bug#55305: 28.0.50: With async nativecomp, package manager fails to load hyperbole-autoloads.el before compilation

[Eli Zaretskii <eliz@gnu.org>]

> From: Robert Weiner <rsw@gnu.org>
> Date: Sat, 7 May 2022 16:05:17 -0400
> 
> Tested under Emacs 28.1 and a recent tip of the Emacs git repo for Emacs
> 29 with asynchronous native compilation enabled:
> 
> M-x package-install RET hyperbole RET
> 
> fails to load the hyperbole-autoloads.el file before the
> async native compiler and byte compiler produce these errors since
> the autoloaded var:append function is not defined:

Hyperbole is not part of Emacs, so this problem should first be taken
up with the Hyperbole developers.

> Warning (comp): ~/.emacs.d/elpa/hyperbole-8.0.0/hui-em-but.el: Error: Symbol's function definition is void
> var:append Disable showing Disable logging
> Warning (comp): ~/.emacs.d/elpa/hyperbole-8.0.0/hui-mouse.el: Error: Symbol's function definition is void
> var:append Disable showing Disable logging
> Warning (comp): ~/.emacs.d/elpa/hyperbole-8.0.0/hbut.el: Error: Symbol's function definition is void
> var:append Disable showing Disable logging
> 
> The package manager definitely generates hyperbole-autoloads.el at some
> point though I do not know if it is before these errors are produced.

Do the *.el files that produce the error 'require' or 'load'
hyperbole-autoloads?  If not, how would compilation know to load that
file?  Asynchronous native compilation runs in a separate pristine
Emacs session, so it needs every dependency explicitly spelled out, or
it will fail.

But again, I think this is a matter for the Hyperbole developers to
look into first.

Thanks.