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