Re: [PATCH 11/14] tools build: Move feature checks code under tools/build

[David Ahern <david.ahern@oracle.com>]

On 3/3/15 7:26 AM, Jiri Olsa wrote:
> Moving feature checks code under tools/build directory.

How does a specific tool specify which features are of interest? I can't 
imagine all features for perf are wanted by other tools.

David

>
> Changing also $feature_dir to point to new feature directory
> location and perf Makefiles to include Makefile.feature from
> new location.
>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
> Cc: David Ahern <david.ahern@oracle.com>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> ---
>   tools/build/Makefile.feature                       | 171 +++++++++++++++++++++
>   tools/build/feature/.gitignore                     |   2 +
>   tools/build/feature/Makefile                       | 159 +++++++++++++++++++
>   tools/build/feature/test-all.c                     | 136 ++++++++++++++++
>   tools/build/feature/test-backtrace.c               |  13 ++
>   tools/build/feature/test-bionic.c                  |   6 +
>   tools/build/feature/test-compile.c                 |   4 +
>   tools/build/feature/test-cplus-demangle.c          |  14 ++
>   tools/build/feature/test-dwarf.c                   |  10 ++
>   tools/build/feature/test-fortify-source.c          |   6 +
>   tools/build/feature/test-glibc.c                   |   8 +
>   tools/build/feature/test-gtk2-infobar.c            |  11 ++
>   tools/build/feature/test-gtk2.c                    |  10 ++
>   tools/build/feature/test-hello.c                   |   6 +
>   tools/build/feature/test-libaudit.c                |  10 ++
>   tools/build/feature/test-libbabeltrace.c           |   8 +
>   tools/build/feature/test-libbfd.c                  |  15 ++
>   tools/build/feature/test-libdw-dwarf-unwind.c      |  13 ++
>   tools/build/feature/test-libelf-getphdrnum.c       |   8 +
>   tools/build/feature/test-libelf-mmap.c             |   8 +
>   tools/build/feature/test-libelf.c                  |   8 +
>   tools/build/feature/test-libnuma.c                 |   9 ++
>   tools/build/feature/test-libperl.c                 |   9 ++
>   tools/build/feature/test-libpython-version.c       |  10 ++
>   tools/build/feature/test-libpython.c               |   8 +
>   tools/build/feature/test-libslang.c                |   6 +
>   tools/build/feature/test-libunwind-debug-frame.c   |  16 ++
>   tools/build/feature/test-libunwind.c               |  27 ++++
>   .../feature/test-pthread-attr-setaffinity-np.c     |  17 ++
>   tools/build/feature/test-stackprotector-all.c      |   6 +
>   tools/build/feature/test-sync-compare-and-swap.c   |  14 ++
>   tools/build/feature/test-timerfd.c                 |  18 +++
>   tools/build/feature/test-zlib.c                    |   9 ++
>   tools/perf/Makefile.perf                           |   2 +-
>   tools/perf/config/Makefile                         |   2 +-
>   tools/perf/config/Makefile.feature                 | 171 ---------------------
>   tools/perf/config/feature-checks/.gitignore        |   2 -
>   tools/perf/config/feature-checks/Makefile          | 159 -------------------
>   tools/perf/config/feature-checks/test-all.c        | 136 ----------------
>   tools/perf/config/feature-checks/test-backtrace.c  |  13 --
>   tools/perf/config/feature-checks/test-bionic.c     |   6 -
>   tools/perf/config/feature-checks/test-compile.c    |   4 -
>   .../config/feature-checks/test-cplus-demangle.c    |  14 --
>   tools/perf/config/feature-checks/test-dwarf.c      |  10 --
>   .../config/feature-checks/test-fortify-source.c    |   6 -
>   tools/perf/config/feature-checks/test-glibc.c      |   8 -
>   .../perf/config/feature-checks/test-gtk2-infobar.c |  11 --
>   tools/perf/config/feature-checks/test-gtk2.c       |  10 --
>   tools/perf/config/feature-checks/test-hello.c      |   6 -
>   tools/perf/config/feature-checks/test-libaudit.c   |  10 --
>   .../config/feature-checks/test-libbabeltrace.c     |   8 -
>   tools/perf/config/feature-checks/test-libbfd.c     |  15 --
>   .../feature-checks/test-libdw-dwarf-unwind.c       |  13 --
>   .../config/feature-checks/test-libelf-getphdrnum.c |   8 -
>   .../perf/config/feature-checks/test-libelf-mmap.c  |   8 -
>   tools/perf/config/feature-checks/test-libelf.c     |   8 -
>   tools/perf/config/feature-checks/test-libnuma.c    |   9 --
>   tools/perf/config/feature-checks/test-libperl.c    |   9 --
>   .../config/feature-checks/test-libpython-version.c |  10 --
>   tools/perf/config/feature-checks/test-libpython.c  |   8 -
>   tools/perf/config/feature-checks/test-libslang.c   |   6 -
>   .../feature-checks/test-libunwind-debug-frame.c    |  16 --
>   tools/perf/config/feature-checks/test-libunwind.c  |  27 ----
>   .../test-pthread-attr-setaffinity-np.c             |  17 --
>   .../feature-checks/test-stackprotector-all.c       |   6 -
>   .../feature-checks/test-sync-compare-and-swap.c    |  14 --
>   tools/perf/config/feature-checks/test-timerfd.c    |  18 ---
>   tools/perf/config/feature-checks/test-zlib.c       |   9 --
>   68 files changed, 777 insertions(+), 777 deletions(-)
>   create mode 100644 tools/build/Makefile.feature
>   create mode 100644 tools/build/feature/.gitignore
>   create mode 100644 tools/build/feature/Makefile
>   create mode 100644 tools/build/feature/test-all.c
>   create mode 100644 tools/build/feature/test-backtrace.c
>   create mode 100644 tools/build/feature/test-bionic.c
>   create mode 100644 tools/build/feature/test-compile.c
>   create mode 100644 tools/build/feature/test-cplus-demangle.c
>   create mode 100644 tools/build/feature/test-dwarf.c
>   create mode 100644 tools/build/feature/test-fortify-source.c
>   create mode 100644 tools/build/feature/test-glibc.c
>   create mode 100644 tools/build/feature/test-gtk2-infobar.c
>   create mode 100644 tools/build/feature/test-gtk2.c
>   create mode 100644 tools/build/feature/test-hello.c
>   create mode 100644 tools/build/feature/test-libaudit.c
>   create mode 100644 tools/build/feature/test-libbabeltrace.c
>   create mode 100644 tools/build/feature/test-libbfd.c
>   create mode 100644 tools/build/feature/test-libdw-dwarf-unwind.c
>   create mode 100644 tools/build/feature/test-libelf-getphdrnum.c
>   create mode 100644 tools/build/feature/test-libelf-mmap.c
>   create mode 100644 tools/build/feature/test-libelf.c
>   create mode 100644 tools/build/feature/test-libnuma.c
>   create mode 100644 tools/build/feature/test-libperl.c
>   create mode 100644 tools/build/feature/test-libpython-version.c
>   create mode 100644 tools/build/feature/test-libpython.c
>   create mode 100644 tools/build/feature/test-libslang.c
>   create mode 100644 tools/build/feature/test-libunwind-debug-frame.c
>   create mode 100644 tools/build/feature/test-libunwind.c
>   create mode 100644 tools/build/feature/test-pthread-attr-setaffinity-np.c
>   create mode 100644 tools/build/feature/test-stackprotector-all.c
>   create mode 100644 tools/build/feature/test-sync-compare-and-swap.c
>   create mode 100644 tools/build/feature/test-timerfd.c
>   create mode 100644 tools/build/feature/test-zlib.c
>   delete mode 100644 tools/perf/config/Makefile.feature
>   delete mode 100644 tools/perf/config/feature-checks/.gitignore
>   delete mode 100644 tools/perf/config/feature-checks/Makefile
>   delete mode 100644 tools/perf/config/feature-checks/test-all.c
>   delete mode 100644 tools/perf/config/feature-checks/test-backtrace.c
>   delete mode 100644 tools/perf/config/feature-checks/test-bionic.c
>   delete mode 100644 tools/perf/config/feature-checks/test-compile.c
>   delete mode 100644 tools/perf/config/feature-checks/test-cplus-demangle.c
>   delete mode 100644 tools/perf/config/feature-checks/test-dwarf.c
>   delete mode 100644 tools/perf/config/feature-checks/test-fortify-source.c
>   delete mode 100644 tools/perf/config/feature-checks/test-glibc.c
>   delete mode 100644 tools/perf/config/feature-checks/test-gtk2-infobar.c
>   delete mode 100644 tools/perf/config/feature-checks/test-gtk2.c
>   delete mode 100644 tools/perf/config/feature-checks/test-hello.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libaudit.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libbabeltrace.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libbfd.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libelf-getphdrnum.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libelf-mmap.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libelf.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libnuma.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libperl.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libpython-version.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libpython.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libslang.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libunwind-debug-frame.c
