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