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) 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 ?=                        \
  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         libunwind                       \
  50         pthread-attr-setaffinity-np     \
  51         stackprotector-all              \
  52         timerfd                         \
  53         libdw-dwarf-unwind              \
  54         zlib                            \
  55         lzma                            \
  56         get_cpuid
  57
  58 FEATURE_DISPLAY ?=                      \
  59         dwarf                           \
  60         glibc                           \
  61         gtk2                            \
  62         libaudit                        \
  63         libbfd                          \
  64         libelf                          \
  65         libnuma                         \
  66         numa_num_possible_cpus          \
  67         libperl                         \
  68         libpython                       \
  69         libslang                        \
  70         libunwind                       \
  71         libdw-dwarf-unwind              \
  72         zlib                            \
  73         lzma                            \
  74         get_cpuid
  75
  76 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
  77 # If in the future we need per-feature checks/flags for features not
  78 # mentioned in this list we need to refactor this ;-).
  79 set_test_all_flags = $(eval $(set_test_all_flags_code))
  80 define set_test_all_flags_code
  81   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
  82   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
  83 endef
  84
  85 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
  86
  87 #
  88 # Special fast-path for the 'all features are available' case:
  89 #
  90 $(call feature_check,all,$(MSG))
  91
  92 #
  93 # Just in case the build freshly failed, make sure we print the
  94 # feature matrix:
  95 #
  96 ifeq ($(feature-all), 1)
  97   #
  98   # test-all.c passed - just set all the core feature flags to 1:
  99   #
 100   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
 101 else
 102   $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1)
 103   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
 104 endif
 105
 106 #
 107 # Print the result of the feature test:
 108 #
 109 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
 110
 111 define feature_print_status_code
 112   ifeq ($(feature-$(1)), 1)
 113     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
 114   else
 115     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
 116   endif
 117 endef
 118
 119 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
 120 define feature_print_text_code
 121     MSG = $(shell printf '...%30s: %s' $(1) $(2))
 122 endef
 123
 124 FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
 125 FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP)
 126
 127 ifeq ($(dwarf-post-unwind),1)
 128   FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
 129 endif
 130
 131 # The $(feature_display) controls the default detection message
 132 # output. It's set if:
 133 # - detected features differes from stored features from
 134 #   last build (in FEATURE-DUMP file)
 135 # - one of the $(FEATURE_DISPLAY) is not detected
 136 # - VF is enabled
 137
 138 ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)")
 139   $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP)
 140   feature_display := 1
 141 endif
 142
 143 feature_display_check = $(eval $(feature_check_code))
 144 define feature_display_check_code
 145   ifneq ($(feature-$(1)), 1)
 146     feature_display := 1
 147   endif
 148 endef
 149
 150 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
 151
 152 ifeq ($(VF),1)
 153   feature_display := 1
 154   feature_verbose := 1
 155 endif
 156
 157 ifeq ($(feature_display),1)
 158   $(info )
 159   $(info Auto-detecting system features:)
 160   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
 161
 162   ifeq ($(dwarf-post-unwind),1)
 163     $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
 164   endif
 165
 166   ifneq ($(feature_verbose),1)
 167     $(info )
 168   endif
 169 endif
 170
 171 ifeq ($(feature_verbose),1)
 172   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
 173   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
 174   $(info )
 175 endif