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

From: Andrea Corallo
Subject: Re: --with-native-compilation build failure on 32-bit systems
Date: Tue, 09 Aug 2022 09:21:11 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

Andrea Corallo <akrl@sdf.org> writes:


> Just had some time to look into this further:
> Of all the CUs we are dumping two are not fixed-up in loadup.el before
> dump because not referenced by any function.
> In particular looking at 'ediff-hook' it does contain only variable
> definitions so this is correct.
> We do run a GC before dumping so we should unload these unreferenced CUs
> before dump.  And as expected I don't see ediff-hook CU being marked but
> we do not free it during sweep.
> It looks to me like a GC bug so far.  Unfortunatly I've very constrained
> time to dedicate on this this week.

Thinking about this... Maybe relying on the GC for this is not a very
good idea in the first place.  If we are conservative on the stack my
might always mark a CU accidentally and fall into the same issue.

I think we should maintain a list of all loaded CUs so we can fix them
up reliably.  If this is agreed not to be a bad idea I'll prepare a



PS still dunno what's going on with the GC here

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