| # SPDX-License-Identifier: GPL-2.0-only |
| feature_dir := $(srctree)/tools/build/feature |
| |
| ifneq ($(OUTPUT),) |
| OUTPUT_FEATURES = $(OUTPUT)feature/ |
| $(shell mkdir -p $(OUTPUT_FEATURES)) |
| endif |
| |
| feature_check = $(eval $(feature_check_code)) |
| define feature_check_code |
| feature-$(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) |
| endef |
| |
| feature_set = $(eval $(feature_set_code)) |
| define feature_set_code |
| feature-$(1) := 1 |
| endef |
| |
| # |
| # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output: |
| # |
| |
| # |
| # Note that this is not a complete list of all feature tests, just |
| # those that are typically built on a fully configured system. |
| # |
| # [ Feature tests not mentioned here have to be built explicitly in |
| # the rule that uses them - an example for that is the 'bionic' |
| # feature check. ] |
| # |
| FEATURE_TESTS_BASIC := \ |
| backtrace \ |
| dwarf \ |
| dwarf_getlocations \ |
| eventfd \ |
| fortify-source \ |
| get_current_dir_name \ |
| gettid \ |
| glibc \ |
| libbfd \ |
| libbfd-buildid \ |
| libcap \ |
| libelf \ |
| libelf-getphdrnum \ |
| libelf-gelf_getnote \ |
| libelf-getshdrstrndx \ |
| libnuma \ |
| numa_num_possible_cpus \ |
| libperl \ |
| libpython \ |
| libslang \ |
| libslang-include-subdir \ |
| libtraceevent \ |
| libtracefs \ |
| libcrypto \ |
| libunwind \ |
| pthread-attr-setaffinity-np \ |
| pthread-barrier \ |
| reallocarray \ |
| stackprotector-all \ |
| timerfd \ |
| libdw-dwarf-unwind \ |
| zlib \ |
| lzma \ |
| get_cpuid \ |
| bpf \ |
| sched_getcpu \ |
| sdt \ |
| setns \ |
| libaio \ |
| libzstd \ |
| disassembler-four-args \ |
| disassembler-init-styled \ |
| file-handle |
| |
| # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list |
| # of all feature tests |
| FEATURE_TESTS_EXTRA := \ |
| bionic \ |
| compile-32 \ |
| compile-x32 \ |
| cplus-demangle \ |
| gtk2 \ |
| gtk2-infobar \ |
| hello \ |
| libbabeltrace \ |
| libbfd-liberty \ |
| libbfd-liberty-z \ |
| libopencsd \ |
| libunwind-x86 \ |
| libunwind-x86_64 \ |
| libunwind-arm \ |
| libunwind-aarch64 \ |
| libunwind-debug-frame \ |
| libunwind-debug-frame-arm \ |
| libunwind-debug-frame-aarch64 \ |
| cxx \ |
| llvm \ |
| llvm-version \ |
| clang \ |
| libbpf \ |
| libbpf-btf__load_from_kernel_by_id \ |
| libbpf-bpf_prog_load \ |
| libbpf-bpf_object__next_program \ |
| libbpf-bpf_object__next_map \ |
| libbpf-bpf_program__set_insns \ |
| libbpf-bpf_create_map \ |
| libpfm4 \ |
| libdebuginfod \ |
| clang-bpf-co-re |
| |
| |
| FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC) |
| |
| ifeq ($(FEATURE_TESTS),all) |
| FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA) |
| endif |
| |
| FEATURE_DISPLAY ?= \ |
| dwarf \ |
| dwarf_getlocations \ |
| glibc \ |
| libbfd \ |
| libbfd-buildid \ |
| libcap \ |
| libelf \ |
| libnuma \ |
| numa_num_possible_cpus \ |
| libperl \ |
| libpython \ |
| libcrypto \ |
| libunwind \ |
| libdw-dwarf-unwind \ |
| zlib \ |
| lzma \ |
| get_cpuid \ |
| bpf \ |
| libaio \ |
| libzstd |
| |
| # |
| # Declare group members of a feature to display the logical OR of the detection |
| # result instead of each member result. |
| # |
| FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty libbfd-liberty-z |
| |
| # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features. |
| # If in the future we need per-feature checks/flags for features not |
| # mentioned in this list we need to refactor this ;-). |
| set_test_all_flags = $(eval $(set_test_all_flags_code)) |
| define set_test_all_flags_code |
| FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1)) |
| FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1)) |
| endef |
| |
| $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat))) |
| |
| # |
| # Special fast-path for the 'all features are available' case: |
| # |
| $(call feature_check,all,$(MSG)) |
| |
| # |
