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ed63f34c02
By adding libbpf into perf's Makefile, this patch enables perf to build libbpf if libelf is found and neither NO_LIBELF nor NO_LIBBPF is set. The newly introduced code is similar to how libapi and libtraceevent are wired into Makefile.perf. MANIFEST is also updated for 'make perf-*-src-pkg'. Append make_no_libbpf to tools/perf/tests/make. The 'bpf' feature check is appended into default FEATURE_TESTS and FEATURE_DISPLAY, so perf will check the API version of bpf in /path/to/kernel/include/uapi/linux/bpf.h. Which should not fail except when we are trying to port this code to an old kernel. Error messages are also updated to notify users about the lack of BPF support in 'perf record' if libelf is missing or the BPF API check failed. tools/lib/bpf is added to TAG_FOLDERS to allow us to navigate libbpf files when working on perf using tools/perf/tags. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1444826502-49291-2-git-send-email-wangnan0@huawei.com [ Document NO_LIBBPF in Makefile.perf, noted by Jiri Olsa ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
179 lines
4.7 KiB
Gherkin
179 lines
4.7 KiB
Gherkin
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) 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)
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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 ?= \
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backtrace \
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dwarf \
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fortify-source \
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sync-compare-and-swap \
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glibc \
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gtk2 \
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gtk2-infobar \
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libaudit \
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libbfd \
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libelf \
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libelf-getphdrnum \
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libelf-mmap \
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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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libpython-version \
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libslang \
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libunwind \
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pthread-attr-setaffinity-np \
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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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FEATURE_DISPLAY ?= \
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dwarf \
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glibc \
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gtk2 \
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libaudit \
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libbfd \
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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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libslang \
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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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# 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,$(feat)))
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else
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$(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1)
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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)) $(info $(MSG))
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define feature_print_status_code
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ifeq ($(feature-$(1)), 1)
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MSG = $(shell printf '...%30s: [ \033[32mon\033[m ]' $(1))
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else
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MSG = $(shell printf '...%30s: [ \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)) $(info $(MSG))
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define feature_print_text_code
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MSG = $(shell printf '...%30s: %s' $(1) $(2))
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endef
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FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
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FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
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FEATURE_DUMP_FILE := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
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ifeq ($(dwarf-post-unwind),1)
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FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
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endif
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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 $(FEATURE_DISPLAY) is not detected
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# - VF is enabled
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ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)")
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$(shell echo "$(FEATURE_DUMP)" > $(FEATURE_DUMP_FILENAME))
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feature_display := 1
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endif
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feature_display_check = $(eval $(feature_check_display_code))
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define feature_display_check_code
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ifneq ($(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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ifeq ($(feature_display),1)
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$(info )
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$(info Auto-detecting system features:)
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$(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
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ifeq ($(dwarf-post-unwind),1)
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$(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
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endif
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ifneq ($(feature_verbose),1)
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$(info )
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endif
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endif
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ifeq ($(feature_verbose),1)
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TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
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$(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
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$(info )
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endif
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