Commit c517d838eb7d07bbe9507871fab3931deccff539

Authored by Linus Torvalds
1 parent feaf222925

Linux 4.0-rc1

.. after extensive statistical analysis of my G+ polling, I've come to
the inescapable conclusion that internet polls are bad.

Big surprise.

But "Hurr durr I'ma sheep" trounced "I like online polls" by a 62-to-38%
margin, in a poll that people weren't even supposed to participate in.
Who can argue with solid numbers like that? 5,796 votes from people who
can't even follow the most basic directions?

In contrast, "v4.0" beat out "v3.20" by a slimmer margin of 56-to-44%,
but with a total of 29,110 votes right now.

Now, arguably, that vote spread is only about 3,200 votes, which is less
than the almost six thousand votes that the "please ignore" poll got, so
it could be considered noise.

But hey, I asked, so I'll honor the votes.

Showing 1 changed file with 4 additions and 4 deletions Inline Diff

1 VERSION = 3 1 VERSION = 4
2 PATCHLEVEL = 19 2 PATCHLEVEL = 0
3 SUBLEVEL = 0 3 SUBLEVEL = 0
4 EXTRAVERSION = 4 EXTRAVERSION = -rc1
5 NAME = Diseased Newt 5 NAME = Hurr durr I'ma sheep
6 6
7 # *DOCUMENTATION* 7 # *DOCUMENTATION*
8 # To see a list of typical targets execute "make help" 8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README 9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not 10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file. 11 # expect to learn how to build the kernel reading this file.
12 12
13 # Do not use make's built-in rules and variables 13 # Do not use make's built-in rules and variables
14 # (this increases performance and avoids hard-to-debug behaviour); 14 # (this increases performance and avoids hard-to-debug behaviour);
15 MAKEFLAGS += -rR 15 MAKEFLAGS += -rR
16 16
17 # Avoid funny character set dependencies 17 # Avoid funny character set dependencies
18 unexport LC_ALL 18 unexport LC_ALL
19 LC_COLLATE=C 19 LC_COLLATE=C
20 LC_NUMERIC=C 20 LC_NUMERIC=C
21 export LC_COLLATE LC_NUMERIC 21 export LC_COLLATE LC_NUMERIC
22 22
23 # Avoid interference with shell env settings 23 # Avoid interference with shell env settings
24 unexport GREP_OPTIONS 24 unexport GREP_OPTIONS
25 25
26 # We are using a recursive build, so we need to do a little thinking 26 # We are using a recursive build, so we need to do a little thinking
27 # to get the ordering right. 27 # to get the ordering right.
28 # 28 #
29 # Most importantly: sub-Makefiles should only ever modify files in 29 # Most importantly: sub-Makefiles should only ever modify files in
30 # their own directory. If in some directory we have a dependency on 30 # their own directory. If in some directory we have a dependency on
31 # a file in another dir (which doesn't happen often, but it's often 31 # a file in another dir (which doesn't happen often, but it's often
32 # unavoidable when linking the built-in.o targets which finally 32 # unavoidable when linking the built-in.o targets which finally
33 # turn into vmlinux), we will call a sub make in that other dir, and 33 # turn into vmlinux), we will call a sub make in that other dir, and
34 # after that we are sure that everything which is in that other dir 34 # after that we are sure that everything which is in that other dir
35 # is now up to date. 35 # is now up to date.
36 # 36 #
37 # The only cases where we need to modify files which have global 37 # The only cases where we need to modify files which have global
38 # effects are thus separated out and done before the recursive 38 # effects are thus separated out and done before the recursive
39 # descending is started. They are now explicitly listed as the 39 # descending is started. They are now explicitly listed as the
40 # prepare rule. 40 # prepare rule.
41 41
42 # Beautify output 42 # Beautify output
43 # --------------------------------------------------------------------------- 43 # ---------------------------------------------------------------------------
44 # 44 #
45 # Normally, we echo the whole command before executing it. By making 45 # Normally, we echo the whole command before executing it. By making
46 # that echo $($(quiet)$(cmd)), we now have the possibility to set 46 # that echo $($(quiet)$(cmd)), we now have the possibility to set
47 # $(quiet) to choose other forms of output instead, e.g. 47 # $(quiet) to choose other forms of output instead, e.g.
48 # 48 #
49 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 49 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
50 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 50 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
51 # 51 #
52 # If $(quiet) is empty, the whole command will be printed. 52 # If $(quiet) is empty, the whole command will be printed.
53 # If it is set to "quiet_", only the short version will be printed. 53 # If it is set to "quiet_", only the short version will be printed.
54 # If it is set to "silent_", nothing will be printed at all, since 54 # If it is set to "silent_", nothing will be printed at all, since
55 # the variable $(silent_cmd_cc_o_c) doesn't exist. 55 # the variable $(silent_cmd_cc_o_c) doesn't exist.
56 # 56 #
57 # A simple variant is to prefix commands with $(Q) - that's useful 57 # A simple variant is to prefix commands with $(Q) - that's useful
58 # for commands that shall be hidden in non-verbose mode. 58 # for commands that shall be hidden in non-verbose mode.
59 # 59 #
60 # $(Q)ln $@ :< 60 # $(Q)ln $@ :<
61 # 61 #
62 # If KBUILD_VERBOSE equals 0 then the above command will be hidden. 62 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
63 # If KBUILD_VERBOSE equals 1 then the above command is displayed. 63 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
64 # 64 #
65 # To put more focus on warnings, be less verbose as default 65 # To put more focus on warnings, be less verbose as default
66 # Use 'make V=1' to see the full commands 66 # Use 'make V=1' to see the full commands
67 67
68 ifeq ("$(origin V)", "command line") 68 ifeq ("$(origin V)", "command line")
69 KBUILD_VERBOSE = $(V) 69 KBUILD_VERBOSE = $(V)
70 endif 70 endif
71 ifndef KBUILD_VERBOSE 71 ifndef KBUILD_VERBOSE
72 KBUILD_VERBOSE = 0 72 KBUILD_VERBOSE = 0
73 endif 73 endif
74 74
75 ifeq ($(KBUILD_VERBOSE),1) 75 ifeq ($(KBUILD_VERBOSE),1)
76 quiet = 76 quiet =
77 Q = 77 Q =
78 else 78 else
79 quiet=quiet_ 79 quiet=quiet_
80 Q = @ 80 Q = @
81 endif 81 endif
82 82
83 # If the user is running make -s (silent mode), suppress echoing of 83 # If the user is running make -s (silent mode), suppress echoing of
84 # commands 84 # commands
85 85
86 ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 86 ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
87 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) 87 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
88 quiet=silent_ 88 quiet=silent_
89 endif 89 endif
90 else # make-3.8x 90 else # make-3.8x
91 ifneq ($(filter s% -s%,$(MAKEFLAGS)),) 91 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
92 quiet=silent_ 92 quiet=silent_
93 endif 93 endif
94 endif 94 endif
95 95
96 export quiet Q KBUILD_VERBOSE 96 export quiet Q KBUILD_VERBOSE
97 97
98 # kbuild supports saving output files in a separate directory. 98 # kbuild supports saving output files in a separate directory.
99 # To locate output files in a separate directory two syntaxes are supported. 99 # To locate output files in a separate directory two syntaxes are supported.
100 # In both cases the working directory must be the root of the kernel src. 100 # In both cases the working directory must be the root of the kernel src.
101 # 1) O= 101 # 1) O=
102 # Use "make O=dir/to/store/output/files/" 102 # Use "make O=dir/to/store/output/files/"
103 # 103 #
104 # 2) Set KBUILD_OUTPUT 104 # 2) Set KBUILD_OUTPUT
105 # Set the environment variable KBUILD_OUTPUT to point to the directory 105 # Set the environment variable KBUILD_OUTPUT to point to the directory
106 # where the output files shall be placed. 106 # where the output files shall be placed.
107 # export KBUILD_OUTPUT=dir/to/store/output/files/ 107 # export KBUILD_OUTPUT=dir/to/store/output/files/
108 # make 108 # make
109 # 109 #
110 # The O= assignment takes precedence over the KBUILD_OUTPUT environment 110 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
111 # variable. 111 # variable.
112 112
113 # KBUILD_SRC is set on invocation of make in OBJ directory 113 # KBUILD_SRC is set on invocation of make in OBJ directory
114 # KBUILD_SRC is not intended to be used by the regular user (for now) 114 # KBUILD_SRC is not intended to be used by the regular user (for now)
115 ifeq ($(KBUILD_SRC),) 115 ifeq ($(KBUILD_SRC),)
116 116
117 # OK, Make called in directory where kernel src resides 117 # OK, Make called in directory where kernel src resides
118 # Do we want to locate output files in a separate directory? 118 # Do we want to locate output files in a separate directory?
119 ifeq ("$(origin O)", "command line") 119 ifeq ("$(origin O)", "command line")
120 KBUILD_OUTPUT := $(O) 120 KBUILD_OUTPUT := $(O)
121 endif 121 endif
122 122
123 # That's our default target when none is given on the command line 123 # That's our default target when none is given on the command line
124 PHONY := _all 124 PHONY := _all
125 _all: 125 _all:
126 126
127 # Cancel implicit rules on top Makefile 127 # Cancel implicit rules on top Makefile
128 $(CURDIR)/Makefile Makefile: ; 128 $(CURDIR)/Makefile Makefile: ;
129 129
130 ifneq ($(KBUILD_OUTPUT),) 130 ifneq ($(KBUILD_OUTPUT),)
131 # Invoke a second make in the output directory, passing relevant variables 131 # Invoke a second make in the output directory, passing relevant variables
132 # check that the output directory actually exists 132 # check that the output directory actually exists
133 saved-output := $(KBUILD_OUTPUT) 133 saved-output := $(KBUILD_OUTPUT)
134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
135 && /bin/pwd) 135 && /bin/pwd)
136 $(if $(KBUILD_OUTPUT),, \ 136 $(if $(KBUILD_OUTPUT),, \
137 $(error failed to create output directory "$(saved-output)")) 137 $(error failed to create output directory "$(saved-output)"))
138 138
139 PHONY += $(MAKECMDGOALS) sub-make 139 PHONY += $(MAKECMDGOALS) sub-make
140 140
141 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 141 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
142 @: 142 @:
143 143
144 sub-make: FORCE 144 sub-make: FORCE
145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
147 147
148 # Leave processing to above invocation of make 148 # Leave processing to above invocation of make
149 skip-makefile := 1 149 skip-makefile := 1
150 endif # ifneq ($(KBUILD_OUTPUT),) 150 endif # ifneq ($(KBUILD_OUTPUT),)
151 endif # ifeq ($(KBUILD_SRC),) 151 endif # ifeq ($(KBUILD_SRC),)
152 152
153 # We process the rest of the Makefile if this is the final invocation of make 153 # We process the rest of the Makefile if this is the final invocation of make
154 ifeq ($(skip-makefile),) 154 ifeq ($(skip-makefile),)
155 155
156 # Do not print "Entering directory ...", 156 # Do not print "Entering directory ...",
157 # but we want to display it when entering to the output directory 157 # but we want to display it when entering to the output directory
158 # so that IDEs/editors are able to understand relative filenames. 158 # so that IDEs/editors are able to understand relative filenames.
159 MAKEFLAGS += --no-print-directory 159 MAKEFLAGS += --no-print-directory
160 160
161 # Call a source code checker (by default, "sparse") as part of the 161 # Call a source code checker (by default, "sparse") as part of the
162 # C compilation. 162 # C compilation.
163 # 163 #
164 # Use 'make C=1' to enable checking of only re-compiled files. 164 # Use 'make C=1' to enable checking of only re-compiled files.
165 # Use 'make C=2' to enable checking of *all* source files, regardless 165 # Use 'make C=2' to enable checking of *all* source files, regardless
166 # of whether they are re-compiled or not. 166 # of whether they are re-compiled or not.
167 # 167 #
168 # See the file "Documentation/sparse.txt" for more details, including 168 # See the file "Documentation/sparse.txt" for more details, including
169 # where to get the "sparse" utility. 169 # where to get the "sparse" utility.
