1 # SPDX-License-Identifier: GPL-2.0
2 # ===========================================================================
3 # Kernel configuration targets
4 # These targets are used from top-level makefile
7 Kconfig := $(KBUILD_KCONFIG)
12 ifndef KBUILD_DEFCONFIG
13 KBUILD_DEFCONFIG := defconfig
16 ifeq ($(quiet),silent_)
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 \
26 /boot/config-$(kernel-release)
28 KCONFIG_DEFCONFIG_LIST += arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)
30 # We need this, in case the user has it in its environment
34 menuconfig-prog := mconf
41 $(1): $(obj)/$($(1)-prog)
42 $(Q)$$< $(silent) $(Kconfig)
45 build_$(1): $(obj)/$($(1)-prog)
48 $(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
50 PHONY += localmodconfig localyesconfig
51 localyesconfig localmodconfig: $(obj)/conf
52 $(Q)$(PERL) $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
53 $(Q)if [ -f .config ]; then \
54 cmp -s .tmp.config .config || \
55 (mv -f .config .config.old.1; \
56 mv -f .tmp.config .config; \
57 $< $(silent) --oldconfig $(Kconfig); \
58 mv -f .config.old.1 .config.old) \
60 mv -f .tmp.config .config; \
61 $< $(silent) --oldconfig $(Kconfig); \
65 # These targets map 1:1 to the commandline options of 'conf'
68 # syncconfig has become an internal implementation detail and is now
69 # deprecated for external use
70 simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
71 alldefconfig randconfig listnewconfig olddefconfig syncconfig \
72 helpnewconfig yes2modconfig mod2yesconfig mod2noconfig
74 PHONY += $(simple-targets)
76 $(simple-targets): $(obj)/conf
77 $(Q)$< $(silent) --$@ $(Kconfig)
79 PHONY += savedefconfig defconfig
81 savedefconfig: $(obj)/conf
82 $(Q)$< $(silent) --$@=defconfig $(Kconfig)
84 defconfig: $(obj)/conf
85 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
86 @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
87 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
89 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
90 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
93 %_defconfig: $(obj)/conf
94 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
96 configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
99 $(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
100 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
101 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
105 $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
106 $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
108 # CHECK: -o cache_dir=<path> working?
110 testconfig: $(obj)/conf
111 $(Q)$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
112 -o cache_dir=$(abspath $(obj)/tests/.cache) \
113 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
114 clean-files += tests/.cache
116 # Help text used by make help
118 @echo ' config - Update current config utilising a line-oriented program'
119 @echo ' nconfig - Update current config utilising a ncurses menu based program'
120 @echo ' menuconfig - Update current config utilising a menu based program'
121 @echo ' xconfig - Update current config utilising a Qt based front-end'
122 @echo ' gconfig - Update current config utilising a GTK+ based front-end'
123 @echo ' oldconfig - Update current config utilising a provided .config as base'
124 @echo ' localmodconfig - Update current config disabling modules not loaded'
125 @echo ' except those preserved by LMC_KEEP environment variable'
126 @echo ' localyesconfig - Update current config converting local mods to core'
127 @echo ' except those preserved by LMC_KEEP environment variable'
128 @echo ' defconfig - New config with default from ARCH supplied defconfig'
129 @echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
130 @echo ' allnoconfig - New config where all options are answered with no'
131 @echo ' allyesconfig - New config where all options are accepted with yes'
132 @echo ' allmodconfig - New config selecting modules when possible'
133 @echo ' alldefconfig - New config with all symbols set to default'
134 @echo ' randconfig - New config with random answer to all options'
135 @echo ' yes2modconfig - Change answers from yes to mod if possible'
136 @echo ' mod2yesconfig - Change answers from mod to yes if possible'
137 @echo ' mod2noconfig - Change answers from mod to no if possible'
138 @echo ' listnewconfig - List new options'
139 @echo ' helpnewconfig - List new options and help text'
140 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
141 @echo ' default value without prompting'
142 @echo ' tinyconfig - Configure the tiniest possible kernel'
143 @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
145 # ===========================================================================
146 # object files used by all kconfig flavours
147 common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
148 preprocess.o symbol.o util.o
150 $(obj)/lexer.lex.o: $(obj)/parser.tab.h
151 HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src)
152 HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src)
154 # conf: Used for defconfig, oldconfig and related targets
156 conf-objs := conf.o $(common-objs)
158 # nconf: Used for the nconfig target based on ncurses
160 nconf-objs := nconf.o nconf.gui.o $(common-objs)
162 HOSTLDLIBS_nconf = $(shell . $(obj)/nconf-cfg && echo $$libs)
163 HOSTCFLAGS_nconf.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
164 HOSTCFLAGS_nconf.gui.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
166 $(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
168 # mconf: Used for the menuconfig target based on lxdialog
170 lxdialog := $(addprefix lxdialog/, \
171 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
172 mconf-objs := mconf.o $(lxdialog) $(common-objs)
174 HOSTLDLIBS_mconf = $(shell . $(obj)/mconf-cfg && echo $$libs)
175 $(foreach f, mconf.o $(lxdialog), \
176 $(eval HOSTCFLAGS_$f = $$(shell . $(obj)/mconf-cfg && echo $$$$cflags)))
178 $(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
180 # qconf: Used for the xconfig target based on Qt
182 qconf-cxxobjs := qconf.o qconf-moc.o
183 qconf-objs := images.o $(common-objs)
185 HOSTLDLIBS_qconf = $(shell . $(obj)/qconf-cfg && echo $$libs)
186 HOSTCXXFLAGS_qconf.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
187 HOSTCXXFLAGS_qconf-moc.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
189 $(obj)/qconf.o: $(obj)/qconf-cfg
191 quiet_cmd_moc = MOC $@
192 cmd_moc = $(shell . $(obj)/qconf-cfg && echo $$moc) $< -o $@
194 $(obj)/qconf-moc.cc: $(src)/qconf.h $(obj)/qconf-cfg FORCE
195 $(call if_changed,moc)
197 targets += qconf-moc.cc
199 # gconf: Used for the gconfig target based on GTK+
201 gconf-objs := gconf.o images.o $(common-objs)
203 HOSTLDLIBS_gconf = $(shell . $(obj)/gconf-cfg && echo $$libs)
204 HOSTCFLAGS_gconf.o = $(shell . $(obj)/gconf-cfg && echo $$cflags)
206 $(obj)/gconf.o: $(obj)/gconf-cfg
208 # check if necessary packages are available, and configure build flags
209 filechk_conf_cfg = $(CONFIG_SHELL) $<
211 $(obj)/%conf-cfg: $(src)/%conf-cfg.sh FORCE
212 $(call filechk,conf_cfg)
214 clean-files += *conf-cfg