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1# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2# Most of this file is copied from tools/lib/traceevent/Makefile
3
4RM ?= rm
5srctree := $(realpath $(srctree))
6
7VERSION_SCRIPT := libbpf.map
8LIBBPF_VERSION := $(shell \
9 grep -oE '^LIBBPF_([0-9.]+)' $(VERSION_SCRIPT) | \
10 sort -rV | head -n1 | cut -d'_' -f2)
11LIBBPF_MAJOR_VERSION := $(word 1,$(subst ., ,$(LIBBPF_VERSION)))
12LIBBPF_MINOR_VERSION := $(word 2,$(subst ., ,$(LIBBPF_VERSION)))
13
14MAKEFLAGS += --no-print-directory
15
16# This will work when bpf is built in tools env. where srctree
17# isn't set and when invoked from selftests build, where srctree
18# is a ".". building_out_of_srctree is undefined for in srctree
19# builds
20ifndef building_out_of_srctree
21srctree := $(patsubst %/,%,$(dir $(CURDIR)))
22srctree := $(patsubst %/,%,$(dir $(srctree)))
23srctree := $(patsubst %/,%,$(dir $(srctree)))
24#$(info Determined 'srctree' to be $(srctree))
25endif
26
27INSTALL = install
28
29# Use DESTDIR for installing into a different root directory.
30# This is useful for building a package. The program will be
31# installed in this directory as if it was the root directory.
32# Then the build tool can move it later.
33DESTDIR ?=
34DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
35
36include $(srctree)/tools/scripts/Makefile.arch
37
38ifeq ($(LP64), 1)
39 libdir_relative = lib64
40else
41 libdir_relative = lib
42endif
43
44prefix ?= /usr/local
45libdir = $(prefix)/$(libdir_relative)
46man_dir = $(prefix)/share/man
47man_dir_SQ = '$(subst ','\'',$(man_dir))'
48
49export man_dir man_dir_SQ INSTALL
50export DESTDIR DESTDIR_SQ
51
52include $(srctree)/tools/scripts/Makefile.include
53
54# copy a bit from Linux kbuild
55
56ifeq ("$(origin V)", "command line")
57 VERBOSE = $(V)
58endif
59ifndef VERBOSE
60 VERBOSE = 0
61endif
62
63INCLUDES = -I$(or $(OUTPUT),.) \
64 -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi
65
66export prefix libdir src obj
67
68# Shell quotes
69libdir_SQ = $(subst ','\'',$(libdir))
70libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
71
72OBJ = $@
73N =
74
75LIB_TARGET = libbpf.a libbpf.so.$(LIBBPF_VERSION)
76LIB_FILE = libbpf.a libbpf.so*
77PC_FILE = libbpf.pc
78
79# Set compile option CFLAGS
80ifdef EXTRA_CFLAGS
81 CFLAGS := $(EXTRA_CFLAGS)
82else
83 CFLAGS := -g -O2
84endif
85
86# Append required CFLAGS
87override CFLAGS += -std=gnu89
88override CFLAGS += $(EXTRA_WARNINGS) -Wno-switch-enum
89override CFLAGS += -Werror -Wall
90override CFLAGS += $(INCLUDES)
91override CFLAGS += -fvisibility=hidden
92override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
93override CFLAGS += $(CLANG_CROSS_FLAGS)
94
95# flags specific for shared library
96SHLIB_FLAGS := -DSHARED -fPIC
97
98ifeq ($(VERBOSE),1)
99 Q =
100else
101 Q = @
102endif
103
104# Disable command line variables (CFLAGS) override from top
105# level Makefile (perf), otherwise build Makefile will get
106# the same command line setup.
