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$NetBSD: UPDATING,v 1.178.2.1.2.1 2009/05/30 16:30:24 snj Exp $

This file (UPDATING) is intended to be a brief reference to recent
changes that might cause problems in the build process, and a guide for
what to do if something doesn't work.

For a more detailed description of the recommended way to build NetBSD
using build.sh, see the BUILDING file.

Note that much of the advice in this UPDATING file was written before
build.sh existed. Nevertheless, the advice here may be useful for
working around specific problems with build.sh.

See also: BUILDING, build.sh, Makefile.

Recent changes:
^^^^^^^^^^^^^^^

20090530:
pkg_install now depends on the pkgdb cache for automatic conflict
detection. It is recommented to rebuild the cache with
``pkg_admin rebuild''.

audit-packages.conf(5) has been superseded by pkg_install.conf(5).
The default configuration is the same. Support for pkg_view(1) has
been retired. The functionality of audit-packages(1) and
download-vulnerability-list(1) has moved into pkg_admin(1), wrapper
scripts that handle the common use cases are provided.

20081205:
If you build with MKX11=no, you should remove /etc/rc.d/xdm and
/etc/rc.d/xfs from DESTDIR because those files were moved to the xetc
set and will appear as extra files for MKX11=no update builds.

20080827:
If you built and installed a libc from sources between
2008/08/20 and 2008/08/26 you got a broken strtouq(3)
which results in false errors reported by lint(1).
Since this breaks the libc build itself, manual help is
needed -- lint must be disabled temporarily, e.g:
$ (cd lib/libc && make MKLINT=no dependall install)

20080813:
MKDEBUG build was broken because the .depend files did not know
about .go files. You need to remove all .depend files and rebuild.

20080731:
WAPBL (metadata journaling support) has been added, but at this
time isn't backwards compatible with pre-WAPBL aware kernels
and userland (fsck_ffs in particular). Please make sure you
don't use a journaled filesystem with an older kernel/userland,
especially an uncleanly mounted journaled filesystem. WAPBL
also requires the super block to be in the UFS2 format. You
can use fsck_ffs -c 4 to update the superblock format.

20080721:
Assembler warnings are now fatal if $WARNS>0 and $NOGCCERROR
isn't defined.

20080531:
The ioctl number of DRVSUSPENDDEV command on /dev/drvctl changed
from 125 (conflicted with DRVCTLCOMMAND) to 129. The drvctl(8)
utility needs to be rebuilt and reinstalled as older binaries
won't work correctly. The following sequence of commands:

$ (cd sys/sys/ && nbmake-$arch includes)
$ (cd sbin/drvctl/ && nbmake-$arch clean)
$ (cd sbin/drvctl/ && nbmake-$arch all)

leaves new drvctl utility in sbin/drvctl build directory.

20080503:
The <bsd.lib.mk> variable MKPRIVATELIB was renamed to LIBISPRIVATE.

20080521:
For a while, unprivileged UPDATE builds would fail to
succeed at the checkflist stage, complaining that
${DESTDIR}/stand/<arch>/ did not exist. A fix for this
problem was committed to share/mk/bsd.kmodule.mk, revision 1.9.
If you already hit this problem, update the .mk file,
remove ${DESTDIR}/stand/<arch>, and re-run the build.

20080303:
Linker warnings are now fatal if $WARNS>0.

20080126:
The posix_fadvise system call has been changed from an assembly
stub, to a c file that calls an assembly stub. You need to
'rm -f posix_fadvise.* .depend' in the libc build directory to
avoid using the old assembly stub.

20071209:
The acpiec(4) driver has been split into two attachments. If you
get ACPI errors before the attachment, please update your kernel
configuration file appropriately or see GENERIC for more details.

20071115:
The it(4) driver has been renamed to itesio(4) and the old port
argument specified in the kernel configuration file is not valid
anymore. The itesio(4) driver now uses the Super I/O address port
rather than the EC address port. Please update your kernel
configuration file appropriately or see GENERIC for more details.

20071028:
The pccons(4) driver has been removed from the NetBSD/shark port.
You need to update any custom kernel configuration file you have
to remove any references to pccons (which includes removing the
now useless XSERVER option) and replace them with the correct
entries for the wscons driver. See the GENERIC configuration file
for more details.

