1 # SPDX-License-Identifier: GPL-2.0
3 abs_out := $(abspath $(OUTPUT))
7 LLVM_STRIP ?= llvm-strip
9 TOOLS_PATH := $(abspath ../../../../tools)
10 BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
11 BPFTOOL_OUTPUT := $(abs_out)/bpftool
12 DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
13 BPFTOOL ?= $(DEFAULT_BPFTOOL)
15 LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf
16 LIBBPF_OUTPUT := $(abs_out)/libbpf
17 LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
18 LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
19 BPFOBJ := $(LIBBPF_OUTPUT)/libbpf.a
21 INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I$(TOOLS_PATH)/include/uapi
29 msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
30 MAKEFLAGS += --no-print-directory
31 submake_extras := feature_display=0
38 all: iterators.lskel.h
42 $(Q)rm -rf $(OUTPUT) iterators
44 iterators.lskel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
45 $(call msg,GEN-SKEL,$@)
46 $(Q)$(BPFTOOL) gen skeleton -L $< > $@
49 $(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
51 $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES) \
52 -c $(filter %.c,$^) -o $@ && \
55 $(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
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
64 $(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT)
65 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) \
66 OUTPUT=$(BPFTOOL_OUTPUT)/ \
67 LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \
68 LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ \
69 prefix= DESTDIR=$(abs_out)/ install-bin