170 170
171 ifeq ("$(origin C)", "command line") 171 ifeq ("$(origin C)", "command line")
172 KBUILD_CHECKSRC = $(C) 172 KBUILD_CHECKSRC = $(C)
173 endif 173 endif
174 ifndef KBUILD_CHECKSRC 174 ifndef KBUILD_CHECKSRC
175 KBUILD_CHECKSRC = 0 175 KBUILD_CHECKSRC = 0
176 endif 176 endif
177 177
178 # Use make M=dir to specify directory of external module to build 178 # Use make M=dir to specify directory of external module to build
179 # Old syntax make ... SUBDIRS=$PWD is still supported 179 # Old syntax make ... SUBDIRS=$PWD is still supported
180 # Setting the environment variable KBUILD_EXTMOD take precedence 180 # Setting the environment variable KBUILD_EXTMOD take precedence
181 ifdef SUBDIRS 181 ifdef SUBDIRS
182 KBUILD_EXTMOD ?= $(SUBDIRS) 182 KBUILD_EXTMOD ?= $(SUBDIRS)
183 endif 183 endif
184 184
185 ifeq ("$(origin M)", "command line") 185 ifeq ("$(origin M)", "command line")
186 KBUILD_EXTMOD := $(M) 186 KBUILD_EXTMOD := $(M)
187 endif 187 endif
188 188
189 # If building an external module we do not care about the all: rule 189 # If building an external module we do not care about the all: rule
190 # but instead _all depend on modules 190 # but instead _all depend on modules
191 PHONY += all 191 PHONY += all
192 ifeq ($(KBUILD_EXTMOD),) 192 ifeq ($(KBUILD_EXTMOD),)
193 _all: all 193 _all: all
194 else 194 else
195 _all: modules 195 _all: modules
196 endif 196 endif
197 197
198 ifeq ($(KBUILD_SRC),) 198 ifeq ($(KBUILD_SRC),)
199 # building in the source tree 199 # building in the source tree
200 srctree := . 200 srctree := .
201 else 201 else
202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
203 # building in a subdirectory of the source tree 203 # building in a subdirectory of the source tree
204 srctree := .. 204 srctree := ..
205 else 205 else
206 srctree := $(KBUILD_SRC) 206 srctree := $(KBUILD_SRC)
207 endif 207 endif
208 endif 208 endif
209 objtree := . 209 objtree := .
210 src := $(srctree) 210 src := $(srctree)
211 obj := $(objtree) 211 obj := $(objtree)
212 212
213 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 213 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
214 214
215 export srctree objtree VPATH 215 export srctree objtree VPATH
216 216
217 217
218 # SUBARCH tells the usermode build what the underlying arch is. That is set 218 # SUBARCH tells the usermode build what the underlying arch is. That is set
219 # first, and if a usermode build is happening, the "ARCH=um" on the command 219 # first, and if a usermode build is happening, the "ARCH=um" on the command
220 # line overrides the setting of ARCH below. If a native build is happening, 220 # line overrides the setting of ARCH below. If a native build is happening,
221 # then ARCH is assigned, getting whatever value it gets normally, and 221 # then ARCH is assigned, getting whatever value it gets normally, and
222 # SUBARCH is subsequently ignored. 222 # SUBARCH is subsequently ignored.
223 223
224 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 224 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
225 -e s/sun4u/sparc64/ \ 225 -e s/sun4u/sparc64/ \
226 -e s/arm.*/arm/ -e s/sa110/arm/ \ 226 -e s/arm.*/arm/ -e s/sa110/arm/ \
227 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 227 -e s/s390x/s390/ -e s/parisc64/parisc/ \
228 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 228 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
229 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 229 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
230 230
231 # Cross compiling and selecting different set of gcc/bin-utils 231 # Cross compiling and selecting different set of gcc/bin-utils
232 # --------------------------------------------------------------------------- 232 # ---------------------------------------------------------------------------
233 # 233 #
234 # When performing cross compilation for other architectures ARCH shall be set 234 # When performing cross compilation for other architectures ARCH shall be set
235 # to the target architecture. (See arch/* for the possibilities). 235 # to the target architecture. (See arch/* for the possibilities).
236 # ARCH can be set during invocation of make: 236 # ARCH can be set during invocation of make:
237 # make ARCH=ia64 237 # make ARCH=ia64
238 # Another way is to have ARCH set in the environment. 238 # Another way is to have ARCH set in the environment.
239 # The default ARCH is the host where make is executed. 239 # The default ARCH is the host where make is executed.
240 240
241 # CROSS_COMPILE specify the prefix used for all executables used 241 # CROSS_COMPILE specify the prefix used for all executables used
242 # during compilation. Only gcc and related bin-utils executables 242 # during compilation. Only gcc and related bin-utils executables
243 # are prefixed with $(CROSS_COMPILE). 243 # are prefixed with $(CROSS_COMPILE).
244 # CROSS_COMPILE can be set on the command line 244 # CROSS_COMPILE can be set on the command line
245 # make CROSS_COMPILE=ia64-linux- 245 # make CROSS_COMPILE=ia64-linux-
246 # Alternatively CROSS_COMPILE can be set in the environment. 246 # Alternatively CROSS_COMPILE can be set in the environment.
247 # A third alternative is to store a setting in .config so that plain 247 # A third alternative is to store a setting in .config so that plain
248 # "make" in the configured kernel build directory always uses that. 248 # "make" in the configured kernel build directory always uses that.
249 # Default value for CROSS_COMPILE is not to prefix executables 249 # Default value for CROSS_COMPILE is not to prefix executables
250 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 250 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
251 ARCH ?= $(SUBARCH) 251 ARCH ?= $(SUBARCH)
252 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 252 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
253 253
254 # Architecture as present in compile.h 254 # Architecture as present in compile.h
255 UTS_MACHINE := $(ARCH) 255 UTS_MACHINE := $(ARCH)
256 SRCARCH := $(ARCH) 256 SRCARCH := $(ARCH)
257 257
258 # Additional ARCH settings for x86 258 # Additional ARCH settings for x86
259 ifeq ($(ARCH),i386) 259 ifeq ($(ARCH),i386)
260 SRCARCH := x86 260 SRCARCH := x86
261 endif 261 endif
262 ifeq ($(ARCH),x86_64) 262 ifeq ($(ARCH),x86_64)
263 SRCARCH := x86 263 SRCARCH := x86
264 endif 264 endif
265 265
266 # Additional ARCH settings for sparc 266 # Additional ARCH settings for sparc
267 ifeq ($(ARCH),sparc32) 267 ifeq ($(ARCH),sparc32)
268 SRCARCH := sparc 268 SRCARCH := sparc
269 endif 269 endif
270 ifeq ($(ARCH),sparc64) 270 ifeq ($(ARCH),sparc64)
271 SRCARCH := sparc 271 SRCARCH := sparc
272 endif 272 endif
273 273
274 # Additional ARCH settings for sh 274 # Additional ARCH settings for sh
275 ifeq ($(ARCH),sh64) 275 ifeq ($(ARCH),sh64)
276 SRCARCH := sh 276 SRCARCH := sh
277 endif 277 endif
278 278
279 # Additional ARCH settings for tile 279 # Additional ARCH settings for tile
280 ifeq ($(ARCH),tilepro) 280 ifeq ($(ARCH),tilepro)
281 SRCARCH := tile 281 SRCARCH := tile
282 endif 282 endif
283 ifeq ($(ARCH),tilegx) 283 ifeq ($(ARCH),tilegx)
284 SRCARCH := tile 284 SRCARCH := tile
285 endif 285 endif
286 286
287 # Where to locate arch specific headers 287 # Where to locate arch specific headers
288 hdr-arch := $(SRCARCH) 288 hdr-arch := $(SRCARCH)
289 289
290 KCONFIG_CONFIG ?= .config 290 KCONFIG_CONFIG ?= .config
291 export KCONFIG_CONFIG 291 export KCONFIG_CONFIG
292 292
293 # SHELL used by kbuild 293 # SHELL used by kbuild
294 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 294 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
295 else if [ -x /bin/bash ]; then echo /bin/bash; \ 295 else if [ -x /bin/bash ]; then echo /bin/bash; \
296 else echo sh; fi ; fi) 296 else echo sh; fi ; fi)
297 297
298 HOSTCC = gcc 298 HOSTCC = gcc
299 HOSTCXX = g++ 299 HOSTCXX = g++
300 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 300 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
301 HOSTCXXFLAGS = -O2 301 HOSTCXXFLAGS = -O2
302 302
303 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 303 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
304 HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 304 HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
305 -Wno-missing-field-initializers -fno-delete-null-pointer-checks 305 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
306 endif 306 endif
307 307
308 # Decide whether to build built-in, modular, or both. 308 # Decide whether to build built-in, modular, or both.
309 # Normally, just do built-in. 309 # Normally, just do built-in.
310 310
311 KBUILD_MODULES := 311 KBUILD_MODULES :=
312 KBUILD_BUILTIN := 1 312 KBUILD_BUILTIN := 1
313 313
314 # If we have only "make modules", don't compile built-in objects. 314 # If we have only "make modules", don't compile built-in objects.
315 # When we're building modules with modversions, we need to consider 315 # When we're building modules with modversions, we need to consider
316 # the built-in objects during the descend as well, in order to 316 # the built-in objects during the descend as well, in order to
317 # make sure the checksums are up to date before we record them. 317 # make sure the checksums are up to date before we record them.
318 318
319 ifeq ($(MAKECMDGOALS),modules) 319 ifeq ($(MAKECMDGOALS),modules)
320 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 320 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
321 endif 321 endif
322 322
323 # If we have "make <whatever> modules", compile modules 323 # If we have "make <whatever> modules", compile modules
324 # in addition to whatever we do anyway. 324 # in addition to whatever we do anyway.
325 # Just "make" or "make all" shall build modules as well 325 # Just "make" or "make all" shall build modules as well
326 326
327 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 327 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
328 KBUILD_MODULES := 1 328 KBUILD_MODULES := 1
329 endif 329 endif
330 330
331 ifeq ($(MAKECMDGOALS),) 331 ifeq ($(MAKECMDGOALS),)
332 KBUILD_MODULES := 1 332 KBUILD_MODULES := 1
333 endif 333 endif
334 334
335 export KBUILD_MODULES KBUILD_BUILTIN 335 export KBUILD_MODULES KBUILD_BUILTIN
336 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 336 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
337 337
338 ifneq ($(CC),) 338 ifneq ($(CC),)
339 ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1) 339 ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
340 COMPILER := clang 340 COMPILER := clang
341 else 341 else
342 COMPILER := gcc 342 COMPILER := gcc
343 endif 343 endif
344 export COMPILER 344 export COMPILER
345 endif 345 endif
346 346
347 # Look for make include files relative to root of kernel src 347 # Look for make include files relative to root of kernel src
348 MAKEFLAGS += --include-dir=$(srctree) 348 MAKEFLAGS += --include-dir=$(srctree)
349 349
350 # We need some generic definitions (do not try to remake the file). 350 # We need some generic definitions (do not try to remake the file).
351 $(srctree)/scripts/Kbuild.include: ; 351 $(srctree)/scripts/Kbuild.include: ;
352 include $(srctree)/scripts/Kbuild.include 352 include $(srctree)/scripts/Kbuild.include
353 353
354 # Make variables (CC, etc...) 354 # Make variables (CC, etc...)
355 AS = $(CROSS_COMPILE)as 355 AS = $(CROSS_COMPILE)as
356 LD = $(CROSS_COMPILE)ld 356 LD = $(CROSS_COMPILE)ld
357 CC = $(CROSS_COMPILE)gcc 357 CC = $(CROSS_COMPILE)gcc
358 CPP = $(CC) -E 358 CPP = $(CC) -E
359 AR = $(CROSS_COMPILE)ar 359 AR = $(CROSS_COMPILE)ar
360 NM = $(CROSS_COMPILE)nm 360 NM = $(CROSS_COMPILE)nm
361 STRIP = $(CROSS_COMPILE)strip 361 STRIP = $(CROSS_COMPILE)strip
362 OBJCOPY = $(CROSS_COMPILE)objcopy 362 OBJCOPY = $(CROSS_COMPILE)objcopy
363 OBJDUMP = $(CROSS_COMPILE)objdump 363 OBJDUMP = $(CROSS_COMPILE)objdump
364 AWK = awk 364 AWK = awk
365 GENKSYMS = scripts/genksyms/genksyms 365 GENKSYMS = scripts/genksyms/genksyms
366 INSTALLKERNEL := installkernel 366 INSTALLKERNEL := installkernel
367 DEPMOD = /sbin/depmod 367 DEPMOD = /sbin/depmod
368 PERL = perl 368 PERL = perl
369 PYTHON = python 369 PYTHON = python
370 CHECK = sparse 370 CHECK = sparse
371 371
372 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 372 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
373 -Wbitwise -Wno-return-void $(CF) 373 -Wbitwise -Wno-return-void $(CF)
374 CFLAGS_MODULE = 374 CFLAGS_MODULE =
375 AFLAGS_MODULE = 375 AFLAGS_MODULE =
376 LDFLAGS_MODULE = 376 LDFLAGS_MODULE =
377 CFLAGS_KERNEL = 377 CFLAGS_KERNEL =
378 AFLAGS_KERNEL = 378 AFLAGS_KERNEL =
379 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 379 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
380 380
381 381
382 # Use USERINCLUDE when you must reference the UAPI directories only. 382 # Use USERINCLUDE when you must reference the UAPI directories only.
