xref: /openbmc/linux/tools/build/Makefile.feature (revision e657c18a) 
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        disassembler-four-args
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         libbfd-liberty                 \
82         libbfd-liberty-z               \
83         libopencsd                     \
84         libunwind-x86                  \
85         libunwind-x86_64               \
86         libunwind-arm                  \
87         libunwind-aarch64              \
88         libunwind-debug-frame          \
89         libunwind-debug-frame-arm      \
90         libunwind-debug-frame-aarch64  \
91         cxx                            \
92         llvm                           \
93         llvm-version                   \
94         clang
95
96FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
97
98ifeq ($(FEATURE_TESTS),all)
99  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
100endif
101
102FEATURE_DISPLAY ?=              \
103         dwarf                  \
104         dwarf_getlocations     \
105         glibc                  \
106         gtk2                   \
107         libaudit               \
108         libbfd                 \
109         libelf                 \
110         libnuma                \
111         numa_num_possible_cpus \
112         libperl                \
113         libpython              \
114         libslang               \
115         libcrypto              \
116         libunwind              \
117         libdw-dwarf-unwind     \
118         zlib                   \
119         lzma                   \
120         get_cpuid              \
121         bpf			\
122         libaio			\
123         disassembler-four-args
124
125# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
126# If in the future we need per-feature checks/flags for features not
127# mentioned in this list we need to refactor this ;-).
128set_test_all_flags = $(eval $(set_test_all_flags_code))
129define set_test_all_flags_code
130  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
131  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
132endef
133
134$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
135
136#
137# Special fast-path for the 'all features are available' case:
138#
139$(call feature_check,all,$(MSG))
140
141#
142# Just in case the build freshly failed, make sure we print the
143# feature matrix:
144#
145ifeq ($(feature-all), 1)
146  #
147  # test-all.c passed - just set all the core feature flags to 1:
148  #
149  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
150  #
151  # test-all.c does not comprise these tests, so we need to
152  # for this case to get features proper values
153  #
154  $(call feature_check,compile-32)
155  $(call feature_check,compile-x32)
156  $(call feature_check,bionic)
157  $(call feature_check,libbabeltrace)
158else
159  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
160endif
161
162#
163# Print the result of the feature test:
164#
165feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
166
167define feature_print_status_code
168  ifeq ($(feature-$(1)), 1)
169    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
170  else
171    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
172  endif
173endef
174
175feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
176define feature_print_text_code
177    MSG = $(shell printf '...%30s: %s' $(1) $(2))
178endef
179
180#
181# generates feature value assignment for name, like:
182#   $(call feature_assign,dwarf) == feature-dwarf=1
183#
184feature_assign = feature-$(1)=$(feature-$(1))
185
186FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
187FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
188
189feature_dump_check = $(eval $(feature_dump_check_code))
190define feature_dump_check_code
191  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
192    $(2) := 1
193  endif
194endef
195
196#
197# First check if any test from FEATURE_DISPLAY
198# and set feature_display := 1 if it does
199$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
200
201#
202# Now also check if any other test changed,
203# so we force FEATURE-DUMP generation
204$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
205
206# The $(feature_display) controls the default detection message
207# output. It's set if:
208# - detected features differes from stored features from
209#   last build (in $(FEATURE_DUMP_FILENAME) file)
210# - one of the $(FEATURE_DISPLAY) is not detected
211# - VF is enabled
212
213ifeq ($(feature_dump_changed),1)
214  $(shell rm -f $(FEATURE_DUMP_FILENAME))
215  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
216endif
217
218feature_display_check = $(eval $(feature_check_display_code))
219define feature_check_display_code
220  ifneq ($(feature-$(1)), 1)
221    feature_display := 1
222  endif
223endef
224
225$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
226
227ifeq ($(VF),1)
228  feature_display := 1
229  feature_verbose := 1
230endif
231
232ifeq ($(feature_display),1)
233  $(info )
234  $(info Auto-detecting system features:)
235  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
236  ifneq ($(feature_verbose),1)
237    $(info )
238  endif
239endif
240
241ifeq ($(feature_verbose),1)
242  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
243  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
244  $(info )
245endif
246