1# SPDX-License-Identifier: GPL-2.0 2OUTPUT := .output 3abs_out := $(abspath $(OUTPUT)) 4 5CLANG ?= clang 6LLC ?= llc 7LLVM_STRIP ?= llvm-strip 8 9TOOLS_PATH := $(abspath ../../../../tools) 10BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool 11BPFTOOL_OUTPUT := $(abs_out)/bpftool 12DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool 13BPFTOOL ?= $(DEFAULT_BPFTOOL) 14 15LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf 16LIBBPF_OUTPUT := $(abs_out)/libbpf 17LIBBPF_DESTDIR := $(LIBBPF_OUTPUT) 18LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include 19BPFOBJ := $(LIBBPF_OUTPUT)/libbpf.a 20 21INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I$(TOOLS_PATH)/include/uapi 22CFLAGS := -g -Wall 23 24ifeq ($(V),1) 25Q = 26msg = 27else 28Q = @ 29msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))"; 30MAKEFLAGS += --no-print-directory 31submake_extras := feature_display=0 32endif 33 34.DELETE_ON_ERROR: 35 36.PHONY: all clean 37 38all: iterators.lskel.h 39 40clean: 41 $(call msg,CLEAN) 42 $(Q)rm -rf $(OUTPUT) iterators 43 44iterators.lskel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL) 45 $(call msg,GEN-SKEL,$@) 46 $(Q)$(BPFTOOL) gen skeleton -L $< > $@ 47 48 49$(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT) 50 $(call msg,BPF,$@) 51 $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ 52 -c $(filter %.c,$^) -o $@ && \ 53 $(LLVM_STRIP) -g $@ 54 55$(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): 56 $(call msg,MKDIR,$@) 57 $(Q)mkdir -p $@ 58 59$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT) 60 $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \ 61 OUTPUT=$(abspath $(dir $@))/ prefix= \ 62 DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers 63 64$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT) 65 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap 66