util/kconfig/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   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 # We need this, in case the user has it in its environment
  31 unexport CONFIG_
  32
  33 config-prog     := conf
  34 menuconfig-prog := mconf
  35 nconfig-prog    := nconf
  36 gconfig-prog    := gconf
  37 xconfig-prog    := qconf
  38
  39 define config_rule
  40 PHONY += $(1)
  41 $(1): $(obj)/$($(1)-prog)
  42         $(Q)$$< $(silent) $(Kconfig)
  43
  44 PHONY += build_$(1)
  45 build_$(1): $(obj)/$($(1)-prog)
  46 endef
  47
  48 $(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
  49
  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)               \
  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
  70 simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
  71         alldefconfig randconfig listnewconfig olddefconfig syncconfig \
  72         helpnewconfig yes2modconfig mod2yesconfig mod2noconfig
  73
  74 PHONY += $(simple-targets)
  75
  76 $(simple-targets): $(obj)/conf
  77         $(Q)$< $(silent) --$@ $(Kconfig)
  78
  79 PHONY += savedefconfig defconfig
  80
  81 savedefconfig: $(obj)/conf
  82         $(Q)$< $(silent) --$@=defconfig $(Kconfig)
  83
  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)
  88 else
  89         @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
  90         $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
  91 endif
  92
  93 %_defconfig: $(obj)/conf
  94         $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
  95
  96 configfiles = $(wildcard $(srctree)/kernel/configs/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1))
  97 all-config-fragments = $(call configfiles,*.config)
  98 config-fragments = $(call configfiles,$@)
  99
 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
 104
 105 PHONY += tinyconfig
 106 tinyconfig:
 107         $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
 108         $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
 109
 110 # CHECK: -o cache_dir=<path> working?
 111 PHONY += testconfig
 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
 117
 118 # Help text used by make help
 119 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)'
 147         @echo  ''
 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))' "$${help#*: }"; \
 152                 fi;)
 153
 154 # ===========================================================================
 155 # object files used by all kconfig flavours
 156 common-objs     := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
 157                    preprocess.o symbol.o util.o
 158
 159 $(obj)/lexer.lex.o: $(obj)/parser.tab.h
 160 HOSTCFLAGS_lexer.lex.o  := -I $(srctree)/$(src)
 161 HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src)
 162
 163 # conf: Used for defconfig, oldconfig and related targets
 164 hostprogs       += conf
 165 conf-objs       := conf.o $(common-objs)
 166
 167 # nconf: Used for the nconfig target based on ncurses
 168 hostprogs       += nconf
 169 nconf-objs      := nconf.o nconf.gui.o $(common-objs)
 170
 171 HOSTLDLIBS_nconf       = $(call read-file, $(obj)/nconf-libs)
 172 HOSTCFLAGS_nconf.o     = $(call read-file, $(obj)/nconf-cflags)
 173 HOSTCFLAGS_nconf.gui.o = $(call read-file, $(obj)/nconf-cflags)
 174
 175 $(obj)/nconf: | $(obj)/nconf-libs
 176 $(obj)/nconf.o $(obj)/nconf.gui.o: | $(obj)/nconf-cflags
 177
 178 # mconf: Used for the menuconfig target based on lxdialog
 179 hostprogs       += mconf
 180 lxdialog        := $(addprefix lxdialog/, \
 181                      checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
 182 mconf-objs      := mconf.o $(lxdialog) $(common-objs)
 183
 184 HOSTLDLIBS_mconf = $(call read-file, $(obj)/mconf-libs)
 185 $(foreach f, mconf.o $(lxdialog), \
 186   $(eval HOSTCFLAGS_$f = $$(call read-file, $(obj)/mconf-cflags)))
 187
 188 $(obj)/mconf: | $(obj)/mconf-libs
 189 $(addprefix $(obj)/, mconf.o $(lxdialog)): | $(obj)/mconf-cflags
 190
 191 # qconf: Used for the xconfig target based on Qt
 192 hostprogs       += qconf
 193 qconf-cxxobjs   := qconf.o qconf-moc.o
 194 qconf-objs      := images.o $(common-objs)
 195
 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
 201
 202 quiet_cmd_moc = MOC     $@
 203       cmd_moc = $(call read-file, $(obj)/qconf-bin)/moc $< -o $@
 204
 205 $(obj)/qconf-moc.cc: $(src)/qconf.h FORCE | $(obj)/qconf-bin
 206         $(call if_changed,moc)
 207
 208 targets += qconf-moc.cc
 209
 210 # gconf: Used for the gconfig target based on GTK+
 211 hostprogs       += gconf
 212 gconf-objs      := gconf.o images.o $(common-objs)
 213
 214 HOSTLDLIBS_gconf   = $(call read-file, $(obj)/gconf-libs)
 215 HOSTCFLAGS_gconf.o = $(call read-file, $(obj)/gconf-cflags)
 216
 217 $(obj)/gconf: | $(obj)/gconf-libs
 218 $(obj)/gconf.o: | $(obj)/gconf-cflags
 219
 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
 222
 223 $(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
 224         $(call cmd,conf_cfg)
 225
 226 clean-files += *conf-cflags *conf-libs *conf-bin