xref: /openbmc/linux/tools/build/Makefile.feature (revision 56d06fa2) 
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	fortify-source			\
34	sync-compare-and-swap		\
35	glibc				\
36	gtk2				\
37	gtk2-infobar			\
38	libaudit			\
39	libbfd				\
40	libelf				\
41	libelf-getphdrnum		\
42	libelf-mmap			\
43	libnuma				\
44	numa_num_possible_cpus		\
45	libperl				\
46	libpython			\
47	libpython-version		\
48	libslang			\
49	libcrypto			\
50	libunwind			\
51	pthread-attr-setaffinity-np	\
52	stackprotector-all		\
53	timerfd				\
54	libdw-dwarf-unwind		\
55	zlib				\
56	lzma				\
57	get_cpuid			\
58	bpf
59
60# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
61# of all feature tests
62FEATURE_TESTS_EXTRA :=			\
63	bionic				\
64	compile-32			\
65	compile-x32			\
66	cplus-demangle			\
67	hello				\
68	libbabeltrace			\
69	liberty				\
70	liberty-z			\
71	libunwind-debug-frame
72
73FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
74
75ifeq ($(FEATURE_TESTS),all)
76  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
77endif
78
79FEATURE_DISPLAY ?=			\
80	dwarf				\
81	glibc				\
82	gtk2				\
83	libaudit			\
84	libbfd				\
85	libelf				\
86	libnuma				\
87	numa_num_possible_cpus		\
88	libperl				\
89	libpython			\
90	libslang			\
91	libcrypto			\
92	libunwind			\
93	libdw-dwarf-unwind		\
94	zlib				\
95	lzma				\
96	get_cpuid			\
97	bpf
98
99# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
100# If in the future we need per-feature checks/flags for features not
101# mentioned in this list we need to refactor this ;-).
102set_test_all_flags = $(eval $(set_test_all_flags_code))
103define set_test_all_flags_code
104  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
105  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
106endef
107
108$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
109
110#
111# Special fast-path for the 'all features are available' case:
112#
113$(call feature_check,all,$(MSG))
114
115#
116# Just in case the build freshly failed, make sure we print the
117# feature matrix:
118#
119ifeq ($(feature-all), 1)
120  #
121  # test-all.c passed - just set all the core feature flags to 1:
122  #
123  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
124  #
125  # test-all.c does not comprise these tests, so we need to
126  # for this case to get features proper values
127  #
128  $(call feature_check,compile-32)
129  $(call feature_check,compile-x32)
130  $(call feature_check,bionic)
131  $(call feature_check,libbabeltrace)
132else
133  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
134endif
135
136#
137# Print the result of the feature test:
138#
139feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
140
141define feature_print_status_code
142  ifeq ($(feature-$(1)), 1)
143    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
144  else
145    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
146  endif
147endef
148
149feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
150define feature_print_text_code
151    MSG = $(shell printf '...%30s: %s' $(1) $(2))
152endef
153
154#
155# generates feature value assignment for name, like:
156#   $(call feature_assign,dwarf) == feature-dwarf=1
157#
158feature_assign = feature-$(1)=$(feature-$(1))
159
160FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
161FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
162
163feature_dump_check = $(eval $(feature_dump_check_code))
164define feature_dump_check_code
165  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
166    $(2) := 1
167  endif
168endef
169
170#
171# First check if any test from FEATURE_DISPLAY
172# and set feature_display := 1 if it does
173$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
174
175#
176# Now also check if any other test changed,
177# so we force FEATURE-DUMP generation
178$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
179
180# The $(feature_display) controls the default detection message
181# output. It's set if:
182# - detected features differes from stored features from
183#   last build (in $(FEATURE_DUMP_FILENAME) file)
184# - one of the $(FEATURE_DISPLAY) is not detected
185# - VF is enabled
186
187ifeq ($(feature_dump_changed),1)
188  $(shell rm -f $(FEATURE_DUMP_FILENAME))
189  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
190endif
191
192feature_display_check = $(eval $(feature_check_display_code))
193define feature_check_display_code
194  ifneq ($(feature-$(1)), 1)
195    feature_display := 1
196  endif
197endef
198
199$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
200
201ifeq ($(VF),1)
202  feature_display := 1
203  feature_verbose := 1
204endif
205
206ifeq ($(feature_display),1)
207  $(info )
208  $(info Auto-detecting system features:)
209  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
210  ifneq ($(feature_verbose),1)
211    $(info )
212  endif
213endif
214
215ifeq ($(feature_verbose),1)
216  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
217  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
218  $(info )
219endif
220