Should glibc provide a builtin C.UTF-8 locale?

[Martin Sebor]

On 10/21/2015 11:49 AM, Mike Frysinger wrote:
> i've created a C.UTF-8 page where i've tried to gather all the points
> people made in this thread:
> 	https://sourceware.org/glibc/wiki/Proposals/C.UTF-8
>
> can people read it over and make sure i didn't miss anything and just
> fix/update it when i did ;).

I wonder if there's a misunderstanding here (possibly mine of
the intent the text is trying to convey).

In 2.2 Defaults, the page says that

   POSIX does not require any specific locale be the default:

     All implementations shall define a locale as the default locale,
     to be invoked when no environment variables are set, or set to
     the empty string. This default locale can be the POSIX locale
     or any other implementation-defined locale.

The words quoted from the POSIX spec refer to the default locale
for POSIX utilities (ass A.8.2, Internationalization Variables).
They don't mean that all C programs should or are allowed to start
in an implementation-defined locale.  All C and POSIX programs are
required to start in the "C" locale (see setlocale in C11 and the
execve page in POSIX).

If the goal is to provide C.UTF-8 as the default for programs
that call setlocale(LC_ALL, "") when no localization environment
variables are set (or set to the empty string), I would suggest
to make it clear.

Martin