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1# SPDX-License-Identifier: GPL-2.0-only
2include ../../scripts/Makefile.include
3include ../../scripts/Makefile.arch
4
5srctree := $(abspath $(CURDIR)/../../../)
6
7ifeq ($(V),1)
8  Q =
9  msg =
10else
11  Q = @
12  ifeq ($(silent),1)
13    msg =
14  else
15    msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
16  endif
17  MAKEFLAGS=--no-print-directory
18endif
19
20# always use the host compiler
21AR       = $(HOSTAR)
22CC       = $(HOSTCC)
23LD       = $(HOSTLD)
24ARCH     = $(HOSTARCH)
25RM      ?= rm
26CFLAGS  := $(KBUILD_HOSTCFLAGS)
27LDFLAGS := $(KBUILD_HOSTLDFLAGS)
28
29OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
30
31LIBBPF_SRC := $(srctree)/tools/lib/bpf/
32SUBCMD_SRC := $(srctree)/tools/lib/subcmd/
33
34BPFOBJ     := $(OUTPUT)/libbpf/libbpf.a
35SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
36
37BINARY     := $(OUTPUT)/resolve_btfids
38BINARY_IN  := $(BINARY)-in.o
39
40all: $(BINARY)
41
42$(OUTPUT) $(OUTPUT)/libbpf $(OUTPUT)/libsubcmd:
43	$(call msg,MKDIR,,$@)
44	$(Q)mkdir -p $(@)
45
46$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
47	$(Q)$(MAKE) -C $(SUBCMD_SRC) EXTRA_CFLAGS="$(CFLAGS)" OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
48
49$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)/libbpf
50	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)  OUTPUT=$(abspath $(dir $@))/ \
51		EXTRA_CFLAGS="$(CFLAGS)" $(abspath $@)
52
53CFLAGS += -g \
54          -I$(srctree)/tools/include \
55          -I$(srctree)/tools/include/uapi \
56          -I$(LIBBPF_SRC) \
57          -I$(SUBCMD_SRC)
58
59LIBS = -lelf -lz
60
61export srctree OUTPUT CFLAGS Q
62include $(srctree)/tools/build/Makefile.include
63
64$(BINARY_IN): fixdep FORCE | $(OUTPUT)
65	$(Q)$(MAKE) $(build)=resolve_btfids
66
67$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
68	$(call msg,LINK,$@)
69	$(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
70
71clean_objects := $(wildcard $(OUTPUT)/*.o                \
72                            $(OUTPUT)/.*.o.cmd           \
73                            $(OUTPUT)/.*.o.d             \
74                            $(OUTPUT)/libbpf             \
75                            $(OUTPUT)/libsubcmd          \
76                            $(OUTPUT)/resolve_btfids)
77
78ifneq ($(clean_objects),)
79clean: fixdep-clean
80	$(call msg,CLEAN,$(BINARY))
81	$(Q)$(RM) -rf $(clean_objects)
82else
83clean:
84endif
85
86tags:
87	$(call msg,GEN,,tags)
88	$(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
89
90FORCE:
91
92.PHONY: all FORCE clean tags
93