>   delete mode 100644 tools/perf/config/feature-checks/test-libunwind.c
>   delete mode 100644 tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
>   delete mode 100644 tools/perf/config/feature-checks/test-stackprotector-all.c
>   delete mode 100644 tools/perf/config/feature-checks/test-sync-compare-and-swap.c
>   delete mode 100644 tools/perf/config/feature-checks/test-timerfd.c
>   delete mode 100644 tools/perf/config/feature-checks/test-zlib.c
>
> diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
> new file mode 100644
> index 000000000000..3249fad27993
> --- /dev/null
> +++ b/tools/build/Makefile.feature
> @@ -0,0 +1,171 @@
> +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) 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)
> +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 =			\
> +	backtrace			\
> +	dwarf				\
> +	fortify-source			\
> +	sync-compare-and-swap		\
> +	glibc				\
> +	gtk2				\
> +	gtk2-infobar			\
> +	libaudit			\
> +	libbfd				\
> +	libelf				\
> +	libelf-getphdrnum		\
> +	libelf-mmap			\
> +	libnuma				\
> +	libperl				\
> +	libpython			\
> +	libpython-version		\
> +	libslang			\
> +	libunwind			\
> +	pthread-attr-setaffinity-np	\
> +	stackprotector-all		\
> +	timerfd				\
> +	libdw-dwarf-unwind		\
> +	libbabeltrace			\
> +	zlib
> +
> +FEATURE_DISPLAY =			\
> +	dwarf				\
> +	glibc				\
> +	gtk2				\
> +	libaudit			\
> +	libbfd				\
> +	libelf				\
> +	libnuma				\
> +	libperl				\
> +	libpython			\
> +	libslang			\
> +	libunwind			\
> +	libdw-dwarf-unwind		\
> +	libbabeltrace			\
> +	zlib
> +
> +# 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)))
> +else
> +  $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1)
> +  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
> +endif
> +
> +#
> +# Print the result of the feature test:
> +#
> +feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
> +
> +define feature_print_status_code
> +  ifeq ($(feature-$(1)), 1)
> +    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
> +  else
> +    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
> +  endif
> +endef
> +
> +feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
> +define feature_print_text_code
> +    MSG = $(shell printf '...%30s: %s' $(1) $(2))
> +endef
> +
> +FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
> +FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP)
> +
> +ifeq ($(dwarf-post-unwind),1)
> +  FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
> +endif
> +
> +# 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 file)
> +# - one of the $(FEATURE_DISPLAY) is not detected
> +# - VF is enabled
> +
> +ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)")
> +  $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP)
> +  feature_display := 1
> +endif
> +
> +feature_check = $(eval $(feature_check_code))
> +define feature_check_code
> +  ifneq ($(feature-$(1)), 1)
> +    feature_display := 1
> +  endif
> +endef
> +
> +$(foreach feat,$(FEATURE_DISPLAY),$(call feature_check,$(feat)))
> +
> +ifeq ($(VF),1)
> +  feature_display := 1
> +  feature_verbose := 1
> +endif
> +
> +ifeq ($(feature_display),1)
> +  $(info )
> +  $(info Auto-detecting system features:)
> +  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
> +
> +  ifeq ($(dwarf-post-unwind),1)
> +    $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
> +  endif
> +
> +  ifneq ($(feature_verbose),1)
> +    $(info )
> +  endif
> +endif
> +
> +ifeq ($(feature_verbose),1)
> +  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
> +  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
> +  $(info )
> +endif
> diff --git a/tools/build/feature/.gitignore b/tools/build/feature/.gitignore
> new file mode 100644
> index 000000000000..80f3da0c3515
> --- /dev/null
> +++ b/tools/build/feature/.gitignore
> @@ -0,0 +1,2 @@
> +*.d
> +*.bin
> diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> new file mode 100644
> index 000000000000..8fe067864957
> --- /dev/null
> +++ b/tools/build/feature/Makefile
> @@ -0,0 +1,159 @@
> +
> +FILES=					\
> +	test-all.bin			\
> +	test-backtrace.bin		\
> +	test-bionic.bin			\
> +	test-dwarf.bin			\
> +	test-fortify-source.bin		\
> +	test-sync-compare-and-swap.bin	\
> +	test-glibc.bin			\
> +	test-gtk2.bin			\
> +	test-gtk2-infobar.bin		\
> +	test-hello.bin			\
> +	test-libaudit.bin		\
> +	test-libbfd.bin			\
> +	test-liberty.bin		\
> +	test-liberty-z.bin		\
> +	test-cplus-demangle.bin		\
> +	test-libelf.bin			\
> +	test-libelf-getphdrnum.bin	\
> +	test-libelf-mmap.bin		\
> +	test-libnuma.bin		\
> +	test-libperl.bin		\
> +	test-libpython.bin		\
> +	test-libpython-version.bin	\
> +	test-libslang.bin		\
> +	test-libunwind.bin		\
> +	test-libunwind-debug-frame.bin	\
> +	test-pthread-attr-setaffinity-np.bin	\
> +	test-stackprotector-all.bin	\
> +	test-timerfd.bin		\
> +	test-libdw-dwarf-unwind.bin	\
> +	test-libbabeltrace.bin		\
> +	test-compile-32.bin		\
> +	test-compile-x32.bin		\
> +	test-zlib.bin
> +
> +CC := $(CROSS_COMPILE)gcc -MD
> +PKG_CONFIG := $(CROSS_COMPILE)pkg-config
> +
> +all: $(FILES)
> +
> +BUILD = $(CC) $(CFLAGS) -Wall -Werror -o $(OUTPUT)$@ $(patsubst %.bin,%.c,$@) $(LDFLAGS)
> +
> +###############################
> +
> +test-all.bin:
> +	$(BUILD) -fstack-protector-all -O2 -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma -lelf -laudit -I/usr/include/slang -lslang $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl -lz -lbabeltrace
> +
> +test-hello.bin:
> +	$(BUILD)
> +
> +test-pthread-attr-setaffinity-np.bin:
> +	$(BUILD) -D_GNU_SOURCE -lpthread
> +
> +test-stackprotector-all.bin:
> +	$(BUILD) -fstack-protector-all
> +
> +test-fortify-source.bin:
> +	$(BUILD) -O2 -D_FORTIFY_SOURCE=2
> +
> +test-bionic.bin:
> +	$(BUILD)
> +
> +test-libelf.bin:
> +	$(BUILD) -lelf
> +
> +test-glibc.bin:
> +	$(BUILD)
> +
> +test-dwarf.bin:
> +	$(BUILD) -ldw
> +
> +test-libelf-mmap.bin:
> +	$(BUILD) -lelf
> +
> +test-libelf-getphdrnum.bin:
> +	$(BUILD) -lelf
> +
> +test-libnuma.bin:
> +	$(BUILD) -lnuma
> +
> +test-libunwind.bin:
> +	$(BUILD) -lelf
> +
> +test-libunwind-debug-frame.bin:
> +	$(BUILD) -lelf
> +
> +test-libaudit.bin:
> +	$(BUILD) -laudit
> +
> +test-libslang.bin:
> +	$(BUILD) -I/usr/include/slang -lslang
> +
> +test-gtk2.bin:
> +	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
> +
> +test-gtk2-infobar.bin:
> +	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
> +
> +grep-libs  = $(filter -l%,$(1))
> +strip-libs = $(filter-out -l%,$(1))
> +
> +PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
> +PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
> +PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
> +PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
> +FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
> +
> +test-libperl.bin:
> +	$(BUILD) $(FLAGS_PERL_EMBED)
> +
> +test-libpython.bin:
> +	$(BUILD)
> +
> +test-libpython-version.bin:
> +	$(BUILD)
> +
> +test-libbfd.bin:
> +	$(BUILD) -DPACKAGE='"perf"' -lbfd -lz -liberty -ldl
> +
> +test-liberty.bin:
> +	$(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty
> +
> +test-liberty-z.bin:
> +	$(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty -lz
> +
> +test-cplus-demangle.bin:
> +	$(BUILD) -liberty
> +
> +test-backtrace.bin:
> +	$(BUILD)
> +
> +test-timerfd.bin:
> +	$(BUILD)
> +
> +test-libdw-dwarf-unwind.bin:
> +	$(BUILD) # -ldw provided by $(FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind)
> +
> +test-libbabeltrace.bin:
> +	$(BUILD) # -lbabeltrace provided by $(FEATURE_CHECK_LDFLAGS-libbabeltrace)
> +
> +test-sync-compare-and-swap.bin:
> +	$(BUILD)
> +
> +test-compile-32.bin:
> +	$(CC) -m32 -o $(OUTPUT)$@ test-compile.c
> +
> +test-compile-x32.bin:
> +	$(CC) -mx32 -o $(OUTPUT)$@ test-compile.c
> +
> +test-zlib.bin:
> +	$(BUILD) -lz
> +
> +-include *.d
> +
> +###############################
> +
> +clean:
> +	rm -f $(FILES) *.d
> diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
> new file mode 100644
> index 000000000000..1ffc3da5ca10
> --- /dev/null
> +++ b/tools/build/feature/test-all.c
> @@ -0,0 +1,136 @@
> +/*
> + * test-all.c: Try to build all the main testcases at once.
