Em Sun, Jul 31, 2022 at 06:38:26PM -0700, Andres Freund escreveu:
> 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?
I think its ok
> WRT the feature test: Not sure what the point of the -DPACKAGE='"perf"' is,
I think its related to libbfd, and it comes from a long time ago, trying
to find the cset adding that...
> 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
Cool, thanks, I'll process the first 4 patches, then at some point the
bpftool bits can be merged, alternatively I can process those as well if
the bpftool maintainers are ok with it.
I'll just wait a bit to see if Jiri and others have something to say.
- Arnaldo
> - included a bit more information about tests I did in commit messages
> - add a maybe_unused to fprintf_json_styled's style argument
>
> V3:
> - don't include dis-asm-compat.h when building without libbfd
> (Ben Hutchings)
> - don't include compiler.h in dis-asm-compat.h, use (void) casts instead,
> to avoid compiler.h include due to potential licensing conflict
> - dual-license dis-asm-compat.h, for better compatibility with the rest of
> bpftool's code (suggested by Quentin Monnet)
> - don't display feature-disassembler-init-styled test
> (suggested by Jiri Olsa)
> - don't display feature-disassembler-four-args test, I split this for the
> different subsystems, but maybe that's overkill? (suggested by Jiri Olsa)
>
> Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Sedat Dilek <sedat.dilek@xxxxxxxxx>
> Cc: Quentin Monnet <quentin@xxxxxxxxxxxxx>
> CC: Ben Hutchings <benh@xxxxxxxxxx>
> Cc: bpf@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Link: https://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@xxxxxxxxxxxxxxxxx
> Link: https://lore.kernel.org/lkml/CA+icZUVpr8ZeOKCj4zMMqbFT013KJz2T1csvXg+VSkdvJH1Ubw@xxxxxxxxxxxxxx
>
> Andres Freund (8):
> tools build: Add feature test for init_disassemble_info API changes
> tools build: Don't display disassembler-four-args feature test
> 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 bpf_jit_disasm: Don't display disassembler-four-args feature
> test
> tools bpftool: Fix compilation error with new binutils
> tools bpftool: Don't display disassembler-four-args feature test
>
> tools/bpf/Makefile | 7 ++-
> tools/bpf/bpf_jit_disasm.c | 5 +-
> tools/bpf/bpftool/Makefile | 8 ++-
> 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 | 55 +++++++++++++++++++
> tools/perf/Makefile.config | 8 +++
> tools/perf/util/annotate.c | 7 ++-
> 11 files changed, 138 insertions(+), 19 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
--
- Arnaldo
