xref: /openbmc/linux/tools/build/Makefile.feature (revision e2c75e76) 
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        libopencsd
71
72# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
73# of all feature tests
74FEATURE_TESTS_EXTRA :=                  \
75         bionic                         \
76         compile-32                     \
77         compile-x32                    \
78         cplus-demangle                 \
79         hello                          \
80         libbabeltrace                  \
81         liberty                        \
82         liberty-z                      \
83         libunwind-debug-frame          \
84         libunwind-debug-frame-arm      \
85         libunwind-debug-frame-aarch64
86
87FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
88
89ifeq ($(FEATURE_TESTS),all)
90  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
91endif
92
93FEATURE_DISPLAY ?=              \
94         dwarf                  \
95         dwarf_getlocations     \
96         glibc                  \
97         gtk2                   \
98         libaudit               \
99         libbfd                 \
100         libelf                 \
101         libnuma                \
102         numa_num_possible_cpus \
103         libperl                \
104         libpython              \
105         libslang               \
106         libcrypto              \
107         libunwind              \
108         libdw-dwarf-unwind     \
109         zlib                   \
110         lzma                   \
111         get_cpuid              \
112         bpf
113
114# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
115# If in the future we need per-feature checks/flags for features not
116# mentioned in this list we need to refactor this ;-).
117set_test_all_flags = $(eval $(set_test_all_flags_code))
118define set_test_all_flags_code
119  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
120  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
121endef
122
123$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
124
125#
126# Special fast-path for the 'all features are available' case:
127#
128$(call feature_check,all,$(MSG))
129
130#
131# Just in case the build freshly failed, make sure we print the
132# feature matrix:
133#
134ifeq ($(feature-all), 1)
135  #
136  # test-all.c passed - just set all the core feature flags to 1:
137  #
138  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
139  #
140  # test-all.c does not comprise these tests, so we need to
141  # for this case to get features proper values
142  #
143  $(call feature_check,compile-32)
144  $(call feature_check,compile-x32)
145  $(call feature_check,bionic)
146  $(call feature_check,libbabeltrace)
147else
148  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
149endif
150
151#
152# Print the result of the feature test:
153#
154feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
155
156define feature_print_status_code
157  ifeq ($(feature-$(1)), 1)
158    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
159  else
160    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
161  endif
162endef
163
164feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
165define feature_print_text_code
166    MSG = $(shell printf '...%30s: %s' $(1) $(2))
167endef
168
169#
170# generates feature value assignment for name, like:
171#   $(call feature_assign,dwarf) == feature-dwarf=1
172#
173feature_assign = feature-$(1)=$(feature-$(1))
174
175FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
176FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
177
178feature_dump_check = $(eval $(feature_dump_check_code))
179define feature_dump_check_code
180  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
181    $(2) := 1
182  endif
183endef
184
185#
186# First check if any test from FEATURE_DISPLAY
187# and set feature_display := 1 if it does
188$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
189
190#
191# Now also check if any other test changed,
192# so we force FEATURE-DUMP generation
193$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
194
195# The $(feature_display) controls the default detection message
196# output. It's set if:
197# - detected features differes from stored features from
198#   last build (in $(FEATURE_DUMP_FILENAME) file)
199# - one of the $(FEATURE_DISPLAY) is not detected
200# - VF is enabled
201
202ifeq ($(feature_dump_changed),1)
203  $(shell rm -f $(FEATURE_DUMP_FILENAME))
204  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
205endif
206
207feature_display_check = $(eval $(feature_check_display_code))
208define feature_check_display_code
209  ifneq ($(feature-$(1)), 1)
210    feature_display := 1
211  endif
212endef
213
214$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
215
216ifeq ($(VF),1)
217  feature_display := 1
218  feature_verbose := 1
219endif
220
221ifeq ($(feature_display),1)
222  $(info )
223  $(info Auto-detecting system features:)
224  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
225  ifneq ($(feature_verbose),1)
226    $(info )
227  endif
228endif
229
230ifeq ($(feature_verbose),1)
231  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
232  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
233  $(info )
234endif
235