linux-stable/tools/perf
Arnaldo Carvalho de Melo b26ba87087 tools build: Filter out options and warnings not supported by clang
commit 41caff459a upstream.

These make the feature check fail when using clang, so remove them just
like is done in tools/perf/Makefile.config to build perf itself.

Adding -Wno-compound-token-split-by-macro to tools/perf/Makefile.config
when building with clang is also necessary to avoid these warnings
turned into errors (-Werror):

    CC      /tmp/build/perf/util/scripting-engines/trace-event-perl.o
  In file included from util/scripting-engines/trace-event-perl.c:35:
  In file included from /usr/lib64/perl5/CORE/perl.h:4085:
  In file included from /usr/lib64/perl5/CORE/hv.h:659:
  In file included from /usr/lib64/perl5/CORE/hv_func.h:34:
  In file included from /usr/lib64/perl5/CORE/sbox32_hash.h:4:
  /usr/lib64/perl5/CORE/zaphod32_hash.h:150:5: error: '(' and '{' tokens introducing statement expression appear in different macro expansion contexts [-Werror,-Wcompound-token-split-by-macro]
      ZAPHOD32_SCRAMBLE32(state[0],0x9fade23b);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/lib64/perl5/CORE/zaphod32_hash.h:80:38: note: expanded from macro 'ZAPHOD32_SCRAMBLE32'
  #define ZAPHOD32_SCRAMBLE32(v,prime) STMT_START {  \
                                       ^~~~~~~~~~
  /usr/lib64/perl5/CORE/perl.h:737:29: note: expanded from macro 'STMT_START'
  #   define STMT_START   (void)( /* gcc supports "({ STATEMENTS; })" */
                                ^
  /usr/lib64/perl5/CORE/zaphod32_hash.h:150:5: note: '{' token is here
      ZAPHOD32_SCRAMBLE32(state[0],0x9fade23b);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/lib64/perl5/CORE/zaphod32_hash.h:80:49: note: expanded from macro 'ZAPHOD32_SCRAMBLE32'
  #define ZAPHOD32_SCRAMBLE32(v,prime) STMT_START {  \
                                                  ^
  /usr/lib64/perl5/CORE/zaphod32_hash.h:150:5: error: '}' and ')' tokens terminating statement expression appear in different macro expansion contexts [-Werror,-Wcompound-token-split-by-macro]
      ZAPHOD32_SCRAMBLE32(state[0],0x9fade23b);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/lib64/perl5/CORE/zaphod32_hash.h:87:41: note: expanded from macro 'ZAPHOD32_SCRAMBLE32'
      v ^= (v>>23);                       \
                                          ^
  /usr/lib64/perl5/CORE/zaphod32_hash.h:150:5: note: ')' token is here
      ZAPHOD32_SCRAMBLE32(state[0],0x9fade23b);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/lib64/perl5/CORE/zaphod32_hash.h:88:3: note: expanded from macro 'ZAPHOD32_SCRAMBLE32'
  } STMT_END
    ^~~~~~~~
  /usr/lib64/perl5/CORE/perl.h:738:21: note: expanded from macro 'STMT_END'
  #   define STMT_END     )
                          ^

Please refer to the discussion on the Link: tag below, where Nathan
clarifies the situation:

<quote>
acme> And then get to the problems at the end of this message, which seem
acme> similar to the problem described here:
acme>
acme> From  Nathan Chancellor <>
acme> Subject	[PATCH] mwifiex: Remove unnecessary braces from HostCmd_SET_SEQ_NO_BSS_INFO
acme>
acme> https://lkml.org/lkml/2020/9/1/135
acme>
acme> So perhaps in this case its better to disable that
acme> -Werror,-Wcompound-token-split-by-macro when building with clang?

Yes, I think that is probably the best solution. As far as I can tell,
at least in this file and context, the warning appears harmless, as the
"create a GNU C statement expression from two different macros" is very
much intentional, based on the presence of PERL_USE_GCC_BRACE_GROUPS.
The warning is fixed in upstream Perl by just avoiding creating GNU C
statement expressions using STMT_START and STMT_END:

  https://github.com/Perl/perl5/issues/18780
  https://github.com/Perl/perl5/pull/18984

If I am reading the source code correctly, an alternative to disabling
the warning would be specifying -DPERL_GCC_BRACE_GROUPS_FORBIDDEN but it
seems like that might end up impacting more than just this site,
according to the issue discussion above.
</quote>

