xref: /openbmc/linux/tools/bpf/bpftool/Makefile (revision 0d3b051a) 
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)
22  BOOTSTRAP_OUTPUT = $(OUTPUT)/bootstrap/
23else
24  LIBBPF_OUTPUT =
25  LIBBPF_PATH = $(BPF_DIR)
26  BOOTSTRAP_OUTPUT = $(CURDIR)/bootstrap/
27endif
28
29LIBBPF = $(LIBBPF_PATH)libbpf.a
30LIBBPF_BOOTSTRAP_OUTPUT = $(BOOTSTRAP_OUTPUT)libbpf/
31LIBBPF_BOOTSTRAP = $(LIBBPF_BOOTSTRAP_OUTPUT)libbpf.a
32
33ifeq ($(BPFTOOL_VERSION),)
34BPFTOOL_VERSION := $(shell make -rR --no-print-directory -sC ../../.. kernelversion)
35endif
36
37$(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT) $(LIBBPF_BOOTSTRAP_OUTPUT):
38	$(QUIET_MKDIR)mkdir -p $@
39
40$(LIBBPF): FORCE | $(LIBBPF_OUTPUT)
41	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) $(LIBBPF_OUTPUT)libbpf.a
42
43$(LIBBPF_BOOTSTRAP): FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
44	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) \
45		ARCH= CC=$(HOSTCC) LD=$(HOSTLD) $@
46
47$(LIBBPF)-clean: FORCE | $(LIBBPF_OUTPUT)
48	$(call QUIET_CLEAN, libbpf)
49	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
50
51$(LIBBPF_BOOTSTRAP)-clean: FORCE | $(LIBBPF_BOOTSTRAP_OUTPUT)
52	$(call QUIET_CLEAN, libbpf-bootstrap)
53	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_BOOTSTRAP_OUTPUT) clean >/dev/null
54
55prefix ?= /usr/local
56bash_compdir ?= /usr/share/bash-completion/completions
57
58CFLAGS += -O2
59CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
60CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
61CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
62	-I$(if $(OUTPUT),$(OUTPUT),.) \
63	-I$(srctree)/kernel/bpf/ \
64	-I$(srctree)/tools/include \
65	-I$(srctree)/tools/include/uapi \
66	-I$(srctree)/tools/lib \
67	-I$(srctree)/tools/perf
68CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
69ifneq ($(EXTRA_CFLAGS),)
70CFLAGS += $(EXTRA_CFLAGS)
71endif
72ifneq ($(EXTRA_LDFLAGS),)
73LDFLAGS += $(EXTRA_LDFLAGS)
74endif
75
76INSTALL ?= install
77RM ?= rm -f
78CLANG ?= clang
79LLVM_STRIP ?= llvm-strip
80
81FEATURE_USER = .bpftool
82FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
83	clang-bpf-co-re
84FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
85	clang-bpf-co-re
86
87check_feat := 1
88NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
89ifdef MAKECMDGOALS
90ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
91  check_feat := 0
92endif
93endif
94
95ifeq ($(check_feat),1)
96ifeq ($(FEATURES_DUMP),)
97include $(srctree)/tools/build/Makefile.feature
98else
99include $(FEATURES_DUMP)
100endif
101endif
102
103ifeq ($(feature-disassembler-four-args), 1)
104CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
105endif
106
107ifeq ($(feature-reallocarray), 0)
108CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
109endif
110
111LIBS = $(LIBBPF) -lelf -lz
112LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz
113ifeq ($(feature-libcap), 1)
114CFLAGS += -DUSE_LIBCAP
115LIBS += -lcap
116endif
117
118include $(wildcard $(OUTPUT)*.d)
119
120all: $(OUTPUT)bpftool
121
122BFD_SRCS = jit_disasm.c
123
124SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
125
126ifeq ($(feature-libbfd),1)
127  LIBS += -lbfd -ldl -lopcodes
128else ifeq ($(feature-libbfd-liberty),1)
129  LIBS += -lbfd -ldl -lopcodes -liberty
130else ifeq ($(feature-libbfd-liberty-z),1)
131  LIBS += -lbfd -ldl -lopcodes -liberty -lz
132endif
133
134ifneq ($(filter -lbfd,$(LIBS)),)
135CFLAGS += -DHAVE_LIBBFD_SUPPORT
136SRCS += $(BFD_SRCS)
137endif
138
139BPFTOOL_BOOTSTRAP := $(BOOTSTRAP_OUTPUT)bpftool
140
141BOOTSTRAP_OBJS = $(addprefix $(BOOTSTRAP_OUTPUT),main.o common.o json_writer.o gen.o btf.o)
142OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
143
144VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
145		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
146		     ../../../vmlinux					\
147		     /sys/kernel/btf/vmlinux				\
148		     /boot/vmlinux-$(shell uname -r)
149VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
150
151ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
152ifeq ($(feature-clang-bpf-co-re),1)
153
154BUILD_BPF_SKELS := 1
155
156$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
157ifeq ($(VMLINUX_H),)
158	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
159else
160	$(Q)cp "$(VMLINUX_H)" $@
161endif
162
163$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
164	$(QUIET_CLANG)$(CLANG) \
165		-I$(if $(OUTPUT),$(OUTPUT),.) \
166		-I$(srctree)/tools/include/uapi/ \
167		-I$(LIBBPF_PATH) \
168		-I$(srctree)/tools/lib \
169		-g -O2 -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
170
171$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
172	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
173
174$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
175
176$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
177
178endif
179endif
180
181CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
182
183$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
184	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
185
186$(OUTPUT)feature.o: | zdep
187
188$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF_BOOTSTRAP)
189	$(QUIET_LINK)$(HOSTCC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) \
190		$(LIBS_BOOTSTRAP)
191
192$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
193	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
194
195$(BOOTSTRAP_OUTPUT)%.o: %.c | $(BOOTSTRAP_OUTPUT)
196	$(QUIET_CC)$(HOSTCC) $(CFLAGS) -c -MMD -o $@ $<
197
198$(OUTPUT)%.o: %.c
199	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
200
201feature-detect-clean:
202	$(call QUIET_CLEAN, feature-detect)
203	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
204
205clean: $(LIBBPF)-clean $(LIBBPF_BOOTSTRAP)-clean feature-detect-clean
206	$(call QUIET_CLEAN, bpftool)
207	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
208	$(Q)$(RM) -- $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
209	$(Q)$(RM) -r -- $(LIBBPF_OUTPUT) $(BOOTSTRAP_OUTPUT)
210	$(call QUIET_CLEAN, core-gen)
211	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
212	$(Q)$(RM) -r -- $(OUTPUT)feature/
213
214install: $(OUTPUT)bpftool
215	$(call QUIET_INSTALL, bpftool)
216	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
217	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
218	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
219	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
220
221uninstall:
222	$(call QUIET_UNINST, bpftool)
223	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
224	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
225
226doc:
227	$(call descend,Documentation)
228
229doc-clean:
230	$(call descend,Documentation,clean)
231
232doc-install:
233	$(call descend,Documentation,install)
234
235doc-uninstall:
236	$(call descend,Documentation,uninstall)
237
238FORCE:
239
240zdep:
241	@if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
242
243.SECONDARY:
244.PHONY: all FORCE clean install uninstall zdep
245.PHONY: doc doc-clean doc-install doc-uninstall
246.DEFAULT_GOAL := all
247