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/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1))
97 all-config-fragments = $(call configfiles,*.config)
98 config-fragments = $(call configfiles,$@)
100 %.config: $(obj)/conf
101 $(if $(config-fragments),, $(error $@ fragment does not exists on this architecture))
102 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(config-fragments)
103 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
107 $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
108 $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
110 # CHECK: -o cache_dir=<path> working?
112 testconfig: $(obj)/conf
113 $(Q)$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
114 -o cache_dir=$(abspath $(obj)/tests/.cache) \
115 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
116 clean-files += tests/.cache
118 # Help text used by make help
120 @echo 'Configuration targets:'
121 @echo ' config - Update current config utilising a line-oriented program'
122 @echo ' nconfig - Update current config utilising a ncurses menu based program'
123 @echo ' menuconfig - Update current config utilising a menu based program'
124 @echo ' xconfig - Update current config utilising a Qt based front-end'
125 @echo ' gconfig - Update current config utilising a GTK+ based front-end'
126 @echo ' oldconfig - Update current config utilising a provided .config as base'
127 @echo ' localmodconfig - Update current config disabling modules not loaded'
128 @echo ' except those preserved by LMC_KEEP environment variable'
129 @echo ' localyesconfig - Update current config converting local mods to core'
130 @echo ' except those preserved by LMC_KEEP environment variable'
131 @echo ' defconfig - New config with default from ARCH supplied defconfig'
132 @echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
133 @echo ' allnoconfig - New config where all options are answered with no'
134 @echo ' allyesconfig - New config where all options are accepted with yes'
135 @echo ' allmodconfig - New config selecting modules when possible'
136 @echo ' alldefconfig - New config with all symbols set to default'
137 @echo ' randconfig - New config with random answer to all options'
138 @echo ' yes2modconfig - Change answers from yes to mod if possible'
139 @echo ' mod2yesconfig - Change answers from mod to yes if possible'
140 @echo ' mod2noconfig - Change answers from mod to no if possible'
141 @echo ' listnewconfig - List new options'
142 @echo ' helpnewconfig - List new options and help text'
143 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
144 @echo ' default value without prompting'
145 @echo ' tinyconfig - Configure the tiniest possible kernel'
146 @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
148 @echo 'Configuration topic targets:'
149 @$(foreach f, $(all-config-fragments), \
150 if help=$$(grep -m1 '^# Help: ' $(f)); then \
151 printf ' %-25s - %s\n' '$(notdir $(f))' "$${help#*: }"; \
154 # ===========================================================================
155 # object files used by all kconfig flavours
156 common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
157 preprocess.o symbol.o util.o
159 $(obj)/lexer.lex.o: $(obj)/parser.tab.h
160 HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src)
161 HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src)
163 # conf: Used for defconfig, oldconfig and related targets
165 conf-objs := conf.o $(common-objs)
167 # nconf: Used for the nconfig target based on ncurses
169 nconf-objs := nconf.o nconf.gui.o $(common-objs)
171 HOSTLDLIBS_nconf = $(call read-file, $(obj)/nconf-libs)
172 HOSTCFLAGS_nconf.o = $(call read-file, $(obj)/nconf-cflags)
173 HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags)
175 $(obj)/nconf: | $(obj)/nconf-libs
176 $(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags
178 # mconf: Used for the menuconfig target based on lxdialog
180 lxdialog := $(addprefix lxdialog/, \
181 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
182 mconf-objs := mconf.o $(lxdialog) $(common-objs)
184 HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs)
185 $(foreach f, mconf.o $(lxdialog), \
186 $(eval HOSTCFLAGS_$f = $$(call read-file, $(obj)/mconf-cflags)))
188 $(obj)/mconf: | $(obj)/mconf-libs
189 $(addprefix $(obj)/, mconf.o $(lxdialog)): | $(obj)/mconf-cflags
191 # qconf: Used for the xconfig target based on Qt
193 qconf-cxxobjs := qconf.o qconf-moc.o
194 qconf-objs := images.o $(common-objs)
196 HOSTLDLIBS_qconf = $(call read-file, $(obj)/qconf-libs)
197 HOSTCXXFLAGS_qconf.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
198 HOSTCXXFLAGS_qconf-moc.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
199 $(obj)/qconf: | $(obj)/qconf-libs
200 $(obj)/qconf.o $(obj)/qconf-moc.o: | $(obj)/qconf-cflags
202 quiet_cmd_moc = MOC $@
203 cmd_moc = $(call read-file, $(obj)/qconf-bin)/moc $< -o $@
205 $(obj)/qconf-moc.cc: $(src)/qconf.h FORCE | $(obj)/qconf-bin
206 $(call if_changed,moc)
208 targets += qconf-moc.cc
210 # gconf: Used for the gconfig target based on GTK+
212 gconf-objs := gconf.o images.o $(common-objs)
214 HOSTLDLIBS_gconf = $(call read-file, $(obj)/gconf-libs)
215 HOSTCFLAGS_gconf.o = $(call read-file, $(obj)/gconf-cflags)
217 $(obj)/gconf: | $(obj)/gconf-libs
218 $(obj)/gconf.o: | $(obj)/gconf-cflags
220 # check if necessary packages are available, and configure build flags
221 cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin
223 $(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
226 clean-files += *conf-cflags *conf-libs *conf-bin