Based-on-a-patch-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # Debian/Selfmade LLVM-14 (x86-64)
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Keeping <john@metanate.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Link: http://lore.kernel.org/lkml/YkxWcYzph5pC1EK8@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-13 19:27:41 +02:00
..
arch perf: arm-spe: Fix perf report --mem-mode 2022-04-13 19:27:34 +02:00
bench perf bench: Fix NULL check against wrong variable 2022-03-12 10:49:13 -03:00
dlfilters perf dlfilter: Drop unused variable 2021-12-16 12:18:11 -03:00
Documentation perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
examples/bpf
include perf build: Move perf_dlfilters.h in the source tree 2021-08-11 09:35:24 -03:00
jvmti
pmu-events perf vendor events: Update metrics for SkyLake Server 2022-04-08 13:59:02 +02:00
python
scripts perf scripts python: intel-pt-events.py: Fix printing of switch events 2021-12-28 17:26:25 -03:00
tests perf unwind: Don't show unwind error messages when augmenting frame pointer stack 2022-04-13 19:27:34 +02:00
trace perf beauty: Make the prctl arg regexp more strict to cope with PR_SET_VMA 2022-02-01 13:03:27 -03:00
ui perf annotate: Avoid TUI crash when navigating in the annotation of recursive functions 2022-01-10 15:47:30 -03:00
util perf python: Fix probing for some clang command line options 2022-04-13 19:27:41 +02:00
.gitignore Add 'tools/perf/libbpf/' to ignored files 2021-11-08 11:33:35 -08:00
Build
builtin-annotate.c perf tools: Check vmlinux/kallsyms arguments in all tools 2021-11-07 12:27:38 -03:00
builtin-bench.c perf bench: Use unbuffered output when pipe/tee'ing to a file 2021-12-16 12:18:11 -03:00
builtin-buildid-cache.c perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
builtin-buildid-list.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-c2c.c perf cpumap: Give CPUs their own type 2022-01-12 14:28:23 -03:00
builtin-config.c
builtin-daemon.c perf daemon: Remove duplicate sys/file.h include 2021-10-08 15:14:50 -03:00
builtin-data.c perf data: Correct -h output 2021-08-31 15:12:00 -03:00
builtin-diff.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-evlist.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-ftrace.c perf ftrace: system_wide collection is not effective by default 2022-02-06 09:19:51 -03:00
builtin-help.c
builtin-inject.c perf tools: Remove redundant err variable 2022-01-22 17:25:02 -03:00
builtin-kallsyms.c
builtin-kmem.c perf cpumap: Give CPUs their own type 2022-01-12 14:28:23 -03:00
builtin-kvm.c perf tools: Allow controlling synthesizing PERF_RECORD_ metadata events during record 2021-09-17 08:44:19 -03:00
builtin-list.c perf list: Display hybrid PMU events with cpu type 2021-10-25 13:47:42 -03:00
builtin-lock.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-mem.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-probe.c perf tools: Check vmlinux/kallsyms arguments in all tools 2021-11-07 12:27:38 -03:00
builtin-record.c perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
builtin-report.c perf callchain: Enable dwarf_callchain_users on arm64 2021-12-21 18:35:44 -03:00
builtin-sched.c perf cpumap: Give CPUs their own type 2022-01-12 14:28:23 -03:00
builtin-script.c perf script: Fix error when printing 'weight' field 2022-02-22 21:17:55 -03:00
builtin-stat.c perf stat: Fix forked applications enablement of counters 2022-04-08 13:58:32 +02:00
builtin-timechart.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-top.c perf tools: Check vmlinux/kallsyms arguments in all tools 2021-11-07 12:27:38 -03:00
builtin-trace.c perf trace: Avoid early exit due SIGCHLD from non-workload processes 2022-02-16 13:47:12 -03:00
builtin-version.c
builtin.h
check-headers.sh tools lib: Adopt list_sort() from the kernel sources 2021-10-20 10:30:59 -03:00
command-list.txt
CREDITS
design.txt perf design.txt: Synchronize the definition of enum perf_hw_id with code 2021-11-13 18:11:50 -03:00
Makefile
Makefile.config tools build: Filter out options and warnings not supported by clang 2022-04-13 19:27:41 +02:00
Makefile.perf perf ftrace: Add -b/--use-bpf option for latency subcommand 2021-12-16 12:18:12 -03:00
MANIFEST perf MANIFEST: Add bpftool files to allow building with BUILD_BPF_SKEL=1 2021-11-07 15:39:28 -03:00
perf-archive.sh
perf-completion.sh
perf-iostat.sh
perf-read-vdso.c
perf-sys.h
perf-with-kcore.sh
perf.c perf tools: Fix perf's libperf_print callback 2022-04-13 19:27:34 +02:00
perf.h