tools/build/Makefile.feature

   1 feature_dir := $(srctree)/tools/build/feature
   2
   3 ifneq ($(OUTPUT),)
   4   OUTPUT_FEATURES = $(OUTPUT)feature/
   5   $(shell mkdir -p $(OUTPUT_FEATURES))
   6 endif
   7
   8 feature_check = $(eval $(feature_check_code))
   9 define feature_check_code
  10   feature-$(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)
  11 endef
  12
  13 feature_set = $(eval $(feature_set_code))
  14 define feature_set_code
  15   feature-$(1) := 1
  16 endef
  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 #
  30 FEATURE_TESTS_BASIC :=                  \
  31         backtrace                       \
  32         dwarf                           \
  33         dwarf_getlocations              \
  34         eventfd                         \
  35         fortify-source                  \
  36         sync-compare-and-swap           \
  37         get_current_dir_name            \
  38         gettid                          \
  39         glibc                           \
  40         gtk2                            \
  41         gtk2-infobar                    \
  42         libaudit                        \
  43         libbfd                          \
  44         libelf                          \
  45         libelf-getphdrnum               \
  46         libelf-gelf_getnote             \
  47         libelf-getshdrstrndx            \
  48         libelf-mmap                     \
  49         libnuma                         \
  50         numa_num_possible_cpus          \
  51         libperl                         \
  52         libpython                       \
  53         libslang                        \
  54         libcrypto                       \
  55         libunwind                       \
  56         libunwind-x86                   \
  57         libunwind-x86_64                \
  58         libunwind-arm                   \
  59         libunwind-aarch64               \
  60         pthread-attr-setaffinity-np     \
  61         pthread-barrier                 \
  62         reallocarray                    \
  63         stackprotector-all              \
  64         timerfd                         \
  65         libdw-dwarf-unwind              \
  66         zlib                            \
  67         lzma                            \
  68         get_cpuid                       \
  69         bpf                             \
  70         sched_getcpu                    \
  71         sdt                             \
  72         setns                           \
  73         libopencsd
  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          hello                          \
  83          libbabeltrace                  \
  84          libbfd-liberty                 \
  85          libbfd-liberty-z               \
  86          libunwind-debug-frame          \
  87          libunwind-debug-frame-arm      \
  88          libunwind-debug-frame-aarch64  \
  89          cxx                            \
  90          llvm                           \
  91          llvm-version                   \
  92          clang
  93
  94 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
  95
  96 ifeq ($(FEATURE_TESTS),all)
  97   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
  98 endif
  99
 100 FEATURE_DISPLAY ?=              \
 101          dwarf                  \
 102          dwarf_getlocations     \
 103          glibc                  \
 104          gtk2                   \
 105          libaudit               \
 106          libbfd                 \
 107          libelf                 \
 108          libnuma                \
 109          numa_num_possible_cpus \
 110          libperl                \
 111          libpython              \
 112          libslang               \
 113          libcrypto              \
 114          libunwind              \
 115          libdw-dwarf-unwind     \
 116          zlib                   \
 117          lzma                   \
 118          get_cpuid              \
 119          bpf
 120
 121 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 122 # If in the future we need per-feature checks/flags for features not
 123 # mentioned in this list we need to refactor this ;-).
 124 set_test_all_flags = $(eval $(set_test_all_flags_code))
 125 define set_test_all_flags_code
 126   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 127   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 128 endef
 129
 130 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 131
 132 #
 133 # Special fast-path for the 'all features are available' case:
 134 #
 135 $(call feature_check,all,$(MSG))
 136
 137 #
 138 # Just in case the build freshly failed, make sure we print the
 139 # feature matrix:
 140 #
 141 ifeq ($(feature-all), 1)
 142   #
 143   # test-all.c passed - just set all the core feature flags to 1:
 144   #
 145   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 146   #
 147   # test-all.c does not comprise these tests, so we need to
 148   # for this case to get features proper values
 149   #
 150   $(call feature_check,compile-32)
 151   $(call feature_check,compile-x32)
 152   $(call feature_check,bionic)
 153   $(call feature_check,libbabeltrace)
 154 else
 155   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 156 endif
 157
 158 #
 159 # Print the result of the feature test:
 160 #
 161 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 162
 163 define feature_print_status_code
 164   ifeq ($(feature-$(1)), 1)
 165     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 166   else
 167     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 168   endif
 169 endef
 170
 171 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 172 define feature_print_text_code
 173     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 174 endef
 175
 176 #
 177 # generates feature value assignment for name, like:
 178 #   $(call feature_assign,dwarf) == feature-dwarf=1
 179 #
 180 feature_assign = feature-$(1)=$(feature-$(1))
 181
 182 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 183 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 184
 185 feature_dump_check = $(eval $(feature_dump_check_code))
 186 define feature_dump_check_code
 187   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 188     $(2) := 1
 189   endif
 190 endef
 191
 192 #
 193 # First check if any test from FEATURE_DISPLAY
 194 # and set feature_display := 1 if it does
 195 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 196
 197 #
 198 # Now also check if any other test changed,
 199 # so we force FEATURE-DUMP generation
 200 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 201
 202 # The $(feature_display) controls the default detection message
 203 # output. It's set if:
 204 # - detected features differes from stored features from
 205 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 206 # - one of the $(FEATURE_DISPLAY) is not detected
 207 # - VF is enabled
 208
 209 ifeq ($(feature_dump_changed),1)
 210   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 211   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 212 endif
 213
 214 feature_display_check = $(eval $(feature_check_display_code))
 215 define feature_check_display_code
 216   ifneq ($(feature-$(1)), 1)
 217     feature_display := 1
 218   endif
 219 endef
 220
 221 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 222
 223 ifeq ($(VF),1)
 224   feature_display := 1
 225   feature_verbose := 1
 226 endif
 227
 228 ifeq ($(feature_display),1)
 229   $(info )
 230   $(info Auto-detecting system features:)
 231   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 232   ifneq ($(feature_verbose),1)
 233     $(info )
 234   endif
 235 endif
 236
 237 ifeq ($(feature_verbose),1)
 238   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 239   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 240   $(info )
 241 endif