UPDATING revision 1.379
1$NetBSD: UPDATING,v 1.379 2025/04/27 23:30:39 kre Exp $
2
3This file (UPDATING) is intended to be a brief reference to recent
4changes that might cause problems in the build process, and a guide for
5what to do if something doesn't work.
6
7For a more detailed description of the recommended way to build NetBSD
8using build.sh, see the BUILDING file.
9
10Note that much of the advice in this UPDATING file was written before
11build.sh existed.  Nevertheless, the advice here may be useful for
12working around specific problems with build.sh.
13
14Sections are marked with "^^^^^".  After the section on "Recent changes"
15are several sections containing more general information.
16
17See also: BUILDING, build.sh, Makefile.
18
19Recent changes:
20^^^^^^^^^^^^^^^
21
2220250427:
23	The KERNEL_DIR option to build.sh is now functional.  Set it
24	with ``-V KERNEL_DIR=yes'' on your build.sh command.
25	With this, you can now colocate kernel and associated modules
26	in /netbsd/{kernel,kernel.dbg,modules} instead of having the
27	kernel in / but modules in /stand.
28
29	Note that you'll need new bootstrap code to use this feature.
30
31	This completes work begun many years ago by christos@ :-)
32
3320250413:
34	A change to bsd.lib.mk requires a clean build of all libraries.
35
3620250131:
37	The switch to the new jemalloc requires cleaning in libc.
38
3920241122:
40	Changes to various libraries' build options require cleaning
41	their objdirs in update builds:
42
43	cd external/bsd/file/lib && $TOOLDIR/bin/nbmake-$ARCH clean
44	cd external/bsd/libarchive/lib && $TOOLDIR/bin/nbmake-$ARCH clean
45	cd external/public-domain/xz/lib && $TOOLDIR/bin/nbmake-$ARCH clean
46
47	Also, for architectures with MKCOMPAT, it is necessary to clean
48	the compat objdirs too.  The easiest way is:
49
50	rm -rf OBJDIR/compat/*/*/external/bsd/file/lib
51	rm -rf OBJDIR/compat/*/*/external/bsd/libarchive/lib
52	rm -rf OBJDIR/compat/*/*/external/public-domain/xz/lib
53
54	Changes to bsd.lib.mk to improve detecting differences in
55	shared library symbol exports may cause some .actsym files in
56	the objdir to become stale in update builds.
57
58	To work around this, delete all files matching `*.actsym' in
59	the objdir.  For example:
60
61	find OBJDIR -name '*.actsym' -type f -print0 | xargs -0 rm
62
6320241104:
64	Changes around the integration of the zstd compression
65	library may require manual deletion of some object directories
66	if you update from a build from a few days ago:
67	rm -rf DESTDIR/usr/lib/*/libarchive*
68	rm -rf DESTDIR/usr/lib/*/libmagic*
69	rm -rf DESTDIR/usr/lib/*/libzstd*
70	rm -rf DESTDIR/usr/lib/libarchive*
71	rm -rf DESTDIR/usr/lib/libmagic*
72	rm -rf DESTDIR/usr/lib/libzstd*
73	rm -rf OBJDIR/compat/*/*/external/bsd/file/
74	rm -rf OBJDIR/compat/*/*/external/bsd/libarchive/
75	rm -rf OBJDIR/compat/*/*/external/bsd/zstd/
76	rm -rf OBJDIR/external/bsd/file/
77	rm -rf OBJDIR/external/bsd/libarchive/
78	rm -rf OBJDIR/external/bsd/zstd/
79	rm -rf OBJDIR/external/gpl3/gcc/
80	rm -rf OBJDIR/tools/gcc/
81
8220240926:
83	Building -current when running on amd64 from about 20240924
84	to about 20240926 will not work due to a "malloc_np.h"
85	error. Please downgrade to a version from 20240924 or older,
86	or upgrade to a newer version e.g. using a binary release from
87	the NetBSD build servers.
88
8920240923:
90	Update builds will require cleaning the object directories for
91	jemalloc (like: "rm -rf $OBJ/external/bsd/jemalloc*") and the
92	libc dependency files (like: "rm $OBJ/lib/libc/jemalloc.*").
