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