xref: /openbmc/linux/tools/build/Makefile.feature (revision 29d97219) 
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        libtraceevent                   \
56        libcrypto                       \
57        libunwind                       \
58        pthread-attr-setaffinity-np     \
59        pthread-barrier     		\
60        reallocarray                    \
61        stackprotector-all              \
62        timerfd                         \
63        libdw-dwarf-unwind              \
64        zlib                            \
65        lzma                            \
66        get_cpuid                       \
67        bpf                             \
68        sched_getcpu			\
69        sdt				\
70        setns				\
71        libaio				\
72        libzstd				\
73        disassembler-four-args		\
74        file-handle
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         gtk2                           \
84         gtk2-infobar                   \
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         libpfm4                        \
103         libdebuginfod			\
104         clang-bpf-co-re
105
106
107FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
108
109ifeq ($(FEATURE_TESTS),all)
110  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
111endif
112
113FEATURE_DISPLAY ?=              \
114         dwarf                  \
115         dwarf_getlocations     \
116         glibc                  \
117         libbfd                 \
118         libbfd-buildid		\
119         libcap                 \
120         libelf                 \
121         libnuma                \
122         numa_num_possible_cpus \
123         libperl                \
124         libpython              \
125         libcrypto              \
126         libunwind              \
127         libdw-dwarf-unwind     \
128         zlib                   \
129         lzma                   \
130         get_cpuid              \
131         bpf			\
132         libaio			\
133         libzstd		\
134         disassembler-four-args
135
136# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
137# If in the future we need per-feature checks/flags for features not
138# mentioned in this list we need to refactor this ;-).
139set_test_all_flags = $(eval $(set_test_all_flags_code))
140define set_test_all_flags_code
141  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
142  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
143endef
144
145$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
146
147#
148# Special fast-path for the 'all features are available' case:
149#
150$(call feature_check,all,$(MSG))
151
152#
153# Just in case the build freshly failed, make sure we print the
154# feature matrix:
155#
156ifeq ($(feature-all), 1)
157  #
158  # test-all.c passed - just set all the core feature flags to 1:
159  #
160  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
161  #
162  # test-all.c does not comprise these tests, so we need to
163  # for this case to get features proper values
164  #
165  $(call feature_check,compile-32)
166  $(call feature_check,compile-x32)
167  $(call feature_check,bionic)
168  $(call feature_check,libbabeltrace)
169else
170  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
171endif
172
173#
174# Print the result of the feature test:
175#
176feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
177
178define feature_print_status_code
179  ifeq ($(feature-$(1)), 1)
180    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
181  else
182    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
183  endif
184endef
185
186feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
187define feature_print_text_code
188    MSG = $(shell printf '...%30s: %s' $(1) $(2))
189endef
190
191#
192# generates feature value assignment for name, like:
193#   $(call feature_assign,dwarf) == feature-dwarf=1
194#
195feature_assign = feature-$(1)=$(feature-$(1))
196
197FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
198FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
199
200feature_dump_check = $(eval $(feature_dump_check_code))
201define feature_dump_check_code
202  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
203    $(2) := 1
204  endif
205endef
206
207#
208# First check if any test from FEATURE_DISPLAY
209# and set feature_display := 1 if it does
210$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
211
212#
213# Now also check if any other test changed,
214# so we force FEATURE-DUMP generation
215$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
216
217# The $(feature_display) controls the default detection message
218# output. It's set if:
219# - detected features differes from stored features from
220#   last build (in $(FEATURE_DUMP_FILENAME) file)
221# - one of the $(FEATURE_DISPLAY) is not detected
222# - VF is enabled
223
224ifeq ($(feature_dump_changed),1)
225  $(shell rm -f $(FEATURE_DUMP_FILENAME))
226  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
227endif
228
229feature_display_check = $(eval $(feature_check_display_code))
230define feature_check_display_code
231  ifneq ($(feature-$(1)), 1)
232    feature_display := 1
233  endif
234endef
235
236$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
237
238ifeq ($(VF),1)
239  feature_display := 1
240  feature_verbose := 1
241endif
242
243feature_display_entries = $(eval $(feature_display_entries_code))
244define feature_display_entries_code
245  ifeq ($(feature_display),1)
246    $(info )
247    $(info Auto-detecting system features:)
248    $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
249    ifneq ($(feature_verbose),1)
250      $(info )
251    endif
252  endif
253
254  ifeq ($(feature_verbose),1)
255    TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
256    $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
257    $(info )
258  endif
259endef
260
261ifeq ($(FEATURE_DISPLAY_DEFERRED),)
262  $(call feature_display_entries)
263endif
264