93	On architectures with COMPAT libs, those also have to be cleaned,
94	e.g. on sparc64: "rm -rf $OBJ/compat/sparc64/sparc/external/bsd/jemalloc*"
95	and "rm $OBJ/compat/sparc64/sparc/lib/libc/jemalloc.*".
96
9720240817:
98	Update builds will require cleaning in src/external/historical/nawk/bin
99	in order to remove the awk binary since now there is a subdirectory
100	called awk.
101
10220240812:
103	Update builds will require removing the tools objdir for gdb
104	if building with MKCROSSGDB=yes. All architectures use gdb.old
105	now.
106
10720240630:
108	Update builds will require removing the tools objdir for binutils
109	(as most architectures should use binutils.old now).
110
11120240610:
112	Update builds are likely to require removing the objdir for
113	distrib/<arch>/cdroms - or at least references to libarchive
114	from within there after the recent libarchive update.
115
11620240504:
117	Update builds on x86 require making the `cleandir' target in
118	lib/libm, or deleting the objdir for lib/libm.
119
12020240423:
121	Update builds with x11 may fail after switching to Mesa 21.
122
12320240410:
124	Update builds may require manually deleting
125	$DESTDIR/var/run/named (and, potentially,
126	$DESTDIR/var/run/lwresd) in order to avoid checkflist failure.
127
12820240409:
129	32-bit compatibility libraries were moved into the base32
130	and debug32 sets.  HTML man pages were moved into the manhtml set.
131
13220230828:
133	If:
134        - you updated to current and ran postinstall between 20230826
135	  and 20230828 inclusive, and
136        - you are not using anything outside the base system to
137	  populate /etc/openssl/certs (e.g., manually adding
138	  certificates or using ca-certificates or mozilla-rootcerts or
139	  mozilla-rootcerts-openssl from pkgsrc),
140	delete /etc/openssl/certs and rerun postinstall or just
141	`certctl rehash'.
142
143	Otherwise, certctl(8) will think someone else has left
144	/etc/openssl/certs in the way and will avoid clobbering it on
145	upgrade from older NetBSD.
146
14720230718:
148	build.sh will use mk.conf in the same directory as build.sh instead
149	of /etc/mk.conf, unless MAKECONF is already defined in the environment.
150
15120230714:
152	Import of gcc 10.5 requires a clean build of at least tools/gcc
153	and external/gpl3/gcc* object directories. An update build
154	without cleaning will result in obscure failures in rare corner
155	cases.
156
15720230604:
158	Building native kernels with the installed make(1) instead of
159	the $TOOLDIR/bin/nbmake-${arch} wrapper will fail if userland
160	has not been updated. Note that this is an unsupported build
161	configuration (but usually works if userland is -current enough).
162
16320230523:
164	ctfmerge was fixed as macOS host tool. This may require a clean tools
165	rebuild to detect the update to tools/compat/configure.
166
16720230515:
168	New openssl build requires removal of the crypto/external/bsd/openssl
169	and tests/crypto/libcrypto subdirectories in the ${OBJDIR} hierarchy.
170	Otherwise test results may be wrong due to wrong "golden" output
171	files being installed.
172
17320230322:
174	Fixes for moved /lib/libisns* mean that builds will complain about
175	./usr/lib/libisns* being missing until src/lib/libisns is forced
176	to (re)install the files, including the symlinks.  The simplest
177	way is to clean this subdir before building.
178
17920230112:
180	New binutils require an updated ld.elf_so. If you are doing
181	(unsupported) in-place self builds (with the -E flag to build.sh),
182	make sure to have installed latest ld.elf_so before you rebuild
183	userland.
184
18520221116:
186	The addition to NetBSD's version of UFS2 of support for extended
187	attributes broke backward compatibility with previous releases
188	of NetBSD, so UFS2 has been restored to being compatible with
189	previous NetBSD releases by disabling extended attributes.
190	(Note that ACLs are implemented as extended attributes, so
191	this changes disables ACLs as well.)
192
193	Support for UFS2 with extended attributes is now available in a new
194	UFS variant called UFS2ea.  If you have created extended attributes
195	in an original UFS2 file system then "fsck -p" will now fail due to
196	the unexpected presence of extended attributes and "fsck -y" will
197	remove all extended attributes.  If you wish to preserve extended
198	attributes rather than delete them, there is a utility to convert
199	a UFS2 file system to UFS2ea and leave extended attributes in place,
200	but this should be used with caution since it will preserve any
201	extended attributes that have been corrupted by the backward
202	incompatibility too.
