Changes in Makefile.feature

8a635c38 - tools/build: Add bpftool-skeletons feature test

Tue, 18 Feb 2025 14:58:53 +0000

tools/build: Add bpftool-skeletons feature testAdd bpftool-skeletons feature test, testing the presence of a bpftoolcapable of generating skeletons.This is to be used for tools that do not require building their ownbootstrap bpftool from the kernel source tree.Cc: John Kacur Cc: Luis Goncalves Cc: Gabriele Monaco Cc: Clark Williams Link: https://lore.kernel.org/20250218145859.27762-3-tglozar@redhat.comSigned-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/tools/build/Makefile.feature

d557814c - tools build: Add feature test for libelf with ZSTD

Sun, 15 Dec 2024 22:12:21 +0000

tools build: Add feature test for libelf with ZSTDThe macro ELFCOMPRESS_ZSTD defines the compress algorithm, which wasintroduced in the commit ("libelf: Document and make ELFCOMPRESS_ZSTDusable with old system elf.h") of the repository elfutils-0.188-67.Therefore, libelf 0.189 and later versions require to link the libzstdlibrary.Add a test for checking if libelf supports ZSTD algorithm. Pass themacro ELFCOMPRESS_ZSTD as an argument to the elf_compress() function.If the build succeeds, it means the feature is supported.Reviewed-by: Quentin Monnet Signed-off-by: Leo Yan Tested-by: Namhyung Kim Tested-by: Quentin Monnet Acked-by: Andrii Nakryiko Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Eduard Zingerman Cc: Guilherme Amadio Cc: Hao Luo Cc: Ian Rogers Cc: James Clark Cc: John Fastabend Cc: KP Singh Cc: Kan Liang Cc: Martin KaFai Lau Cc: Nick Terrell Cc: Song Liu Cc: Stanislav Fomichev Cc: Yonghong Song Link: https://lore.kernel.org/r/20241215221223.293205-2-leo.yan@arm.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

701b2740 - tools build feature: Don't set feature-libslang-include-subdir=1 if test-all.c builds

Fri, 13 Dec 2024 19:29:54 +0000

tools build feature: Don't set feature-libslang-include-subdir=1 if test-all.c buildsAs it is not really included in tools/build/feature/test-all.c, so anyquestioning about this feature should really try to buildtools/build/feature/test-libslang-include-subdir.c and not set it asdetected when test-all.c builds.Cc: Adrian Hunter Cc: Ian Rogers Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20241213195052.914914-2-acme@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

b1ef2559 - tools build feature: Don't set feature-libcap=1 if libcap-devel isn't available

Wed, 11 Dec 2024 19:51:08 +0000

tools build feature: Don't set feature-libcap=1 if libcap-devel isn't availablelibcap isn't tested in the tools/build/feature/test-all.c fast pathfeature detection process, so don't set it as available if test-allmanages to build.There are other users of this feature detection mechanism, and theyexplicitely ask for libcap to be tested, so are not affected by thispatch, for instance, with this patch in place: $ make -C tools/bpf/bpftool/ clean make: Leaving directory '/home/acme/git/perf-tools-next/tools/bpf/bpftool' ⬢ [acme@toolbox perf-tools-next]$ make -C tools/bpf/bpftool/ make: Entering directory '/home/acme/git/perf-tools-next/tools/bpf/bpftool' Auto-detecting system features: ... clang-bpf-co-re: [ on ] ... llvm: [ on ] ... libcap: [ on ] ... libbfd: [ on ] ... libelf-zstd: [ on ] LINK bpftool make: Leaving directory '/home/acme/git/perf-tools-next/tools/bpf/bpftool' $ $ sudo rpm -e libcap-devel $ make -C tools/bpf/bpftool/ make: Entering directory '/home/acme/git/perf-tools-next/tools/bpf/bpftool' Auto-detecting system features: ... clang-bpf-co-re: [ on ] ... llvm: [ on ] ... libcap: [ OFF ] ... libbfd: [ on ] ... libelf-zstd: [ on ] $Reviewed-by: Ian Rogers Acked-by: Quentin Monnet Cc: Adrian Hunter Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20241211224509.797827-3-acme@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