383 USERINCLUDE := \ 383 USERINCLUDE := \
384 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 384 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
385 -Iarch/$(hdr-arch)/include/generated/uapi \ 385 -Iarch/$(hdr-arch)/include/generated/uapi \
386 -I$(srctree)/include/uapi \ 386 -I$(srctree)/include/uapi \
387 -Iinclude/generated/uapi \ 387 -Iinclude/generated/uapi \
388 -include $(srctree)/include/linux/kconfig.h 388 -include $(srctree)/include/linux/kconfig.h
389 389
390 # Use LINUXINCLUDE when you must reference the include/ directory. 390 # Use LINUXINCLUDE when you must reference the include/ directory.
391 # Needed to be compatible with the O= option 391 # Needed to be compatible with the O= option
392 LINUXINCLUDE := \ 392 LINUXINCLUDE := \
393 -I$(srctree)/arch/$(hdr-arch)/include \ 393 -I$(srctree)/arch/$(hdr-arch)/include \
394 -Iarch/$(hdr-arch)/include/generated/uapi \ 394 -Iarch/$(hdr-arch)/include/generated/uapi \
395 -Iarch/$(hdr-arch)/include/generated \ 395 -Iarch/$(hdr-arch)/include/generated \
396 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 396 $(if $(KBUILD_SRC), -I$(srctree)/include) \
397 -Iinclude \ 397 -Iinclude \
398 $(USERINCLUDE) 398 $(USERINCLUDE)
399 399
400 KBUILD_CPPFLAGS := -D__KERNEL__ 400 KBUILD_CPPFLAGS := -D__KERNEL__
401 401
402 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 402 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
403 -fno-strict-aliasing -fno-common \ 403 -fno-strict-aliasing -fno-common \
404 -Werror-implicit-function-declaration \ 404 -Werror-implicit-function-declaration \
405 -Wno-format-security \ 405 -Wno-format-security \
406 -std=gnu89 406 -std=gnu89
407 407
408 KBUILD_AFLAGS_KERNEL := 408 KBUILD_AFLAGS_KERNEL :=
409 KBUILD_CFLAGS_KERNEL := 409 KBUILD_CFLAGS_KERNEL :=
410 KBUILD_AFLAGS := -D__ASSEMBLY__ 410 KBUILD_AFLAGS := -D__ASSEMBLY__
411 KBUILD_AFLAGS_MODULE := -DMODULE 411 KBUILD_AFLAGS_MODULE := -DMODULE
412 KBUILD_CFLAGS_MODULE := -DMODULE 412 KBUILD_CFLAGS_MODULE := -DMODULE
413 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 413 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
414 414
415 # Read KERNELRELEASE from include/config/kernel.release (if it exists) 415 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
416 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 416 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
417 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 417 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
418 418
419 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 419 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
420 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 420 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
421 export CPP AR NM STRIP OBJCOPY OBJDUMP 421 export CPP AR NM STRIP OBJCOPY OBJDUMP
422 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 422 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
423 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 423 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
424 424
425 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 425 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
426 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN 426 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN
427 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 427 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
428 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 428 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
429 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 429 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
430 export KBUILD_ARFLAGS 430 export KBUILD_ARFLAGS
431 431
432 # When compiling out-of-tree modules, put MODVERDIR in the module 432 # When compiling out-of-tree modules, put MODVERDIR in the module
433 # tree rather than in the kernel tree. The kernel tree might 433 # tree rather than in the kernel tree. The kernel tree might
434 # even be read-only. 434 # even be read-only.
435 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 435 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
436 436
437 # Files to ignore in find ... statements 437 # Files to ignore in find ... statements
438 438
439 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 439 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
440 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 440 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
441 -prune -o 441 -prune -o
442 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 442 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
443 --exclude CVS --exclude .pc --exclude .hg --exclude .git 443 --exclude CVS --exclude .pc --exclude .hg --exclude .git
444 444
445 # =========================================================================== 445 # ===========================================================================
446 # Rules shared between *config targets and build targets 446 # Rules shared between *config targets and build targets
447 447
448 # Basic helpers built in scripts/ 448 # Basic helpers built in scripts/
449 PHONY += scripts_basic 449 PHONY += scripts_basic
450 scripts_basic: 450 scripts_basic:
451 $(Q)$(MAKE) $(build)=scripts/basic 451 $(Q)$(MAKE) $(build)=scripts/basic
452 $(Q)rm -f .tmp_quiet_recordmcount 452 $(Q)rm -f .tmp_quiet_recordmcount
453 453
454 # To avoid any implicit rule to kick in, define an empty command. 454 # To avoid any implicit rule to kick in, define an empty command.
455 scripts/basic/%: scripts_basic ; 455 scripts/basic/%: scripts_basic ;
456 456
457 PHONY += outputmakefile 457 PHONY += outputmakefile
458 # outputmakefile generates a Makefile in the output directory, if using a 458 # outputmakefile generates a Makefile in the output directory, if using a
459 # separate output directory. This allows convenient use of make in the 459 # separate output directory. This allows convenient use of make in the
460 # output directory. 460 # output directory.
461 outputmakefile: 461 outputmakefile:
462 ifneq ($(KBUILD_SRC),) 462 ifneq ($(KBUILD_SRC),)
463 $(Q)ln -fsn $(srctree) source 463 $(Q)ln -fsn $(srctree) source
464 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 464 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
465 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 465 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
466 endif 466 endif
467 467
468 # Support for using generic headers in asm-generic 468 # Support for using generic headers in asm-generic
469 PHONY += asm-generic 469 PHONY += asm-generic
470 asm-generic: 470 asm-generic:
471 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 471 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
472 src=asm obj=arch/$(SRCARCH)/include/generated/asm 472 src=asm obj=arch/$(SRCARCH)/include/generated/asm
473 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 473 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
474 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 474 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
475 475
476 # To make sure we do not include .config for any of the *config targets 476 # To make sure we do not include .config for any of the *config targets
477 # catch them early, and hand them over to scripts/kconfig/Makefile 477 # catch them early, and hand them over to scripts/kconfig/Makefile
478 # It is allowed to specify more targets when calling make, including 478 # It is allowed to specify more targets when calling make, including
479 # mixing *config targets and build targets. 479 # mixing *config targets and build targets.
480 # For example 'make oldconfig all'. 480 # For example 'make oldconfig all'.
481 # Detect when mixed targets is specified, and make a second invocation 481 # Detect when mixed targets is specified, and make a second invocation
482 # of make so .config is not included in this case either (for *config). 482 # of make so .config is not included in this case either (for *config).
483 483
484 version_h := include/generated/uapi/linux/version.h 484 version_h := include/generated/uapi/linux/version.h
485 old_version_h := include/linux/version.h 485 old_version_h := include/linux/version.h
486 486
487 no-dot-config-targets := clean mrproper distclean \ 487 no-dot-config-targets := clean mrproper distclean \
488 cscope gtags TAGS tags help% %docs check% coccicheck \ 488 cscope gtags TAGS tags help% %docs check% coccicheck \
489 $(version_h) headers_% archheaders archscripts \ 489 $(version_h) headers_% archheaders archscripts \
490 kernelversion %src-pkg 490 kernelversion %src-pkg
491 491
492 config-targets := 0 492 config-targets := 0
493 mixed-targets := 0 493 mixed-targets := 0
494 dot-config := 1 494 dot-config := 1
495 495
496 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 496 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
497 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 497 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
498 dot-config := 0 498 dot-config := 0
499 endif 499 endif
500 endif 500 endif
501 501
502 ifeq ($(KBUILD_EXTMOD),) 502 ifeq ($(KBUILD_EXTMOD),)
503 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 503 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
504 config-targets := 1 504 config-targets := 1
505 ifneq ($(words $(MAKECMDGOALS)),1) 505 ifneq ($(words $(MAKECMDGOALS)),1)
506 mixed-targets := 1 506 mixed-targets := 1
507 endif 507 endif
508 endif 508 endif
509 endif 509 endif
510 510
511 ifeq ($(mixed-targets),1) 511 ifeq ($(mixed-targets),1)
512 # =========================================================================== 512 # ===========================================================================
513 # We're called with mixed targets (*config and build targets). 513 # We're called with mixed targets (*config and build targets).
514 # Handle them one by one. 514 # Handle them one by one.
515 515
516 PHONY += $(MAKECMDGOALS) __build_one_by_one 516 PHONY += $(MAKECMDGOALS) __build_one_by_one
517 517
518 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 518 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
519 @: 519 @:
520 520
521 __build_one_by_one: 521 __build_one_by_one:
522 $(Q)set -e; \ 522 $(Q)set -e; \
523 for i in $(MAKECMDGOALS); do \ 523 for i in $(MAKECMDGOALS); do \
524 $(MAKE) -f $(srctree)/Makefile $$i; \ 524 $(MAKE) -f $(srctree)/Makefile $$i; \
525 done 525 done
526 526
527 else 527 else
528 ifeq ($(config-targets),1) 528 ifeq ($(config-targets),1)
529 # =========================================================================== 529 # ===========================================================================
530 # *config targets only - make sure prerequisites are updated, and descend 530 # *config targets only - make sure prerequisites are updated, and descend
531 # in scripts/kconfig to make the *config target 531 # in scripts/kconfig to make the *config target
532 532
533 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 533 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
534 # KBUILD_DEFCONFIG may point out an alternative default configuration 534 # KBUILD_DEFCONFIG may point out an alternative default configuration
535 # used for 'make defconfig' 535 # used for 'make defconfig'
536 include $(srctree)/arch/$(SRCARCH)/Makefile 536 include $(srctree)/arch/$(SRCARCH)/Makefile
537 export KBUILD_DEFCONFIG KBUILD_KCONFIG 537 export KBUILD_DEFCONFIG KBUILD_KCONFIG
538 538
539 config: scripts_basic outputmakefile FORCE 539 config: scripts_basic outputmakefile FORCE
540 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 540 $(Q)$(MAKE) $(build)=scripts/kconfig $@
541 541
542 %config: scripts_basic outputmakefile FORCE 542 %config: scripts_basic outputmakefile FORCE
543 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
544 544
545 else 545 else
546 # =========================================================================== 546 # ===========================================================================
547 # Build targets only - this includes vmlinux, arch specific targets, clean 547 # Build targets only - this includes vmlinux, arch specific targets, clean
548 # targets and others. In general all targets except *config targets. 548 # targets and others. In general all targets except *config targets.
549 549
550 ifeq ($(KBUILD_EXTMOD),) 550 ifeq ($(KBUILD_EXTMOD),)
551 # Additional helpers built in scripts/ 551 # Additional helpers built in scripts/
552 # Carefully list dependencies so we do not try to build scripts twice 552 # Carefully list dependencies so we do not try to build scripts twice
553 # in parallel 553 # in parallel
554 PHONY += scripts 554 PHONY += scripts
555 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 555 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
556 asm-generic 556 asm-generic
557 $(Q)$(MAKE) $(build)=$(@) 557 $(Q)$(MAKE) $(build)=$(@)
558 558
559 # Objects we will link into vmlinux / subdirs we need to visit 559 # Objects we will link into vmlinux / subdirs we need to visit
560 init-y := init/ 560 init-y := init/
561 drivers-y := drivers/ sound/ firmware/ 561 drivers-y := drivers/ sound/ firmware/
562 net-y := net/ 562 net-y := net/
563 libs-y := lib/ 563 libs-y := lib/
564 core-y := usr/ 564 core-y := usr/
565 endif # KBUILD_EXTMOD 565 endif # KBUILD_EXTMOD
566 566
567 ifeq ($(dot-config),1) 567 ifeq ($(dot-config),1)
568 # Read in config 568 # Read in config
569 -include include/config/auto.conf 569 -include include/config/auto.conf
570 570
571 ifeq ($(KBUILD_EXTMOD),) 571 ifeq ($(KBUILD_EXTMOD),)
572 # Read in dependencies to all Kconfig* files, make sure to run 572 # Read in dependencies to all Kconfig* files, make sure to run
573 # oldconfig if changes are detected. 573 # oldconfig if changes are detected.
