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1# SPDX-License-Identifier: GPL-2.0-only
2feature_dir := $(srctree)/tools/build/feature
3
4ifneq ($(OUTPUT),)
5 OUTPUT_FEATURES = $(OUTPUT)feature/
6 $(shell mkdir -p $(OUTPUT_FEATURES))
7endif
8
9feature_check = $(eval $(feature_check_code))
10define feature_check_code
11 feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CC="$(CC)" CXX="$(CXX)" CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
12endef
13
14feature_set = $(eval $(feature_set_code))
15define feature_set_code
16 feature-$(1) := 1
17endef
18
19#
20# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
21#
22
23#
24# Note that this is not a complete list of all feature tests, just
25# those that are typically built on a fully configured system.
26#
27# [ Feature tests not mentioned here have to be built explicitly in
28# the rule that uses them - an example for that is the 'bionic'
29# feature check. ]
30#
31FEATURE_TESTS_BASIC := \
32 backtrace \
33 dwarf \
34 dwarf_getlocations \
35 eventfd \
36 fortify-source \
37 get_current_dir_name \
38 gettid \
39 glibc \
40 libbfd \
41 libbfd-buildid \
42 libcap \
43 libelf \
44 libelf-getphdrnum \
45 libelf-gelf_getnote \
46 libelf-getshdrstrndx \
47 libnuma \
48 numa_num_possible_cpus \
49 libperl \
50 libpython \
51 libslang \
52 libslang-include-subdir \
53 libtraceevent \
54 libtracefs \
55 libcrypto \
56 libunwind \
57 pthread-attr-setaffinity-np \
58 pthread-barrier \
59 reallocarray \
60 stackprotector-all \
61 timerfd \
62 libdw-dwarf-unwind \
63 zlib \
64 lzma \
65 get_cpuid \
66 bpf \
67 sched_getcpu \
68 sdt \
69 setns \
70 libaio \
71 libzstd \
72 disassembler-four-args \
73 disassembler-init-styled \
74 file-handle
75
76# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
77# of all feature tests
78FEATURE_TESTS_EXTRA := \
79 bionic \
80 compile-32 \
81 compile-x32 \
82 cplus-demangle \
83 gtk2 \
84 gtk2-infobar \
85 hello \
86 libbabeltrace \
87 libbfd-liberty \
88 libbfd-liberty-z \
89 libopencsd \
90 libunwind-x86 \
91 libunwind-x86_64 \
92 libunwind-arm \
93 libunwind-aarch64 \
94 libunwind-debug-frame \
95 libunwind-debug-frame-arm \
96 libunwind-debug-frame-aarch64 \
97 cxx \
98 llvm \
99 llvm-version \
100 clang \
101 libbpf \
102 libbpf-btf__load_from_kernel_by_id \
103 libbpf-bpf_prog_load \
104 libbpf-bpf_object__next_program \
105 libbpf-bpf_object__next_map \
106 libbpf-bpf_program__set_insns \
107 libbpf-bpf_create_map \
108 libpfm4 \
109 libdebuginfod \
110 clang-bpf-co-re
111
112
113FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
114
115ifeq ($(FEATURE_TESTS),all)
116 FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
117endif
118
119FEATURE_DISPLAY ?= \
120 dwarf \
121 dwarf_getlocations \
122 glibc \
123 libbfd \
124 libbfd-buildid \
125 libcap \
126 libelf \
127 libnuma \
128 numa_num_possible_cpus \
129 libperl \
130 libpython \
131 libcrypto \
132 libunwind \
133 libdw-dwarf-unwind \
134 zlib \
135 lzma \
136 get_cpuid \
137 bpf \
138 libaio \
139 libzstd
140
141#
142# Declare group members of a feature to display the logical OR of the detection
143# result instead of each member result.
144#
145FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty libbfd-liberty-z
146
147# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
148# If in the future we need per-feature checks/flags for features not
149# mentioned in this list we need to refactor this ;-).