20ed5325 - tools build feature: Add some comments to explain the FEATURE_TESTS logic

Wed, 11 Dec 2024 19:30:02 +0000

tools build feature: Add some comments to explain the FEATURE_TESTS logicThe tools/build/feature/test-all.c works in conjunction with thetools/build/Makefile.feature FEATURE_TESTS_BASIC and FEATURE_TESTS_EXTRAcontents, so that if test-all.c manages to be built, we go on anditerate all entries in FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA settingthem to 1.To test this: $ rm -rf /tmp/b ; mkdir /tmp/b ; make -C tools/perf O=/tmp/b feature-dump $ cat /tmp/b/feature/test-all.make.output $ ldd /tmp/b/feature/test-all.bin linux-vdso.so.1 (0x00007f2a47a67000) libdw.so.1 => /lib64/libdw.so.1 (0x00007f2a477cf000) libpython3.12.so.1.0 => /lib64/libpython3.12.so.1.0 (0x00007f2a471fe000) libm.so.6 => /lib64/libm.so.6 (0x00007f2a4711a000) libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f2a470f2000) libtracefs.so.1 => /lib64/libtracefs.so.1 (0x00007f2a470cb000) libcrypto.so.3 => /lib64/libcrypto.so.3 (0x00007f2a46c1b000) libz.so.1 => /lib64/libz.so.1 (0x00007f2a46bf8000) libbabeltrace-ctf.so.1 => /lib64/libbabeltrace-ctf.so.1 (0x00007f2a46bad000) libcapstone.so.5 => /lib64/libcapstone.so.5 (0x00007f2a464b8000) libopencsd_c_api.so.1 => /lib64/libopencsd_c_api.so.1 (0x00007f2a464a8000) libopencsd.so.1 => /lib64/libopencsd.so.1 (0x00007f2a46422000) libelf.so.1 => /lib64/libelf.so.1 (0x00007f2a46406000) libnuma.so.1 => /lib64/libnuma.so.1 (0x00007f2a463f6000) libslang.so.2 => /lib64/libslang.so.2 (0x00007f2a46113000) libperl.so.5.38 => /lib64/libperl.so.5.38 (0x00007f2a45d74000) libc.so.6 => /lib64/libc.so.6 (0x00007f2a45b83000) liblzma.so.5 => /lib64/liblzma.so.5 (0x00007f2a45b50000) libzstd.so.1 => /lib64/libzstd.so.1 (0x00007f2a45a91000) libbz2.so.1 => /lib64/libbz2.so.1 (0x00007f2a45a7b000) /lib64/ld-linux-x86-64.so.2 (0x00007f2a47a69000) libbabeltrace.so.1 => /lib64/libbabeltrace.so.1 (0x00007f2a45a6b000) libpopt.so.0 => /lib64/libpopt.so.0 (0x00007f2a45a5b000) libuuid.so.1 => /lib64/libuuid.so.1 (0x00007f2a45a51000) libgmodule-2.0.so.0 => /lib64/libgmodule-2.0.so.0 (0x00007f2a45a4a000) libglib-2.0.so.0 => /lib64/libglib-2.0.so.0 (0x00007f2a458fa000) libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f2a45696000) libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f2a45668000) libcrypt.so.2 => /lib64/libcrypt.so.2 (0x00007f2a45630000) libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007f2a45590000) $ head /tmp/b/FEATURE-DUMP feature-backtrace=1 feature-libdw=1 feature-eventfd=1 feature-fortify-source=1 feature-get_current_dir_name=1 feature-gettid=1 feature-glibc=1 feature-libbfd=1 feature-libbfd-buildid=1 feature-libcap=1 $There are inconsistencies that are being audited, as can be seen abovewith the libcap case, that is not linked with test-all.bin nor ispresent in test-all.c, so shouldn't be set as present. Further patchesare going to address those inconsistencies, but lets document this a bitmore to reduce the chances of this happening again.Reviewed-by: Ian Rogers Cc: Adrian Hunter Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20241211224509.797827-2-acme@kernel.org[ Fixed typo pointed out by Ian Rogers ]Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

b40fbeb0 - tools build: Remove the libunwind feature tests from the ones detected when test-all.o builds

