    412 	removed from any custom kernel config files users may have.
    413 
    414 20111119:
    415 	A problem with the datastructures used by the rndctl(8)
    416 	utility (pointers in datastructures in an array, making 32->64
    417 	bit compatibility very painful) has been fixed in a
    418 	non-backwards-compatible way.  If you replace your kernel,
    419 	replace your rndctl executable too.
    420 
    421 20111001:
    422 	the prop_*_send_syscall() functions from proplib(3) have been
    423 	changed and their new version is not backward compatible with the old
    424 	one.  So ensure that all consumers of these functions (currently:
    425 	quota2 code and its tests) are updated together with the new lib.
    426 
    427 20110817:
    428 	sparc has been changed to use GCC 4.5.3, so any objdir or
    429 	DESTDIR for them should be deleted before updating.
    430 
    431 20110806:
    432 	i386 and amd64 have been changed to use GCC 4.5.3, so any
    433 	objdir or DESTDIR for them should be deleted before updating.
    434 
    435 20110805:
    436 	The update to GCC 4.5.3 requires a non-trivial portion of
    437 	the tree to be cleaned.  Best to delete both objdir and
    438 	DESTDIR before running this update.  So far, only the
    439 	sparc64, mips and powerpc platforms have changed.
    440 
    441 20110803:
    442 	The layout of external/public-domain/xz has changed.  To do an
    443 	update build you will have to remove the contents of the OBJDIR
    444 	for external/public-domain/xz/bin by hand as the xz entry there
    445 	is now a directory.
    446 
    447 20110410:
    448 	The configuration of src/tools/gcc has changed.  To do an
    449 	update build you have to clean both tools/binutils and
    450 	tools/gcc by hand.
    451 
    452 20110328:
    453 	Building the Xorg binary was moved into a subdirectory to fix
    454 	ordering issues with "make all".  It may be necessary to remove
    455 	the OBJDIR for external/mit/xorg/server/xorg-server/hw/xfree86
    456 	if your update build fails, as the "Xorg" entry there is now a
    457 	directory.
    458 
    459 20110121:
    460 	Assembler files no longer use -traditional-cpp.  This can break
    461 	the build of individual parts of the tree.  This is handled
    462 	correctly by build.sh.  Manual builds have to update /usr/share/mk
    463 	and re-run config(1) for any kernel configurations as needed.
    464 
    465 20101217:
    466 	The tcpdump(8) program was changed to drop privileges and chroot(2)
    467 	by default.  It may be necessary to manually update passwd(5) and
    468 	group(5) in order to make the program work with existing setups.
    469 
    470 20101125:
    471 	The latest changes to setenv(3) dissallow setting environment
    472 	variables with names that contain '='.  Revision 1.18 of env.c
    473 	assumed that this was allowed.  Installing a new libc with an
    474 	old copy of /usr/bin/env causes env x=1 printenv | grep x= to
    475 	break which affects the autoconf tests for dependency finding,
    476 	so building gcc will end up printing:
    477 	    checking dependency style of gcc... none
    478 	    configure: error: no usable dependency style found
    479 	Fix it by rebuilding and re-installing env.
    480 
    481 20101119:
    482 	Recent Xorg updates in xsrc/external/mit/ may cause various build
    483 	or run-time problems.  Delete your entire DESTDIR and OBJDIR if you
    484 	have any build problems with xsrc, or problems with mismatched
    485 	versions between xorg-server and drivers.
    486 
    487 20100604:
    488 	The update of ATF to 0.9 causes old tests written in shell to fail
    489 	unless they are rebuilt.  If you are building with MKUPDATE=yes,
    490 	you need to clean the src/external/bsd/atf/tests/ and the src/tests/
    491 	trees by hand.
    492 
    493 20100522:
    494 	Recent Xorg updates in xsrc/external/mit/ will cause various build
    495 	problems.  Delete your entire DESTDIR and OBJDIR if you have any
    496 	build problems with xsrc.