150set_test_all_flags = $(eval $(set_test_all_flags_code))
151define set_test_all_flags_code
152 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
153 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
154endef
155
156$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
157
158#
159# Special fast-path for the 'all features are available' case:
160#
161$(call feature_check,all,$(MSG))
162
163#
164# Just in case the build freshly failed, make sure we print the
165# feature matrix:
166#
167ifeq ($(feature-all), 1)
168 #
169 # test-all.c passed - just set all the core feature flags to 1:
170 #
171 $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
172 #
173 # test-all.c does not comprise these tests, so we need to
174 # for this case to get features proper values
175 #
176 $(call feature_check,compile-32)
177 $(call feature_check,compile-x32)
178 $(call feature_check,bionic)
179 $(call feature_check,libbabeltrace)
180else
181 $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
182endif
183
184#
185# Print the result of the feature test:
186#
187feature_print_status = $(eval $(feature_print_status_code))
188
189feature_group = $(eval $(feature_gen_group)) $(GROUP)
190
191define feature_gen_group
192 GROUP := $(1)
193 ifneq ($(feature_verbose),1)
194 GROUP += $(FEATURE_GROUP_MEMBERS-$(1))
195 endif
196endef
197
198define feature_print_status_code
199 ifneq (,$(filter 1,$(foreach feat,$(call feature_group,$(feat)),$(feature-$(feat)))))
200 MSG = $(shell printf '...%40s: [ \033[32mon\033[m ]' $(1))
201 else
202 MSG = $(shell printf '...%40s: [ \033[31mOFF\033[m ]' $(1))
203 endif
204endef
205
206feature_print_text = $(eval $(feature_print_text_code))
207define feature_print_text_code
208 MSG = $(shell printf '...%40s: %s' $(1) $(2))
209endef
210
211#
212# generates feature value assignment for name, like:
213# $(call feature_assign,dwarf) == feature-dwarf=1
214#
215feature_assign = feature-$(1)=$(feature-$(1))
216
217FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
218FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
219
220feature_dump_check = $(eval $(feature_dump_check_code))
221define feature_dump_check_code
222 ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
223 $(2) := 1
224 endif
225endef
226
227#
228# First check if any test from FEATURE_DISPLAY
229# and set feature_display := 1 if it does
230$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
231
232#
233# Now also check if any other test changed,
234# so we force FEATURE-DUMP generation
235$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
236
237# The $(feature_display) controls the default detection message
238# output. It's set if:
239# - detected features differes from stored features from
240# last build (in $(FEATURE_DUMP_FILENAME) file)
241# - one of the $(FEATURE_DISPLAY) is not detected
242# - VF is enabled
243
244ifeq ($(feature_dump_changed),1)
245 $(shell rm -f $(FEATURE_DUMP_FILENAME))
246 $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
247endif
248
249feature_display_check = $(eval $(feature_check_display_code))
250define feature_check_display_code
251 ifneq ($(feature-$(1)), 1)
252 feature_display := 1
253 endif
254endef
255
256$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
257
258ifeq ($(VF),1)
259 feature_display := 1
260 feature_verbose := 1
261endif
262
263ifneq ($(feature_verbose),1)
264 #
265 # Determine the features to omit from the displayed message, as only the
266 # logical OR of the detection result will be shown.
267 #
268 FEATURE_OMIT := $(foreach feat,$(FEATURE_DISPLAY),$(FEATURE_GROUP_MEMBERS-$(feat)))
269endif
270
271feature_display_entries = $(eval $(feature_display_entries_code))
272define feature_display_entries_code
273 ifeq ($(feature_display),1)
274 $$(info )
275 $$(info Auto-detecting system features:)
276 $(foreach feat,$(filter-out $(FEATURE_OMIT),$(FEATURE_DISPLAY)),$(call feature_print_status,$(feat),) $$(info $(MSG)))
277 endif
278
279 ifeq ($(feature_verbose),1)
280 $(eval TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)))
281 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),) $$(info $(MSG)))
282 endif
283endef
284
285ifeq ($(FEATURE_DISPLAY_DEFERRED),)
286 $(call feature_display_entries)
287 $(info )
288endif
1# SPDX-License-Identifier: GPL-2.0-only
2feature_dir := $(srctree)/tools/build/feature
3
4ifneq ($(OUTPUT),)
5 OUTPUT_FEATURES = $(OUTPUT)feature/
6 $(shell mkdir -p $(OUTPUT_FEATURES))
7endif
8
9feature_check = $(eval $(feature_check_code))
10define feature_check_code
11 feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CC="$(CC)" CXX="$(CXX)" CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
12endef
13
14feature_set = $(eval $(feature_set_code))
15define feature_set_code
16 feature-$(1) := 1
17endef
18
19#
20# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
21#
22
23#
24# Note that this is not a complete list of all feature tests, just
25# those that are typically built on a fully configured system.
