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 libperl \ 45 libpython \ 46 libpython-version \ 47 libslang \ 48 libunwind \ 49 pthread-attr-setaffinity-np \ 50 stackprotector-all \ 51 timerfd \ 52 libdw-dwarf-unwind \ 53 zlib \ 54 lzma 55 56FEATURE_DISPLAY = \ 57 dwarf \ 58 glibc \ 59 gtk2 \ 60 libaudit \ 61 libbfd \ 62 libelf \ 63 libnuma \ 64 libperl \ 65 libpython \ 66 libslang \ 67 libunwind \ 68 libdw-dwarf-unwind \ 69 zlib \ 70 lzma 71 72# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features. 73# If in the future we need per-feature checks/flags for features not 74# mentioned in this list we need to refactor this ;-). 75set_test_all_flags = $(eval $(set_test_all_flags_code)) 76define set_test_all_flags_code 77 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1)) 78 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1)) 79endef 80 81$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat))) 82 83# 84# Special fast-path for the 'all features are available' case: 85# 86$(call feature_check,all,$(MSG)) 87 88# 89# Just in case the build freshly failed, make sure we print the 90# feature matrix: 91# 92ifeq ($(feature-all), 1) 93 # 94 # test-all.c passed - just set all the core feature flags to 1: 95 # 96 $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat))) 97else 98 $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1) 99 $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat))) 100endif 101 102# 103# Print the result of the feature test: 104# 105feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG)) 106 107define feature_print_status_code 108 ifeq ($(feature-$(1)), 1) 109 MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1)) 110 else 111 MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1)) 112 endif 113endef 114 115feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG)) 116define feature_print_text_code 117 MSG = $(shell printf '...%30s: %s' $(1) $(2)) 118endef 119 120FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat)))) 121FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP) 122 123ifeq ($(dwarf-post-unwind),1) 124 FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text)) 125endif 126 127# The $(feature_display) controls the default detection message 128# output. It's set if: 129# - detected features differes from stored features from 130# last build (in FEATURE-DUMP file) 131# - one of the $(FEATURE_DISPLAY) is not detected 132# - VF is enabled 133 134ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)") 135 $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP) 136 feature_display := 1 137endif 138 139feature_display_check = $(eval $(feature_check_code)) 140define feature_display_check_code 141 ifneq ($(feature-$(1)), 1) 142 feature_display := 1 143 endif 144endef 145 146$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat))) 147 148ifeq ($(VF),1) 149 feature_display := 1 150 feature_verbose := 1 151endif 152 153ifeq ($(feature_display),1) 154 $(info ) 155 $(info Auto-detecting system features:) 156 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),)) 157 158 ifeq ($(dwarf-post-unwind),1) 159 $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text)) 160 endif 161 162 ifneq ($(feature_verbose),1) 163 $(info ) 164 endif 165endif 166 167ifeq ($(feature_verbose),1) 168 TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)) 169 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),)) 170 $(info ) 171endif 172