xref: /openbmc/linux/tools/build/Makefile.feature (revision 74a22e8f) 
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        pthread-attr-setaffinity-np     \
57        pthread-barrier     		\
58        reallocarray                    \
59        stackprotector-all              \
60        timerfd                         \
61        libdw-dwarf-unwind              \
62        zlib                            \
63        lzma                            \
64        get_cpuid                       \
65        bpf                             \
66        sched_getcpu			\
67        sdt				\
68        setns				\
69        libaio				\
70        libzstd				\
71        disassembler-four-args
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         libbfd-liberty                 \
83         libbfd-liberty-z               \
84         libopencsd                     \
85         libunwind-x86                  \
86         libunwind-x86_64               \
87         libunwind-arm                  \
88         libunwind-aarch64              \
89         libunwind-debug-frame          \
90         libunwind-debug-frame-arm      \
91         libunwind-debug-frame-aarch64  \
92         cxx                            \
93         llvm                           \
94         llvm-version                   \
95         clang
96
97FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
98
99ifeq ($(FEATURE_TESTS),all)
100  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
101endif
102
103FEATURE_DISPLAY ?=              \
104         dwarf                  \
105         dwarf_getlocations     \
106         glibc                  \
107         gtk2                   \
108         libaudit               \
109         libbfd                 \
110         libelf                 \
111         libnuma                \
112         numa_num_possible_cpus \
113         libperl                \
114         libpython              \
115         libslang               \
116         libcrypto              \
117         libunwind              \
118         libdw-dwarf-unwind     \
119         zlib                   \
120         lzma                   \
121         get_cpuid              \
122         bpf			\
123         libaio			\
124         libzstd		\
125         disassembler-four-args
126
127# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
128# If in the future we need per-feature checks/flags for features not
129# mentioned in this list we need to refactor this ;-).
130set_test_all_flags = $(eval $(set_test_all_flags_code))
131define set_test_all_flags_code
132  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
133  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
134endef
135
136$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
137
138#
139# Special fast-path for the 'all features are available' case:
140#
141$(call feature_check,all,$(MSG))
142
143#
144# Just in case the build freshly failed, make sure we print the
145# feature matrix:
146#
147ifeq ($(feature-all), 1)
148  #
149  # test-all.c passed - just set all the core feature flags to 1:
150  #
151  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
152  #
153  # test-all.c does not comprise these tests, so we need to
154  # for this case to get features proper values
155  #
156  $(call feature_check,compile-32)
157  $(call feature_check,compile-x32)
158  $(call feature_check,bionic)
159  $(call feature_check,libbabeltrace)
160else
161  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
162endif
163
164#
165# Print the result of the feature test:
166#
167feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
168
169define feature_print_status_code
170  ifeq ($(feature-$(1)), 1)
171    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
172  else
173    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
174  endif
175endef
176
177feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
178define feature_print_text_code
179    MSG = $(shell printf '...%30s: %s' $(1) $(2))
180endef
181
182#
183# generates feature value assignment for name, like:
184#   $(call feature_assign,dwarf) == feature-dwarf=1
185#
186feature_assign = feature-$(1)=$(feature-$(1))
187
188FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
189FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
190
191feature_dump_check = $(eval $(feature_dump_check_code))
192define feature_dump_check_code
193  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
194    $(2) := 1
195  endif
196endef
197
198#
199# First check if any test from FEATURE_DISPLAY
200# and set feature_display := 1 if it does
201$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
202
203#
204# Now also check if any other test changed,
205# so we force FEATURE-DUMP generation
206$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
207
208# The $(feature_display) controls the default detection message
209# output. It's set if:
210# - detected features differes from stored features from
211#   last build (in $(FEATURE_DUMP_FILENAME) file)
212# - one of the $(FEATURE_DISPLAY) is not detected
213# - VF is enabled
214
215ifeq ($(feature_dump_changed),1)
216  $(shell rm -f $(FEATURE_DUMP_FILENAME))
217  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
218endif
219
220feature_display_check = $(eval $(feature_check_display_code))
221define feature_check_display_code
222  ifneq ($(feature-$(1)), 1)
223    feature_display := 1
224  endif
225endef
226
227$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
228
229ifeq ($(VF),1)
230  feature_display := 1
231  feature_verbose := 1
232endif
233
234ifeq ($(feature_display),1)
235  $(info )
236  $(info Auto-detecting system features:)
237  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
238  ifneq ($(feature_verbose),1)
239    $(info )
240  endif
241endif
242
243ifeq ($(feature_verbose),1)
244  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
245  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
246  $(info )
247endif
248