xref: /openbmc/linux/tools/build/Makefile.feature (revision 022dacdd) 
1# SPDX-License-Identifier: GPL-2.0-only
2feature_dir := $(srctree)/tools/build/feature
3
4ifneq ($(OUTPUT),)
5  OUTPUT_FEATURES = $(OUTPUT)feature/
6  $(shell mkdir -p $(OUTPUT_FEATURES))
7endif
8
9feature_check = $(eval $(feature_check_code))
10define feature_check_code
11  feature-$(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)
12endef
13
14feature_set = $(eval $(feature_set_code))
15define feature_set_code
16  feature-$(1) := 1
17endef
18
19#
20# Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
21#
22
23#
24# Note that this is not a complete list of all feature tests, just
25# those that are typically built on a fully configured system.
26#
27# [ Feature tests not mentioned here have to be built explicitly in
28#   the rule that uses them - an example for that is the 'bionic'
29#   feature check. ]
30#
31FEATURE_TESTS_BASIC :=                  \
32        backtrace                       \
33        dwarf                           \
34        dwarf_getlocations              \
35        eventfd                         \
36        fortify-source                  \
37        sync-compare-and-swap           \
38        get_current_dir_name            \
39        gettid				\
40        glibc                           \
41        gtk2                            \
42        gtk2-infobar                    \
43        libaudit                        \
44        libbfd                          \
45        libcap                          \
46        libelf                          \
47        libelf-getphdrnum               \
48        libelf-gelf_getnote             \
49        libelf-getshdrstrndx            \
50        libelf-mmap                     \
51        libnuma                         \
52        numa_num_possible_cpus          \
53        libperl                         \
54        libpython                       \
55        libpython-version               \
56        libslang                        \
57        libslang-include-subdir         \
58        libcrypto                       \
59        libunwind                       \
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        libaio				\
74        libzstd				\
75        disassembler-four-args		\
76        file-handle
77
78# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
79# of all feature tests
80FEATURE_TESTS_EXTRA :=                  \
81         bionic                         \
82         compile-32                     \
83         compile-x32                    \
84         cplus-demangle                 \
85         hello                          \
86         libbabeltrace                  \
87         libbfd-liberty                 \
88         libbfd-liberty-z               \
89         libopencsd                     \
90         libunwind-x86                  \
91         libunwind-x86_64               \
92         libunwind-arm                  \
93         libunwind-aarch64              \
94         libunwind-debug-frame          \
95         libunwind-debug-frame-arm      \
96         libunwind-debug-frame-aarch64  \
97         cxx                            \
98         llvm                           \
99         llvm-version                   \
100         clang                          \
101         libbpf
102
103FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
104
105ifeq ($(FEATURE_TESTS),all)
106  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
107endif
108
109FEATURE_DISPLAY ?=              \
110         dwarf                  \
111         dwarf_getlocations     \
112         glibc                  \
113         gtk2                   \
114         libaudit               \
115         libbfd                 \
116         libcap                 \
117         libelf                 \
118         libnuma                \
119         numa_num_possible_cpus \
120         libperl                \
121         libpython              \
122         libcrypto              \
123         libunwind              \
124         libdw-dwarf-unwind     \
125         zlib                   \
126         lzma                   \
127         get_cpuid              \
128         bpf			\
129         libaio			\
130         libzstd		\
131         disassembler-four-args
132
133# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
134# If in the future we need per-feature checks/flags for features not
135# mentioned in this list we need to refactor this ;-).
136set_test_all_flags = $(eval $(set_test_all_flags_code))
137define set_test_all_flags_code
138  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
139  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
140endef
141
142$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
143
144#
145# Special fast-path for the 'all features are available' case:
146#
147$(call feature_check,all,$(MSG))
148
149#
150# Just in case the build freshly failed, make sure we print the
151# feature matrix:
152#
153ifeq ($(feature-all), 1)
154  #
155  # test-all.c passed - just set all the core feature flags to 1:
156  #
157  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
158  #
159  # test-all.c does not comprise these tests, so we need to
160  # for this case to get features proper values
161  #
162  $(call feature_check,compile-32)
163  $(call feature_check,compile-x32)
164  $(call feature_check,bionic)
165  $(call feature_check,libbabeltrace)
166else
167  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
168endif
169
170#
171# Print the result of the feature test:
172#
173feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
174
175define feature_print_status_code
176  ifeq ($(feature-$(1)), 1)
177    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
178  else
179    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
180  endif
181endef
182
183feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
184define feature_print_text_code
185    MSG = $(shell printf '...%30s: %s' $(1) $(2))
186endef
187
188#
189# generates feature value assignment for name, like:
190#   $(call feature_assign,dwarf) == feature-dwarf=1
191#
192feature_assign = feature-$(1)=$(feature-$(1))
193
194FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
195FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
196
197feature_dump_check = $(eval $(feature_dump_check_code))
198define feature_dump_check_code
199  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
200    $(2) := 1
201  endif
202endef
203
204#
205# First check if any test from FEATURE_DISPLAY
206# and set feature_display := 1 if it does
207$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
208
209#
210# Now also check if any other test changed,
211# so we force FEATURE-DUMP generation
212$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
213
214# The $(feature_display) controls the default detection message
215# output. It's set if:
216# - detected features differes from stored features from
217#   last build (in $(FEATURE_DUMP_FILENAME) file)
218# - one of the $(FEATURE_DISPLAY) is not detected
219# - VF is enabled
220
221ifeq ($(feature_dump_changed),1)
222  $(shell rm -f $(FEATURE_DUMP_FILENAME))
223  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
224endif
225
226feature_display_check = $(eval $(feature_check_display_code))
227define feature_check_display_code
228  ifneq ($(feature-$(1)), 1)
229    feature_display := 1
230  endif
231endef
232
233$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
234
235ifeq ($(VF),1)
236  feature_display := 1
237  feature_verbose := 1
238endif
239
240ifeq ($(feature_display),1)
241  $(info )
242  $(info Auto-detecting system features:)
243  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
244  ifneq ($(feature_verbose),1)
245    $(info )
246  endif
247endif
248
249ifeq ($(feature_verbose),1)
250  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
251  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
252  $(info )
253endif
254