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linux/tools/lib/perf/Makefile
Ian Rogers 8c5b40678c libperf build: Always place libperf includes first 
When building tools/perf the CFLAGS can contain a directory for the
installed headers.

As the headers may be being installed while building libperf.a this can
cause headers to be partially installed and found in the include path
while building an object file for libperf.a.

The installed header may reference other installed headers that are
missing given the partial nature of the install and then the build fails
with a missing header file.

Avoid this by ensuring the libperf source headers are always first in
the CFLAGS.

Fixes: 3143504918 ("libperf: Make libperf.a part of the perf build")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-02-03 18:01:27 -03:00

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Makefile
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# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
# Most of this file is copied from tools/lib/bpf/Makefile
LIBPERF_VERSION = 0
LIBPERF_PATCHLEVEL = 0
LIBPERF_EXTRAVERSION = 1
MAKEFLAGS += --no-print-directory
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
#$(info Determined 'srctree' to be $(srctree))
endif
INSTALL = install
# Use DESTDIR for installing into a different root directory.
# This is useful for building a package. The program will be
# installed in this directory as if it was the root directory.
# Then the build tool can move it later.
DESTDIR ?=
DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
include $(srctree)/tools/scripts/Makefile.include
include $(srctree)/tools/scripts/Makefile.arch
ifeq ($(LP64), 1)
libdir_relative = lib64
else
libdir_relative = lib
endif
prefix ?=
libdir = $(prefix)/$(libdir_relative)
# Shell quotes
libdir_SQ = $(subst ','\'',$(libdir))
libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
TEST_ARGS := $(if $(V),-v)
INCLUDES = \
-I$(srctree)/tools/lib/perf/include \
-I$(srctree)/tools/lib/ \
-I$(srctree)/tools/include \
-I$(srctree)/tools/arch/$(SRCARCH)/include/ \
-I$(srctree)/tools/arch/$(SRCARCH)/include/uapi \
-I$(srctree)/tools/include/uapi
# Append required CFLAGS
override CFLAGS := $(INCLUDES) $(CFLAGS)
override CFLAGS += -g -Werror -Wall
override CFLAGS += -fPIC
override CFLAGS += -fvisibility=hidden
override CFLAGS += $(EXTRA_WARNINGS)
override CFLAGS += $(EXTRA_CFLAGS)
all:
export srctree OUTPUT CC LD CFLAGS V
export DESTDIR DESTDIR_SQ
include $(srctree)/tools/build/Makefile.include
VERSION_SCRIPT := libperf.map
PATCHLEVEL = $(LIBPERF_PATCHLEVEL)
EXTRAVERSION = $(LIBPERF_EXTRAVERSION)
VERSION = $(LIBPERF_VERSION).$(LIBPERF_PATCHLEVEL).$(LIBPERF_EXTRAVERSION)
LIBPERF_SO := $(OUTPUT)libperf.so.$(VERSION)
LIBPERF_A := $(OUTPUT)libperf.a
LIBPERF_IN := $(OUTPUT)libperf-in.o
LIBPERF_PC := $(OUTPUT)libperf.pc
LIBPERF_ALL := $(LIBPERF_A) $(OUTPUT)libperf.so*
LIB_DIR := $(srctree)/tools/lib/api/
ifneq ($(OUTPUT),)
ifneq ($(subdir),)
API_PATH=$(OUTPUT)/../lib/api/
else
API_PATH=$(OUTPUT)
endif
else
API_PATH=$(LIB_DIR)
endif
LIBAPI = $(API_PATH)libapi.a
export LIBAPI
$(LIBAPI): FORCE
