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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
c517d838 | 2 | VERSION = 4 |
2bd6bf03 | 3 | PATCHLEVEL = 14 |
55922c9d | 4 | SUBLEVEL = 0 |
bebc6082 | 5 | EXTRAVERSION = |
566cf877 | 6 | NAME = Fearless Coyote |
1da177e4 LT |
7 | |
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
a436bb7b MY |
14 | # o Do not use make's built-in rules and variables |
15 | # (this increases performance and avoids hard-to-debug behaviour); | |
16 | # o Look for make include files relative to root of kernel src | |
17 | MAKEFLAGS += -rR --include-dir=$(CURDIR) | |
1da177e4 | 18 | |
c051346b | 19 | # Avoid funny character set dependencies |
06b5dc64 | 20 | unexport LC_ALL |
c051346b PA |
21 | LC_COLLATE=C |
22 | LC_NUMERIC=C | |
07105202 | 23 | export LC_COLLATE LC_NUMERIC |
c051346b | 24 | |
ab7474ea BP |
25 | # Avoid interference with shell env settings |
26 | unexport GREP_OPTIONS | |
27 | ||
1da177e4 LT |
28 | # We are using a recursive build, so we need to do a little thinking |
29 | # to get the ordering right. | |
30 | # | |
31 | # Most importantly: sub-Makefiles should only ever modify files in | |
32 | # their own directory. If in some directory we have a dependency on | |
33 | # a file in another dir (which doesn't happen often, but it's often | |
34 | # unavoidable when linking the built-in.o targets which finally | |
35 | # turn into vmlinux), we will call a sub make in that other dir, and | |
36 | # after that we are sure that everything which is in that other dir | |
37 | # is now up to date. | |
38 | # | |
39 | # The only cases where we need to modify files which have global | |
40 | # effects are thus separated out and done before the recursive | |
41 | # descending is started. They are now explicitly listed as the | |
42 | # prepare rule. | |
43 | ||
066b7ed9 MM |
44 | # Beautify output |
45 | # --------------------------------------------------------------------------- | |
46 | # | |
47 | # Normally, we echo the whole command before executing it. By making | |
48 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
49 | # $(quiet) to choose other forms of output instead, e.g. | |
50 | # | |
51 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
52 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
53 | # | |
54 | # If $(quiet) is empty, the whole command will be printed. | |
55 | # If it is set to "quiet_", only the short version will be printed. | |
56 | # If it is set to "silent_", nothing will be printed at all, since | |
57 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
58 | # | |
59 | # A simple variant is to prefix commands with $(Q) - that's useful | |
60 | # for commands that shall be hidden in non-verbose mode. | |
61 | # | |
62 | # $(Q)ln $@ :< | |
63 | # | |
64 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
65 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
66 | # | |
1da177e4 LT |
67 | # To put more focus on warnings, be less verbose as default |
68 | # Use 'make V=1' to see the full commands | |
69 | ||
b8b0618c CR |
70 | ifeq ("$(origin V)", "command line") |
71 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
72 | endif |
73 | ifndef KBUILD_VERBOSE | |
74 | KBUILD_VERBOSE = 0 | |
75 | endif | |
76 | ||
066b7ed9 MM |
77 | ifeq ($(KBUILD_VERBOSE),1) |
78 | quiet = | |
79 | Q = | |
80 | else | |
81 | quiet=quiet_ | |
82 | Q = @ | |
83 | endif | |
84 | ||
85 | # If the user is running make -s (silent mode), suppress echoing of | |
86 | # commands | |
87 | ||
6f0fa58e | 88 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 | 89 | quiet=silent_ |
e572d088 | 90 | tools_silent=s |
066b7ed9 | 91 | endif |
066b7ed9 MM |
92 | |
93 | export quiet Q KBUILD_VERBOSE | |
94 | ||
1da177e4 LT |
95 | # kbuild supports saving output files in a separate directory. |
96 | # To locate output files in a separate directory two syntaxes are supported. | |
97 | # In both cases the working directory must be the root of the kernel src. | |
98 | # 1) O= | |
99 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 100 | # |
1da177e4 LT |
101 | # 2) Set KBUILD_OUTPUT |
102 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
103 | # where the output files shall be placed. | |
104 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
105 | # make | |
106 | # | |
107 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
108 | # variable. | |
109 | ||
c4e6fff1 C |
