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