    497 
    498 20100522:
    499 	private section of <ctype.h> was splitted, and now mklocale(1)
    500 	include ctype_local.h, so you have to make cleandir in tools/mklocale.
    501 
    502 20100520:
    503 	The location of the xkb compiled descriptions has changed.  Please
    504 	remove usr/X11R7/lib/X11/xkb/compiled from your $DESTDIR.
    505 
    506 20100222:
    507 	The shared objects file extension has been changed from .so to
    508 	.pico, in order to avoid conflicts with shared libraries names
    509 	libXX.so.  All now stale regular .so files can be removed from
    510 	your object directories.
    511 
    512 20100204:
    513 	The termcap database has been removed from the sources,
    514 	but has not been marked obsolete so it is not removed
    515 	from the system when upgrading.
    516 	As such, you will need to remove them from your object
    517 	and destination directories.
    518 
    519 20091101:
    520         After updating, it may be necessary to make the 'cleandir'
    521         target in src/tools/yacc/ and in src/usr.bin/yacc/ before a
    522         'build.sh -u tools' or 'build.sh -u distribution'.  Ditto
    523         src/tools/lex/ and src/usr.bin/lex/.
    524 
    525 20091001:
    526 	On amd64 you must rebuild tools (to get the new binutils)
    527 	before building a kernel, or the build fails on cpufunc.S.
    528 
    529 20091001:
    530 	An error will create a ./usr/X11R7/lib/X11/xkb/compiled/xkb
    531 	symlink, failing the build.  Delete the link, and the subdir
    532 	it is in, and retry your build.
    533 
    534 20090718:
    535 	libc build changed so that strchr() provides the extra entry
    536 	point for index().  Update build of libc.a (and libc_pic.a)
    537 	may fail because the archive contains the unwanted index.o.
    538 	(Similarly for strrchr() and rindex().)
    539 
    540 20090709:
    541 	Native Xorg was upgraded again.  Builds will probably fail again
    542 	without a clean objdir, at least for src/external/mit/xorg.
    543 
    544 20090616:
    545 	Native Xorg was upgraded.  Builds will need a clean objdir for
    546 	src/external/mit/xorg.  Upgrading a system from sets will not
    547 	work properly yet as the /usr/X11R7/lib/X11/xkb/symbols/pc
    548 	subdirectory has been changed into a file, and this needs to
    549 	be manually "rm -r"'ed before installing xbase.tgz.
    550 
    551 20090501:
    552 	Several new functions were added to string.h/libc, and this
    553 	can cause autoconf problems during the tool build for people
    554 	who fail to clean out their tools objects properly.  If you
    555 	note messages about stpcpy, stpncpy or strnlen accompanying a
    556 	failure during the tool build, clean out all your tools
    557 	objects and start again.
    558 
    559 20090325:
    560 	The i386 port was switched to i486 default toolchain.  This requires
    561 	cleaning your src/tools directory and $TOOLDIR and rebuilding them.
    562 
    563 20090126:
    564 	The __posix_fadvise50 system call changed assembly stub type.  You
    565 	need to 'rm -f __posix_fadvise50.*' in the libc build directory
    566 	to avoid using the old assembly stub.
    567 
    568 20090202:
    569 	pkg_install now depends on the pkgdb cache for automatic conflict
    570 	detection.  It is recommented to rebuild the cache with
    571 	``pkg_admin rebuild''.
    572 
    573 20090110:
    574 	time_t and dev_t have been bumped to 64 bit quantities.  To upgrade:
    575 	1. Make sure your kernel has COMPAT_50 in it.  Build and install.
    576 	   This is needed even in the MODULAR kernel because there is
    577 	   conditionally compiled code in rtsock.c.
    578 	2. make sure build.sh completes and the binaries in a chroot work
    579 	   before installing.
