xref: /openbmc/linux/tools/bpf/bpftool/Makefile (revision 52cdded0) 
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): FORCE
31	$(if $(LIBBPF_OUTPUT),@mkdir -p $(LIBBPF_OUTPUT))
32	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) $(LIBBPF_OUTPUT)libbpf.a
33
34$(LIBBPF)-clean:
35	$(call QUIET_CLEAN, libbpf)
36	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(LIBBPF_OUTPUT) clean >/dev/null
37
38prefix ?= /usr/local
39bash_compdir ?= /usr/share/bash-completion/completions
40
41CFLAGS += -O2
42CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
43CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
44CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
45	-I$(if $(OUTPUT),$(OUTPUT),.) \
46	-I$(srctree)/kernel/bpf/ \
47	-I$(srctree)/tools/include \
48	-I$(srctree)/tools/include/uapi \
49	-I$(srctree)/tools/lib \
50	-I$(srctree)/tools/perf
51CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
52ifneq ($(EXTRA_CFLAGS),)
53CFLAGS += $(EXTRA_CFLAGS)
54endif
55ifneq ($(EXTRA_LDFLAGS),)
56LDFLAGS += $(EXTRA_LDFLAGS)
57endif
58
59INSTALL ?= install
60RM ?= rm -f
61CLANG ?= clang
62LLVM_STRIP ?= llvm-strip
63
64FEATURE_USER = .bpftool
65FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \
66	clang-bpf-co-re
67FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \
68	clang-bpf-co-re
69
70check_feat := 1
71NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
72ifdef MAKECMDGOALS
73ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
74  check_feat := 0
75endif
76endif
77
78ifeq ($(check_feat),1)
79ifeq ($(FEATURES_DUMP),)
80include $(srctree)/tools/build/Makefile.feature
81else
82include $(FEATURES_DUMP)
83endif
84endif
85
86ifeq ($(feature-disassembler-four-args), 1)
87CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
88endif
89
90ifeq ($(feature-reallocarray), 0)
91CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
92endif
93
94LIBS = $(LIBBPF) -lelf -lz
95ifeq ($(feature-libcap), 1)
96CFLAGS += -DUSE_LIBCAP
97LIBS += -lcap
98endif
99
100include $(wildcard $(OUTPUT)*.d)
101
102all: $(OUTPUT)bpftool
103
104BFD_SRCS = jit_disasm.c
105
106SRCS = $(filter-out $(BFD_SRCS),$(wildcard *.c))
107
108ifeq ($(feature-libbfd),1)
109  LIBS += -lbfd -ldl -lopcodes
110else ifeq ($(feature-libbfd-liberty),1)
111  LIBS += -lbfd -ldl -lopcodes -liberty
112else ifeq ($(feature-libbfd-liberty-z),1)
113  LIBS += -lbfd -ldl -lopcodes -liberty -lz
114endif
115
116ifneq ($(filter -lbfd,$(LIBS)),)
117CFLAGS += -DHAVE_LIBBFD_SUPPORT
118SRCS += $(BFD_SRCS)
119endif
120
121BPFTOOL_BOOTSTRAP := $(if $(OUTPUT),$(OUTPUT)bpftool-bootstrap,./bpftool-bootstrap)
122
123BOOTSTRAP_OBJS = $(addprefix $(OUTPUT),main.o common.o json_writer.o gen.o btf.o)
124OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
125
126VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
127		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
128		     ../../../vmlinux					\
129		     /sys/kernel/btf/vmlinux				\
130		     /boot/vmlinux-$(shell uname -r)
131VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
132
133ifneq ($(VMLINUX_BTF)$(VMLINUX_H),)
134ifeq ($(feature-clang-bpf-co-re),1)
135
136BUILD_BPF_SKELS := 1
137
138$(OUTPUT)vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL_BOOTSTRAP)
139ifeq ($(VMLINUX_H),)
140	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) btf dump file $< format c > $@
141else
142	$(Q)cp "$(VMLINUX_H)" $@
143endif
144
145$(OUTPUT)%.bpf.o: skeleton/%.bpf.c $(OUTPUT)vmlinux.h $(LIBBPF)
146	$(QUIET_CLANG)$(CLANG) \
147		-I$(if $(OUTPUT),$(OUTPUT),.) \
148		-I$(srctree)/tools/include/uapi/ \
149		-I$(LIBBPF_PATH) \
150		-I$(srctree)/tools/lib \
151		-g -O2 -target bpf -c $< -o $@ && $(LLVM_STRIP) -g $@
152
153$(OUTPUT)%.skel.h: $(OUTPUT)%.bpf.o $(BPFTOOL_BOOTSTRAP)
154	$(QUIET_GEN)$(BPFTOOL_BOOTSTRAP) gen skeleton $< > $@
155
156$(OUTPUT)prog.o: $(OUTPUT)profiler.skel.h
157
158$(OUTPUT)pids.o: $(OUTPUT)pid_iter.skel.h
159
160endif
161endif
162
163CFLAGS += $(if $(BUILD_BPF_SKELS),,-DBPFTOOL_WITHOUT_SKELETONS)
164
165$(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
166	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
167
168$(OUTPUT)feature.o: | zdep
169
170$(BPFTOOL_BOOTSTRAP): $(BOOTSTRAP_OBJS) $(LIBBPF)
171	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(BOOTSTRAP_OBJS) $(LIBS)
172
173$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
174	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
175
176$(OUTPUT)%.o: %.c
177	$(QUIET_CC)$(CC) $(CFLAGS) -c -MMD -o $@ $<
178
179clean: $(LIBBPF)-clean
180	$(call QUIET_CLEAN, bpftool)
181	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
182	$(Q)$(RM) -- $(BPFTOOL_BOOTSTRAP) $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
183	$(Q)$(RM) -r -- $(OUTPUT)libbpf/
184	$(call QUIET_CLEAN, core-gen)
185	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
186	$(Q)$(RM) -r -- $(OUTPUT)feature/
187
188install: $(OUTPUT)bpftool
189	$(call QUIET_INSTALL, bpftool)
190	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/sbin
191	$(Q)$(INSTALL) $(OUTPUT)bpftool $(DESTDIR)$(prefix)/sbin/bpftool
192	$(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(bash_compdir)
193	$(Q)$(INSTALL) -m 0644 bash-completion/bpftool $(DESTDIR)$(bash_compdir)
194
195uninstall:
196	$(call QUIET_UNINST, bpftool)
197	$(Q)$(RM) -- $(DESTDIR)$(prefix)/sbin/bpftool
198	$(Q)$(RM) -- $(DESTDIR)$(bash_compdir)/bpftool
199
200doc:
201	$(call descend,Documentation)
202
203doc-clean:
204	$(call descend,Documentation,clean)
205
206doc-install:
207	$(call descend,Documentation,install)
208
209doc-uninstall:
210	$(call descend,Documentation,uninstall)
211
212FORCE:
213
214zdep:
215	@if [ "$(feature-zlib)" != "1" ]; then echo "No zlib found"; exit 1 ; fi
216
217.SECONDARY:
218.PHONY: all FORCE clean install uninstall zdep
219.PHONY: doc doc-clean doc-install doc-uninstall
220.DEFAULT_GOAL := all
221