linux-kernel - Re: [Linux-6.11-rc4] perf BROKEN with LLVM/Clang 19.1.0-rc3

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Message-ID: <CA+icZUXpB4KMiRek3MkgCapwoW5TC31L4-TffrV=jdhM1k8=Sg@mail.gmail.com>
Date: Wed, 21 Aug 2024 21:37:19 +0200
From: Sedat Dilek <sedat.dilek@...il.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...hat.com>, Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Nathan Chancellor <nathan@...nel.org>
Subject: Re: [Linux-6.11-rc4] perf BROKEN with LLVM/Clang 19.1.0-rc3

As a workaround:

dileks@...za:~/src/linux/git$ git diff
diff --git a/tools/perf/util/setup.py b/tools/perf/util/setup.py
index 142e9d447ce7..db45e6fe7a21 100644
--- a/tools/perf/util/setup.py
+++ b/tools/perf/util/setup.py
@@ -63,6 +63,8 @@ cflags = getenv('CFLAGS', '').split()
cflags += ['-fno-strict-aliasing', '-Wno-write-strings',
'-Wno-unused-parameter', '-Wno-redundant-decls' ]
if cc_is_clang:
    cflags += ["-Wno-unused-command-line-argument" ]
+    cflags += ["-Wno-cast-function-type-mismatch" ]
+
else:
    cflags += ['-Wno-cast-function-type' ]

dileks@...za:~/src/linux/git$ ~/bin/perf -vv
perf version 6.11.0-rc4
                dwarf: [ on  ]  # HAVE_DWARF_SUPPORT
   dwarf_getlocations: [ on  ]  # HAVE_DWARF_GETLOCATIONS_SUPPORT
        syscall_table: [ on  ]  # HAVE_SYSCALL_TABLE_SUPPORT
               libbfd: [ OFF ]  # HAVE_LIBBFD_SUPPORT
           debuginfod: [ on  ]  # HAVE_DEBUGINFOD_SUPPORT
               libelf: [ on  ]  # HAVE_LIBELF_SUPPORT
              libnuma: [ on  ]  # HAVE_LIBNUMA_SUPPORT
numa_num_possible_cpus: [ on  ]  # HAVE_LIBNUMA_SUPPORT
              libperl: [ on  ]  # HAVE_LIBPERL_SUPPORT
            libpython: [ on  ]  # HAVE_LIBPYTHON_SUPPORT
             libslang: [ on  ]  # HAVE_SLANG_SUPPORT
            libcrypto: [ on  ]  # HAVE_LIBCRYPTO_SUPPORT
            libunwind: [ on  ]  # HAVE_LIBUNWIND_SUPPORT
   libdw-dwarf-unwind: [ on  ]  # HAVE_DWARF_SUPPORT
          libcapstone: [ on  ]  # HAVE_LIBCAPSTONE_SUPPORT
                 zlib: [ on  ]  # HAVE_ZLIB_SUPPORT
                 lzma: [ on  ]  # HAVE_LZMA_SUPPORT
            get_cpuid: [ on  ]  # HAVE_AUXTRACE_SUPPORT
                  bpf: [ on  ]  # HAVE_LIBBPF_SUPPORT
                  aio: [ on  ]  # HAVE_AIO_SUPPORT
                 zstd: [ on  ]  # HAVE_ZSTD_SUPPORT
              libpfm4: [ on  ]  # HAVE_LIBPFM
        libtraceevent: [ on  ]  # HAVE_LIBTRACEEVENT
        bpf_skeletons: [ on  ]  # HAVE_BPF_SKEL
 dwarf-unwind-support: [ on  ]  # HAVE_DWARF_UNWIND_SUPPORT
           libopencsd: [ OFF ]  # HAVE_CSTRACE_SUPPORT

-Sedat-