tools/perf/build: Speed up auto-detection
The detection of certain rarely detected features can be delayed to when they are actually needed. So speed up the common case of auto-detection by pre-building only a core set of features and populating only their feature-flags. [ Features not listed in CORE_FEATURES need to built explicitly via the feature_check() function. ] (Also order the feature names alphabetically, while at it.) Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-xQkuveknd0gqla1dfxrqKpkl@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -105,30 +105,36 @@ endef
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$(info )
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$(info Auto-detecting system features:)
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FEATURE_TESTS = \
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hello \
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stackprotector-all \
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stackprotector \
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volatile-register-var \
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fortify-source \
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bionic \
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libelf \
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glibc \
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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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CORE_FEATURE_TESTS = \
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backtrace \
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dwarf \
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libelf-mmap \
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libelf-getphdrnum \
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libunwind \
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libaudit \
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libslang \
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fortify-source \
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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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libperl \
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libpython \
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libpython-version \
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libbfd \
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libslang \
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libunwind \
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on-exit \
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backtrace \
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libnuma
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stackprotector \
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stackprotector-all \
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volatile-register-var
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#
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# Special fast-path for the 'all features are available' case:
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@ -136,10 +142,13 @@ FEATURE_TESTS = \
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$(call feature_check,all)
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ifeq ($(feature-all), 1)
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$(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
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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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$(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_set,$(feat)))
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else
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$(shell $(MAKE) -i -j -C config/feature-checks >/dev/null 2>&1)
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$(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
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$(shell $(MAKE) -i -j -C config/feature-checks $(CORE_FEATURE_TESTS) >/dev/null 2>&1)
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$(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_check,$(feat)))
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endif
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feature_print = $(eval $(feature_print_code))
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@ -156,7 +165,7 @@ define feature_print_code
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$(info $(MSG))
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endef
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$(foreach feat,$(FEATURE_TESTS) DUMMY,$(call feature_print,$(feat)))
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$(foreach feat,$(CORE_FEATURE_TESTS) DUMMY,$(call feature_print,$(feat)))
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# newline at the end of the feature printouts:
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$(info )
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@ -1,28 +1,29 @@
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FILES= \
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test-hello \
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test-stackprotector-all \
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test-stackprotector \
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test-volatile-register-var \
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test-fortify-source \
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test-all \
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test-backtrace \
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test-bionic \
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test-libelf \
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test-glibc \
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test-dwarf \
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test-libelf-mmap \
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test-libelf-getphdrnum \
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test-libunwind \
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test-libaudit \
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test-libslang \
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test-fortify-source \
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test-glibc \
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test-gtk2 \
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test-gtk2-infobar \
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test-hello \
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test-libaudit \
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test-libbfd \
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test-libelf \
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test-libelf-getphdrnum \
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test-libelf-mmap \
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test-libnuma \
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test-libperl \
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test-libpython \
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test-libpython-version \
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test-libbfd \
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test-libslang \
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test-libunwind \
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test-on-exit \
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test-backtrace \
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test-libnuma
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test-stackprotector-all \
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test-stackprotector \
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test-volatile-register-var
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CC := $(CC) -MD
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