26#
27# [ Feature tests not mentioned here have to be built explicitly in
28# the rule that uses them - an example for that is the 'bionic'
29# feature check. ]
30#
31FEATURE_TESTS_BASIC := \
32 backtrace \
33 libdw \
34 eventfd \
35 fortify-source \
36 get_current_dir_name \
37 gettid \
38 glibc \
39 libbfd \
40 libbfd-buildid \
41 libcap \
42 libelf \
43 libelf-getphdrnum \
44 libelf-gelf_getnote \
45 libelf-getshdrstrndx \
46 libnuma \
47 numa_num_possible_cpus \
48 libperl \
49 libpython \
50 libslang \
51 libslang-include-subdir \
52 libtraceevent \
53 libtracefs \
54 libcpupower \
55 libcrypto \
56 libunwind \
57 pthread-attr-setaffinity-np \
58 pthread-barrier \
59 reallocarray \
60 stackprotector-all \
61 timerfd \
62 zlib \
63 lzma \
64 get_cpuid \
65 bpf \
66 scandirat \
67 sched_getcpu \
68 sdt \
69 setns \
70 libaio \
71 libzstd \
72 disassembler-four-args \
73 disassembler-init-styled \
74 file-handle
75
76# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
77# of all feature tests
78FEATURE_TESTS_EXTRA := \
79 bionic \
80 compile-32 \
81 compile-x32 \
82 cplus-demangle \
83 cxa-demangle \
84 gtk2 \
85 gtk2-infobar \
86 hello \
87 libbabeltrace \
88 libcapstone \
89 libbfd-liberty \
90 libbfd-liberty-z \
91 libopencsd \
92 cxx \
93 llvm \
94 clang \
95 libbpf \
96 libbpf-btf__load_from_kernel_by_id \
97 libbpf-bpf_prog_load \
98 libbpf-bpf_object__next_program \
99 libbpf-bpf_object__next_map \
100 libbpf-bpf_program__set_insns \
101 libbpf-bpf_create_map \
102 libpfm4 \
103 libdebuginfod \
104 clang-bpf-co-re
105
106
107FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
108
109ifeq ($(FEATURE_TESTS),all)
110 FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
111endif
112
113FEATURE_DISPLAY ?= \
114 libdw \
115 glibc \
116 libbfd \
117 libbfd-buildid \
118 libcap \
119 libelf \
120 libnuma \
121 numa_num_possible_cpus \
122 libperl \
123 libpython \
124 libcrypto \
125 libunwind \
126 libcapstone \
127 llvm-perf \
128 zlib \
129 lzma \
130 get_cpuid \
131 bpf \
132 libaio \
133 libzstd
134
135#
136# Declare group members of a feature to display the logical OR of the detection
137# result instead of each member result.
138#
139FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty libbfd-liberty-z
140
141#
142# Declare list of feature dependency packages that provide pkg-config files.
143#
144FEATURE_PKG_CONFIG ?= \
145 libtraceevent \
146 libtracefs
147
148feature_pkg_config = $(eval $(feature_pkg_config_code))
149define feature_pkg_config_code
150 FEATURE_CHECK_CFLAGS-$(1) := $(shell $(PKG_CONFIG) --cflags $(1) 2>/dev/null)
151 FEATURE_CHECK_LDFLAGS-$(1) := $(shell $(PKG_CONFIG) --libs $(1) 2>/dev/null)
152endef
153
154# Set FEATURE_CHECK_(C|LD)FLAGS-$(package) for packages using pkg-config.
155ifneq ($(PKG_CONFIG),)
156 $(foreach package,$(FEATURE_PKG_CONFIG),$(call feature_pkg_config,$(package)))
157endif
158
159# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
160# If in the future we need per-feature checks/flags for features not
161# mentioned in this list we need to refactor this ;-).
