On Thu, Nov 04, 2021 at 11:46:34PM +0900, Jean-Christophe Helary wrote:
> 
> 
> > On Nov 4, 2021, at 23:09, Johannes Brauer <brauer@nordakademie.de> wrote:
> > 
> > 
> >> Am 04.11.2021 um 14:57 schrieb Jean-Christophe Helary <lists@traduction-libre.org>:
> >> 
> >> 
> >> 
> >>> On Nov 4, 2021, at 22:35, Johannes Brauer <brauer@nordakademie.de> wrote:
> >>> 
> >>> Warning: arch-dependent data dir '/Users/build/workspace/Emacs-Multi-Build/label/macos10.14/emacs-source/nextstep/Emacs.app/Contents/MacOS/libexec/': No such file or directory

[...]

To me, libexec sounds like a place where Emacs looks for
external executables (which probably come with the Emacs
distribution itself).

> I checked on my side and MacOS/libexec does not seem to contain extremely important files:
> /MacOS/libexec/rcs2log

[...]

Exactly. So your Emacs might complain if you do anything
it would need one of those external programs for.

Perhaps your installation has put them elsewhere? Or
perhaps the ever-stranger OS has somehow blocked access
to it in a weird way?

Cheers
 - t