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