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 := $(KBUILD_KCONFIG)
11else
12Kconfig := Kconfig
13endif
14
15ifeq ($(quiet),silent_)
16silent := -s
17endif
18
19# We need this, in case the user has it in its environment
20unexport CONFIG_
21
22xconfig: $(obj)/qconf
23	$< $(silent) $(Kconfig)
24
25gconfig: $(obj)/gconf
26	$< $(silent) $(Kconfig)
27
28menuconfig: $(obj)/mconf
29	$< $(silent) $(Kconfig)
30
31config: $(obj)/conf
32	$< $(silent) --oldaskconfig $(Kconfig)
33
34nconfig: $(obj)/nconf
35	$< $(silent) $(Kconfig)
36
37build_menuconfig: $(obj)/mconf
38
39build_nconfig: $(obj)/nconf
40
41build_gconfig: $(obj)/gconf
42
43build_xconfig: $(obj)/qconf
44
45localyesconfig localmodconfig: $(obj)/conf
46	$(Q)perl $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
47	$(Q)if [ -f .config ]; then 					\
48			cmp -s .tmp.config .config ||			\
49			(mv -f .config .config.old.1;			\
50			 mv -f .tmp.config .config;			\
51			 $< $(silent) --oldconfig $(Kconfig);		\
52			 mv -f .config.old.1 .config.old)		\
53	else								\
54			mv -f .tmp.config .config;			\
55			$< $(silent) --oldconfig $(Kconfig);		\
56	fi
57	$(Q)rm -f .tmp.config
58
59# These targets map 1:1 to the commandline options of 'conf'
60#
61# Note:
62#  syncconfig has become an internal implementation detail and is now
63#  deprecated for external use
64simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
65	alldefconfig randconfig listnewconfig olddefconfig syncconfig
66PHONY += $(simple-targets)
67
68$(simple-targets): $(obj)/conf
69	$< $(silent) --$@ $(Kconfig)
70
71PHONY += oldnoconfig silentoldconfig savedefconfig defconfig
72
73# oldnoconfig is an alias of olddefconfig, because people already are dependent
74# on its behavior (sets new symbols to their default value but not 'n') with the
75# counter-intuitive name.
76oldnoconfig: olddefconfig
77	@echo "  WARNING: \"oldnoconfig\" target will be removed after Linux 4.19"
78	@echo "            Please use \"olddefconfig\" instead, which is an alias."
79
80# We do not expect manual invokcation of "silentoldcofig" (or "syncconfig").
81silentoldconfig: syncconfig
82	@echo "  WARNING: \"silentoldconfig\" has been renamed to \"syncconfig\""
83	@echo "            and is now an internal implementation detail."
84	@echo "            What you want is probably \"oldconfig\"."
85	@echo "            \"silentoldconfig\" will be removed after Linux 4.19"
86
87savedefconfig: $(obj)/conf
88	$< $(silent) --$@=defconfig $(Kconfig)
89
90defconfig: $(obj)/conf
91ifeq ($(KBUILD_DEFCONFIG),)
92	$< $(silent) --defconfig $(Kconfig)
93else
94ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
95	@$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
96	$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
97else
98	@$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
99	$(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
100endif
101endif
102
103%_defconfig: $(obj)/conf
104	$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
105
106configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
107
108%.config: $(obj)/conf
109	$(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
110	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
111	+$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
112
113PHONY += kvmconfig
114kvmconfig: kvm_guest.config
115	@:
116
117PHONY += xenconfig
118xenconfig: xen.config
119	@:
120
121PHONY += tinyconfig
122tinyconfig:
123	$(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
124
125# CHECK: -o cache_dir=<path> working?
