xref: /openbmc/linux/tools/build/Makefile.feature (revision ccb01374) 
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        eventfd                         \
35        fortify-source                  \
36        sync-compare-and-swap           \
37        get_current_dir_name            \
38        glibc                           \
39        gtk2                            \
40        gtk2-infobar                    \
41        libaudit                        \
42        libbfd                          \
43        libelf                          \
44        libelf-getphdrnum               \
45        libelf-gelf_getnote             \
46        libelf-getshdrstrndx            \
47        libelf-mmap                     \
48        libnuma                         \
49        numa_num_possible_cpus          \
50        libperl                         \
51        libpython                       \
52        libpython-version               \
53        libslang                        \
54        libcrypto                       \
55        libunwind                       \
56        libunwind-x86                   \
57        libunwind-x86_64                \
58        libunwind-arm                   \
59        libunwind-aarch64               \
60        pthread-attr-setaffinity-np     \
61        pthread-barrier     		\
62        reallocarray                    \
63        stackprotector-all              \
64        timerfd                         \
65        libdw-dwarf-unwind              \
66        zlib                            \
67        lzma                            \
68        get_cpuid                       \
69        bpf                             \
70        sched_getcpu			\
71        sdt				\
72        setns				\
73        libopencsd			\
74        libaio
75
76# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
77# of all feature tests
78FEATURE_TESTS_EXTRA :=                  \
79         bionic                         \
80         compile-32                     \
81         compile-x32                    \
82         cplus-demangle                 \
83         hello                          \
84         libbabeltrace                  \
85         libbfd-liberty                 \
86         libbfd-liberty-z               \
87         libunwind-debug-frame          \
88         libunwind-debug-frame-arm      \
89         libunwind-debug-frame-aarch64  \
90         cxx                            \
91         llvm                           \
92         llvm-version                   \
93         clang
94
95FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
96
97ifeq ($(FEATURE_TESTS),all)
98  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
99endif
100
101FEATURE_DISPLAY ?=              \
102         dwarf                  \
103         dwarf_getlocations     \
104         glibc                  \
105         gtk2                   \
106         libaudit               \
107         libbfd                 \
108         libelf                 \
109         libnuma                \
110         numa_num_possible_cpus \
111         libperl                \
112         libpython              \
113         libslang               \
114         libcrypto              \
115         libunwind              \
116         libdw-dwarf-unwind     \
117         zlib                   \
118         lzma                   \
119         get_cpuid              \
120         bpf			\
121         libaio
122
123# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
124# If in the future we need per-feature checks/flags for features not
125# mentioned in this list we need to refactor this ;-).
126set_test_all_flags = $(eval $(set_test_all_flags_code))
127define set_test_all_flags_code
128  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
129  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
130endef
131
132$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
133
134#
135# Special fast-path for the 'all features are available' case:
136#
137$(call feature_check,all,$(MSG))
138
139#
140# Just in case the build freshly failed, make sure we print the
141# feature matrix:
142#
143ifeq ($(feature-all), 1)
144  #
145  # test-all.c passed - just set all the core feature flags to 1:
146  #
147  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
148  #
149  # test-all.c does not comprise these tests, so we need to
150  # for this case to get features proper values
151  #
152  $(call feature_check,compile-32)
153  $(call feature_check,compile-x32)
154  $(call feature_check,bionic)
155  $(call feature_check,libbabeltrace)
156else
157  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
158endif
159
160#
161# Print the result of the feature test:
162#
163feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
164
165define feature_print_status_code
166  ifeq ($(feature-$(1)), 1)
167    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
168  else
169    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
170  endif
171endef
172
173feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
174define feature_print_text_code
175    MSG = $(shell printf '...%30s: %s' $(1) $(2))
176endef
177
178#
179# generates feature value assignment for name, like:
180#   $(call feature_assign,dwarf) == feature-dwarf=1
181#
182feature_assign = feature-$(1)=$(feature-$(1))
183
184FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
185FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
186
187feature_dump_check = $(eval $(feature_dump_check_code))
188define feature_dump_check_code
189  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
190    $(2) := 1
191  endif
192endef
193
194#
195# First check if any test from FEATURE_DISPLAY
196# and set feature_display := 1 if it does
197$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
198
199#
200# Now also check if any other test changed,
201# so we force FEATURE-DUMP generation
202$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
203
204# The $(feature_display) controls the default detection message
205# output. It's set if:
206# - detected features differes from stored features from
207#   last build (in $(FEATURE_DUMP_FILENAME) file)
208# - one of the $(FEATURE_DISPLAY) is not detected
209# - VF is enabled
210
211ifeq ($(feature_dump_changed),1)
212  $(shell rm -f $(FEATURE_DUMP_FILENAME))
213  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
214endif
215
216feature_display_check = $(eval $(feature_check_display_code))
217define feature_check_display_code
218  ifneq ($(feature-$(1)), 1)
219    feature_display := 1
220  endif
221endef
222
223$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
224
225ifeq ($(VF),1)
226  feature_display := 1
227  feature_verbose := 1
228endif
229
230ifeq ($(feature_display),1)
231  $(info )
232  $(info Auto-detecting system features:)
233  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
234  ifneq ($(feature_verbose),1)
235    $(info )
236  endif
237endif
238
239ifeq ($(feature_verbose),1)
240  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
241  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
242  $(info )
243endif
244