574 -include include/config/auto.conf.cmd 574 -include include/config/auto.conf.cmd
575 575
576 # To avoid any implicit rule to kick in, define an empty command 576 # To avoid any implicit rule to kick in, define an empty command
577 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 577 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
578 578
579 # If .config is newer than include/config/auto.conf, someone tinkered 579 # If .config is newer than include/config/auto.conf, someone tinkered
580 # with it and forgot to run make oldconfig. 580 # with it and forgot to run make oldconfig.
581 # if auto.conf.cmd is missing then we are probably in a cleaned tree so 581 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
582 # we execute the config step to be sure to catch updated Kconfig files 582 # we execute the config step to be sure to catch updated Kconfig files
583 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 583 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
584 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 584 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
585 else 585 else
586 # external modules needs include/generated/autoconf.h and include/config/auto.conf 586 # external modules needs include/generated/autoconf.h and include/config/auto.conf
587 # but do not care if they are up-to-date. Use auto.conf to trigger the test 587 # but do not care if they are up-to-date. Use auto.conf to trigger the test
588 PHONY += include/config/auto.conf 588 PHONY += include/config/auto.conf
589 589
590 include/config/auto.conf: 590 include/config/auto.conf:
591 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 591 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
592 echo >&2; \ 592 echo >&2; \
593 echo >&2 " ERROR: Kernel configuration is invalid."; \ 593 echo >&2 " ERROR: Kernel configuration is invalid."; \
594 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 594 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
595 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 595 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
596 echo >&2 ; \ 596 echo >&2 ; \
597 /bin/false) 597 /bin/false)
598 598
599 endif # KBUILD_EXTMOD 599 endif # KBUILD_EXTMOD
600 600
601 else 601 else
602 # Dummy target needed, because used as prerequisite 602 # Dummy target needed, because used as prerequisite
603 include/config/auto.conf: ; 603 include/config/auto.conf: ;
604 endif # $(dot-config) 604 endif # $(dot-config)
605 605
606 # The all: target is the default when no target is given on the 606 # The all: target is the default when no target is given on the
607 # command line. 607 # command line.
608 # This allow a user to issue only 'make' to build a kernel including modules 608 # This allow a user to issue only 'make' to build a kernel including modules
609 # Defaults to vmlinux, but the arch makefile usually adds further targets 609 # Defaults to vmlinux, but the arch makefile usually adds further targets
610 all: vmlinux 610 all: vmlinux
611 611
612 include $(srctree)/arch/$(SRCARCH)/Makefile 612 include $(srctree)/arch/$(SRCARCH)/Makefile
613 613
614 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 614 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
615 615
616 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 616 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
617 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 617 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
618 else 618 else
619 KBUILD_CFLAGS += -O2 619 KBUILD_CFLAGS += -O2
620 endif 620 endif
621 621
622 # Tell gcc to never replace conditional load with a non-conditional one 622 # Tell gcc to never replace conditional load with a non-conditional one
623 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 623 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
624 624
625 ifdef CONFIG_READABLE_ASM 625 ifdef CONFIG_READABLE_ASM
626 # Disable optimizations that make assembler listings hard to read. 626 # Disable optimizations that make assembler listings hard to read.
627 # reorder blocks reorders the control in the function 627 # reorder blocks reorders the control in the function
628 # ipa clone creates specialized cloned functions 628 # ipa clone creates specialized cloned functions
629 # partial inlining inlines only parts of functions 629 # partial inlining inlines only parts of functions
630 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 630 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
631 $(call cc-option,-fno-ipa-cp-clone,) \ 631 $(call cc-option,-fno-ipa-cp-clone,) \
632 $(call cc-option,-fno-partial-inlining) 632 $(call cc-option,-fno-partial-inlining)
633 endif 633 endif
634 634
635 ifneq ($(CONFIG_FRAME_WARN),0) 635 ifneq ($(CONFIG_FRAME_WARN),0)
636 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 636 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
637 endif 637 endif
638 638
639 # Handle stack protector mode. 639 # Handle stack protector mode.
640 # 640 #
641 # Since kbuild can potentially perform two passes (first with the old 641 # Since kbuild can potentially perform two passes (first with the old
642 # .config values and then with updated .config values), we cannot error out 642 # .config values and then with updated .config values), we cannot error out
643 # if a desired compiler option is unsupported. If we were to error, kbuild 643 # if a desired compiler option is unsupported. If we were to error, kbuild
644 # could never get to the second pass and actually notice that we changed 644 # could never get to the second pass and actually notice that we changed
645 # the option to something that was supported. 645 # the option to something that was supported.
646 # 646 #
647 # Additionally, we don't want to fallback and/or silently change which compiler 647 # Additionally, we don't want to fallback and/or silently change which compiler
648 # flags will be used, since that leads to producing kernels with different 648 # flags will be used, since that leads to producing kernels with different
649 # security feature characteristics depending on the compiler used. ("But I 649 # security feature characteristics depending on the compiler used. ("But I
650 # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 650 # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
651 # 651 #
652 # The middle ground is to warn here so that the failed option is obvious, but 652 # The middle ground is to warn here so that the failed option is obvious, but
653 # to let the build fail with bad compiler flags so that we can't produce a 653 # to let the build fail with bad compiler flags so that we can't produce a
654 # kernel when there is a CONFIG and compiler mismatch. 654 # kernel when there is a CONFIG and compiler mismatch.
655 # 655 #
656 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 656 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
657 stackp-flag := -fstack-protector 657 stackp-flag := -fstack-protector
658 ifeq ($(call cc-option, $(stackp-flag)),) 658 ifeq ($(call cc-option, $(stackp-flag)),)
659 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \ 659 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
660 -fstack-protector not supported by compiler) 660 -fstack-protector not supported by compiler)
661 endif 661 endif
662 else 662 else
663 ifdef CONFIG_CC_STACKPROTECTOR_STRONG 663 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
664 stackp-flag := -fstack-protector-strong 664 stackp-flag := -fstack-protector-strong
665 ifeq ($(call cc-option, $(stackp-flag)),) 665 ifeq ($(call cc-option, $(stackp-flag)),)
666 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \ 666 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
667 -fstack-protector-strong not supported by compiler) 667 -fstack-protector-strong not supported by compiler)
668 endif 668 endif
669 else 669 else
670 # Force off for distro compilers that enable stack protector by default. 670 # Force off for distro compilers that enable stack protector by default.
671 stackp-flag := $(call cc-option, -fno-stack-protector) 671 stackp-flag := $(call cc-option, -fno-stack-protector)
672 endif 672 endif
673 endif 673 endif
674 KBUILD_CFLAGS += $(stackp-flag) 674 KBUILD_CFLAGS += $(stackp-flag)
675 675
676 ifeq ($(COMPILER),clang) 676 ifeq ($(COMPILER),clang)
677 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 677 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
678 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 678 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
679 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 679 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
680 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 680 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
681 KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 681 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
682 # Quiet clang warning: comparison of unsigned expression < 0 is always false 682 # Quiet clang warning: comparison of unsigned expression < 0 is always false
683 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 683 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
684 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 684 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
685 # source of a reference will be _MergedGlobals and not on of the whitelisted names. 685 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
686 # See modpost pattern 2 686 # See modpost pattern 2
687 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 687 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
688 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 688 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
689 else 689 else
690 690
691 # This warning generated too much noise in a regular build. 691 # This warning generated too much noise in a regular build.
692 # Use make W=1 to enable this warning (see scripts/Makefile.build) 692 # Use make W=1 to enable this warning (see scripts/Makefile.build)
693 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 693 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
694 endif 694 endif
695 695
696 ifdef CONFIG_FRAME_POINTER 696 ifdef CONFIG_FRAME_POINTER
697 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 697 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
698 else 698 else
699 # Some targets (ARM with Thumb2, for example), can't be built with frame 699 # Some targets (ARM with Thumb2, for example), can't be built with frame
700 # pointers. For those, we don't have FUNCTION_TRACER automatically 700 # pointers. For those, we don't have FUNCTION_TRACER automatically
701 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 701 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
702 # incompatible with -fomit-frame-pointer with current GCC, so we don't use 702 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
703 # -fomit-frame-pointer with FUNCTION_TRACER. 703 # -fomit-frame-pointer with FUNCTION_TRACER.
704 ifndef CONFIG_FUNCTION_TRACER 704 ifndef CONFIG_FUNCTION_TRACER
705 KBUILD_CFLAGS += -fomit-frame-pointer 705 KBUILD_CFLAGS += -fomit-frame-pointer
706 endif 706 endif
707 endif 707 endif
708 708
709 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 709 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
710 710
711 ifdef CONFIG_DEBUG_INFO 711 ifdef CONFIG_DEBUG_INFO
712 ifdef CONFIG_DEBUG_INFO_SPLIT 712 ifdef CONFIG_DEBUG_INFO_SPLIT
713 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 713 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
714 else 714 else
715 KBUILD_CFLAGS += -g 715 KBUILD_CFLAGS += -g
716 endif 716 endif
717 KBUILD_AFLAGS += -Wa,-gdwarf-2 717 KBUILD_AFLAGS += -Wa,-gdwarf-2
718 endif 718 endif
719 ifdef CONFIG_DEBUG_INFO_DWARF4 719 ifdef CONFIG_DEBUG_INFO_DWARF4
720 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 720 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
721 endif 721 endif
722 722
723 ifdef CONFIG_DEBUG_INFO_REDUCED 723 ifdef CONFIG_DEBUG_INFO_REDUCED
724 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 724 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
725 $(call cc-option,-fno-var-tracking) 725 $(call cc-option,-fno-var-tracking)
726 endif 726 endif
727 727
728 ifdef CONFIG_FUNCTION_TRACER 728 ifdef CONFIG_FUNCTION_TRACER
729 ifndef CC_FLAGS_FTRACE 729 ifndef CC_FLAGS_FTRACE
730 CC_FLAGS_FTRACE := -pg 730 CC_FLAGS_FTRACE := -pg
731 endif 731 endif
732 export CC_FLAGS_FTRACE 732 export CC_FLAGS_FTRACE
733 ifdef CONFIG_HAVE_FENTRY 733 ifdef CONFIG_HAVE_FENTRY
734 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 734 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
735 endif 735 endif
736 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 736 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
737 KBUILD_AFLAGS += $(CC_USING_FENTRY) 737 KBUILD_AFLAGS += $(CC_USING_FENTRY)
738 ifdef CONFIG_DYNAMIC_FTRACE 738 ifdef CONFIG_DYNAMIC_FTRACE
739 ifdef CONFIG_HAVE_C_RECORDMCOUNT 739 ifdef CONFIG_HAVE_C_RECORDMCOUNT
740 BUILD_C_RECORDMCOUNT := y 740 BUILD_C_RECORDMCOUNT := y
741 export BUILD_C_RECORDMCOUNT 741 export BUILD_C_RECORDMCOUNT
742 endif 742 endif
743 endif 743 endif
744 endif 744 endif
745 745
746 # We trigger additional mismatches with less inlining 746 # We trigger additional mismatches with less inlining
747 ifdef CONFIG_DEBUG_SECTION_MISMATCH 747 ifdef CONFIG_DEBUG_SECTION_MISMATCH
748 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 748 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
749 endif 749 endif
750 750
751 # arch Makefile may override CC so keep this after arch Makefile is included 751 # arch Makefile may override CC so keep this after arch Makefile is included
752 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 752 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
753 CHECKFLAGS += $(NOSTDINC_FLAGS) 753 CHECKFLAGS += $(NOSTDINC_FLAGS)
754 754
755 # warn about C99 declaration after statement 755 # warn about C99 declaration after statement
756 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 756 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
757 757
758 # disable pointer signed / unsigned warnings in gcc 4.0 758 # disable pointer signed / unsigned warnings in gcc 4.0
759 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 759 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
760 760
761 # disable invalid "can't wrap" optimizations for signed / pointers 761 # disable invalid "can't wrap" optimizations for signed / pointers
762 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 762 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
763 763
764 # conserve stack if available 764 # conserve stack if available
765 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 765 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
766 766
767 # disallow errors like 'EXPORT_GPL(foo);' with missing header 767 # disallow errors like 'EXPORT_GPL(foo);' with missing header
768 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 768 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
769 769
770 # require functions to have arguments in prototypes, not empty 'int foo()' 770 # require functions to have arguments in prototypes, not empty 'int foo()'
771 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 771 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
772 772
773 # Prohibit date/time macros, which would make the build non-deterministic 773 # Prohibit date/time macros, which would make the build non-deterministic
774 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 774 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
775 775
776 # use the deterministic mode of AR if available 776 # use the deterministic mode of AR if available
777 KBUILD_ARFLAGS := $(call ar-option,D) 777 KBUILD_ARFLAGS := $(call ar-option,D)
778 778
779 # check for 'asm goto' 779 # check for 'asm goto'
780 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 780 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
781 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 781 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
782 endif 782 endif
783 783
784 include $(srctree)/scripts/Makefile.kasan 784 include $(srctree)/scripts/Makefile.kasan
785 include $(srctree)/scripts/Makefile.extrawarn 785 include $(srctree)/scripts/Makefile.extrawarn
786 786
787 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 787 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
788 KBUILD_CPPFLAGS += $(KCPPFLAGS) 788 KBUILD_CPPFLAGS += $(KCPPFLAGS)
789 KBUILD_AFLAGS += $(KAFLAGS) 789 KBUILD_AFLAGS += $(KAFLAGS)
790 KBUILD_CFLAGS += $(KCFLAGS) 790 KBUILD_CFLAGS += $(KCFLAGS)
791 791
792 # Use --build-id when available. 792 # Use --build-id when available.
