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