203
204	If you wish to use a UFS2ea file system as your root file system,
205	then you will need to update your boot loader to a version that
206	supports UFS2ea.
207
208	For more information, see:
209	https://wiki.netbsd.org/features/UFS2ea
210
21120221111:
212	The new libdrm import worsened the conflict issues for the
213	kdump/ktruss ioctl, and i915 now conflicts with base, and has
214	been turned off.  This will cause update build issues like:
215
216		kdump-ioctl.c:12175:143: error: 'DRM_IOCTL_I915_DESTROY_HEAP'
217		   undeclared here (not in a function);
218		   did you mean 'DRM_IOCTL_MODE_DESTROY_DUMB'?
219
220	You'll need to clean usr.bin/ktruss, usr.bin/kdump, and rescue.
221
22220220921:
223	Since the kernel version was bumped to 9.99.100, the bootloader
224	must be updated on x86 or EFI boot platforms in order to load
225	modules from boot.cfg(5) or interactively at the bootloader
226	prompt.
227
228	The kernel can still load modules at runtime, with modload(8)
229	or modules.conf(5), with no bootloader update.  This will not
230	affect release branches because it only applies to patch
231	numbers >=100.
232
233	On x86 (i386 or amd64) with BIOS boot, this requires copying a
234	new /usr/mdec/boot to /boot.  You can build this in the destdir
235	by running `$TOOLDIR/bin/nbmake-$ARCH dependall install' in
236	sys/arch/i386/stand.
237
238	On platforms with EFI boot (including x86 with EFI boot), this
239	requires copying a new /usr/mdec/boot*.efi to the EFI/BOOT/
240	directory on the EFI system partition.  The boot*.efi file is:
241
242	aarch64	bootaa64.efi
243	amd64	bootx64.efi
244	arm	bootarm.efi	(32-bit arm)
245	i386	bootx32.efi
246
247	You can build this in the destdir by running
248	`$TOOLDIR/bin/nbmake-$ARCH dependall install' in
249	sys/stand/efiboot/boot*.
250
25120220821:
252	Support for building extsrc/ has been deprecated.
253	EXTSRCSRCDIR and MKEXTSRC have been deprecated.
254
25520220714:
256	Updates to xorg-server and associated drivers may cause builds to
257	fail.  Cleaning both DESTDIR and the xorg build tree may be needed.
258
25920220628:
260	Changes in the build of src/games/robots require a clean build
261	of that program.
262
26320211116:
264	Changes in the xorg build require clean obj dirs for external/mit/xorg
265	(or a full clean/non-update build).
266
26720211112:
268	Device tree sources were updated for evbarm.  Some device nodes
269	(in particular, ld(4) devices on the ROCKPro64) will be renumbered.
270
27120211014:
272	MKPIE default for aarch64 has changed, a clean build is required.
273
27420210917:
275	Changed MNT_ACLS to default to POSIX1e ACLs instead of NFSv4
276	ACLs, to be compatible with FreeBSD. If you are using NFSv4 ACLs
277	and have "acls" in /etc/fstab you'll need to change it to "nfs4acls".
278
27920210711:
280	Updated GMP sources may require cleaning in tools/gmp and/or in
281	external/lgpl3/gmp/lib, particularly if GCC itself does not build.
282
28320210417:
284	GCC 10 was enabled for several platforms.  If builds fail in either
285	tools/gcc or external/gpl3/gcc, first try cleaning those objects and
286	removing the $DESTDIR/usr/include/g++ subdirectory.
287
28820201016:
289	MIPS kernel modules have been disabled until they work.  This will
290	turn up in extra files in the DESTDIR, which should be cleaned.
291
29220200925:
293	GNU MPC and MPFR have been updated.  At least MPFR needs cleaning
294	in both the tools and external dirs.
295
29620200912:
297	GCC 9 has arrived for Arm and x86 platforms, and will be coming
298	for several more, as will binutils 2.34.  Clean as required.
299
30020200907:
301	GCC 9 is coming, and binutils has been updated for MIPS.  This
302	probably requires cleaning the tools/binutils.
303
30420200811:
305	GCC updates may require cleaning the objdir.  This may occur
306	due to GCC 7.5 update, GCC 8.4 move to gcc.old, or the upcoming
307	GCC 9 upgrade.
308
30920200614:
310	blacklist* has been renamed to blocklist*. postinstall(8)
311	should handle the migration.
