[PATCH v2] kbuild: replace LANG=C with LC_ALL=C

[Greg KH]

On Fri, Apr 30, 2021 at 10:56:27AM +0900, Masahiro Yamada wrote:
> LANG gives a weak default to each LC_* in case it is not explicitly
> defined. LC_ALL, if set, overrides all other LC_* variables.
> 
>   LANG  <  LC_CTYPE, LC_COLLATE, LC_MONETARY, LC_NUMERIC, ...  <  LC_ALL
> 
> This is why documentation such as [1] suggests to set LC_ALL in build
> scripts to get the deterministic result.
> 
> LANG=C is not strong enough to override LC_* that may be set by end
> users.
> 
> [1]: https://reproducible-builds.org/docs/locales/
> 
> Signed-off-by: Masahiro Yamada <masahiroy at kernel.org>
> Acked-by: Michael Ellerman <mpe at ellerman.id.au> (powerpc)
> Reviewed-by: Matthias Maennich <maennich at google.com>
> Acked-by: Matthieu Baerts <matthieu.baerts at tessares.net> (mptcp)

Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>