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