xref: /linux/tools/bpf/bpftool/Makefile (revision 9e8929fdbb9c9026bd3a732e9ac7dc9617c86309) 
1# SPDX-License-Identifier: GPL-2.0-only
2include ../../scripts/Makefile.include
3include ../../scripts/utilities.mak
4
5ifeq ($(srctree),)
6srctree := $(patsubst %/,%,$(dir $(CURDIR)))
7srctree := $(patsubst %/,%,$(dir $(srctree)))
8srctree := $(patsubst %/,%,$(dir $(srctree)))
9endif
10
11ifeq ($(V),1)
12  Q =
13else
14  Q = @
15endif
16
17BPF_DIR = $(srctree)/tools/lib/bpf/
18
19ifneq ($(OUTPUT),)
20  LIBBPF_OUTPUT = $(OUTPUT)/libbpf/
21  LIBBPF_PATH = $(LIBBPF_OUTPUT)
22else
23  LIBBPF_PATH = $(BPF_DIR)
24endif
25
26LIBBPF = $(LIBBPF_PATH)libbpf.a
27
28BPFTOOL_VERSION ?= $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
29
30$(LIBBPF_OUTPUT):
31	$(QUIET_MKDIR)mkdir -p $@
32
33$(LIBBPF): FORCE | $(LIBBPF_OUTPUT)
34	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) $(LIBBPF_OUTPUT)libbpf.a
35
36$(LIBBPF)-clean: $(LIBBPF_OUTPUT)
37	$(call QUIET_CLEAN, libbpf)
38	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
39
40prefix ?= /usr/local
41bash_compdir ?= /usr/share/bash-completion/completions
42
43CFLAGS += -O2
44CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
45CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
46CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
47	-I$(if $(OUTPUT),$(OUTPUT),.) \
48	-I$(srctree)/kernel/bpf/ \
49	-I$(srctree)/tools/include \
50	-I$(srctree)/tools/include/uapi \
51	-I$(srctree)/tools/lib \
52	-I$(srctree)/tools/perf
53CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
54ifneq ($(EXTRA_CFLAGS),)
55CFLAGS += $(EXTRA_CFLAGS)
56endif
57ifneq ($(EXTRA_LDFLAGS),)
58LDFLAGS += $(EXTRA_LDFLAGS)
59endif
60
61INSTALL ?= install
62RM ?= rm -f
63CLANG ?= clang
64LLVM_STRIP ?= llvm-strip
65
66FEATURE_USER = .bpftool
67FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
68	clang-bpf-co-re
69FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
70	clang-bpf-co-re
71
72check_feat := 1
73NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
74ifdef MAKECMDGOALS
75ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
76  check_feat := 0
77endif
78endif
79
80ifeq ($(check_feat),1)
81ifeq ($(FEATURES_DUMP),)
82include $(srctree)/tools/build/Makefile.feature
83else
84include $(FEATURES_DUMP)
85endif
86endif
87
88ifeq ($(feature-disassembler-four-args), 1)
89CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
90endif
91
92ifeq ($(feature-reallocarray), 0)
93CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
94endif
95
96LIBS = $(LIBBPF) -lelf -lz
97ifeq ($(feature-libcap), 1)
98CFLAGS += -DUSE_LIBCAP
99LIBS += -lcap
100endif
101
102include $(wildcard $(OUTPUT)*.d)
103
104all: $(OUTPUT)bpftool
105
106BFD_SRCS = jit_disasm.c
107
108SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
109
110ifeq ($(feature-libbfd),1)
111  LIBS += -lbfd -ldl -lopcodes
112else ifeq ($(feature-libbfd-liberty),1)
113  LIBS += -lbfd -ldl -lopcodes -liberty
114else ifeq ($(feature-libbfd-liberty-z),1)
115  LIBS += -lbfd -ldl -lopcodes -liberty -lz
116endif
117
118ifneq ($(filter -lbfd,$(LIBS)),)
119CFLAGS += -DHAVE_LIBBFD_SUPPORT
120SRCS += $(BFD_SRCS)
121endif
122
123BPFTOOL_BOOTSTRAP := $(if $(OUTPUT),$(OUTPUT)bpftool-bootstrap,./bpftool-bootstrap)
124
125BOOTSTRAP_OBJS = $(addprefix $(OUTPUT),main.o common.o json_writer.o gen.o btf.o)
126OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
127
128VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
129		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
130		     ../../../vmlinux					\
131		     /sys/kernel/btf/vmlinux				\
132		     /boot/vmlinux-$(shell uname -r)
133VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
134
135ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
136ifeq ($(feature-clang-bpf-co-re),1)
137
138BUILD_BPF_SKELS := 1
139
140$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
141ifeq ($(VMLINUX_H),)
142	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
143else
144	$(Q)cp "$(VMLINUX_H)" $@
145endif
146
147$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
148	$(QUIET_CLANG)$(CLANG) \
149		-I$(if $(OUTPUT),$(OUTPUT),.) \
150		-I$(srctree)/tools/include/uapi/ \
151		-I$(LIBBPF_PATH) \
152		-I$(srctree)/tools/lib \
153		-g -O2 -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
154
155$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
156	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
157
158$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
159
160$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
161
162endif
163endif
164
165CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
166
167$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
168	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
169
170$(OUTPUT)feature.o: | zdep
171
172$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF)
173	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) $(LIBS)
174
175$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
176	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
177
178$(OUTPUT)%.o: %.c
179	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
180
181feature-detect-clean:
182	$(call QUIET_CLEAN, feature-detect)
183	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
184
185clean: $(LIBBPF)-clean feature-detect-clean
186	$(call QUIET_CLEAN, bpftool)
187	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
188	$(Q)$(RM) -- $(BPFTOOL_BOOTSTRAP) $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
189	$(Q)$(RM) -r -- $(OUTPUT)libbpf/
190	$(call QUIET_CLEAN, core-gen)
191	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
192	$(Q)$(RM) -r -- $(OUTPUT)feature/
193
194install: $(OUTPUT)bpftool
195	$(call QUIET_INSTALL, bpftool)
196	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
197	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
198	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
199	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
200
201uninstall:
202	$(call QUIET_UNINST, bpftool)
203	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
204	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
205
206doc:
207	$(call descend,Documentation)
208
209doc-clean:
210	$(call descend,Documentation,clean)
211
212doc-install:
213	$(call descend,Documentation,install)
214
215doc-uninstall:
216	$(call descend,Documentation,uninstall)
217
218FORCE:
219
220zdep:
221	@if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
222
223.SECONDARY:
224.PHONY: all FORCE clean install uninstall zdep
225.PHONY: doc doc-clean doc-install doc-uninstall
226.DEFAULT_GOAL := all
227