xref: /openbmc/linux/tools/build/Makefile.feature (revision f3539c12) 
1feature_dir := $(srctree)/tools/build/feature
2
3ifneq ($(OUTPUT),)
4  OUTPUT_FEATURES = $(OUTPUT)feature/
5  $(shell mkdir -p $(OUTPUT_FEATURES))
6endif
7
8feature_check = $(eval $(feature_check_code))
9define feature_check_code
10  feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
11endef
12
13feature_set = $(eval $(feature_set_code))
14define feature_set_code
15  feature-$(1) := 1
16endef
17
18#
19# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
20#
21
22#
23# Note that this is not a complete list of all feature tests, just
24# those that are typically built on a fully configured system.
25#
26# [ Feature tests not mentioned here have to be built explicitly in
27#   the rule that uses them - an example for that is the 'bionic'
28#   feature check. ]
29#
30FEATURE_TESTS_BASIC :=			\
31	backtrace			\
32	dwarf				\
33	dwarf_getlocations		\
34	fortify-source			\
35	sync-compare-and-swap		\
36	glibc				\
37	gtk2				\
38	gtk2-infobar			\
39	libaudit			\
40	libbfd				\
41	libelf				\
42	libelf-getphdrnum		\
43	libelf-gelf_getnote		\
44	libelf-getshdrstrndx		\
45	libelf-mmap			\
46	libnuma				\
47	numa_num_possible_cpus		\
48	libperl				\
49	libpython			\
50	libpython-version		\
51	libslang			\
52	libcrypto			\
53	libunwind			\
54	libunwind-x86			\
55	libunwind-x86_64		\
56	libunwind-arm			\
57	libunwind-aarch64		\
58	pthread-attr-setaffinity-np	\
59	stackprotector-all		\
60	timerfd				\
61	libdw-dwarf-unwind		\
62	zlib				\
63	lzma				\
64	get_cpuid			\
65	bpf				\
66	sdt
67
68# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
69# of all feature tests
70FEATURE_TESTS_EXTRA :=			\
71	bionic				\
72	compile-32			\
73	compile-x32			\
74	cplus-demangle			\
75	hello				\
76	libbabeltrace			\
77	liberty				\
78	liberty-z			\
79	libunwind-debug-frame		\
80	libunwind-debug-frame-arm	\
81	libunwind-debug-frame-aarch64
82
83FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
84
85ifeq ($(FEATURE_TESTS),all)
86  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
87endif
88
89FEATURE_DISPLAY ?=			\
90	dwarf				\
91	dwarf_getlocations		\
92	glibc				\
93	gtk2				\
94	libaudit			\
95	libbfd				\
96	libelf				\
97	libnuma				\
98	numa_num_possible_cpus		\
99	libperl				\
100	libpython			\
101	libslang			\
102	libcrypto			\
103	libunwind			\
104	libdw-dwarf-unwind		\
105	zlib				\
106	lzma				\
107	get_cpuid			\
108	bpf
109
110# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
111# If in the future we need per-feature checks/flags for features not
112# mentioned in this list we need to refactor this ;-).
113set_test_all_flags = $(eval $(set_test_all_flags_code))
114define set_test_all_flags_code
115  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
116  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
117endef
118
119$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
120
121#
122# Special fast-path for the 'all features are available' case:
123#
124$(call feature_check,all,$(MSG))
125
126#
127# Just in case the build freshly failed, make sure we print the
128# feature matrix:
129#
130ifeq ($(feature-all), 1)
131  #
132  # test-all.c passed - just set all the core feature flags to 1:
133  #
134  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
135  #
136  # test-all.c does not comprise these tests, so we need to
137  # for this case to get features proper values
138  #
139  $(call feature_check,compile-32)
140  $(call feature_check,compile-x32)
141  $(call feature_check,bionic)
142  $(call feature_check,libbabeltrace)
143else
144  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
145endif
146
147#
148# Print the result of the feature test:
149#
150feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
151
152define feature_print_status_code
153  ifeq ($(feature-$(1)), 1)
154    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
155  else
156    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
157  endif
158endef
159
160feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
161define feature_print_text_code
162    MSG = $(shell printf '...%30s: %s' $(1) $(2))
163endef
164
165#
166# generates feature value assignment for name, like:
167#   $(call feature_assign,dwarf) == feature-dwarf=1
168#
169feature_assign = feature-$(1)=$(feature-$(1))
170
171FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
172FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
173
174feature_dump_check = $(eval $(feature_dump_check_code))
175define feature_dump_check_code
176  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
177    $(2) := 1
178  endif
179endef
180
181#
182# First check if any test from FEATURE_DISPLAY
183# and set feature_display := 1 if it does
184$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
185
186#
187# Now also check if any other test changed,
188# so we force FEATURE-DUMP generation
189$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
190
191# The $(feature_display) controls the default detection message
192# output. It's set if:
193# - detected features differes from stored features from
194#   last build (in $(FEATURE_DUMP_FILENAME) file)
195# - one of the $(FEATURE_DISPLAY) is not detected
196# - VF is enabled
197
198ifeq ($(feature_dump_changed),1)
199  $(shell rm -f $(FEATURE_DUMP_FILENAME))
200  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
201endif
202
203feature_display_check = $(eval $(feature_check_display_code))
204define feature_check_display_code
205  ifneq ($(feature-$(1)), 1)
206    feature_display := 1
207  endif
208endef
209
210$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
211
212ifeq ($(VF),1)
213  feature_display := 1
214  feature_verbose := 1
215endif
216
217ifeq ($(feature_display),1)
218  $(info )
219  $(info Auto-detecting system features:)
220  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
221  ifneq ($(feature_verbose),1)
222    $(info )
223  endif
224endif
225
226ifeq ($(feature_verbose),1)
227  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
228  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
229  $(info )
230endif
231