1 # SPDX-License-Identifier: GPL-2.0-only
2 feature_dir := $(srctree)/tools/build/feature
3
4 ifneq ($(OUTPUT),)
5 OUTPUT_FEATURES = $(OUTPUT)feature/
6 $(shell mkdir -p $(OUTPUT_FEATURES))
7 endif
8
9 feature_check = $(eval $(feature_check_code))
10 define feature_check_code
11 feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUT
12 endef
13
14 feature_set = $(eval $(feature_set_code))
15 define feature_set_code
16 feature-$(1) := 1
17 endef
18
19 #
20 # Build the feature check binaries in parallel
21 #
22
23 #
24 # Note that this is not a complete list of all
25 # those that are typically built on a fully co
26 #
27 # [ Feature tests not mentioned here have to b
28 # the rule that uses them - an example for t
29 # feature check. ]
30 #
31 FEATURE_TESTS_BASIC := \
32 backtrace \
33 dwarf \
34 dwarf_getlocations \
35 dwarf_getcfi \
36 eventfd \
37 fortify-source \
38 get_current_dir_name \
39 gettid \
40 glibc \
41 libbfd \
42 libbfd-buildid \
43 libcap \
44 libelf \
45 libelf-getphdrnum \
46 libelf-gelf_getnote \
47 libelf-getshdrstrndx \
48 libnuma \
49 numa_num_possible_cpus \
50 libperl \
51 libpython \
52 libslang \
53 libslang-include-subdir \
54 libtraceevent \
55 libtracefs \
56 libcrypto \
57 libunwind \
58 pthread-attr-setaffinity-np \
59 pthread-barrier \
60 reallocarray \
61 stackprotector-all \
62 timerfd \
63 libdw-dwarf-unwind \
64 zlib \
65 lzma \
66 get_cpuid \
67 bpf \
68 scandirat \
69 sched_getcpu \
70 sdt \
71 setns \
72 libaio \
73 libzstd \
74 disassembler-four-args \
75 disassembler-init-styled \
76 file-handle
77
78 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is
79 # of all feature tests
80 FEATURE_TESTS_EXTRA := \
81 bionic \
82 compile-32 \
83 compile-x32 \
84 cplus-demangle \
85 cxa-demangle \
86 gtk2 \
87 gtk2-infobar \
88 hello \
89 libbabeltrace \
90 libcapstone \
91 libbfd-liberty \
92 libbfd-liberty-z \
93 libopencsd \
94 libunwind-x86 \
95 libunwind-x86_64 \
96 libunwind-arm \
97 libunwind-aarch64 \
98 libunwind-debug-frame \
99 libunwind-debug-frame-arm \
100 libunwind-debug-frame-aarch64 \
101 cxx \
102 llvm \
103 clang \
104 libbpf \
105 libbpf-btf__load_from_kernel_by_id \
106 libbpf-bpf_prog_load \
107 libbpf-bpf_object__next_program \
108 libbpf-bpf_object__next_map \
109 libbpf-bpf_program__set_insns \
110 libbpf-bpf_create_map \
111 libpfm4 \
112 libdebuginfod \
113 clang-bpf-co-re
114
115
116 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
117
118 ifeq ($(FEATURE_TESTS),all)
119 FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FE
120 endif
121
122 FEATURE_DISPLAY ?= \
123 dwarf \
124 dwarf_getlocations \
125 glibc \
126 libbfd \
127 libbfd-buildid \
128 libcap \
129 libelf \
130 libnuma \
131 numa_num_possible_cpus \
132 libperl \
133 libpython \
134 libcrypto \
135 libunwind \
136 libdw-dwarf-unwind \
137 libcapstone \
138 llvm-perf \
139 zlib \
140 lzma \
141 get_cpuid \
142 bpf \
143 libaio \
144 libzstd
145
146 #
147 # Declare group members of a feature to displa
148 # result instead of each member result.
