Re: [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format

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On Mon, May 06, 2013 at 05:42:55PM +0900, Kyungsik Lee wrote:
> LZ4 has been updated with LZ4 Streaming Format specification(v1.3).
> lz4demo is replaced by lz4c. lz4c supports both the new streaming and
> legacy format with -l option.
> 
> This patch makes use of lz4c to support legacy format which is
> used for LZ4 De/compression in the linux kernel.
> 
> Link: https://code.google.com/p/lz4/source/checkout
> Signed-off-by: Kyungsik Lee <kyungsik.lee@xxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Florian Fainelli <florian@xxxxxxxxxxx>
> Cc: Yann Collet <yann.collet.73@xxxxxxxxx>
> Cc: Chanho Min <chanho.min@xxxxxxx>
> ---
>  scripts/Makefile.lib | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index a0ab6d7..c9bfbb0 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -313,7 +313,7 @@ cmd_lzo = (cat $(filter-out FORCE,$^) | \
>  
>  quiet_cmd_lz4 = LZ4     $@
>  cmd_lz4 = (cat $(filter-out FORCE,$^) | \
> -	lz4demo -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
> +	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \

You probably want to check for the presence of lz4c on the system and
bail with an informative message if absent.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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