xref: /openbmc/linux/tools/build/Makefile.feature (revision 7587eb18) 
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-mmap			\
44	libnuma				\
45	numa_num_possible_cpus		\
46	libperl				\
47	libpython			\
48	libpython-version		\
49	libslang			\
50	libcrypto			\
51	libunwind			\
52	libunwind-x86			\
53	libunwind-x86_64		\
54	libunwind-arm			\
55	libunwind-aarch64		\
56	pthread-attr-setaffinity-np	\
57	stackprotector-all		\
58	timerfd				\
59	libdw-dwarf-unwind		\
60	zlib				\
61	lzma				\
62	get_cpuid			\
63	bpf
64
65# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
66# of all feature tests
67FEATURE_TESTS_EXTRA :=			\
68	bionic				\
69	compile-32			\
70	compile-x32			\
71	cplus-demangle			\
72	hello				\
73	libbabeltrace			\
74	liberty				\
75	liberty-z			\
76	libunwind-debug-frame		\
77	libunwind-debug-frame-arm	\
78	libunwind-debug-frame-aarch64
79
80FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
81
82ifeq ($(FEATURE_TESTS),all)
83  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
84endif
85
86FEATURE_DISPLAY ?=			\
87	dwarf				\
88	dwarf_getlocations		\
89	glibc				\
90	gtk2				\
91	libaudit			\
92	libbfd				\
93	libelf				\
94	libnuma				\
95	numa_num_possible_cpus		\
96	libperl				\
97	libpython			\
98	libslang			\
99	libcrypto			\
100	libunwind			\
101	libdw-dwarf-unwind		\
102	zlib				\
103	lzma				\
104	get_cpuid			\
105	bpf
106
107# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
108# If in the future we need per-feature checks/flags for features not
109# mentioned in this list we need to refactor this ;-).
110set_test_all_flags = $(eval $(set_test_all_flags_code))
111define set_test_all_flags_code
112  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
113  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
114endef
115
116$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
117
118#
119# Special fast-path for the 'all features are available' case:
120#
121$(call feature_check,all,$(MSG))
122
123#
124# Just in case the build freshly failed, make sure we print the
125# feature matrix:
126#
127ifeq ($(feature-all), 1)
128  #
129  # test-all.c passed - just set all the core feature flags to 1:
130  #
131  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
132  #
133  # test-all.c does not comprise these tests, so we need to
134  # for this case to get features proper values
135  #
136  $(call feature_check,compile-32)
137  $(call feature_check,compile-x32)
138  $(call feature_check,bionic)
139  $(call feature_check,libbabeltrace)
140else
141  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
142endif
143
144#
145# Print the result of the feature test:
146#
147feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
148
149define feature_print_status_code
150  ifeq ($(feature-$(1)), 1)
151    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
152  else
153    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
154  endif
155endef
156
157feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
158define feature_print_text_code
159    MSG = $(shell printf '...%30s: %s' $(1) $(2))
160endef
161
162#
163# generates feature value assignment for name, like:
164#   $(call feature_assign,dwarf) == feature-dwarf=1
165#
166feature_assign = feature-$(1)=$(feature-$(1))
167
168FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
169FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
170
171feature_dump_check = $(eval $(feature_dump_check_code))
172define feature_dump_check_code
173  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
174    $(2) := 1
175  endif
176endef
177
178#
179# First check if any test from FEATURE_DISPLAY
180# and set feature_display := 1 if it does
181$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
182
183#
184# Now also check if any other test changed,
185# so we force FEATURE-DUMP generation
186$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
187
188# The $(feature_display) controls the default detection message
189# output. It's set if:
190# - detected features differes from stored features from
191#   last build (in $(FEATURE_DUMP_FILENAME) file)
192# - one of the $(FEATURE_DISPLAY) is not detected
193# - VF is enabled
194
195ifeq ($(feature_dump_changed),1)
196  $(shell rm -f $(FEATURE_DUMP_FILENAME))
197  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
198endif
199
200feature_display_check = $(eval $(feature_check_display_code))
201define feature_check_display_code
202  ifneq ($(feature-$(1)), 1)
203    feature_display := 1
204  endif
205endef
206
207$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
208
209ifeq ($(VF),1)
210  feature_display := 1
211  feature_verbose := 1
212endif
213
214ifeq ($(feature_display),1)
215  $(info )
216  $(info Auto-detecting system features:)
217  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
218  ifneq ($(feature_verbose),1)
219    $(info )
220  endif
221endif
222
223ifeq ($(feature_verbose),1)
224  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
225  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
226  $(info )
227endif
228