> + *
> + * A well-configured system will have all the prereqs installed, so we can speed
> + * up auto-detection on such systems.
> + */
> +
> +/*
> + * Quirk: Python and Perl headers cannot be in arbitrary places, so keep
> + * these 3 testcases at the top:
> + */
> +#define main main_test_libpython
> +# include "test-libpython.c"
> +#undef main
> +
> +#define main main_test_libpython_version
> +# include "test-libpython-version.c"
> +#undef main
> +
> +#define main main_test_libperl
> +# include "test-libperl.c"
> +#undef main
> +
> +#define main main_test_hello
> +# include "test-hello.c"
> +#undef main
> +
> +#define main main_test_libelf
> +# include "test-libelf.c"
> +#undef main
> +
> +#define main main_test_libelf_mmap
> +# include "test-libelf-mmap.c"
> +#undef main
> +
> +#define main main_test_glibc
> +# include "test-glibc.c"
> +#undef main
> +
> +#define main main_test_dwarf
> +# include "test-dwarf.c"
> +#undef main
> +
> +#define main main_test_libelf_getphdrnum
> +# include "test-libelf-getphdrnum.c"
> +#undef main
> +
> +#define main main_test_libunwind
> +# include "test-libunwind.c"
> +#undef main
> +
> +#define main main_test_libaudit
> +# include "test-libaudit.c"
> +#undef main
> +
> +#define main main_test_libslang
> +# include "test-libslang.c"
> +#undef main
> +
> +#define main main_test_gtk2
> +# include "test-gtk2.c"
> +#undef main
> +
> +#define main main_test_gtk2_infobar
> +# include "test-gtk2-infobar.c"
> +#undef main
> +
> +#define main main_test_libbfd
> +# include "test-libbfd.c"
> +#undef main
> +
> +#define main main_test_backtrace
> +# include "test-backtrace.c"
> +#undef main
> +
> +#define main main_test_libnuma
> +# include "test-libnuma.c"
> +#undef main
> +
> +#define main main_test_timerfd
> +# include "test-timerfd.c"
> +#undef main
> +
> +#define main main_test_stackprotector_all
> +# include "test-stackprotector-all.c"
> +#undef main
> +
> +#define main main_test_libdw_dwarf_unwind
> +# include "test-libdw-dwarf-unwind.c"
> +#undef main
> +
> +#define main main_test_sync_compare_and_swap
> +# include "test-sync-compare-and-swap.c"
> +#undef main
> +
> +#define main main_test_zlib
> +# include "test-zlib.c"
> +#undef main
> +
> +#define main main_test_pthread_attr_setaffinity_np
> +# include "test-pthread_attr_setaffinity_np.c"
> +#undef main
> +
> +#define main main_test_libbabeltrace
> +# include "test-libbabeltrace.c"
> +#undef main
> +
> +int main(int argc, char *argv[])
> +{
> +	main_test_libpython();
> +	main_test_libpython_version();
> +	main_test_libperl();
> +	main_test_hello();
> +	main_test_libelf();
> +	main_test_libelf_mmap();
> +	main_test_glibc();
> +	main_test_dwarf();
> +	main_test_libelf_getphdrnum();
> +	main_test_libunwind();
> +	main_test_libaudit();
> +	main_test_libslang();
> +	main_test_gtk2(argc, argv);
> +	main_test_gtk2_infobar(argc, argv);
> +	main_test_libbfd();
> +	main_test_backtrace();
> +	main_test_libnuma();
> +	main_test_timerfd();
> +	main_test_stackprotector_all();
> +	main_test_libdw_dwarf_unwind();
> +	main_test_sync_compare_and_swap(argc, argv);
> +	main_test_zlib();
> +	main_test_pthread_attr_setaffinity_np();
> +	main_test_libbabeltrace();
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-backtrace.c b/tools/build/feature/test-backtrace.c
> new file mode 100644
> index 000000000000..7124aa1dc8fb
> --- /dev/null
> +++ b/tools/build/feature/test-backtrace.c
> @@ -0,0 +1,13 @@
> +#include <execinfo.h>
> +#include <stdio.h>
> +
> +int main(void)
> +{
> +	void *backtrace_fns[10];
> +	size_t entries;
> +
> +	entries = backtrace(backtrace_fns, 10);
> +	backtrace_symbols_fd(backtrace_fns, entries, 1);
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-bionic.c b/tools/build/feature/test-bionic.c
> new file mode 100644
> index 000000000000..eac24e9513eb
> --- /dev/null
> +++ b/tools/build/feature/test-bionic.c
> @@ -0,0 +1,6 @@
> +#include <android/api-level.h>
> +
> +int main(void)
> +{
> +	return __ANDROID_API__;
> +}
> diff --git a/tools/build/feature/test-compile.c b/tools/build/feature/test-compile.c
> new file mode 100644
> index 000000000000..31dbf45bf99c
> --- /dev/null
> +++ b/tools/build/feature/test-compile.c
> @@ -0,0 +1,4 @@
> +int main(void)
> +{
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-cplus-demangle.c b/tools/build/feature/test-cplus-demangle.c
> new file mode 100644
> index 000000000000..610c686e0009
> --- /dev/null
> +++ b/tools/build/feature/test-cplus-demangle.c
> @@ -0,0 +1,14 @@
> +extern int printf(const char *format, ...);
> +extern char *cplus_demangle(const char *, int);
> +
> +int main(void)
> +{
> +	char symbol[4096] = "FieldName__9ClassNameFd";
> +	char *tmp;
> +
> +	tmp = cplus_demangle(symbol, 0);
> +
> +	printf("demangled symbol: {%s}\n", tmp);
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-dwarf.c b/tools/build/feature/test-dwarf.c
> new file mode 100644
> index 000000000000..3fc1801ce4a9
> --- /dev/null
> +++ b/tools/build/feature/test-dwarf.c
> @@ -0,0 +1,10 @@
> +#include <dwarf.h>
> +#include <elfutils/libdw.h>
> +#include <elfutils/version.h>
> +
> +int main(void)
> +{
> +	Dwarf *dbg = dwarf_begin(0, DWARF_C_READ);
> +
> +	return (long)dbg;
> +}
> diff --git a/tools/build/feature/test-fortify-source.c b/tools/build/feature/test-fortify-source.c
> new file mode 100644
> index 000000000000..c9f398d87868
> --- /dev/null
> +++ b/tools/build/feature/test-fortify-source.c
> @@ -0,0 +1,6 @@
> +#include <stdio.h>
> +
> +int main(void)
> +{
> +	return puts("hi");
> +}
> diff --git a/tools/build/feature/test-glibc.c b/tools/build/feature/test-glibc.c
> new file mode 100644
> index 000000000000..b0820345cd98
> --- /dev/null
> +++ b/tools/build/feature/test-glibc.c
> @@ -0,0 +1,8 @@
> +#include <gnu/libc-version.h>
> +
> +int main(void)
> +{
> +	const char *version = gnu_get_libc_version();
> +
> +	return (long)version;
> +}
> diff --git a/tools/build/feature/test-gtk2-infobar.c b/tools/build/feature/test-gtk2-infobar.c
> new file mode 100644
> index 000000000000..397b4646d066
> --- /dev/null
> +++ b/tools/build/feature/test-gtk2-infobar.c
> @@ -0,0 +1,11 @@
> +#pragma GCC diagnostic ignored "-Wstrict-prototypes"
> +#include <gtk/gtk.h>
> +#pragma GCC diagnostic error "-Wstrict-prototypes"
