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