126PHONY += testconfig
127testconfig: $(obj)/conf
128	$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
129	-o cache_dir=$(abspath $(obj)/tests/.cache) \
130	$(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
131clean-dirs += tests/.cache
132
133# Help text used by make help
134help:
135	@echo  '  config	  - Update current config utilising a line-oriented program'
136	@echo  '  nconfig         - Update current config utilising a ncurses menu based program'
137	@echo  '  menuconfig	  - Update current config utilising a menu based program'
138	@echo  '  xconfig	  - Update current config utilising a Qt based front-end'
139	@echo  '  gconfig	  - Update current config utilising a GTK+ based front-end'
140	@echo  '  oldconfig	  - Update current config utilising a provided .config as base'
141	@echo  '  localmodconfig  - Update current config disabling modules not loaded'
142	@echo  '  localyesconfig  - Update current config converting local mods to core'
143	@echo  '  defconfig	  - New config with default from ARCH supplied defconfig'
144	@echo  '  savedefconfig   - Save current config as ./defconfig (minimal config)'
145	@echo  '  allnoconfig	  - New config where all options are answered with no'
146	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
147	@echo  '  allmodconfig	  - New config selecting modules when possible'
148	@echo  '  alldefconfig    - New config with all symbols set to default'
149	@echo  '  randconfig	  - New config with random answer to all options'
150	@echo  '  listnewconfig   - List new options'
151	@echo  '  olddefconfig	  - Same as oldconfig but sets new symbols to their'
152	@echo  '                    default value without prompting'
153	@echo  '  kvmconfig	  - Enable additional options for kvm guest kernel support'
154	@echo  '  xenconfig       - Enable additional options for xen dom0 and guest kernel support'
155	@echo  '  tinyconfig	  - Configure the tiniest possible kernel'
156	@echo  '  testconfig	  - Run Kconfig unit tests (requires python3 and pytest)'
157
158# ===========================================================================
159# Shared Makefile for the various kconfig executables:
160# conf:	  Used for defconfig, oldconfig and related targets
161# object files used by all kconfig flavours
162
163conf-objs	:= conf.o  zconf.tab.o
164
165hostprogs-y := conf
166
167targets		+= zconf.lex.c
168
169# generated files seem to need this to find local include files
170HOSTCFLAGS_zconf.lex.o	:= -I$(src)
171HOSTCFLAGS_zconf.tab.o	:= -I$(src)
172
173# nconf: Used for the nconfig target based on ncurses
174hostprogs-y	+= nconf
175nconf-objs	:= nconf.o zconf.tab.o nconf.gui.o
176
177HOSTLDLIBS_nconf	= $(shell . $(obj)/.nconf-cfg && echo $$libs)
178HOSTCFLAGS_nconf.o	= $(shell . $(obj)/.nconf-cfg && echo $$cflags)
179HOSTCFLAGS_nconf.gui.o	= $(shell . $(obj)/.nconf-cfg && echo $$cflags)
180
181$(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/.nconf-cfg
182
183# mconf: Used for the menuconfig target based on lxdialog
184hostprogs-y	+= mconf
185lxdialog	:= checklist.o inputbox.o menubox.o textbox.o util.o yesno.o
186mconf-objs	:= mconf.o zconf.tab.o $(addprefix lxdialog/, $(lxdialog))
187
188HOSTLDLIBS_mconf = $(shell . $(obj)/.mconf-cfg && echo $$libs)
189$(foreach f, mconf.o $(lxdialog), \
190  $(eval HOSTCFLAGS_$f = $$(shell . $(obj)/.mconf-cfg && echo $$$$cflags)))
191
192$(obj)/mconf.o: $(obj)/.mconf-cfg
193$(addprefix $(obj)/lxdialog/, $(lxdialog)): $(obj)/.mconf-cfg
194
195# qconf: Used for the xconfig target based on Qt
196hostprogs-y	+= qconf
197qconf-cxxobjs	:= qconf.o
198qconf-objs	:= zconf.tab.o
199
200HOSTLDLIBS_qconf	= $(shell . $(obj)/.qconf-cfg && echo $$libs)
201HOSTCXXFLAGS_qconf.o	= $(shell . $(obj)/.qconf-cfg && echo $$cflags)
202
203$(obj)/qconf.o: $(obj)/.qconf-cfg $(obj)/qconf.moc
204
205quiet_cmd_moc = MOC     $@
206      cmd_moc = $(shell . $(obj)/.qconf-cfg && echo $$moc) -i $< -o $@
207
208$(obj)/%.moc: $(src)/%.h $(obj)/.qconf-cfg
209	$(call cmd,moc)
210
211# gconf: Used for the gconfig target based on GTK+
212hostprogs-y	+= gconf
213gconf-objs	:= gconf.o zconf.tab.o
214
215HOSTLDLIBS_gconf    = $(shell . $(obj)/.gconf-cfg && echo $$libs)
216HOSTCFLAGS_gconf.o  = $(shell . $(obj)/.gconf-cfg && echo $$cflags)
217
218$(obj)/gconf.o: $(obj)/.gconf-cfg
219
220$(obj)/zconf.tab.o: $(obj)/zconf.lex.c
221
222# check if necessary packages are available, and configure build flags
223define filechk_conf_cfg
224	$(CONFIG_SHELL) $<
225endef
226
227$(obj)/.%conf-cfg: $(src)/%conf-cfg.sh FORCE
228	$(call filechk,conf_cfg)
229
230clean-files += .*conf-cfg
231