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         libunwind-x86                   \
  53         libunwind-x86_64                \
  54         libunwind-arm                   \
  55         libunwind-aarch64               \
  56         pthread-attr-setaffinity-np     \
  57         stackprotector-all              \
  58         timerfd                         \
  59         libdw-dwarf-unwind              \
  60         zlib                            \
  61         lzma                            \
  62         get_cpuid                       \
  63         bpf
  64
  65 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
  66 # of all feature tests
  67 FEATURE_TESTS_EXTRA :=                  \
  68         bionic                          \
  69         compile-32                      \
  70         compile-x32                     \
  71         cplus-demangle                  \
  72         hello                           \
  73         libbabeltrace                   \
  74         liberty                         \
  75         liberty-z                       \
  76         libunwind-debug-frame           \
  77         libunwind-debug-frame-arm       \
  78         libunwind-debug-frame-aarch64
  79
  80 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
  81
  82 ifeq ($(FEATURE_TESTS),all)
  83   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
  84 endif
  85
  86 FEATURE_DISPLAY ?=                      \
  87         dwarf                           \
  88         dwarf_getlocations              \
  89         glibc                           \
  90         gtk2                            \
  91         libaudit                        \
  92         libbfd                          \
  93         libelf                          \
  94         libnuma                         \
  95         numa_num_possible_cpus          \
  96         libperl                         \
  97         libpython                       \
  98         libslang                        \
  99         libcrypto                       \
 100         libunwind                       \
 101         libdw-dwarf-unwind              \
 102         zlib                            \
 103         lzma                            \
 104         get_cpuid                       \
 105         bpf
 106
 107 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 108 # If in the future we need per-feature checks/flags for features not
 109 # mentioned in this list we need to refactor this ;-).
 110 set_test_all_flags = $(eval $(set_test_all_flags_code))
 111 define set_test_all_flags_code
 112   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
 113   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
 114 endef
 115
 116 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
 117
 118 #
 119 # Special fast-path for the 'all features are available' case:
 120 #
 121 $(call feature_check,all,$(MSG))
 122
 123 #
 124 # Just in case the build freshly failed, make sure we print the
 125 # feature matrix:
 126 #
 127 ifeq ($(feature-all), 1)
 128   #
 129   # test-all.c passed - just set all the core feature flags to 1:
 130   #
 131   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 132   #
 133   # test-all.c does not comprise these tests, so we need to
 134   # for this case to get features proper values
 135   #
 136   $(call feature_check,compile-32)
 137   $(call feature_check,compile-x32)
 138   $(call feature_check,bionic)
 139   $(call feature_check,libbabeltrace)
 140 else
 141   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 142 endif
 143
 144 #
 145 # Print the result of the feature test:
 146 #
 147 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 148
 149 define feature_print_status_code
 150   ifeq ($(feature-$(1)), 1)
 151     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 152   else
 153     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 154   endif
 155 endef
 156
 157 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 158 define feature_print_text_code
 159     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 160 endef
 161
 162 #
 163 # generates feature value assignment for name, like:
 164 #   $(call feature_assign,dwarf) == feature-dwarf=1
 165 #
 166 feature_assign = feature-$(1)=$(feature-$(1))
 167
 168 FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
 169 FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
 170
 171 feature_dump_check = $(eval $(feature_dump_check_code))
 172 define feature_dump_check_code
 173   ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
 174     $(2) := 1
 175   endif
 176 endef
 177
 178 #
 179 # First check if any test from FEATURE_DISPLAY
 180 # and set feature_display := 1 if it does
 181 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
 182
 183 #
 184 # Now also check if any other test changed,
 185 # so we force FEATURE-DUMP generation
 186 $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
 187
 188 # The $(feature_display) controls the default detection message
 189 # output. It's set if:
 190 # - detected features differes from stored features from
 191 #   last build (in $(FEATURE_DUMP_FILENAME) file)
 192 # - one of the $(FEATURE_DISPLAY) is not detected
 193 # - VF is enabled
 194
 195 ifeq ($(feature_dump_changed),1)
 196   $(shell rm -f $(FEATURE_DUMP_FILENAME))
 197   $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
 198 endif
 199
 200 feature_display_check = $(eval $(feature_check_display_code))
 201 define feature_check_display_code
 202   ifneq ($(feature-$(1)), 1)
 203     feature_display := 1
 204   endif
 205 endef
 206
 207 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 208
 209 ifeq ($(VF),1)
 210   feature_display := 1
 211   feature_verbose := 1
 212 endif
 213
 214 ifeq ($(feature_display),1)
 215   $(info )
 216   $(info Auto-detecting system features:)
 217   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 218   ifneq ($(feature_verbose),1)
 219     $(info )
 220   endif
 221 endif
 222
 223 ifeq ($(feature_verbose),1)
 224   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 225   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 226   $(info )
 227 endif