Makefile (e700ac213a0f793fb4f83098413303e3dd080892) Makefile (929bef467771d4d5a22b9edb51a2025dc0e49113)
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 = $(abs_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)
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 = $(abs_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 := $(firstword $(subst ., ,$(LIBBPF_VERSION)))
11LIBBPF_MAJOR_VERSION := $(word 1,$(subst ., ,$(LIBBPF_VERSION)))
12LIBBPF_MINOR_VERSION := $(word 2,$(subst ., ,$(LIBBPF_VERSION)))
12
13MAKEFLAGS += --no-print-directory
14
15# This will work when bpf is built in tools env. where srctree
16# isn't set and when invoked from selftests build, where srctree
17# is a ".". building_out_of_srctree is undefined for in srctree
18# builds
19ifndef building_out_of_srctree

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54
55ifeq ("$(origin V)", "command line")
56 VERBOSE = $(V)
57endif
58ifndef VERBOSE
59 VERBOSE = 0
60endif
61
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

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55
56ifeq ("$(origin V)", "command line")
57 VERBOSE = $(V)
58endif
59ifndef VERBOSE
60 VERBOSE = 0
61endif
62
62INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi
63INCLUDES = -I$(if $(OUTPUT),$(OUTPUT),.) \
64 -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi
63
64export prefix libdir src obj
65
66# Shell quotes
67libdir_SQ = $(subst ','\'',$(libdir))
68libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
69
70OBJ = $@

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107export srctree OUTPUT CC LD CFLAGS V
108include $(srctree)/tools/build/Makefile.include
109
110SHARED_OBJDIR := $(OUTPUT)sharedobjs/
111STATIC_OBJDIR := $(OUTPUT)staticobjs/
112BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o
113BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o
114BPF_HELPER_DEFS := $(OUTPUT)bpf_helper_defs.h
65
66export prefix libdir src obj
67
68# Shell quotes
69libdir_SQ = $(subst ','\'',$(libdir))
70libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
71
72OBJ = $@

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109export srctree OUTPUT CC LD CFLAGS V
110include $(srctree)/tools/build/Makefile.include
111
112SHARED_OBJDIR := $(OUTPUT)sharedobjs/
113STATIC_OBJDIR := $(OUTPUT)staticobjs/
114BPF_IN_SHARED := $(SHARED_OBJDIR)libbpf-in.o
115BPF_IN_STATIC := $(STATIC_OBJDIR)libbpf-in.o
116BPF_HELPER_DEFS := $(OUTPUT)bpf_helper_defs.h
117BPF_GENERATED := $(BPF_HELPER_DEFS)
115
116LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
117LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
118PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
119
120TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
121
122GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \

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131
132CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
133
134all: fixdep
135 $(Q)$(MAKE) all_cmd
136
137all_cmd: $(CMD_TARGETS) check
138
118
119LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
120LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE))
121PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE))
122
123TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags)
124
125GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \

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134
135CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
136
137all: fixdep
138 $(Q)$(MAKE) all_cmd
139
140all_cmd: $(CMD_TARGETS) check
141
139$(BPF_IN_SHARED): force $(BPF_HELPER_DEFS)
142$(BPF_IN_SHARED): force $(BPF_GENERATED)
140 @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
141 (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
142 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
143 @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
144 (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
145 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
146 @(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \
147 (diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \
148 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true
149 @(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \
150 (diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \
151 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
152 @(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \
153 (diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \
154 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
155 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
156
143 @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
144 (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
145 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
146 @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
147 (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
148 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
149 @(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \
150 (diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \
151 echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true
152 @(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \
153 (diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \
154 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
155 @(test -f ../../include/uapi/linux/if_xdp.h -a -f ../../../include/uapi/linux/if_xdp.h && ( \
156 (diff -B ../../include/uapi/linux/if_xdp.h ../../../include/uapi/linux/if_xdp.h >/dev/null) || \
157 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
158 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
159
157$(BPF_IN_STATIC): force $(BPF_HELPER_DEFS)
160$(BPF_IN_STATIC): force $(BPF_GENERATED)
158 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR)
159
160$(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h
161 $(QUIET_GEN)$(srctree)/scripts/bpf_doc.py --header \
162 --file $(srctree)/tools/include/uapi/linux/bpf.h > $(BPF_HELPER_DEFS)
163
164$(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
165

