xref: /openbmc/linux/tools/build/Makefile.feature (revision 0c94efab) 
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        glibc                           \
40        gtk2                            \
41        gtk2-infobar                    \
42        libaudit                        \
43        libbfd                          \
44        libelf                          \
45        libelf-getphdrnum               \
46        libelf-gelf_getnote             \
47        libelf-getshdrstrndx            \
48        libelf-mmap                     \
49        libnuma                         \
50        numa_num_possible_cpus          \
51        libperl                         \
52        libpython                       \
53        libpython-version               \
54        libslang                        \
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
74# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
75# of all feature tests
76FEATURE_TESTS_EXTRA :=                  \
77         bionic                         \
78         compile-32                     \
79         compile-x32                    \
80         cplus-demangle                 \
81         hello                          \
82         libbabeltrace                  \
83         libbfd-liberty                 \
84         libbfd-liberty-z               \
85         libopencsd                     \
86         libunwind-x86                  \
87         libunwind-x86_64               \
88         libunwind-arm                  \
89         libunwind-aarch64              \
90         libunwind-debug-frame          \
91         libunwind-debug-frame-arm      \
92         libunwind-debug-frame-aarch64  \
93         cxx                            \
94         llvm                           \
95         llvm-version                   \
96         clang
97
98FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
99
100ifeq ($(FEATURE_TESTS),all)
101  FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
102endif
103
104FEATURE_DISPLAY ?=              \
105         dwarf                  \
106         dwarf_getlocations     \
107         glibc                  \
108         gtk2                   \
109         libaudit               \
110         libbfd                 \
111         libelf                 \
112         libnuma                \
113         numa_num_possible_cpus \
114         libperl                \
115         libpython              \
116         libslang               \
117         libcrypto              \
118         libunwind              \
119         libdw-dwarf-unwind     \
120         zlib                   \
121         lzma                   \
122         get_cpuid              \
123         bpf			\
124         libaio			\
125         libzstd		\
126         disassembler-four-args
127
128# Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
129# If in the future we need per-feature checks/flags for features not
130# mentioned in this list we need to refactor this ;-).
131set_test_all_flags = $(eval $(set_test_all_flags_code))
132define set_test_all_flags_code
133  FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
134  FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
135endef
136
137$(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
138
139#
140# Special fast-path for the 'all features are available' case:
141#
142$(call feature_check,all,$(MSG))
143
144#
145# Just in case the build freshly failed, make sure we print the
146# feature matrix:
147#
148ifeq ($(feature-all), 1)
149  #
150  # test-all.c passed - just set all the core feature flags to 1:
151  #
152  $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
153  #
154  # test-all.c does not comprise these tests, so we need to
155  # for this case to get features proper values
156  #
157  $(call feature_check,compile-32)
158  $(call feature_check,compile-x32)
159  $(call feature_check,bionic)
160  $(call feature_check,libbabeltrace)
161else
162  $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
163endif
164
165#
166# Print the result of the feature test:
167#
168feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
169
170define feature_print_status_code
171  ifeq ($(feature-$(1)), 1)
172    MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
173  else
174    MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
175  endif
176endef
177
178feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
179define feature_print_text_code
180    MSG = $(shell printf '...%30s: %s' $(1) $(2))
181endef
182
183#
184# generates feature value assignment for name, like:
185#   $(call feature_assign,dwarf) == feature-dwarf=1
186#
187feature_assign = feature-$(1)=$(feature-$(1))
188
189FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
190FEATURE_DUMP := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
191
192feature_dump_check = $(eval $(feature_dump_check_code))
193define feature_dump_check_code
194  ifeq ($(findstring $(1),$(FEATURE_DUMP)),)
195    $(2) := 1
196  endif
197endef
198
199#
200# First check if any test from FEATURE_DISPLAY
201# and set feature_display := 1 if it does
202$(foreach feat,$(FEATURE_DISPLAY),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_display))
203
204#
205# Now also check if any other test changed,
206# so we force FEATURE-DUMP generation
207$(foreach feat,$(FEATURE_TESTS),$(call feature_dump_check,$(call feature_assign,$(feat)),feature_dump_changed))
208
209# The $(feature_display) controls the default detection message
210# output. It's set if:
211# - detected features differes from stored features from
212#   last build (in $(FEATURE_DUMP_FILENAME) file)
213# - one of the $(FEATURE_DISPLAY) is not detected
214# - VF is enabled
215
216ifeq ($(feature_dump_changed),1)
217  $(shell rm -f $(FEATURE_DUMP_FILENAME))
218  $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))
219endif
220
221feature_display_check = $(eval $(feature_check_display_code))
222define feature_check_display_code
223  ifneq ($(feature-$(1)), 1)
224    feature_display := 1
225  endif
226endef
227
228$(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
229
230ifeq ($(VF),1)
231  feature_display := 1
232  feature_verbose := 1
233endif
234
235ifeq ($(feature_display),1)
236  $(info )
237  $(info Auto-detecting system features:)
238  $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
239  ifneq ($(feature_verbose),1)
240    $(info )
241  endif
242endif
243
244ifeq ($(feature_verbose),1)
245  TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
246  $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
247  $(info )
248endif
249