312
31320200601:
314	Due to a mistake in LIBISPRIVATE handling, .so libraries were
315	created in the build directories and need cleaning.
316
31720200311:
318	GCC 8 ports will need cleaning in src/tools/gcc and
319	src/external/gpl3/gcc due to GCC 8.4 update.
320
32120191118:
322	More architectures were switched to gcc8:
323	    i386, ia64 powerpc64, sparc, sparc64, arm
324	The same comments as in 20191022 apply.
325
32620191112:
327	The LLVM update requires a clean rebuild for all architectures using
328	LLVM during the tools build phase (i386, amd64, aarch64).
329
33020191022:
331	Ports amd64 and aarch64 switched to GCC 8.3 by default.
332	In-place ("expert mode", build.sh -E) builds are not supported
333	when going from a GCC 7 userland to GCC 8. Do a regular
334	build to a different DESTDIR (or preferably: build.sh -U) at least
335	once and install sets, or download comp.{tar.xz,tgz} from the
336	daily builds and install that before doing the next in-place build.
337
33820191001:
339	GCC 8.3 was imported.  Builds of src/tools/gcc may fail if
340	old builds with GCC 7 output now uses GCC 8.  Clean this
341	directory, and also clean src/external/gpl3/gcc.
342
34320190903:
344	Files with names that coincide with existing files' names on
345	case-insensitive file systems were inadvertently committed, for
346	radeon GPU firmware.  We cannot mark these as obsolete for
347	postinstall to fix, so if you updated src since 2019-08-26, and
348	ran build.sh distribution or ran build.sh release, you must
349	manually delete the following files in your DESTDIR (which is
350	usually $OBJDIR/destir.$ARCH), or from / if you have installed
351	them:
352
353		/libdata/firmware/radeon/bonaire_ce.bin
354		/libdata/firmware/radeon/bonaire_mc.bin
355		/libdata/firmware/radeon/bonaire_me.bin
356		/libdata/firmware/radeon/bonaire_mec.bin
357		/libdata/firmware/radeon/bonaire_pfp.bin
358		/libdata/firmware/radeon/bonaire_rlc.bin
359		/libdata/firmware/radeon/bonaire_sdma.bin
360		/libdata/firmware/radeon/bonaire_smc.bin
361		/libdata/firmware/radeon/bonaire_uvd.bin
362		/libdata/firmware/radeon/hainan_ce.bin
363		/libdata/firmware/radeon/hainan_mc.bin
364		/libdata/firmware/radeon/hainan_me.bin
365		/libdata/firmware/radeon/hainan_pfp.bin
366		/libdata/firmware/radeon/hainan_rlc.bin
367		/libdata/firmware/radeon/hainan_smc.bin
368		/libdata/firmware/radeon/hawaii_ce.bin
369		/libdata/firmware/radeon/hawaii_mc.bin
370		/libdata/firmware/radeon/hawaii_me.bin
371		/libdata/firmware/radeon/hawaii_mec.bin
372		/libdata/firmware/radeon/hawaii_pfp.bin
373		/libdata/firmware/radeon/hawaii_rlc.bin
374		/libdata/firmware/radeon/hawaii_sdma.bin
375		/libdata/firmware/radeon/hawaii_smc.bin
376		/libdata/firmware/radeon/kabini_ce.bin
377		/libdata/firmware/radeon/kabini_me.bin
378		/libdata/firmware/radeon/kabini_mec.bin
379		/libdata/firmware/radeon/kabini_pfp.bin
380		/libdata/firmware/radeon/kabini_rlc.bin
381		/libdata/firmware/radeon/kabini_sdma.bin
382		/libdata/firmware/radeon/kaveri_ce.bin
383		/libdata/firmware/radeon/kaveri_me.bin
384		/libdata/firmware/radeon/kaveri_mec.bin
385		/libdata/firmware/radeon/kaveri_mec2.bin
386		/libdata/firmware/radeon/kaveri_pfp.bin
387		/libdata/firmware/radeon/kaveri_rlc.bin
388		/libdata/firmware/radeon/kaveri_sdma.bin
389		/libdata/firmware/radeon/mullins_ce.bin
390		/libdata/firmware/radeon/mullins_me.bin
391		/libdata/firmware/radeon/mullins_mec.bin
392		/libdata/firmware/radeon/mullins_pfp.bin
393		/libdata/firmware/radeon/mullins_rlc.bin
394		/libdata/firmware/radeon/mullins_sdma.bin
395		/libdata/firmware/radeon/oland_ce.bin
396		/libdata/firmware/radeon/oland_mc.bin
397		/libdata/firmware/radeon/oland_me.bin
398		/libdata/firmware/radeon/oland_pfp.bin
399		/libdata/firmware/radeon/oland_rlc.bin