793 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 793 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
794 $(call cc-ldoption, -Wl$(comma)--build-id,)) 794 $(call cc-ldoption, -Wl$(comma)--build-id,))
795 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 795 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
796 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 796 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
797 797
798 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 798 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
799 LDFLAGS_vmlinux += $(call ld-option, -X,) 799 LDFLAGS_vmlinux += $(call ld-option, -X,)
800 endif 800 endif
801 801
802 # Default kernel image to build when no specific target is given. 802 # Default kernel image to build when no specific target is given.
803 # KBUILD_IMAGE may be overruled on the command line or 803 # KBUILD_IMAGE may be overruled on the command line or
804 # set in the environment 804 # set in the environment
805 # Also any assignments in arch/$(ARCH)/Makefile take precedence over 805 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
806 # this default value 806 # this default value
807 export KBUILD_IMAGE ?= vmlinux 807 export KBUILD_IMAGE ?= vmlinux
808 808
809 # 809 #
810 # INSTALL_PATH specifies where to place the updated kernel and system map 810 # INSTALL_PATH specifies where to place the updated kernel and system map
811 # images. Default is /boot, but you can set it to other values 811 # images. Default is /boot, but you can set it to other values
812 export INSTALL_PATH ?= /boot 812 export INSTALL_PATH ?= /boot
813 813
814 # 814 #
815 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 815 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
816 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 816 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
817 # an argument if needed. Otherwise it defaults to the kernel install path 817 # an argument if needed. Otherwise it defaults to the kernel install path
818 # 818 #
819 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 819 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
820 820
821 # 821 #
822 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 822 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
823 # relocations required by build roots. This is not defined in the 823 # relocations required by build roots. This is not defined in the
824 # makefile but the argument can be passed to make if needed. 824 # makefile but the argument can be passed to make if needed.
825 # 825 #
826 826
827 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 827 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
828 export MODLIB 828 export MODLIB
829 829
830 # 830 #
831 # INSTALL_MOD_STRIP, if defined, will cause modules to be 831 # INSTALL_MOD_STRIP, if defined, will cause modules to be
832 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 832 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
833 # the default option --strip-debug will be used. Otherwise, 833 # the default option --strip-debug will be used. Otherwise,
834 # INSTALL_MOD_STRIP value will be used as the options to the strip command. 834 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
835 835
836 ifdef INSTALL_MOD_STRIP 836 ifdef INSTALL_MOD_STRIP
837 ifeq ($(INSTALL_MOD_STRIP),1) 837 ifeq ($(INSTALL_MOD_STRIP),1)
838 mod_strip_cmd = $(STRIP) --strip-debug 838 mod_strip_cmd = $(STRIP) --strip-debug
839 else 839 else
840 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 840 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
841 endif # INSTALL_MOD_STRIP=1 841 endif # INSTALL_MOD_STRIP=1
842 else 842 else
843 mod_strip_cmd = true 843 mod_strip_cmd = true
844 endif # INSTALL_MOD_STRIP 844 endif # INSTALL_MOD_STRIP
845 export mod_strip_cmd 845 export mod_strip_cmd
846 846
847 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 847 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
848 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 848 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
849 # or CONFIG_MODULE_COMPRESS_XZ. 849 # or CONFIG_MODULE_COMPRESS_XZ.
850 850
851 mod_compress_cmd = true 851 mod_compress_cmd = true
852 ifdef CONFIG_MODULE_COMPRESS 852 ifdef CONFIG_MODULE_COMPRESS
853 ifdef CONFIG_MODULE_COMPRESS_GZIP 853 ifdef CONFIG_MODULE_COMPRESS_GZIP
854 mod_compress_cmd = gzip -n 854 mod_compress_cmd = gzip -n
855 endif # CONFIG_MODULE_COMPRESS_GZIP 855 endif # CONFIG_MODULE_COMPRESS_GZIP
856 ifdef CONFIG_MODULE_COMPRESS_XZ 856 ifdef CONFIG_MODULE_COMPRESS_XZ
857 mod_compress_cmd = xz 857 mod_compress_cmd = xz
858 endif # CONFIG_MODULE_COMPRESS_XZ 858 endif # CONFIG_MODULE_COMPRESS_XZ
859 endif # CONFIG_MODULE_COMPRESS 859 endif # CONFIG_MODULE_COMPRESS
860 export mod_compress_cmd 860 export mod_compress_cmd
861 861
862 # Select initial ramdisk compression format, default is gzip(1). 862 # Select initial ramdisk compression format, default is gzip(1).
863 # This shall be used by the dracut(8) tool while creating an initramfs image. 863 # This shall be used by the dracut(8) tool while creating an initramfs image.
864 # 864 #
865 INITRD_COMPRESS-y := gzip 865 INITRD_COMPRESS-y := gzip
866 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 866 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
867 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 867 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
868 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 868 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
869 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 869 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
870 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 870 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
871 # do not export INITRD_COMPRESS, since we didn't actually 871 # do not export INITRD_COMPRESS, since we didn't actually
872 # choose a sane default compression above. 872 # choose a sane default compression above.
873 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 873 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
874 874
875 ifdef CONFIG_MODULE_SIG_ALL 875 ifdef CONFIG_MODULE_SIG_ALL
876 MODSECKEY = ./signing_key.priv 876 MODSECKEY = ./signing_key.priv
877 MODPUBKEY = ./signing_key.x509 877 MODPUBKEY = ./signing_key.x509
878 export MODPUBKEY 878 export MODPUBKEY
879 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY) 879 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
880 else 880 else
881 mod_sign_cmd = true 881 mod_sign_cmd = true
882 endif 882 endif
883 export mod_sign_cmd 883 export mod_sign_cmd
884 884
885 885
886 ifeq ($(KBUILD_EXTMOD),) 886 ifeq ($(KBUILD_EXTMOD),)
887 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 887 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
888 888
889 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 889 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
890 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 890 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
891 $(net-y) $(net-m) $(libs-y) $(libs-m))) 891 $(net-y) $(net-m) $(libs-y) $(libs-m)))
892 892
893 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 893 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
894 $(init-) $(core-) $(drivers-) $(net-) $(libs-)))) 894 $(init-) $(core-) $(drivers-) $(net-) $(libs-))))
895 895
896 init-y := $(patsubst %/, %/built-in.o, $(init-y)) 896 init-y := $(patsubst %/, %/built-in.o, $(init-y))
897 core-y := $(patsubst %/, %/built-in.o, $(core-y)) 897 core-y := $(patsubst %/, %/built-in.o, $(core-y))
898 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 898 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
899 net-y := $(patsubst %/, %/built-in.o, $(net-y)) 899 net-y := $(patsubst %/, %/built-in.o, $(net-y))
900 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 900 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
901 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 901 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
902 libs-y := $(libs-y1) $(libs-y2) 902 libs-y := $(libs-y1) $(libs-y2)
903 903
904 # Externally visible symbols (used by link-vmlinux.sh) 904 # Externally visible symbols (used by link-vmlinux.sh)
905 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 905 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
906 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) 906 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
907 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 907 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
908 export LDFLAGS_vmlinux 908 export LDFLAGS_vmlinux
909 # used by scripts/pacmage/Makefile 909 # used by scripts/pacmage/Makefile
910 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt) 910 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
911 911
912 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 912 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
913 913
914 # Final link of vmlinux 914 # Final link of vmlinux
915 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) 915 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
916 quiet_cmd_link-vmlinux = LINK $@ 916 quiet_cmd_link-vmlinux = LINK $@
917 917
918 # Include targets which we want to 918 # Include targets which we want to
919 # execute if the rest of the kernel build went well. 919 # execute if the rest of the kernel build went well.
920 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE 920 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
921 ifdef CONFIG_HEADERS_CHECK 921 ifdef CONFIG_HEADERS_CHECK
922 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 922 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
923 endif 923 endif
924 ifdef CONFIG_SAMPLES 924 ifdef CONFIG_SAMPLES
925 $(Q)$(MAKE) $(build)=samples 925 $(Q)$(MAKE) $(build)=samples
926 endif 926 endif
927 ifdef CONFIG_BUILD_DOCSRC 927 ifdef CONFIG_BUILD_DOCSRC
928 $(Q)$(MAKE) $(build)=Documentation 928 $(Q)$(MAKE) $(build)=Documentation
929 endif 929 endif
930 ifdef CONFIG_GDB_SCRIPTS 930 ifdef CONFIG_GDB_SCRIPTS
931 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 931 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
932 endif 932 endif
933 +$(call if_changed,link-vmlinux) 933 +$(call if_changed,link-vmlinux)
934 934
935 # The actual objects are generated when descending, 935 # The actual objects are generated when descending,
936 # make sure no implicit rule kicks in 936 # make sure no implicit rule kicks in
937 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 937 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
938 938
939 # Handle descending into subdirectories listed in $(vmlinux-dirs) 939 # Handle descending into subdirectories listed in $(vmlinux-dirs)
940 # Preset locale variables to speed up the build process. Limit locale 940 # Preset locale variables to speed up the build process. Limit locale
941 # tweaks to this spot to avoid wrong language settings when running 941 # tweaks to this spot to avoid wrong language settings when running
942 # make menuconfig etc. 942 # make menuconfig etc.
943 # Error messages still appears in the original language 943 # Error messages still appears in the original language
944 944
945 PHONY += $(vmlinux-dirs) 945 PHONY += $(vmlinux-dirs)
946 $(vmlinux-dirs): prepare scripts 946 $(vmlinux-dirs): prepare scripts
947 $(Q)$(MAKE) $(build)=$@ 947 $(Q)$(MAKE) $(build)=$@
948 948
949 define filechk_kernel.release 949 define filechk_kernel.release
950 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 950 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
951 endef 951 endef
952 952
953 # Store (new) KERNELRELEASE string in include/config/kernel.release 953 # Store (new) KERNELRELEASE string in include/config/kernel.release
954 include/config/kernel.release: include/config/auto.conf FORCE 954 include/config/kernel.release: include/config/auto.conf FORCE
955 $(call filechk,kernel.release) 955 $(call filechk,kernel.release)
956 956
957 957
958 # Things we need to do before we recursively start building the kernel 958 # Things we need to do before we recursively start building the kernel
959 # or the modules are listed in "prepare". 959 # or the modules are listed in "prepare".
960 # A multi level approach is used. prepareN is processed before prepareN-1. 960 # A multi level approach is used. prepareN is processed before prepareN-1.
961 # archprepare is used in arch Makefiles and when processed asm symlink, 961 # archprepare is used in arch Makefiles and when processed asm symlink,
962 # version.h and scripts_basic is processed / created. 962 # version.h and scripts_basic is processed / created.
963 963
964 # Listed in dependency order 964 # Listed in dependency order
965 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 965 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
966 966
967 # prepare3 is used to check if we are building in a separate output directory, 967 # prepare3 is used to check if we are building in a separate output directory,
968 # and if so do: 968 # and if so do:
969 # 1) Check that make has not been executed in the kernel src $(srctree) 969 # 1) Check that make has not been executed in the kernel src $(srctree)
970 prepare3: include/config/kernel.release 970 prepare3: include/config/kernel.release
971 ifneq ($(KBUILD_SRC),) 971 ifneq ($(KBUILD_SRC),)
972 @$(kecho) ' Using $(srctree) as source for kernel' 972 @$(kecho) ' Using $(srctree) as source for kernel'
973 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 973 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
974 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 974 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
975 echo >&2 " in the '$(srctree)' directory.";\ 975 echo >&2 " in the '$(srctree)' directory.";\
976 /bin/false; \ 976 /bin/false; \
977 fi; 977 fi;
978 endif 978 endif
979 979
980 # prepare2 creates a makefile if using a separate output directory 980 # prepare2 creates a makefile if using a separate output directory
981 prepare2: prepare3 outputmakefile asm-generic 981 prepare2: prepare3 outputmakefile asm-generic
982 982
983 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 983 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
984 include/config/auto.conf 984 include/config/auto.conf
985 $(cmd_crmodverdir) 985 $(cmd_crmodverdir)
986 986
987 archprepare: archheaders archscripts prepare1 scripts_basic 987 archprepare: archheaders archscripts prepare1 scripts_basic
988 988
989 prepare0: archprepare FORCE 989 prepare0: archprepare FORCE
990 $(Q)$(MAKE) $(build)=. 990 $(Q)$(MAKE) $(build)=.
