FYI: WITH_REPRODUCIBLE_BUILD= problem for some files?

[Mark Millard]

On 2021-May-3, at 07:47, Ed Maste <emaste at freebsd.org> wrote:

> On Thu, 29 Apr 2021 at 02:50, Mark Millard via freebsd-current
> <freebsd-current at freebsd.org> wrote:
>> 
>> 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...
> 
> This is unexpected. Unfortunately I haven't looked at reproducibility
> in a while, and my work was all on x86. This could be a regression or
> a longstanding issue with arm64.
> 
> If you install the diffoscope package (py37-diffoscope) and run it on
> the two directories / files it should give a more convenient view of
> the differences. (Or, if you can make a tarball of the differing files
> I can take a look.)

I no longer have the same content in those directory
trees: newer rebuild and the same buildworld used to
installworld to both places, instead of 2 different
buildworld's. I'm also unsure how reproducible getting
differences was.

I can eventually do experiments to test multiple separate
buildworld's and installworld's, but the machine is busy
building ports and the llvm builds involved means it
will be some time before I'd switch activities. And the
buildworld's involve llvm builds as well and take notable
time themselves. So my next comparison will not be any
time soon.

I'll let you know if I manage to generate another example,
this time being sure to keep the data. If I try multiple
times without finding any differences, I'll eventually
decide "enough is enough" and let you know.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)