PS:

Alternatively to the suggestion of a new gnulib-tool option
"--vc-files=...", one could also make Gnulib's behavior dependent on the
presence of a file, say ".gnulib-in-tree-build". This has the advantage
that no source files have to be changed to switch from one behavior to the
other but that, in principle, a developer can decide to switch to in-tree
builds by touching such a file locally.

Am Fr., 9. Apr. 2021 um 13:16 Uhr schrieb Marc Nieper-Wißkirchen <
marc.nieper+gnu@gmail.com>:

> I have been experimenting a bit with building in a dedicated build
> directory. Nevertheless, I still end up with artefacts in the source
> directory, which are not covered by Gnulib's .gitignore files, for example
> with:
>
> lib/iconv_open-aix.h
> lib/iconv_open-hpux.h
> lib/iconv_open-irix.h
> lib/iconv_open-osf.h
> lib/iconv_open-solaris.h
> lib/iconv_open-zos.h
>
> Thanks,
>
> Marc
>
> Am Sa., 3. Apr. 2021 um 12:22 Uhr schrieb Bruno Haible <bruno@clisp.org>:
>
>> Marc Nieper-Wißkirchen wrote:
>> > Would it do much harm if ".gitignore" included all built files even for
>> > developers that work in a dedicated build tree?
>>
>> The developers who are using the first approach will not like this.
>>
>> Bruno
>>
>>