110 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
111 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
1da177e4 LT |
112 | ifeq ($(KBUILD_SRC),) |
113 | ||
114 | # OK, Make called in directory where kernel src resides | |
115 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
116 | ifeq ("$(origin O)", "command line") |
117 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
118 | endif |
119 | ||
120 | # That's our default target when none is given on the command line | |
4f193362 | 121 | PHONY := _all |
1da177e4 LT |
122 | _all: |
123 | ||
1cacc9ab SR |
124 | # Cancel implicit rules on top Makefile |
125 | $(CURDIR)/Makefile Makefile: ; | |
126 | ||
51193b76 RJ |
127 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
128 | $(error main directory cannot contain spaces nor colons) | |
129 | endif | |
130 | ||
1da177e4 | 131 | ifneq ($(KBUILD_OUTPUT),) |
1da177e4 LT |
132 | # check that the output directory actually exists |
133 | saved-output := $(KBUILD_OUTPUT) | |
028568d8 MY |
134 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
135 | && /bin/pwd) | |
1da177e4 | 136 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 137 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 138 | |
0b35786d MM |
139 | PHONY += $(MAKECMDGOALS) sub-make |
140 | ||
1cacc9ab | 141 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 142 | @: |
0b35786d | 143 | |
c4e6fff1 | 144 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 145 | sub-make: |
745a2543 | 146 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
aa55c8e2 | 147 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 LT |
148 | |
149 | # Leave processing to above invocation of make | |
150 | skip-makefile := 1 | |
151 | endif # ifneq ($(KBUILD_OUTPUT),) | |
152 | endif # ifeq ($(KBUILD_SRC),) | |
153 | ||
154 | # We process the rest of the Makefile if this is the final invocation of make | |
155 | ifeq ($(skip-makefile),) | |
156 | ||
7ff52571 MY |
157 | # Do not print "Entering directory ...", |
158 | # but we want to display it when entering to the output directory | |
159 | # so that IDEs/editors are able to understand relative filenames. | |
160 | MAKEFLAGS += --no-print-directory | |
161 | ||
aa55c8e2 MY |
162 | # Call a source code checker (by default, "sparse") as part of the |
163 | # C compilation. | |
164 | # | |
165 | # Use 'make C=1' to enable checking of only re-compiled files. | |
166 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
167 | # of whether they are re-compiled or not. | |
168 | # | |
036db11c C |
169 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
170 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
171 | |
172 | ifeq ("$(origin C)", "command line") | |
173 | KBUILD_CHECKSRC = $(C) | |
174 | endif | |
175 | ifndef KBUILD_CHECKSRC | |
176 | KBUILD_CHECKSRC = 0 | |
177 | endif | |
178 | ||
179 | # Use make M=dir to specify directory of external module to build | |
180 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
181 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
182 | ifdef SUBDIRS | |
183 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
184 | endif | |
185 | ||
186 | ifeq ("$(origin M)", "command line") | |
187 | KBUILD_EXTMOD := $(M) | |
188 | endif | |
189 | ||
1da177e4 LT |
190 | # If building an external module we do not care about the all: rule |
191 | # but instead _all depend on modules | |
4f193362 | 192 | PHONY += all |
1da177e4 LT |
193 | ifeq ($(KBUILD_EXTMOD),) |
194 | _all: all | |
195 | else | |
196 | _all: modules | |
197 | endif | |
198 | ||
9da0763b MM |
199 | ifeq ($(KBUILD_SRC),) |
200 | # building in the source tree | |
201 | srctree := . | |
202 | else | |
203 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
204 | # building in a subdirectory of the source tree | |
205 | srctree := .. | |
206 | else | |
207 | srctree := $(KBUILD_SRC) | |
208 | endif | |
209 | endif | |
7e1c0477 | 210 | objtree := . |
1da177e4 LT |
211 | src := $(srctree) |
212 | obj := $(objtree) | |
213 | ||
0f558c33 | 214 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 | 215 | |
11294235 | 216 | export srctree objtree VPATH |
1da177e4 | 217 | |
1da177e4 LT |
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 | |
220 | # line overrides the setting of ARCH below. If a native build is happening, | |
38385f8f | 221 | # then ARCH is assigned, getting whatever value it gets normally, and |
1da177e4 LT |
