tools/build/Makefile.feature

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 feature_dir := $(srctree)/tools/build/feature
   3
   4 ifneq ($(OUTPUT),)
   5   OUTPUT_FEATURES = $(OUTPUT)feature/
   6   $(shell mkdir -p $(OUTPUT_FEATURES))
   7 endif
   8
   9 feature_check = $(eval $(feature_check_code))
  10 define feature_check_code
  11   feature-$(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)
  12 endef
  13
  14 feature_set = $(eval $(feature_set_code))
  15 define feature_set_code
  16   feature-$(1) := 1
  17 endef
  18
  19 #
  20 # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
  21 #
  22
  23 #
  24 # Note that this is not a complete list of all feature tests, just
  25 # those that are typically built on a fully configured system.
  26 #
  27 # [ Feature tests not mentioned here have to be built explicitly in
  28 #   the rule that uses them - an example for that is the 'bionic'
  29 #   feature check. ]
  30 #
  31 FEATURE_TESTS_BASIC :=                  \
  32         backtrace                       \
  33         dwarf                           \
  34         dwarf_getlocations              \
  35         eventfd                         \
  36         fortify-source                  \
  37         sync-compare-and-swap           \
  38         get_current_dir_name            \
  39         gettid                          \
  40         glibc                           \
  41         gtk2                            \
  42         gtk2-infobar                    \
  43         libaudit                        \
  44         libbfd                          \
  45         libcap                          \
  46         libelf                          \
  47         libelf-getphdrnum               \
  48         libelf-gelf_getnote             \
  49         libelf-getshdrstrndx            \
  50         libelf-mmap                     \
  51         libnuma                         \
  52         numa_num_possible_cpus          \
  53         libperl                         \
  54         libpython                       \
  55         libpython-version               \
  56         libslang                        \
  57         libslang-include-subdir         \
  58         libcrypto                       \
  59         libunwind                       \
  60         pthread-attr-setaffinity-np     \
  61         pthread-barrier                 \
  62         reallocarray                    \
  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         libaio                          \
  74         libzstd                         \
  75         disassembler-four-args
  76
  77 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
  78 # of all feature tests
  79 FEATURE_TESTS_EXTRA :=                  \
  80          bionic                         \
  81          compile-32                     \
  82          compile-x32                    \
  83          cplus-demangle                 \
  84          hello                          \
  85          libbabeltrace                  \
  86          libbfd-liberty                 \
  87          libbfd-liberty-z               \
  88          libopencsd                     \
  89          libunwind-x86                  \
  90          libunwind-x86_64               \
  91          libunwind-arm                  \
  92          libunwind-aarch64              \
  93          libunwind-debug-frame          \
  94          libunwind-debug-frame-arm      \
  95          libunwind-debug-frame-aarch64  \
  96          cxx                            \
  97          llvm                           \
  98          llvm-version                   \
  99          clang
 100
 101 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 102
 103 ifeq ($(FEATURE_TESTS),all)
 104   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 105 endif
 106
 107 FEATURE_DISPLAY ?=              \
 108          dwarf                  \
 109          dwarf_getlocations     \
 110          glibc                  \
 111          gtk2                   \
 112          libaudit               \
 113          libbfd                 \
 114          libcap                 \
 115          libelf                 \
 116          libnuma                \
 117          numa_num_possible_cpus \
 118          libperl                \
 119          libpython              \
 120          libcrypto              \
 121          libunwind              \
 122          libdw-dwarf-unwind     \
 123          zlib                   \
 124          lzma                   \
 125          get_cpuid              \
 126          bpf                    \
 127          libaio                 \
 128          libzstd                \
 129          disassembler-four-args
 130
 131 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 132 # If in the future we need per-feature checks/flags for features not
 133 # mentioned in this list we need to refactor this ;-).
 134 set_test_all_flags = $(eval $(set_test_all_flags_code))
 135 define set_test_all_flags_code
 136   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 137   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 138 endef
 139
 140 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 141
 142 #
 143 # Special fast-path for the 'all features are available' case:
 144 #
 145 $(call feature_check,all,$(MSG))
 146
 147 #
 148 # Just in case the build freshly failed, make sure we print the
 149 # feature matrix:
 150 #
 151 ifeq ($(feature-all), 1)
 152   #
 153   # test-all.c passed - just set all the core feature flags to 1:
 154   #
 155   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 156   #
 157   # test-all.c does not comprise these tests, so we need to
 158   # for this case to get features proper values
 159   #
 160   $(call feature_check,compile-32)
 161   $(call feature_check,compile-x32)
 162   $(call feature_check,bionic)
 163   $(call feature_check,libbabeltrace)
 164 else
 165   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 166 endif
 167
 168 #
 169 # Print the result of the feature test:
 170 #
 171 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 172
 173 define feature_print_status_code
 174   ifeq ($(feature-$(1)), 1)
 175     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 176   else
 177     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 178   endif
 179 endef
 180
 181 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 182 define feature_print_text_code
 183     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 184 endef
 185
 186 #
 187 # generates feature value assignment for name, like:
 188 #   $(call feature_assign,dwarf) == feature-dwarf=1
 189 #
 190 feature_assign = feature-$(1)=$(feature-$(1))
 191
 192 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 193 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 194
 195 feature_dump_check = $(eval $(feature_dump_check_code))
 196 define feature_dump_check_code
 197   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 198     $(2) := 1
 199   endif
 200 endef
 201
 202 #
 203 # First check if any test from FEATURE_DISPLAY
 204 # and set feature_display := 1 if it does
 205 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 206
 207 #
 208 # Now also check if any other test changed,
 209 # so we force FEATURE-DUMP generation
 210 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 211
 212 # The $(feature_display) controls the default detection message
 213 # output. It's set if:
 214 # - detected features differes from stored features from
 215 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 216 # - one of the $(FEATURE_DISPLAY) is not detected
 217 # - VF is enabled
 218
 219 ifeq ($(feature_dump_changed),1)
 220   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 221   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 222 endif
 223
 224 feature_display_check = $(eval $(feature_check_display_code))
 225 define feature_check_display_code
 226   ifneq ($(feature-$(1)), 1)
 227     feature_display := 1
 228   endif
 229 endef
 230
 231 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 232
 233 ifeq ($(VF),1)
 234   feature_display := 1
 235   feature_verbose := 1
 236 endif
 237
 238 ifeq ($(feature_display),1)
 239   $(info )
 240   $(info Auto-detecting system features:)
 241   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 242   ifneq ($(feature_verbose),1)
 243     $(info )
 244   endif
 245 endif
 246
 247 ifeq ($(feature_verbose),1)
 248   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 249   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 250   $(info )
 251 endif