Date: Tue, 21 Feb 2023 20:51:59 -0800 From: Mark Millard <marklmi@yahoo.com> To: Peter <pmc@citylink.dinoex.sub.org> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: 13.2 BETA2: how do debug META_MODE? Message-ID: <A6A8EA3C-7D14-4467-B00E-388685C4A7F4@yahoo.com> In-Reply-To: <Y/WH9icO%2BgWPBybo@disp.intra.daemon.contact> References: <41B536B0-DA66-449E-96BB-E11A8750471A.ref@yahoo.com> <41B536B0-DA66-449E-96BB-E11A8750471A@yahoo.com> <Y/S/RfZaWXXYPx2w@disp.intra.daemon.contact> <ED41CCB8-7A32-4924-A756-099D8E819C4D@yahoo.com> <Y/V5ozYzwL67qDOP@disp.intra.daemon.contact> <F9AE0FD8-5E94-484A-A67A-8D4FAB967F59@yahoo.com> <Y/WH9icO%2BgWPBybo@disp.intra.daemon.contact>
next in thread | previous in thread | raw e-mail | index | archive | help
On Feb 21, 2023, at 19:11, Peter <pmc@citylink.dinoex.sub.org> wrote:
> On Tue, Feb 21, 2023 at 06:44:09PM -0800, Mark Millard wrote:
> ! On Feb 21, 2023, at 18:10, Peter <pmc@citylink.dinoex.sub.org> =
wrote:
> !=20
> ! > On Tue, Feb 21, 2023 at 11:56:13AM -0800, Mark Millard wrote:
> ! > ! On Feb 21, 2023, at 04:55, Peter <pmc@citylink.dinoex.sub.org> =
wrote:
> ! > !=20
> ! > ! > ! # cd /usr/src/
> ! > ! > ! # env WITH_META_MODE=3Dyes make buildworld
> ! > ! > ! # env WITH_META_MODE=3Dyes make installworld
> ! > ! > ! # env WITH_META_MODE=3Dyes make buildworld (again #0)
> ! > ! > ! ## no more rebuilds below?
> ! > ! > ! # env WITH_META_MODE=3Dyes make buildworld (again #1)
> ! > ! > ! # env WITH_META_MODE=3Dyes make buildworld (again #2)
> ! > ! >=20
> ! > ! > But what is the difference between #0 and #1?
> ! > !=20
> ! > ! awk, cp, ln, rm, sed, and many more from
> ! > ! . . ./tmp/legacy/usr/sbin/have new dates
> ! > ! for rebuilds after installworld (that targets
> ! > ! the running system). Not true for #1 and #2.
> ! > !=20
> ! > ! The dates on these tools being more recent than
> ! > ! the files that they were involved in producing
> ! > ! leads to rebuilding those files. That in turn
> ! > ! leads to other files being rebuilt.
> ! > !=20
> ! > ! make with -dM reports the likes of:
> ! > !=20
> ! > ! file '. . ./tmp/legacy/usr/sbin/awk' is newer than the =
target...
> ! > !=20
> ! > ! explicitly as it goes. As I remember tmp/legacy/usr/sbin/
> ! > ! was always part of the path for what I found.
> ! >=20
> ! > Mark, thanks a lot for the proper input at the right time!
> ! >=20
> ! > This put me on the right track and I mananged to analyze and
> ! > understand what is actually happening.
> ! >=20
> ! > It looks like my issue does resolve itself somehow, and things
> ! > start to behave as expected again after four builds.
> !=20
> ! Intersting.
> !=20
> ! > ! I did not do the analysis of how (e.g.) tmp/legacy/usr/sbin/awk
> ! > ! ended up being newer than such a target and, so, causing a
> ! > ! rebuild of that target. I was going the direction: that
> ! > ! it is newer really is unlikely to justify the rebuild for
> ! > ! the target(s) in question. The other direction about how
> ! > ! it got to be newer is also relevant.
> ! >=20
> ! > I have now analyzed some parts of it. META_MODE typically finds =
some
> ! > build-tools to rebuild, but then if the result is not different
> ! > from what was there before, then "install" will not copy it to the
> ! > bin-dir, and so the avalanche gets usually avoided.
> ! >=20
> !=20
> ! The implication is that "install -C" is in use, quoting the
> ! man page:
> !=20
> ! -C Copy the file. If the target file already exists and =
the files
> ! are the same, then do not change the modification time =
of the
> ! target. If the target's file flags and mode need not =
to be
> ! changed, the target's inode change time is also =
unchanged.
> !=20
> ! -c Copy the file. This is actually the default. The -c =
option is
> ! only included for backwards compatibility.
> !=20
> ! -C might have more of an effect in a reproducible-build
> ! style build process than on a non-reproducible-build
> ! style one.
