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