diff options
| author | Leo Yan <leo.yan@arm.com> | 2025-10-06 17:21:30 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2025-10-06 16:49:25 -0300 |
| commit | 4772e66cb45e0dd2c3c9ac649532756c523afd1e (patch) | |
| tree | 78e349535435701773f11a2e43e960a02a9159e4 /tools | |
| parent | 9ec46fc9380329de9dfd70de521e9da97cb4dfa8 (diff) | |
perf build: Support build with clang
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 <leo.yan@arm.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-8-4305590795b2@arm.com
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: linux-riscv@lists.infradead.org
Cc: llvm@lists.linux.dev
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Makefile.config | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 0f09f30f1906..5700516aa84a 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -23,8 +23,39 @@ HOSTCFLAGS := $(filter-out -Wnested-externs,$(EXTRA_WARNINGS)) # borrowed from kernel headers depends on it, e.g. put_unaligned_*(). CFLAGS += -fno-strict-aliasing -# Enabled Wthread-safety analysis for clang builds. +# Set target flag and options when using clang as compiler. ifeq ($(CC_NO_CLANG), 0) + CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi + CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu + CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu + CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu + CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu + CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu + CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu + CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu + CLANG_TARGET_FLAGS_x86_64 := x86_64-linux-gnu + + # Default to host architecture if ARCH is not explicitly given. + ifeq ($(ARCH), $(HOSTARCH)) + CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple) + else + CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH)) + endif + + ifeq ($(CROSS_COMPILE),) + ifeq ($(CLANG_TARGET_FLAGS),) + $(error Specify CROSS_COMPILE or add CLANG_TARGET_FLAGS for $(ARCH)) + else + CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) + endif # CLANG_TARGET_FLAGS + else + CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) + endif # CROSS_COMPILE + + CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as + CXX := $(CXX) $(CLANG_FLAGS) -fintegrated-as + + # Enabled Wthread-safety analysis for clang builds. CFLAGS += -Wthread-safety endif |