1 # SPDX-License-Identifier: GPL-2.0
2 OUTPUT := .output
3 abs_out := $(abspath $(OUTPUT))
4
5 CLANG ?= clang
6 LLC ?= llc
7 LLVM_STRIP ?= llvm-strip
8
9 TOOLS_PATH := $(abspath ../../../../tools)
10 BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
11 BPFTOOL_OUTPUT := $(abs_out)/bpftool
12 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap
13 BPFTOOL ?= $(DEFAULT_BPFTOOL)
14
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 := $(LIBBPF_OUTPUT)/libbpf.a
20
21 INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I
22 CFLAGS := -g -Wall
23
24 ifeq ($(V),1)
25 Q =
26 msg =
27 else
28 Q = @
29 msg = @printf ' %-8s %s%s\n' "$(1)" "$(notdir
30 MAKEFLAGS += --no-print-directory
31 submake_extras := feature_display=0
32 endif
33
34 .DELETE_ON_ERROR:
35
36 .PHONY: all clean
37
38 all: iterators.lskel-little-endian.h
39
40 big: iterators.lskel-big-endian.h
41
42 clean:
43 $(call msg,CLEAN)
44 $(Q)rm -rf $(OUTPUT) iterators
45
46 iterators.lskel-%.h: $(OUTPUT)/%/iterators.bpf
47 $(call msg,GEN-SKEL,$@)
48 $(Q)$(BPFTOOL) gen skeleton -L $< > $@
49
50 $(OUTPUT)/%/iterators.bpf.o: iterators.bpf.c $
51 $(call msg,BPF,$@)
52 $(Q)mkdir -p $(@D)
53 $(Q)$(CLANG) -g -O2 --target=bpf -m$*
54 -c $(filter %.c,$^) -o $@ &&
55 $(LLVM_STRIP) -g $@
56
57 $(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
58 $(call msg,MKDIR,$@)
59 $(Q)mkdir -p $@
60
61 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L
62 $(Q)$(MAKE) $(submake_extras) -C $(LIB
63 OUTPUT=$(abspath $(dir $@)
64 DESTDIR=$(LIBBPF_DESTDIR)
65
66 $(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
67 $(Q)$(MAKE) $(submake_extras) -C $(BPF
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