tools/build/Makefile.feature

   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          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
 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          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 #
 148 FEATURE_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 ;-).
 153 set_test_all_flags = $(eval $(set_test_all_flags_code))
 154 define set_test_all_flags_code
 155   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 156   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 157 endef
 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 #
 170 ifeq ($(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)
 183 else
 184   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 185 endif
 186
 187 #
 188 # Print the result of the feature test:
 189 #
 190 feature_print_status = $(eval $(feature_print_status_code))
 191
 192 feature_group = $(eval $(feature_gen_group)) $(GROUP)
 193
 194 define feature_gen_group
 195   GROUP := $(1)
 196   ifneq ($(feature_verbose),1)
 197     GROUP += $(FEATURE_GROUP_MEMBERS-$(1))
 198   endif
 199 endef
 200
 201 define 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
 207 endef
 208
 209 feature_print_text = $(eval $(feature_print_text_code))
 210 define feature_print_text_code
 211     MSG = $(shell printf '...%40s: %s' $(1) $(2))
 212 endef
 213
 214 #
 215 # generates feature value assignment for name, like:
 216 #   $(call feature_assign,dwarf) == feature-dwarf=1
 217 #
 218 feature_assign = feature-$(1)=$(feature-$(1))
 219
 220 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 221 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 222
 223 feature_dump_check = $(eval $(feature_dump_check_code))
 224 define feature_dump_check_code
 225   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 226     $(2) := 1
 227   endif
 228 endef
 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 $(FEATURE_DISPLAY) is not detected
 245 # - VF is enabled
 246
 247 ifeq ($(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)))
 250 endif
 251
 252 feature_display_check = $(eval $(feature_check_display_code))
 253 define feature_check_display_code
 254   ifneq ($(feature-$(1)), 1)
 255     feature_display := 1
 256   endif
 257 endef
 258
 259 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 260
 261 ifeq ($(VF),1)
 262   feature_display := 1
 263   feature_verbose := 1
 264 endif
 265
 266 ifneq ($(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)))
 272 endif
 273
 274 feature_display_entries = $(eval $(feature_display_entries_code))
 275 define feature_display_entries_code
 276   ifeq ($(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 $(MSG)))
 285   endif
 286 endef
 287
 288 ifeq ($(FEATURE_DISPLAY_DEFERRED),)
 289   $(call feature_display_entries)
 290   $(info )
 291 endif