| # Just in case the build freshly failed, make sure we print the |
| # feature matrix: |
| # |
| ifeq ($(feature-all), 1) |
| # |
| # test-all.c passed - just set all the core feature flags to 1: |
| # |
| $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat))) |
| # |
| # test-all.c does not comprise these tests, so we need to |
| # for this case to get features proper values |
| # |
| $(call feature_check,compile-32) |
| $(call feature_check,compile-x32) |
| $(call feature_check,bionic) |
| $(call feature_check,libbabeltrace) |
| else |
| $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat))) |
| endif |
| |
| # |
| # Print the result of the feature test: |
| # |
| feature_print_status = $(eval $(feature_print_status_code)) |
| |
| feature_group = $(eval $(feature_gen_group)) $(GROUP) |
| |
| define feature_gen_group |
| GROUP := $(1) |
| ifneq ($(feature_verbose),1) |
| GROUP += $(FEATURE_GROUP_MEMBERS-$(1)) |
| endif |
| endef |
| |
| define feature_print_status_code |
| ifneq (,$(filter 1,$(foreach feat,$(call feature_group,$(feat)),$(feature-$(feat))))) |
| MSG = $(shell printf '...%40s: [ \033[32mon\033[m ]' $(1)) |
| else |
| MSG = $(shell printf '...%40s: [ \033[31mOFF\033[m ]' $(1)) |
| endif |
| endef |
| |
| feature_print_text = $(eval $(feature_print_text_code)) |
| define feature_print_text_code |
| MSG = $(shell printf '...%40s: %s' $(1) $(2)) |
| endef |
| |
| # |
| # generates feature value assignment for name, like: |
| # $(call feature_assign,dwarf) == feature-dwarf=1 |
| # |
| feature_assign = feature-$(1)=$(feature-$(1)) |
| |
| FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER) |
| FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME)) |
| |
| feature_dump_check = $(eval $(feature_dump_check_code)) |
| define feature_dump_check_code |
| ifeq ($(findstring $(1),$(FEATURE_DUMP)),) |
| $(2) := 1 |
| endif |
| endef |
| |
| # |
| # First check if any test from FEATURE_DISPLAY |
| # and set feature_display := 1 if it does |
| $(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display)) |
| |
| # |
| # Now also check if any other test changed, |
| # so we force FEATURE-DUMP generation |
| $(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed)) |
| |
| # The $(feature_display) controls the default detection message |
| # output. It's set if: |
| # - detected features differes from stored features from |
| # last build (in $(FEATURE_DUMP_FILENAME) file) |
| # - one of the $(FEATURE_DISPLAY) is not detected |
| # - VF is enabled |
| |
| ifeq ($(feature_dump_changed),1) |
| $(shell rm -f $(FEATURE_DUMP_FILENAME)) |
| $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME))) |
| endif |
| |
| feature_display_check = $(eval $(feature_check_display_code)) |
| define feature_check_display_code |
| ifneq ($(feature-$(1)), 1) |
| feature_display := 1 |
| endif |
| endef |
| |
| $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat))) |
| |
| ifeq ($(VF),1) |
| feature_display := 1 |
| feature_verbose := 1 |
| endif |
| |
| ifneq ($(feature_verbose),1) |
| # |
| # Determine the features to omit from the displayed message, as only the |
| # logical OR of the detection result will be shown. |
| # |
| FEATURE_OMIT := $(foreach feat,$(FEATURE_DISPLAY),$(FEATURE_GROUP_MEMBERS-$(feat))) |
| endif |
| |
| feature_display_entries = $(eval $(feature_display_entries_code)) |
| define feature_display_entries_code |
| ifeq ($(feature_display),1) |
| $$(info ) |
| $$(info Auto-detecting system features:) |
| $(foreach feat,$(filter-out $(FEATURE_OMIT),$(FEATURE_DISPLAY)),$(call feature_print_status,$(feat),) $$(info $(MSG))) |
| endif |
| |
| ifeq ($(feature_verbose),1) |
| $(eval TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))) |
| $(foreach feat,$(TMP),$(call feature_print_status,$(feat),) $$(info $(MSG))) |
| endif |
| endef |
| |
| ifeq ($(FEATURE_DISPLAY_DEFERRED),) |
| $(call feature_display_entries) |
| $(info ) |
| endif |
