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 $(MAKE) OUTPUT=$(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) 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, 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 # 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 the complete list 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) $(FEATURE_TESTS_EXTRA) 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 display the logical OR of the detection 148 # result instead of each member result. 149 # 150 FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty libbfd-liberty-z 151 152 # 153 # Declare list of feature dependency packages that provide pkg-config files. 154 # 155 FEATURE_PKG_CONFIG ?= \ 156 libtraceevent \ 157 libtracefs 158 159 feature_pkg_config = $(eval $(feature_pkg_config_code)) 160 define feature_pkg_config_code 161 FEATURE_CHECK_CFLAGS-$(1) := $(shell $(PKG_CONFIG) --cflags $(1) 2>/dev/null) 162 FEATURE_CHECK_LDFLAGS-$(1) := $(shell $(PKG_CONFIG) --libs $(1) 2>/dev/null) 163 endef 164 165 # Set FEATURE_CHECK_(C|LD)FLAGS-$(package) for packages using pkg-config. 166 ifneq ($(PKG_CONFIG),) 167 $(foreach package,$(FEATURE_PKG_CONFIG),$(call feature_pkg_config,$(package))) 168 endif 169 170 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features. 171 # If in the future we need per-feature checks/flags for features not 172 # mentioned in this list we need to refactor this ;-). 173 set_test_all_flags = $(eval $(set_test_all_flags_code)) 174 define set_test_all_flags_code 175 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1)) 176 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1)) 177 endef 178 179 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat))) 180 181 # 182 # Special fast-path for the 'all features are available' case: 183 # 184 $(call feature_check,all,$(MSG)) 185 186 # 187 # Just in case the build freshly failed, make sure we print the 188 # feature matrix: 189 # 190 ifeq ($(feature-all), 1) 191 # 192 # test-all.c passed - just set all the core feature flags to 1: 193 # 194 $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat))) 195 # 196 # test-all.c does not comprise these tests, so we need to 197 # for this case to get features proper values 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),$(call feature_check,$(feat))) 205 endif 206 207 # 208 # Print the result of the feature test: 209 # 210 feature_print_status = $(eval $(feature_print_status_code)) 211 212 feature_group = $(eval $(feature_gen_group)) $(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,$(call feature_group,$(feat)),$(feature-$(feat))))) 223 MSG = $(shell printf '...%40s: [ \033[32mon\033[m ]' $(1)) 224 else 225 MSG = $(shell printf '...%40s: [ \033[31mOFF\033[m ]' $(1)) 226 endif 227 endef 228 229 feature_print_text = $(eval $(feature_print_text_code)) 230 define feature_print_text_code 231 MSG = $(shell printf '...%40s: %s' $(1) $(2)) 232 endef 233 234 # 235 # generates feature value assignment for name, like: 236 # $(call feature_assign,dwarf) == feature-dwarf=1 237 # 238 feature_assign = feature-$(1)=$(feature-$(1)) 239 240 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER) 241 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME)) 242 243 feature_dump_check = $(eval $(feature_dump_check_code)) 244 define feature_dump_check_code 245 ifeq ($(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),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display)) 254 255 # 256 # Now also check if any other test changed, 257 # so we force FEATURE-DUMP generation 258 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed)) 259 260 # The $(feature_display) controls the default detection message 261 # output. It's set if: 262 # - detected features differes from stored features from 263 # last build (in $(FEATURE_DUMP_FILENAME) file) 264 # - one of the $(FEATURE_DISPLAY) is not detected 265 # - VF is enabled 266 267 ifeq ($(feature_dump_changed),1) 268 $(shell rm -f $(FEATURE_DUMP_FILENAME)) 269 $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME))) 270 endif 271 272 feature_display_check = $(eval $(feature_check_display_code)) 273 define feature_check_display_code 274 ifneq ($(feature-$(1)), 1) 275 feature_display := 1 276 endif 277 endef 278 279 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat))) 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 displayed message, as only the 289 # logical OR of the detection result will be shown. 290 # 291 FEATURE_OMIT := $(foreach feat,$(FEATURE_DISPLAY),$(FEATURE_GROUP_MEMBERS-$(feat))) 292 endif 293 294 feature_display_entries = $(eval $(feature_display_entries_code)) 295 define feature_display_entries_code 296 ifeq ($(feature_display),1) 297 $$(info ) 298 $$(info Auto-detecting system features:) 299 $(foreach feat,$(filter-out $(FEATURE_OMIT),$(FEATURE_DISPLAY)),$(call feature_print_status,$(feat),) $$(info $(MSG))) 300 endif 301 302 ifeq ($(feature_verbose),1) 303 $(eval TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))) 304 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),) $$(info $(MSG))) 305 endif 306 endef 307 308 ifeq ($(FEATURE_DISPLAY_DEFERRED),) 309 $(call feature_display_entries) 310 $(info ) 311 endif
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