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
29LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
30SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
31
32LIBBPF_DESTDIR := $(LIBBPF_OUT)
33LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
34
35BINARY     := $(OUTPUT)/resolve_btfids
36BINARY_IN  := $(BINARY)-in.o
37
38all: $(BINARY)
39
40$(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
41	$(call msg,MKDIR,,$@)
42	$(Q)mkdir -p $(@)
43
44$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
45	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
46
47$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
48	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT)    \
49		    DESTDIR=$(LIBBPF_DESTDIR) prefix=			       \
50		    $(abspath $@) install_headers
51
52CFLAGS := -g \
53          -I$(srctree)/tools/include \
54          -I$(srctree)/tools/include/uapi \
55          -I$(LIBBPF_INCLUDE) \
56          -I$(SUBCMD_SRC)
57
58LIBS = -lelf -lz
59
60export srctree OUTPUT CFLAGS Q
61include $(srctree)/tools/build/Makefile.include
62
63$(BINARY_IN): $(BPFOBJ) fixdep FORCE | $(OUTPUT)
64	$(Q)$(MAKE) $(build)=resolve_btfids
65
66$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
67	$(call msg,LINK,$@)
68	$(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
69
70clean_objects := $(wildcard $(OUTPUT)/*.o                \
71                            $(OUTPUT)/.*.o.cmd           \
72                            $(OUTPUT)/.*.o.d             \
73                            $(LIBBPF_OUT)                \
74                            $(LIBBPF_DESTDIR)            \
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