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