> +
> +int main(int argc, char *argv[])
> +{
> +	gtk_init(&argc, &argv);
> +	gtk_info_bar_new();
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-gtk2.c b/tools/build/feature/test-gtk2.c
> new file mode 100644
> index 000000000000..6bd80e509439
> --- /dev/null
> +++ b/tools/build/feature/test-gtk2.c
> @@ -0,0 +1,10 @@
> +#pragma GCC diagnostic ignored "-Wstrict-prototypes"
> +#include <gtk/gtk.h>
> +#pragma GCC diagnostic error "-Wstrict-prototypes"
> +
> +int main(int argc, char *argv[])
> +{
> +	gtk_init(&argc, &argv);
> +
> +        return 0;
> +}
> diff --git a/tools/build/feature/test-hello.c b/tools/build/feature/test-hello.c
> new file mode 100644
> index 000000000000..c9f398d87868
> --- /dev/null
> +++ b/tools/build/feature/test-hello.c
> @@ -0,0 +1,6 @@
> +#include <stdio.h>
> +
> +int main(void)
> +{
> +	return puts("hi");
> +}
> diff --git a/tools/build/feature/test-libaudit.c b/tools/build/feature/test-libaudit.c
> new file mode 100644
> index 000000000000..afc019f08641
> --- /dev/null
> +++ b/tools/build/feature/test-libaudit.c
> @@ -0,0 +1,10 @@
> +#include <libaudit.h>
> +
> +extern int printf(const char *format, ...);
> +
> +int main(void)
> +{
> +	printf("error message: %s\n", audit_errno_to_name(0));
> +
> +	return audit_open();
> +}
> diff --git a/tools/build/feature/test-libbabeltrace.c b/tools/build/feature/test-libbabeltrace.c
> new file mode 100644
> index 000000000000..3b7dd68a4d52
> --- /dev/null
> +++ b/tools/build/feature/test-libbabeltrace.c
> @@ -0,0 +1,8 @@
> +
> +#include <babeltrace/ctf-writer/writer.h>
> +
> +int main(void)
> +{
> +	bt_ctf_stream_class_get_packet_context_type((void *) 0);
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libbfd.c b/tools/build/feature/test-libbfd.c
> new file mode 100644
> index 000000000000..24059907e990
> --- /dev/null
> +++ b/tools/build/feature/test-libbfd.c
> @@ -0,0 +1,15 @@
> +#include <bfd.h>
> +
> +extern int printf(const char *format, ...);
> +
> +int main(void)
> +{
> +	char symbol[4096] = "FieldName__9ClassNameFd";
> +	char *tmp;
> +
> +	tmp = bfd_demangle(0, symbol, 0);
> +
> +	printf("demangled symbol: {%s}\n", tmp);
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libdw-dwarf-unwind.c b/tools/build/feature/test-libdw-dwarf-unwind.c
> new file mode 100644
> index 000000000000..f676a3ff442a
> --- /dev/null
> +++ b/tools/build/feature/test-libdw-dwarf-unwind.c
> @@ -0,0 +1,13 @@
> +
> +#include <elfutils/libdwfl.h>
> +
> +int main(void)
> +{
> +	/*
> +	 * This function is guarded via: __nonnull_attribute__ (1, 2).
> +	 * Passing '1' as arguments value. This code is never executed,
> +	 * only compiled.
> +	 */
> +	dwfl_thread_getframes((void *) 1, (void *) 1, NULL);
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libelf-getphdrnum.c b/tools/build/feature/test-libelf-getphdrnum.c
> new file mode 100644
> index 000000000000..d710459306c3
> --- /dev/null
> +++ b/tools/build/feature/test-libelf-getphdrnum.c
> @@ -0,0 +1,8 @@
> +#include <libelf.h>
> +
> +int main(void)
> +{
> +	size_t dst;
> +
> +	return elf_getphdrnum(0, &dst);
> +}
> diff --git a/tools/build/feature/test-libelf-mmap.c b/tools/build/feature/test-libelf-mmap.c
> new file mode 100644
> index 000000000000..564427d7ef18
> --- /dev/null
> +++ b/tools/build/feature/test-libelf-mmap.c
> @@ -0,0 +1,8 @@
> +#include <libelf.h>
> +
> +int main(void)
> +{
> +	Elf *elf = elf_begin(0, ELF_C_READ_MMAP, 0);
> +
> +	return (long)elf;
> +}
> diff --git a/tools/build/feature/test-libelf.c b/tools/build/feature/test-libelf.c
> new file mode 100644
> index 000000000000..08db322d8957
> --- /dev/null
> +++ b/tools/build/feature/test-libelf.c
> @@ -0,0 +1,8 @@
> +#include <libelf.h>
> +
> +int main(void)
> +{
> +	Elf *elf = elf_begin(0, ELF_C_READ, 0);
> +
> +	return (long)elf;
> +}
> diff --git a/tools/build/feature/test-libnuma.c b/tools/build/feature/test-libnuma.c
> new file mode 100644
> index 000000000000..4763d9cd587d
> --- /dev/null
> +++ b/tools/build/feature/test-libnuma.c
> @@ -0,0 +1,9 @@
> +#include <numa.h>
> +#include <numaif.h>
> +
> +int main(void)
> +{
> +	numa_available();
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libperl.c b/tools/build/feature/test-libperl.c
> new file mode 100644
> index 000000000000..8871f6a0fdb4
> --- /dev/null
> +++ b/tools/build/feature/test-libperl.c
> @@ -0,0 +1,9 @@
> +#include <EXTERN.h>
> +#include <perl.h>
> +
> +int main(void)
> +{
> +	perl_alloc();
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libpython-version.c b/tools/build/feature/test-libpython-version.c
> new file mode 100644
> index 000000000000..facea122d812
> --- /dev/null
> +++ b/tools/build/feature/test-libpython-version.c
> @@ -0,0 +1,10 @@
> +#include <Python.h>
> +
> +#if PY_VERSION_HEX >= 0x03000000
> +	#error
> +#endif
> +
> +int main(void)
> +{
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libpython.c b/tools/build/feature/test-libpython.c
> new file mode 100644
> index 000000000000..b24b28ad6324
> --- /dev/null
> +++ b/tools/build/feature/test-libpython.c
> @@ -0,0 +1,8 @@
> +#include <Python.h>
> +
> +int main(void)
> +{
> +	Py_Initialize();
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libslang.c b/tools/build/feature/test-libslang.c
> new file mode 100644
> index 000000000000..22ff22ed94d1
> --- /dev/null
> +++ b/tools/build/feature/test-libslang.c
> @@ -0,0 +1,6 @@
> +#include <slang.h>
> +
> +int main(void)
> +{
> +	return SLsmg_init_smg();
> +}
> diff --git a/tools/build/feature/test-libunwind-debug-frame.c b/tools/build/feature/test-libunwind-debug-frame.c
> new file mode 100644
> index 000000000000..0ef8087a104a
> --- /dev/null
> +++ b/tools/build/feature/test-libunwind-debug-frame.c
> @@ -0,0 +1,16 @@
> +#include <libunwind.h>
> +#include <stdlib.h>
> +
> +extern int
> +UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
> +				 unw_word_t ip, unw_word_t segbase,
> +				 const char *obj_name, unw_word_t start,
> +				 unw_word_t end);
> +
> +#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
> +
> +int main(void)
> +{
> +	dwarf_find_debug_frame(0, NULL, 0, 0, NULL, 0, 0);
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-libunwind.c b/tools/build/feature/test-libunwind.c