Wed, 11 Dec 2024 15:24:21 +0000

tools build: Remove the libunwind feature tests from the ones detected when test-all.o buildsWe have a tools/build/feature/test-all.c that has the most common set offeatures that perf uses and are expected to have its development filesavailable when building perf.When we made libwunwind opt-in we forgot to remove them from the list offeatures that are assumed to be available when test-all.c builds, removethem.Before this patch: $ rm -rf /tmp/b ; mkdir /tmp/b ; make -C tools/perf O=/tmp/b feature-dump ; grep feature-libunwind-aarch64= /tmp/b/FEATURE-DUMP feature-libunwind-aarch64=1 $Even tho this not being test built and those header files beingavailable: $ head -5 tools/build/feature/test-libunwind-aarch64.c // SPDX-License-Identifier: GPL-2.0 #include #include extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as, $After this patch: $ grep feature-libunwind- /tmp/b/FEATURE-DUMP $Now an audit on what is being enabled when test-all.c builds will beperformed.Fixes: 176c9d1e6a06f2fa ("tools features: Don't check for libunwind devel files by default")Cc: Adrian Hunter Cc: Ian Rogers Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

26385fd2 - perf build: Combine test-dwarf-getcfi into test-libdw

Thu, 17 Oct 2024 00:13:50 +0000

perf build: Combine test-dwarf-getcfi into test-libdwdwarf_getcfi support in libdw is 15 years old. Make libdw implydwarf_getcfi support and simplify build logic.Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Tested-by: Leo Yan Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241017001354.56973-8-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/build/Makefile.feature

23580d7b - perf build: Combine test-dwarf-getlocations into test-libdw

Thu, 17 Oct 2024 00:13:49 +0000

perf build: Combine test-dwarf-getlocations into test-libdwdwarf_getlocations support in libdw is more than 10 years old. Makelibdw imply dwarf_getlocations support and simplify build logic.Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Tested-by: Leo Yan Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241017001354.56973-7-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/build/Makefile.feature

3034b48a - perf build: Combine libdw-dwarf-unwind into libdw feature tests

Thu, 17 Oct 2024 00:13:48 +0000

perf build: Combine libdw-dwarf-unwind into libdw feature testsSupport in libdw has been present for 10 years so let's simplify thebuild logic with a single feature test.Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Tested-by: Leo Yan Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241017001354.56973-6-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/build/Makefile.feature

7c943261 - perf build: Rename test-dwarf to test-libdw

Thu, 17 Oct 2024 00:13:47 +0000

perf build: Rename test-dwarf to test-libdwBe more intention revealing that the dwarf test is actually testingfor libdw support.Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241017001354.56973-5-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/build/Makefile.feature

0f59a6c9 - tools/build: Add libcpupower dependency detection

Thu, 17 Oct 2024 14:09:09 +0000

tools/build: Add libcpupower dependency detectionAdd the ability to detect the presence of libcpupower on a system tothe Makefiles in tools/build.Link: https://lore.kernel.org/20241017140914.3200454-2-tglozar@redhat.comSigned-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/tools/build/Makefile.feature

332f60ac - perf build: Remove unused feature test target

Tue, 10 Sep 2024 14:04:01 +0000

perf build: Remove unused feature test targetllvm-version was removed in commit 56b11a2126bf ("perf bpf: Removesupport for embedding clang for compiling BPF events (-e foo.c)") butsome parts were left in the Makefile so finish removing them.Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Changbin Du Cc: Daniel Wagner Cc: Guilherme Amadio Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Justin Stitt Cc: Kan Liang Cc: Leo Yan Cc: Manu Bretelle Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Steinar H. Gunderson Link: https://lore.kernel.org/r/20240910140405.568791-2-james.clark@linaro.org[ Removed one leftover, 'llvm-version' from FEATURE_TESTS_EXTRA ]Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