107MAKEOVERRIDES=
108
109all:
110
111export srctree OUTPUT CC LD CFLAGS V
112include $(srctree)/tools/build/Makefile.include
113
114SHARED_OBJDIR := $(OUTPUT)sharedobjs/
115STATIC_OBJDIR := $(OUTPUT)staticobjs/
116BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o
117BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o
118BPF_HELPER_DEFS := $(OUTPUT)bpf_helper_defs.h
119BPF_GENERATED := $(BPF_HELPER_DEFS)
120
121LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
122LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
123PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
124
125TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
126
127GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \
128 cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
129 sed 's/\[.*\]//' | \
130 awk '/GLOBAL/ && /DEFAULT && !/UND|ABS/ {print $$NF}' | \
131 sort -u | wc -l)
132VERSIONED_SYM_COUNT = $(shell readelf --dyn-syms --wide $(OUTPUT)libbpf.so | \
133 sed 's/\[.*\]//' | \
134 awk '/GLOBAL/ && /DEFAULT/ && !/UND|ABS/ {print $$NF}' | \
135 grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
136
137CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
138
139all: fixdep
140 $(Q)$(MAKE) all_cmd
141
142all_cmd: $(CMD_TARGETS) check
143
144$(BPF_IN_SHARED): force $(BPF_GENERATED)
145 @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
146 (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
147 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
148 @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
149 (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
150 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf_common.h' differs from latest version at 'include/uapi/linux/bpf_common.h'" >&2 )) || true
151 @(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \
152 (diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \
153 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'" >&2 )) || true
154 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
155
156$(BPF_IN_STATIC): force $(BPF_GENERATED)
157 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR)
158
159$(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h
160 $(QUIET_GEN)$(srctree)/scripts/bpf_doc.py --header \
161 --file $(srctree)/tools/include/uapi/linux/bpf.h > $(BPF_HELPER_DEFS)
162
163$(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
164
165$(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED) $(VERSION_SCRIPT)
166 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) \
167 --shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
168 -Wl,--version-script=$(VERSION_SCRIPT) $< -lelf -lz -o $@
169 @ln -sf $(@F) $(OUTPUT)libbpf.so
170 @ln -sf $(@F) $(OUTPUT)libbpf.so.$(LIBBPF_MAJOR_VERSION)
171
172$(OUTPUT)libbpf.a: $(BPF_IN_STATIC)
173 $(QUIET_LINK)$(RM) -f $@; $(AR) rcs $@ $^
174
175$(OUTPUT)libbpf.pc:
176 $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
177 -e "s|@LIBDIR@|$(libdir_SQ)|" \
178 -e "s|@VERSION@|$(LIBBPF_VERSION)|" \
179 < libbpf.pc.template > $@
180
181check: check_abi check_version
182
183check_abi: $(OUTPUT)libbpf.so $(VERSION_SCRIPT)
184 @if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
185 echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \
186 "($(GLOBAL_SYM_COUNT)) does NOT match with num of" \
187 "versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \
188 "Please make sure all LIBBPF_API symbols are" \
189 "versioned in $(VERSION_SCRIPT)." >&2; \
190 readelf -s --wide $(BPF_IN_SHARED) | \
191 cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
192 sed 's/\[.*\]//' | \
193 awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'| \
194 sort -u > $(OUTPUT)libbpf_global_syms.tmp; \
195 readelf --dyn-syms --wide $(OUTPUT)libbpf.so | \
196 sed 's/\[.*\]//' | \
197 awk '/GLOBAL/ && /DEFAULT/ && !/UND|ABS/ {print $$NF}'| \
198 grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \
199 sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \
200 diff -u $(OUTPUT)libbpf_global_syms.tmp \
201 $(OUTPUT)libbpf_versioned_syms.tmp; \
202 rm $(OUTPUT)libbpf_global_syms.tmp \
203 $(OUTPUT)libbpf_versioned_syms.tmp; \
204 exit 1; \
205 fi
206
207HDR_MAJ_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MAJOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3)
208HDR_MIN_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MINOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3)
209
210check_version: $(VERSION_SCRIPT) libbpf_version.h
