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1# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)2include ../../scripts/Makefile.include3 4OUTPUT ?= $(abspath .output)/5 6BPFTOOL_OUTPUT := $(OUTPUT)bpftool/7DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bootstrap/bpftool8BPFTOOL ?= $(DEFAULT_BPFTOOL)9LIBBPF_SRC := $(abspath ../../lib/bpf)10BPFOBJ_OUTPUT := $(OUTPUT)libbpf/11BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a12BPF_DESTDIR := $(BPFOBJ_OUTPUT)13BPF_INCLUDE := $(BPF_DESTDIR)/include14INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../include/uapi)15CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS)16CFLAGS += $(EXTRA_CFLAGS)17LDFLAGS += $(EXTRA_LDFLAGS)18LDLIBS += -lelf -lz19 20# Try to detect best kernel BTF source21KERNEL_REL := $(shell uname -r)22VMLINUX_BTF_PATHS := $(if $(O),$(O)/vmlinux) \23 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \24 ../../../vmlinux /sys/kernel/btf/vmlinux \25 /boot/vmlinux-$(KERNEL_REL)26VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \27 $(wildcard $(VMLINUX_BTF_PATHS))))28 29ifeq ($(V),1)30Q =31else32Q = @33MAKEFLAGS += --no-print-directory34submake_extras := feature_display=035endif36 37.DELETE_ON_ERROR:38 39.PHONY: all clean runqslower libbpf_hdrs40all: runqslower41 42runqslower: $(OUTPUT)/runqslower43 44clean:45 $(call QUIET_CLEAN, runqslower)46 $(Q)$(RM) -r $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT)47 $(Q)$(RM) $(OUTPUT)*.o $(OUTPUT)*.d48 $(Q)$(RM) $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h49 $(Q)$(RM) $(OUTPUT)runqslower50 $(Q)$(RM) -r .output51 52libbpf_hdrs: $(BPFOBJ)53 54$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)55 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@56 57$(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h \58 $(OUTPUT)/runqslower.bpf.o | libbpf_hdrs59 60$(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.h runqslower.h | libbpf_hdrs61 62$(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)63 $(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@64 65$(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)66 $(QUIET_GEN)$(CLANG) -g -O2 --target=bpf $(INCLUDES) \67 -c $(filter %.c,$^) -o $@ && \68 $(LLVM_STRIP) -g $@69 70$(OUTPUT)/%.o: %.c | $(OUTPUT)71 $(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@72 73$(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT):74 $(QUIET_MKDIR)mkdir -p $@75 76$(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)77ifeq ($(VMLINUX_H),)78 $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \79 echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \80 "specify its location." >&2; \81 exit 1;\82 fi83 $(QUIET_GEN)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@84else85 $(Q)cp "$(VMLINUX_H)" $@86endif87 88$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(BPFOBJ_OUTPUT)89 $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(BPFOBJ_OUTPUT) \90 DESTDIR=$(BPFOBJ_OUTPUT) prefix= $(abspath $@) install_headers91 92$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)93 $(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT) bootstrap94