Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / tools / build / Makefile.feature
1 feature_dir := $(srctree)/tools/build/feature
2
3 ifneq ($(OUTPUT),)
4   OUTPUT_FEATURES = $(OUTPUT)feature/
5   $(shell mkdir -p $(OUTPUT_FEATURES))
6 endif
7
8 feature_check = $(eval $(feature_check_code))
9 define feature_check_code
10   feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
11 endef
12
13 feature_set = $(eval $(feature_set_code))
14 define feature_set_code
15   feature-$(1) := 1
16 endef
17
18 #
19 # Build the feature check binaries in parallel, ignore errors, ignore return value and suppress output:
20 #
21
22 #
23 # Note that this is not a complete list of all feature tests, just
24 # those that are typically built on a fully configured system.
25 #
26 # [ Feature tests not mentioned here have to be built explicitly in
27 #   the rule that uses them - an example for that is the 'bionic'
28 #   feature check. ]
29 #
30 FEATURE_TESTS =                 \
31         backtrace                       \
32         dwarf                           \
33         fortify-source                  \
34         sync-compare-and-swap           \
35         glibc                           \
36         gtk2                            \
37         gtk2-infobar                    \
38         libaudit                        \
39         libbfd                          \
40         libelf                          \
41         libelf-getphdrnum               \
42         libelf-mmap                     \
43         libnuma                         \
44         libperl                         \
45         libpython                       \
46         libpython-version               \
47         libslang                        \
48         libunwind                       \
49         pthread-attr-setaffinity-np     \
50         stackprotector-all              \
51         timerfd                         \
52         libdw-dwarf-unwind              \
53         zlib                            \
54         lzma
55
56 FEATURE_DISPLAY =                       \
57         dwarf                           \
58         glibc                           \
59         gtk2                            \
60         libaudit                        \
61         libbfd                          \
62         libelf                          \
63         libnuma                         \
64         libperl                         \
65         libpython                       \
66         libslang                        \
67         libunwind                       \
68         libdw-dwarf-unwind              \
69         zlib                            \
70         lzma
71
72 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
73 # If in the future we need per-feature checks/flags for features not
74 # mentioned in this list we need to refactor this ;-).
75 set_test_all_flags = $(eval $(set_test_all_flags_code))
76 define set_test_all_flags_code
77   FEATURE_CHECK_CFLAGS-all  += $(FEATURE_CHECK_CFLAGS-$(1))
78   FEATURE_CHECK_LDFLAGS-all += $(FEATURE_CHECK_LDFLAGS-$(1))
79 endef
80
81 $(foreach feat,$(FEATURE_TESTS),$(call set_test_all_flags,$(feat)))
82
83 #
84 # Special fast-path for the 'all features are available' case:
85 #
86 $(call feature_check,all,$(MSG))
87
88 #
89 # Just in case the build freshly failed, make sure we print the
90 # feature matrix:
91 #
92 ifeq ($(feature-all), 1)
93   #
94   # test-all.c passed - just set all the core feature flags to 1:
95   #
96   $(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
97 else
98   $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS)" LDFLAGS=$(LDFLAGS) -i -j -C $(feature_dir) $(addsuffix .bin,$(FEATURE_TESTS)) >/dev/null 2>&1)
99   $(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
100 endif
101
102 #
103 # Print the result of the feature test:
104 #
105 feature_print_status = $(eval $(feature_print_status_code)) $(info $(MSG))
106
107 define feature_print_status_code
108   ifeq ($(feature-$(1)), 1)
109     MSG = $(shell printf '...%30s: [ \033[32mon\033[m  ]' $(1))
110   else
111     MSG = $(shell printf '...%30s: [ \033[31mOFF\033[m ]' $(1))
112   endif
113 endef
114
115 feature_print_text = $(eval $(feature_print_text_code)) $(info $(MSG))
116 define feature_print_text_code
117     MSG = $(shell printf '...%30s: %s' $(1) $(2))
118 endef
119
120 FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
121 FEATURE_DUMP_FILE := $(shell touch $(OUTPUT)FEATURE-DUMP; cat $(OUTPUT)FEATURE-DUMP)
122
123 ifeq ($(dwarf-post-unwind),1)
124   FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
125 endif
126
127 # The $(feature_display) controls the default detection message
128 # output. It's set if:
129 # - detected features differes from stored features from
130 #   last build (in FEATURE-DUMP file)
131 # - one of the $(FEATURE_DISPLAY) is not detected
132 # - VF is enabled
133
134 ifneq ("$(FEATURE_DUMP)","$(FEATURE_DUMP_FILE)")
135   $(shell echo "$(FEATURE_DUMP)" > $(OUTPUT)FEATURE-DUMP)
136   feature_display := 1
137 endif
138
139 feature_display_check = $(eval $(feature_check_code))
140 define feature_display_check_code
141   ifneq ($(feature-$(1)), 1)
142     feature_display := 1
143   endif
144 endef
145
146 $(foreach feat,$(FEATURE_DISPLAY),$(call feature_display_check,$(feat)))
147
148 ifeq ($(VF),1)
149   feature_display := 1
150   feature_verbose := 1
151 endif
152
153 ifeq ($(feature_display),1)
154   $(info )
155   $(info Auto-detecting system features:)
156   $(foreach feat,$(FEATURE_DISPLAY),$(call feature_print_status,$(feat),))
157
158   ifeq ($(dwarf-post-unwind),1)
159     $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text))
160   endif
161
162   ifneq ($(feature_verbose),1)
163     $(info )
164   endif
165 endif
166
167 ifeq ($(feature_verbose),1)
168   TMP := $(filter-out $(FEATURE_DISPLAY),$(FEATURE_TESTS))
169   $(foreach feat,$(TMP),$(call feature_print_status,$(feat),))
170   $(info )
171 endif