211 @if [ "$(HDR_MAJ_VERSION)" != "$(LIBBPF_MAJOR_VERSION)" ]; then \
212 echo "Error: libbpf major version mismatch detected: " \
213 "'$(HDR_MAJ_VERSION)' != '$(LIBBPF_MAJOR_VERSION)'" >&2; \
214 exit 1; \
215 fi
216 @if [ "$(HDR_MIN_VERSION)" != "$(LIBBPF_MINOR_VERSION)" ]; then \
217 echo "Error: libbpf minor version mismatch detected: " \
218 "'$(HDR_MIN_VERSION)' != '$(LIBBPF_MINOR_VERSION)'" >&2; \
219 exit 1; \
220 fi
221
222define do_install_mkdir
223 if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
224 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
225 fi
226endef
227
228define do_install
229 if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
230 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
231 fi; \
232 $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
233endef
234
235install_lib: all_cmd
236 $(call QUIET_INSTALL, $(LIB_TARGET)) \
237 $(call do_install_mkdir,$(libdir_SQ)); \
238 cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ)
239
240SRC_HDRS := bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h \
241 bpf_helpers.h bpf_tracing.h bpf_endian.h bpf_core_read.h \
242 skel_internal.h libbpf_version.h usdt.bpf.h
243GEN_HDRS := $(BPF_GENERATED)
244
245INSTALL_PFX := $(DESTDIR)$(prefix)/include/bpf
246INSTALL_SRC_HDRS := $(addprefix $(INSTALL_PFX)/, $(SRC_HDRS))
247INSTALL_GEN_HDRS := $(addprefix $(INSTALL_PFX)/, $(notdir $(GEN_HDRS)))
248
249$(INSTALL_SRC_HDRS): $(INSTALL_PFX)/%.h: %.h
250 $(call QUIET_INSTALL, $@) \
251 $(call do_install,$<,$(prefix)/include/bpf,644)
252
253$(INSTALL_GEN_HDRS): $(INSTALL_PFX)/%.h: $(OUTPUT)%.h
254 $(call QUIET_INSTALL, $@) \
255 $(call do_install,$<,$(prefix)/include/bpf,644)
256
257install_headers: $(BPF_GENERATED) $(INSTALL_SRC_HDRS) $(INSTALL_GEN_HDRS)
258 $(call QUIET_INSTALL, libbpf_headers)
259
260install_pkgconfig: $(PC_FILE)
261 $(call QUIET_INSTALL, $(PC_FILE)) \
262 $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
263
264install: install_lib install_pkgconfig install_headers
265
266clean:
267 $(call QUIET_CLEAN, libbpf) $(RM) -rf $(CMD_TARGETS) \
268 *~ .*.d .*.cmd LIBBPF-CFLAGS $(BPF_GENERATED) \
269 $(SHARED_OBJDIR) $(STATIC_OBJDIR) \
270 $(addprefix $(OUTPUT), \
271 *.o *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) *.pc)
272
273PHONY += force cscope tags check check_abi check_version
274force:
275
276cscope:
277 ls *.c *.h > cscope.files
278 cscope -b -q -I $(srctree)/include -f cscope.out
279
280tags:
281 $(RM) -f TAGS tags
282 ls *.c *.h | xargs $(TAGS_PROG) -a
283
284# Declare the contents of the .PHONY variable as phony. We keep that
285# information in a variable so we can use it in if_changed and friends.
286.PHONY: $(PHONY)
287
288# Delete partially updated (corrupted) files on error
289.DELETE_ON_ERROR:
290
291help:
292 @echo 'libbpf common targets:'
293 @echo ' HINT: use "V=1" to enable verbose build'
294 @echo ' all - build libraries and pkgconfig'
295 @echo ' clean - remove all generated files'
296 @echo ' check - check ABI and version info'
297 @echo ''
298 @echo 'libbpf install targets:'
299 @echo ' HINT: use "prefix"(defaults to "/usr/local") or "DESTDIR" (defaults to "/")'
300 @echo ' to adjust target destination, e.g. "make prefix=/usr/local install"'
301 @echo ' install - build and install all headers, libraries and pkgconfig'
302 @echo ' install_headers - install only headers to include/bpf'
303 @echo ''
304 @echo 'libbpf make targets:'
305 @echo ' tags - use ctags to make tag information for source code browsing'
306 @echo ' cscope - use cscope to make interactive source code browsing database'
1# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2# Most of this file is copied from tools/lib/traceevent/Makefile
3
4LIBBPF_VERSION := $(shell \
5 grep -oE '^LIBBPF_([0-9.]+)' libbpf.map | \
6 sort -rV | head -n1 | cut -d'_' -f2)
7LIBBPF_MAJOR_VERSION := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
8
9MAKEFLAGS += --no-print-directory
10
11# This will work when bpf is built in tools env. where srctree
12# isn't set and when invoked from selftests build, where srctree
13# is a ".". building_out_of_srctree is undefined for in srctree
14# builds
15ifndef building_out_of_srctree
16srctree := $(patsubst %/,%,$(dir $(CURDIR)))
17srctree := $(patsubst %/,%,$(dir $(srctree)))
18srctree := $(patsubst %/,%,$(dir $(srctree)))
19#$(info Determined 'srctree' to be $(srctree))
20endif
21
22INSTALL = install
23
24# Use DESTDIR for installing into a different root directory.
