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 30# We need this, in case the user has it in its environment 31unexport CONFIG_ 32 33config-prog := conf 34menuconfig-prog := mconf 35nconfig-prog := nconf 36gconfig-prog := gconf 37xconfig-prog := qconf 38 39define config_rule 40PHONY += $(1) 41$(1): $(obj)/$($(1)-prog) 42 $(Q)$$< $(silent) $(Kconfig) 43 44PHONY += build_$(1) 45build_$(1): $(obj)/$($(1)-prog) 46endef 47 48$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c)))) 49 50PHONY += localmodconfig localyesconfig 51localyesconfig 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) \ 59 else \ 60 mv -f .tmp.config .config; \ 61 $< $(silent) --oldconfig $(Kconfig); \ 62 fi 63 $(Q)rm -f .tmp.config 64 65# These targets map 1:1 to the commandline options of 'conf' 66# 67# Note: 68# syncconfig has become an internal implementation detail and is now 69# deprecated for external use 70simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \ 71 alldefconfig randconfig listnewconfig olddefconfig syncconfig \ 72 helpnewconfig yes2modconfig mod2yesconfig mod2noconfig 73 74PHONY += $(simple-targets) 75 76$(simple-targets): $(obj)/conf 77 $(Q)$< $(silent) --$@ $(Kconfig) 78 79PHONY += savedefconfig defconfig 80 81savedefconfig: $(obj)/conf 82 $(Q)$< $(silent) --$@=defconfig $(Kconfig) 83 84defconfig: $(obj)/conf 85ifneq ($(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) 88else 89 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'" 90 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG) 91endif 92 93%_defconfig: $(obj)/conf 94 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig) 95 96configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@) 97 98%.config: $(obj)/conf 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 102 103PHONY += tinyconfig 104tinyconfig: 105 $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig 106 $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config 107 108# CHECK: -o cache_dir=<path> working? 109PHONY += testconfig 110testconfig: $(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) 114clean-files += tests/.cache 115 116# Help text used by make help 117help: 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)' 144 145# =========================================================================== 146# object files used by all kconfig flavours 147common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \ 148 preprocess.o symbol.o util.o 149 150$(obj)/lexer.lex.o: $(obj)/parser.tab.h 151HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src) 152HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src) 153 154# conf: Used for defconfig, oldconfig and related targets 155hostprogs += conf 156conf-objs := conf.o $(common-objs) 157 158# nconf: Used for the nconfig target based on ncurses 159hostprogs += nconf 160nconf-objs := nconf.o nconf.gui.o $(common-objs) 161 162HOSTLDLIBS_nconf = $(call read-file, $(obj)/nconf-libs) 163HOSTCFLAGS_nconf.o = $(call read-file, $(obj)/nconf-cflags) 164HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags) 165 166$(obj)/nconf: | $(obj)/nconf-libs 167$(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags 168 169# mconf: Used for the menuconfig target based on lxdialog 170hostprogs += mconf 171lxdialog := $(addprefix lxdialog/, \ 172 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o) 173mconf-objs := mconf.o $(lxdialog) $(common-objs) 174 175HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs) 176$(foreach f, mconf.o $(lxdialog), \ 177 $(eval HOSTCFLAGS_$f = $$(call read-file, $(obj)/mconf-cflags))) 178 179$(obj)/mconf: | $(obj)/mconf-libs 180$(addprefix $(obj)/, mconf.o $(lxdialog)): | $(obj)/mconf-cflags 181 182# qconf: Used for the xconfig target based on Qt 183hostprogs += qconf 184qconf-cxxobjs := qconf.o qconf-moc.o 185qconf-objs := images.o $(common-objs) 186 187HOSTLDLIBS_qconf = $(call read-file, $(obj)/qconf-libs) 188HOSTCXXFLAGS_qconf.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags) 189HOSTCXXFLAGS_qconf-moc.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags) 190$(obj)/qconf: | $(obj)/qconf-libs 191$(obj)/qconf.o $(obj)/qconf-moc.o: | $(obj)/qconf-cflags 192 193quiet_cmd_moc = MOC $@ 194 cmd_moc = $(call read-file, $(obj)/qconf-bin)/moc $< -o $@ 195 196$(obj)/qconf-moc.cc: $(src)/qconf.h FORCE | $(obj)/qconf-bin 197 $(call if_changed,moc) 198 199targets += qconf-moc.cc 200 201# gconf: Used for the gconfig target based on GTK+ 202hostprogs += gconf 203gconf-objs := gconf.o images.o $(common-objs) 204 205HOSTLDLIBS_gconf = $(call read-file, $(obj)/gconf-libs) 206HOSTCFLAGS_gconf.o = $(call read-file, $(obj)/gconf-cflags) 207 208$(obj)/gconf: | $(obj)/gconf-libs 209$(obj)/gconf.o: | $(obj)/gconf-cflags 210 211# check if necessary packages are available, and configure build flags 212cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin 213 214$(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh 215 $(call cmd,conf_cfg) 216 217clean-files += *conf-cflags *conf-libs *conf-bin 218