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         eventfd                         \
  36         fortify-source                  \
  37         sync-compare-and-swap           \
  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         libpython-version               \
  53         libslang                        \
  54         libslang-include-subdir         \
  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         file-handle
  74
  75 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
  76 # of all feature tests
  77 FEATURE_TESTS_EXTRA :=                  \
  78          bionic                         \
  79          compile-32                     \
  80          compile-x32                    \
  81          cplus-demangle                 \
  82          gtk2                           \
  83          gtk2-infobar                   \
  84          hello                          \
  85          libbabeltrace                  \
  86          libbfd-liberty                 \
  87          libbfd-liberty-z               \
  88          libopencsd                     \
  89          libunwind-x86                  \
  90          libunwind-x86_64               \
  91          libunwind-arm                  \
  92          libunwind-aarch64              \
  93          libunwind-debug-frame          \
  94          libunwind-debug-frame-arm      \
  95          libunwind-debug-frame-aarch64  \
  96          cxx                            \
  97          llvm                           \
  98          llvm-version                   \
  99          clang                          \
 100          libbpf                         \
 101          libpfm4                        \
 102          libdebuginfod
 103
 104 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 105
 106 ifeq ($(FEATURE_TESTS),all)
 107   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 108 endif
 109
 110 FEATURE_DISPLAY ?=              \
 111          dwarf                  \
 112          dwarf_getlocations     \
 113          glibc                  \
 114          libbfd                 \
 115          libbfd-buildid         \
 116          libcap                 \
 117          libelf                 \
 118          libnuma                \
 119          numa_num_possible_cpus \
 120          libperl                \
 121          libpython              \
 122          libcrypto              \
 123          libunwind              \
 124          libdw-dwarf-unwind     \
 125          zlib                   \
 126          lzma                   \
 127          get_cpuid              \
 128          bpf                    \
 129          libaio                 \
 130          libzstd                \
 131          disassembler-four-args
 132
 133 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 134 # If in the future we need per-feature checks/flags for features not
 135 # mentioned in this list we need to refactor this ;-).
 136 set_test_all_flags = $(eval $(set_test_all_flags_code))
 137 define set_test_all_flags_code
 138   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 139   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 140 endef
 141
 142 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 143
 144 #
 145 # Special fast-path for the 'all features are available' case:
 146 #
 147 $(call feature_check,all,$(MSG))
 148
 149 #
 150 # Just in case the build freshly failed, make sure we print the
 151 # feature matrix:
 152 #
 153 ifeq ($(feature-all), 1)
 154   #
 155   # test-all.c passed - just set all the core feature flags to 1:
 156   #
 157   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 158   #
 159   # test-all.c does not comprise these tests, so we need to
 160   # for this case to get features proper values
 161   #
 162   $(call feature_check,compile-32)
 163   $(call feature_check,compile-x32)
 164   $(call feature_check,bionic)
 165   $(call feature_check,libbabeltrace)
 166 else
 167   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 168 endif
 169
 170 #
 171 # Print the result of the feature test:
 172 #
 173 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 174
 175 define feature_print_status_code
 176   ifeq ($(feature-$(1)), 1)
 177     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 178   else
 179     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 180   endif
 181 endef
 182
 183 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 184 define feature_print_text_code
 185     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 186 endef
 187
 188 #
 189 # generates feature value assignment for name, like:
 190 #   $(call feature_assign,dwarf) == feature-dwarf=1
 191 #
 192 feature_assign = feature-$(1)=$(feature-$(1))
 193
 194 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 195 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 196
 197 feature_dump_check = $(eval $(feature_dump_check_code))
 198 define feature_dump_check_code
 199   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 200     $(2) := 1
 201   endif
 202 endef
 203
 204 #
 205 # First check if any test from FEATURE_DISPLAY
 206 # and set feature_display := 1 if it does
 207 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 208
 209 #
 210 # Now also check if any other test changed,
 211 # so we force FEATURE-DUMP generation
 212 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 213
 214 # The $(feature_display) controls the default detection message
 215 # output. It's set if:
 216 # - detected features differes from stored features from
 217 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 218 # - one of the $(FEATURE_DISPLAY) is not detected
 219 # - VF is enabled
 220
 221 ifeq ($(feature_dump_changed),1)
 222   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 223   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 224 endif
 225
 226 feature_display_check = $(eval $(feature_check_display_code))
 227 define feature_check_display_code
 228   ifneq ($(feature-$(1)), 1)
 229     feature_display := 1
 230   endif
 231 endef
 232
 233 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 234
 235 ifeq ($(VF),1)
 236   feature_display := 1
 237   feature_verbose := 1
 238 endif
 239
 240 ifeq ($(feature_display),1)
 241   $(info )
 242   $(info Auto-detecting system features:)
 243   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 244   ifneq ($(feature_verbose),1)
 245     $(info )
 246   endif
 247 endif
 248
 249 ifeq ($(feature_verbose),1)
 250   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 251   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 252   $(info )
 253 endif