xref: /openbmc/linux/tools/build/Makefile.feature (revision d003c346bf75f01d240c80000baf2fbf28e53782) 
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        get_current_dir_name            \
37        glibc                           \
38        gtk2                            \
39        gtk2-infobar                    \
40        libaudit                        \
41        libbfd                          \
42        libelf                          \
43        libelf-getphdrnum               \
44        libelf-gelf_getnote             \
45        libelf-getshdrstrndx            \
46        libelf-mmap                     \
47        libnuma                         \
48        numa_num_possible_cpus          \
49        libperl                         \
50        libpython                       \
51        libpython-version               \
52        libslang                        \
53        libcrypto                       \
54        libunwind                       \
55        libunwind-x86                   \
56        libunwind-x86_64                \
57        libunwind-arm                   \
58        libunwind-aarch64               \
59        pthread-attr-setaffinity-np     \
60        pthread-barrier     		\
61        reallocarray                    \
62        stackprotector-all              \
63        timerfd                         \
64        libdw-dwarf-unwind              \
65        zlib                            \
66        lzma                            \
67        get_cpuid                       \
68        bpf                             \
69        sched_getcpu			\
70        sdt				\
71        setns				\
72        libopencsd
73
74# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
75# of all feature tests
76FEATURE_TESTS_EXTRA :=                  \
77         bionic                         \
78         compile-32                     \
79         compile-x32                    \
80         cplus-demangle                 \
81         hello                          \
82         libbabeltrace                  \
83         liberty                        \
84         liberty-z                      \
85         libunwind-debug-frame          \
86         libunwind-debug-frame-arm      \
87         libunwind-debug-frame-aarch64  \
88         cxx                            \
89         llvm                           \
90         llvm-version                   \
91         clang
92
93FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
94
95ifeq ($(FEATURE_TESTS),all)
96  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
97endif
98
99FEATURE_DISPLAY ?=              \
100         dwarf                  \
101         dwarf_getlocations     \
102         glibc                  \
103         gtk2                   \
104         libaudit               \
105         libbfd                 \
106         libelf                 \
107         libnuma                \
108         numa_num_possible_cpus \
109         libperl                \
110         libpython              \
111         libslang               \
112         libcrypto              \
113         libunwind              \
114         libdw-dwarf-unwind     \
115         zlib                   \
116         lzma                   \
117         get_cpuid              \
118         bpf
119
120# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
121# If in the future we need per-feature checks/flags for features not
122# mentioned in this list we need to refactor this ;-).
123set_test_all_flags = $(eval $(set_test_all_flags_code))
124define set_test_all_flags_code
125  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
126  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
127endef
128
129$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
130
131#
132# Special fast-path for the 'all features are available' case:
133#
134$(call feature_check,all,$(MSG))
135
136#
137# Just in case the build freshly failed, make sure we print the
138# feature matrix:
139#
140ifeq ($(feature-all), 1)
141  #
142  # test-all.c passed - just set all the core feature flags to 1:
143  #
144  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
145  #
146  # test-all.c does not comprise these tests, so we need to
147  # for this case to get features proper values
148  #
149  $(call feature_check,compile-32)
150  $(call feature_check,compile-x32)
151  $(call feature_check,bionic)
152  $(call feature_check,libbabeltrace)
153else
154  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
155endif
156
157#
158# Print the result of the feature test:
159#
160feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
161
162define feature_print_status_code
163  ifeq ($(feature-$(1)), 1)
164    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
165  else
166    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
167  endif
168endef
169
170feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
171define feature_print_text_code
172    MSG = $(shell printf '...%30s: %s' $(1) $(2))
173endef
174
175#
176# generates feature value assignment for name, like:
177#   $(call feature_assign,dwarf) == feature-dwarf=1
178#
179feature_assign = feature-$(1)=$(feature-$(1))
180
181FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
182FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
183
184feature_dump_check = $(eval $(feature_dump_check_code))
185define feature_dump_check_code
186  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
187    $(2) := 1
188  endif
189endef
190
191#
192# First check if any test from FEATURE_DISPLAY
193# and set feature_display := 1 if it does
194$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
195
196#
197# Now also check if any other test changed,
198# so we force FEATURE-DUMP generation
199$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
200
201# The $(feature_display) controls the default detection message
202# output. It's set if:
203# - detected features differes from stored features from
204#   last build (in $(FEATURE_DUMP_FILENAME) file)
205# - one of the $(FEATURE_DISPLAY) is not detected
206# - VF is enabled
207
208ifeq ($(feature_dump_changed),1)
209  $(shell rm -f $(FEATURE_DUMP_FILENAME))
210  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
211endif
212
213feature_display_check = $(eval $(feature_check_display_code))
214define feature_check_display_code
215  ifneq ($(feature-$(1)), 1)
216    feature_display := 1
217  endif
218endef
219
220$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
221
222ifeq ($(VF),1)
223  feature_display := 1
224  feature_verbose := 1
225endif
226
227ifeq ($(feature_display),1)
228  $(info )
229  $(info Auto-detecting system features:)
230  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
231  ifneq ($(feature_verbose),1)
232    $(info )
233  endif
234endif
235
236ifeq ($(feature_verbose),1)
237  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
238  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
239  $(info )
240endif
241