linux-kernel - Re: [PATCH v2 0/5] tools: fix compilation failure caused by init_disassemble

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Message-ID: <CA+icZUVDzogiyG=8sCuxdW4aaby_kRwToit2tg-A4D3VorVKnA@mail.gmail.com>
Date:   Thu, 14 Jul 2022 11:16:54 +0200
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Andres Freund <andres@...razel.de>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Quentin Monnet <quentin@...valent.com>,
        Ben Hutchings <ben@...adent.org.uk>
Subject: Re: [PATCH v2 0/5] tools: fix compilation failure caused by
 init_disassemble_info API changes

On Sun, Jul 3, 2022 at 11:25 PM Andres Freund <andres@...razel.de> wrote:
>
> binutils changed the signature of init_disassemble_info(), which now causes
> compilation failures for tools/{perf,bpf} on e.g. debian unstable. Relevant
> binutils commit:
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07
>
> I first fixed this without introducing the compat header, as suggested by
> Quentin, but I thought the amount of repeated boilerplate was a bit too
> much. So instead I introduced a compat header to wrap the API changes. Even
> tools/bpf/bpftool/jit_disasm.c, which needs its own callbacks for json, imo
> looks nicer this way.
>
> I'm not regular contributor, so it very well might be my procedures are a
> bit off...
>
> I am not sure I added the right [number of] people to CC?
>
> WRT the feature test: Not sure what the point of the -DPACKAGE='"perf"' is,
> nor why tools/perf/Makefile.config sets some LDFLAGS/CFLAGS that are also
> in feature/Makefile and why -ldl isn't needed in the other places. But...
>
> V2:
> - split patches further, so that tools/bpf and tools/perf part are entirely
>   separate
> - included a bit more information about tests I did in commit messages
> - add a maybe_unused to fprintf_json_styled's style argument
>

[ CC Ben ]

The Debian kernel-team has integrated your patchset v2.

In case you build without libbfd support there is [1].
So, feel free to take this for v3.

-Sedat-

[1] https://salsa.debian.org/kernel-team/linux/-/blob/sid/debian/patches/bugfix/all/tools-perf-fix-build-without-libbfd.patch

> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Sedat Dilek <sedat.dilek@...il.com>
> Cc: Quentin Monnet <quentin@...valent.com>
> To: bpf@...r.kernel.org
> To: linux-kernel@...r.kernel.org
> Link: https://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
> Link: https://lore.kernel.org/lkml/CA+icZUVpr8ZeOKCj4zMMqbFT013KJz2T1csvXg+VSkdvJH1Ubw@mail.gmail.com
>
> Andres Freund (5):
>   tools build: add feature test for init_disassemble_info API changes
>   tools include: add dis-asm-compat.h to handle version differences
>   tools perf: Fix compilation error with new binutils
>   tools bpf_jit_disasm: Fix compilation error with new binutils
>   tools bpftool: Fix compilation error with new binutils
>
>  tools/bpf/Makefile                            |  7 ++-
>  tools/bpf/bpf_jit_disasm.c                    |  5 +-
>  tools/bpf/bpftool/Makefile                    |  7 ++-
>  tools/bpf/bpftool/jit_disasm.c                | 42 ++++++++++++---
>  tools/build/Makefile.feature                  |  4 +-
>  tools/build/feature/Makefile                  |  4 ++
>  tools/build/feature/test-all.c                |  4 ++
>  .../feature/test-disassembler-init-styled.c   | 13 +++++
>  tools/include/tools/dis-asm-compat.h          | 53 +++++++++++++++++++
>  tools/perf/Makefile.config                    |  8 +++
>  tools/perf/util/annotate.c                    |  7 +--
>  11 files changed, 137 insertions(+), 17 deletions(-)
>  create mode 100644 tools/build/feature/test-disassembler-init-styled.c
>  create mode 100644 tools/include/tools/dis-asm-compat.h
>
> --
> 2.37.0.3.g30cc8d0f14
>