xref: /openbmc/linux/tools/build/Makefile.feature (revision a72594ca) 
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))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(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        pthread-barrier     		\
60        stackprotector-all              \
61        timerfd                         \
62        libdw-dwarf-unwind              \
63        zlib                            \
64        lzma                            \
65        get_cpuid                       \
66        bpf                             \
67        sched_getcpu			\
68        sdt				\
69        setns
70
71# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
72# of all feature tests
73FEATURE_TESTS_EXTRA :=                  \
74         bionic                         \
75         compile-32                     \
76         compile-x32                    \
77         cplus-demangle                 \
78         hello                          \
79         libbabeltrace                  \
80         liberty                        \
81         liberty-z                      \
82         libunwind-debug-frame          \
83         libunwind-debug-frame-arm      \
84         libunwind-debug-frame-aarch64
85
86FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
87
88ifeq ($(FEATURE_TESTS),all)
89  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
90endif
91
92FEATURE_DISPLAY ?=              \
93         dwarf                  \
94         dwarf_getlocations     \
95         glibc                  \
96         gtk2                   \
97         libaudit               \
98         libbfd                 \
99         libelf                 \
100         libnuma                \
101         numa_num_possible_cpus \
102         libperl                \
103         libpython              \
104         libslang               \
105         libcrypto              \
106         libunwind              \
107         libdw-dwarf-unwind     \
108         zlib                   \
109         lzma                   \
110         get_cpuid              \
111         bpf
112
113# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
114# If in the future we need per-feature checks/flags for features not
115# mentioned in this list we need to refactor this ;-).
116set_test_all_flags = $(eval $(set_test_all_flags_code))
117define set_test_all_flags_code
118  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
119  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
120endef
121
122$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
123
124#
125# Special fast-path for the 'all features are available' case:
126#
127$(call feature_check,all,$(MSG))
128
129#
130# Just in case the build freshly failed, make sure we print the
131# feature matrix:
132#
133ifeq ($(feature-all), 1)
134  #
135  # test-all.c passed - just set all the core feature flags to 1:
136  #
137  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
138  #
139  # test-all.c does not comprise these tests, so we need to
140  # for this case to get features proper values
141  #
142  $(call feature_check,compile-32)
143  $(call feature_check,compile-x32)
144  $(call feature_check,bionic)
145  $(call feature_check,libbabeltrace)
146else
147  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
148endif
149
150#
151# Print the result of the feature test:
152#
153feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
154
155define feature_print_status_code
156  ifeq ($(feature-$(1)), 1)
157    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
158  else
159    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
160  endif
161endef
162
163feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
164define feature_print_text_code
165    MSG = $(shell printf '...%30s: %s' $(1) $(2))
166endef
167
168#
169# generates feature value assignment for name, like:
170#   $(call feature_assign,dwarf) == feature-dwarf=1
171#
172feature_assign = feature-$(1)=$(feature-$(1))
173
174FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
175FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
176
177feature_dump_check = $(eval $(feature_dump_check_code))
178define feature_dump_check_code
179  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
180    $(2) := 1
181  endif
182endef
183
184#
185# First check if any test from FEATURE_DISPLAY
186# and set feature_display := 1 if it does
187$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
188
189#
190# Now also check if any other test changed,
191# so we force FEATURE-DUMP generation
192$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
193
194# The $(feature_display) controls the default detection message
195# output. It's set if:
196# - detected features differes from stored features from
197#   last build (in $(FEATURE_DUMP_FILENAME) file)
198# - one of the $(FEATURE_DISPLAY) is not detected
199# - VF is enabled
200
201ifeq ($(feature_dump_changed),1)
202  $(shell rm -f $(FEATURE_DUMP_FILENAME))
203  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
204endif
205
206feature_display_check = $(eval $(feature_check_display_code))
207define feature_check_display_code
208  ifneq ($(feature-$(1)), 1)
209    feature_display := 1
210  endif
211endef
212
213$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
214
215ifeq ($(VF),1)
216  feature_display := 1
217  feature_verbose := 1
218endif
219
220ifeq ($(feature_display),1)
221  $(info )
222  $(info Auto-detecting system features:)
223  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
224  ifneq ($(feature_verbose),1)
225    $(info )
226  endif
227endif
228
229ifeq ($(feature_verbose),1)
230  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
231  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
232  $(info )
233endif
234