| # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
| OUTPUT := .output |
| CLANG ?= clang |
| LLVM_STRIP ?= llvm-strip |
| BPFTOOL ?= bin/bpftool |
| LIBBPF_SRC := $(abspath ../src/cc/libbpf/src) |
| LIBBPF_OBJ := $(abspath $(OUTPUT)/libbpf.a) |
| INCLUDES := -I$(OUTPUT) |
| CFLAGS := -g -O2 -Wall |
| |
| APPS = drsnoop runqslower |
| |
| .PHONY: all |
| all: $(APPS) |
| |
| ifeq ($(V),1) |
| Q = |
| msg = |
| else |
| Q = @ |
| msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))"; |
| MAKEFLAGS += --no-print-directory |
| endif |
| |
| .PHONY: clean |
| clean: |
| $(call msg,CLEAN) |
| $(Q)rm -rf $(OUTPUT) $(APPS) |
| |
| $(OUTPUT) $(OUTPUT)/libbpf: |
| $(call msg,MKDIR,$@) |
| $(Q)mkdir -p $@ |
| |
| $(APPS): %: $(OUTPUT)/%.o $(LIBBPF_OBJ) $(OUTPUT)/trace_helpers.o | $(OUTPUT) |
| $(call msg,BINARY,$@) |
| $(Q)$(CC) $(CFLAGS) $^ -lelf -lz -o $@ |
| |
| $(patsubst %,$(OUTPUT)/%.o,$(APPS)): %.o: %.skel.h |
| |
| $(OUTPUT)/%.o: %.c $(wildcard %.h) | $(OUTPUT) |
| $(call msg,CC,$@) |
| $(Q)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@ |
| |
| $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(OUTPUT) |
| $(call msg,GEN-SKEL,$@) |
| $(Q)$(BPFTOOL) gen skeleton $< > $@ |
| |
| $(OUTPUT)/%.bpf.o: %.bpf.c $(LIBBPF_OBJ) $(wildcard %.h) vmlinux.h | $(OUTPUT) |
| $(call msg,BPF,$@) |
| $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ |
| -c $(filter %.c,$^) -o $@ && \ |
| $(LLVM_STRIP) -g $@ |
| |
| # Build libbpf.a |
| $(LIBBPF_OBJ): $(wildcard $(LIBBPF_SRC)/*.[ch]) | $(OUTPUT)/libbpf |
| $(call msg,LIB,$@) |
| $(Q)$(MAKE) -C $(LIBBPF_SRC) BUILD_STATIC_ONLY=1 \ |
| OBJDIR=$(dir $@)/libbpf DESTDIR=$(dir $@) \ |
| INCLUDEDIR= LIBDIR= UAPIDIR= \ |
| install |
| |
| # delete failed targets |
| .DELETE_ON_ERROR: |
| # keep intermediate (.skel.h, .bpf.o, etc) targets |
| .SECONDARY: |
| |