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174 $(QUIET_LINK)$(RM) -f $@; $(AR) rcs $@ $^
175
176$(OUTPUT)libbpf.pc:
177 $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
178 -e "s|@LIBDIR@|$(libdir_SQ)|" \
179 -e "s|@VERSION@|$(LIBBPF_VERSION)|" \
180 < libbpf.pc.template > $@
181
161 $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(STATIC_OBJDIR)
162
163$(BPF_HELPER_DEFS): $(srctree)/tools/include/uapi/linux/bpf.h
164 $(QUIET_GEN)$(srctree)/scripts/bpf_doc.py --header \
165 --file $(srctree)/tools/include/uapi/linux/bpf.h > $(BPF_HELPER_DEFS)
166
167$(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION)
168

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177 $(QUIET_LINK)$(RM) -f $@; $(AR) rcs $@ $^
178
179$(OUTPUT)libbpf.pc:
180 $(QUIET_GEN)sed -e "s|@PREFIX@|$(prefix)|" \
181 -e "s|@LIBDIR@|$(libdir_SQ)|" \
182 -e "s|@VERSION@|$(LIBBPF_VERSION)|" \
183 < libbpf.pc.template > $@
184
182check: check_abi
185check: check_abi check_version
183
184check_abi: $(OUTPUT)libbpf.so $(VERSION_SCRIPT)
185 @if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
186 echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \
187 "($(GLOBAL_SYM_COUNT)) does NOT match with num of" \
188 "versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \
189 "Please make sure all LIBBPF_API symbols are" \
190 "versioned in $(VERSION_SCRIPT)." >&2; \

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200 sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \
201 diff -u $(OUTPUT)libbpf_global_syms.tmp \
202 $(OUTPUT)libbpf_versioned_syms.tmp; \
203 rm $(OUTPUT)libbpf_global_syms.tmp \
204 $(OUTPUT)libbpf_versioned_syms.tmp; \
205 exit 1; \
206 fi
207
186
187check_abi: $(OUTPUT)libbpf.so $(VERSION_SCRIPT)
188 @if [ "$(GLOBAL_SYM_COUNT)" != "$(VERSIONED_SYM_COUNT)" ]; then \
189 echo "Warning: Num of global symbols in $(BPF_IN_SHARED)" \
190 "($(GLOBAL_SYM_COUNT)) does NOT match with num of" \
191 "versioned symbols in $^ ($(VERSIONED_SYM_COUNT))." \
192 "Please make sure all LIBBPF_API symbols are" \
193 "versioned in $(VERSION_SCRIPT)." >&2; \

