LXR linux/tools/build/Makefile.feature

   1# SPDX-License-Identifier: GPL-2.0-only
   2feature_dir := $(srctree)/tools/build/feature
   3
   4ifneq ($(OUTPUT),)
   5  OUTPUT_FEATURES = $(OUTPUT)feature/
   6  $(shell mkdir -p $(OUTPUT_FEATURES))
   7endif
   8
   9feature_check = $(eval $(feature_check_code))
  10define feature_check_code
  11  feature-$(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)
  12endef
  13
  14feature_set = $(eval $(feature_set_code))
  15define feature_set_code
  16  feature-$(1) := 1
  17endef
  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#
  31FEATURE_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        libbfd                          \
  44        libcap                          \
  45        libelf                          \
  46        libelf-getphdrnum               \
  47        libelf-gelf_getnote             \
  48        libelf-getshdrstrndx            \
  49        libelf-mmap                     \
  50        libnuma                         \
  51        numa_num_possible_cpus          \
  52        libperl                         \
  53        libpython                       \
  54        libpython-version               \
  55        libslang                        \
  56        libslang-include-subdir         \
  57        libcrypto                       \
  58        libunwind                       \
  59        pthread-attr-setaffinity-np     \
  60        pthread-barrier                 \
  61        reallocarray                    \
  62        stackprotector-all              \
  63        timerfd                         \
  64        libdw-dwarf-unwind              \
  65        zlib                            \
  66        lzma                            \
  67        get_cpuid                       \
  68        bpf                             \
  69        sched_getcpu                    \
  70        sdt                             \
  71        setns                           \
  72        libaio                          \
  73        libzstd                         \
  74        disassembler-four-args          \
  75        file-handle
  76
  77# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
  78# of all feature tests
  79FEATURE_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         libpfm4
 102
 103FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 104
 105ifeq ($(FEATURE_TESTS),all)
 106  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 107endif
 108
 109FEATURE_DISPLAY ?=              \
 110         dwarf                  \
 111         dwarf_getlocations     \
 112         glibc                  \
 113         gtk2                   \
 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 ;-).
 135set_test_all_flags = $(eval $(set_test_all_flags_code))
 136define set_test_all_flags_code
 137  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 138  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 139endef
 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#
 152ifeq ($(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)
 165else
 166  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 167endif
 168
 169#
 170# Print the result of the feature test:
 171#
 172feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 173
 174define feature_print_status_code
 175  ifeq ($(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
 180endef
 181
 182feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 183define feature_print_text_code
 184    MSG = $(shell printf '...%30s: %s' $(1) $(2))
 185endef
 186
 187#
 188# generates feature value assignment for name, like:
 189#   $(call feature_assign,dwarf) == feature-dwarf=1
 190#
 191feature_assign = feature-$(1)=$(feature-$(1))
 192
 193FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 194FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 195
 196feature_dump_check = $(eval $(feature_dump_check_code))
 197define feature_dump_check_code
 198  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 199    $(2) := 1
 200  endif
 201endef
 202
 203#
 204# First check if any test from FEATURE_DISPLAY
 205# and set feature_display := 1 if it does
 206$(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 $(FEATURE_DISPLAY) is not detected
 218# - VF is enabled
 219
 220ifeq ($(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)))
 223endif
 224
 225feature_display_check = $(eval $(feature_check_display_code))
 226define feature_check_display_code
 227  ifneq ($(feature-$(1)), 1)
 228    feature_display := 1
 229  endif
 230endef
 231
 232$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 233
 234ifeq ($(VF),1)
 235  feature_display := 1
 236  feature_verbose := 1
 237endif
 238
 239ifeq ($(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    $(info )
 245  endif
 246endif
 247
 248ifeq ($(feature_verbose),1)
 249  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 250  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 251  $(info )
 252endif
 253