$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) $(OUTPUT)libapi.a
$(LIBAPI)-clean:
$(call QUIET_CLEAN, libapi)
$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) clean >/dev/null
$(LIBPERF_IN): FORCE
$(Q)$(MAKE) $(build)=libperf
$(LIBPERF_A): $(LIBPERF_IN)
$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIBPERF_IN)
$(LIBPERF_SO): $(LIBPERF_IN) $(LIBAPI)
$(QUIET_LINK)$(CC) --shared -Wl,-soname,libperf.so \
-Wl,--version-script=$(VERSION_SCRIPT) $^ -o $@
@ln -sf $(@F) $(OUTPUT)libperf.so
@ln -sf $(@F) $(OUTPUT)libperf.so.$(LIBPERF_VERSION)
libs: $(LIBPERF_A) $(LIBPERF_SO) $(LIBPERF_PC)
all: fixdep
$(Q)$(MAKE) libs
clean: $(LIBAPI)-clean
$(call QUIET_CLEAN, libperf) $(RM) $(LIBPERF_A) \
*.o *~ *.a *.so *.so.$(VERSION) *.so.$(LIBPERF_VERSION) .*.d .*.cmd tests/*.o LIBPERF-CFLAGS $(LIBPERF_PC) \
$(TESTS_STATIC) $(TESTS_SHARED)
TESTS_IN = tests-in.o
TESTS_STATIC = $(OUTPUT)tests-static
TESTS_SHARED = $(OUTPUT)tests-shared
$(TESTS_IN): FORCE
$(Q)$(MAKE) $(build)=tests
$(TESTS_STATIC): $(TESTS_IN) $(LIBPERF_A) $(LIBAPI)
$(QUIET_LINK)$(CC) -o $@ $^
$(TESTS_SHARED): $(TESTS_IN) $(LIBAPI)
$(QUIET_LINK)$(CC) -o $@ -L$(or $(OUTPUT),.) $^ -lperf
make-tests: libs $(TESTS_SHARED) $(TESTS_STATIC)
tests: make-tests
@echo "running static:"
@./$(TESTS_STATIC) $(TEST_ARGS)
@echo "running dynamic:"
@LD_LIBRARY_PATH=. ./$(TESTS_SHARED) $(TEST_ARGS)
$(LIBPERF_PC):
$(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
-e "s|@LIBDIR@|$(libdir_SQ)|" \
-e "s|@VERSION@|$(VERSION)|" \
< libperf.pc.template > $@
define do_install_mkdir
if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
fi
endef
define do_install
if [ ! -d '$2' ]; then \
$(INSTALL) -d -m 755 '$2'; \
fi; \
$(INSTALL) $1 $(if $3,-m $3,) '$2'
endef
install_lib: libs
$(call QUIET_INSTALL, $(LIBPERF_ALL)) \
$(call do_install_mkdir,$(libdir_SQ)); \
cp -fpR $(LIBPERF_ALL) $(DESTDIR)$(libdir_SQ)
HDRS := bpf_perf.h core.h cpumap.h threadmap.h evlist.h evsel.h event.h mmap.h
HDRS += schedstat-v15.h schedstat-v16.h schedstat-v17.h
INTERNAL_HDRS := cpumap.h evlist.h evsel.h lib.h mmap.h rc_check.h threadmap.h xyarray.h
INSTALL_HDRS_PFX := $(DESTDIR)$(prefix)/include/perf
INSTALL_HDRS := $(addprefix $(INSTALL_HDRS_PFX)/, $(HDRS))
INSTALL_INTERNAL_HDRS_PFX := $(DESTDIR)$(prefix)/include/internal
INSTALL_INTERNAL_HDRS := $(addprefix $(INSTALL_INTERNAL_HDRS_PFX)/, $(INTERNAL_HDRS))
$(INSTALL_HDRS): $(INSTALL_HDRS_PFX)/%.h: include/perf/%.h
$(call QUIET_INSTALL, $@) \
$(call do_install,$<,$(INSTALL_HDRS_PFX)/,644)
$(INSTALL_INTERNAL_HDRS): $(INSTALL_INTERNAL_HDRS_PFX)/%.h: include/internal/%.h
$(call QUIET_INSTALL, $@) \
$(call do_install,$<,$(INSTALL_INTERNAL_HDRS_PFX)/,644)
install_headers: $(INSTALL_HDRS) $(INSTALL_INTERNAL_HDRS)
$(call QUIET_INSTALL, libperf_headers)
install_pkgconfig: $(LIBPERF_PC)
$(call QUIET_INSTALL, $(LIBPERF_PC)) \
$(call do_install,$(LIBPERF_PC),$(DESTDIR_SQ)$(libdir_SQ)/pkgconfig,644)
install_doc:
$(Q)$(MAKE) -C Documentation install-man install-html install-examples
install: install_lib install_headers install_pkgconfig install_doc
FORCE:
.PHONY: all install clean tests FORCE
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