    580 	3. If you don't use build.sh and you build directly to root, and
    581 	   your build breaks in the middle, don't despair.  Make sure headers
    582 	   are installed properly, and start building libraries first libc
    583 	   and libutil, install them and then continue building all the
    584 	   libraries in src/lib and src/gnu/lib and install them.  Once
    585 	   the new libraries are installed, you can restart the build.
    586 	4. If you compile packages and you notice link time warnings,
    587 	   rebuild the required packages to update their shared libraries.
    588 	   Any package you rebuild will require rebuilding all the packages
    589 	   that depend on it.
    590 	5. Next time you run pwd_mkdb with the new binary, the file
    591 	   will be upgraded and it will not be backwards compatible.
    592 	6. The utmpx/wtmpx files (/var/run/utmpx and /var/log/wtmpx, see
    593 	   lastlogx(5)) have been versioned, and there is a heuristic
    594 	   for utmp.  You are better off removing the old files after
    595 	   upgrading.  The automated clearing of /var/run during
    596 	   boot, and the automated rotating of files in /var/log by
    597 	   newsyslog(8), may mean that you do not have to remove the
    598 	   files manually.
    599 	7. The optional accounting file (/var/account/acct, see
    600 	   accton(8)) has not been versioned, and will need to be
    601 	   removed.  The automatic rotation of the accounting file by
    602 	   /etc/daily limits the bad consequences of failure to remove
    603 	   the file.
    604 	8. Application software that writes time_t to binary files on
    605 	   disk will break or need attention.  Most notably: if you are
    606 	   using PostgreSQL < 8.4, you need to dump your databases,
    607 	   rebuild PostgreSQL with the new time_t, then restore.
    608 
    609 20081219:
    610 	config(1) has been updated, and one of the files it creates -
    611 	swapnetbsd.o - has changed format.  You need to rebuild config
    612 	(done automatically by build.sh) and then you need to rerun
    613 	config on all kernel configuration files before rebuilding those
    614 	kernels.
    615 
    616 20081205:
    617 	If you build with MKX11=no, you should remove /etc/rc.d/xdm and
    618 	/etc/rc.d/xfs from DESTDIR because those files were moved to the xetc
    619 	set and will appear as extra files for MKX11=no update builds.
    620 
    621 20081122:
    622 	On i386, various kernel options(4) in GENERIC including
    623 	file systems have been disabled and moved into kernel modules.
    624 	Before trying a new GENERIC kernel, you have to prepare the
    625 	following files as well as a new GENERIC kernel:
    626 
    627 	- build and install kernel modules from src/sys/modules
    628 
    629 	- install the latest bootloader, which will load a module
    630 	  for the file system from which the kernel is loaded automatically
    631 
    632 	If you have to load your kernel from a file system which is not of
    633 	the same type as the root file system, you have to load the necessary
    634 	file system module manually on the boot prompt or in the boot.cfg file.
    635 
    636 20080827:
    637 	If you built and installed a libc from sources between
    638 	2008/08/20 and 2008/08/26 you got a broken strtouq(3)
    639 	which results in false errors reported by lint(1).
    640 	Since this breaks the libc build itself, manual help is
    641 	needed -- lint must be disabled temporarily, e.g.:
    642 	  $ (cd lib/libc && make MKLINT=no dependall install)
    643 
    644 20080813:
    645 	MKDEBUG build was broken because the .depend files did not know
    646 	about .go files.  You need to remove all .depend files and rebuild.
    647 
    648 20080802:
    649 	A regression in binary compatibility for pthread_mutex_t has
    650 	been fixed.  Unfortunately, the price is breaking compatibility
    651 	for -current.
    652 
    653 	Threaded programs (using libpthread) and C++ programs (using
    654 	libstdc++) compiled after 20070907 and before 20080802 need to
    655 	be recompiled.
