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