netdev - Re: expects argument of type 'size_t', but argument 5 has type 'Elf64

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Message-ID: <CAEf4BzZO_NnBSRe--V1GAu=ZeennVpZDOAzcE6e+0V=coVuXcw@mail.gmail.com>
Date:   Tue, 25 Aug 2020 20:18:21 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     bpf <bpf@...r.kernel.org>, Netdev <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>,
        Andrii Nakryiko <andriin@...com>, lkft-triage@...ts.linaro.org,
        Daniel Díaz <daniel.diaz@...aro.org>
Subject: Re: expects argument of type 'size_t', but argument 5 has type 'Elf64_Xword

On Mon, Aug 24, 2020 at 2:00 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> while building perf with gcc 7.3.0 on linux next this warning/error is found.
>
> In file included from libbpf.c:55:0:
> libbpf.c: In function 'bpf_object__elf_collect':
> libbpf_internal.h:74:22: error: format '%zu' expects argument of type
> 'size_t', but argument 5 has type 'Elf64_Xword {aka long long unsigned
> int}' [-Werror=format=]
>   libbpf_print(level, "libbpf: " fmt, ##__VA_ARGS__);
> cc1: all warnings being treated as errors
>

You left out the most useful part:

| libbpf.c:2826:4: note: in expansion of macro 'pr_info'
|     pr_info("elf: skipping section(%d) %s (size %zu)\n", idx, name,
sh.sh_size);
|     ^~~~~~~
| libbpf.c:2826:50: note: format string is defined here
|     pr_info("elf: skipping section(%d) %s (size %zu)\n", idx, name,
sh.sh_size);
|                                                 ~~^
|                                                 %llu

But I fixed it as part of [0], thanks.

  [0] https://patchwork.ozlabs.org/project/netdev/patch/20200826030922.2591203-1-andriin@fb.com/

> OE perf build long link,
> https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-next/DISTRO=lkft,MACHINE=am57xx-evm,label=docker-lkft/846/consoleText
>
> - Naresh