> new file mode 100644
> index 000000000000..43b9369bcab7
> --- /dev/null
> +++ b/tools/build/feature/test-libunwind.c
> @@ -0,0 +1,27 @@
> +#include <libunwind.h>
> +#include <stdlib.h>
> +
> +extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
> +                                      unw_word_t ip,
> +                                      unw_dyn_info_t *di,
> +                                      unw_proc_info_t *pi,
> +                                      int need_unwind_info, void *arg);
> +
> +
> +#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
> +
> +static unw_accessors_t accessors;
> +
> +int main(void)
> +{
> +	unw_addr_space_t addr_space;
> +
> +	addr_space = unw_create_addr_space(&accessors, 0);
> +	if (addr_space)
> +		return 0;
> +
> +	unw_init_remote(NULL, addr_space, NULL);
> +	dwarf_search_unwind_table(addr_space, 0, NULL, NULL, 0, NULL);
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-pthread-attr-setaffinity-np.c b/tools/build/feature/test-pthread-attr-setaffinity-np.c
> new file mode 100644
> index 000000000000..fdada5e8d454
> --- /dev/null
> +++ b/tools/build/feature/test-pthread-attr-setaffinity-np.c
> @@ -0,0 +1,17 @@
> +#include <stdint.h>
> +#include <pthread.h>
> +#include <sched.h>
> +
> +int main(void)
> +{
> +	int ret = 0;
> +	pthread_attr_t thread_attr;
> +	cpu_set_t cs;
> +
> +	pthread_attr_init(&thread_attr);
> +	CPU_ZERO(&cs);
> +
> +	ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cs), &cs);
> +
> +	return ret;
> +}
> diff --git a/tools/build/feature/test-stackprotector-all.c b/tools/build/feature/test-stackprotector-all.c
> new file mode 100644
> index 000000000000..c9f398d87868
> --- /dev/null
> +++ b/tools/build/feature/test-stackprotector-all.c
> @@ -0,0 +1,6 @@
> +#include <stdio.h>
> +
> +int main(void)
> +{
> +	return puts("hi");
> +}
> diff --git a/tools/build/feature/test-sync-compare-and-swap.c b/tools/build/feature/test-sync-compare-and-swap.c
> new file mode 100644
> index 000000000000..c34d4ca4af56
> --- /dev/null
> +++ b/tools/build/feature/test-sync-compare-and-swap.c
> @@ -0,0 +1,14 @@
> +#include <stdint.h>
> +
> +volatile uint64_t x;
> +
> +int main(int argc, char *argv[])
> +{
> +	uint64_t old, new = argc;
> +
> +	argv = argv;
> +	do {
> +		old = __sync_val_compare_and_swap(&x, 0, 0);
> +	} while (!__sync_bool_compare_and_swap(&x, old, new));
> +	return old == new;
> +}
> diff --git a/tools/build/feature/test-timerfd.c b/tools/build/feature/test-timerfd.c
> new file mode 100644
> index 000000000000..8c5c083b4d3c
> --- /dev/null
> +++ b/tools/build/feature/test-timerfd.c
> @@ -0,0 +1,18 @@
> +/*
> + * test for timerfd functions used by perf-kvm-stat-live
> + */
> +#include <sys/timerfd.h>
> +
> +int main(void)
> +{
> +	struct itimerspec new_value;
> +
> +	int fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
> +	if (fd < 0)
> +		return 1;
> +
> +	if (timerfd_settime(fd, 0, &new_value, NULL) != 0)
> +		return 1;
> +
> +	return 0;
> +}
> diff --git a/tools/build/feature/test-zlib.c b/tools/build/feature/test-zlib.c
> new file mode 100644
> index 000000000000..e111fff6240e
> --- /dev/null
> +++ b/tools/build/feature/test-zlib.c
> @@ -0,0 +1,9 @@
> +#include <zlib.h>
> +
> +int main(void)
> +{
> +	z_stream zs;
> +
> +	inflateInit(&zs);
> +	return 0;
> +}
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index e323eab10694..d5b9e0dae334 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -521,7 +521,7 @@ $(INSTALL_DOC_TARGETS):
>   #
>   config-clean:
>   	$(call QUIET_CLEAN, config)
> -	$(Q)$(MAKE) -C config/feature-checks clean >/dev/null
> +	$(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null
>
>   clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean config-clean
>   	$(call QUIET_CLEAN, core-objs)  $(RM) $(LIB_FILE) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(LANG_BINDINGS)
> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> index 01d8acc5453e..df666a596c2a 100644
> --- a/tools/perf/config/Makefile
> +++ b/tools/perf/config/Makefile
> @@ -176,7 +176,7 @@ LDFLAGS += -Wl,-z,noexecstack
>
>   EXTLIBS = -lpthread -lrt -lm -ldl
>
> -include $(src-perf)/config/Makefile.feature
> +include $(srctree)/tools/build/Makefile.feature
>
>   ifeq ($(feature-stackprotector-all), 1)
>     CFLAGS += -fstack-protector-all
> diff --git a/tools/perf/config/Makefile.feature b/tools/perf/config/Makefile.feature
> deleted file mode 100644
> index 55b671a93d67..000000000000
> --- a/tools/perf/config/Makefile.feature
> +++ /dev/null
> @@ -1,171 +0,0 @@
> -feature_dir := $(srctree)/tools/perf/config/feature-checks
> -
> -ifneq ($(OUTPUT),)
> -  OUTPUT_FEATURES = $(OUTPUT)config/feature-checks/
> -  $(shell mkdir -p $(OUTPUT_FEATURES))
> -endif
> -
> -feature_check = $(eval $(feature_check_code))
> -define feature_check_code
> -  feature-$(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)
> -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 =			\
> -	backtrace			\
> -	dwarf				\
> -	fortify-source			\
> -	sync-compare-and-swap		\
> -	glibc				\
> -	gtk2				\
> -	gtk2-infobar			\
> -	libaudit			\
> -	libbfd				\
> -	libelf				\
> -	libelf-getphdrnum		\
> -	libelf-mmap			\
> -	libnuma				\
> -	libperl				\
> -	libpython			\
> -	libpython-version		\
> -	libslang			\
> -	libunwind			\
> -	pthread-attr-setaffinity-np	\
> -	stackprotector-all		\
> -	timerfd				\
> -	libdw-dwarf-unwind		\
> -	libbabeltrace			\
> -	zlib
> -
> -FEATURE_DISPLAY =			\
> -	dwarf				\
> -	glibc				\
> -	gtk2				\
> -	libaudit			\
> -	libbfd				\
> -	libelf				\
> -	libnuma				\
> -	libperl				\
> -	libpython			\
> -	libslang			\
> -	libunwind			\
> -	libdw-dwarf-unwind		\
> -	libbabeltrace			\
> -	zlib
> -
> -# 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)))
> -else
> -  $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1)
> -  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
> -endif
> -
> -#
> -# Print the result of the feature test:
> -#
> -feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
> -
> -define feature_print_status_code
> -  ifeq ($(feature-$(1)), 1)
> -    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
> -  else
> -    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
> -  endif
> -endef
> -
