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 := $(KBUILD_KCONFIG)
8else
9Kconfig := Kconfig
10endif
11
12ifeq ($(quiet),silent_)
13silent := -s
14endif
15
16# We need this, in case the user has it in its environment
17unexport CONFIG_
18
19config-prog := conf
20menuconfig-prog := mconf
21nconfig-prog := nconf
22gconfig-prog := gconf
23xconfig-prog := qconf
24
25define config_rule
26PHONY += $(1)
27$(1): $(obj)/$($(1)-prog)
28 $(Q)$$< $(silent) $(Kconfig)
29
30PHONY += build_$(1)
31build_$(1): $(obj)/$($(1)-prog)
32endef
33
34$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
35
36PHONY += localmodconfig localyesconfig
37localyesconfig localmodconfig: $(obj)/conf
38 $(Q)$(PERL) $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
39 $(Q)if [ -f .config ]; then \
40 cmp -s .tmp.config .config || \
41 (mv -f .config .config.old.1; \
42 mv -f .tmp.config .config; \
43 $< $(silent) --oldconfig $(Kconfig); \
44 mv -f .config.old.1 .config.old) \
45 else \
46 mv -f .tmp.config .config; \
47 $< $(silent) --oldconfig $(Kconfig); \
48 fi
49 $(Q)rm -f .tmp.config
50
51# These targets map 1:1 to the commandline options of 'conf'
52#
53# Note:
54# syncconfig has become an internal implementation detail and is now
55# deprecated for external use
56simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
57 alldefconfig randconfig listnewconfig olddefconfig syncconfig \
58 helpnewconfig yes2modconfig mod2yesconfig
59
60PHONY += $(simple-targets)
61
62$(simple-targets): $(obj)/conf
63 $(Q)$< $(silent) --$@ $(Kconfig)
64
65PHONY += savedefconfig defconfig
66
67savedefconfig: $(obj)/conf
68 $(Q)$< $(silent) --$@=defconfig $(Kconfig)
69
70defconfig: $(obj)/conf
71ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
72 @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
73 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
74else
75 @$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
76 $(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
77endif
78
79%_defconfig: $(obj)/conf
80 $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
81
82configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
83
84%.config: $(obj)/conf
85 $(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
86 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
87 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
88
89PHONY += tinyconfig
90tinyconfig:
91 $(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
92
93# CHECK: -o cache_dir=<path> working?
94PHONY += testconfig
95testconfig: $(obj)/conf
96 $(Q)$(PYTHON3) -B -m pytest $(srctree)/$(src)/tests \
97 -o cache_dir=$(abspath $(obj)/tests/.cache) \
98 $(if $(findstring 1,$(KBUILD_VERBOSE)),--capture=no)
99clean-files += tests/.cache
100
101# Help text used by make help
102help:
103 @echo ' config - Update current config utilising a line-oriented program'
104 @echo ' nconfig - Update current config utilising a ncurses menu based program'
105 @echo ' menuconfig - Update current config utilising a menu based program'
106 @echo ' xconfig - Update current config utilising a Qt based front-end'
107 @echo ' gconfig - Update current config utilising a GTK+ based front-end'
108 @echo ' oldconfig - Update current config utilising a provided .config as base'
109 @echo ' localmodconfig - Update current config disabling modules not loaded'
110 @echo ' except those preserved by LMC_KEEP environment variable'
111 @echo ' localyesconfig - Update current config converting local mods to core'
112 @echo ' except those preserved by LMC_KEEP environment variable'
113 @echo ' defconfig - New config with default from ARCH supplied defconfig'
114 @echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
115 @echo ' allnoconfig - New config where all options are answered with no'
116 @echo ' allyesconfig - New config where all options are accepted with yes'
117 @echo ' allmodconfig - New config selecting modules when possible'
118 @echo ' alldefconfig - New config with all symbols set to default'
119 @echo ' randconfig - New config with random answer to all options'
120 @echo ' yes2modconfig - Change answers from yes to mod if possible'
121 @echo ' mod2yesconfig - Change answers from mod to yes if possible'
122 @echo ' listnewconfig - List new options'
123 @echo ' helpnewconfig - List new options and help text'
124 @echo ' olddefconfig - Same as oldconfig but sets new symbols to their'
125 @echo ' default value without prompting'
126 @echo ' tinyconfig - Configure the tiniest possible kernel'
127 @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
128
129# ===========================================================================
130# object files used by all kconfig flavours
131common-objs := confdata.o expr.o lexer.lex.o parser.tab.o preprocess.o \
132 symbol.o util.o
133
134$(obj)/lexer.lex.o: $(obj)/parser.tab.h
135HOSTCFLAGS_lexer.lex.o := -I $(srctree)/$(src)
136HOSTCFLAGS_parser.tab.o := -I $(srctree)/$(src)
137
138# conf: Used for defconfig, oldconfig and related targets
139hostprogs += conf
140conf-objs := conf.o $(common-objs)
141
142# nconf: Used for the nconfig target based on ncurses
143hostprogs += nconf
144nconf-objs := nconf.o nconf.gui.o $(common-objs)
145
146HOSTLDLIBS_nconf = $(shell . $(obj)/nconf-cfg && echo $$libs)
147HOSTCFLAGS_nconf.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
148HOSTCFLAGS_nconf.gui.o = $(shell . $(obj)/nconf-cfg && echo $$cflags)
149
150$(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
151
152# mconf: Used for the menuconfig target based on lxdialog
153hostprogs += mconf
154lxdialog := $(addprefix lxdialog/, \
155 checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
156mconf-objs := mconf.o $(lxdialog) $(common-objs)
157
158HOSTLDLIBS_mconf = $(shell . $(obj)/mconf-cfg && echo $$libs)
159$(foreach f, mconf.o $(lxdialog), \
160 $(eval HOSTCFLAGS_$f = $$(shell . $(obj)/mconf-cfg && echo $$$$cflags)))
161
162$(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
163
164# qconf: Used for the xconfig target based on Qt
165hostprogs += qconf
166qconf-cxxobjs := qconf.o qconf-moc.o
167qconf-objs := images.o $(common-objs)
168
169HOSTLDLIBS_qconf = $(shell . $(obj)/qconf-cfg && echo $$libs)
170HOSTCXXFLAGS_qconf.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
171HOSTCXXFLAGS_qconf-moc.o = $(shell . $(obj)/qconf-cfg && echo $$cflags)
172
173$(obj)/qconf.o: $(obj)/qconf-cfg
174
175quiet_cmd_moc = MOC $@
176 cmd_moc = $(shell . $(obj)/qconf-cfg && echo $$moc) $< -o $@
177
178$(obj)/qconf-moc.cc: $(src)/qconf.h $(obj)/qconf-cfg FORCE
179 $(call if_changed,moc)
180
181targets += qconf-moc.cc
182
183# gconf: Used for the gconfig target based on GTK+
184hostprogs += gconf
185gconf-objs := gconf.o images.o $(common-objs)
186
187HOSTLDLIBS_gconf = $(shell . $(obj)/gconf-cfg && echo $$libs)
188HOSTCFLAGS_gconf.o = $(shell . $(obj)/gconf-cfg && echo $$cflags)
189
190$(obj)/gconf.o: $(obj)/gconf-cfg
191
192# check if necessary packages are available, and configure build flags
193filechk_conf_cfg = $(CONFIG_SHELL) $<
194
195$(obj)/%conf-cfg: $(src)/%conf-cfg.sh FORCE
196 $(call filechk,conf_cfg)
197
198clean-files += *conf-cfg