linux/tools/build/Makefile.feature
Wang Nan 8135c8c750 tools build: Change FEATURE_TESTS and FEATURE_DISPLAY to weak binding
Replace strong binding of FEATURE_TESTS and FEATURE_DISPLAY by weak
binding. This patch enables other makefiles which include
tools/build/Makefile.feature enable only limited feathres to check.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: 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: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: pi3orama@163.com
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1431860222-61636-5-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-18 12:36:46 -03:00

172 lines
4.5 KiB
Gherkin

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 \
zlib \
lzma
FEATURE_DISPLAY ?= \
dwarf \
glibc \
gtk2 \
libaudit \
libbfd \
libelf \
libnuma \
libperl \
libpython \
libslang \
libunwind \
libdw-dwarf-unwind \
zlib \
lzma
# 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_display_check = $(eval $(feature_check_code))
define feature_display_check_code
ifneq ($(feature-$(1)), 1)
feature_display := 1
endif
endef
$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
ifeq ($(VF),1)
feature_display := 1
feature_verbose := 1
endif
ifeq ($(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