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