Re: Personal aarch64 FreeBSD OS build gets SIGSEGV during: ./pmu-events/jevents arm64 /usr/main-src/lib/libpmc/pmu-events/arch libpmc_event [cause identified]

On 9/20/26 18:54, Mark Millard wrote:
> On 9/20/26 11:13, Mark Millard wrote:
>> [I have CC'd a could of authors with recent libpmc commits. I did not
>> list any recent libc authors.]
>>
>> . . .
>>
> 
> I found the type of problem --but it is not a obvious extension of
> the prior material: META_MODE recorded something that indicates the
> actual problem . . .
> 
> /usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libpmc/pmu-events/jevents.pieo.meta:R
> 12651 /usr/include/fts.h
> 
> The build is using the /usr/include/fts.h from the live old system
> while trying to build the new system.
> 
> Given the FTSENT change of layout from old to new, that does not
> work. Also, this is not something that clearing out /usr/obj/ . . .
> and rebuilding fixes.
> 
> The build of lib/libpmc/pmu-events/jevents.* should get the fts.h
> file from the source tree being built, in my case I was working in
> /usr/main-src/ so:
> 
> # find -s /usr/main-src/ -name fts.h -print
> /usr/main-src/include/fts.h
> 
> lists a path to the file that should have been used for the build.
> 
> I expect that this would be a libpmc development issue, not a fts
> development issue for who solves it.
> 
> 
> Also: this turns out to not be an arm specific problem.
> 
> 

The problematic include handling for building system updates extends far
beyond the specific example in jevents.pieo.meta : All but 8 of the many
include file usages were strictly tied to the old live system instead of
to the new system's source tree (to some degree):
(The ones that mention main-src are those that involve the source tree
that I was doing the build for.)

# grep -e /include/ -e '\.h$'
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libpmc/pmu-events/jevents.pieo.meta
R 12651 /usr/include/sys/param.h
R 12651 /usr/include/sys/_null.h
R 12651 /usr/include/sys/_param.h
R 12651 /usr/include/sys/types.h
R 12651
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/tmp/legacy/usr/include/sys/cdefs.h
R 12651
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/tmp/legacy/usr/include/sys/_decls.h
R 12651
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/tmp/legacy/usr/include/sys/_visible.h
R 12651 /usr/include/machine/endian.h
R 12651 /usr/include/sys/_types.h
R 12651 /usr/include/machine/_types.h
R 12651 /usr/include/sys/_endian.h
R 12651 /usr/include/sys/_offsetof.h
R 12651 /usr/include/sys/_pthreadtypes.h
R 12651 /usr/include/sys/_stdint.h
R 12651 /usr/include/sys/bitcount.h
R 12651 /usr/include/sys/select.h
R 12651 /usr/include/sys/_sigset.h
R 12651 /usr/include/sys/_timeval.h
R 12651 /usr/include/sys/timespec.h
R 12651 /usr/include/sys/_timespec.h
R 12651 /usr/include/sys/syslimits.h
R 12651 /usr/include/sys/signal.h
R 12651 /usr/include/sys/_sigaltstack.h
R 12651 /usr/include/sys/_sigval.h
R 12651 /usr/include/machine/_limits.h
R 12651 /usr/include/machine/signal.h
R 12651 /usr/include/machine/param.h
R 12651 /usr/include/sys/_align.h
R 12651 /usr/include/sys/limits.h
R 12651 /usr/include/sys/_maxphys.h
R 12651 /usr/include/sys/resource.h
R 12651 /usr/include/sys/stat.h
R 12651 /usr/include/sys/time.h
R 12651 /usr/include/sys/_clock_id.h
R 12651 /usr/include/time.h
R 12651 /usr/include/xlocale/_time.h
R 12651 /usr/include/ctype.h
R 12651 /usr/include/_ctype.h
R 12651 /usr/include/runetype.h
R 12651 /usr/include/xlocale/_ctype.h
R 12651 /usr/include/dirent.h
R 12651 /usr/include/sys/dirent.h
R 12651 /usr/include/errno.h
R 12651 /usr/include/libgen.h
R 12651 /usr/include/limits.h
R 12651 /usr/include/stdarg.h
R 12651 /usr/include/sys/_stdarg.h
R 12651
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/tmp/legacy/usr/include/stddef.h
R 12651 /usr/include/stddef.h
R 12651 /usr/include/stdio.h
R 12651 /usr/include/stdlib.h
R 12651 /usr/include/string.h
R 12651 /usr/include/strings.h
R 12651 /usr/include/xlocale/_strings.h
R 12651 /usr/include/xlocale/_string.h
R 12651 /usr/include/unistd.h
R 12651 /usr/include/sys/unistd.h
R 12651 /usr/include/ftw.h
R 12651 /usr/main-src/lib/libpmc/pmu-events/list.h
R 12651 /usr/main-src/lib/libpmc/pmu-events/jsmn.h
R 12651 /usr/main-src/lib/libpmc/pmu-events/json.h
R 12651 /usr/include/stdbool.h
R 12651 /usr/main-src/lib/libpmc/pmu-events/pmu-events.h
R 12651 /usr/include/fts.h


Some of those may be lower risk of incompatible changes than others but
the general trend is not good for doing system builds when layout
changes or other incompatibilities are introduced.

Of course, there are some things that are built for operation on the
older system instead of the newer one. So the classification is case by
case across the various *.meta files.


Taking a quick stab at finding other examples (incomplete because of the
failed build):

# find -s /usr/obj/BUILDs/main-CA76-nodbg-clang/ -name \*.meta -exec
grep -l -e ' /usr/include/' {} \; | grep -v /tmp/obj-tools/
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/bin/csh/gethost.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/bin/sh/mknodes.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/bin/sh/mksyntax.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/host-osreldate.h.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libmagic/mkmagic.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libpmc/pmu-events/jevents.pieo.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libpmc/pmu-events/jsmn.pieo.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/libpmc/pmu-events/json.pieo.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/ncurses/tinfo/make_hash.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/lib/ncurses/tinfo/make_keys.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/rescue/rescue/usr/main-src/bin/csh/gethost.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/rescue/rescue/usr/main-src/bin/sh/mknodes.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/rescue/rescue/usr/main-src/bin/sh/mksyntax.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/armscii8-2haik8.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/iso-8859-1_to_cp437.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/iso-8859-4_for_vga9.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/iso-8859-7_to_cp437.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/koi8-r2cp866.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/koi8-u2cp866u.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/share/syscons/scrnmaps/us-ascii_to_cp437.mk.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/usr.bin/awk/maketab.meta
/usr/obj/BUILDs/main-CA76-nodbg-clang/usr/main-src/arm64.aarch64/usr.bin/vi/catalog/dump.meta


-- 
===
Mark Millard
marklmi at yahoo.com