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Date:   Mon, 11 May 2020 13:32:05 -0700
From:   Yonghong Song <>
To:     Matteo Croce <>, <>,
CC:     <>,
        Alexei Starovoitov <>,
        Joe Stringer <>, Jakub Kicinski <>
Subject: Re: [PATCH bpf] samples: bpf: fix build error

On 5/11/20 4:32 AM, Matteo Croce wrote:
> GCC 10 is very strict about symbol clash, and lwt_len_hist_user contains
> a symbol which clashes with libbpf:
> /usr/bin/ld: samples/bpf/lwt_len_hist_user.o:(.bss+0x0): multiple definition of `bpf_log_buf'; samples/bpf/bpf_load.o:(.bss+0x8c0): first defined here
> collect2: error: ld returned 1 exit status
> bpf_log_buf here seems to be a leftover, so removing it.
> Signed-off-by: Matteo Croce <>

Acked-by: Yonghong Song <>

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