xref: /openbmc/linux/tools/build/Makefile.feature (revision bb970707) 
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-getshdrstrndx		\
44	libelf-mmap			\
45	libnuma				\
46	numa_num_possible_cpus		\
47	libperl				\
48	libpython			\
49	libpython-version		\
50	libslang			\
51	libcrypto			\
52	libunwind			\
53	libunwind-x86			\
54	libunwind-x86_64		\
55	libunwind-arm			\
56	libunwind-aarch64		\
57	pthread-attr-setaffinity-np	\
58	stackprotector-all		\
59	timerfd				\
60	libdw-dwarf-unwind		\
61	zlib				\
62	lzma				\
63	get_cpuid			\
64	bpf
65
66# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
67# of all feature tests
68FEATURE_TESTS_EXTRA :=			\
69	bionic				\
70	compile-32			\
71	compile-x32			\
72	cplus-demangle			\
73	hello				\
74	libbabeltrace			\
75	liberty				\
76	liberty-z			\
77	libunwind-debug-frame		\
78	libunwind-debug-frame-arm	\
79	libunwind-debug-frame-aarch64
80
81FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
82
83ifeq ($(FEATURE_TESTS),all)
84  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
85endif
86
87FEATURE_DISPLAY ?=			\
88	dwarf				\
89	dwarf_getlocations		\
90	glibc				\
91	gtk2				\
92	libaudit			\
93	libbfd				\
94	libelf				\
95	libnuma				\
96	numa_num_possible_cpus		\
97	libperl				\
98	libpython			\
99	libslang			\
100	libcrypto			\
101	libunwind			\
102	libdw-dwarf-unwind		\
103	zlib				\
104	lzma				\
105	get_cpuid			\
106	bpf
107
108# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
109# If in the future we need per-feature checks/flags for features not
110# mentioned in this list we need to refactor this ;-).
111set_test_all_flags = $(eval $(set_test_all_flags_code))
112define set_test_all_flags_code
113  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
114  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
115endef
116
117$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
118
119#
120# Special fast-path for the 'all features are available' case:
121#
122$(call feature_check,all,$(MSG))
123
124#
125# Just in case the build freshly failed, make sure we print the
126# feature matrix:
127#
128ifeq ($(feature-all), 1)
129  #
130  # test-all.c passed - just set all the core feature flags to 1:
131  #
132  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
133  #
134  # test-all.c does not comprise these tests, so we need to
135  # for this case to get features proper values
136  #
137  $(call feature_check,compile-32)
138  $(call feature_check,compile-x32)
139  $(call feature_check,bionic)
140  $(call feature_check,libbabeltrace)
141else
142  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
143endif
144
145#
146# Print the result of the feature test:
147#
148feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
149
150define feature_print_status_code
151  ifeq ($(feature-$(1)), 1)
152    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
153  else
154    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
155  endif
156endef
157
158feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
159define feature_print_text_code
160    MSG = $(shell printf '...%30s: %s' $(1) $(2))
161endef
162
163#
164# generates feature value assignment for name, like:
165#   $(call feature_assign,dwarf) == feature-dwarf=1
166#
167feature_assign = feature-$(1)=$(feature-$(1))
168
169FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
170FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
171
172feature_dump_check = $(eval $(feature_dump_check_code))
173define feature_dump_check_code
174  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
175    $(2) := 1
176  endif
177endef
178
179#
180# First check if any test from FEATURE_DISPLAY
181# and set feature_display := 1 if it does
182$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
183
184#
185# Now also check if any other test changed,
186# so we force FEATURE-DUMP generation
187$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
188
189# The $(feature_display) controls the default detection message
190# output. It's set if:
191# - detected features differes from stored features from
192#   last build (in $(FEATURE_DUMP_FILENAME) file)
193# - one of the $(FEATURE_DISPLAY) is not detected
194# - VF is enabled
195
196ifeq ($(feature_dump_changed),1)
197  $(shell rm -f $(FEATURE_DUMP_FILENAME))
198  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
199endif
200
201feature_display_check = $(eval $(feature_check_display_code))
202define feature_check_display_code
203  ifneq ($(feature-$(1)), 1)
204    feature_display := 1
205  endif
206endef
207
208$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
209
210ifeq ($(VF),1)
211  feature_display := 1
212  feature_verbose := 1
213endif
214
215ifeq ($(feature_display),1)
216  $(info )
217  $(info Auto-detecting system features:)
218  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
219  ifneq ($(feature_verbose),1)
220    $(info )
221  endif
222endif
223
224ifeq ($(feature_verbose),1)
225  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
226  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
227  $(info )
228endif
229