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Date:   Tue, 6 Dec 2022 14:07:32 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Ian Rogers <irogers@google.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
        bpf@vger.kernel.org, Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 2/3] perf build: Use libtraceevent from the system
Message-ID: <Y4921D+36UGdhK92@kernel.org>
References: <20221205225940.3079667-1-irogers@google.com>
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 <Y49qiCIiyaehEOaG@kernel.org>
 <Y49rvLO2RnJBBNL/@kernel.org>
 <Y49skYa5VYPMU+RF@kernel.org>
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 <Y49wxSIK7dJ7iTDg@kernel.org>
 <Y491d1wEW4TfUi5f@kernel.org>
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Em Tue, Dec 06, 2022 at 02:01:43PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Dec 06, 2022 at 01:41:41PM -0300, Arnaldo Carvalho de Melo escreveu:
> >  Now to look at the BUILD_BPF_SKEL=1 kaboom:
> > 
> >  [acme@quaco perf]$ alias m
> > alias m='rm -rf ~/libexec/perf-core/ ; make -k NO_LIBTRACEEVENT=1 BUILD_BPF_SKEL=1 O=/tmp/build/perf -C tools/perf install-bin && perf test python'
> > [acme@quaco perf]$ m
> > make: Entering directory '/home/acme/git/perf/tools/perf'
> >   BUILD:   Doing 'make -j8' parallel build
> >   <SNIP>
> > /usr/bin/ld: /tmp/build/perf/perf-in.o: in function `add_work':
> > /home/acme/git/perf/tools/perf/util/bpf_kwork.c:285: undefined reference to `perf_kwork_add_work'
> > /usr/bin/ld: /tmp/build/perf/perf-in.o: in function `lock_contention_read':

For that bpf_kwork.c see below. Now to see why the python binding is not
building, I guess is unrelated and you have some other outstanding
patch?

[acme@quaco perf]$ git diff
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 255bc751d19452f2..c97093f47c990b45 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -153,8 +153,12 @@ perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter_cgroup.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_ftrace.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_off_cpu.o
-perf-$(CONFIG_PERF_BPF_SKEL) += bpf_kwork.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_lock_contention.o
+
+ifeq ($(CONFIG_TRACEEVENT),y)
+  perf-$(CONFIG_PERF_BPF_SKEL) += bpf_kwork.o
+endif
+
 perf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
 perf-$(CONFIG_LIBELF) += symbol-elf.o
 perf-$(CONFIG_LIBELF) += probe-file.o
[acme@quaco perf]$ m
make: Entering directory '/home/acme/git/perf/tools/perf'
  BUILD:   Doing 'make -j8' parallel build
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/msr-index.h' differs from latest version at 'arch/x86/include/asm/msr-index.h'
diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h
Warning: Kernel ABI header at 'tools/arch/arm64/include/uapi/asm/perf_regs.h' differs from latest version at 'arch/arm64/include/uapi/asm/perf_regs.h'
diff -u tools/arch/arm64/include/uapi/asm/perf_regs.h arch/arm64/include/uapi/asm/perf_regs.h
Warning: Kernel ABI header at 'tools/arch/arm64/include/asm/cputype.h' differs from latest version at 'arch/arm64/include/asm/cputype.h'
diff -u tools/arch/arm64/include/asm/cputype.h arch/arm64/include/asm/cputype.h
Warning: Kernel ABI header at 'tools/perf/arch/powerpc/entry/syscalls/syscall.tbl' differs from latest version at 'arch/powerpc/kernel/syscalls/syscall.tbl'
diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
Makefile.config:1138: No openjdk development package found, please install JDK package, e.g. openjdk-8-jdk, java-1.8.0-openjdk-devel

  INSTALL libsubcmd_headers
  INSTALL libapi_headers
  INSTALL libsymbol_headers
  INSTALL libperf_headers
  GEN     /tmp/build/perf/python/perf.so
  INSTALL libbpf_headers
  INSTALL binaries
  INSTALL tests
  INSTALL perf-read-vdso32
  INSTALL libexec
  INSTALL bpf-examples
  INSTALL perf-archive
  INSTALL perf-iostat
  INSTALL strace/groups
  INSTALL perl-scripts
  INSTALL python-scripts
  INSTALL dlfilters
  INSTALL perf_completion-script
  INSTALL perf-tip
make: Leaving directory '/home/acme/git/perf/tools/perf'
 14: 'import perf' in python                                         : FAILED!
[acme@quaco perf]$