206dcfca - perf build: Autodetect minimum required llvm-dev version

Tue, 10 Sep 2024 14:04:00 +0000

perf build: Autodetect minimum required llvm-dev versionThe new LLVM addr2line feature requires a minimum version of 13 tocompile. Add a feature check for the version so that NO_LLVM=1 doesn'tneed to be explicitly added. Leave the existing llvm feature checkintact because it's used by tools other than Perf.This fixes the following compilation error when the llvm-dev versiondoesn't match: util/llvm-c-helpers.cpp: In function 'char* llvm_name_for_code(dso*, const char*, u64)': util/llvm-c-helpers.cpp:178:21: error: 'std::remove_reference_t' {aka 'struct llvm::DILineInfo'} has no member named 'StartAddress' 178 | addr, res_or_err->StartAddress ? *res_or_err->StartAddress : 0);Fixes: c3f8644c21df9b7d ("perf report: Support LLVM for addr2line()")Signed-off-by: James Clark Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Changbin Du Cc: Guilherme Amadio Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Justin Stitt Cc: Kan Liang Cc: Leo Yan Cc: Manu Bretelle Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Steinar H. Gunderson Link: https://lore.kernel.org/r/20240910140405.568791-1-james.clark@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

c3f8644c - perf report: Support LLVM for addr2line()

Sat, 03 Aug 2024 15:20:06 +0000

perf report: Support LLVM for addr2line()In addition to the existing support for libbfd and calling out toan external addr2line command, add support for using libllvm directly.This is both faster than libbfd, and can be enabled in distro builds(the LLVM license has an explicit provision for GPLv2 compatibility).Thus, it is set as the primary choice if available.As an example, running 'perf report' on a medium-size profile withDWARF-based backtraces took 58 seconds with LLVM, 78 seconds withlibbfd, 153 seconds with external llvm-addr2line, and I got tired andaborted the test after waiting for 55 minutes with external bfdaddr2line (which is the default for perf as compiled by distributionstoday).Evidently, for this case, the bfd addr2line process needs 18 seconds (ona 5.2 GHz Zen 3) to load the .debug ELF in question, hits the 1-secondtimeout and gets killed during initialization, getting restarted anewevery time. Having an in-process addr2line makes this much more robust.As future extensions, libllvm can be used in many other places wherewe currently use libbfd or other libraries: - Symbol enumeration (in particular, for PE binaries). - Demangling (including non-Itanium demangling, e.g. Microsoft or Rust). - Disassembling (perf annotate).However, these are much less pressing; most people don't profile PEbinaries, and perf has non-bfd paths for ELF. The same with demangling;the default _cxa_demangle path works fine for most users, and while bfdobjdump can be slow on large binaries, it is possible to use--objdump=llvm-objdump to get the speed benefits. (It appearsLLVM-based demangling is very simple, should we want that.)Tested with LLVM 14, 15, 16, 18 and 19. For some reason, LLVM 12 was notcorrectly detected using feature_check, and thus was not tested.Committer notes: Added the name and a __maybe_unused to address: 1 13.50 almalinux:8 : FAIL gcc version 8.5.0 20210514 (Red Hat 8.5.0-22) (GCC) util/srcline.c: In function 'dso__free_a2l': util/srcline.c:184:20: error: parameter name omitted void dso__free_a2l(struct dso *) ^~~~~~~~~~~~ make[3]: *** [/git/perf-6.11.0-rc3/tools/build/Makefile.build:158: util] Error 2Signed-off-by: Steinar H. Gunderson Tested-by: Arnaldo Carvalho de Melo Cc: Ian Rogers Link: https://lore.kernel.org/r/20240803152008.2818485-1-sesse@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

