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