Re: Loading tramp for dump goes into infinite regress

[Lynn Winebarger <owinebar@gmail.com>]

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On Mon, Jul 25, 2022, 8:28 PM Lynn Winebarger <owinebar@gmail.com> wrote:

> On Mon, Jul 25, 2022, 12:54 PM Stefan Monnier <monnier@iro.umontreal.ca>
> wrote:
>
>> > Otherwise, I was able to resolve the various issues (including some
>> > extensive surgery on vc/ediff-X files to stamp out the circular
>> loading).
>> > I am going to have to do a real bootstrap to avoid the "incoherent eln"
>> > error, though, and somehow force native compilation for all the
>> libraries
>> > loaded in the dump (that are not on the compiler's "forbidden" list,
>> > anyway).
>>
>> BTW, I don't really understand why you're bumping into circularity issue
>> with things like ediff.  I do know it has circularity issues, but they
>> only affect compilation, AFAIK.
>>
>
> The C code for the require form hits the panic button if it has to load
> something when dump-mode is non-nil.  Something similar happens when an
> autoload is invoked during dump-mode, but I haven't looked for the exact
> piece of code that does it so I don't know if it's C or lisp.
>
> So, I'm wondering: do you include "the world" in both dumps (the
>> first, done to build `src/bootstrap-emacs.pdmp`, and the second to
>> build the final `src/emacs.pdmp`) or do you include it only
>> in the second dump?
>>
>
> I initially was trying to just run the second one, but I got the
> "incoherent ELN" error.  So I set up a new build directory, did a fresh
> configure followed by "make bootstrap".  I had to further refine the
> site-load.el to explicitly load everything required at compile time, wrap
> every instance of any expression requiring a generated file with "unless
> dump-mode" (since in dump-mode the site-load or loadup file must load all
> the required files to work anyway).  That fails when site-load starts
> loading bits of cc-mode for the second dump since none of the files in
> site-load are even byte-compiled with the bootstrap emacs.  So I generated
> a list of .elc targets from site-load (same method used for lisp.mk),
> then put together a hacked Makefile in BUILD/lisp that ran the
> bootstrap-emacs executable with the suffix rule from the standard
> Makefile.  That also failed with the incoherent ELN message.  Then I
> noticed the rule that uses the "byte-compile-refresh-preloaded" function,
> so I'm trying that in the Makefile.  However, I'm still waiting for the
> preloaded files to finish native compiling.
>
> I'd be happy to follow the 3 step path to dumping, but I thought the whole
> "no redumping support" prevented that approach.
>

Even native compiling using the bootstrap emacs with
byte-compile-refresh-preloaded is failing.  I might try redoing the
bootstrap, then run the native compiler on the site-load files
sequentially. That will take several hours at least, though.

Lynn

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