>=20
> Yepp. "install -p" is used, see /usr/src/tools/install.sh
>=20
The code for the _bootstap_tools_links uses "cp -pf",
not install, to establish part of . . ./tmp/legacy/bin/ .
(Note: . . ./tmp/legacy/sbin -> ../bin so is a via a
symbolic link.) Before the "cp -pf" there is a "rm -f"
deleting the target file before the copy: the prior
file in . . ./tmp/legacy/bin/ is never directly
preserved. (The new copy might still be identical
to the old one: the source path one might happen to
be identical as well.)
# Link the tools that we need for building but don't need to bootstrap =
because
# the host version is known to be compatible into ${WORLDTMP}/legacy
# We do this before building any of the bootstrap tools in case they =
depend on
# the presence of any of the links (e.g. as m4/lex/awk)
${_bt}-links: .PHONY
.for _tool in ${_bootstrap_tools_links}
${_bt}-link-${_tool}: .PHONY
@rm -f "${WORLDTMP}/legacy/bin/${_tool}"; \
source_path=3D`which ${_tool}`; \
if [ ! -e "$${source_path}" ] ; then \
echo "Cannot find host tool '${_tool}'"; false; \
fi; \
cp -pf "$${source_path}" "${WORLDTMP}/legacy/bin/${_tool}"
${_bt}-links: ${_bt}-link-${_tool}
.endfor
Note: This is for the !defined(BOOTSTRAP_ALL_TOOLS) case.
Note: the code uses the abbreviation: _bt=3D _bootstrap-tools
_bootstrap_tools_links is built mostly in terms of
_basic_bootstrap_tools and _basic_bootstrap_tools_multilink from
earlier logic. For reference, showing what ends up handled
this way:
# grep -r "_bootstrap_tools" /usr/main-src/Makefile* =
/usr/main-src/share/ | more
/usr/main-src/Makefile.inc1:# _bootstrap_tools_links variable.
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dm4 lex
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dmtree
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dcat
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dcrunchide
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dcrunchgen
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dmkimg
/usr/main-src/Makefile.inc1:_kerberos5_bootstrap_tools=3D \
/usr/main-src/Makefile.inc1:.ORDER: =
${_kerberos5_bootstrap_tools:C/^/${_bt}-/g}
/usr/main-src/Makefile.inc1:.for _tool in ${_kerberos5_bootstrap_tools}
/usr/main-src/Makefile.inc1:# The tools listed in _basic_bootstrap_tools =
will generally not be
/usr/main-src/Makefile.inc1:# case we use the =
_basic_bootstrap_tools_multilink variable which is a list of
=
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools_multilink=3Dusr.bin/gre=
p grep,egrep,fgrep
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools_multilink+=3Dbin/test =
test,[
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/cut =
bin/expr usr.bin/gencat usr.bin/join \
=
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools_multilink+=3Dusr.bin/aw=
k awk,nawk
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/file2c
=
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools_multilink+=3Dusr.bin/bi=
ntrans uuencode,uudecode
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/xargs
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/cap_mkdb
=
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.sbin/services_mk=
db usr.sbin/pwd_mkdb
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/ldd
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dbin/chflags
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3Dsysctl
=
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3Dtools/build/cross-bu=
ild/fake_chflags
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/mkfifo
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.bin/jot
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dsbin/md5
/usr/main-src/Makefile.inc1:_basic_bootstrap_tools+=3Dusr.sbin/tzsetup
=
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3D${_basic_bootstrap_t=
ools}
/usr/main-src/Makefile.inc1:.for _subdir _links in =
${_basic_bootstrap_tools_multilink}
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3D${_subdir}
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3Dusr.bin/bmake
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3Dlib/libbz2
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3Dlib/libz
/usr/main-src/Makefile.inc1:_other_bootstrap_tools+=3Dlib/libcrypt
/usr/main-src/Makefile.inc1:# All tools in _basic_bootstrap_tools have =
the same name as the subdirectory
=
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3D${_basic_bootstrap_t=
ools:T}
/usr/main-src/Makefile.inc1:.for _subdir _links in =
${_basic_bootstrap_tools_multilink}
/usr/main-src/Makefile.inc1:_bootstrap_tools_links+=3D${_links:S/,/ /g}
/usr/main-src/Makefile.inc1:.for _tool in ${_bootstrap_tools_links}
/usr/main-src/Makefile.inc1: ${_kerberos5_bootstrap_tools} \
/usr/main-src/Makefile.inc1: ${_other_bootstrap_tools} \
What the prior installworld did for the analogous files is
a separate issue.
=3D=3D=3D
Mark Millard
marklmi at yahoo.com
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?A6A8EA3C-7D14-4467-B00E-388685C4A7F4>