linux-kernel - Re: [PATCH bpf-next] samples: bpf: Suppress readelf stderr when probing for BTF support

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Date:   Tue, 2 Nov 2021 19:30:40 -0700
From:   Yonghong Song <yhs@...com>
To:     Pu Lehui <pulehui@...wei.com>, <ast@...nel.org>,
        <daniel@...earbox.net>, <andrii@...nel.org>, <kafai@...com>,
        <songliubraving@...com>, <john.fastabend@...il.com>,
        <kpsingh@...nel.org>, <nathan@...nel.org>,
        <ndesaulniers@...gle.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <llvm@...ts.linux.dev>
Subject: Re: [PATCH bpf-next] samples: bpf: Suppress readelf stderr when
 probing for BTF support



On 10/21/21 5:39 AM, Pu Lehui wrote:
> When compiling bpf samples, the following warning appears:
> 
> readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF
> sections of machine number 247
> readelf: Warning: unable to apply unsupported reloc type 10 to section
> .debug_info
> readelf: Warning: unable to apply unsupported reloc type 1 to section
> .debug_info
> readelf: Warning: unable to apply unsupported reloc type 10 to section
> .debug_info
> 
> Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf:
> suppress readelf stderr when probing for BTF support"), let's use
> readelf that supports btf.
> 
> Signed-off-by: Pu Lehui <pulehui@...wei.com>

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