> -feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
> -define feature_print_text_code
> -    MSG = $(shell printf '...%30s: %s' $(1) $(2))
> -endef
> -
> -FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
> -FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP)
> -
> -ifeq ($(dwarf-post-unwind),1)
> -  FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
> -endif
> -
> -# 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 file)
> -# - one of the $(FEATURE_DISPLAY) is not detected
> -# - VF is enabled
> -
> -ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)")
> -  $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP)
> -  feature_display := 1
> -endif
> -
> -feature_check = $(eval $(feature_check_code))
> -define feature_check_code
> -  ifneq ($(feature-$(1)), 1)
> -    feature_display := 1
> -  endif
> -endef
> -
> -$(foreach feat,$(FEATURE_DISPLAY),$(call feature_check,$(feat)))
> -
> -ifeq ($(VF),1)
> -  feature_display := 1
> -  feature_verbose := 1
> -endif
> -
> -ifeq ($(feature_display),1)
> -  $(info )
> -  $(info Auto-detecting system features:)
> -  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
> -
> -  ifeq ($(dwarf-post-unwind),1)
> -    $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
> -  endif
> -
> -  ifneq ($(feature_verbose),1)
> -    $(info )
> -  endif
> -endif
> -
> -ifeq ($(feature_verbose),1)
> -  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
> -  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
> -  $(info )
> -endif
> diff --git a/tools/perf/config/feature-checks/.gitignore b/tools/perf/config/feature-checks/.gitignore
> deleted file mode 100644
> index 80f3da0c3515..000000000000
> --- a/tools/perf/config/feature-checks/.gitignore
> +++ /dev/null
> @@ -1,2 +0,0 @@
> -*.d
> -*.bin
> diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
> deleted file mode 100644
> index 8fe067864957..000000000000
> --- a/tools/perf/config/feature-checks/Makefile
> +++ /dev/null
> @@ -1,159 +0,0 @@
> -
> -FILES=					\
> -	test-all.bin			\
> -	test-backtrace.bin		\
> -	test-bionic.bin			\
> -	test-dwarf.bin			\
> -	test-fortify-source.bin		\
> -	test-sync-compare-and-swap.bin	\
> -	test-glibc.bin			\
> -	test-gtk2.bin			\
> -	test-gtk2-infobar.bin		\
> -	test-hello.bin			\
> -	test-libaudit.bin		\
> -	test-libbfd.bin			\
> -	test-liberty.bin		\
> -	test-liberty-z.bin		\
> -	test-cplus-demangle.bin		\
> -	test-libelf.bin			\
> -	test-libelf-getphdrnum.bin	\
> -	test-libelf-mmap.bin		\
> -	test-libnuma.bin		\
> -	test-libperl.bin		\
> -	test-libpython.bin		\
> -	test-libpython-version.bin	\
> -	test-libslang.bin		\
> -	test-libunwind.bin		\
> -	test-libunwind-debug-frame.bin	\
> -	test-pthread-attr-setaffinity-np.bin	\
> -	test-stackprotector-all.bin	\
> -	test-timerfd.bin		\
> -	test-libdw-dwarf-unwind.bin	\
> -	test-libbabeltrace.bin		\
> -	test-compile-32.bin		\
> -	test-compile-x32.bin		\
> -	test-zlib.bin
> -
> -CC := $(CROSS_COMPILE)gcc -MD
> -PKG_CONFIG := $(CROSS_COMPILE)pkg-config
> -
> -all: $(FILES)
> -
> -BUILD = $(CC) $(CFLAGS) -Wall -Werror -o $(OUTPUT)$@ $(patsubst %.bin,%.c,$@) $(LDFLAGS)
> -
> -###############################
> -
> -test-all.bin:
> -	$(BUILD) -fstack-protector-all -O2 -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma -lelf -laudit -I/usr/include/slang -lslang $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl -lz -lbabeltrace
> -
> -test-hello.bin:
> -	$(BUILD)
> -
> -test-pthread-attr-setaffinity-np.bin:
> -	$(BUILD) -D_GNU_SOURCE -lpthread
> -
> -test-stackprotector-all.bin:
> -	$(BUILD) -fstack-protector-all
> -
> -test-fortify-source.bin:
> -	$(BUILD) -O2 -D_FORTIFY_SOURCE=2
> -
> -test-bionic.bin:
> -	$(BUILD)
> -
> -test-libelf.bin:
> -	$(BUILD) -lelf
> -
> -test-glibc.bin:
> -	$(BUILD)
> -
> -test-dwarf.bin:
> -	$(BUILD) -ldw
> -
> -test-libelf-mmap.bin:
> -	$(BUILD) -lelf
> -
> -test-libelf-getphdrnum.bin:
> -	$(BUILD) -lelf
> -
> -test-libnuma.bin:
> -	$(BUILD) -lnuma
> -
> -test-libunwind.bin:
> -	$(BUILD) -lelf
> -
> -test-libunwind-debug-frame.bin:
> -	$(BUILD) -lelf
> -
> -test-libaudit.bin:
> -	$(BUILD) -laudit
> -
> -test-libslang.bin:
> -	$(BUILD) -I/usr/include/slang -lslang
> -
> -test-gtk2.bin:
> -	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
> -
> -test-gtk2-infobar.bin:
> -	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
> -
> -grep-libs  = $(filter -l%,$(1))
> -strip-libs = $(filter-out -l%,$(1))
> -
> -PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
> -PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
> -PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
> -PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
> -FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
> -
> -test-libperl.bin:
> -	$(BUILD) $(FLAGS_PERL_EMBED)
> -
> -test-libpython.bin:
> -	$(BUILD)
> -
> -test-libpython-version.bin:
> -	$(BUILD)
> -
> -test-libbfd.bin:
> -	$(BUILD) -DPACKAGE='"perf"' -lbfd -lz -liberty -ldl
> -
> -test-liberty.bin:
> -	$(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty
> -
> -test-liberty-z.bin:
> -	$(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty -lz
> -
> -test-cplus-demangle.bin:
> -	$(BUILD) -liberty
> -
> -test-backtrace.bin:
> -	$(BUILD)
> -
> -test-timerfd.bin:
> -	$(BUILD)
> -
> -test-libdw-dwarf-unwind.bin:
> -	$(BUILD) # -ldw provided by $(FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind)
> -
> -test-libbabeltrace.bin:
> -	$(BUILD) # -lbabeltrace provided by $(FEATURE_CHECK_LDFLAGS-libbabeltrace)
> -
> -test-sync-compare-and-swap.bin:
> -	$(BUILD)
> -
> -test-compile-32.bin:
> -	$(CC) -m32 -o $(OUTPUT)$@ test-compile.c
> -
> -test-compile-x32.bin:
> -	$(CC) -mx32 -o $(OUTPUT)$@ test-compile.c
> -
> -test-zlib.bin:
> -	$(BUILD) -lz
> -
> --include *.d
> -
> -###############################
> -
> -clean:
> -	rm -f $(FILES) *.d
> diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
> deleted file mode 100644
> index 1ffc3da5ca10..000000000000
> --- a/tools/perf/config/feature-checks/test-all.c
> +++ /dev/null
> @@ -1,136 +0,0 @@
> -/*
> - * test-all.c: Try to build all the main testcases at once.
> - *
> - * A well-configured system will have all the prereqs installed, so we can speed
> - * up auto-detection on such systems.
