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