tools/build/Makefile.feature

   1 feature_dir := $(srctree)/tools/build/feature
   2
   3 ifneq ($(OUTPUT),)
   4   OUTPUT_FEATURES = $(OUTPUT)feature/
   5   $(shell mkdir -p $(OUTPUT_FEATURES))
   6 endif
   7
   8 feature_check = $(eval $(feature_check_code))
   9 define feature_check_code
  10   feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
  11 endef
  12
  13 feature_set = $(eval $(feature_set_code))
  14 define feature_set_code
  15   feature-$(1) := 1
  16 endef
  17
  18 #
  19 # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
  20 #
  21
  22 #
  23 # Note that this is not a complete list of all feature tests, just
  24 # those that are typically built on a fully configured system.
  25 #
  26 # [ Feature tests not mentioned here have to be built explicitly in
  27 #   the rule that uses them - an example for that is the 'bionic'
  28 #   feature check. ]
  29 #
  30 FEATURE_TESTS_BASIC :=                  \
  31         backtrace                       \
  32         dwarf                           \
  33         dwarf_getlocations              \
  34         fortify-source                  \
  35         sync-compare-and-swap           \
  36         glibc                           \
  37         gtk2                            \
  38         gtk2-infobar                    \
  39         libaudit                        \
  40         libbfd                          \
  41         libelf                          \
  42         libelf-getphdrnum               \
  43         libelf-mmap                     \
  44         libnuma                         \
  45         numa_num_possible_cpus          \
  46         libperl                         \
  47         libpython                       \
  48         libpython-version               \
  49         libslang                        \
  50         libcrypto                       \
  51         libunwind                       \
  52         pthread-attr-setaffinity-np     \
  53         stackprotector-all              \
  54         timerfd                         \
  55         libdw-dwarf-unwind              \
  56         zlib                            \
  57         lzma                            \
  58         get_cpuid                       \
  59         bpf
  60
  61 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
  62 # of all feature tests
  63 FEATURE_TESTS_EXTRA :=                  \
  64         bionic                          \
  65         compile-32                      \
  66         compile-x32                     \
  67         cplus-demangle                  \
  68         hello                           \
  69         libbabeltrace                   \
  70         liberty                         \
  71         liberty-z                       \
  72         libunwind-debug-frame
  73
  74 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
  75
  76 ifeq ($(FEATURE_TESTS),all)
  77   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
  78 endif
  79
  80 FEATURE_DISPLAY ?=                      \
  81         dwarf                           \
  82         dwarf_getlocations              \
  83         glibc                           \
  84         gtk2                            \
  85         libaudit                        \
  86         libbfd                          \
  87         libelf                          \
  88         libnuma                         \
  89         numa_num_possible_cpus          \
  90         libperl                         \
  91         libpython                       \
  92         libslang                        \
  93         libcrypto                       \
  94         libunwind                       \
  95         libdw-dwarf-unwind              \
  96         zlib                            \
  97         lzma                            \
  98         get_cpuid                       \
  99         bpf
 100
 101 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 102 # If in the future we need per-feature checks/flags for features not
 103 # mentioned in this list we need to refactor this ;-).
 104 set_test_all_flags = $(eval $(set_test_all_flags_code))
 105 define set_test_all_flags_code
 106   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 107   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 108 endef
 109
 110 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 111
 112 #
 113 # Special fast-path for the 'all features are available' case:
 114 #
 115 $(call feature_check,all,$(MSG))
 116
 117 #
 118 # Just in case the build freshly failed, make sure we print the
 119 # feature matrix:
 120 #
 121 ifeq ($(feature-all), 1)
 122   #
 123   # test-all.c passed - just set all the core feature flags to 1:
 124   #
 125   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 126   #
 127   # test-all.c does not comprise these tests, so we need to
 128   # for this case to get features proper values
 129   #
 130   $(call feature_check,compile-32)
 131   $(call feature_check,compile-x32)
 132   $(call feature_check,bionic)
 133   $(call feature_check,libbabeltrace)
 134 else
 135   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 136 endif
 137
 138 #
 139 # Print the result of the feature test:
 140 #
 141 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 142
 143 define feature_print_status_code
 144   ifeq ($(feature-$(1)), 1)
 145     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 146   else
 147     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 148   endif
 149 endef
 150
 151 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 152 define feature_print_text_code
 153     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 154 endef
 155
 156 #
 157 # generates feature value assignment for name, like:
 158 #   $(call feature_assign,dwarf) == feature-dwarf=1
 159 #
 160 feature_assign = feature-$(1)=$(feature-$(1))
 161
 162 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 163 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 164
 165 feature_dump_check = $(eval $(feature_dump_check_code))
 166 define feature_dump_check_code
 167   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 168     $(2) := 1
 169   endif
 170 endef
 171
 172 #
 173 # First check if any test from FEATURE_DISPLAY
 174 # and set feature_display := 1 if it does
 175 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 176
 177 #
 178 # Now also check if any other test changed,
 179 # so we force FEATURE-DUMP generation
 180 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 181
 182 # The $(feature_display) controls the default detection message
 183 # output. It's set if:
 184 # - detected features differes from stored features from
 185 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 186 # - one of the $(FEATURE_DISPLAY) is not detected
 187 # - VF is enabled
 188
 189 ifeq ($(feature_dump_changed),1)
 190   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 191   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 192 endif
 193
 194 feature_display_check = $(eval $(feature_check_display_code))
 195 define feature_check_display_code
 196   ifneq ($(feature-$(1)), 1)
 197     feature_display := 1
 198   endif
 199 endef
 200
 201 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 202
 203 ifeq ($(VF),1)
 204   feature_display := 1
 205   feature_verbose := 1
 206 endif
 207
 208 ifeq ($(feature_display),1)
 209   $(info )
 210   $(info Auto-detecting system features:)
 211   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 212   ifneq ($(feature_verbose),1)
 213     $(info )
 214   endif
 215 endif
 216
 217 ifeq ($(feature_verbose),1)
 218   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 219   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 220   $(info )
 221 endif