1# SPDX-License-Identifier: GPL-2.0
2# ===========================================================================
3# Kernel configuration targets
4# These targets are used from top-level makefile
5
6PHONY += xconfig gconfig menuconfig config localmodconfig localyesconfig \
7	build_menuconfig build_nconfig build_gconfig build_xconfig
8
9ifdef KBUILD_KCONFIG
10Kconfig := $(KBUILD_KCONFIG)
11else
12Kconfig := Kconfig
13endif
14
15ifndef KBUILD_DEFCONFIG
16KBUILD_DEFCONFIG := defconfig
17endif
18
19ifeq ($(quiet),silent_)
20silent := -s
21endif
22
23# We need this, in case the user has it in its environment
24unexport CONFIG_
25
26xconfig: $(obj)/qconf
27	$< $(silent) $(Kconfig)
28
29gconfig: $(obj)/gconf
30	$< $(silent) $(Kconfig)
31
32menuconfig: $(obj)/mconf
33	$< $(silent) $(Kconfig)
34
35config: $(obj)/conf
36	$< $(silent) --oldaskconfig $(Kconfig)
37
38nconfig: $(obj)/nconf
39	$< $(silent) $(Kconfig)
40
41build_menuconfig: $(obj)/mconf
42
43build_nconfig: $(obj)/nconf
44
45build_gconfig: $(obj)/gconf
46
47build_xconfig: $(obj)/qconf
48
49localyesconfig localmodconfig: $(obj)/conf
50	$(Q)perl $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
51	$(Q)if [ -f .config ]; then 					\
52			cmp -s .tmp.config .config ||			\
53			(mv -f .config .config.old.1;			\
54			 mv -f .tmp.config .config;			\
55			 $< $(silent) --oldconfig $(Kconfig);		\
56			 mv -f .config.old.1 .config.old)		\
57	else								\
58			mv -f .tmp.config .config;			\
59			$< $(silent) --oldconfig $(Kconfig);		\
60	fi
61	$(Q)rm -f .tmp.config
62
63# These targets map 1:1 to the commandline options of 'conf'
64#
65# Note:
66#  syncconfig has become an internal implementation detail and is now
67#  deprecated for external use
68simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
69	alldefconfig randconfig listnewconfig olddefconfig syncconfig
70PHONY += $(simple-targets)
71
72$(simple-targets): $(obj)/conf
73	$< $(silent) --$@ $(Kconfig)
74
75PHONY += savedefconfig defconfig
76
77savedefconfig: $(obj)/conf
78	$< $(silent) --$@=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 += kvmconfig
100kvmconfig: kvm_guest.config
101	@:
102
103PHONY += xenconfig
104xenconfig: xen.config
105	@:
106
107PHONY += tinyconfig
108tinyconfig:
109	$(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
110
111# CHECK: -o cache_dir=<path> working?
112PHONY += testconfig
113testconfig: $(obj)/conf
114	$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
115	-o cache_dir=$(abspath $(obj)/tests/.cache) \
116	$(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
117clean-files += tests/.cache
118
119# Help text used by make help
120help:
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  '  localyesconfig  - Update current config converting local mods to core'
129	@echo  '  defconfig	  - New config with default from ARCH supplied defconfig'
130	@echo  '  savedefconfig   - Save current config as ./defconfig (minimal config)'
131	@echo  '  allnoconfig	  - New config where all options are answered with no'
132	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
133	@echo  '  allmodconfig	  - New config selecting modules when possible'
134	@echo  '  alldefconfig    - New config with all symbols set to default'
135	@echo  '  randconfig	  - New config with random answer to all options'
136	@echo  '  listnewconfig   - List new options'
137	@echo  '  olddefconfig	  - Same as oldconfig but sets new symbols to their'
138	@echo  '                    default value without prompting'
139	@echo  '  kvmconfig	  - Enable additional options for kvm guest kernel support'
140	@echo  '  xenconfig       - Enable additional options for xen dom0 and guest kernel support'
141	@echo  '  tinyconfig	  - Configure the tiniest possible kernel'
142	@echo  '  testconfig	  - Run Kconfig unit tests (requires python3 and pytest)'
143
144# ===========================================================================
145# object files used by all kconfig flavours
146common-objs	:= confdata.o expr.o lexer.lex.o parser.tab.o preprocess.o \
147		   symbol.o
148
149$(obj)/lexer.lex.o: $(obj)/parser.tab.h
150HOSTCFLAGS_lexer.lex.o	:= -I $(srctree)/$(src)
151HOSTCFLAGS_parser.tab.o	:= -I $(srctree)/$(src)
152
153# conf: Used for defconfig, oldconfig and related targets
154hostprogs-y	+= conf
155conf-objs	:= conf.o $(common-objs)
156
157# nconf: Used for the nconfig target based on ncurses
158hostprogs-y	+= nconf
159nconf-objs	:= nconf.o nconf.gui.o $(common-objs)
160
161HOSTLDLIBS_nconf	= $(shell . $(obj)/nconf-cfg && echo $$libs)
162HOSTCFLAGS_nconf.o	= $(shell . $(obj)/nconf-cfg && echo $$cflags)
163HOSTCFLAGS_nconf.gui.o	= $(shell . $(obj)/nconf-cfg && echo $$cflags)
164
165$(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
166
167# mconf: Used for the menuconfig target based on lxdialog
168hostprogs-y	+= mconf
169lxdialog	:= $(addprefix lxdialog/, \
170		     checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
171mconf-objs	:= mconf.o $(lxdialog) $(common-objs)
172
173HOSTLDLIBS_mconf = $(shell . $(obj)/mconf-cfg && echo $$libs)
174$(foreach f, mconf.o $(lxdialog), \
175  $(eval HOSTCFLAGS_$f = $$(shell . $(obj)/mconf-cfg && echo $$$$cflags)))
176
177$(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
178
179# qconf: Used for the xconfig target based on Qt
180hostprogs-y	+= qconf
181qconf-cxxobjs	:= qconf.o
182qconf-objs	:= images.o $(common-objs)
183
184HOSTLDLIBS_qconf	= $(shell . $(obj)/qconf-cfg && echo $$libs)
185HOSTCXXFLAGS_qconf.o	= $(shell . $(obj)/qconf-cfg && echo $$cflags)
186
187$(obj)/qconf.o: $(obj)/qconf-cfg $(obj)/qconf.moc
188
189quiet_cmd_moc = MOC     $@
190      cmd_moc = $(shell . $(obj)/qconf-cfg && echo $$moc) -i $< -o $@
191
192$(obj)/%.moc: $(src)/%.h $(obj)/qconf-cfg
193	$(call cmd,moc)
194
195# gconf: Used for the gconfig target based on GTK+
196hostprogs-y	+= gconf
197gconf-objs	:= gconf.o images.o $(common-objs)
198
199HOSTLDLIBS_gconf    = $(shell . $(obj)/gconf-cfg && echo $$libs)
200HOSTCFLAGS_gconf.o  = $(shell . $(obj)/gconf-cfg && echo $$cflags)
201
202$(obj)/gconf.o: $(obj)/gconf-cfg
203
204# check if necessary packages are available, and configure build flags
205filechk_conf_cfg = $(CONFIG_SHELL) $<
206
207$(obj)/%conf-cfg: $(src)/%conf-cfg.sh FORCE
208	$(call filechk,conf_cfg)
209
210clean-files += *conf-cfg
211