    656 
    657 	One way to find affected pkgsrc packages:
    658 
    659 	  $ grep REQUIRES=/usr/lib/libpthread /var/db/pkg/*/+BUILD_INFO
    660 	  $ grep REQUIRES=/usr/lib/libstdc++ /var/db/pkg/*/+BUILD_INFO
    661 
    662 20080731:
    663 	WAPBL (metadata journaling support) has been added, but at this
    664 	time isn't backwards compatible with pre-WAPBL aware kernels
    665 	and userland (fsck_ffs in particular).  Please make sure you
    666 	don't use a journaled filesystem with an older kernel/userland,
    667 	especially an uncleanly mounted journaled filesystem.  WAPBL
    668 	also requires the super block to be in the UFS2 format.  You
    669 	can use fsck_ffs -c 4 to update the superblock format.
    670 
    671 20080721:
    672 	Assembler warnings are now fatal if $WARNS>0 and $NOGCCERROR
    673 	isn't defined.
    674 
    675 20080531:
    676 	The ioctl number of DRVSUSPENDDEV command on /dev/drvctl changed
    677 	from 125 (conflicted with DRVCTLCOMMAND) to 129.  The drvctl(8)
    678 	utility needs to be rebuilt and reinstalled as older binaries
    679 	won't work correctly.  The following sequence of commands:
    680 
    681 	  $ (cd sys/sys/ && nbmake-$arch includes)
    682 	  $ (cd sbin/drvctl/ && nbmake-$arch clean)
    683 	  $ (cd sbin/drvctl/ && nbmake-$arch all)
    684 
    685 	leaves new drvctl utility in sbin/drvctl build directory.
    686 
    687 20080503:
    688 	The <bsd.lib.mk> variable MKPRIVATELIB was renamed to LIBISPRIVATE.
    689 
    690 20080521:
    691 	For a while, unprivileged UPDATE builds would fail to
    692 	succeed at the checkflist stage, complaining that
    693 	${DESTDIR}/stand/<arch>/ did not exist.  A fix for this
    694 	problem was committed to share/mk/bsd.kmodule.mk, revision 1.9.
    695 	If you already hit this problem, update the .mk file,
    696 	remove ${DESTDIR}/stand/<arch>, and re-run the build.
    697 
    698 20080303:
    699 	Linker warnings are now fatal if $WARNS>0.
    700 
    701 20080126:
    702 	The posix_fadvise system call has been changed from an assembly
    703 	stub, to a c file that calls an assembly stub.  You need to
    704 	'rm -f posix_fadvise.* .depend' in the libc build directory to
    705 	avoid using the old assembly stub.
    706 
    707 20071209:
    708 	The acpiec(4) driver has been split into two attachments.  If you
    709 	get ACPI errors before the attachment, please update your kernel
    710 	configuration file appropriately or see GENERIC for more details.
    711 
    712 20071115:
    713 	The it(4) driver has been renamed to itesio(4) and the old port
    714 	argument specified in the kernel configuration file is not valid
    715 	anymore.  The itesio(4) driver now uses the Super I/O address port
    716 	rather than the EC address port.  Please update your kernel
    717 	configuration file appropriately or see GENERIC for more details.
    718 
    719 20071028:
    720 	The pccons(4) driver has been removed from the NetBSD/shark port.
    721 	You need to update any custom kernel configuration file you have
    722 	to remove any references to pccons (which includes removing the
    723 	now useless XSERVER option) and replace them with the correct
    724 	entries for the wscons driver.  See the GENERIC configuration file
    725 	for more details.
    726 
    727 20070913:
    728 	A latent bug in dhclient/dhcpd that caused it to be unable to
    729 	enumerate interfaces was fixed.  The bug began to cause
    730 	problems after 20070911 when the kernel's SIOCGIFCONF
    731 	implementation was repaired.  From 20070529 to 20070911 racoon
    732 	could not enumerate interfaces.  (These are noted because
    733 	normal kernel/userspace version matching hygiene is not
    734 	sufficient to avoid this problem.)  Ensure that both kernel
    735 	and userland are from after 20070913.