991 991
992 # All the preparing.. 992 # All the preparing..
993 prepare: prepare0 993 prepare: prepare0
994 994
995 # Generate some files 995 # Generate some files
996 # --------------------------------------------------------------------------- 996 # ---------------------------------------------------------------------------
997 997
998 # KERNELRELEASE can change from a few different places, meaning version.h 998 # KERNELRELEASE can change from a few different places, meaning version.h
999 # needs to be updated, so this check is forced on all builds 999 # needs to be updated, so this check is forced on all builds
1000 1000
1001 uts_len := 64 1001 uts_len := 64
1002 define filechk_utsrelease.h 1002 define filechk_utsrelease.h
1003 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1003 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1004 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1004 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1005 exit 1; \ 1005 exit 1; \
1006 fi; \ 1006 fi; \
1007 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1007 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1008 endef 1008 endef
1009 1009
1010 define filechk_version.h 1010 define filechk_version.h
1011 (echo \#define LINUX_VERSION_CODE $(shell \ 1011 (echo \#define LINUX_VERSION_CODE $(shell \
1012 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1012 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1013 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1013 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1014 endef 1014 endef
1015 1015
1016 $(version_h): $(srctree)/Makefile FORCE 1016 $(version_h): $(srctree)/Makefile FORCE
1017 $(call filechk,version.h) 1017 $(call filechk,version.h)
1018 $(Q)rm -f $(old_version_h) 1018 $(Q)rm -f $(old_version_h)
1019 1019
1020 include/generated/utsrelease.h: include/config/kernel.release FORCE 1020 include/generated/utsrelease.h: include/config/kernel.release FORCE
1021 $(call filechk,utsrelease.h) 1021 $(call filechk,utsrelease.h)
1022 1022
1023 PHONY += headerdep 1023 PHONY += headerdep
1024 headerdep: 1024 headerdep:
1025 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1025 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1026 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1026 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1027 1027
1028 # --------------------------------------------------------------------------- 1028 # ---------------------------------------------------------------------------
1029 1029
1030 PHONY += depend dep 1030 PHONY += depend dep
1031 depend dep: 1031 depend dep:
1032 @echo '*** Warning: make $@ is unnecessary now.' 1032 @echo '*** Warning: make $@ is unnecessary now.'
1033 1033
1034 # --------------------------------------------------------------------------- 1034 # ---------------------------------------------------------------------------
1035 # Firmware install 1035 # Firmware install
1036 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1036 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1037 export INSTALL_FW_PATH 1037 export INSTALL_FW_PATH
1038 1038
1039 PHONY += firmware_install 1039 PHONY += firmware_install
1040 firmware_install: FORCE 1040 firmware_install: FORCE
1041 @mkdir -p $(objtree)/firmware 1041 @mkdir -p $(objtree)/firmware
1042 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1042 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1043 1043
1044 # --------------------------------------------------------------------------- 1044 # ---------------------------------------------------------------------------
1045 # Kernel headers 1045 # Kernel headers
1046 1046
1047 #Default location for installed headers 1047 #Default location for installed headers
1048 export INSTALL_HDR_PATH = $(objtree)/usr 1048 export INSTALL_HDR_PATH = $(objtree)/usr
1049 1049
1050 # If we do an all arch process set dst to asm-$(hdr-arch) 1050 # If we do an all arch process set dst to asm-$(hdr-arch)
1051 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1051 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1052 1052
1053 PHONY += archheaders 1053 PHONY += archheaders
1054 archheaders: 1054 archheaders:
1055 1055
1056 PHONY += archscripts 1056 PHONY += archscripts
1057 archscripts: 1057 archscripts:
1058 1058
1059 PHONY += __headers 1059 PHONY += __headers
1060 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE 1060 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
1061 $(Q)$(MAKE) $(build)=scripts build_unifdef 1061 $(Q)$(MAKE) $(build)=scripts build_unifdef
1062 1062
1063 PHONY += headers_install_all 1063 PHONY += headers_install_all
1064 headers_install_all: 1064 headers_install_all:
1065 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1065 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1066 1066
1067 PHONY += headers_install 1067 PHONY += headers_install
1068 headers_install: __headers 1068 headers_install: __headers
1069 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1069 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1070 $(error Headers not exportable for the $(SRCARCH) architecture)) 1070 $(error Headers not exportable for the $(SRCARCH) architecture))
1071 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1071 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 1072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1073 1073
1074 PHONY += headers_check_all 1074 PHONY += headers_check_all
1075 headers_check_all: headers_install_all 1075 headers_check_all: headers_install_all
1076 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1076 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1077 1077
1078 PHONY += headers_check 1078 PHONY += headers_check
1079 headers_check: headers_install 1079 headers_check: headers_install
1080 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1080 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1081 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 1081 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1082 1082
1083 # --------------------------------------------------------------------------- 1083 # ---------------------------------------------------------------------------
1084 # Kernel selftest 1084 # Kernel selftest
1085 1085
1086 PHONY += kselftest 1086 PHONY += kselftest
1087 kselftest: 1087 kselftest:
1088 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1088 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1089 1089
1090 # --------------------------------------------------------------------------- 1090 # ---------------------------------------------------------------------------
1091 # Modules 1091 # Modules
1092 1092
1093 ifdef CONFIG_MODULES 1093 ifdef CONFIG_MODULES
1094 1094
1095 # By default, build modules as well 1095 # By default, build modules as well
1096 1096
1097 all: modules 1097 all: modules
1098 1098
1099 # Build modules 1099 # Build modules
1100 # 1100 #
1101 # A module can be listed more than once in obj-m resulting in 1101 # A module can be listed more than once in obj-m resulting in
1102 # duplicate lines in modules.order files. Those are removed 1102 # duplicate lines in modules.order files. Those are removed
1103 # using awk while concatenating to the final file. 1103 # using awk while concatenating to the final file.
1104 1104
1105 PHONY += modules 1105 PHONY += modules
1106 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1106 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1107 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1107 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1108 @$(kecho) ' Building modules, stage 2.'; 1108 @$(kecho) ' Building modules, stage 2.';
1109 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1109 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1110 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1110 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1111 1111
1112 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1112 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1113 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1113 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1114 1114
1115 %/modules.builtin: include/config/auto.conf 1115 %/modules.builtin: include/config/auto.conf
1116 $(Q)$(MAKE) $(modbuiltin)=$* 1116 $(Q)$(MAKE) $(modbuiltin)=$*
1117 1117
1118 1118
1119 # Target to prepare building external modules 1119 # Target to prepare building external modules
1120 PHONY += modules_prepare 1120 PHONY += modules_prepare
1121 modules_prepare: prepare scripts 1121 modules_prepare: prepare scripts
1122 1122
1123 # Target to install modules 1123 # Target to install modules
1124 PHONY += modules_install 1124 PHONY += modules_install
1125 modules_install: _modinst_ _modinst_post 1125 modules_install: _modinst_ _modinst_post
1126 1126
1127 PHONY += _modinst_ 1127 PHONY += _modinst_
1128 _modinst_: 1128 _modinst_:
1129 @rm -rf $(MODLIB)/kernel 1129 @rm -rf $(MODLIB)/kernel
1130 @rm -f $(MODLIB)/source 1130 @rm -f $(MODLIB)/source
1131 @mkdir -p $(MODLIB)/kernel 1131 @mkdir -p $(MODLIB)/kernel
1132 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1132 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1133 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1133 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1134 rm -f $(MODLIB)/build ; \ 1134 rm -f $(MODLIB)/build ; \
1135 ln -s $(CURDIR) $(MODLIB)/build ; \ 1135 ln -s $(CURDIR) $(MODLIB)/build ; \
1136 fi 1136 fi
1137 @cp -f $(objtree)/modules.order $(MODLIB)/ 1137 @cp -f $(objtree)/modules.order $(MODLIB)/
1138 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1138 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1139 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1139 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1140 1140
1141 # This depmod is only for convenience to give the initial 1141 # This depmod is only for convenience to give the initial
1142 # boot a modules.dep even before / is mounted read-write. However the 1142 # boot a modules.dep even before / is mounted read-write. However the
1143 # boot script depmod is the master version. 1143 # boot script depmod is the master version.
1144 PHONY += _modinst_post 1144 PHONY += _modinst_post
1145 _modinst_post: _modinst_ 1145 _modinst_post: _modinst_
1146 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1146 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1147 $(call cmd,depmod) 1147 $(call cmd,depmod)
1148 1148
1149 ifeq ($(CONFIG_MODULE_SIG), y) 1149 ifeq ($(CONFIG_MODULE_SIG), y)
1150 PHONY += modules_sign 1150 PHONY += modules_sign
1151 modules_sign: 1151 modules_sign:
1152 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1152 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1153 endif 1153 endif
1154 1154
1155 else # CONFIG_MODULES 1155 else # CONFIG_MODULES
1156 1156
1157 # Modules not configured 1157 # Modules not configured
1158 # --------------------------------------------------------------------------- 1158 # ---------------------------------------------------------------------------
1159 1159
1160 modules modules_install: FORCE 1160 modules modules_install: FORCE
1161 @echo >&2 1161 @echo >&2
1162 @echo >&2 "The present kernel configuration has modules disabled." 1162 @echo >&2 "The present kernel configuration has modules disabled."
1163 @echo >&2 "Type 'make config' and enable loadable module support." 1163 @echo >&2 "Type 'make config' and enable loadable module support."
1164 @echo >&2 "Then build a kernel with module support enabled." 1164 @echo >&2 "Then build a kernel with module support enabled."
1165 @echo >&2 1165 @echo >&2
1166 @exit 1 1166 @exit 1
1167 1167
1168 endif # CONFIG_MODULES 1168 endif # CONFIG_MODULES
1169 1169
1170 ### 1170 ###
1171 # Cleaning is done on three levels. 1171 # Cleaning is done on three levels.
