projects/linux·blob master · refs

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1# SPDX-License-Identifier: GPL-2.0
2# ===========================================================================
3# Kernel configuration targets
4# These targets are used from top-level makefile
5
6ifdef KBUILD_KCONFIG
7Kconfig := $(KBUILD_KCONFIG)
8else
9Kconfig := Kconfig
10endif
11
12ifndef KBUILD_DEFCONFIG
13KBUILD_DEFCONFIG := defconfig
14endif
15
16ifeq ($(quiet),silent_)
17silent := -s
18endif
19
20export KCONFIG_DEFCONFIG_LIST :=
21ifndef cross_compiling
22kernel-release := $(shell uname -r)
23KCONFIG_DEFCONFIG_LIST += \
24 /lib/modules/$(kernel-release)/.config \
25 /etc/kernel-config \
26 /boot/config-$(kernel-release)
27endif
28KCONFIG_DEFCONFIG_LIST += arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)
29
30ifneq ($(findstring c, $(KBUILD_EXTRA_WARN)),)
31export KCONFIG_WARN_UNKNOWN_SYMBOLS=1
32endif
33
34ifneq ($(findstring e, $(KBUILD_EXTRA_WARN)),)
35export KCONFIG_WERROR=1
36endif
37
38# We need this, in case the user has it in its environment
39unexport CONFIG_
40
41config-prog := conf
42menuconfig-prog := mconf
43nconfig-prog := nconf
44gconfig-prog := gconf
45xconfig-prog := qconf
46
47define config_rule
48PHONY += $(1)
49$(1): $(obj)/$($(1)-prog)
50 $(Q)$$< $(silent) $(Kconfig)
51
52PHONY += build_$(1)
53build_$(1): $(obj)/$($(1)-prog)
54endef
55
56$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
57
58PHONY += localmodconfig localyesconfig
59localyesconfig localmodconfig: $(obj)/conf
60 $(Q)$(PERL) $(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
61 $(Q)if [ -f .config ]; then \
62 cmp -s .tmp.config .config || \
63 (mv -f .config .config.old.1; \
64 mv -f .tmp.config .config; \
65 $< $(silent) --oldconfig $(Kconfig); \
66 mv -f .config.old.1 .config.old) \
67 else \
68 mv -f .tmp.config .config; \
69 $< $(silent) --oldconfig $(Kconfig); \
70 fi
71 $(Q)rm -f .tmp.config
72
73# These targets map 1:1 to the commandline options of 'conf'
74#
75# Note:
76# syncconfig has become an internal implementation detail and is now
77# deprecated for external use
78simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
79 alldefconfig randconfig listnewconfig olddefconfig syncconfig \
80 helpnewconfig yes2modconfig mod2yesconfig mod2noconfig
81
82PHONY += $(simple-targets)
83
84$(simple-targets): $(obj)/conf
85 $(Q)$< $(silent) --$@ $(Kconfig)
86
87PHONY += savedefconfig defconfig
88
89savedefconfig: $(obj)/conf
90 $(Q)$< $(silent) --$@=defconfig $(Kconfig)
91
92defconfig: $(obj)/conf
93ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
94 @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
95 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
96else
97 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
98 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
99endif
100
101%_defconfig: $(obj)/conf
102 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
103
104configfiles = $(wildcard $(srctree)/kernel/configs/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1))
105all-config-fragments = $(call configfiles,*.config)
106config-fragments = $(call configfiles,$@)
107
108cmd_merge_fragments = $(srctree)/scripts/kconfig/merge_config.sh -m $(KCONFIG_CONFIG) $(config-fragments)
109
110%.config: $(obj)/conf
111 $(if $(config-fragments),, $(error $@ fragment does not exists on this architecture))
112 $(call cmd,merge_fragments)
113 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
114
115PHONY += tinyconfig
116tinyconfig:
117 $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
118 $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
119
120# CHECK: -o cache_dir=<path> working?