162set_test_all_flags = $(eval $(set_test_all_flags_code))
163define set_test_all_flags_code
164 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
165 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
166endef
167
168$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
169
170#
171# Special fast-path for the 'all features are available' case:
172#
173$(call feature_check,all,$(MSG))
174
175#
176# Just in case the build freshly failed, make sure we print the
177# feature matrix:
178#
179ifeq ($(feature-all), 1)
180 #
181 # test-all.c passed - just set all the core feature flags to 1:
182 #
183 $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
184 #
185 # test-all.c does not comprise these tests, so we need to
186 # for this case to get features proper values
187 #
188 $(call feature_check,compile-32)
189 $(call feature_check,compile-x32)
190 $(call feature_check,bionic)
191 $(call feature_check,libbabeltrace)
192else
193 $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
194endif
195
196#
197# Print the result of the feature test:
198#
199feature_print_status = $(eval $(feature_print_status_code))
200
201feature_group = $(eval $(feature_gen_group)) $(GROUP)
202
203define feature_gen_group
204 GROUP := $(1)
205 ifneq ($(feature_verbose),1)
206 GROUP += $(FEATURE_GROUP_MEMBERS-$(1))
207 endif
208endef
209
210define feature_print_status_code
211 ifneq (,$(filter 1,$(foreach feat,$(call feature_group,$(feat)),$(feature-$(feat)))))
212 MSG = $(shell printf '...%40s: [ \033[32mon\033[m ]' $(1))
213 else
214 MSG = $(shell printf '...%40s: [ \033[31mOFF\033[m ]' $(1))
215 endif
216endef
217
218feature_print_text = $(eval $(feature_print_text_code))
219define feature_print_text_code
220 MSG = $(shell printf '...%40s: %s' $(1) $(2))
221endef
222
223#
224# generates feature value assignment for name, like:
225# $(call feature_assign,libdw) == feature-libdw=1
226#
227feature_assign = feature-$(1)=$(feature-$(1))
228
229FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
230FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
231
232feature_dump_check = $(eval $(feature_dump_check_code))
233define feature_dump_check_code
234 ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
235 $(2) := 1
236 endif
237endef
238
239#
240# First check if any test from FEATURE_DISPLAY
241# and set feature_display := 1 if it does
242$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
243
244#
245# Now also check if any other test changed,
246# so we force FEATURE-DUMP generation
247$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
248
249# The $(feature_display) controls the default detection message
250# output. It's set if:
251# - detected features differes from stored features from
252# last build (in $(FEATURE_DUMP_FILENAME) file)
253# - one of the $(FEATURE_DISPLAY) is not detected
254# - VF is enabled
255
256ifeq ($(feature_dump_changed),1)
257 $(shell rm -f $(FEATURE_DUMP_FILENAME))
258 $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
259endif
260
261feature_display_check = $(eval $(feature_check_display_code))
262define feature_check_display_code
263 ifneq ($(feature-$(1)), 1)
264 feature_display := 1
265 endif
266endef
267
268$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
269
270ifeq ($(VF),1)
271 feature_display := 1
272 feature_verbose := 1
273endif
274
275ifneq ($(feature_verbose),1)
276 #
277 # Determine the features to omit from the displayed message, as only the
278 # logical OR of the detection result will be shown.
279 #
280 FEATURE_OMIT := $(foreach feat,$(FEATURE_DISPLAY),$(FEATURE_GROUP_MEMBERS-$(feat)))
281endif
282
283feature_display_entries = $(eval $(feature_display_entries_code))
284define feature_display_entries_code
285 ifeq ($(feature_display),1)
286 $$(info )
287 $$(info Auto-detecting system features:)
288 $(foreach feat,$(filter-out $(FEATURE_OMIT),$(FEATURE_DISPLAY)),$(call feature_print_status,$(feat),) $$(info $(MSG)))
289 endif
290
291 ifeq ($(feature_verbose),1)
292 $(eval TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)))
293 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),) $$(info $(MSG)))
294 endif
295endef
296
297ifeq ($(FEATURE_DISPLAY_DEFERRED),)
298 $(call feature_display_entries)
299 $(info )
300endif