linux-kernel - [PATCH v1 0/3] tools: fix compilation failure caused by init_disassemble

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Date:   Sat,  2 Jul 2022 21:48:10 -0700
From:   Andres Freund <andres@...razel.de>
To:     linux-kernel@...r.kernel.org
Cc:     Quentin Monnet <quentin@...valent.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>
Subject: [PATCH v1 0/3] tools: fix compilation failure caused by init_disassemble_info API changes

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 wasn't sure whether the split of the commits conforms with the kernel
habits should the changes to tools/bpf and tools/perf be split into
separate commits?

Nor was I sure if I 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...

Andres Freund (3):
  tools build: add feature test for init_disassemble_info API changes
  tools: add dis-asm-compat.h to centralize handling of version
    differences
  tools: Use tools/dis-asm-compat.h to fix compilation errors with new
    binutils

To: bpf@...r.kernel.org
To: linux-kernel@...r.kernel.org
Cc: Quentin Monnet <quentin@...valent.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>

 tools/bpf/Makefile                            |  7 ++-
 tools/bpf/bpf_jit_disasm.c                    |  5 +-
 tools/bpf/bpftool/Makefile                    |  7 ++-
 tools/bpf/bpftool/jit_disasm.c                | 40 +++++++++++---
 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, 135 insertions(+), 17 deletions(-)
 create mode 100644 tools/build/feature/test-disassembler-init-styled.c
 create mode 100644 tools/include/tools/dis-asm-compat.h

-- 
2.35.1.677.gabf474a5dd