Makefile.feature (8826B)
1# SPDX-License-Identifier: GPL-2.0-only 2feature_dir := $(srctree)/tools/build/feature 3 4ifneq ($(OUTPUT),) 5 OUTPUT_FEATURES = $(OUTPUT)feature/ 6 $(shell mkdir -p $(OUTPUT_FEATURES)) 7endif 8 9feature_check = $(eval $(feature_check_code)) 10define feature_check_code 11 feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CC="$(CC)" CXX="$(CXX)" CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0) 12endef 13 14feature_set = $(eval $(feature_set_code)) 15define feature_set_code 16 feature-$(1) := 1 17endef 18 19# 20# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output: 21# 22 23# 24# Note that this is not a complete list of all feature tests, just 25# those that are typically built on a fully configured system. 26# 27# [ Feature tests not mentioned here have to be built explicitly in 28# the rule that uses them - an example for that is the 'bionic' 29# feature check. ] 30# 31FEATURE_TESTS_BASIC := \ 32 backtrace \ 33 dwarf \ 34 dwarf_getlocations \ 35 eventfd \ 36 fortify-source \ 37 get_current_dir_name \ 38 gettid \ 39 glibc \ 40 libbfd \ 41 libbfd-buildid \ 42 libcap \ 43 libelf \ 44 libelf-getphdrnum \ 45 libelf-gelf_getnote \ 46 libelf-getshdrstrndx \ 47 libnuma \ 48 numa_num_possible_cpus \ 49 libperl \ 50 libpython \ 51 libslang \ 52 libslang-include-subdir \ 53 libtraceevent \ 54 libtracefs \ 55 libcrypto \ 56 libunwind \ 57 pthread-attr-setaffinity-np \ 58 pthread-barrier \ 59 reallocarray \ 60 stackprotector-all \ 61 timerfd \ 62 libdw-dwarf-unwind \ 63 zlib \ 64 lzma \ 65 get_cpuid \ 66 bpf \ 67 sched_getcpu \ 68 sdt \ 69 setns \ 70 libaio \ 71 libzstd \ 72 disassembler-four-args \ 73 file-handle 74 75# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list 76# of all feature tests 77FEATURE_TESTS_EXTRA := \ 78 bionic \ 79 compile-32 \ 80 compile-x32 \ 81 cplus-demangle \ 82 gtk2 \ 83 gtk2-infobar \ 84 hello \ 85 libbabeltrace \ 86 libbfd-liberty \ 87 libbfd-liberty-z \ 88 libopencsd \ 89 libunwind-x86 \ 90 libunwind-x86_64 \ 91 libunwind-arm \ 92 libunwind-aarch64 \ 93 libunwind-debug-frame \ 94 libunwind-debug-frame-arm \ 95 libunwind-debug-frame-aarch64 \ 96 cxx \ 97 llvm \ 98 llvm-version \ 99 clang \ 100 libbpf \ 101 libbpf-btf__load_from_kernel_by_id \ 102 libbpf-bpf_prog_load \ 103 libbpf-bpf_object__next_program \ 104 libbpf-bpf_object__next_map \ 105 libbpf-bpf_create_map \ 106 libpfm4 \ 107 libdebuginfod \ 108 clang-bpf-co-re 109 110 111FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC) 112 113ifeq ($(FEATURE_TESTS),all) 114 FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA) 115endif 116 117FEATURE_DISPLAY ?= \ 118 dwarf \ 119 dwarf_getlocations \ 120 glibc \ 121 libbfd \ 122 libbfd-buildid \ 123 libcap \ 124 libelf \ 125 libnuma \ 126 numa_num_possible_cpus \ 127 libperl \ 128 libpython \ 129 libcrypto \ 130 libunwind \ 131 libdw-dwarf-unwind \ 132 zlib \ 133 lzma \ 134 get_cpuid \ 135 bpf \ 136 libaio \ 137 libzstd \ 138 disassembler-four-args 139 140# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features. 141# If in the future we need per-feature checks/flags for features not 142# mentioned in this list we need to refactor this ;-). 143set_test_all_flags = $(eval $(set_test_all_flags_code)) 144define set_test_all_flags_code 145 FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1)) 146 FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1)) 147endef 148 149$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat))) 150 151# 152# Special fast-path for the 'all features are available' case: 153# 154$(call feature_check,all,$(MSG)) 155 156# 157# Just in case the build freshly failed, make sure we print the 158# feature matrix: 159# 160ifeq ($(feature-all), 1) 161 # 162 # test-all.c passed - just set all the core feature flags to 1: 163 # 164 $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat))) 165 # 166 # test-all.c does not comprise these tests, so we need to 167 # for this case to get features proper values 168 # 169 $(call feature_check,compile-32) 170 $(call feature_check,compile-x32) 171 $(call feature_check,bionic) 172 $(call feature_check,libbabeltrace) 173else 174 $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat))) 175endif 176 177# 178# Print the result of the feature test: 179# 180feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG)) 181 182define feature_print_status_code 183 ifeq ($(feature-$(1)), 1) 184 MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1)) 185 else 186 MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1)) 187 endif 188endef 189 190feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG)) 191define feature_print_text_code 192 MSG = $(shell printf '...%30s: %s' $(1) $(2)) 193endef 194 195# 196# generates feature value assignment for name, like: 197# $(call feature_assign,dwarf) == feature-dwarf=1 198# 199feature_assign = feature-$(1)=$(feature-$(1)) 200 201FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER) 202FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME)) 203 204feature_dump_check = $(eval $(feature_dump_check_code)) 205define feature_dump_check_code 206 ifeq ($(findstring $(1),$(FEATURE_DUMP)),) 207 $(2) := 1 208 endif 209endef 210 211# 212# First check if any test from FEATURE_DISPLAY 213# and set feature_display := 1 if it does 214$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display)) 215 216# 217# Now also check if any other test changed, 218# so we force FEATURE-DUMP generation 219$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed)) 220 221# The $(feature_display) controls the default detection message 222# output. It's set if: 223# - detected features differes from stored features from 224# last build (in $(FEATURE_DUMP_FILENAME) file) 225# - one of the $(FEATURE_DISPLAY) is not detected 226# - VF is enabled 227 228ifeq ($(feature_dump_changed),1) 229 $(shell rm -f $(FEATURE_DUMP_FILENAME)) 230 $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME))) 231endif 232 233feature_display_check = $(eval $(feature_check_display_code)) 234define feature_check_display_code 235 ifneq ($(feature-$(1)), 1) 236 feature_display := 1 237 endif 238endef 239 240$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat))) 241 242ifeq ($(VF),1) 243 feature_display := 1 244 feature_verbose := 1 245endif 246 247feature_display_entries = $(eval $(feature_display_entries_code)) 248define feature_display_entries_code 249 ifeq ($(feature_display),1) 250 $(info ) 251 $(info Auto-detecting system features:) 252 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),)) 253 ifneq ($(feature_verbose),1) 254 $(info ) 255 endif 256 endif 257 258 ifeq ($(feature_verbose),1) 259 TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)) 260 $(foreach feat,$(TMP),$(call feature_print_status,$(feat),)) 261 $(info ) 262 endif 263endef 264 265ifeq ($(FEATURE_DISPLAY_DEFERRED),) 266 $(call feature_display_entries) 267endif