149 #
150 FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty
151
152 #
153 # Declare list of feature dependency packages
154 #
155 FEATURE_PKG_CONFIG ?= \
156 libtraceevent \
157 libtracefs
158
159 feature_pkg_config = $(eval $(feature_pkg_conf
160 define feature_pkg_config_code
161 FEATURE_CHECK_CFLAGS-$(1) := $(shell $(PKG_C
162 FEATURE_CHECK_LDFLAGS-$(1) := $(shell $(PKG_
163 endef
164
165 # Set FEATURE_CHECK_(C|LD)FLAGS-$(package) for
166 ifneq ($(PKG_CONFIG),)
167 $(foreach package,$(FEATURE_PKG_CONFIG),$(ca
168 endif
169
170 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FE
171 # If in the future we need per-feature checks/
172 # mentioned in this list we need to refactor t
173 set_test_all_flags = $(eval $(set_test_all_fla
174 define set_test_all_flags_code
175 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK
176 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK
177 endef
178
179 $(foreach feat,$(FEATURE_TESTS),$(call set_tes
180
181 #
182 # Special fast-path for the 'all features are
183 #
184 $(call feature_check,all,$(MSG))
185
186 #
187 # Just in case the build freshly failed, make
188 # feature matrix:
189 #
190 ifeq ($(feature-all), 1)
191 #
192 # test-all.c passed - just set all the core
193 #
194 $(foreach feat,$(FEATURE_TESTS),$(call featu
195 #
196 # test-all.c does not comprise these tests,
197 # for this case to get features proper value
198 #
199 $(call feature_check,compile-32)
200 $(call feature_check,compile-x32)
201 $(call feature_check,bionic)
202 $(call feature_check,libbabeltrace)
203 else
204 $(foreach feat,$(FEATURE_TESTS),$(call featu
205 endif
206
207 #
208 # Print the result of the feature test:
209 #
210 feature_print_status = $(eval $(feature_print_
211
212 feature_group = $(eval $(feature_gen_group)) $
213
214 define feature_gen_group
215 GROUP := $(1)
216 ifneq ($(feature_verbose),1)
217 GROUP += $(FEATURE_GROUP_MEMBERS-$(1))
218 endif
219 endef
220
221 define feature_print_status_code
222 ifneq (,$(filter 1,$(foreach feat,$(call fea
223 MSG = $(shell printf '...%40s: [ \033[32mo
224 else
225 MSG = $(shell printf '...%40s: [ \033[31mO
226 endif
227 endef
228
229 feature_print_text = $(eval $(feature_print_te
230 define feature_print_text_code
231 MSG = $(shell printf '...%40s: %s' $(1) $(
232 endef
233
234 #
235 # generates feature value assignment for name,
236 # $(call feature_assign,dwarf) == feature-dw
237 #
238 feature_assign = feature-$(1)=$(feature-$(1))
239
240 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$
241 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_F
242
243 feature_dump_check = $(eval $(feature_dump_che
244 define feature_dump_check_code
245 ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
246 $(2) := 1
247 endif
248 endef
249
250 #
251 # First check if any test from FEATURE_DISPLAY
252 # and set feature_display := 1 if it does
253 $(foreach feat,$(FEATURE_DISPLAY),$(call featu
254
255 #
256 # Now also check if any other test changed,
257 # so we force FEATURE-DUMP generation
258 $(foreach feat,$(FEATURE_TESTS),$(call feature
259
260 # The $(feature_display) controls the default
261 # output. It's set if:
262 # - detected features differes from stored fea
263 # last build (in $(FEATURE_DUMP_FILENAME) fi
264 # - one of the $(FEATURE_DISPLAY) is not detec
265 # - VF is enabled
266
267 ifeq ($(feature_dump_changed),1)
268 $(shell rm -f $(FEATURE_DUMP_FILENAME))
269 $(foreach feat,$(FEATURE_TESTS),$(shell echo
270 endif
271
272 feature_display_check = $(eval $(feature_check
273 define feature_check_display_code
274 ifneq ($(feature-$(1)), 1)
275 feature_display := 1
276 endif
277 endef
278
279 $(foreach feat,$(FEATURE_DISPLAY),$(call featu
280
281 ifeq ($(VF),1)
282 feature_display := 1
283 feature_verbose := 1
284 endif
285
286 ifneq ($(feature_verbose),1)
287 #
288 # Determine the features to omit from the di
289 # logical OR of the detection result will be
290 #
291 FEATURE_OMIT := $(foreach feat,$(FEATURE_DIS
292 endif
293
294 feature_display_entries = $(eval $(feature_dis
295 define feature_display_entries_code
296 ifeq ($(feature_display),1)
297 $$(info )
298 $$(info Auto-detecting system features:)
299 $(foreach feat,$(filter-out $(FEATURE_OMIT
300 endif
301
302 ifeq ($(feature_verbose),1)
303 $(eval TMP := $(filter-out $(FEATURE_DISPL
304 $(foreach feat,$(TMP),$(call feature_print
305 endif
306 endef
307
308 ifeq ($(FEATURE_DISPLAY_DEFERRED),)
309 $(call feature_display_entries)
310 $(info )
311 endif
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