kernel/linux.git/tools/perf/Makefile.config, branch v6.18.21

perf build: Don't fail fast path feature detection when binutils-devel is not available

2025-11-13T20:16:34+00:00

This is one more remnant of the BUILD_NONDISTRO series to make building with binutils-devel opt-in due to license incompatibility. In this case just the references at link time were still in place, which make building the test-all.bin file fail, which wasn't detected before probably because the last test was done with binutils-devel available, doh. Now: $ rpm -q binutils-devel package binutils-devel is not installed $ file /tmp/build/perf-tools/feature/test-all.bin /tmp/build/perf-tools/feature/test-all.bin: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=4b5388a346b51f1b993f0b0dbd49f4570769b03c, for GNU/Linux 3.2.0, not stripped $ Fixes: 970ae86307718c34 ("perf build: The bfd features are opt-in, stop testing for them by default") Reviewed-by: Ian Rogers Cc: Adrian Hunter Cc: James Clark Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf build: Support build with clang

2025-10-06T19:49:25+00:00

Add support for building perf with clang. For cross compilation, the Makefile dynamically selects target flag for corresponding arch. This patch has been verified on x86_64 machine with Ubuntu distro, it can build successfully for native target, and for cross building Arm64 and s390. Example: native build on x86_64 / Ubuntu machine: $ HOSTCC=clang CC=clang CXX=clang++ make -C tools/perf Example: cross building s390 target on x86_64 / Ubuntu machine: # Install x390x cross toolchain and headers $ sudo apt-get install gcc-s390x-linux-gnu g++-s390x-linux-gnu \ libc6-dev-s390x-cross linux-libc-dev-s390x-cross # Build with clang $ HOSTCC=clang CC=clang CXX=clang++ \ ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- \ make -C tools/perf NO_LIBELF=1 NO_LIBTRACEEVENT=1 NO_LIBPYTHON=1 Signed-off-by: Leo Yan Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-8-4305590795b2@arm.com Cc: Palmer Dabbelt Cc: Albert Ou Cc: Alexandre Ghiti Cc: Nick Desaulniers Cc: Justin Stitt Cc: Bill Wendling Cc: Adrian Hunter Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: Nathan Chancellor Cc: James Clark Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf bpf-event: Use libbpf version rather than feature check

2025-10-03T19:49:51+00:00

The feature check guarded the -DHAVE_LIBBPF_STRINGS_SUPPORT is unnecessary as it is sufficient and easier to use the LIBBPF_CURRENT_VERSION_GEQ macro. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Blake Jones Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf build: Move libopcode disasm tests to BUILD_NONDISTRO

2025-10-03T19:49:51+00:00

The disasm feature tests feature-disassembler-four-args and feature-disassembler-init-styled link against libopcodes part of binutils which is license incompatible (GPLv3) with perf. Moving these tests out of the common config will help improve build time. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

tools build: Remove feature-libslang-include-subdir

2025-10-03T19:49:51+00:00

Added in commit cbefd24f0aee3a5d ("tools build: Add test to check if slang.h is in /usr/include/slang/") this feature was to fix build support on now unsupported versions of RHEL 5 and 6. As 6 years has passed let's remove the workaround. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf namespaces: Avoid get_current_dir_name dependency

2025-10-03T18:28:04+00:00

get_current_dir_name is a GNU extension not supported on, for example, Android. There is only one use of it so let's just switch to getcwd to avoid build and other complexity. Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf libbfd: Move libbfd functionality to its own file

2025-10-02T18:39:44+00:00

Move symbolization and srcline libbfd dependencies to a separate libbfd.c. This mirrors moving llvm and capstone code. While this code is deprecated as it is part of BUILD_NONDISTRO license incompatible code, moving the code to its own file minimizes disruption in the main files. disasm_bpf.c is moved to libbfd.c also except for symbol__disassemble_bpf_image which is currently more of a placeholder function rather than something that provides disassembly support. demangle-cxx.cpp code isn't migrated as it is very limited. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Andi Kleen Cc: Athira Rajeev Cc: Bill Wendling Cc: Charlie Jenkins Cc: Collin Funk Cc: Dmitriy Vyukov Cc: Dr. David Alan Gilbert Cc: Eric Biggers Cc: Haibo Xu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Justin Stitt Cc: Li Huafei Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Song Liu Cc: Stephen Brennan Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove libtracefs configuration