400		/libdata/firmware/radeon/oland_smc.bin
401		/libdata/firmware/radeon/pitcairn_ce.bin
402		/libdata/firmware/radeon/pitcairn_mc.bin
403		/libdata/firmware/radeon/pitcairn_me.bin
404		/libdata/firmware/radeon/pitcairn_pfp.bin
405		/libdata/firmware/radeon/pitcairn_rlc.bin
406		/libdata/firmware/radeon/pitcairn_smc.bin
407		/libdata/firmware/radeon/tahiti_ce.bin
408		/libdata/firmware/radeon/tahiti_mc.bin
409		/libdata/firmware/radeon/tahiti_me.bin
410		/libdata/firmware/radeon/tahiti_pfp.bin
411		/libdata/firmware/radeon/tahiti_rlc.bin
412		/libdata/firmware/radeon/tahiti_smc.bin
413		/libdata/firmware/radeon/verde_ce.bin
414		/libdata/firmware/radeon/verde_mc.bin
415		/libdata/firmware/radeon/verde_me.bin
416		/libdata/firmware/radeon/verde_pfp.bin
417		/libdata/firmware/radeon/verde_rlc.bin
418		/libdata/firmware/radeon/verde_smc.bin
419
420	We will re-import these radeon firmware images another way
421	later.
422
42320190727:
424	The uefi bootloader has gained tftp support and needs a clean
425	build. If you do update builds, manually clean its object
426	directory by something like:
427	cd sys/arch/i386/stand/efiboot && make clean
428
42920190723:
430	The jemalloc allocator in libc is now built without extended
431	debugging (for performance reasons). In update builds make sure
432	to rebuild it completely, by removing all affected object files,
433	including compat builds, something like:
434	cd /usr/obj && find . -type d -name jemalloc|xargs rm -rf
435
43620190207:
437	GCC 7 switched for many ports.  Update builds are likely to fail.
438
439Hints for a more successful build:
440^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
441    Use build.sh, but do not use its "expert mode":
442	This will automatically build the tools in the
443	   correct order, and it will keep the tools and the
444	   new build products from interfering with the running
445	   system.  This will allow you to ignore most of the
446	   other advice in this file.
447    Build a new kernel first:
448	This makes sure that any new system calls or features
449	   expected by the new userland will be present.  This
450	   helps to avoid critical errors when upgrading.
451    Use object directories:
452	This helps to keep stale object
453	   files from polluting the build if a Makefile "forgets"
454	   about one.  It also makes it easier to clean up after
455	   a build.  It's also necessary if you want to use the
456	   same source tree for multiple machines.
457	   To use object directories with build.sh:
458	    a) invoke build.sh with the "-M" or "-O" options.
459	   To use object directories without using build.sh:
460	    a) cd /usr/src ; make cleandir
461	    b) Add "OBJMACHINE=yes" to /etc/mk.conf
462	    c) Add "MKOBJDIRS=yes" to /etc/mk.conf
463	    d) cd /usr/src ; make build
464	   Note that running "make obj" in a directory will create
465	   in obj.$MACHINE directory.
466    Build to a DESTDIR:
467	This helps to keep old installed files (especially libraries)
468	   from interfering with the new build.
469	   To build to a DESTDIR with build.sh, use the "-D" option.
470	   To build to a DESTDIR without using build.sh, set the DESTDIR
471	   environment variable before running make build.  It should be
472	   set to the pathname of an initially empty directory.
473	   Problems: if you do not use build.sh, you might need to
474		update critical utilities without using DESTDIR since
475		nothing is executed from what is installed in DESTDIR.
476		(See critical utils, below.)
477    Build often:
478	This keeps critical utilities current enough to not choke
479	on any other part of the source tree that depends on up to
480	date functionality.  If you use build.sh, you should not have
481	this problem.