222 | # SUBARCH is subsequently ignored. |
223 | ||
ffee0de4 DW |
224 | SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ |
225 | -e s/sun4u/sparc64/ \ | |
1da177e4 | 226 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
39990b5e | 227 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
236b1957 | 228 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
fbe934d6 PD |
229 | -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ |
230 | -e s/riscv.*/riscv/) | |
1da177e4 LT |
231 | |
232 | # Cross compiling and selecting different set of gcc/bin-utils | |
233 | # --------------------------------------------------------------------------- | |
234 | # | |
235 | # When performing cross compilation for other architectures ARCH shall be set | |
236 | # to the target architecture. (See arch/* for the possibilities). | |
237 | # ARCH can be set during invocation of make: | |
238 | # make ARCH=ia64 | |
239 | # Another way is to have ARCH set in the environment. | |
240 | # The default ARCH is the host where make is executed. | |
241 | ||
242 | # CROSS_COMPILE specify the prefix used for all executables used | |
243 | # during compilation. Only gcc and related bin-utils executables | |
244 | # are prefixed with $(CROSS_COMPILE). | |
245 | # CROSS_COMPILE can be set on the command line | |
246 | # make CROSS_COMPILE=ia64-linux- | |
247 | # Alternatively CROSS_COMPILE can be set in the environment. | |
84336466 RM |
248 | # A third alternative is to store a setting in .config so that plain |
249 | # "make" in the configured kernel build directory always uses that. | |
1da177e4 LT |
250 | # Default value for CROSS_COMPILE is not to prefix executables |
251 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 252 | ARCH ?= $(SUBARCH) |
84336466 | 253 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) |
1da177e4 LT |
254 | |
255 | # Architecture as present in compile.h | |
6752ed90 TG |
256 | UTS_MACHINE := $(ARCH) |
257 | SRCARCH := $(ARCH) | |
1da177e4 | 258 | |
d746d647 SR |
259 | # Additional ARCH settings for x86 |
260 | ifeq ($(ARCH),i386) | |
261 | SRCARCH := x86 | |
262 | endif | |
263 | ifeq ($(ARCH),x86_64) | |
264 | SRCARCH := x86 | |
265 | endif | |
74b469f2 | 266 | |
5e538790 | 267 | # Additional ARCH settings for sparc |
e69f58c0 NK |
268 | ifeq ($(ARCH),sparc32) |
269 | SRCARCH := sparc | |
270 | endif | |
a439fe51 | 271 | ifeq ($(ARCH),sparc64) |
5e538790 | 272 | SRCARCH := sparc |
a439fe51 | 273 | endif |
2fb9b1bd | 274 | |
3cc000b5 PM |
275 | # Additional ARCH settings for sh |
276 | ifeq ($(ARCH),sh64) | |
277 | SRCARCH := sh | |
278 | endif | |
279 | ||
18aecc2b | 280 | # Additional ARCH settings for tile |
6738d321 CM |
281 | ifeq ($(ARCH),tilepro) |
282 | SRCARCH := tile | |
283 | endif | |
18aecc2b CM |
284 | ifeq ($(ARCH),tilegx) |
285 | SRCARCH := tile | |
286 | endif | |
287 | ||
5e538790 SR |
288 | # Where to locate arch specific headers |
289 | hdr-arch := $(SRCARCH) | |
290 | ||
14cdd3c4 | 291 | KCONFIG_CONFIG ?= .config |
41263fc6 | 292 | export KCONFIG_CONFIG |
14cdd3c4 | 293 | |
1da177e4 LT |
294 | # SHELL used by kbuild |
295 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
296 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
297 | else echo sh; fi ; fi) | |
298 | ||
d7f14c66 UKK |
299 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS) |
300 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS) | |
301 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS) | |
302 | ||
070b98bf SR |
303 | HOSTCC = gcc |
304 | HOSTCXX = g++ | |
d7f14c66 UKK |
305 | HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
306 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) | |
307 | HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) | |
308 | HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) | |
309 | HOST_LOADLIBES := $(HOST_LFS_LIBS) | |
1da177e4 | 310 | |
61163efa BW |
311 | ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) |
312 | HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ | |
313 | -Wno-missing-field-initializers -fno-delete-null-pointer-checks | |
314 | endif | |
315 | ||
070b98bf SR |
316 | # Decide whether to build built-in, modular, or both. |
317 | # Normally, just do built-in. | |
1da177e4 LT |
318 | |
319 | KBUILD_MODULES := | |
320 | KBUILD_BUILTIN := 1 | |
321 | ||
3fbb43df MY |
322 | # If we have only "make modules", don't compile built-in objects. |