2025-10-02T12:42:59+00:00

libtracefs isn't used by perf but not having it installed causes build warnings. Given the library isn't used, there is no need for the configuration or warnings so remove. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20250929170600.59000-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Make libperl opt-in rather than opt-out, deprecate

2025-09-19T19:07:21+00:00

If libperl is installed then the perf tool build will build against it. There appears to be limited interest in the scripting support for perl so let's make it opt-in and deprecate it. With this patch applied you need to add LIBPERL=1 to get libperl support in perf - there is no warning if libperl is missing, but building will fail if libperl is missing and the build has LIBPERL=1. The perf version output is changed to: ``` $ perf version --build-options perf version 6.17.rc3.g8eca69269947 aio: [ on ] # HAVE_AIO_SUPPORT bpf: [ on ] # HAVE_LIBBPF_SUPPORT bpf_skeletons: [ on ] # HAVE_BPF_SKEL debuginfod: [ on ] # HAVE_DEBUGINFOD_SUPPORT dwarf: [ on ] # HAVE_LIBDW_SUPPORT dwarf_getlocations: [ on ] # HAVE_LIBDW_SUPPORT dwarf-unwind: [ on ] # HAVE_DWARF_UNWIND_SUPPORT auxtrace: [ on ] # HAVE_AUXTRACE_SUPPORT libbfd: [ OFF ] # HAVE_LIBBFD_SUPPORT ( tip: Deprecated, license incompatibility, use BUILD_NONDISTRO=1 and install binutils-dev[el] ) libbpf-strings: [ on ] # HAVE_LIBBPF_STRINGS_SUPPORT libcapstone: [ on ] # HAVE_LIBCAPSTONE_SUPPORT libdw-dwarf-unwind: [ on ] # HAVE_LIBDW_SUPPORT libelf: [ on ] # HAVE_LIBELF_SUPPORT libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT libopencsd: [ OFF ] # HAVE_CSTRACE_SUPPORT libperl: [ OFF ] # HAVE_LIBPERL_SUPPORT ( tip: Deprecated, use LIBPERL=1 and install libperl-dev to build with it ) libpfm4: [ on ] # HAVE_LIBPFM libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT libslang: [ on ] # HAVE_SLANG_SUPPORT libtraceevent: [ on ] # HAVE_LIBTRACEEVENT libunwind: [ OFF ] # HAVE_LIBUNWIND_SUPPORT ( tip: Deprecated, use LIBUNWIND=1 and install libunwind-dev[el] to build with it ) lzma: [ on ] # HAVE_LZMA_SUPPORT numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT zlib: [ on ] # HAVE_ZLIB_SUPPORT zstd: [ on ] # HAVE_ZSTD_SUPPORT ``` i.e. there is a tip saying about deprecation and how to get support back. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Charlie Jenkins Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Steven Rostedt (VMware) Cc: Tomas Glozar Cc: Yuzhuo Jing Link: https://lore.kernel.org/lkml/aMrk03gigBlGcYLK@x1/ Link: https://lore.kernel.org/lkml/CAP-5=fVX+bLBRJCiziDi_hBySgv2NFtDoghtpheSSxVAvvETGw@mail.gmail.com [ Keep the pre-existing perl-ExtUtils-Embed hint for Fedora/RHEL systems ] Signed-off-by: Arnaldo Carvalho de Melo

tools: Remove libcrypto dependency

2025-06-26T17:51:41+00:00

Remove all occurrence of libcrypto in the build system. Signed-off-by: Yuzhuo Jing Signed-off-by: Eric Biggers Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250625202311.23244-5-ebiggers@kernel.org Signed-off-by: Namhyung Kim