482
483What to do if things don't work:
484^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
485When things don't work there are usually a few things that commonly
486should be done.
487    1)	make includes
488	This should be done automatically by make build.
489    2)  cd share/mk && make install
490	Again, automatically done by make build.
491
492Failsafe rebuild of a small part of the tree:
493^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
494To make sure you rebuild something correctly you want to do
495something like the following:
496    1)  Make sure the includes and .mk files are up to date.
497    2)  Make sure any program used to build the particular
498	utility is up to date.  (yacc, lex, etc...)
499    3)  cd ...path/to/util...
500	make cleandir
501	rm ...all obj directories...
502	make cleandir			# yes, again
503	make obj
504	make depend && make
505
506Failsafe rebuild of the entire tree:
507^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
508If you really want to make sure the source tree is clean and
509ready for a build try the following.  Note that sourcing /etc/mk.conf
510(a make(1) Makefile) in this manner is not right, and will not work
511for anyone who uses any make(1) features in /etc/mk.conf.
512
513---cut here---
514#!/bin/sh
515. /etc/mk.conf
516
517if [ -z $NETBSDSRCDIR ] ; then
518    NETBSDSRCDIR=/usr/src
519fi
520if [ \! -d $NETBSDSRCDIR ] ; then
521    echo Unable to find sources
522    exit 1
523fi
524find $NETBSDSRCDIR -name \*.o -o -name obj.\* -o -name obj -exec rm \{\} \;
525
526if [ -z $BSDOBJDIR ] ; then
527    BSDOBJDIR=/usr/obj
528fi
529if [ -d $BSDOBJDIR ] ; then
530    rm -rf $BSDOBJDIR
531fi
532
533cd $NETBSDSRCDIR && make cleandir
534
535---cut here---
536
537Critical utilities:
538^^^^^^^^^^^^^^^^^^^
539	usr.bin/make
540	usr.bin/yacc
541	usr.bin/lex
542	usr.bin/xlint
543	usr.bin/config
544
545Other problems and possible solutions:
546^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
547Symptom:Complaints involving a Makefile.
548Fix:	Rebuild usr.bin/make:
549	cd usr.bin/make && make && make install
550	Or, a failsafe method if that doesn't work:
551	cd usr.bin/make && cc -DMAKE_NATIVE *.c -I. -o make \
552	&& install make /usr/bin
553
554Fix:	Make sure .mk files are up to date.
555	cd share/mk && make install
556
557Symptom:Kernel `config' fails to configure any kernel, including GENERIC.
558Fix:	Rebuild usr.bin/config
559
560Symptom:Obsolete intermediate files are used during compilation
561Fix:	Try the following sequence of commands in the directory in question.
562	make cleandir; rm `make print-objdir`; make cleandir; make obj
563	(If you built the tree without "make obj" in the past, obsolete files
564	may remain.  The command tries to clean everything up)
565
566Symptom:.../sysinst/run.c:xx: warning: initialization from incompatible
567	pointer type
568Fix:	Rebuild and install usr.bin/menuc
569
570Symptom:mklocale not found during build in share/locale/ctype
571Fix:	Build and install usr.bin/mklocale
572
573Symptom:undefined reference to `__assert13' or `__unsetenv13'
574Fix:    Rebuild and install lib/libc
575
576Symptom:usr.bin/config fails to build.
577Fix:	Try building with -DMAKE_BOOTSTRAP added to CFLAGS in Makefile.
578
579Symptom:undefined reference to `getprogname' or `setprogname'
580Fix:    Rebuild and install lib/libc
581
582Symptom:Update build fails in src/tools/gcc complaining that a variable
583	(e.g. CPPFLAGS) has changed since the previous run.
584Fix:    Run "nbmake-${ARCH} clean" in src/tools/gcc or do a clean build.
585
586Symptom:cvs [update aborted]: cannot open directory /cvsroot/src/...:
587	No such file or directory.
588Cause:	If a directory is created by mistake, then it is sometimes
589	deleted from the CVS repository using administrative commands
590	that bypass the normal cvs access controls.  If your cvs working tree
591	contains references to a directory that has been deleted on the
592	server in this way, then "cvs update" reports this error.
593Fix:	Recursively delete the affected directory from your working tree
594	and try the update again.
595