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Re: Objects that can't be purified during dumping

From: Lynn Winebarger
Subject: Re: Objects that can't be purified during dumping
Date: Sat, 23 Jul 2022 09:59:18 -0400

On Sat, Jul 23, 2022, 9:27 AM Eli Zaretskii <eliz@gnu.org> wrote:
> From: Lynn Winebarger <owinebar@gmail.com>
> Date: Sat, 23 Jul 2022 08:19:35 -0400
> In my quest to have a "fully loaded" emacs, I'm attempting to dump a version that loads about 2400 features
> in site-load.el.

Dump how? with the portable dumping?  If so, we don't yet fully
support re-dumping, although it's a goal we'd like to reach.

I might be confused, but I thought redumping referred to dumping using an already dumped emacs.  I'm trying to bootstrap emacs with these additional features loaded in the initial dump.

> Attempting to load email/rfc2047 produces an error to the effect that purecopy does not know how to purify a
> char table (specifically a syntax table). 
> Is there a reason objects that aren't specifically recognized as being "purifiable" can't just be marked as
> pinned like hash table without the purecopy attribute?  I mean, if I put that in the code, are there foreseeable
> bugs that would result?

Pure space will go away at some point, so we are unlikely to invest
any effort into fixing this.

I recalled seeing an exchange to that effect on this list.   I'll try the hack (on alloc.c) and see if it works as an interim solution. 


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