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/$(KBUILD_DEFCONFIG) 29 30ifneq ($(findstring c, $(KBUILD_EXTRA_WARN)),) 31export KCONFIG_WARN_UNKNOWN_SYMBOLS=1 32endif 33 34ifneq ($(findstring e, $(KBUILD_EXTRA_WARN)),) 35export KCONFIG_WERROR=1 36endif 37 38# We need this, in case the user has it in its environment 39unexport CONFIG_ 40 41config-prog := conf 42menuconfig-prog := mconf 43nconfig-prog := nconf 44gconfig-prog := gconf 45xconfig-prog := qconf 46 47define config_rule 48PHONY += $(1) 49$(1): $(obj)/$($(1)-prog) 50 $(Q)$$< $(silent) $(Kconfig) 51 52PHONY += build_$(1) 53build_$(1): $(obj)/$($(1)-prog) 54endef 55 56$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c)))) 57 58PHONY += localmodconfig localyesconfig 59localyesconfig localmodconfig: $(obj)/conf 60 $(Q)$(PERL) $(srctree)/$(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 78simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \ 79 alldefconfig randconfig listnewconfig olddefconfig syncconfig \ 80 helpnewconfig yes2modconfig mod2yesconfig mod2noconfig 81 82PHONY += $(simple-targets) 83 84$(simple-targets): $(obj)/conf 85 $(Q)$< $(silent) --$@ $(Kconfig) 86 87PHONY += savedefconfig defconfig 88 89savedefconfig: $(obj)/conf 90 $(Q)$< $(silent) --$@=defconfig $(Kconfig) 91 92defconfig: $(obj)/conf 93ifneq ($(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) 96else 97 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'" 98 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG) 99endif 100 101%_defconfig: $(obj)/conf 102 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig) 103 104configfiles = $(wildcard $(srctree)/kernel/configs/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1)) 105all-config-fragments = $(call configfiles,*.config) 106config-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 113PHONY += tinyconfig 114tinyconfig: 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? 119PHONY += testconfig 120testconfig: $(obj)/conf 121 $(Q)$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \ 122 -o cache_dir=$(abspath $(obj)/tests/.cache) \ 123 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no) 124clean-files += tests/.cache 125 126# Help text used by make help 127help: 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))' "$${help#*: }"; \ 160 fi;) 161 162# =========================================================================== 163# object files used by all kconfig flavours 164common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \ 165 preprocess.o symbol.o util.o 166 167$(obj)/lexer.lex.o: $(obj)/parser.tab.h 168HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src) 169HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src) 170 171# conf: Used for defconfig, oldconfig and related targets 172hostprogs += conf 173conf-objs := conf.o $(common-objs) 174 175# nconf: Used for the nconfig target based on ncurses 176hostprogs += nconf 177nconf-objs := nconf.o nconf.gui.o mnconf-common.o $(common-objs) 178 179HOSTLDLIBS_nconf = $(call read-file, $(obj)/nconf-libs) 180HOSTCFLAGS_nconf.o = $(call read-file, $(obj)/nconf-cflags) 181HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags) 182 183$(obj)/nconf: | $(obj)/nconf-libs 184$(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags 185 186# mconf: Used for the menuconfig target based on lxdialog 187hostprogs += mconf 188lxdialog := $(addprefix lxdialog/, \ 189 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o) 190mconf-objs := mconf.o $(lxdialog) mnconf-common.o $(common-objs) 191 192HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs) 193$(foreach f, mconf.o $(lxdialog), \ 194 $(eval HOSTCFLAGS_$f = $$(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 200hostprogs += qconf 201qconf-cxxobjs := qconf.o qconf-moc.o 202qconf-objs := images.o $(common-objs) 203 204HOSTLDLIBS_qconf = $(call read-file, $(obj)/qconf-libs) 205HOSTCXXFLAGS_qconf.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags) 206HOSTCXXFLAGS_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 210quiet_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 216targets += qconf-moc.cc 217 218# gconf: Used for the gconfig target based on GTK+ 219hostprogs += gconf 220gconf-objs := gconf.o images.o $(common-objs) 221 222HOSTLDLIBS_gconf = $(call read-file, $(obj)/gconf-libs) 223HOSTCFLAGS_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 229cmd_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 234clean-files += *conf-cflags *conf-libs *conf-bin 235