121PHONY += testconfig
122testconfig: $(obj)/conf
123 $(Q)$(PYTHON3) -B -m pytest $(src)/tests \
124 -o cache_dir=$(abspath $(obj)/tests/.cache) \
125 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
126clean-files += tests/.cache
127
128# Help text used by make help
129help:
130 @echo 'Configuration targets:'
131 @echo ' config - Update current config utilising a line-oriented program'
132 @echo ' nconfig - Update current config utilising a ncurses menu based program'
133 @echo ' menuconfig - Update current config utilising a menu based program'
134 @echo ' xconfig - Update current config utilising a Qt based front-end'
135 @echo ' gconfig - Update current config utilising a GTK+ based front-end'
136 @echo ' oldconfig - Update current config utilising a provided .config as base'
137 @echo ' localmodconfig - Update current config disabling modules not loaded'
138 @echo ' except those preserved by LMC_KEEP environment variable'
139 @echo ' localyesconfig - Update current config converting local mods to core'
140 @echo ' except those preserved by LMC_KEEP environment variable'
141 @echo ' defconfig - New config with default from ARCH supplied defconfig'
142 @echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
143 @echo ' allnoconfig - New config where all options are answered with no'
144 @echo ' allyesconfig - New config where all options are accepted with yes'
145 @echo ' allmodconfig - New config selecting modules when possible'
146 @echo ' alldefconfig - New config with all symbols set to default'
147 @echo ' randconfig - New config with random answer to all options'
148 @echo ' yes2modconfig - Change answers from yes to mod if possible'
149 @echo ' mod2yesconfig - Change answers from mod to yes if possible'
150 @echo ' mod2noconfig - Change answers from mod to no if possible'
151 @echo ' listnewconfig - List new options'
152 @echo ' helpnewconfig - List new options and help text'
153 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
154 @echo ' default value without prompting'
155 @echo ' tinyconfig - Configure the tiniest possible kernel'
156 @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
157 @echo ''
158 @echo 'Configuration topic targets:'
159 @$(foreach f, $(all-config-fragments), \
160 if help=$$(grep -m1 '^# Help: ' $(f)); then \
161 printf ' %-25s - %s\n' '$(notdir $(f))' "$${help#*: }"; \
162 fi;)
163
164# ===========================================================================
165# object files used by all kconfig flavours
166common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
167 preprocess.o symbol.o util.o
168
169$(obj)/lexer.lex.o: $(obj)/parser.tab.h
170HOSTCFLAGS_lexer.lex.o := -I $(src)
171HOSTCFLAGS_parser.tab.o := -I $(src)
172
173# conf: Used for defconfig, oldconfig and related targets
174hostprogs += conf
175conf-objs := conf.o $(common-objs)
176
177# nconf: Used for the nconfig target based on ncurses
178hostprogs += nconf
179nconf-objs := nconf.o nconf.gui.o mnconf-common.o $(common-objs)
180
181HOSTLDLIBS_nconf = $(call read-file, $(obj)/nconf-libs)
182HOSTCFLAGS_nconf.o = $(call read-file, $(obj)/nconf-cflags)
183HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags)
184
185$(obj)/nconf: | $(obj)/nconf-libs
186$(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags
187
188# mconf: Used for the menuconfig target based on lxdialog
189hostprogs += mconf
190lxdialog := $(addprefix lxdialog/, \
191 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
192mconf-objs := mconf.o $(lxdialog) mnconf-common.o $(common-objs)
193
194HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs)
195$(foreach f, mconf.o $(lxdialog), \
196 $(eval HOSTCFLAGS_$f = $$(call read-file, $(obj)/mconf-cflags)))
197
198$(obj)/mconf: | $(obj)/mconf-libs
199$(addprefix $(obj)/, mconf.o $(lxdialog)): | $(obj)/mconf-cflags
200
201# qconf: Used for the xconfig target based on Qt
202hostprogs += qconf
203qconf-cxxobjs := qconf.o qconf-moc.o
204qconf-objs := $(common-objs)
205
206HOSTLDLIBS_qconf = $(call read-file, $(obj)/qconf-libs)
207HOSTCXXFLAGS_qconf.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
208HOSTCXXFLAGS_qconf-moc.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
209$(obj)/qconf: | $(obj)/qconf-libs
210$(obj)/qconf.o $(obj)/qconf-moc.o: | $(obj)/qconf-cflags
211
212quiet_cmd_moc = MOC $@
213 cmd_moc = $(call read-file, $(obj)/qconf-bin)/moc $< -o $@
214
215$(obj)/qconf-moc.cc: $(src)/qconf.h FORCE | $(obj)/qconf-bin
216 $(call if_changed,moc)
217
218targets += qconf-moc.cc
219
220# gconf: Used for the gconfig target based on GTK+
221hostprogs += gconf
222gconf-objs := gconf.o $(common-objs)
223
224HOSTLDLIBS_gconf = $(call read-file, $(obj)/gconf-libs)
225HOSTCFLAGS_gconf.o = $(call read-file, $(obj)/gconf-cflags)
226
227$(obj)/gconf: | $(obj)/gconf-libs
228$(obj)/gconf.o: | $(obj)/gconf-cflags
229
230# check if necessary packages are available, and configure build flags
231cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin
232
233$(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
234 $(call cmd,conf_cfg)
235
236clean-files += *conf-cflags *conf-libs *conf-bin