scripts/kconfig/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # ===========================================================================
   3 # Kernel configuration targets
   4 # These targets are used from top-level makefile
   5
   6 ifdef KBUILD_KCONFIG
   7 Kconfig := $(KBUILD_KCONFIG)
   8 else
   9 Kconfig := Kconfig
  10 endif
  11
  12 ifndef KBUILD_DEFCONFIG
  13 KBUILD_DEFCONFIG := defconfig
  14 endif
  15
  16 ifeq ($(quiet),silent_)
  17 silent := -s
  18 endif
  19
  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 \
  25         /etc/kernel-config \
  26         /boot/config-$(kernel-release)
  27 endif
  28 KCONFIG_DEFCONFIG_LIST += arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)
  29
  30 ifneq ($(findstring c, $(KBUILD_EXTRA_WARN)),)
  31 export KCONFIG_WARN_UNKNOWN_SYMBOLS=1
  32 endif
  33
  34 ifneq ($(findstring e, $(KBUILD_EXTRA_WARN)),)
  35 export KCONFIG_WERROR=1
  36 endif
  37
  38 # We need this, in case the user has it in its environment
  39 unexport CONFIG_
  40
  41 config-prog     := conf
  42 menuconfig-prog := mconf
  43 nconfig-prog    := nconf
  44 gconfig-prog    := gconf
  45 xconfig-prog    := qconf
  46
  47 define config_rule
  48 PHONY += $(1)
  49 $(1): $(obj)/$($(1)-prog)
  50         $(Q)$$< $(silent) $(Kconfig)
  51
  52 PHONY += build_$(1)
  53 build_$(1): $(obj)/$($(1)-prog)
  54 endef
  55
  56 $(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
  57
  58 PHONY += localmodconfig localyesconfig
  59 localyesconfig localmodconfig: $(obj)/conf
  60         $(Q)$(PERL) $(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
  78 simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
  79         alldefconfig randconfig listnewconfig olddefconfig syncconfig \
  80         helpnewconfig yes2modconfig mod2yesconfig mod2noconfig
  81
  82 PHONY += $(simple-targets)
  83
  84 $(simple-targets): $(obj)/conf
  85         $(Q)$< $(silent) --$@ $(Kconfig)
  86
  87 PHONY += savedefconfig defconfig
  88
  89 savedefconfig: $(obj)/conf
  90         $(Q)$< $(silent) --$@=defconfig $(Kconfig)
  91
  92 defconfig: $(obj)/conf
  93 ifneq ($(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)
  96 else
  97         @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
  98         $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
  99 endif
 100
 101 %_defconfig: $(obj)/conf
 102         $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
 103
 104 configfiles = $(wildcard $(srctree)/kernel/configs/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1))
 105 all-config-fragments = $(call configfiles,*.config)
 106 config-fragments = $(call configfiles,$@)
 107
 108 cmd_merge_fragments = $(srctree)/scripts/kconfig/merge_config.sh -m $(KCONFIG_CONFIG) $(config-fragments)
 109
 110 %.config: $(obj)/conf
 111         $(if $(config-fragments),, $(error $@ fragment does not exists on this architecture))
 112         $(call cmd,merge_fragments)
 113         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 114
 115 PHONY += tinyconfig
 116 tinyconfig:
 117         $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
 118         $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
 119
 120 # CHECK: -o cache_dir=<path> working?
 121 PHONY += testconfig
 122 testconfig: $(obj)/conf
 123         $(Q)$(PYTHON3) -B -m pytest $(src)/tests \
 124         -o cache_dir=$(abspath $(obj)/tests/.cache) \
 125         $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
 126 clean-files += tests/.cache
 127
 128 # Help text used by make help
 129 help:
 130         @echo  'Configuration targets:'
 131         @echo  '  config          - Update current config utilising a line-oriented program'
 132         @echo  '  nconfig         - Update current config utilising a ncurses menu based program'
 133         @echo  '  menuconfig      - Update current config utilising a menu based program'
 134         @echo  '  xconfig         - Update current config utilising a Qt based front-end'
 135         @echo  '  gconfig         - Update current config utilising a GTK+ based front-end'
 136         @echo  '  oldconfig       - Update current config utilising a provided .config as base'
 137         @echo  '  localmodconfig  - Update current config disabling modules not loaded'
 138         @echo  '                    except those preserved by LMC_KEEP environment variable'
 139         @echo  '  localyesconfig  - Update current config converting local mods to core'
 140         @echo  '                    except those preserved by LMC_KEEP environment variable'
 141         @echo  '  defconfig       - New config with default from ARCH supplied defconfig'
