Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
30# We need this, in case the user has it in its environment
31unexport CONFIG_
32
33config-prog := conf
34menuconfig-prog := mconf
35nconfig-prog := nconf
36gconfig-prog := gconf
37xconfig-prog := qconf
38
39define config_rule
40PHONY += $(1)
41$(1): $(obj)/$($(1)-prog)
42 $(Q)$$< $(silent) $(Kconfig)
43
44PHONY += build_$(1)
45build_$(1): $(obj)/$($(1)-prog)
46endef
47
48$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
49
50PHONY += localmodconfig localyesconfig
51localyesconfig 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
70simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
71 alldefconfig randconfig listnewconfig olddefconfig syncconfig \
72 helpnewconfig yes2modconfig mod2yesconfig
73
74PHONY += $(simple-targets)
75
76$(simple-targets): $(obj)/conf
77 $(Q)$< $(silent) --$@ $(Kconfig)
78
79PHONY += savedefconfig defconfig
80
81savedefconfig: $(obj)/conf
82 $(Q)$< $(silent) --$@=defconfig $(Kconfig)
83
84defconfig: $(obj)/conf
85ifneq ($(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)
88else
89 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
90 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
91endif
92
93%_defconfig: $(obj)/conf
94 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
95
96configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
97
98%.config: $(obj)/conf
99 $(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
100 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
101 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
102
103PHONY += tinyconfig
104tinyconfig:
105 $(Q)KCONFIG_ALLCONFIG=kernel/configs/tiny-base.config $(MAKE) -f $(srctree)/Makefile allnoconfig
106 $(Q)$(MAKE) -f $(srctree)/Makefile tiny.config
107
108# CHECK: -o cache_dir=<path> working?
109PHONY += testconfig
110testconfig: $(obj)/conf
111 $(Q)$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
112 -o cache_dir=$(abspath $(obj)/tests/.cache) \
113 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
114clean-files += tests/.cache
115
116# Help text used by make help
117help:
118 @echo ' config - Update current config utilising a line-oriented program'
119 @echo ' nconfig - Update current config utilising a ncurses menu based program'
120 @echo ' menuconfig - Update current config utilising a menu based program'
121 @echo ' xconfig - Update current config utilising a Qt based front-end'
122 @echo ' gconfig - Update current config utilising a GTK+ based front-end'
123 @echo ' oldconfig - Update current config utilising a provided .config as base'
124 @echo ' localmodconfig - Update current config disabling modules not loaded'
125 @echo ' except those preserved by LMC_KEEP environment variable'
126 @echo ' localyesconfig - Update current config converting local mods to core'
127 @echo ' except those preserved by LMC_KEEP environment variable'
128 @echo ' defconfig - New config with default from ARCH supplied defconfig'
129 @echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
130 @echo ' allnoconfig - New config where all options are answered with no'
131 @echo ' allyesconfig - New config where all options are accepted with yes'
132 @echo ' allmodconfig - New config selecting modules when possible'
133 @echo ' alldefconfig - New config with all symbols set to default'
134 @echo ' randconfig - New config with random answer to all options'
135 @echo ' yes2modconfig - Change answers from yes to mod if possible'
136 @echo ' mod2yesconfig - Change answers from mod to yes if possible'
137 @echo ' listnewconfig - List new options'
138 @echo ' helpnewconfig - List new options and help text'
139 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
140 @echo ' default value without prompting'
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 menu.o parser.tab.o \
147 preprocess.o symbol.o util.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 += conf
155conf-objs := conf.o $(common-objs)
156
157# nconf: Used for the nconfig target based on ncurses
158hostprogs += 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 += 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 $$$$cflags)))
176
177$(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
178
179# qconf: Used for the xconfig target based on Qt
180hostprogs += qconf
181qconf-cxxobjs := qconf.o qconf-moc.o
182qconf-objs := images.o $(common-objs)
183
184HOSTLDLIBS_qconf = $(shell . $(obj)/qconf-cfg && echo $$libs)
185HOSTCXXFLAGS_qconf.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
186HOSTCXXFLAGS_qconf-moc.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
187
188$(obj)/qconf.o: $(obj)/qconf-cfg
189
190quiet_cmd_moc = MOC $@
191 cmd_moc = $(shell . $(obj)/qconf-cfg && echo $$moc) $< -o $@
192
193$(obj)/qconf-moc.cc: $(src)/qconf.h $(obj)/qconf-cfg FORCE
194 $(call if_changed,moc)
195
196targets += qconf-moc.cc
197
198# gconf: Used for the gconfig target based on GTK+
199hostprogs += gconf
200gconf-objs := gconf.o images.o $(common-objs)
201
202HOSTLDLIBS_gconf = $(shell . $(obj)/gconf-cfg && echo $$libs)
203HOSTCFLAGS_gconf.o = $(shell . $(obj)/gconf-cfg && echo $$cflags)
204
205$(obj)/gconf.o: $(obj)/gconf-cfg
206
207# check if necessary packages are available, and configure build flags
208filechk_conf_cfg = $(CONFIG_SHELL) $<
209
210$(obj)/%conf-cfg: $(src)/%conf-cfg.sh FORCE
211 $(call filechk,conf_cfg)
212
213clean-files += *conf-cfg