xref: /openbmc/linux/tools/build/Makefile.feature (revision 5f66f73b) 
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) CC="$(CC)" CXX="$(CXX)" 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        libbfd                          \
42        libbfd-buildid			\
43        libcap                          \
44        libelf                          \
45        libelf-getphdrnum               \
46        libelf-gelf_getnote             \
47        libelf-getshdrstrndx            \
48        libnuma                         \
49        numa_num_possible_cpus          \
50        libperl                         \
51        libpython                       \
52        libpython-version               \
53        libslang                        \
54        libslang-include-subdir         \
55        libcrypto                       \
56        libunwind                       \
57        pthread-attr-setaffinity-np     \
58        pthread-barrier     		\
59        reallocarray                    \
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        libaio				\
71        libzstd				\
72        disassembler-four-args		\
73        file-handle
74
75# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
76# of all feature tests
77FEATURE_TESTS_EXTRA :=                  \
78         bionic                         \
79         compile-32                     \
80         compile-x32                    \
81         cplus-demangle                 \
82         gtk2                           \
83         gtk2-infobar                   \
84         hello                          \
85         libbabeltrace                  \
86         libbfd-liberty                 \
87         libbfd-liberty-z               \
88         libopencsd                     \
89         libunwind-x86                  \
90         libunwind-x86_64               \
91         libunwind-arm                  \
92         libunwind-aarch64              \
93         libunwind-debug-frame          \
94         libunwind-debug-frame-arm      \
95         libunwind-debug-frame-aarch64  \
96         cxx                            \
97         llvm                           \
98         llvm-version                   \
99         clang                          \
100         libbpf                         \
101         libpfm4                        \
102         libdebuginfod			\
103         clang-bpf-co-re
104
105
106FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
107
108ifeq ($(FEATURE_TESTS),all)
109  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
110endif
111
112FEATURE_DISPLAY ?=              \
113         dwarf                  \
114         dwarf_getlocations     \
115         glibc                  \
116         libbfd                 \
117         libbfd-buildid		\
118         libcap                 \
119         libelf                 \
120         libnuma                \
121         numa_num_possible_cpus \
122         libperl                \
123         libpython              \
124         libcrypto              \
125         libunwind              \
126         libdw-dwarf-unwind     \
127         zlib                   \
128         lzma                   \
129         get_cpuid              \
130         bpf			\
131         libaio			\
132         libzstd		\
133         disassembler-four-args
134
135# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
136# If in the future we need per-feature checks/flags for features not
137# mentioned in this list we need to refactor this ;-).
138set_test_all_flags = $(eval $(set_test_all_flags_code))
139define set_test_all_flags_code
140  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
141  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
142endef
143
144$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
145
146#
147# Special fast-path for the 'all features are available' case:
148#
149$(call feature_check,all,$(MSG))
150
151#
152# Just in case the build freshly failed, make sure we print the
153# feature matrix:
154#
155ifeq ($(feature-all), 1)
156  #
157  # test-all.c passed - just set all the core feature flags to 1:
158  #
159  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
160  #
161  # test-all.c does not comprise these tests, so we need to
162  # for this case to get features proper values
163  #
164  $(call feature_check,compile-32)
165  $(call feature_check,compile-x32)
166  $(call feature_check,bionic)
167  $(call feature_check,libbabeltrace)
168else
169  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
170endif
171
172#
173# Print the result of the feature test:
174#
175feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
176
177define feature_print_status_code
178  ifeq ($(feature-$(1)), 1)
179    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
180  else
181    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
182  endif
183endef
184
185feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
186define feature_print_text_code
187    MSG = $(shell printf '...%30s: %s' $(1) $(2))
188endef
189
190#
191# generates feature value assignment for name, like:
192#   $(call feature_assign,dwarf) == feature-dwarf=1
193#
194feature_assign = feature-$(1)=$(feature-$(1))
195
196FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
197FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
198
199feature_dump_check = $(eval $(feature_dump_check_code))
200define feature_dump_check_code
201  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
202    $(2) := 1
203  endif
204endef
205
206#
207# First check if any test from FEATURE_DISPLAY
208# and set feature_display := 1 if it does
209$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
210
211#
212# Now also check if any other test changed,
213# so we force FEATURE-DUMP generation
214$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
215
216# The $(feature_display) controls the default detection message
217# output. It's set if:
218# - detected features differes from stored features from
219#   last build (in $(FEATURE_DUMP_FILENAME) file)
220# - one of the $(FEATURE_DISPLAY) is not detected
221# - VF is enabled
222
223ifeq ($(feature_dump_changed),1)
224  $(shell rm -f $(FEATURE_DUMP_FILENAME))
225  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
226endif
227
228feature_display_check = $(eval $(feature_check_display_code))
229define feature_check_display_code
230  ifneq ($(feature-$(1)), 1)
231    feature_display := 1
232  endif
233endef
234
235$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
236
237ifeq ($(VF),1)
238  feature_display := 1
239  feature_verbose := 1
240endif
241
242ifeq ($(feature_display),1)
243  $(info )
244  $(info Auto-detecting system features:)
245  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
246  ifneq ($(feature_verbose),1)
247    $(info )
248  endif
249endif
250
251ifeq ($(feature_verbose),1)
252  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
253  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
254  $(info )
255endif
256