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Re: --with-native-compilation build failure on 32-bit systems

From: Lynn Winebarger
Subject: Re: --with-native-compilation build failure on 32-bit systems
Date: Fri, 5 Aug 2022 11:16:39 -0400

On Fri, Aug 5, 2022, 10:42 AM Andrea Corallo <akrl@sdf.org> wrote:
Andrea Corallo <akrl@sdf.org> writes:

> Lars Ingebrigtsen <larsi@gnus.org> writes:
>> Joseph Mingrone <jrm@ftfl.ca> writes:
>>> Could 261d6af have broken --with-native-compilation builds on 32-bit
>>> systems?  This is what I see building in a clean FreeBSD/i386 13.0
>>> jail using 261d6af:
>>> http://pkg.ftfl.ca/data/13i386-default/2022-08-04_22h38m28s/logs/errors/emacs-devel-,2.log
>> I guess these are the error messages?
>> emacs: Trying to load incoherent dumped eln file
>> /wrkdirs/usr/ports/editors/emacs-devel/work-full/emacs-261d6af/native-lisp/29.0.50-7cc1a43d/preloaded/ediff-hook-0b92f1a2-f843c8a0.eln
>> I don't know what that means; Andrea added to the CCs.
> It's very surprising to see 261d6af causing this side effect, at least I
> don't see why should effect the 32bit build only.
> I'm trying to reproduce it on my 32bit env.

I confirm the build it's broken on my 32bit env as well, (but not on the
64 one).

Loading the second dump, while we are relocating the ediff-hook
compilation unit, we realize (@ pdumper.c:5304) that its file field is
not a cons as expected but just a string.

Now the question is why this is not fixed-up in loadup.el:477 as for the
other compilation units?

Are you sure it's actually fixed up in the other compilation units?  When I've seen this problem, it was because the bindir and elndir arguments were not specified while dumping.  The complaint came up from one of the later (but not last) files I had loaded for dumping, but none of the files were fixed up.

This problem should be signaled by loadup if there are any NCUs it does not fix up.  It would be a lot easier to diagnose the problem from there.


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