xref: /openbmc/linux/tools/build/Makefile.feature (revision 23966841) 
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        libelf                          \
46        libelf-getphdrnum               \
47        libelf-gelf_getnote             \
48        libelf-getshdrstrndx            \
49        libelf-mmap                     \
50        libnuma                         \
51        numa_num_possible_cpus          \
52        libperl                         \
53        libpython                       \
54        libpython-version               \
55        libslang                        \
56        libslang-include-subdir         \
57        libcrypto                       \
58        libunwind                       \
59        pthread-attr-setaffinity-np     \
60        pthread-barrier     		\
61        reallocarray                    \
62        stackprotector-all              \
63        timerfd                         \
64        libdw-dwarf-unwind              \
65        zlib                            \
66        lzma                            \
67        get_cpuid                       \
68        bpf                             \
69        sched_getcpu			\
70        sdt				\
71        setns				\
72        libaio				\
73        libzstd				\
74        disassembler-four-args
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         libopencsd                     \
88         libunwind-x86                  \
89         libunwind-x86_64               \
90         libunwind-arm                  \
91         libunwind-aarch64              \
92         libunwind-debug-frame          \
93         libunwind-debug-frame-arm      \
94         libunwind-debug-frame-aarch64  \
95         cxx                            \
96         llvm                           \
97         llvm-version                   \
98         clang
99
100FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
101
102ifeq ($(FEATURE_TESTS),all)
103  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
104endif
105
106FEATURE_DISPLAY ?=              \
107         dwarf                  \
108         dwarf_getlocations     \
109         glibc                  \
110         gtk2                   \
111         libaudit               \
112         libbfd                 \
113         libelf                 \
114         libnuma                \
115         numa_num_possible_cpus \
116         libperl                \
117         libpython              \
118         libcrypto              \
119         libunwind              \
120         libdw-dwarf-unwind     \
121         zlib                   \
122         lzma                   \
123         get_cpuid              \
124         bpf			\
125         libaio			\
126         libzstd		\
127         disassembler-four-args
128
129# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
130# If in the future we need per-feature checks/flags for features not
131# mentioned in this list we need to refactor this ;-).
132set_test_all_flags = $(eval $(set_test_all_flags_code))
133define set_test_all_flags_code
134  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
135  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
136endef
137
138$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
139
140#
141# Special fast-path for the 'all features are available' case:
142#
143$(call feature_check,all,$(MSG))
144
145#
146# Just in case the build freshly failed, make sure we print the
147# feature matrix:
148#
149ifeq ($(feature-all), 1)
150  #
151  # test-all.c passed - just set all the core feature flags to 1:
152  #
153  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
154  #
155  # test-all.c does not comprise these tests, so we need to
156  # for this case to get features proper values
157  #
158  $(call feature_check,compile-32)
159  $(call feature_check,compile-x32)
160  $(call feature_check,bionic)
161  $(call feature_check,libbabeltrace)
162else
163  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
164endif
165
166#
167# Print the result of the feature test:
168#
169feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
170
171define feature_print_status_code
172  ifeq ($(feature-$(1)), 1)
173    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
174  else
175    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
176  endif
177endef
178
179feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
180define feature_print_text_code
181    MSG = $(shell printf '...%30s: %s' $(1) $(2))
182endef
183
184#
185# generates feature value assignment for name, like:
186#   $(call feature_assign,dwarf) == feature-dwarf=1
187#
188feature_assign = feature-$(1)=$(feature-$(1))
189
190FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
191FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
192
193feature_dump_check = $(eval $(feature_dump_check_code))
194define feature_dump_check_code
195  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
196    $(2) := 1
197  endif
198endef
199
200#
201# First check if any test from FEATURE_DISPLAY
202# and set feature_display := 1 if it does
203$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
204
205#
206# Now also check if any other test changed,
207# so we force FEATURE-DUMP generation
208$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
209
210# The $(feature_display) controls the default detection message
211# output. It's set if:
212# - detected features differes from stored features from
213#   last build (in $(FEATURE_DUMP_FILENAME) file)
214# - one of the $(FEATURE_DISPLAY) is not detected
215# - VF is enabled
216
217ifeq ($(feature_dump_changed),1)
218  $(shell rm -f $(FEATURE_DUMP_FILENAME))
219  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
220endif
221
222feature_display_check = $(eval $(feature_check_display_code))
223define feature_check_display_code
224  ifneq ($(feature-$(1)), 1)
225    feature_display := 1
226  endif
227endef
228
229$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
230
231ifeq ($(VF),1)
232  feature_display := 1
233  feature_verbose := 1
234endif
235
236ifeq ($(feature_display),1)
237  $(info )
238  $(info Auto-detecting system features:)
239  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
240  ifneq ($(feature_verbose),1)
241    $(info )
242  endif
243endif
244
245ifeq ($(feature_verbose),1)
246  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
247  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
248  $(info )
249endif
250