xref: /linux/tools/bpf/resolve_btfids/Makefile (revision 9d19ca5d0e8b4a3f4b2eaa14e86a25f1c93ff35b) 
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  msg =
9else
10  ifeq ($(silent),1)
11    msg =
12  else
13    msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
14  endif
15  MAKEFLAGS=--no-print-directory
16endif
17
18# Overrides for the prepare step libraries.
19HOST_OVERRIDES := AR="$(HOSTAR)" CC="$(HOSTCC)" LD="$(HOSTLD)" ARCH="$(HOSTARCH)" \
20		  CROSS_COMPILE="" CLANG_CROSS_FLAGS="" EXTRA_CFLAGS="$(HOSTCFLAGS)"
21
22RM      ?= rm
23HOSTCC  ?= gcc
24HOSTLD  ?= ld
25HOSTAR  ?= ar
26HOSTPKG_CONFIG ?= pkg-config
27CROSS_COMPILE =
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
35LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
36SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
37SUBCMD_OUT := $(abspath $(dir $(SUBCMDOBJ)))/
38
39LIBBPF_DESTDIR := $(LIBBPF_OUT)
40LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
41
42SUBCMD_DESTDIR := $(SUBCMD_OUT)
43
44BINARY     := $(OUTPUT)/resolve_btfids
45BINARY_IN  := $(BINARY)-in.o
46
47all: $(BINARY)
48
49prepare: $(BPFOBJ) $(SUBCMDOBJ)
50
51$(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
52	$(call msg,MKDIR,,$@)
53	$(Q)mkdir -p $(@)
54
55$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
56	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(SUBCMD_OUT) \
57		    DESTDIR=$(SUBCMD_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
58		    $(abspath $@)
59
60$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
61	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT)    \
62		    DESTDIR=$(LIBBPF_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
63		    $(abspath $@) install_headers
64
65LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
66
67ifneq ($(filter -static,$(EXTRA_LDFLAGS)),)
68LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs --static 2>/dev/null || echo -lelf -lzstd)
69else
70LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
71endif
72
73ZLIB_LIBS  := $(shell $(HOSTPKG_CONFIG) zlib --libs 2>/dev/null || echo -lz)
74
75HOSTCFLAGS_resolve_btfids += -g \
76          -I$(srctree)/tools/include \
77          -I$(srctree)/tools/include/uapi \
78          -I$(LIBBPF_INCLUDE) \
79          -I$(srctree)/tools/lib \
80          $(LIBELF_FLAGS) \
81          -Wall -Werror
82
83LIBS = $(LIBELF_LIBS) $(ZLIB_LIBS)
84
85export srctree OUTPUT HOSTCFLAGS_resolve_btfids Q HOSTCC HOSTLD HOSTAR
86include $(srctree)/tools/build/Makefile.include
87
88$(BINARY_IN): fixdep FORCE prepare | $(OUTPUT)
89	$(Q)$(MAKE) $(build)=resolve_btfids
90
91$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
92	$(call msg,LINK,$@)
93	$(Q)$(HOSTCC) $(BINARY_IN) $(KBUILD_HOSTLDFLAGS) $(EXTRA_LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
94
95clean_objects := $(wildcard $(OUTPUT)/*.o                \
96                            $(OUTPUT)/.*.o.cmd           \
97                            $(OUTPUT)/.*.o.d             \
98                            $(LIBBPF_OUT)                \
99                            $(LIBBPF_DESTDIR)            \
100                            $(SUBCMD_OUT)                \
101                            $(SUBCMD_DESTDIR)            \
102                            $(OUTPUT)/resolve_btfids)
103
104ifneq ($(clean_objects),)
105clean: fixdep-clean
106	$(call msg,CLEAN,$(BINARY))
107	$(Q)$(RM) -rf $(clean_objects)
108else
109clean:
110endif
111
112tags:
113	$(call msg,GEN,,tags)
114	$(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
115
116FORCE:
117
118.PHONY: all FORCE clean tags prepare
119