> - */
> -
> -/*
> - * Quirk: Python and Perl headers cannot be in arbitrary places, so keep
> - * these 3 testcases at the top:
> - */
> -#define main main_test_libpython
> -# include "test-libpython.c"
> -#undef main
> -
> -#define main main_test_libpython_version
> -# include "test-libpython-version.c"
> -#undef main
> -
> -#define main main_test_libperl
> -# include "test-libperl.c"
> -#undef main
> -
> -#define main main_test_hello
> -# include "test-hello.c"
> -#undef main
> -
> -#define main main_test_libelf
> -# include "test-libelf.c"
> -#undef main
> -
> -#define main main_test_libelf_mmap
> -# include "test-libelf-mmap.c"
> -#undef main
> -
> -#define main main_test_glibc
> -# include "test-glibc.c"
> -#undef main
> -
> -#define main main_test_dwarf
> -# include "test-dwarf.c"
> -#undef main
> -
> -#define main main_test_libelf_getphdrnum
> -# include "test-libelf-getphdrnum.c"
> -#undef main
> -
> -#define main main_test_libunwind
> -# include "test-libunwind.c"
> -#undef main
> -
> -#define main main_test_libaudit
> -# include "test-libaudit.c"
> -#undef main
> -
> -#define main main_test_libslang
> -# include "test-libslang.c"
> -#undef main
> -
> -#define main main_test_gtk2
> -# include "test-gtk2.c"
> -#undef main
> -
> -#define main main_test_gtk2_infobar
> -# include "test-gtk2-infobar.c"
> -#undef main
> -
> -#define main main_test_libbfd
> -# include "test-libbfd.c"
> -#undef main
> -
> -#define main main_test_backtrace
> -# include "test-backtrace.c"
> -#undef main
> -
> -#define main main_test_libnuma
> -# include "test-libnuma.c"
> -#undef main
> -
> -#define main main_test_timerfd
> -# include "test-timerfd.c"
> -#undef main
> -
> -#define main main_test_stackprotector_all
> -# include "test-stackprotector-all.c"
> -#undef main
> -
> -#define main main_test_libdw_dwarf_unwind
> -# include "test-libdw-dwarf-unwind.c"
> -#undef main
> -
> -#define main main_test_sync_compare_and_swap
> -# include "test-sync-compare-and-swap.c"
> -#undef main
> -
> -#define main main_test_zlib
> -# include "test-zlib.c"
> -#undef main
> -
> -#define main main_test_pthread_attr_setaffinity_np
> -# include "test-pthread_attr_setaffinity_np.c"
> -#undef main
> -
> -#define main main_test_libbabeltrace
> -# include "test-libbabeltrace.c"
> -#undef main
> -
> -int main(int argc, char *argv[])
> -{
> -	main_test_libpython();
> -	main_test_libpython_version();
> -	main_test_libperl();
> -	main_test_hello();
> -	main_test_libelf();
> -	main_test_libelf_mmap();
> -	main_test_glibc();
> -	main_test_dwarf();
> -	main_test_libelf_getphdrnum();
> -	main_test_libunwind();
> -	main_test_libaudit();
> -	main_test_libslang();
> -	main_test_gtk2(argc, argv);
> -	main_test_gtk2_infobar(argc, argv);
> -	main_test_libbfd();
> -	main_test_backtrace();
> -	main_test_libnuma();
> -	main_test_timerfd();
> -	main_test_stackprotector_all();
> -	main_test_libdw_dwarf_unwind();
> -	main_test_sync_compare_and_swap(argc, argv);
> -	main_test_zlib();
> -	main_test_pthread_attr_setaffinity_np();
> -	main_test_libbabeltrace();
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-backtrace.c b/tools/perf/config/feature-checks/test-backtrace.c
> deleted file mode 100644
> index 7124aa1dc8fb..000000000000
> --- a/tools/perf/config/feature-checks/test-backtrace.c
> +++ /dev/null
> @@ -1,13 +0,0 @@
> -#include <execinfo.h>
> -#include <stdio.h>
> -
> -int main(void)
> -{
> -	void *backtrace_fns[10];
> -	size_t entries;
> -
> -	entries = backtrace(backtrace_fns, 10);
> -	backtrace_symbols_fd(backtrace_fns, entries, 1);
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-bionic.c b/tools/perf/config/feature-checks/test-bionic.c
> deleted file mode 100644
> index eac24e9513eb..000000000000
> --- a/tools/perf/config/feature-checks/test-bionic.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -#include <android/api-level.h>
> -
> -int main(void)
> -{
> -	return __ANDROID_API__;
> -}
> diff --git a/tools/perf/config/feature-checks/test-compile.c b/tools/perf/config/feature-checks/test-compile.c
> deleted file mode 100644
> index 31dbf45bf99c..000000000000
> --- a/tools/perf/config/feature-checks/test-compile.c
> +++ /dev/null
> @@ -1,4 +0,0 @@
> -int main(void)
> -{
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-cplus-demangle.c b/tools/perf/config/feature-checks/test-cplus-demangle.c
> deleted file mode 100644
> index 610c686e0009..000000000000
> --- a/tools/perf/config/feature-checks/test-cplus-demangle.c
> +++ /dev/null
> @@ -1,14 +0,0 @@
> -extern int printf(const char *format, ...);
> -extern char *cplus_demangle(const char *, int);
> -
> -int main(void)
> -{
> -	char symbol[4096] = "FieldName__9ClassNameFd";
> -	char *tmp;
> -
> -	tmp = cplus_demangle(symbol, 0);
> -
> -	printf("demangled symbol: {%s}\n", tmp);
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-dwarf.c b/tools/perf/config/feature-checks/test-dwarf.c
> deleted file mode 100644
> index 3fc1801ce4a9..000000000000
> --- a/tools/perf/config/feature-checks/test-dwarf.c
> +++ /dev/null
> @@ -1,10 +0,0 @@
> -#include <dwarf.h>
> -#include <elfutils/libdw.h>
> -#include <elfutils/version.h>
> -
> -int main(void)
> -{
> -	Dwarf *dbg = dwarf_begin(0, DWARF_C_READ);
> -
> -	return (long)dbg;
> -}
> diff --git a/tools/perf/config/feature-checks/test-fortify-source.c b/tools/perf/config/feature-checks/test-fortify-source.c
> deleted file mode 100644
> index c9f398d87868..000000000000
> --- a/tools/perf/config/feature-checks/test-fortify-source.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -#include <stdio.h>
> -
> -int main(void)
> -{
> -	return puts("hi");
> -}
> diff --git a/tools/perf/config/feature-checks/test-glibc.c b/tools/perf/config/feature-checks/test-glibc.c
> deleted file mode 100644
> index b0820345cd98..000000000000
> --- a/tools/perf/config/feature-checks/test-glibc.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -#include <gnu/libc-version.h>
> -
> -int main(void)
> -{
> -	const char *version = gnu_get_libc_version();
> -
> -	return (long)version;
> -}
> diff --git a/tools/perf/config/feature-checks/test-gtk2-infobar.c b/tools/perf/config/feature-checks/test-gtk2-infobar.c
> deleted file mode 100644
> index 397b4646d066..000000000000
> --- a/tools/perf/config/feature-checks/test-gtk2-infobar.c
> +++ /dev/null
> @@ -1,11 +0,0 @@
> -#pragma GCC diagnostic ignored "-Wstrict-prototypes"
> -#include <gtk/gtk.h>
> -#pragma GCC diagnostic error "-Wstrict-prototypes"
> -
> -int main(int argc, char *argv[])
> -{
> -	gtk_init(&argc, &argv);
> -	gtk_info_bar_new();
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-gtk2.c b/tools/perf/config/feature-checks/test-gtk2.c
> deleted file mode 100644
> index 6bd80e509439..000000000000
> --- a/tools/perf/config/feature-checks/test-gtk2.c
> +++ /dev/null
> @@ -1,10 +0,0 @@
> -#pragma GCC diagnostic ignored "-Wstrict-prototypes"
> -#include <gtk/gtk.h>
> -#pragma GCC diagnostic error "-Wstrict-prototypes"
> -
> -int main(int argc, char *argv[])
> -{
> -	gtk_init(&argc, &argv);
> -
> -        return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-hello.c b/tools/perf/config/feature-checks/test-hello.c
> deleted file mode 100644
> index c9f398d87868..000000000000
> --- a/tools/perf/config/feature-checks/test-hello.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -#include <stdio.h>
> -
> -int main(void)
> -{
> -	return puts("hi");
> -}
> diff --git a/tools/perf/config/feature-checks/test-libaudit.c b/tools/perf/config/feature-checks/test-libaudit.c
> deleted file mode 100644
> index afc019f08641..000000000000
> --- a/tools/perf/config/feature-checks/test-libaudit.c
> +++ /dev/null
> @@ -1,10 +0,0 @@
> -#include <libaudit.h>
> -
> -extern int printf(const char *format, ...);
> -
> -int main(void)
> -{
> -	printf("error message: %s\n", audit_errno_to_name(0));
> -
> -	return audit_open();
> -}
> diff --git a/tools/perf/config/feature-checks/test-libbabeltrace.c b/tools/perf/config/feature-checks/test-libbabeltrace.c
> deleted file mode 100644
> index 3b7dd68a4d52..000000000000
> --- a/tools/perf/config/feature-checks/test-libbabeltrace.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -
> -#include <babeltrace/ctf-writer/writer.h>
> -
> -int main(void)
> -{
> -	bt_ctf_stream_class_get_packet_context_type((void *) 0);
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libbfd.c b/tools/perf/config/feature-checks/test-libbfd.c
> deleted file mode 100644
> index 24059907e990..000000000000
> --- a/tools/perf/config/feature-checks/test-libbfd.c
> +++ /dev/null
> @@ -1,15 +0,0 @@
> -#include <bfd.h>
> -
> -extern int printf(const char *format, ...);
> -
> -int main(void)
> -{
> -	char symbol[4096] = "FieldName__9ClassNameFd";
> -	char *tmp;
> -
> -	tmp = bfd_demangle(0, symbol, 0);
> -
> -	printf("demangled symbol: {%s}\n", tmp);
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c b/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
> deleted file mode 100644
> index f676a3ff442a..000000000000
> --- a/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
> +++ /dev/null
> @@ -1,13 +0,0 @@
> -
> -#include <elfutils/libdwfl.h>
> -
> -int main(void)
> -{
> -	/*
> -	 * This function is guarded via: __nonnull_attribute__ (1, 2).
