f67f2fda7d
The dwarf_getcfi() is available on libdw 0.142+. Instead of just checking the version number, it'd be nice to have a config item to check the feature at build time. Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: linux-toolchains@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Link: https://lore.kernel.org/r/20231110000012.3538610-9-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
292 lines
9.4 KiB
Gherkin
292 lines
9.4 KiB
Gherkin
# SPDX-License-Identifier: GPL-2.0-only
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feature_dir := $(srctree)/tools/build/feature
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ifneq ($(OUTPUT),)
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OUTPUT_FEATURES = $(OUTPUT)feature/
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$(shell mkdir -p $(OUTPUT_FEATURES))
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endif
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feature_check = $(eval $(feature_check_code))
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define feature_check_code
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feature-$(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)
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endef
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feature_set = $(eval $(feature_set_code))
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define feature_set_code
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feature-$(1) := 1
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endef
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#
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# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
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#
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#
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# Note that this is not a complete list of all feature tests, just
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# those that are typically built on a fully configured system.
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#
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# [ Feature tests not mentioned here have to be built explicitly in
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# the rule that uses them - an example for that is the 'bionic'
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# feature check. ]
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#
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FEATURE_TESTS_BASIC := \
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backtrace \
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dwarf \
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dwarf_getlocations \
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dwarf_getcfi \
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eventfd \
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fortify-source \
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get_current_dir_name \
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gettid \
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glibc \
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libbfd \
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libbfd-buildid \
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libcap \
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libelf \
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libelf-getphdrnum \
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libelf-gelf_getnote \
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libelf-getshdrstrndx \
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libnuma \
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numa_num_possible_cpus \
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libperl \
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libpython \
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libslang \
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libslang-include-subdir \
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libtraceevent \
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libtracefs \
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libcrypto \
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libunwind \
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pthread-attr-setaffinity-np \
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pthread-barrier \
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reallocarray \
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stackprotector-all \
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timerfd \
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libdw-dwarf-unwind \
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zlib \
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lzma \
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get_cpuid \
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bpf \
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scandirat \
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sched_getcpu \
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sdt \
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setns \
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libaio \
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libzstd \
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disassembler-four-args \
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disassembler-init-styled \
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file-handle
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# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
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# of all feature tests
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FEATURE_TESTS_EXTRA := \
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bionic \
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compile-32 \
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compile-x32 \
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cplus-demangle \
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cxa-demangle \
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gtk2 \
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gtk2-infobar \
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hello \
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libbabeltrace \
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libbfd-liberty \
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libbfd-liberty-z \
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libopencsd \
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libunwind-x86 \
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libunwind-x86_64 \
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libunwind-arm \
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libunwind-aarch64 \
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libunwind-debug-frame \
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libunwind-debug-frame-arm \
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libunwind-debug-frame-aarch64 \
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cxx \
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llvm \
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llvm-version \
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clang \
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libbpf \
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libbpf-btf__load_from_kernel_by_id \
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libbpf-bpf_prog_load \
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libbpf-bpf_object__next_program \
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libbpf-bpf_object__next_map \
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libbpf-bpf_program__set_insns \
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libbpf-bpf_create_map \
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libpfm4 \
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libdebuginfod \
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clang-bpf-co-re
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FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
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ifeq ($(FEATURE_TESTS),all)
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FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
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endif
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FEATURE_DISPLAY ?= \
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dwarf \
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dwarf_getlocations \
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glibc \
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libbfd \
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libbfd-buildid \
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libcap \
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libelf \
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libnuma \
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numa_num_possible_cpus \
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libperl \
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libpython \
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libcrypto \
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libunwind \
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libdw-dwarf-unwind \
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zlib \
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lzma \
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get_cpuid \
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bpf \
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libaio \
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libzstd
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#
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# Declare group members of a feature to display the logical OR of the detection
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# result instead of each member result.
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#
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FEATURE_GROUP_MEMBERS-libbfd = libbfd-liberty libbfd-liberty-z
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# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
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# If in the future we need per-feature checks/flags for features not
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# mentioned in this list we need to refactor this ;-).