323 | # When we're building modules with modversions, we need to consider | |
324 | # the built-in objects during the descend as well, in order to | |
325 | # make sure the checksums are up to date before we record them. | |
1da177e4 LT |
326 | |
327 | ifeq ($(MAKECMDGOALS),modules) | |
328 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
329 | endif | |
330 | ||
3fbb43df MY |
331 | # If we have "make <whatever> modules", compile modules |
332 | # in addition to whatever we do anyway. | |
333 | # Just "make" or "make all" shall build modules as well | |
1da177e4 LT |
334 | |
335 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
336 | KBUILD_MODULES := 1 | |
337 | endif | |
338 | ||
339 | ifeq ($(MAKECMDGOALS),) | |
340 | KBUILD_MODULES := 1 | |
341 | endif | |
342 | ||
e579d351 | 343 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
344 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
345 | ||
1cacc9ab | 346 | # We need some generic definitions (do not try to remake the file). |
a436bb7b MY |
347 | scripts/Kbuild.include: ; |
348 | include scripts/Kbuild.include | |
1da177e4 LT |
349 | |
350 | # Make variables (CC, etc...) | |
1da177e4 LT |
351 | AS = $(CROSS_COMPILE)as |
352 | LD = $(CROSS_COMPILE)ld | |
353 | CC = $(CROSS_COMPILE)gcc | |
354 | CPP = $(CC) -E | |
355 | AR = $(CROSS_COMPILE)ar | |
356 | NM = $(CROSS_COMPILE)nm | |
357 | STRIP = $(CROSS_COMPILE)strip | |
358 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
359 | OBJDUMP = $(CROSS_COMPILE)objdump | |
360 | AWK = awk | |
361 | GENKSYMS = scripts/genksyms/genksyms | |
caa27b66 | 362 | INSTALLKERNEL := installkernel |
1da177e4 | 363 | DEPMOD = /sbin/depmod |
1da177e4 | 364 | PERL = perl |
011bf125 | 365 | PYTHON = python |
1da177e4 LT |
366 | CHECK = sparse |
367 | ||
80a7d1d9 HE |
368 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
369 | -Wbitwise -Wno-return-void $(CF) | |
b36fad65 | 370 | NOSTDINC_FLAGS = |
6588169d SR |
371 | CFLAGS_MODULE = |
372 | AFLAGS_MODULE = | |
373 | LDFLAGS_MODULE = | |
1da177e4 LT |
374 | CFLAGS_KERNEL = |
375 | AFLAGS_KERNEL = | |
b36fad65 | 376 | LDFLAGS_vmlinux = |
b334e19a | 377 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) |
543c37cb | 378 | CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) |
1da177e4 LT |
379 | |
380 | ||
abbf1590 DH |
381 | # Use USERINCLUDE when you must reference the UAPI directories only. |
382 | USERINCLUDE := \ | |
383 | -I$(srctree)/arch/$(hdr-arch)/include/uapi \ | |
3308b285 | 384 | -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ |
abbf1590 | 385 | -I$(srctree)/include/uapi \ |
3308b285 | 386 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
387 | -include $(srctree)/include/linux/kconfig.h |
388 | ||
1da177e4 LT |
389 | # Use LINUXINCLUDE when you must reference the include/ directory. |
390 | # Needed to be compatible with the O= option | |
abbf1590 DH |
391 | LINUXINCLUDE := \ |
392 | -I$(srctree)/arch/$(hdr-arch)/include \ | |
3308b285 | 393 | -I$(objtree)/arch/$(hdr-arch)/include/generated \ |
abbf1590 | 394 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
f8224f7f MY |
395 | -I$(objtree)/include \ |
396 | $(USERINCLUDE) | |
1da177e4 | 397 | |
d8672b40 | 398 | KBUILD_CPPFLAGS := -D__KERNEL__ |
1da177e4 | 399 | |
a0f97e06 | 400 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
8c97023c | 401 | -fno-strict-aliasing -fno-common -fshort-wchar \ |
a8735821 | 402 | -Werror-implicit-function-declaration \ |
51b97e35 | 403 | -Wno-format-security \ |
c6a38553 BP |
404 | -std=gnu89 $(call cc-option,-fno-PIE) |
405 | ||
a1c48bb1 | 406 | |
80c00ba9 SR |
407 | KBUILD_AFLAGS_KERNEL := |
408 | KBUILD_CFLAGS_KERNEL := | |
c6a38553 | 409 | KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) |
6588169d SR |
410 | KBUILD_AFLAGS_MODULE := -DMODULE |
411 | KBUILD_CFLAGS_MODULE := -DMODULE | |
412 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
1da177e4 | 413 | |
f1d28fb0 RZ |
414 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
415 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
cacd54ef | 416 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
cb58455c | 417 | |
070b98bf | 418 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
80ef88d6 | 419 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
d7f14c66 | 420 | export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES |
011bf125 | 421 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE |
070b98bf | 422 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 423 | |
06c5040c | 424 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
5c9a8750 | 425 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN |
222d394d | 426 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 427 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 428 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 429 | export KBUILD_ARFLAGS |
1da177e4 LT |
430 | |
431 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
432 | # tree rather than in the kernel tree. The kernel tree might | |
433 | # even be read-only. | |
434 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
435 | ||
1da177e4 LT |
436 | # Files to ignore in find ... statements |
437 | ||
ae63b2d7 PB |
438 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
439 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
440 | -prune -o | |
450c6076 JJ |
441 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
442 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
443 | |
444 | # =========================================================================== | |
445 | # Rules shared between *config targets and build targets | |
446 | ||
312a3d09 | 447 | # Basic helpers built in scripts/basic/ |
4f193362 | 448 | PHONY += scripts_basic |
1da177e4 LT |
449 | scripts_basic: |
450 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 451 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 452 | |
cd05e6bd JB |
453 | # To avoid any implicit rule to kick in, define an empty command. |
454 | scripts/basic/%: scripts_basic ; | |
455 | ||
4f193362 | 456 | PHONY += outputmakefile |
fd5f0cd6 JB |
457 | # outputmakefile generates a Makefile in the output directory, if using a |
458 | # separate output directory. This allows convenient use of make in the | |
459 | # output directory. | |
1da177e4 | 460 | outputmakefile: |
fd5f0cd6 | 461 | ifneq ($(KBUILD_SRC),) |
92979997 | 462 | $(Q)ln -fsn $(srctree) source |
fd5f0cd6 JB |
463 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
464 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
465 | endif | |
1da177e4 | 466 | |
d8ecc5cd | 467 | # Support for using generic headers in asm-generic |
a9d9a400 MY |
468 | PHONY += asm-generic uapi-asm-generic |
469 | asm-generic: uapi-asm-generic | |
d8ecc5cd | 470 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
3c5994c8 | 471 | src=asm obj=arch/$(SRCARCH)/include/generated/asm |
a9d9a400 | 472 | uapi-asm-generic: |
3c5994c8 CM |
473 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
474 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm | |
d8ecc5cd | 475 | |
1da177e4 LT |
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 | |
478 | # It is allowed to specify more targets when calling make, including | |
479 | # mixing *config targets and build targets. | |
070b98bf | 480 | # For example 'make oldconfig all'. |
1da177e4 LT |
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). | |
483 | ||
10b63956 | 484 | version_h := include/generated/uapi/linux/version.h |
223c24a7 | 485 | old_version_h := include/linux/version.h |
d183e6f5 | 486 | |
3eb3c740 | 487 | no-dot-config-targets := clean mrproper distclean \ |
fbae4d58 | 488 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
d183e6f5 | 489 | $(version_h) headers_% archheaders archscripts \ |
4aed2fd8 | 490 | kernelversion %src-pkg |
1da177e4 LT |
491 | |
492 | config-targets := 0 | |
493 | mixed-targets := 0 | |
494 | dot-config := 1 | |
495 | ||
496 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
497 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
498 | dot-config := 0 | |
499 | endif | |
500 | endif | |
501 | ||
502 | ifeq ($(KBUILD_EXTMOD),) | |
503 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
504 | config-targets := 1 | |
d0d38cd9 | 505 | ifneq ($(words $(MAKECMDGOALS)),1) |
1da177e4 LT |
506 | mixed-targets := 1 |
507 | endif | |
508 | endif | |
509 | endif | |
312a3d09 | 510 | # install and modules_install need also be processed one by one |
a85a41ed MM |
511 | ifneq ($(filter install,$(MAKECMDGOALS)),) |
512 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
513 | mixed-targets := 1 | |
514 | endif | |
515 | endif | |
1da177e4 LT |
516 | |
517 | ifeq ($(mixed-targets),1) | |
518 | # =========================================================================== | |
519 | # We're called with mixed targets (*config and build targets). | |