25# This is useful for building a package. The program will be
26# installed in this directory as if it was the root directory.
27# Then the build tool can move it later.
28DESTDIR ?=
29DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
30
31include $(srctree)/tools/scripts/Makefile.arch
32
33ifeq ($(LP64), 1)
34 libdir_relative = lib64
35else
36 libdir_relative = lib
37endif
38
39prefix ?= /usr/local
40libdir = $(prefix)/$(libdir_relative)
41man_dir = $(prefix)/share/man
42man_dir_SQ = '$(subst ','\'',$(man_dir))'
43
44export man_dir man_dir_SQ INSTALL
45export DESTDIR DESTDIR_SQ
46
47include $(srctree)/tools/scripts/Makefile.include
48
49# copy a bit from Linux kbuild
50
51ifeq ("$(origin V)", "command line")
52 VERBOSE = $(V)
53endif
54ifndef VERBOSE
55 VERBOSE = 0
56endif
57
58FEATURE_USER = .libbpf
59FEATURE_TESTS = libelf libelf-mmap bpf reallocarray cxx
60FEATURE_DISPLAY = libelf bpf
61
62INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi
63FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES)
64
65check_feat := 1
66NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help
67ifdef MAKECMDGOALS
68ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
69 check_feat := 0
70endif
71endif
72
73ifeq ($(check_feat),1)
74ifeq ($(FEATURES_DUMP),)
75include $(srctree)/tools/build/Makefile.feature
76else
77include $(FEATURES_DUMP)
78endif
79endif
80
81export prefix libdir src obj
82
83# Shell quotes
84libdir_SQ = $(subst ','\'',$(libdir))
85libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
86
87OBJ = $@
88N =
89
90LIB_TARGET = libbpf.a libbpf.so.$(LIBBPF_VERSION)
91LIB_FILE = libbpf.a libbpf.so*
92PC_FILE = libbpf.pc
93
94# Set compile option CFLAGS
95ifdef EXTRA_CFLAGS
96 CFLAGS := $(EXTRA_CFLAGS)
97else
98 CFLAGS := -g -Wall
99endif
100
101ifeq ($(feature-libelf-mmap), 1)
102 override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT
103endif
104
105ifeq ($(feature-reallocarray), 0)
106 override CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
107endif
108
109# Append required CFLAGS
110override CFLAGS += $(EXTRA_WARNINGS)
111override CFLAGS += -Werror -Wall
112override CFLAGS += -fPIC
113override CFLAGS += $(INCLUDES)
114override CFLAGS += -fvisibility=hidden
115override CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
116
117# flags specific for shared library
118SHLIB_FLAGS := -DSHARED
119
120ifeq ($(VERBOSE),1)
121 Q =
122else
123 Q = @
124endif
125
126# Disable command line variables (CFLAGS) override from top
127# level Makefile (perf), otherwise build Makefile will get
128# the same command line setup.