8f61e98a - tools: Make pkg-config dependency checks usable by other tools

Wed, 17 Jul 2024 17:47:36 +0000

tools: Make pkg-config dependency checks usable by other toolsOther tools, in tools/verification and tools/tracing, make use oflibtraceevent and libtracefs as dependencies. This allows settingup the feature check flags for them as well.Signed-off-by: Guilherme Amadio Tested-by: Thorsten Leemhuis Tested-by: Leo Yan Acked-by: Steven Rostedt (Google) Cc: linux-trace-devel@vger.kernel.orgLink: https://lore.kernel.org/r/20240717174739.186988-3-amadio@gentoo.orgSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/build/Makefile.feature

8b767db3 - perf: build: introduce the libcapstone

Sat, 17 Feb 2024 07:40:42 +0000

perf: build: introduce the libcapstoneLater we will use libcapstone to disassemble instructions of samples.Signed-off-by: Changbin Du Reviewed-by: Adrian Hunter Cc: changbin.du@gmail.comCc: Thomas Richter Cc: Andi Kleen Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20240217074046.4100789-2-changbin.du@huawei.com List of files: /linux-6.15/tools/build/Makefile.feature

f67f2fda - perf build: Add feature check for dwarf_getcfi()

Thu, 09 Nov 2023 23:59:27 +0000

perf build: Add feature check for dwarf_getcfi()The dwarf_getcfi() is available on libdw 0.142+. Instead of justchecking the version number, it'd be nice to have a config item to checkthe feature at build time.Suggested-by: Masami Hiramatsu (Google) Signed-off-by: Namhyung Kim Acked-by: Masami Hiramatsu (Google) Cc: Adrian Hunter Cc: Andi Kleen Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: linux-toolchains@vger.kernel.orgCc: linux-trace-devel@vger.kernel.orgLink: https://lore.kernel.org/r/20231110000012.3538610-9-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

9e03608e - tools build: Add a feature test for scandirat(), that is not implemented so far in musl and uclibc

Tue, 04 Apr 2023 14:05:57 +0000

tools build: Add a feature test for scandirat(), that is not implemented so far in musl and uclibcWe use it just when listing tracepoint events, and for root, so justemit a warning about it to get users to ask the library maintainers toimplement it, as suggested in this systemd ticket: https://github.com/systemd/casync/issues/129Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/ZCwv4z5Dh%2FdHUMG6@kernel.org/Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

4c72e2b3 - tools build: Add feature test for abi::__cxa_demangle

Sat, 11 Mar 2023 06:57:48 +0000

tools build: Add feature test for abi::__cxa_demanglecxxabi.h is part of libsdtc++ and LLVM's libcxx, providingabi::__cxa_demangle a portable C++ demangler. Add a feature test todetect that the function is available.Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andres Freund Cc: Ingo Molnar Cc: Jiri Olsa Cc: Leo Yan Cc: Mark Rutland Cc: Martin Liška Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Pavithra Gurushankar Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Roberto Sassu Cc: Stephane Eranian Cc: Tiezhu Yang Cc: Tom Rix Cc: Yang Jihong Cc: llvm@lists.linux.devLink: https://lore.kernel.org/r/20230311065753.3012826-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature

f1bdebbb - perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available

Wed, 19 Oct 2022 12:44:17 +0000

perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is availableDuring the transition to libbpf 1.0 some functions that perf used weredeprecated and finally removed from libbpf, so bpf_program__set_insns()was introduced for perf to continue to use its bpf loader.But when build with LIBBPF_DYNAMIC=1 we now need to check if thatfunction is available so that perf can build with older libbpf versions,even if the end result is emitting a warning to the user that the useof the perf BPF loader requires a newer libbpf, since bpf_program__set_insns()touches libbpf objects internal state.This affects only 'perf trace' when using bpf C code or pre-compiledbytecode as an event.Noticed on RHEL9, that has libbpf 0.7.0, where bpf_program__set_insns()isn't available.Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/build/Makefile.feature