bug#48079: Temporary files while building after native-comp merge

[Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Stefan Kangas <stefan@marxist.se> writes:

> tags 48079 - patch
> thanks
>
> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
>> Stefan Kangas <stefan@marxist.se> writes:
>>
>>> But perhaps the fix is as simple as:
>>>
>>> diff --git a/.gitignore b/.gitignore
>>> index fcbc9cd7f4..e27ebe36d0 100644
>>> --- a/.gitignore
>>> +++ b/.gitignore
>>> @@ -135,6 +135,7 @@ src/gl-stamp
>>>  *.dll
>>>  *.core
>>>  *.elc
>>> +*.elc[0-9A-Za-z][0-9A-Za-z][0-9A-Za-z][0-9A-Za-z][0-9A-Za-z][0-9A-Za-z]
>>>  *.eln
>>>  *.o
>>>  *.res
>>
>> Sounds like a good idea to me.  (But add a comment about what these
>> files are.)
>
> Thanks.
>
> But now I am seeing that some of these files have not been deleted in my
> tree:
>
>     lisp/emacs-lisp/comp.elcivrXZS
>     lisp/window.elc9aaVMg
>
> This might be because I interrupted the build process at some point; I
> don't know.
>
> These files don't get removed when I run extraclean or bootstrap.  So if
> we just ignore them there is a risk that these files will slowly build
> up over time.
>
> Perhaps we should also make sure they get cleaned up when building, as
> in the attached.

I'm not sure is correct to do that in compile-clean, if there's really a
problem IMO we should isolate it and debug, IIUC having this in
compile-clean could just mask it.

  Andrea