    736 
    737 20070703:
    738 	nbinstall has been renamed ${MACHINE_GNU_ARCH}-install.  It
    739 	calls the target-specific strip program, and the logic to pass
    740 	down STRIP from make has been removed.  This requires a
    741 	re-installation of tools.
    742 
    743 20070422:
    744 	The way OS emulations lookup filenames inside the emulation root
    745 	has been changed.  Rather than modify the pathname (and copy back
    746 	to userspace) namei() and lookup() directly check the emulation
    747 	root.  One side effect is that absolute symlinks inside the emulated
    748 	root file system will be relative to that file system - unless they
    749 	start /../ this is useful when the emulated root is a real install
    750 	that has such links.
    751 	This might affect symlinks that have been added to reference outside
    752 	the emulated root.
    753 
    754 20070412:
    755 	The pckbc driver on sgimips IP32 has been removed.  Use macekbc
    756 	instead.  See the GENERIC32_IP3x kernel configuration for an
    757 	example.
    758 
    759 20070319:
    760         src/lib/libc/Makefile revision 1.129 broke libc and ld.elf_so
    761         on many platforms due to incorrect flags settings.  If you
    762         updated and built after about 20070315, do "nbmake-$arch
    763 	cleandir" in src/lib/libc and src/libexec/ld.elf_so to force a
    764 	rebuild of object files that might have been built
    765 	incorrectly, and ensure that you have at least
    766 	src/lib/libc/Makefile 1.130.
    767 
    768 20070210:
    769         src/sys/sys/{sa.h,savar.h} were removed.
    770           find ${OBJDIR} \( -name .depend -o -name '*.d' \) -print \
    771               | xargs egrep -l '/sa.h|/savar.h' | xargs rm
    772         will allow dependencies on those files to get get rebuilt
    773 
    774 20070209:
    775         The threading model was changed when the newlock2 branch
    776         was merged to NetBSD-current.  If you boot with a new
    777         kernel (version 4.99.10), then you also need a new pthread
    778         library (/usr/lib/libpthread.so.0.7).  If you boot with
    779         an old kernel, then you need the old pthread library
    780         (/usr/lib/libpthread.so.0.6).  Provided you keep the kernel and
    781         the pthread library in sync, old threaded applications should
    782         continue to work with an old or new kernel.  Note that named(8)
    783 	is the only threaded application in the base system.
    784 
    785 20061214:
    786 	Following the move of string_to_flags() and flags_to_string()
    787 	from the bin/ls/ sources to libutil, users doing UPDATE builds
    788 	will need to do a "make cleandir" in
    789 		tools/mtree/, tools/makefs/, tools/binstall/, tools/pax/,
    790 		bin/pax/, bin/ls/, usr.sbin/mtree/, usr.sbin/makefs/,
    791 		usr.bin/xinstall/, libexec/ftpd/, rescue/, as well
    792 		as the installation images in distrib/
    793 	in order to excise stale references to the old stat_flags.h header
    794 	file in the ls sources -- stat_flags.h has been removed.
    795 
    796 20061108:
    797 	The configure script used in the src/tools/gcc compiler has been
    798 	changed to indicate that our libc has ssp support built-in and
    799 	does not depend on -lssp and -lssp-nonshared.  You'll need to
    800 	make clean in src/tools/gcc first to rebuild the compiler.
    801 
    802 20061009:
    803 	The sysctl variables net.inet{,6}.tcp{,6}.newreno are no longer
    804 	available.  Use net.inet{,6}.tcp{,6}.congctl.selected instead.
    805 
    806 20060814:
    807 	The vt, vidcconsole, kbd, and rpckbd drivers on acorn32 have been
    808 	withdrawn.  Use vidcvideo and pckbd instead.  See the GENERIC
    809 	kernel configuration for an example.  X servers from the last
    810 	few years should cope.