1172 # make clean Delete most generated files 1172 # make clean Delete most generated files
1173 # Leave enough to build external modules 1173 # Leave enough to build external modules
1174 # make mrproper Delete the current configuration, and all generated files 1174 # make mrproper Delete the current configuration, and all generated files
1175 # make distclean Remove editor backup files, patch leftover files and the like 1175 # make distclean Remove editor backup files, patch leftover files and the like
1176 1176
1177 # Directories & files removed with 'make clean' 1177 # Directories & files removed with 'make clean'
1178 CLEAN_DIRS += $(MODVERDIR) 1178 CLEAN_DIRS += $(MODVERDIR)
1179 1179
1180 # Directories & files removed with 'make mrproper' 1180 # Directories & files removed with 'make mrproper'
1181 MRPROPER_DIRS += include/config usr/include include/generated \ 1181 MRPROPER_DIRS += include/config usr/include include/generated \
1182 arch/*/include/generated .tmp_objdiff 1182 arch/*/include/generated .tmp_objdiff
1183 MRPROPER_FILES += .config .config.old .version .old_version \ 1183 MRPROPER_FILES += .config .config.old .version .old_version \
1184 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1184 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1185 signing_key.priv signing_key.x509 x509.genkey \ 1185 signing_key.priv signing_key.x509 x509.genkey \
1186 extra_certificates signing_key.x509.keyid \ 1186 extra_certificates signing_key.x509.keyid \
1187 signing_key.x509.signer vmlinux-gdb.py 1187 signing_key.x509.signer vmlinux-gdb.py
1188 1188
1189 # clean - Delete most, but leave enough to build external modules 1189 # clean - Delete most, but leave enough to build external modules
1190 # 1190 #
1191 clean: rm-dirs := $(CLEAN_DIRS) 1191 clean: rm-dirs := $(CLEAN_DIRS)
1192 clean: rm-files := $(CLEAN_FILES) 1192 clean: rm-files := $(CLEAN_FILES)
1193 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1193 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1194 1194
1195 PHONY += $(clean-dirs) clean archclean vmlinuxclean 1195 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1196 $(clean-dirs): 1196 $(clean-dirs):
1197 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1197 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1198 1198
1199 vmlinuxclean: 1199 vmlinuxclean:
1200 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1200 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1201 1201
1202 clean: archclean vmlinuxclean 1202 clean: archclean vmlinuxclean
1203 1203
1204 # mrproper - Delete all generated files, including .config 1204 # mrproper - Delete all generated files, including .config
1205 # 1205 #
1206 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1206 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1207 mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1207 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1208 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1208 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1209 1209
1210 PHONY += $(mrproper-dirs) mrproper archmrproper 1210 PHONY += $(mrproper-dirs) mrproper archmrproper
1211 $(mrproper-dirs): 1211 $(mrproper-dirs):
1212 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1212 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1213 1213
1214 mrproper: clean archmrproper $(mrproper-dirs) 1214 mrproper: clean archmrproper $(mrproper-dirs)
1215 $(call cmd,rmdirs) 1215 $(call cmd,rmdirs)
1216 $(call cmd,rmfiles) 1216 $(call cmd,rmfiles)
1217 1217
1218 # distclean 1218 # distclean
1219 # 1219 #
1220 PHONY += distclean 1220 PHONY += distclean
1221 1221
1222 distclean: mrproper 1222 distclean: mrproper
1223 @find $(srctree) $(RCS_FIND_IGNORE) \ 1223 @find $(srctree) $(RCS_FIND_IGNORE) \
1224 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1224 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1225 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1225 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1226 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 1226 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1227 -type f -print | xargs rm -f 1227 -type f -print | xargs rm -f
1228 1228
1229 1229
1230 # Packaging of the kernel to various formats 1230 # Packaging of the kernel to various formats
1231 # --------------------------------------------------------------------------- 1231 # ---------------------------------------------------------------------------
1232 # rpm target kept for backward compatibility 1232 # rpm target kept for backward compatibility
1233 package-dir := scripts/package 1233 package-dir := scripts/package
1234 1234
1235 %src-pkg: FORCE 1235 %src-pkg: FORCE
1236 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1236 $(Q)$(MAKE) $(build)=$(package-dir) $@
1237 %pkg: include/config/kernel.release FORCE 1237 %pkg: include/config/kernel.release FORCE
1238 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1238 $(Q)$(MAKE) $(build)=$(package-dir) $@
1239 rpm: include/config/kernel.release FORCE 1239 rpm: include/config/kernel.release FORCE
1240 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1240 $(Q)$(MAKE) $(build)=$(package-dir) $@
1241 1241
1242 1242
1243 # Brief documentation of the typical targets used 1243 # Brief documentation of the typical targets used
1244 # --------------------------------------------------------------------------- 1244 # ---------------------------------------------------------------------------
1245 1245
1246 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1246 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1247 boards := $(sort $(notdir $(boards))) 1247 boards := $(sort $(notdir $(boards)))
1248 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1248 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1249 board-dirs := $(sort $(notdir $(board-dirs:/=))) 1249 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1250 1250
1251 help: 1251 help:
1252 @echo 'Cleaning targets:' 1252 @echo 'Cleaning targets:'
1253 @echo ' clean - Remove most generated files but keep the config and' 1253 @echo ' clean - Remove most generated files but keep the config and'
1254 @echo ' enough build support to build external modules' 1254 @echo ' enough build support to build external modules'
1255 @echo ' mrproper - Remove all generated files + config + various backup files' 1255 @echo ' mrproper - Remove all generated files + config + various backup files'
1256 @echo ' distclean - mrproper + remove editor backup and patch files' 1256 @echo ' distclean - mrproper + remove editor backup and patch files'
1257 @echo '' 1257 @echo ''
1258 @echo 'Configuration targets:' 1258 @echo 'Configuration targets:'
1259 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1259 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1260 @echo '' 1260 @echo ''
1261 @echo 'Other generic targets:' 1261 @echo 'Other generic targets:'
1262 @echo ' all - Build all targets marked with [*]' 1262 @echo ' all - Build all targets marked with [*]'
1263 @echo '* vmlinux - Build the bare kernel' 1263 @echo '* vmlinux - Build the bare kernel'
1264 @echo '* modules - Build all modules' 1264 @echo '* modules - Build all modules'
1265 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1265 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1266 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1266 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1267 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1267 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1268 @echo ' dir/ - Build all files in dir and below' 1268 @echo ' dir/ - Build all files in dir and below'
1269 @echo ' dir/file.[oisS] - Build specified target only' 1269 @echo ' dir/file.[oisS] - Build specified target only'
1270 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1270 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1271 @echo ' (requires a recent binutils and recent build (System.map))' 1271 @echo ' (requires a recent binutils and recent build (System.map))'
1272 @echo ' dir/file.ko - Build module including final link' 1272 @echo ' dir/file.ko - Build module including final link'
1273 @echo ' modules_prepare - Set up for building external modules' 1273 @echo ' modules_prepare - Set up for building external modules'
1274 @echo ' tags/TAGS - Generate tags file for editors' 1274 @echo ' tags/TAGS - Generate tags file for editors'
1275 @echo ' cscope - Generate cscope index' 1275 @echo ' cscope - Generate cscope index'
1276 @echo ' gtags - Generate GNU GLOBAL index' 1276 @echo ' gtags - Generate GNU GLOBAL index'
1277 @echo ' kernelrelease - Output the release version string (use with make -s)' 1277 @echo ' kernelrelease - Output the release version string (use with make -s)'
1278 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1278 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1279 @echo ' image_name - Output the image name (use with make -s)' 1279 @echo ' image_name - Output the image name (use with make -s)'
1280 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1280 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1281 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1281 echo ' (default: $(INSTALL_HDR_PATH))'; \
1282 echo '' 1282 echo ''
1283 @echo 'Static analysers' 1283 @echo 'Static analysers'
1284 @echo ' checkstack - Generate a list of stack hogs' 1284 @echo ' checkstack - Generate a list of stack hogs'
1285 @echo ' namespacecheck - Name space analysis on compiled kernel' 1285 @echo ' namespacecheck - Name space analysis on compiled kernel'
1286 @echo ' versioncheck - Sanity check on version.h usage' 1286 @echo ' versioncheck - Sanity check on version.h usage'
1287 @echo ' includecheck - Check for duplicate included header files' 1287 @echo ' includecheck - Check for duplicate included header files'
1288 @echo ' export_report - List the usages of all exported symbols' 1288 @echo ' export_report - List the usages of all exported symbols'
1289 @echo ' headers_check - Sanity check on exported headers' 1289 @echo ' headers_check - Sanity check on exported headers'
1290 @echo ' headerdep - Detect inclusion cycles in headers' 1290 @echo ' headerdep - Detect inclusion cycles in headers'
1291 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1291 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1292 @echo '' 1292 @echo ''
1293 @echo 'Kernel selftest' 1293 @echo 'Kernel selftest'
1294 @echo ' kselftest - Build and run kernel selftest (run as root)' 1294 @echo ' kselftest - Build and run kernel selftest (run as root)'
1295 @echo ' Build, install, and boot kernel before' 1295 @echo ' Build, install, and boot kernel before'
1296 @echo ' running kselftest on it' 1296 @echo ' running kselftest on it'
1297 @echo '' 1297 @echo ''
1298 @echo 'Kernel packaging:' 1298 @echo 'Kernel packaging:'
1299 @$(MAKE) $(build)=$(package-dir) help 1299 @$(MAKE) $(build)=$(package-dir) help
1300 @echo '' 1300 @echo ''
1301 @echo 'Documentation targets:' 1301 @echo 'Documentation targets:'
1302 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1302 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1303 @echo '' 1303 @echo ''
1304 @echo 'Architecture specific targets ($(SRCARCH)):' 1304 @echo 'Architecture specific targets ($(SRCARCH)):'
1305 @$(if $(archhelp),$(archhelp),\ 1305 @$(if $(archhelp),$(archhelp),\
1306 echo ' No architecture specific help defined for $(SRCARCH)') 1306 echo ' No architecture specific help defined for $(SRCARCH)')
1307 @echo '' 1307 @echo ''
1308 @$(if $(boards), \ 1308 @$(if $(boards), \
1309 $(foreach b, $(boards), \ 1309 $(foreach b, $(boards), \
1310 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1310 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1311 echo '') 1311 echo '')
1312 @$(if $(board-dirs), \ 1312 @$(if $(board-dirs), \
1313 $(foreach b, $(board-dirs), \ 1313 $(foreach b, $(board-dirs), \
1314 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1314 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1315 printf " %-16s - Show all of the above\\n" help-boards; \ 1315 printf " %-16s - Show all of the above\\n" help-boards; \
1316 echo '') 1316 echo '')
1317 1317
1318 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1318 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1319 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1319 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1320 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1320 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1321 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1321 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1322 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1322 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1323 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1323 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1324 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1324 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1325 @echo ' 1: warnings which may be relevant and do not occur too often' 1325 @echo ' 1: warnings which may be relevant and do not occur too often'
1326 @echo ' 2: warnings which occur quite often but may still be relevant' 1326 @echo ' 2: warnings which occur quite often but may still be relevant'
1327 @echo ' 3: more obscure warnings, can most likely be ignored' 1327 @echo ' 3: more obscure warnings, can most likely be ignored'
1328 @echo ' Multiple levels can be combined with W=12 or W=123' 1328 @echo ' Multiple levels can be combined with W=12 or W=123'
1329 @echo '' 1329 @echo ''
1330 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1330 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1331 @echo 'For further info see the ./README file' 1331 @echo 'For further info see the ./README file'
1332 1332
1333 1333
1334 help-board-dirs := $(addprefix help-,$(board-dirs)) 1334 help-board-dirs := $(addprefix help-,$(board-dirs))
1335 1335
1336 help-boards: $(help-board-dirs) 1336 help-boards: $(help-board-dirs)
1337 1337
1338 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1338 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1339 1339
1340 $(help-board-dirs): help-%: 1340 $(help-board-dirs): help-%:
1341 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1341 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1342 @$(if $(boards-per-dir), \ 1342 @$(if $(boards-per-dir), \
1343 $(foreach b, $(boards-per-dir), \ 1343 $(foreach b, $(boards-per-dir), \
1344 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1344 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1345 echo '') 1345 echo '')
1346 1346
1347 1347
1348 # Documentation targets 1348 # Documentation targets
1349 # --------------------------------------------------------------------------- 1349 # ---------------------------------------------------------------------------
1350 %docs: scripts_basic FORCE 1350 %docs: scripts_basic FORCE
1351 $(Q)$(MAKE) $(build)=scripts build_docproc 1351 $(Q)$(MAKE) $(build)=scripts build_docproc
1352 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1352 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1353 1353
1354 else # KBUILD_EXTMOD 1354 else # KBUILD_EXTMOD
1355 1355
1356 ### 1356 ###
1357 # External module support. 1357 # External module support.
1358 # When building external modules the kernel used as basis is considered 1358 # When building external modules the kernel used as basis is considered
1359 # read-only, and no consistency checks are made and the make 1359 # read-only, and no consistency checks are made and the make
1360 # system is not used on the basis kernel. If updates are required 1360 # system is not used on the basis kernel. If updates are required
1361 # in the basis kernel ordinary make commands (without M=...) must 1361 # in the basis kernel ordinary make commands (without M=...) must
1362 # be used. 1362 # be used.
1363 # 1363 #
1364 # The following are the only valid targets when building external 1364 # The following are the only valid targets when building external
1365 # modules. 1365 # modules.
