[Reproducible-builds] Bug#803718: Bug#803060: elc files in emacs24-common are older than .el.gz in emacs24-el

Rob Browning rlb at defaultvalue.org
Sat Nov 7 17:40:06 UTC 2015

Rob Browning <rlb at defaultvalue.org> writes:

> It looks like it's dh_strip_nondeterminism that's changing the timestamp
> on the .el.gz file, and hence making emacs think that the source file is
> newer than the byte-compiled file.
> I suspect it may make sense to have some way to get strip-nondeterminism
> to preserve them, so I'm assigning a clone of this bug there.

Also, I'm not certain, but I believe Emacs may already be omitting the
timestamps via gzip -n.  If so, then another, more general approach
might be to either detect that the gz file is already deterministic, or
to strip to a temp file, and only replace the original when there's
actually a difference.

For now I'm just hacking around the problem in emacs24 with an override
that saves/restores the .el.gz timestamps before/after

Rob Browning
rlb @defaultvalue.org and @debian.org
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