    811 
    812 20060703:
    813 	MPACPI is no more.  We always configure PCI interrupts using ACPI
    814 	if we have an ACPI kernel.  The option MPACPI_SCANPCI has been renamed
    815 	to ACPI_SCANPCI.  Thanks to work from fvdl.
    816 
    817 20060627:
    818 	socket(2) has changed, and its system call has been versioned.
    819 	For userlands with the old version of socket(2), make sure that
    820 	your kernel has 'options COMPAT_30' set, or else 'bad system call'
    821 	errors will result.
    822 
    823 Hints for a more successful build:
    824 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    825     Use build.sh, but do not use its "expert mode":
    826 	This will automatically build the tools in the
    827 	   correct order, and it will keep the tools and the
    828 	   new build products from interfering with the running
    829 	   system.  This will allow you to ignore most of the
    830 	   other advice in this file.
    831     Build a new kernel first:
    832 	This makes sure that any new system calls or features
    833 	   expected by the new userland will be present.  This
    834 	   helps to avoid critical errors when upgrading.
    835     Use object directories:
    836 	This helps to keep stale object
    837 	   files from polluting the build if a Makefile "forgets"
    838 	   about one.  It also makes it easier to clean up after
    839 	   a build.  It's also necessary if you want to use the
    840 	   same source tree for multiple machines.
    841 	   To use object directories with build.sh:
    842 	    a) invoke build.sh with the "-M" or "-O" options.
    843 	   To use object directories without using build.sh:
    844 	    a) cd /usr/src ; make cleandir
    845 	    b) Add "OBJMACHINE=yes" to /etc/mk.conf
    846 	    c) Add "MKOBJDIRS=yes" to /etc/mk.conf
    847 	    d) cd /usr/src ; make build
    848 	   Note that running "make obj" in a directory will create
    849 	   in obj.$MACHINE directory.
    850     Build to a DESTDIR:
    851 	This helps to keep old installed files (especially libraries)
    852 	   from interfering with the new build.
    853 	   To build to a DESTDIR with build.sh, use the "-D" option.
    854 	   To build to a DESTDIR without using build.sh, set the DESTDIR
    855 	   environment variable before running make build.  It should be
    856 	   set to the pathname of an initially empty directory.
    857 	   Problems: if you do not use build.sh, you might need to
    858 		update critical utilities without using DESTDIR since
    859 		nothing is executed from what is installed in DESTDIR.
    860 		(See critical utils, below.)
    861     Build often:
    862 	This keeps critical utilities current enough to not choke
    863 	on any other part of the source tree that depends on up to
    864 	date functionality.  If you use build.sh, you should not have
    865 	this problem.
    866 
    867 What to do if things don't work:
    868 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    869 When things don't work there are usually a few things that commonly
    870 should be done.
    871     1)	make includes
    872 	This should be done automatically by make build.
    873     2)  cd share/mk && make install
    874 	Again, automatically done by make build.
    875 
    876 Failsafe rebuild of a small part of the tree:
    877 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    878 To make sure you rebuild something correctly you want to do
    879 something like the following:
    880     1)  Make sure the includes and .mk files are up to date.
    881     2)  Make sure any program used to build the particular
    882 	utility is up to date.  (yacc, lex, etc...)
    883     3)  cd ...path/to/util...
    884 	make cleandir
    885 	rm ...all obj directories...
    886 	make cleandir			# yes, again
    887 	make obj
    888 	make depend && make
    889 
    890 Failsafe rebuild of the entire tree:
    891 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    892 If you really want to make sure the source tree is clean and
    893 ready for a build try the following.  Note that sourcing /etc/mk.conf
    894 (a make(1) Makefile) in this manner is not right, and will not work
    895 for anyone who uses any make(1) features in /etc/mk.conf.