> -	 * Passing '1' as arguments value. This code is never executed,
> -	 * only compiled.
> -	 */
> -	dwfl_thread_getframes((void *) 1, (void *) 1, NULL);
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libelf-getphdrnum.c b/tools/perf/config/feature-checks/test-libelf-getphdrnum.c
> deleted file mode 100644
> index d710459306c3..000000000000
> --- a/tools/perf/config/feature-checks/test-libelf-getphdrnum.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -#include <libelf.h>
> -
> -int main(void)
> -{
> -	size_t dst;
> -
> -	return elf_getphdrnum(0, &dst);
> -}
> diff --git a/tools/perf/config/feature-checks/test-libelf-mmap.c b/tools/perf/config/feature-checks/test-libelf-mmap.c
> deleted file mode 100644
> index 564427d7ef18..000000000000
> --- a/tools/perf/config/feature-checks/test-libelf-mmap.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -#include <libelf.h>
> -
> -int main(void)
> -{
> -	Elf *elf = elf_begin(0, ELF_C_READ_MMAP, 0);
> -
> -	return (long)elf;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libelf.c b/tools/perf/config/feature-checks/test-libelf.c
> deleted file mode 100644
> index 08db322d8957..000000000000
> --- a/tools/perf/config/feature-checks/test-libelf.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -#include <libelf.h>
> -
> -int main(void)
> -{
> -	Elf *elf = elf_begin(0, ELF_C_READ, 0);
> -
> -	return (long)elf;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libnuma.c b/tools/perf/config/feature-checks/test-libnuma.c
> deleted file mode 100644
> index 4763d9cd587d..000000000000
> --- a/tools/perf/config/feature-checks/test-libnuma.c
> +++ /dev/null
> @@ -1,9 +0,0 @@
> -#include <numa.h>
> -#include <numaif.h>
> -
> -int main(void)
> -{
> -	numa_available();
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libperl.c b/tools/perf/config/feature-checks/test-libperl.c
> deleted file mode 100644
> index 8871f6a0fdb4..000000000000
> --- a/tools/perf/config/feature-checks/test-libperl.c
> +++ /dev/null
> @@ -1,9 +0,0 @@
> -#include <EXTERN.h>
> -#include <perl.h>
> -
> -int main(void)
> -{
> -	perl_alloc();
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libpython-version.c b/tools/perf/config/feature-checks/test-libpython-version.c
> deleted file mode 100644
> index facea122d812..000000000000
> --- a/tools/perf/config/feature-checks/test-libpython-version.c
> +++ /dev/null
> @@ -1,10 +0,0 @@
> -#include <Python.h>
> -
> -#if PY_VERSION_HEX >= 0x03000000
> -	#error
> -#endif
> -
> -int main(void)
> -{
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libpython.c b/tools/perf/config/feature-checks/test-libpython.c
> deleted file mode 100644
> index b24b28ad6324..000000000000
> --- a/tools/perf/config/feature-checks/test-libpython.c
> +++ /dev/null
> @@ -1,8 +0,0 @@
> -#include <Python.h>
> -
> -int main(void)
> -{
> -	Py_Initialize();
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libslang.c b/tools/perf/config/feature-checks/test-libslang.c
> deleted file mode 100644
> index 22ff22ed94d1..000000000000
> --- a/tools/perf/config/feature-checks/test-libslang.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -#include <slang.h>
> -
> -int main(void)
> -{
> -	return SLsmg_init_smg();
> -}
> diff --git a/tools/perf/config/feature-checks/test-libunwind-debug-frame.c b/tools/perf/config/feature-checks/test-libunwind-debug-frame.c
> deleted file mode 100644
> index 0ef8087a104a..000000000000
> --- a/tools/perf/config/feature-checks/test-libunwind-debug-frame.c
> +++ /dev/null
> @@ -1,16 +0,0 @@
> -#include <libunwind.h>
> -#include <stdlib.h>
> -
> -extern int
> -UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
> -				 unw_word_t ip, unw_word_t segbase,
> -				 const char *obj_name, unw_word_t start,
> -				 unw_word_t end);
> -
> -#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
> -
> -int main(void)
> -{
> -	dwarf_find_debug_frame(0, NULL, 0, 0, NULL, 0, 0);
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-libunwind.c b/tools/perf/config/feature-checks/test-libunwind.c
> deleted file mode 100644
> index 43b9369bcab7..000000000000
> --- a/tools/perf/config/feature-checks/test-libunwind.c
> +++ /dev/null
> @@ -1,27 +0,0 @@
> -#include <libunwind.h>
> -#include <stdlib.h>
> -
> -extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
> -                                      unw_word_t ip,
> -                                      unw_dyn_info_t *di,
> -                                      unw_proc_info_t *pi,
> -                                      int need_unwind_info, void *arg);
> -
> -
> -#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
> -
> -static unw_accessors_t accessors;
> -
> -int main(void)
> -{
> -	unw_addr_space_t addr_space;
> -
> -	addr_space = unw_create_addr_space(&accessors, 0);
> -	if (addr_space)
> -		return 0;
> -
> -	unw_init_remote(NULL, addr_space, NULL);
> -	dwarf_search_unwind_table(addr_space, 0, NULL, NULL, 0, NULL);
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
> deleted file mode 100644
> index fdada5e8d454..000000000000
> --- a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
> +++ /dev/null
> @@ -1,17 +0,0 @@
> -#include <stdint.h>
> -#include <pthread.h>
> -#include <sched.h>
> -
> -int main(void)
> -{
> -	int ret = 0;
> -	pthread_attr_t thread_attr;
> -	cpu_set_t cs;
> -
> -	pthread_attr_init(&thread_attr);
> -	CPU_ZERO(&cs);
> -
> -	ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cs), &cs);
> -
> -	return ret;
> -}
> diff --git a/tools/perf/config/feature-checks/test-stackprotector-all.c b/tools/perf/config/feature-checks/test-stackprotector-all.c
> deleted file mode 100644
> index c9f398d87868..000000000000
> --- a/tools/perf/config/feature-checks/test-stackprotector-all.c
> +++ /dev/null
> @@ -1,6 +0,0 @@
> -#include <stdio.h>
> -
> -int main(void)
> -{
> -	return puts("hi");
> -}
> diff --git a/tools/perf/config/feature-checks/test-sync-compare-and-swap.c b/tools/perf/config/feature-checks/test-sync-compare-and-swap.c
> deleted file mode 100644
> index c34d4ca4af56..000000000000
> --- a/tools/perf/config/feature-checks/test-sync-compare-and-swap.c
> +++ /dev/null
> @@ -1,14 +0,0 @@
> -#include <stdint.h>
> -
> -volatile uint64_t x;
> -
> -int main(int argc, char *argv[])
> -{
> -	uint64_t old, new = argc;
> -
> -	argv = argv;
> -	do {
> -		old = __sync_val_compare_and_swap(&x, 0, 0);
> -	} while (!__sync_bool_compare_and_swap(&x, old, new));
> -	return old == new;
> -}
> diff --git a/tools/perf/config/feature-checks/test-timerfd.c b/tools/perf/config/feature-checks/test-timerfd.c
> deleted file mode 100644
> index 8c5c083b4d3c..000000000000
> --- a/tools/perf/config/feature-checks/test-timerfd.c
> +++ /dev/null
> @@ -1,18 +0,0 @@
> -/*
> - * test for timerfd functions used by perf-kvm-stat-live
> - */
> -#include <sys/timerfd.h>
> -
> -int main(void)
> -{
> -	struct itimerspec new_value;
> -
> -	int fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
> -	if (fd < 0)
> -		return 1;
> -
> -	if (timerfd_settime(fd, 0, &new_value, NULL) != 0)
> -		return 1;
> -
> -	return 0;
> -}
> diff --git a/tools/perf/config/feature-checks/test-zlib.c b/tools/perf/config/feature-checks/test-zlib.c
> deleted file mode 100644
> index e111fff6240e..000000000000
> --- a/tools/perf/config/feature-checks/test-zlib.c
> +++ /dev/null
> @@ -1,9 +0,0 @@
> -#include <zlib.h>
> -
> -int main(void)
> -{
> -	z_stream zs;
> -
> -	inflateInit(&zs);
> -	return 0;
> -}
>