Re: Preview: portable dumper

[Daniel Colascione]

On 02/15/2018 05:54 PM, Stefan Monnier wrote:
> > I do wonder whether it makes sense to try to copy the dump into the
> > Emacs executable itself instead of leaving it as a separate file.
>
> We could try, but:
> - it adds complexity and maybe system-dependent hacks.

Not if we just tack onto the end.

> - it closes the opportunity to have several dump files for a single
>    executable (I was thinking we could try and let end-users build their
>    own dump file).
Not necessarily. Suppose we go with the append-to-the-executable option. 
Then, to "re-dump" emacs, we'd open the current executable, copy it to a 
temporary file, back up to the start of the dump, ftruncate. Now we've 
recovered temacs and we can go through normal loadup and dump.

Maybe we can even automatically detect changes to any file in 
load-history and perform this procedure automatically on startup.