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