xref: /linux/tools/bpf/resolve_btfids/Makefile (revision 473f6c8f437b049f8ec015d57cd59bb983b1d85c) 
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
23HOSTPKG_CONFIG ?= pkg-config
24CROSS_COMPILE =
25
26OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
27
28LIBBPF_SRC := $(srctree)/tools/lib/bpf/
29SUBCMD_SRC := $(srctree)/tools/lib/subcmd/
30
31BPFOBJ     := $(OUTPUT)/libbpf/libbpf.a
32LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
33SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
34SUBCMD_OUT := $(abspath $(dir $(SUBCMDOBJ)))/
35
36LIBBPF_DESTDIR := $(LIBBPF_OUT)
37LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
38
39SUBCMD_DESTDIR := $(SUBCMD_OUT)
40
41BINARY     := $(OUTPUT)/resolve_btfids
42BINARY_IN  := $(BINARY)-in.o
43
44all: $(BINARY)
45
46prepare: $(BPFOBJ) $(SUBCMDOBJ)
47
48$(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
49	$(call msg,MKDIR,,$@)
50	$(Q)mkdir -p $(@)
51
52$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
53	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(SUBCMD_OUT) \
54		    DESTDIR=$(SUBCMD_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
55		    $(abspath $@)
56
57$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
58	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT)    \
59		    DESTDIR=$(LIBBPF_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
60		    $(abspath $@) install_headers
61
62LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
63
64ifneq ($(filter -static,$(EXTRA_LDFLAGS)),)
65LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs --static 2>/dev/null || echo -lelf -lzstd)
66else
67LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
68endif
69
70ZLIB_LIBS  := $(shell $(HOSTPKG_CONFIG) zlib --libs 2>/dev/null || echo -lz)
71
72HOSTCFLAGS_resolve_btfids += -g \
73          -I$(srctree)/tools/include \
74          -I$(srctree)/tools/include/uapi \
75          -I$(LIBBPF_INCLUDE) \
76          -I$(srctree)/tools/lib \
77          $(LIBELF_FLAGS) \
78          -Wall -Werror
79
80LIBS = $(LIBELF_LIBS) $(ZLIB_LIBS)
81
82export srctree OUTPUT HOSTCFLAGS_resolve_btfids Q HOSTCC HOSTLD HOSTAR
83include $(srctree)/tools/build/Makefile.include
84
85$(BINARY_IN): fixdep FORCE prepare | $(OUTPUT)
86	$(Q)$(MAKE) $(build)=resolve_btfids
87
88$(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
89	$(call msg,LINK,$@)
90	$(Q)$(HOSTCC) $(BINARY_IN) $(KBUILD_HOSTLDFLAGS) $(EXTRA_LDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
91
92clean_objects := $(wildcard $(OUTPUT)/*.o                \
93                            $(OUTPUT)/.*.o.cmd           \
94                            $(OUTPUT)/.*.o.d             \
95                            $(LIBBPF_OUT)                \
96                            $(LIBBPF_DESTDIR)            \
97                            $(SUBCMD_OUT)                \
98                            $(SUBCMD_DESTDIR)            \
99                            $(OUTPUT)/resolve_btfids)
100
101ifneq ($(clean_objects),)
102clean: fixdep-clean
103	$(call msg,CLEAN,$(BINARY))
104	$(Q)$(RM) -rf $(clean_objects)
105else
106clean:
107endif
108
109tags:
110	$(call msg,GEN,,tags)
111	$(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
112
113FORCE:
114
115.PHONY: all FORCE clean tags prepare
116