xref: /openbmc/linux/tools/build/Makefile.feature (revision ebd09753) 
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        reallocarray                    \
61        stackprotector-all              \
62        timerfd                         \
63        libdw-dwarf-unwind              \
64        zlib                            \
65        lzma                            \
66        get_cpuid                       \
67        bpf                             \
68        sched_getcpu			\
69        sdt				\
70        setns				\
71        libopencsd
72
73# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
74# of all feature tests
75FEATURE_TESTS_EXTRA :=                  \
76         bionic                         \
77         compile-32                     \
78         compile-x32                    \
79         cplus-demangle                 \
80         hello                          \
81         libbabeltrace                  \
82         liberty                        \
83         liberty-z                      \
84         libunwind-debug-frame          \
85         libunwind-debug-frame-arm      \
86         libunwind-debug-frame-aarch64  \
87         cxx                            \
88         llvm                           \
89         llvm-version                   \
90         clang
91
92FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
93
94ifeq ($(FEATURE_TESTS),all)
95  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
96endif
97
98FEATURE_DISPLAY ?=              \
99         dwarf                  \
100         dwarf_getlocations     \
101         glibc                  \
102         gtk2                   \
103         libaudit               \
104         libbfd                 \
105         libelf                 \
106         libnuma                \
107         numa_num_possible_cpus \
108         libperl                \
109         libpython              \
110         libslang               \
111         libcrypto              \
112         libunwind              \
113         libdw-dwarf-unwind     \
114         zlib                   \
115         lzma                   \
116         get_cpuid              \
117         bpf
118
119# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
120# If in the future we need per-feature checks/flags for features not
121# mentioned in this list we need to refactor this ;-).
122set_test_all_flags = $(eval $(set_test_all_flags_code))
123define set_test_all_flags_code
124  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
125  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
126endef
127
128$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
129
130#
131# Special fast-path for the 'all features are available' case:
132#
133$(call feature_check,all,$(MSG))
134
135#
136# Just in case the build freshly failed, make sure we print the
137# feature matrix:
138#
139ifeq ($(feature-all), 1)
140  #
141  # test-all.c passed - just set all the core feature flags to 1:
142  #
143  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
144  #
145  # test-all.c does not comprise these tests, so we need to
146  # for this case to get features proper values
147  #
148  $(call feature_check,compile-32)
149  $(call feature_check,compile-x32)
150  $(call feature_check,bionic)
151  $(call feature_check,libbabeltrace)
152else
153  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
154endif
155
156#
157# Print the result of the feature test:
158#
159feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
160
161define feature_print_status_code
162  ifeq ($(feature-$(1)), 1)
163    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
164  else
165    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
166  endif
167endef
168
169feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
170define feature_print_text_code
171    MSG = $(shell printf '...%30s: %s' $(1) $(2))
172endef
173
174#
175# generates feature value assignment for name, like:
176#   $(call feature_assign,dwarf) == feature-dwarf=1
177#
178feature_assign = feature-$(1)=$(feature-$(1))
179
180FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
181FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
182
183feature_dump_check = $(eval $(feature_dump_check_code))
184define feature_dump_check_code
185  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
186    $(2) := 1
187  endif
188endef
189
190#
191# First check if any test from FEATURE_DISPLAY
192# and set feature_display := 1 if it does
193$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
194
195#
196# Now also check if any other test changed,
197# so we force FEATURE-DUMP generation
198$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
199
200# The $(feature_display) controls the default detection message
201# output. It's set if:
202# - detected features differes from stored features from
203#   last build (in $(FEATURE_DUMP_FILENAME) file)
204# - one of the $(FEATURE_DISPLAY) is not detected
205# - VF is enabled
206
207ifeq ($(feature_dump_changed),1)
208  $(shell rm -f $(FEATURE_DUMP_FILENAME))
209  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
210endif
211
212feature_display_check = $(eval $(feature_check_display_code))
213define feature_check_display_code
214  ifneq ($(feature-$(1)), 1)
215    feature_display := 1
216  endif
217endef
218
219$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
220
221ifeq ($(VF),1)
222  feature_display := 1
223  feature_verbose := 1
224endif
225
226ifeq ($(feature_display),1)
227  $(info )
228  $(info Auto-detecting system features:)
229  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
230  ifneq ($(feature_verbose),1)
231    $(info )
232  endif
233endif
234
235ifeq ($(feature_verbose),1)
236  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
237  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
238  $(info )
239endif
240