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| author | hupu <hupu.gm@gmail.com> | 2025-12-23 16:43:34 +0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2026-02-12 17:45:22 -0300 |
| commit | 9eb1760f846a38ea4ef1e5e177a2a0415e34c267 (patch) | |
| tree | e56a8f95f86ffda43d3dad28ec036ec508575b56 | |
| parent | adc1284bae3cfd25df785d55b900a8778ad79366 (diff) | |
perf build: Allow passing extra Clang flags via EXTRA_BPF_FLAGS
Add support for EXTRA_BPF_FLAGS in the eBPF skeleton build, allowing
users to pass additional clang options such as --sysroot or custom
include paths when cross-compiling perf.
This is primarily intended for cross-build scenarios where the default
host include paths do not match the target kernel version.
Example usage:
make perf ARCH="arm64" EXTRA_BPF_FLAGS="--sysroot=..."
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: hupu <hupu.gm@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/Makefile.perf | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index a6d8ca3e9233..11b63bafdb23 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -35,6 +35,9 @@ include ../scripts/utilities.mak # # Define EXTRA_CFLAGS=-m64 or EXTRA_CFLAGS=-m32 as appropriate for cross-builds. # +# Define EXTRA_BPF_FLAGS="--sysroot=<path>" or other custom include paths for +# cross-compiling BPF skeletons +# # Define EXCLUDE_EXTLIBS=-lmylib to exclude libmylib from the auto-generated # EXTLIBS. # @@ -1244,7 +1247,7 @@ endif $(SKEL_TMP_OUT)/%.bpf.o: $(OUTPUT)PERF-VERSION-FILE util/bpf_skel/perf_version.h | $(SKEL_TMP_OUT) $(SKEL_TMP_OUT)/%.bpf.o: util/bpf_skel/%.bpf.c $(LIBBPF) $(SKEL_OUT)/vmlinux.h $(QUIET_CLANG)$(CLANG) -g -O2 -fno-stack-protector --target=bpf \ - $(CLANG_OPTIONS) $(BPF_INCLUDE) $(TOOLS_UAPI_INCLUDE) \ + $(CLANG_OPTIONS) $(EXTRA_BPF_FLAGS) $(BPF_INCLUDE) $(TOOLS_UAPI_INCLUDE) \ -include $(OUTPUT)PERF-VERSION-FILE -include util/bpf_skel/perf_version.h \ -c $(filter util/bpf_skel/%.bpf.c,$^) -o $@ |