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