520 | # Handle them one by one. | |
521 | ||
9319f453 MY |
522 | PHONY += $(MAKECMDGOALS) __build_one_by_one |
523 | ||
524 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
525 | @: | |
526 | ||
527 | __build_one_by_one: | |
528 | $(Q)set -e; \ | |
529 | for i in $(MAKECMDGOALS); do \ | |
530 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
531 | done | |
1da177e4 LT |
532 | |
533 | else | |
534 | ifeq ($(config-targets),1) | |
535 | # =========================================================================== | |
536 | # *config targets only - make sure prerequisites are updated, and descend | |
537 | # in scripts/kconfig to make the *config target | |
538 | ||
539 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
540 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
541 | # used for 'make defconfig' | |
a436bb7b | 542 | include arch/$(SRCARCH)/Makefile |
61bee204 | 543 | export KBUILD_DEFCONFIG KBUILD_KCONFIG |
1da177e4 | 544 | |
31110ebb | 545 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
546 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
547 | ||
548 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
549 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
550 | ||
551 | else | |
552 | # =========================================================================== | |
553 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
554 | # targets and others. In general all targets except *config targets. | |
555 | ||
556 | ifeq ($(KBUILD_EXTMOD),) | |
557 | # Additional helpers built in scripts/ | |
558 | # Carefully list dependencies so we do not try to build scripts twice | |
070b98bf | 559 | # in parallel |
4f193362 | 560 | PHONY += scripts |
a54292f5 | 561 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ |
6b90bd4b | 562 | asm-generic gcc-plugins |
1da177e4 LT |
563 | $(Q)$(MAKE) $(build)=$(@) |
564 | ||
1da177e4 LT |
565 | # Objects we will link into vmlinux / subdirs we need to visit |
566 | init-y := init/ | |
df85b2d7 | 567 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
568 | net-y := net/ |
569 | libs-y := lib/ | |
570 | core-y := usr/ | |
37d9fe47 | 571 | virt-y := virt/ |
1da177e4 LT |
572 | endif # KBUILD_EXTMOD |
573 | ||
574 | ifeq ($(dot-config),1) | |
9ee4e336 SR |
575 | # Read in config |
576 | -include include/config/auto.conf | |
1da177e4 | 577 | |
9ee4e336 | 578 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
579 | # Read in dependencies to all Kconfig* files, make sure to run |
580 | # oldconfig if changes are detected. | |
c955ccaf | 581 | -include include/config/auto.conf.cmd |
1da177e4 | 582 | |
1da177e4 | 583 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 584 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 585 | |
c955ccaf | 586 | # If .config is newer than include/config/auto.conf, someone tinkered |
752625cf | 587 | # with it and forgot to run make oldconfig. |
070b98bf | 588 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
752625cf | 589 | # we execute the config step to be sure to catch updated Kconfig files |
bc081dd6 | 590 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
1da177e4 | 591 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
3041e47e | 592 | else |
264a2683 | 593 | # external modules needs include/generated/autoconf.h and include/config/auto.conf |
9ee4e336 SR |
594 | # but do not care if they are up-to-date. Use auto.conf to trigger the test |
595 | PHONY += include/config/auto.conf | |
596 | ||
597 | include/config/auto.conf: | |
264a2683 | 598 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
599 | echo >&2; \ |
600 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
601 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
602 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
603 | echo >&2 ; \ | |
9ee4e336 SR |
604 | /bin/false) |
605 | ||
606 | endif # KBUILD_EXTMOD | |
c955ccaf | 607 | |
1da177e4 LT |
608 | else |
609 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 610 | include/config/auto.conf: ; |
9ee4e336 | 611 | endif # $(dot-config) |
1da177e4 | 612 | |
86556392 NP |
613 | # For the kernel to actually contain only the needed exported symbols, |
614 | # we have to build modules as well to determine what those symbols are. | |
615 | # (this can be evaluated only once include/config/auto.conf has been included) | |
616 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
