bug#44743: native-comp: confirm-exit-emacs warns about active processes when compiling

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Lars Ingebrigtsen <larsi@gnus.org>
>> Cc: Andrea Corallo <akrl@sdf.org>,  stefan@marxist.se,  44743@debbugs.gnu.org
>> Date: Tue, 24 Nov 2020 08:52:18 +0100
>>
>> Eli Zaretskii <eliz@gnu.org> writes:
>>
>> > FWIW, I think this should be controlled by a user option.  It is not
>> > at all obvious that everyone would like compilation processes to be
>> > killed automatically, people might want to wait for them to complete.
>>
>> Since this is something that Emacs does automatically, in the
>> background, I don't think a user option sounds like something somebody
>> would want to tweak.
>
> IMO, we should offer an option precisely _because_ this is in
> background, thus the user could be unaware of the compilation being
> run.  Since compilation takes non-negligible time, I envision users
> who'd like to wait for a few moments if that gave them faster Lisp
> next time.
>
> This is not unlike background subprocesses about which we do ask on
> exit.

IIUC, it's different from other background processes.  The compilation
will resume automatically the next time that file is loaded in
subsequent invocations of Emacs.