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) 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)
  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         libbfd                          \
  42         libbfd-buildid                  \
  43         libcap                          \
  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         libslang-include-subdir         \
  56         libcrypto                       \
  57         libunwind                       \
  58         pthread-attr-setaffinity-np     \
  59         pthread-barrier                 \
  60         reallocarray                    \
  61         stackprotector-all              \
  62         timerfd                         \
  63         libdw-dwarf-unwind              \
  64         zlib                            \
  65         lzma                            \
  66         get_cpuid                       \
  67         bpf                             \
  68         sched_getcpu                    \
  69         sdt                             \
  70         setns                           \
  71         libaio                          \
  72         libzstd                         \
  73         disassembler-four-args          \
  74         file-handle
  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          gtk2                           \
  84          gtk2-infobar                   \
  85          hello                          \
  86          libbabeltrace                  \
  87          libbfd-liberty                 \
  88          libbfd-liberty-z               \
  89          libopencsd                     \
  90          libunwind-x86                  \
  91          libunwind-x86_64               \
  92          libunwind-arm                  \
  93          libunwind-aarch64              \
  94          libunwind-debug-frame          \
  95          libunwind-debug-frame-arm      \
  96          libunwind-debug-frame-aarch64  \
  97          cxx                            \
  98          llvm                           \
  99          llvm-version                   \
 100          clang                          \
 101          libbpf                         \
 102          libpfm4                        \
 103          libdebuginfod
 104
 105 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 106
 107 ifeq ($(FEATURE_TESTS),all)
 108   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 109 endif
 110
 111 FEATURE_DISPLAY ?=              \
 112          dwarf                  \
 113          dwarf_getlocations     \
 114          glibc                  \
 115          libbfd                 \
 116          libbfd-buildid         \
 117          libcap                 \
 118          libelf                 \
 119          libnuma                \
 120          numa_num_possible_cpus \
 121          libperl                \
 122          libpython              \
 123          libcrypto              \
 124          libunwind              \
 125          libdw-dwarf-unwind     \
 126          zlib                   \
 127          lzma                   \
 128          get_cpuid              \
 129          bpf                    \
 130          libaio                 \
 131          libzstd                \
 132          disassembler-four-args
 133
 134 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 135 # If in the future we need per-feature checks/flags for features not
 136 # mentioned in this list we need to refactor this ;-).
 137 set_test_all_flags = $(eval $(set_test_all_flags_code))
 138 define set_test_all_flags_code
 139   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 140   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 141 endef
 142
 143 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 144
 145 #
 146 # Special fast-path for the 'all features are available' case:
 147 #
 148 $(call feature_check,all,$(MSG))
 149
 150 #
 151 # Just in case the build freshly failed, make sure we print the
 152 # feature matrix:
 153 #
 154 ifeq ($(feature-all), 1)
 155   #
 156   # test-all.c passed - just set all the core feature flags to 1:
 157   #
 158   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 159   #
 160   # test-all.c does not comprise these tests, so we need to
 161   # for this case to get features proper values
 162   #
 163   $(call feature_check,compile-32)
 164   $(call feature_check,compile-x32)
 165   $(call feature_check,bionic)
 166   $(call feature_check,libbabeltrace)
 167 else
 168   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 169 endif
 170
 171 #
 172 # Print the result of the feature test:
 173 #
 174 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 175
 176 define feature_print_status_code
 177   ifeq ($(feature-$(1)), 1)
 178     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 179   else
 180     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 181   endif
 182 endef
 183
 184 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 185 define feature_print_text_code
 186     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 187 endef
 188
 189 #
 190 # generates feature value assignment for name, like:
 191 #   $(call feature_assign,dwarf) == feature-dwarf=1
 192 #
 193 feature_assign = feature-$(1)=$(feature-$(1))
 194
 195 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 196 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 197
 198 feature_dump_check = $(eval $(feature_dump_check_code))
 199 define feature_dump_check_code
 200   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 201     $(2) := 1
 202   endif
 203 endef
 204
 205 #
 206 # First check if any test from FEATURE_DISPLAY
 207 # and set feature_display := 1 if it does
 208 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 209
 210 #
 211 # Now also check if any other test changed,
 212 # so we force FEATURE-DUMP generation
 213 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 214
 215 # The $(feature_display) controls the default detection message
 216 # output. It's set if:
 217 # - detected features differes from stored features from
 218 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 219 # - one of the $(FEATURE_DISPLAY) is not detected
 220 # - VF is enabled
 221
 222 ifeq ($(feature_dump_changed),1)
 223   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 224   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 225 endif
 226
 227 feature_display_check = $(eval $(feature_check_display_code))
 228 define feature_check_display_code
 229   ifneq ($(feature-$(1)), 1)
 230     feature_display := 1
 231   endif
 232 endef
 233
 234 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 235
 236 ifeq ($(VF),1)
 237   feature_display := 1
 238   feature_verbose := 1
 239 endif
 240
 241 ifeq ($(feature_display),1)
 242   $(info )
 243   $(info Auto-detecting system features:)
 244   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 245   ifneq ($(feature_verbose),1)
 246     $(info )
 247   endif
 248 endif
 249
 250 ifeq ($(feature_verbose),1)
 251   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 252   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 253   $(info )
 254 endif