1# SPDX-License-Identifier: GPL-2.0-only
2include ../../scripts/Makefile.include
3include ../../scripts/Makefile.arch
4
5ifeq ($(srctree),)
6srctree := $(patsubst %/,%,$(dir $(CURDIR)))
7srctree := $(patsubst %/,%,$(dir $(srctree)))
8srctree := $(patsubst %/,%,$(dir $(srctree)))
9endif
10
11ifeq ($(V),1)
12  Q =
13  msg =
14else
15  Q = @
16  msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
17  MAKEFLAGS=--no-print-directory
18endif
19
20# always use the host compiler
21ifneq ($(LLVM),)
22HOSTAR  ?= llvm-ar
23HOSTCC  ?= clang
24HOSTLD  ?= ld.lld
25else
26HOSTAR  ?= ar
27HOSTCC  ?= gcc
28HOSTLD  ?= ld
29endif
30AR       = $(HOSTAR)
31CC       = $(HOSTCC)
32LD       = $(HOSTLD)
33ARCH     = $(HOSTARCH)
34
35OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
36
37LIBBPF_SRC := $(srctree)/tools/lib/bpf/
38SUBCMD_SRC := $(srctree)/tools/lib/subcmd/
39
40BPFOBJ     := $(OUTPUT)/libbpf.a
41SUBCMDOBJ  := $(OUTPUT)/libsubcmd.a
42
43BINARY     := $(OUTPUT)/resolve_btfids
44BINARY_IN  := $(BINARY)-in.o
45
46all: $(BINARY)
47
48$(OUTPUT):
49	$(call msg,MKDIR,,$@)
50	$(Q)mkdir -p $(OUTPUT)
51
52$(SUBCMDOBJ): fixdep FORCE
53	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(OUTPUT)
54
55$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)
56	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)  OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
57
58CFLAGS := -g \
59          -I$(srctree)/tools/include \
60          -I$(srctree)/tools/include/uapi \
61          -I$(LIBBPF_SRC) \
62          -I$(SUBCMD_SRC)
63
64LIBS = -lelf -lz
65
66export srctree OUTPUT CFLAGS Q
67include $(srctree)/tools/build/Makefile.include
68
69$(BINARY_IN): fixdep FORCE
70	$(Q)$(MAKE) $(build)=resolve_btfids
71
72$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
73	$(call msg,LINK,$@)
74	$(Q)$(CC) $(BINARY_IN) $(LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
75
76libsubcmd-clean:
77	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(OUTPUT) clean
78
79libbpf-clean:
80	$(Q)$(MAKE) -C $(LIBBPF_SRC) OUTPUT=$(OUTPUT) clean
81
82clean: libsubcmd-clean libbpf-clean fixdep-clean
83	$(call msg,CLEAN,$(BINARY))
84	$(Q)$(RM) -f $(BINARY); \
85	$(RM) -rf $(if $(OUTPUT),$(OUTPUT),.)/feature; \
86	find $(if $(OUTPUT),$(OUTPUT),.) -name \*.o -or -name \*.o.cmd -or -name \*.o.d | xargs $(RM)
87
88tags:
89	$(call msg,GEN,,tags)
90	$(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
91
92FORCE:
93
94.PHONY: all FORCE clean tags
95