linux-kernel - Re: [PATCH bpf] samples: bpf: fix build error

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Message-ID: <0dd7c40b-c80b-9149-f022-d8113b77558a@fb.com>
Date:   Mon, 11 May 2020 13:32:05 -0700
From:   Yonghong Song <yhs@...com>
To:     Matteo Croce <mcroce@...hat.com>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Joe Stringer <joe@....org>, Jakub Kicinski <kuba@...nel.org>
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 <mcroce@...hat.com>

Acked-by: Yonghong Song <yhs@...com>