    896 
    897 ---cut here---
    898 #!/bin/sh
    899 . /etc/mk.conf
    900 
    901 if [ -z $NETBSDSRCDIR ] ; then
    902     NETBSDSRCDIR=/usr/src
    903 fi
    904 if [ \! -d $NETBSDSRCDIR ] ; then
    905     echo Unable to find sources
    906     exit 1
    907 fi
    908 find $NETBSDSRCDIR -name \*.o -o -name obj.\* -o -name obj -exec rm \{\} \;
    909 
    910 if [ -z $BSDOBJDIR ] ; then
    911     BSDOBJDIR=/usr/obj
    912 fi
    913 if [ -d $BSDOBJDIR ] ; then
    914     rm -rf $BSDOBJDIR
    915 fi
    916 
    917 cd $NETBSDSRCDIR && make cleandir
    918 
    919 ---cut here---
    920 
    921 Critical utilities:
    922 ^^^^^^^^^^^^^^^^^^^
    923 	usr.bin/compile_et
    924 	usr.bin/make
    925 	usr.bin/yacc
    926 	usr.bin/lex
    927 	usr.bin/xlint
    928 	usr.bin/config
    929 
    930 Other problems and possible solutions:
    931 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    932 Symptom:Complaints involving a Makefile.
    933 Fix:	Rebuild usr.bin/make:
    934 	cd usr.bin/make && make && make install
    935 	Or, a failsafe method if that doesn't work:
    936 	cd usr.bin/make && cc *.c */*.c -I . -o make && mv make /usr/bin
    937 
    938 Fix:	Make sure .mk files are up to date.
    939 	cd share/mk && make install
    940 
    941 Symptom:Kernel `config' fails to configure any kernel, including GENERIC.
    942 Fix:	Rebuild usr.bin/config
    943 
    944 Symptom:
    945 Fix:	Rebuild usr.bin/yacc
    946 
    947 Symptom:
    948 Fix:	Rebuild usr.bin/lex
    949 
    950 Symptom:
    951 Fix:	rm /usr/lib/libbfd.a
    952 
    953 Symptom:Obsolete intermediate files are used during compilation
    954 Fix:	Try the following sequence of commands in the directory in question.
    955 	make cleandir; rm `make print-objdir`; make cleandir; make obj
    956 	(If you built the tree without "make obj" in the past, obsolete files
    957 	may remain.  The command tries to clean everything up)
    958 
    959 Symptom:.../sysinst/run.c:xx: warning: initialization from incompatible
    960 	pointer type
    961 Fix:	Rebuild and install usr.bin/menuc
    962 
    963 Symptom:mklocale not found during build in share/locale/ctype
    964 Fix:	Build and install usr.bin/mklocale
    965 
    966 Symptom:undefined reference to `__assert13' or `__unsetenv13'
    967 Fix:    Rebuild and install lib/libc
    968 
    969 Symptom:usr.bin/config fails to build.
    970 Fix:	Try building with -DMAKE_BOOTSTRAP added to CFLAGS in Makefile.
    971 
    972 Symptom:undefined reference to `getprogname' or `setprogname'
    973 Fix:    Rebuild and install lib/libc
    974 
    975 Symptom:lint does not understand the '-X' option
    976 Fix:    May need to build & install libs with NOLINT=1 before rebuilding lint
    977 
    978 Symptom:Update build fails in src/tools/gcc complaining that a variable
    979 	(e.g. CPPFLAGS) has changed since the previous run.
    980 Fix:    Run "nbmake-${ARCH} clean" in src/tools/gcc or do a clean build.
    981 
    982 Symptom:cvs [update aborted]: cannot open directory /cvsroot/src/...:
    983 	No such file or directory.
    984 Cause:	If a directory is created by mistake, then it is sometimes
    985 	deleted from the CVS repository using administrative commands
    986 	that bypass the normal cvs access controls.  If your cvs working tree
    987 	contains references to a directory that has been deleted on the
    988 	server in this way, then "cvs update" reports this error.
    989 Fix:	Recursively delete the affected directory from your working tree
    990 	and try the update again.
    991