1366 # make M=dir clean Delete all automatically generated files 1366 # make M=dir clean Delete all automatically generated files
1367 # make M=dir modules Make all modules in specified dir 1367 # make M=dir modules Make all modules in specified dir
1368 # make M=dir Same as 'make M=dir modules' 1368 # make M=dir Same as 'make M=dir modules'
1369 # make M=dir modules_install 1369 # make M=dir modules_install
1370 # Install the modules built in the module directory 1370 # Install the modules built in the module directory
1371 # Assumes install directory is already created 1371 # Assumes install directory is already created
1372 1372
1373 # We are always building modules 1373 # We are always building modules
1374 KBUILD_MODULES := 1 1374 KBUILD_MODULES := 1
1375 PHONY += crmodverdir 1375 PHONY += crmodverdir
1376 crmodverdir: 1376 crmodverdir:
1377 $(cmd_crmodverdir) 1377 $(cmd_crmodverdir)
1378 1378
1379 PHONY += $(objtree)/Module.symvers 1379 PHONY += $(objtree)/Module.symvers
1380 $(objtree)/Module.symvers: 1380 $(objtree)/Module.symvers:
1381 @test -e $(objtree)/Module.symvers || ( \ 1381 @test -e $(objtree)/Module.symvers || ( \
1382 echo; \ 1382 echo; \
1383 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1383 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1384 echo " is missing; modules will have no dependencies and modversions."; \ 1384 echo " is missing; modules will have no dependencies and modversions."; \
1385 echo ) 1385 echo )
1386 1386
1387 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1387 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1388 PHONY += $(module-dirs) modules 1388 PHONY += $(module-dirs) modules
1389 $(module-dirs): crmodverdir $(objtree)/Module.symvers 1389 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1390 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1390 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1391 1391
1392 modules: $(module-dirs) 1392 modules: $(module-dirs)
1393 @$(kecho) ' Building modules, stage 2.'; 1393 @$(kecho) ' Building modules, stage 2.';
1394 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1394 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1395 1395
1396 PHONY += modules_install 1396 PHONY += modules_install
1397 modules_install: _emodinst_ _emodinst_post 1397 modules_install: _emodinst_ _emodinst_post
1398 1398
1399 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1399 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1400 PHONY += _emodinst_ 1400 PHONY += _emodinst_
1401 _emodinst_: 1401 _emodinst_:
1402 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1402 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1404 1404
1405 PHONY += _emodinst_post 1405 PHONY += _emodinst_post
1406 _emodinst_post: _emodinst_ 1406 _emodinst_post: _emodinst_
1407 $(call cmd,depmod) 1407 $(call cmd,depmod)
1408 1408
1409 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1409 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1410 1410
1411 PHONY += $(clean-dirs) clean 1411 PHONY += $(clean-dirs) clean
1412 $(clean-dirs): 1412 $(clean-dirs):
1413 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1413 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1414 1414
1415 clean: rm-dirs := $(MODVERDIR) 1415 clean: rm-dirs := $(MODVERDIR)
1416 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1416 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1417 1417
1418 help: 1418 help:
1419 @echo ' Building external modules.' 1419 @echo ' Building external modules.'
1420 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1420 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1421 @echo '' 1421 @echo ''
1422 @echo ' modules - default target, build the module(s)' 1422 @echo ' modules - default target, build the module(s)'
1423 @echo ' modules_install - install the module' 1423 @echo ' modules_install - install the module'
1424 @echo ' clean - remove generated files in module directory only' 1424 @echo ' clean - remove generated files in module directory only'
1425 @echo '' 1425 @echo ''
1426 1426
1427 # Dummies... 1427 # Dummies...
1428 PHONY += prepare scripts 1428 PHONY += prepare scripts
1429 prepare: ; 1429 prepare: ;
1430 scripts: ; 1430 scripts: ;
1431 endif # KBUILD_EXTMOD 1431 endif # KBUILD_EXTMOD
1432 1432
1433 clean: $(clean-dirs) 1433 clean: $(clean-dirs)
1434 $(call cmd,rmdirs) 1434 $(call cmd,rmdirs)
1435 $(call cmd,rmfiles) 1435 $(call cmd,rmfiles)
1436 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1436 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1437 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1437 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1438 -o -name '*.ko.*' \ 1438 -o -name '*.ko.*' \
1439 -o -name '*.dwo' \ 1439 -o -name '*.dwo' \
1440 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1440 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1441 -o -name '*.symtypes' -o -name 'modules.order' \ 1441 -o -name '*.symtypes' -o -name 'modules.order' \
1442 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1442 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1443 -o -name '*.gcno' \) -type f -print | xargs rm -f 1443 -o -name '*.gcno' \) -type f -print | xargs rm -f
1444 1444
1445 # Generate tags for editors 1445 # Generate tags for editors
1446 # --------------------------------------------------------------------------- 1446 # ---------------------------------------------------------------------------
1447 quiet_cmd_tags = GEN $@ 1447 quiet_cmd_tags = GEN $@
1448 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1448 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1449 1449
1450 tags TAGS cscope gtags: FORCE 1450 tags TAGS cscope gtags: FORCE
1451 $(call cmd,tags) 1451 $(call cmd,tags)
1452 1452
1453 # Scripts to check various things for consistency 1453 # Scripts to check various things for consistency
1454 # --------------------------------------------------------------------------- 1454 # ---------------------------------------------------------------------------
1455 1455
1456 PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1456 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1457 1457
1458 includecheck: 1458 includecheck:
1459 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1459 find $(srctree)/* $(RCS_FIND_IGNORE) \
1460 -name '*.[hcS]' -type f -print | sort \ 1460 -name '*.[hcS]' -type f -print | sort \
1461 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1461 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1462 1462
1463 versioncheck: 1463 versioncheck:
1464 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1464 find $(srctree)/* $(RCS_FIND_IGNORE) \
1465 -name '*.[hcS]' -type f -print | sort \ 1465 -name '*.[hcS]' -type f -print | sort \
1466 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1466 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1467 1467
1468 coccicheck: 1468 coccicheck:
1469 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1469 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1470 1470
1471 namespacecheck: 1471 namespacecheck:
1472 $(PERL) $(srctree)/scripts/namespace.pl 1472 $(PERL) $(srctree)/scripts/namespace.pl
1473 1473
1474 export_report: 1474 export_report:
1475 $(PERL) $(srctree)/scripts/export_report.pl 1475 $(PERL) $(srctree)/scripts/export_report.pl
1476 1476
1477 endif #ifeq ($(config-targets),1) 1477 endif #ifeq ($(config-targets),1)
1478 endif #ifeq ($(mixed-targets),1) 1478 endif #ifeq ($(mixed-targets),1)
1479 1479
1480 PHONY += checkstack kernelrelease kernelversion image_name 1480 PHONY += checkstack kernelrelease kernelversion image_name
1481 1481
1482 # UML needs a little special treatment here. It wants to use the host 1482 # UML needs a little special treatment here. It wants to use the host
1483 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1483 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1484 # else wants $(ARCH), including people doing cross-builds, which means 1484 # else wants $(ARCH), including people doing cross-builds, which means
1485 # that $(SUBARCH) doesn't work here. 1485 # that $(SUBARCH) doesn't work here.
1486 ifeq ($(ARCH), um) 1486 ifeq ($(ARCH), um)
1487 CHECKSTACK_ARCH := $(SUBARCH) 1487 CHECKSTACK_ARCH := $(SUBARCH)
1488 else 1488 else
1489 CHECKSTACK_ARCH := $(ARCH) 1489 CHECKSTACK_ARCH := $(ARCH)
1490 endif 1490 endif
1491 checkstack: 1491 checkstack:
1492 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1492 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1493 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1493 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1494 1494
1495 kernelrelease: 1495 kernelrelease:
1496 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1496 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1497 1497
1498 kernelversion: 1498 kernelversion:
1499 @echo $(KERNELVERSION) 1499 @echo $(KERNELVERSION)
1500 1500
1501 image_name: 1501 image_name:
1502 @echo $(KBUILD_IMAGE) 1502 @echo $(KBUILD_IMAGE)
1503 1503
1504 # Clear a bunch of variables before executing the submake 1504 # Clear a bunch of variables before executing the submake
1505 tools/: FORCE 1505 tools/: FORCE
1506 $(Q)mkdir -p $(objtree)/tools 1506 $(Q)mkdir -p $(objtree)/tools
1507 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ 1507 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1508 1508
1509 tools/%: FORCE 1509 tools/%: FORCE
1510 $(Q)mkdir -p $(objtree)/tools 1510 $(Q)mkdir -p $(objtree)/tools
1511 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $* 1511 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1512 1512
1513 # Single targets 1513 # Single targets
1514 # --------------------------------------------------------------------------- 1514 # ---------------------------------------------------------------------------
1515 # Single targets are compatible with: 1515 # Single targets are compatible with:
1516 # - build with mixed source and output 1516 # - build with mixed source and output
1517 # - build with separate output dir 'make O=...' 1517 # - build with separate output dir 'make O=...'
1518 # - external modules 1518 # - external modules
1519 # 1519 #
1520 # target-dir => where to store outputfile 1520 # target-dir => where to store outputfile
1521 # build-dir => directory in kernel source tree to use 1521 # build-dir => directory in kernel source tree to use
1522 1522
1523 ifeq ($(KBUILD_EXTMOD),) 1523 ifeq ($(KBUILD_EXTMOD),)
1524 build-dir = $(patsubst %/,%,$(dir $@)) 1524 build-dir = $(patsubst %/,%,$(dir $@))
1525 target-dir = $(dir $@) 1525 target-dir = $(dir $@)
1526 else 1526 else
1527 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1527 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1528 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1528 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1529 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1529 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1530 endif 1530 endif
1531 1531
1532 %.s: %.c prepare scripts FORCE 1532 %.s: %.c prepare scripts FORCE
1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1534 %.i: %.c prepare scripts FORCE 1534 %.i: %.c prepare scripts FORCE
1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1536 %.o: %.c prepare scripts FORCE 1536 %.o: %.c prepare scripts FORCE
1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1538 %.lst: %.c prepare scripts FORCE 1538 %.lst: %.c prepare scripts FORCE
1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1540 %.s: %.S prepare scripts FORCE 1540 %.s: %.S prepare scripts FORCE
1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1542 %.o: %.S prepare scripts FORCE 1542 %.o: %.S prepare scripts FORCE
1543 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1543 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1544 %.symtypes: %.c prepare scripts FORCE 1544 %.symtypes: %.c prepare scripts FORCE
1545 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1545 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1546 1546
1547 # Modules 1547 # Modules
1548 /: prepare scripts FORCE 1548 /: prepare scripts FORCE
1549 $(cmd_crmodverdir) 1549 $(cmd_crmodverdir)
1550 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1550 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1551 $(build)=$(build-dir) 1551 $(build)=$(build-dir)
1552 # Make sure the latest headers are built for Documentation 1552 # Make sure the latest headers are built for Documentation
1553 Documentation/: headers_install 1553 Documentation/: headers_install
1554 %/: prepare scripts FORCE 1554 %/: prepare scripts FORCE
1555 $(cmd_crmodverdir) 1555 $(cmd_crmodverdir)
1556 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1556 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1557 $(build)=$(build-dir) 1557 $(build)=$(build-dir)
1558 %.ko: prepare scripts FORCE 1558 %.ko: prepare scripts FORCE
1559 $(cmd_crmodverdir) 1559 $(cmd_crmodverdir)
1560 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1560 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1561 $(build)=$(build-dir) $(@:.ko=.o) 1561 $(build)=$(build-dir) $(@:.ko=.o)
1562 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1562 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1563 1563
1564 # FIXME Should go into a make.lib or something 1564 # FIXME Should go into a make.lib or something
1565 # =========================================================================== 1565 # ===========================================================================
1566 1566
1567 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1567 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1568 cmd_rmdirs = rm -rf $(rm-dirs) 1568 cmd_rmdirs = rm -rf $(rm-dirs)
1569 1569
1570 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1570 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1571 cmd_rmfiles = rm -f $(rm-files) 1571 cmd_rmfiles = rm -f $(rm-files)
1572 1572
1573 # Run depmod only if we have System.map and depmod is executable 1573 # Run depmod only if we have System.map and depmod is executable
1574 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1574 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1575 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1575 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1576 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1576 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1577 1577
1578 # Create temporary dir for module support files 1578 # Create temporary dir for module support files
1579 # clean it up only when building all modules 1579 # clean it up only when building all modules
1580 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1580 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1581 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1581 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1582 1582
1583 # read all saved command lines 1583 # read all saved command lines
1584 1584
1585 targets := $(wildcard $(sort $(targets))) 1585 targets := $(wildcard $(sort $(targets)))
1586 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1586 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1587 1587
1588 ifneq ($(cmd_files),) 1588 ifneq ($(cmd_files),)
1589 $(cmd_files): ; # Do not try to update included dependency files 1589 $(cmd_files): ; # Do not try to update included dependency files
1590 include $(cmd_files) 1590 include $(cmd_files)
1591 endif 1591 endif
1592 1592
1593 endif # skip-makefile 1593 endif # skip-makefile
1594 1594
1595 PHONY += FORCE 1595 PHONY += FORCE
1596 FORCE: 1596 FORCE:
1597 1597
1598 # Declare the contents of the .PHONY variable as phony. We keep that 1598 # Declare the contents of the .PHONY variable as phony. We keep that
1599 # information in a variable so we can use it in if_changed and friends. 1599 # information in a variable so we can use it in if_changed and friends.
1600 .PHONY: $(PHONY) 1600 .PHONY: $(PHONY)
1601 1601