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set_test_all_flags = $(eval $(set_test_all_flags_code))
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define set_test_all_flags_code
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FEATURE_CHECK_CFLAGS-all += $(FEATURE_CHECK_CFLAGS-$(1))
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FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
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endef
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$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
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#
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# Special fast-path for the 'all features are available' case:
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#
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$(call feature_check,all,$(MSG))
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#
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# Just in case the build freshly failed, make sure we print the
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# feature matrix:
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#
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ifeq ($(feature-all), 1)
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#
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# test-all.c passed - just set all the core feature flags to 1:
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#
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$(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
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#
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# test-all.c does not comprise these tests, so we need to
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# for this case to get features proper values
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#
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$(call feature_check,compile-32)
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$(call feature_check,compile-x32)
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$(call feature_check,bionic)
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$(call feature_check,libbabeltrace)
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else
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$(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
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endif
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#
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# Print the result of the feature test:
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#
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feature_print_status = $(eval $(feature_print_status_code))
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feature_group = $(eval $(feature_gen_group)) $(GROUP)
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define feature_gen_group
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GROUP := $(1)
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ifneq ($(feature_verbose),1)
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GROUP += $(FEATURE_GROUP_MEMBERS-$(1))
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endif
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endef
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define feature_print_status_code
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ifneq (,$(filter 1,$(foreach feat,$(call feature_group,$(feat)),$(feature-$(feat)))))
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MSG = $(shell printf '...%40s: [ \033[32mon\033[m ]' $(1))
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else
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MSG = $(shell printf '...%40s: [ \033[31mOFF\033[m ]' $(1))
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endif
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endef
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feature_print_text = $(eval $(feature_print_text_code))
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define feature_print_text_code
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MSG = $(shell printf '...%40s: %s' $(1) $(2))
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endef
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#
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# generates feature value assignment for name, like:
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# $(call feature_assign,dwarf) == feature-dwarf=1
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#
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feature_assign = feature-$(1)=$(feature-$(1))
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FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
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FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
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feature_dump_check = $(eval $(feature_dump_check_code))
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define feature_dump_check_code
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ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
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$(2) := 1
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endif
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endef
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#
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# First check if any test from FEATURE_DISPLAY
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# and set feature_display := 1 if it does
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$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
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#
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# Now also check if any other test changed,
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# so we force FEATURE-DUMP generation
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$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
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# The $(feature_display) controls the default detection message
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# output. It's set if:
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# - detected features differes from stored features from
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# last build (in $(FEATURE_DUMP_FILENAME) file)
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# - one of the $(FEATURE_DISPLAY) is not detected
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# - VF is enabled
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ifeq ($(feature_dump_changed),1)
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$(shell rm -f $(FEATURE_DUMP_FILENAME))
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$(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
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endif
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feature_display_check = $(eval $(feature_check_display_code))
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define feature_check_display_code
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ifneq ($(feature-$(1)), 1)
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feature_display := 1
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endif
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endef
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$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
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ifeq ($(VF),1)
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feature_display := 1
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feature_verbose := 1
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endif
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ifneq ($(feature_verbose),1)
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#
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# Determine the features to omit from the displayed message, as only the
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# logical OR of the detection result will be shown.
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#
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FEATURE_OMIT := $(foreach feat,$(FEATURE_DISPLAY),$(FEATURE_GROUP_MEMBERS-$(feat)))
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endif
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feature_display_entries = $(eval $(feature_display_entries_code))
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define feature_display_entries_code
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ifeq ($(feature_display),1)
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$$(info )
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$$(info Auto-detecting system features:)
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$(foreach feat,$(filter-out $(FEATURE_OMIT),$(FEATURE_DISPLAY)),$(call feature_print_status,$(feat),) $$(info $(MSG)))
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endif
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ifeq ($(feature_verbose),1)
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$(eval TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS)))
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$(foreach feat,$(TMP),$(call feature_print_status,$(feat),) $$(info $(MSG)))
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endif
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endef
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ifeq ($(FEATURE_DISPLAY_DEFERRED),)
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$(call feature_display_entries)
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$(info )
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endif
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