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203 sort -u > $(OUTPUT)libbpf_versioned_syms.tmp; \
204 diff -u $(OUTPUT)libbpf_global_syms.tmp \
205 $(OUTPUT)libbpf_versioned_syms.tmp; \
206 rm $(OUTPUT)libbpf_global_syms.tmp \
207 $(OUTPUT)libbpf_versioned_syms.tmp; \
208 exit 1; \
209 fi
210
211HDR_MAJ_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MAJOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3)
212HDR_MIN_VERSION := $(shell grep -oE '^$(pound)define LIBBPF_MINOR_VERSION ([0-9]+)$$' libbpf_version.h | cut -d' ' -f3)
213
214check_version: $(VERSION_SCRIPT) libbpf_version.h
215 @if [ "$(HDR_MAJ_VERSION)" != "$(LIBBPF_MAJOR_VERSION)" ]; then \
216 echo "Error: libbpf major version mismatch detected: " \
217 "'$(HDR_MAJ_VERSION)' != '$(LIBBPF_MAJOR_VERSION)'" >&2; \
218 exit 1; \
219 fi
220 @if [ "$(HDR_MIN_VERSION)" != "$(LIBBPF_MINOR_VERSION)" ]; then \
221 echo "Error: libbpf minor version mismatch detected: " \
222 "'$(HDR_MIN_VERSION)' != '$(LIBBPF_MINOR_VERSION)'" >&2; \
223 exit 1; \
224 fi
225
208define do_install_mkdir
209 if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
210 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
211 fi
212endef
213
214define do_install
215 if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
216 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
217 fi; \
218 $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
219endef
220
221install_lib: all_cmd
222 $(call QUIET_INSTALL, $(LIB_TARGET)) \
223 $(call do_install_mkdir,$(libdir_SQ)); \
224 cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ)
225
226INSTALL_HEADERS = bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h xsk.h \
226define do_install_mkdir
227 if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
228 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
229 fi
230endef
231
232define do_install
233 if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
234 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
235 fi; \
236 $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
237endef
238
239install_lib: all_cmd
240 $(call QUIET_INSTALL, $(LIB_TARGET)) \
241 $(call do_install_mkdir,$(libdir_SQ)); \
242 cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ)
243
244INSTALL_HEADERS = bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h xsk.h \
227 bpf_helpers.h $(BPF_HELPER_DEFS) bpf_tracing.h \
228 bpf_endian.h bpf_core_read.h skel_internal.h
245 bpf_helpers.h $(BPF_GENERATED) bpf_tracing.h \
246 bpf_endian.h bpf_core_read.h skel_internal.h \
247 libbpf_version.h
229
248
230install_headers: $(BPF_HELPER_DEFS)
249install_headers: $(BPF_GENERATED)
231 $(call QUIET_INSTALL, headers) \
232 $(foreach hdr,$(INSTALL_HEADERS), \
233 $(call do_install,$(hdr),$(prefix)/include/bpf,644);)
234
235install_pkgconfig: $(PC_FILE)
236 $(call QUIET_INSTALL, $(PC_FILE)) \
237 $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
238
239install: install_lib install_pkgconfig install_headers
240
241clean:
242 $(call QUIET_CLEAN, libbpf) $(RM) -rf $(CMD_TARGETS) \
250 $(call QUIET_INSTALL, headers) \
251 $(foreach hdr,$(INSTALL_HEADERS), \
252 $(call do_install,$(hdr),$(prefix)/include/bpf,644);)
253
254install_pkgconfig: $(PC_FILE)
255 $(call QUIET_INSTALL, $(PC_FILE)) \
256 $(call do_install,$(PC_FILE),$(libdir_SQ)/pkgconfig,644)
257
258install: install_lib install_pkgconfig install_headers
259
260clean:
261 $(call QUIET_CLEAN, libbpf) $(RM) -rf $(CMD_TARGETS) \
243 *~ .*.d .*.cmd LIBBPF-CFLAGS $(BPF_HELPER_DEFS) \
262 *~ .*.d .*.cmd LIBBPF-CFLAGS $(BPF_GENERATED) \
244 $(SHARED_OBJDIR) $(STATIC_OBJDIR) \
245 $(addprefix $(OUTPUT), \
246 *.o *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) *.pc)
247
263 $(SHARED_OBJDIR) $(STATIC_OBJDIR) \
264 $(addprefix $(OUTPUT), \
265 *.o *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) *.pc)
266
248PHONY += force cscope tags
267PHONY += force cscope tags check check_abi check_version
249force:
250
251cscope:
252 ls *.c *.h > cscope.files
253 cscope -b -q -I $(srctree)/include -f cscope.out
254
255tags:
256 $(RM) -f TAGS tags
257 ls *.c *.h | xargs $(TAGS_PROG) -a
258
259# Declare the contents of the .PHONY variable as phony. We keep that
260# information in a variable so we can use it in if_changed and friends.
261.PHONY: $(PHONY)
262
263# Delete partially updated (corrupted) files on error
264.DELETE_ON_ERROR:
268force:
269
270cscope:
271 ls *.c *.h > cscope.files
272 cscope -b -q -I $(srctree)/include -f cscope.out
273
274tags:
275 $(RM) -f TAGS tags
276 ls *.c *.h | xargs $(TAGS_PROG) -a
277
278# Declare the contents of the .PHONY variable as phony. We keep that
279# information in a variable so we can use it in if_changed and friends.
280.PHONY: $(PHONY)
281
282# Delete partially updated (corrupted) files on error
283.DELETE_ON_ERROR: