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 mod2noconfig
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 ' mod2noconfig - Change answers from mod to no if possible'
138 @echo ' listnewconfig - List new options'
139 @echo ' helpnewconfig - List new options and help text'
140 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
141 @echo ' default value without prompting'
142 @echo ' tinyconfig - Configure the tiniest possible kernel'
143 @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
144
145# ===========================================================================
146# object files used by all kconfig flavours
147common-objs := confdata.o expr.o lexer.lex.o menu.o parser.tab.o \
148 preprocess.o symbol.o util.o
149
150$(obj)/lexer.lex.o: $(obj)/parser.tab.h
151HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src)
152HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src)
153
154# conf: Used for defconfig, oldconfig and related targets
155hostprogs += conf
156conf-objs := conf.o $(common-objs)
157
158# nconf: Used for the nconfig target based on ncurses
159hostprogs += nconf
160nconf-objs := nconf.o nconf.gui.o $(common-objs)
161
162HOSTLDLIBS_nconf = $(shell . $(obj)/nconf-cfg && echo $$libs)
163HOSTCFLAGS_nconf.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
164HOSTCFLAGS_nconf.gui.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
165
166$(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
167
168# mconf: Used for the menuconfig target based on lxdialog
169hostprogs += mconf
170lxdialog := $(addprefix lxdialog/, \
171 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
172mconf-objs := mconf.o $(lxdialog) $(common-objs)
173
174HOSTLDLIBS_mconf = $(shell . $(obj)/mconf-cfg && echo $$libs)
175$(foreach f, mconf.o $(lxdialog), \
176 $(eval HOSTCFLAGS_$f = $$(shell . $(obj)/mconf-cfg && echo $$$$cflags)))
177
178$(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
179
180# qconf: Used for the xconfig target based on Qt
181hostprogs += qconf
182qconf-cxxobjs := qconf.o qconf-moc.o
183qconf-objs := images.o $(common-objs)
184
185HOSTLDLIBS_qconf = $(shell . $(obj)/qconf-cfg && echo $$libs)
186HOSTCXXFLAGS_qconf.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
187HOSTCXXFLAGS_qconf-moc.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
188
189$(obj)/qconf.o: $(obj)/qconf-cfg
190
191quiet_cmd_moc = MOC $@
192 cmd_moc = $(shell . $(obj)/qconf-cfg && echo $$moc) $< -o $@
193
194$(obj)/qconf-moc.cc: $(src)/qconf.h $(obj)/qconf-cfg FORCE
195 $(call if_changed,moc)
196
197targets += qconf-moc.cc
198
199# gconf: Used for the gconfig target based on GTK+
200hostprogs += gconf
201gconf-objs := gconf.o images.o $(common-objs)
202
203HOSTLDLIBS_gconf = $(shell . $(obj)/gconf-cfg && echo $$libs)
204HOSTCFLAGS_gconf.o = $(shell . $(obj)/gconf-cfg && echo $$cflags)
205
206$(obj)/gconf.o: $(obj)/gconf-cfg
207
208# check if necessary packages are available, and configure build flags
209filechk_conf_cfg = $(CONFIG_SHELL) $<
210
211$(obj)/%conf-cfg: $(src)/%conf-cfg.sh FORCE
212 $(call filechk,conf_cfg)
213
214clean-files += *conf-cfg