129MAKEOVERRIDES=
130
131all:
132
133export srctree OUTPUT CC LD CFLAGS V
134include $(srctree)/tools/build/Makefile.include
135
136SHARED_OBJDIR := $(OUTPUT)sharedobjs/
137STATIC_OBJDIR := $(OUTPUT)staticobjs/
138BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o
139BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o
140VERSION_SCRIPT := libbpf.map
141
142LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
143LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
144PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
145
146GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \
147 cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
148 awk '/GLOBAL/ && /DEFAULT && !/UND/ {print $$8}' | \
149 sort -u | wc -l)
150VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \
151 grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
152
153CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
154
155CXX_TEST_TARGET = $(OUTPUT)test_libbpf
156
157ifeq ($(feature-cxx), 1)
158 CMD_TARGETS += $(CXX_TEST_TARGET)
159endif
160
161TARGETS = $(CMD_TARGETS)
162
163all: fixdep
164 $(Q)$(MAKE) all_cmd
165
166all_cmd: $(CMD_TARGETS) check
167
168$(BPF_IN_SHARED): force elfdep bpfdep
169 @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
170 (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
171 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
172 @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
173 (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
174 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf_common.h' differs from latest version at 'include/uapi/linux/bpf_common.h'" >&2 )) || true
175 @(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \
176 (diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \
177 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true
178 @(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \
179 (diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \
180 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h'" >&2 )) || true
181 @(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \
182 (diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \
183 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'" >&2 )) || true
184 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
185
186$(BPF_IN_STATIC): force elfdep bpfdep
187 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR)
188
189$(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
190
191$(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN_SHARED)
192 $(QUIET_LINK)$(CC) --shared -Wl,-soname,libbpf.so.$(LIBBPF_MAJOR_VERSION) \
193 -Wl,--version-script=$(VERSION_SCRIPT) $^ -lelf -o $@
194 @ln -sf $(@F) $(OUTPUT)libbpf.so
195 @ln -sf $(@F) $(OUTPUT)libbpf.so.$(LIBBPF_MAJOR_VERSION)
196
197$(OUTPUT)libbpf.a: $(BPF_IN_STATIC)
198 $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
199
200$(OUTPUT)test_libbpf: test_libbpf.cpp $(OUTPUT)libbpf.a
201 $(QUIET_LINK)$(CXX) $(INCLUDES) $^ -lelf -o $@
202
203$(OUTPUT)libbpf.pc:
204 $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
205 -e "s|@LIBDIR@|$(libdir_SQ)|" \
206 -e "s|@VERSION@|$(LIBBPF_VERSION)|" \
207 < libbpf.pc.template > $@
208
209check: check_abi
210
211check_abi: $(OUTPUT)libbpf.so
212 @if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
213 echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \
214 "($(GLOBAL_SYM_COUNT)) does NOT match with num of" \
215 "versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \
216 "Please make sure all LIBBPF_API symbols are" \
217 "versioned in $(VERSION_SCRIPT)." >&2; \
218 readelf -s --wide $(OUTPUT)libbpf-in.o | \
219 cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \
220 awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$8}'| \
221 sort -u > $(OUTPUT)libbpf_global_syms.tmp; \
222 readelf -s --wide $(OUTPUT)libbpf.so | \
223 grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \
224 sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \
225 diff -u $(OUTPUT)libbpf_global_syms.tmp \
226 $(OUTPUT)libbpf_versioned_syms.tmp; \
227 rm $(OUTPUT)libbpf_global_syms.tmp \
228 $(OUTPUT)libbpf_versioned_syms.tmp; \
229 exit 1; \
230 fi
231
232define do_install_mkdir
233 if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
234 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
235 fi
236endef
237
238define do_install
239 if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
240 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
241 fi; \
242 $(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR_SQ)$2'
243endef
244
245install_lib: all_cmd
246 $(call QUIET_INSTALL, $(LIB_TARGET)) \
247 $(call do_install_mkdir,$(libdir_SQ)); \
248 cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ)
249
250install_headers:
251 $(call QUIET_INSTALL, headers) \
252 $(call do_install,bpf.h,$(prefix)/include/bpf,644); \
253 $(call do_install,libbpf.h,$(prefix)/include/bpf,644); \
254 $(call do_install,btf.h,$(prefix)/include/bpf,644); \
255 $(call do_install,libbpf_util.h,$(prefix)/include/bpf,644); \
256 $(call do_install,xsk.h,$(prefix)/include/bpf,644);
257
258install_pkgconfig: $(PC_FILE)
259 $(call QUIET_INSTALL, $(PC_FILE)) \
260 $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
261
262install: install_lib install_pkgconfig
263
264### Cleaning rules
265
266config-clean:
267 $(call QUIET_CLEAN, config)
268 $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
269
270clean:
271 $(call QUIET_CLEAN, libbpf) $(RM) -rf $(TARGETS) $(CXX_TEST_TARGET) \
272 *.o *~ *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) .*.d .*.cmd \
273 *.pc LIBBPF-CFLAGS $(SHARED_OBJDIR) $(STATIC_OBJDIR)
274 $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf
275
276
277
278PHONY += force elfdep bpfdep
279force:
280
281elfdep:
282 @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit 1 ; fi
283
284bpfdep:
285 @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit 1 ; fi
286
287# Declare the contents of the .PHONY variable as phony. We keep that
288# information in a variable so we can use it in if_changed and friends.
289.PHONY: $(PHONY)