 142         @echo  '  savedefconfig   - Save current config as ./defconfig (minimal config)'
 143         @echo  '  allnoconfig     - New config where all options are answered with no'
 144         @echo  '  allyesconfig    - New config where all options are accepted with yes'
 145         @echo  '  allmodconfig    - New config selecting modules when possible'
 146         @echo  '  alldefconfig    - New config with all symbols set to default'
 147         @echo  '  randconfig      - New config with random answer to all options'
 148         @echo  '  yes2modconfig   - Change answers from yes to mod if possible'
 149         @echo  '  mod2yesconfig   - Change answers from mod to yes if possible'
 150         @echo  '  mod2noconfig    - Change answers from mod to no if possible'
 151         @echo  '  listnewconfig   - List new options'
 152         @echo  '  helpnewconfig   - List new options and help text'
 153         @echo  '  olddefconfig    - Same as oldconfig but sets new symbols to their'
 154         @echo  '                    default value without prompting'
 155         @echo  '  tinyconfig      - Configure the tiniest possible kernel'
 156         @echo  '  testconfig      - Run Kconfig unit tests (requires python3 and pytest)'
 157         @echo  ''
 158         @echo  'Configuration topic targets:'
 159         @$(foreach f, $(all-config-fragments), \
 160                 if help=$$(grep -m1 '^# Help: ' $(f)); then \
 161                         printf '  %-25s - %s\n' '$(notdir $(f))' "$${help#*: }"; \
 162                 fi;)
 163
 164 # ===========================================================================
 165 # object files used by all kconfig flavours
 166 common-objs     := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
 167                    preprocess.o symbol.o util.o
 168
 169 $(obj)/lexer.lex.o: $(obj)/parser.tab.h
 170 HOSTCFLAGS_lexer.lex.o  := -I $(src)
 171 HOSTCFLAGS_parser.tab.o := -I $(src)
 172
 173 # conf: Used for defconfig, oldconfig and related targets
 174 hostprogs       += conf
 175 conf-objs       := conf.o $(common-objs)
 176
 177 # nconf: Used for the nconfig target based on ncurses
 178 hostprogs       += nconf
 179 nconf-objs      := nconf.o nconf.gui.o mnconf-common.o $(common-objs)
 180
 181 HOSTLDLIBS_nconf       = $(call read-file, $(obj)/nconf-libs)
 182 HOSTCFLAGS_nconf.o     = $(call read-file, $(obj)/nconf-cflags)
 183 HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags)
 184
 185 $(obj)/nconf: | $(obj)/nconf-libs
 186 $(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags
 187
 188 # mconf: Used for the menuconfig target based on lxdialog
 189 hostprogs       += mconf
 190 lxdialog        := $(addprefix lxdialog/, \
 191                      checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
 192 mconf-objs      := mconf.o $(lxdialog) mnconf-common.o $(common-objs)
 193
 194 HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs)
 195 $(foreach f, mconf.o $(lxdialog), \
 196   $(eval HOSTCFLAGS_$f = $$(call read-file, $(obj)/mconf-cflags)))
 197
 198 $(obj)/mconf: | $(obj)/mconf-libs
 199 $(addprefix $(obj)/, mconf.o $(lxdialog)): | $(obj)/mconf-cflags
 200
 201 # qconf: Used for the xconfig target based on Qt
 202 hostprogs       += qconf
 203 qconf-cxxobjs   := qconf.o qconf-moc.o
 204 qconf-objs      := images.o $(common-objs)
 205
 206 HOSTLDLIBS_qconf         = $(call read-file, $(obj)/qconf-libs)
 207 HOSTCXXFLAGS_qconf.o     = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
 208 HOSTCXXFLAGS_qconf-moc.o = -std=c++11 -fPIC $(call read-file, $(obj)/qconf-cflags)
 209 $(obj)/qconf: | $(obj)/qconf-libs
 210 $(obj)/qconf.o $(obj)/qconf-moc.o: | $(obj)/qconf-cflags
 211
 212 quiet_cmd_moc = MOC     $@
 213       cmd_moc = $(call read-file, $(obj)/qconf-bin)/moc $< -o $@
 214
 215 $(obj)/qconf-moc.cc: $(src)/qconf.h FORCE | $(obj)/qconf-bin
 216         $(call if_changed,moc)
 217
 218 targets += qconf-moc.cc
 219
 220 # gconf: Used for the gconfig target based on GTK+
 221 hostprogs       += gconf
 222 gconf-objs      := gconf.o images.o $(common-objs)
 223
 224 HOSTLDLIBS_gconf   = $(call read-file, $(obj)/gconf-libs)
 225 HOSTCFLAGS_gconf.o = $(call read-file, $(obj)/gconf-cflags)
 226
 227 $(obj)/gconf: | $(obj)/gconf-libs
 228 $(obj)/gconf.o: | $(obj)/gconf-cflags
 229
 230 # check if necessary packages are available, and configure build flags
 231 cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin
 232
 233 $(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
 234         $(call cmd,conf_cfg)
 235
 236 clean-files += *conf-cflags *conf-libs *conf-bin