[Buildroot] [PATCH] Makefile: generate KBUILD_BUILD_TIMESTAMP date whith LANG=C

["Jérôme Pouiller" <jezz@sysmic.org>]

Hello Jean-Baptiste,

On Tuesday 06 December 2016 11:10:01 Jean-Baptiste Tr?dez wrote:
> Fix kernel reproducible build if LANG=fr_FR.UTF-8 in host system.
> 
> when building linux kernel, scripts/gen_initramfs_list.sh do 'date -d"$KBUILD_BUILD_TIMESTAMP" +%s'
> In buildroot makefile, KBUILD_BUILD_TIMESTAMP="$(shell date -d @$(SOURCE_DATE_EPOCH))"
> if LANG=fr_FR.UTF-8 in host system, it does not work :
> - LANG=C date -d"$(LANG=C date)" : ok
> - LANG=C date -d"$(LANG=fr_FR.UTF-8 date)" : error

Good catch.

> ---
>  linux/linux.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/linux/linux.mk b/linux/linux.mk
> index a63d1f3..554c5f1 100644
> --- a/linux/linux.mk
> +++ b/linux/linux.mk
> @@ -99,7 +99,7 @@ LINUX_MAKE_ENV += \
>  	KBUILD_BUILD_VERSION=1 \
>  	KBUILD_BUILD_USER=buildroot \
>  	KBUILD_BUILD_HOST=buildroot \
> -	KBUILD_BUILD_TIMESTAMP="$(shell date -d @$(SOURCE_DATE_EPOCH))"
> +	KBUILD_BUILD_TIMESTAMP="$(shell LANG=C date -d @$(SOURCE_DATE_EPOCH))"

It should also possible to fix problem using backquotes:

  KBUILD_BUILD_TIMESTAMP="`date -d @$(SOURCE_DATE_EPOCH)`"

I find it lighter.



BR,

-- 
J?r?me Pouiller, Sysmic
Embedded Linux specialist
http://www.sysmic.fr