Need help with getting a package to build reproducibly on arm*

[Michael Hudson-Doyle]

On Sat, 9 Jan 2021 at 00:52, Michael Biebl <biebl at debian.org> wrote:

> Am 07.01.21 um 22:39 schrieb Michael Hudson-Doyle:
>
> > I'm hardly an expert in such things but it looks to me as if gcc is
> > ordering things differently between the two builds:
> >
> >
> https://tests.reproducible-builds.org/debian/dbd/unstable/arm64/systemd_247.2-4.diffoscope.html#systemd-tests_---.---_arm--.deb---data.tar.xz---data.tar---.-usr-lib-systemd-tests-manual-test-udev---objdump---line-numbers---disassemble---demangle---reloc---no-show-raw-insn---section-.text---
> >
> > and all the other differences follow on from that. Unless systemd is
> using
> > particularly strange compiler options,
>
> cflags:
>
> https://salsa.debian.org/systemd-team/systemd/-/blob/debian/master/meson.build#L343
>
> linkflags:
>
> https://salsa.debian.org/systemd-team/systemd/-/blob/debian/master/meson.build#L401


Those don't look particularly exotic to me.

We do build with LTO enabled.
>

I guess that could be the culprit. Would still be a gcc bug though AIUI.

Cheers,
mwh
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