bug#15803: default-file-name-coding-system: utf-8 better than latin-1 these days?

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: rgm@gnu.org,  15803@debbugs.gnu.org
> Date: Thu, 10 Sep 2020 15:07:12 +0200
> 
> > Please try building Emacs from a pristine tarball or a clean
> > repository in a directory with non-ASCII characters, under a
> > non-UTF-8, non-C locale.  If that works, I think this is good to go.
> 
> All the tools under Linux are so utf-8-focused these days...  let's
> see...  I first, under a utf-8 locale created the directory "émacs",
> then converted it to 8859-1:

No, please create the directory with non-ASCII name _after_ switching
the locale to Latin-1.

> And then I build Emacs there, and it seems to work fine.  Then I apply
> the patch and say "make:
> 
> Loading /home/larsi/src/emacs/�*macs/lisp/subdirs.el (source)...
> >>Error occurred processing ../lisp/international/mule-cmds.el: File is 
> >>missing (("Opening input file" "No such file or directory" 
> >>"/home/larsi/src/emacs/�*macs/lisp/international/mule-cmds.el"))
> make[2]: *** [Makefile:279: ../lisp/international/mule-cmds.elc] Error 1
> make[1]: *** [Makefile:784: ../lisp/international/mule-cmds.elc] Error 2
> make[1]: Leaving directory '/home/larsi/src/emacs/�*macs/src'
> 
> So that fails pretty much immediately...
> 
> OK, let's try a make bootstrap...
> 
> And now building Emacs works fine.  So it seems like a make bootstrap is
> necessary after applying the patch.
> 
> And starting Emacs works fine.
> 
> But "make check" fails miserably:
> 
> make[3]: *** [Makefile:165: src/eval-tests.elc] Error 1
>   ELC      src/font-tests.elc
> >>Error occurred processing src/fileio-tests.el: File is missing (("Doing 
> >>chmod" "No such file or directory" 
> >>"/home/larsi/src/emacs/\301\203*macs/test/src/fileio-tests.elc7HRcu0"))
> 
> So...

This all happens because the directory name doesn't correspond to the
locale.  You need to create the directory in the 8859-1 locale.