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

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Date:   Thu, 14 Jul 2022 15:25:44 +0200
From:   Ben Hutchings <ben@...adent.org.uk>
To:     sedat.dilek@...il.com, 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>
Subject: Re: [PATCH v2 0/5] tools: fix compilation failure caused by
 init_disassemble_info API changes

On Thu, 2022-07-14 at 11:16 +0200, Sedat Dilek wrote:
> 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
[...]

Thanks, I meant to send that fix upstream but got distracted.  It
should really be folded into "tools perf: Fix compilation error with
new binutils".

Ben.
> 

-- 
Ben Hutchings
Always try to do things in chronological order;
it's less confusing that way.

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