Re: index sorting in texi2any in C issue with spaces

[pertusus]

On Fri, Feb 02, 2024 at 08:57:01AM +0200, Eli Zaretskii wrote:
> > From: Gavin Smith <gavinsmith0123@gmail.com>
> > Date: Thu, 1 Feb 2024 22:16:07 +0000
> > Cc: Patrice Dumas <pertusus@free.fr>, bug-texinfo@gnu.org
> > 
> > On Thu, Feb 01, 2024 at 09:01:42AM +0200, Eli Zaretskii wrote:
> > > > Date: Wed, 31 Jan 2024 23:11:02 +0100
> > > > From: Patrice Dumas <pertusus@free.fr>
> > > > 
> > > > That would not be difficult to implement as a customization variable.
> > > > What about COLLATION_LANGUAGE?
> > > 
> > > What would be the possible values of this variable, and in what format
> > > will those values be specified?
> > 
> > I imagine it would be a locale name for passing to newlocale and thence
> > to strxfrm_l.  What Patrice implemented hardcord the name "en_US.utf-8"
> > but this would be a possible value.
> 
> I think en_US.utf-8 is (or at least can be by default) a combination
> of @documentlanguage and @documentencoding.

I try to make the index collation as independent as possible of
@documentencoding and output encoding.  Here the utf-8 is meant to
provide a sorting 'independent' of the encoding.

Regarding the language for now the aim was to have something as
similar as the Perl output, which is obtained without a locale.  The
choice of en_US was motivated by that aim.  I looked at the
/usr/lib/locale/*/LC_COLLATE files on my debian GNU/Linux and there was
no "en.utf-8", which would have been my first choice, so I used
"en_US.utf-8".

-- 
Pat