I did 2 test buildworld's based on: # ~/fbsd-based-on-what-freebsd.sh branch: releng/13.0 merge-base: ea31abc261ffc01b6ff5671bffb15cf910a07f4b merge-base: CommitDate: 2021-04-09 00:14:30 +0000 ea31abc261ff (HEAD -> releng/13.0, tag: release/13.0.0, freebsd/releng/13.0) 13.0: update to RELEASE n244733 (--first-parent --count for merge-base) and produced separate build trees. I also installed the world build into two separate directory trees: /usr/obj/DESTDIRs/13_0R-CA7-chroot/ vs. /usr/obj/DESTDIRs/13_0R-CA7-poud/ This was for other reasons. But eventually I happened to do a diff -rq of the two trees and ended up with the output showing some differing files: Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/sbin/ping and /usr/obj/DESTDIRs/13_0R-CA7-poud/sbin/ping differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/sbin/ping6 and /usr/obj/DESTDIRs/13_0R-CA7-poud/sbin/ping6 differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/bin/ntpq and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/bin/ntpq differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/lib/debug/sbin/ping.debug and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/lib/debug/sbin/ping.debug differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/lib/debug/usr/sbin/ntpd.debug and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/lib/debug/usr/sbin/ntpd.debug differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/lib/debug/usr/tests/sbin/ping/in_cksum_test.debug and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/lib/debug/usr/tests/sbin/ping/in_cksum_test.debug differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/sbin/ntp-keygen and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/sbin/ntp-keygen differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/sbin/ntpd and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/sbin/ntpd differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/sbin/ntpdate and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/sbin/ntpdate differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/sbin/ntpdc and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/sbin/ntpdc differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/sbin/sntp and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/sbin/sntp differ Files /usr/obj/DESTDIRs/13_0R-CA7-chroot/usr/tests/sbin/ping/in_cksum_test and /usr/obj/DESTDIRs/13_0R-CA7-poud/usr/tests/sbin/ping/in_cksum_test differ (That is all.) For as much as I've looked at (not much), it looks to be variations in byte-padding values. The builds both were set up to tune for cortex-a7 explicitly. I patch top's source code. I patch the OOM kill code to report the specific reason for a kill. I still have some bcm2838 pci/xhci patching in place from an old investigation, but that would be kernel code. None of the patching is specific to the above list of files. The hosting context was: # uname -apKU FreeBSD CA72_4c8G_ZFS 13.0-RELEASE FreeBSD 13.0-RELEASE #1 releng/13.0-n244733-ea31abc261ff-dirty: Wed Apr 28 05:45:27 PDT 2021 root_at_CA72_4c8G_ZFS:/usr/obj/BUILDs/13_0R-CA72-nodbg-clang/usr/src/arm64.aarch64/sys/GENERIC-NODBG-CA72 arm64 aarch64 1300139 1300139 based on building the same source code (tuning for cortex-a72). It was the same media for all the activity. Unlike the past many years for me, the context is using ZFS instead of UFS, not that I think that makes a difference here. The differences do not mess up my activity but others might notice and care about such differences. === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)Received on Thu Apr 29 2021 - 04:50:39 UTC
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