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