netdev - Re: [PATCH] bpfilter: fix build error

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Message-ID: <20180620143926.50720aec@elisabeth>
Date:   Wed, 20 Jun 2018 14:39:26 +0200
From:   Stefano Brivio <sbrivio@...hat.com>
To:     Matteo Croce <mcroce@...hat.com>
Cc:     netdev@...r.kernel.org, Alexei Starovoitov <ast@...com>
Subject: Re: [PATCH] bpfilter: fix build error

On Tue, 19 Jun 2018 17:16:20 +0200
Matteo Croce <mcroce@...hat.com> wrote:

> bpfilter Makefile assumes that the system locale is en_US, and the
> parsing of objdump output fails.
> Set LC_ALL=C and, while at it, rewrite the objdump parsing so it spawns
> only 2 processes instead of 7.
> 
> Fixes: d2ba09c17a064 ("net: add skeleton of bpfilter kernel module")
> Signed-off-by: Matteo Croce <mcroce@...hat.com>
> ---
>  net/bpfilter/Makefile | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
> index e0bbe7583e58..dd86b022eff0 100644
> --- a/net/bpfilter/Makefile
> +++ b/net/bpfilter/Makefile
> @@ -21,8 +21,10 @@ endif
>  # which bpfilter_kern.c passes further into umh blob loader at run-time
>  quiet_cmd_copy_umh = GEN $@
>        cmd_copy_umh = echo ':' > $(obj)/.bpfilter_umh.o.cmd; \
> -      $(OBJCOPY) -I binary -O `$(OBJDUMP) -f $<|grep format|cut -d' ' -f8` \
> -      -B `$(OBJDUMP) -f $<|grep architecture|cut -d, -f1|cut -d' ' -f2` \
> +      $(OBJCOPY) -I binary \
> +          `LC_ALL=C objdump -f net/bpfilter/bpfilter_umh \

Why do you use objdump instead of $(OBJDUMP) now? I guess this might
cause issues if you're cross-compiling.

-- 
Stefano