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