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References: <20191009204134.26960-1-ivan.khoronzhuk@linaro.org> <20191009204134.26960-2-ivan.khoronzhuk@linaro.org>
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From:   Andrii Nakryiko <andrii.nakryiko@gmail.com>
Date:   Wed, 9 Oct 2019 15:42:07 -0700
Message-ID: <CAEf4BzZLL=mL1nnyQ2tgGzLnaLBm+rzBOGrBp=KeiLzbo3Zcmw@mail.gmail.com>
Subject: Re: [PATCH v4 bpf-next 01/15] samples/bpf: fix HDR_PROBE "echo"
To:     Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Cc:     Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Yonghong Song <yhs@fb.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <jakub.kicinski@netronome.com>,
        Jesper Dangaard Brouer <hawk@kernel.org>,
        john fastabend <john.fastabend@gmail.com>,
        open list <linux-kernel@vger.kernel.org>,
        Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
        clang-built-linux@googlegroups.com, ilias.apalodimas@linaro.org,
        sergei.shtylyov@cogentembedded.com
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On Wed, Oct 9, 2019 at 1:45 PM Ivan Khoronzhuk
<ivan.khoronzhuk@linaro.org> wrote:
>
> echo should be replaced with echo -e to handle '\n' correctly, but
> instead, replace it with printf as some systems can't handle echo -e.
>
> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
> ---

Acked-by: Andrii Nakryiko <andriin@fb.com>

>  samples/bpf/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> index a11d7270583d..4f61725b1d86 100644
> --- a/samples/bpf/Makefile
> +++ b/samples/bpf/Makefile
> @@ -201,7 +201,7 @@ endif
>
>  # Don't evaluate probes and warnings if we need to run make recursively
>  ifneq ($(src),)
> -HDR_PROBE := $(shell echo "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
> +HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
>         $(HOSTCC) $(KBUILD_HOSTCFLAGS) -x c - -o /dev/null 2>/dev/null && \
>         echo okay)
>
> --
> 2.17.1
>