xref: /openbmc/linux/tools/build/Makefile.feature (revision 9ac17575) 
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         libpfm4
103
104FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
105
106ifeq ($(FEATURE_TESTS),all)
107  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
108endif
109
110FEATURE_DISPLAY ?=              \
111         dwarf                  \
112         dwarf_getlocations     \
113         glibc                  \
114         gtk2                   \
115         libaudit               \
116         libbfd                 \
117         libcap                 \
118         libelf                 \
119         libnuma                \
120         numa_num_possible_cpus \
121         libperl                \
122         libpython              \
123         libcrypto              \
124         libunwind              \
125         libdw-dwarf-unwind     \
126         zlib                   \
127         lzma                   \
128         get_cpuid              \
129         bpf			\
130         libaio			\
131         libzstd		\
132         disassembler-four-args
133
134# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
135# If in the future we need per-feature checks/flags for features not
136# mentioned in this list we need to refactor this ;-).
137set_test_all_flags = $(eval $(set_test_all_flags_code))
138define set_test_all_flags_code
139  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
140  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
141endef
142
143$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
144
145#
146# Special fast-path for the 'all features are available' case:
147#
148$(call feature_check,all,$(MSG))
149
150#
151# Just in case the build freshly failed, make sure we print the
152# feature matrix:
153#
154ifeq ($(feature-all), 1)
155  #
156  # test-all.c passed - just set all the core feature flags to 1:
157  #
158  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
159  #
160  # test-all.c does not comprise these tests, so we need to
161  # for this case to get features proper values
162  #
163  $(call feature_check,compile-32)
164  $(call feature_check,compile-x32)
165  $(call feature_check,bionic)
166  $(call feature_check,libbabeltrace)
167else
168  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
169endif
170
171#
172# Print the result of the feature test:
173#
174feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
175
176define feature_print_status_code
177  ifeq ($(feature-$(1)), 1)
178    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
179  else
180    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
181  endif
182endef
183
184feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
185define feature_print_text_code
186    MSG = $(shell printf '...%30s: %s' $(1) $(2))
187endef
188
189#
190# generates feature value assignment for name, like:
191#   $(call feature_assign,dwarf) == feature-dwarf=1
192#
193feature_assign = feature-$(1)=$(feature-$(1))
194
195FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
196FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
197
198feature_dump_check = $(eval $(feature_dump_check_code))
199define feature_dump_check_code
200  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
201    $(2) := 1
202  endif
203endef
204
205#
206# First check if any test from FEATURE_DISPLAY
207# and set feature_display := 1 if it does
208$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
209
210#
211# Now also check if any other test changed,
212# so we force FEATURE-DUMP generation
213$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
214
215# The $(feature_display) controls the default detection message
216# output. It's set if:
217# - detected features differes from stored features from
218#   last build (in $(FEATURE_DUMP_FILENAME) file)
219# - one of the $(FEATURE_DISPLAY) is not detected
220# - VF is enabled
221
222ifeq ($(feature_dump_changed),1)
223  $(shell rm -f $(FEATURE_DUMP_FILENAME))
224  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
225endif
226
227feature_display_check = $(eval $(feature_check_display_code))
228define feature_check_display_code
229  ifneq ($(feature-$(1)), 1)
230    feature_display := 1
231  endif
232endef
233
234$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
235
236ifeq ($(VF),1)
237  feature_display := 1
238  feature_verbose := 1
239endif
240
241ifeq ($(feature_display),1)
242  $(info )
243  $(info Auto-detecting system features:)
244  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
245  ifneq ($(feature_verbose),1)
246    $(info )
247  endif
248endif
249
250ifeq ($(feature_verbose),1)
251  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
252  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
253  $(info )
254endif
255