20070913:
A latent bug in dhclient/dhcpd that caused it to be unable to
enumerate interfaces was fixed. The bug began to cause
problems after 20070911 when the kernel's SIOCGIFCONF
implementation was repaired. From 20070529 to 20070911 racoon
could not enumerate interfaces. (These are noted because
normal kernel/userspace version matching hygiene is not
sufficient to avoid this problem.) Ensure that both kernel
and userland are from after 20070913.

20070703:
nbinstall has been renamed as it calls the target specific and
the logic to pass down STRIP from mk been removed. This forces
a re-installation of tools.

20070422:
The way OS emulations lookup filenames inside the emulation root
has been changed. Rather than modify the pathname (and copy back
to userspace) namei() and lookup() directly check the emulation
root. One side effect is that absolute symlinks inside the emulated
root file system will be relative to that file system - unless they
start /../ this is useful when the emulated root is a real install
that has such links.
This might affect symlinks that have been added to reference outside
the emulated root.

20070412:
The pckbc driver on sgimips IP32 has been removed. Use macekbc
instead. See the GENERIC32_IP3x kernel configuration for an
example.

20070319:
        src/lib/libc/Makefile revision 1.129 broke libc and ld.elf_so
        on many platforms due to incorrect flags settings. If you
        updated and built after about 20070315, do "nbmake-$arch
cleandir" in src/lib/libc and src/libexec/ld.elf_so to force a
rebuild of object files that might have been built
incorrectly, and ensure that you have at least
src/lib/libc/Makefile 1.130.

20070210:
        src/sys/sys/{sa.h,savar.h} were removed.
          find ${OBJDIR} \( -name .depend -o -name '*.d' \) -print \
              | xargs egrep -l '/sa.h|/savar.h' | xargs rm
        will allow dependencies on those files to get get rebuilt

20070209:
        The threading model was changed when the newlock2 branch
        was merged to NetBSD-current. If you boot with a new
        kernel (version 4.99.10), then you also need a new pthread
        library (/usr/lib/libpthread.so.0.7). If you boot with
        an old kernel, then you need the old pthread library
        (/usr/lib/libpthread.so.0.6). Provided you keep the kernel and
        the pthread library in sync, old threaded applications should
        continue to work with an old or new kernel. Note that named(8)
is the only threaded application in the base system.

20061214:
Following the move of string_to_flags() and flags_to_string()
from the bin/ls/ sources to libutil, users doing UPDATE builds
will need to do a "make cleandir" in
tools/mtree/, tools/makefs/, tools/binstall/, tools/pax/,
bin/pax/, bin/ls/, usr.sbin/mtree/, usr.sbin/makefs/,
usr.bin/xinstall/, libexec/ftpd/, rescue/, as well
as the installation images in distrib/
in order to excise stale references to the old stat_flags.h header
file in the ls sources -- stat_flags.h has been removed.

20061108:
The configure script used in the src/tools/gcc compiler has been
changed to indicate that our libc has ssp support built-in and
does not depend on -lssp and -lssp-nonshared. You'll need to
make clean in src/tools/gcc first to rebuild the compiler.

20061009:
The sysctl variables net.inet{,6}.tcp{,6}.newreno are no longer
available. Use net.inet{,6}.tcp{,6}.congctl.selected instead.

20060814:
The vt, vidcconsole, kbd, and rpckbd drivers on acorn32 have been
withdrawn. Use vidcvideo and pckbd instead. See the GENERIC
kernel configuration for an example. X servers from the last
few years should cope.

20060703:
MPACPI is no more. We always configure PCI interrupts using ACPI
if we have an ACPI kernel. The option MPACPI_SCANPCI has been renamed
to ACPI_SCANPCI. Thanks to work from fvdl.

20060627:
socket(2) has changed, and its system call has been versioned.
For userlands with the old version of socket(2), make sure that
your kernel has 'options COMPAT_30' set, or else 'bad system call'
errors will result.

