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         get_current_dir_name            \
  38         gettid                          \
  39         glibc                           \
  40         libbfd                          \
  41         libbfd-buildid                  \
  42         libcap                          \
  43         libelf                          \
  44         libelf-getphdrnum               \
  45         libelf-gelf_getnote             \
  46         libelf-getshdrstrndx            \
  47         libnuma                         \
  48         numa_num_possible_cpus          \
  49         libperl                         \
  50         libpython                       \
  51         libslang                        \
  52         libslang-include-subdir         \
  53         libtraceevent                   \
  54         libcrypto                       \
  55         libunwind                       \
  56         pthread-attr-setaffinity-np     \
  57         pthread-barrier                 \
  58         reallocarray                    \
  59         stackprotector-all              \
  60         timerfd                         \
  61         libdw-dwarf-unwind              \
  62         zlib                            \
  63         lzma                            \
  64         get_cpuid                       \
  65         bpf                             \
  66         sched_getcpu                    \
  67         sdt                             \
  68         setns                           \
  69         libaio                          \
  70         libzstd                         \
  71         disassembler-four-args          \
  72         file-handle
  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          gtk2                           \
  82          gtk2-infobar                   \
  83          hello                          \
  84          libbabeltrace                  \
  85          libbfd-liberty                 \
  86          libbfd-liberty-z               \
  87          libopencsd                     \
  88          libunwind-x86                  \
  89          libunwind-x86_64               \
  90          libunwind-arm                  \
  91          libunwind-aarch64              \
  92          libunwind-debug-frame          \
  93          libunwind-debug-frame-arm      \
  94          libunwind-debug-frame-aarch64  \
  95          cxx                            \
  96          llvm                           \
  97          llvm-version                   \
  98          clang                          \
  99          libbpf                         \
 100          libbpf-btf__load_from_kernel_by_id \
 101          libpfm4                        \
 102          libdebuginfod                  \
 103          clang-bpf-co-re
 104
 105
 106 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 107
 108 ifeq ($(FEATURE_TESTS),all)
 109   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 110 endif
 111
 112 FEATURE_DISPLAY ?=              \
 113          dwarf                  \
 114          dwarf_getlocations     \
 115          glibc                  \
 116          libbfd                 \
 117          libbfd-buildid         \
 118          libcap                 \
 119          libelf                 \
 120          libnuma                \
 121          numa_num_possible_cpus \
 122          libperl                \
 123          libpython              \
 124          libcrypto              \
 125          libunwind              \
 126          libdw-dwarf-unwind     \
 127          zlib                   \
 128          lzma                   \
 129          get_cpuid              \
 130          bpf                    \
 131          libaio                 \
 132          libzstd                \
 133          disassembler-four-args
 134
 135 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 136 # If in the future we need per-feature checks/flags for features not
 137 # mentioned in this list we need to refactor this ;-).
 138 set_test_all_flags = $(eval $(set_test_all_flags_code))
 139 define set_test_all_flags_code
 140   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 141   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 142 endef
 143
 144 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 145
 146 #
 147 # Special fast-path for the 'all features are available' case:
 148 #
 149 $(call feature_check,all,$(MSG))
 150
 151 #
 152 # Just in case the build freshly failed, make sure we print the
 153 # feature matrix:
 154 #
 155 ifeq ($(feature-all), 1)
 156   #
 157   # test-all.c passed - just set all the core feature flags to 1:
 158   #
 159   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 160   #
 161   # test-all.c does not comprise these tests, so we need to
 162   # for this case to get features proper values
 163   #
 164   $(call feature_check,compile-32)
 165   $(call feature_check,compile-x32)
 166   $(call feature_check,bionic)
 167   $(call feature_check,libbabeltrace)
 168 else
 169   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 170 endif
 171
 172 #
 173 # Print the result of the feature test:
 174 #
 175 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 176
 177 define feature_print_status_code
 178   ifeq ($(feature-$(1)), 1)
 179     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 180   else
 181     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 182   endif
 183 endef
 184
 185 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 186 define feature_print_text_code
 187     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 188 endef
 189
 190 #
 191 # generates feature value assignment for name, like:
 192 #   $(call feature_assign,dwarf) == feature-dwarf=1
 193 #
 194 feature_assign = feature-$(1)=$(feature-$(1))
 195
 196 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 197 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 198
 199 feature_dump_check = $(eval $(feature_dump_check_code))
 200 define feature_dump_check_code
 201   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 202     $(2) := 1
 203   endif
 204 endef
 205
 206 #
 207 # First check if any test from FEATURE_DISPLAY
 208 # and set feature_display := 1 if it does
 209 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 210
 211 #
 212 # Now also check if any other test changed,
 213 # so we force FEATURE-DUMP generation
 214 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 215
 216 # The $(feature_display) controls the default detection message
 217 # output. It's set if:
 218 # - detected features differes from stored features from
 219 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 220 # - one of the $(FEATURE_DISPLAY) is not detected
 221 # - VF is enabled
 222
 223 ifeq ($(feature_dump_changed),1)
 224   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 225   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 226 endif
 227
 228 feature_display_check = $(eval $(feature_check_display_code))
 229 define feature_check_display_code
 230   ifneq ($(feature-$(1)), 1)
 231     feature_display := 1
 232   endif
 233 endef
 234
 235 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 236
 237 ifeq ($(VF),1)
 238   feature_display := 1
 239   feature_verbose := 1
 240 endif
 241
 242 feature_display_entries = $(eval $(feature_display_entries_code))
 243 define feature_display_entries_code
 244   ifeq ($(feature_display),1)
 245     $(info )
 246     $(info Auto-detecting system features:)
 247     $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 248     ifneq ($(feature_verbose),1)
 249       $(info )
 250     endif
 251   endif
 252
 253   ifeq ($(feature_verbose),1)
 254     TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 255     $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 256     $(info )
 257   endif
 258 endef
 259
 260 ifeq ($(FEATURE_DISPLAY_DEFERRED),)
 261   $(call feature_display_entries)
 262 endif