1feature_dir := $(srctree)/tools/build/feature 2 3ifneq ($(OUTPUT),) 4 OUTPUT_FEATURES = $(OUTPUT)feature/ 5 $(shell mkdir -p $(OUTPUT_FEATURES)) 6endif 7 8feature_check = $(eval $(feature_check_code)) 9define feature_check_code 10 feature-$(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) 11endef 12 13feature_set = $(eval $(feature_set_code)) 14define feature_set_code 15 feature-$(1) := 1 16endef 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# 30FEATURE_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 58FEATURE_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 ;-). 79set_test_all_flags = $(eval $(set_test_all_flags_code)) 80define set_test_all_flags_code 81 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1)) 82 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1)) 83endef 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# 96ifeq ($(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))) 101else 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))) 104endif 105 106# 107# Print the result of the feature test: 108# 109feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG)) 110 111define feature_print_status_code 112 ifeq ($(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 117endef 118 119feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG)) 120define feature_print_text_code 121 MSG = $(shell printf '...%30s: %s' $(1) $(2)) 122endef 123 124FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat)))) 125FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP) 126 127ifeq ($(dwarf-post-unwind),1) 128 FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text)) 129endif 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 $(FEATURE_DISPLAY) is not detected 136# - VF is enabled 137 138ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)") 139 $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP) 140 feature_display := 1 141endif 142 143feature_display_check = $(eval $(feature_check_code)) 144define feature_display_check_code 145 ifneq ($(feature-$(1)), 1) 146 feature_display := 1 147 endif 148endef 149 150$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat))) 151 152ifeq ($(VF),1) 153 feature_display := 1 154 feature_verbose := 1 155endif 156 157ifeq ($(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 $(info ) 168 endif 169endif 170 171ifeq ($(feature_verbose),1) 172 TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)) 173 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),)) 174 $(info ) 175endif 176