Hints for a more successful build:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    Use build.sh, but do not use its "expert mode":
This will automatically build the tools in the
correct order, and it will keep the tools and the
new build products from interfering with the running
system. This will allow you to ignore most of the
other advice in this file.
    Build a new kernel first:
This makes sure that any new system calls or features
expected by the new userland will be present. This
helps to avoid critical errors when upgrading.
    Use object directories:
This helps to keep stale object
files from polluting the build if a Makefile "forgets"
about one. It also makes it easier to clean up after
a build. It's also necessary if you want to use the
same source tree for multiple machines.
To use object directories with build.sh:
a) invoke build.sh with the "-M" or "-O" options.
To use object directories without using build.sh:
a) cd /usr/src ; make cleandir
b) Add "OBJMACHINE=yes" to /etc/mk.conf
c) Add "MKOBJDIRS=yes" to /etc/mk.conf
d) cd /usr/src ; make build
Note that running "make obj" in a directory will create
in obj.$MACHINE directory.
    Build to a DESTDIR:
This helps to keep old installed files (especially libraries)
from interfering with the new build.
To build to a DESTDIR with build.sh, use the "-D" option.
To build to a DESTDIR without using build.sh, set the DESTDIR
environment variable before running make build. It should be
set to the pathname of an initially empty directory.
Problems: if you do not use build.sh, you might need to
update critical utilities without using DESTDIR since
nothing is executed from what is installed in DESTDIR.
(See critical utils, below.)
    Build often:
This keeps critical utilities current enough to not choke
on any other part of the source tree that depends on up to
date functionality. If you use build.sh, you should not have
this problem.
 
What to do if things don't work:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
When things don't work there is usually a few things that commonly
should be done.
    1) make includes
This should be done automatically by make build.
    2) cd share/mk && make install
Again, automatically done by make build.

Failsafe rebuild of a small part of the tree:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
To make sure you rebuild something correctly you want to do
something like the following:
    1) Make sure the includes and .mk files are up to date.
    2) Make sure any program used to build the particular
utility is up to date. (yacc, lex, etc...)
    3) cd ...path/to/util...
make cleandir
rm ...all obj directories...
make cleandir # yes, again
make obj
make depend && make

Failsafe rebuild of the entire tree:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you really want to make sure the source tree is clean and
ready for a build try the following. Note that sourcing /etc/mk.conf
(a make(1) Makefile) in this manner is not right, and will not work
for anyone who uses any make(1) features in /etc/mk.conf.

---cut here---
#!/bin/sh
. /etc/mk.conf

if [ -z $NETBSDSRCDIR ] ; then
    NETBSDSRCDIR=/usr/src
fi
if [ \! -d $NETBSDSRCDIR ] ; then
    echo Unable to find sources
    exit 1
fi
find $NETBSDSRCDIR -name \*.o -o -name obj.\* -o -name obj -exec rm \{\} \;

if [ -z $BSDOBJDIR ] ; then
    BSDOBJDIR=/usr/obj
fi
if [ -d $BSDOBJDIR ] ; then
    rm -rf $BSDOBJDIR
fi

cd $NETBSDSRCDIR && make cleandir

---cut here---

Critical utilities:
^^^^^^^^^^^^^^^^^^^
usr.bin/compile_et
usr.bin/make
usr.bin/yacc
usr.bin/lex
usr.bin/xlint
usr.bin/config

Other problems and possible solutions:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Symptom:Complaints involving a Makefile.
Fix: Rebuild usr.bin/make:
cd usr.bin/make && make && make install
Or, a failsafe method if that doesn't work:
cd usr.bin/make && cc *.c */*.c -I . -o make && mv make /usr/bin

Fix: Make sure .mk files are up to date.
cd share/mk && make install

Symptom:Kernel `config' fails to configure any kernel, including GENERIC.
Fix: Rebuild usr.bin/config

Symptom:
Fix: Rebuild usr.bin/yacc

Symptom:
Fix: Rebuild usr.bin/lex

Symptom:
Fix: rm /usr/lib/libbfd.a

Symptom:Obsolete intermediate files are used during compilation
Fix: Try the following sequence of commands in the directory in question.
make cleandir; rm `make print-objdir`; make cleandir; make obj
(If you built the tree without "make obj" in the past, obsolete files
may remain. The command tries to clean everything up)

Symptom:.../sysinst/run.c:xx: warning: initialization from incompatible pointer type
Fix: Rebuild and install usr.bin/menuc

Symptom:mklocale not found during build in share/locale/ctype
Fix: Build and install usr.bin/mklocale

Symptom:undefined reference to `__assert13' or `__unsetenv13'
Fix: Rebuild and install lib/libc

Symptom:usr.bin/config fails to build.
Fix: Try building with -DMAKE_BOOTSTRAP added to CFLAGS in Makefile.

Symptom:undefined reference to `getprogname' or `setprogname'
Fix: Rebuild and install lib/libc

Symptom:lint does not understand the '-X' option
Fix: May need to build & install libs with NOLINT=1 before rebuilding lint
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