617 | KBUILD_MODULES := 1 | |
618 | endif | |
619 | ||
1da177e4 LT |
620 | # The all: target is the default when no target is given on the |
621 | # command line. | |
622 | # This allow a user to issue only 'make' to build a kernel including modules | |
c8447161 | 623 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
1da177e4 LT |
624 | all: vmlinux |
625 | ||
6dd3f13e MM |
626 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
627 | # values of the respective KBUILD_* variables | |
628 | ARCH_CPPFLAGS := | |
629 | ARCH_AFLAGS := | |
630 | ARCH_CFLAGS := | |
a436bb7b | 631 | include arch/$(SRCARCH)/Makefile |
a1c48bb1 GU |
632 | |
633 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
ef6000b4 | 634 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
635 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
636 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
637 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
a1c48bb1 | 638 | |
1da177e4 | 639 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
6748cb3c BW |
640 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
641 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) | |
1da177e4 | 642 | else |
815eb71e | 643 | ifdef CONFIG_PROFILE_ALL_BRANCHES |
a76bcf55 | 644 | KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
815eb71e AB |
645 | else |
646 | KBUILD_CFLAGS += -O2 | |
647 | endif | |
1da177e4 LT |
648 | endif |
649 | ||
a76bcf55 AB |
650 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
651 | $(call cc-disable-warning,maybe-uninitialized,)) | |
652 | ||
69102311 JK |
653 | # Tell gcc to never replace conditional load with a non-conditional one |
654 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
655 | ||
7292ae3d GFM |
656 | # check for 'asm goto' |
657 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) | |
658 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
659 | KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO | |
660 | endif | |
661 | ||
6b90bd4b ER |
662 | include scripts/Makefile.gcc-plugins |
663 | ||
1873e870 AK |
664 | ifdef CONFIG_READABLE_ASM |
665 | # Disable optimizations that make assembler listings hard to read. | |
666 | # reorder blocks reorders the control in the function | |
667 | # ipa clone creates specialized cloned functions | |
668 | # partial inlining inlines only parts of functions | |
669 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
670 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
671 | $(call cc-option,-fno-partial-inlining) | |
672 | endif | |
673 | ||
08f67461 | 674 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
675 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
676 | endif | |
677 | ||
c965b105 KC |
678 | # This selects the stack protector compiler flag. Testing it is delayed |
679 | # until after .config has been reprocessed, in the prepare-compiler-check | |
680 | # target. | |
8779657d | 681 | ifdef CONFIG_CC_STACKPROTECTOR_REGULAR |
19952a92 | 682 | stackp-flag := -fstack-protector |
c965b105 | 683 | stackp-name := REGULAR |
6c15b327 JB |
684 | else |
685 | ifdef CONFIG_CC_STACKPROTECTOR_STRONG | |
8779657d | 686 | stackp-flag := -fstack-protector-strong |
c965b105 | 687 | stackp-name := STRONG |
19952a92 KC |
688 | else |
689 | # Force off for distro compilers that enable stack protector by default. | |
690 | stackp-flag := $(call cc-option, -fno-stack-protector) | |
5d707e9c | 691 | endif |
6c15b327 | 692 | endif |
c965b105 KC |
693 | # Find arch-specific stack protector compiler sanity-checking script. |
694 | ifdef CONFIG_CC_STACKPROTECTOR | |
228d96c6 KC |
695 | stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh |
696 | stackp-check := $(wildcard $(stackp-path)) | |
c965b105 | 697 | endif |
19952a92 | 698 | KBUILD_CFLAGS += $(stackp-flag) |
e06b8b98 | 699 | |
5631d9c4 | 700 | ifeq ($(cc-name),clang) |
785f11aa | 701 | ifneq ($(CROSS_COMPILE),) |
bb3f38c3 | 702 | CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
785f11aa BW |
703 | GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) |
704 | endif | |
705 | ifneq ($(GCC_TOOLCHAIN),) | |
bb3f38c3 | 706 | CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) |
785f11aa BW |
707 | endif |
708 | KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) | |
709 | KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) | |
61163efa | 710 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
61163efa BW |
711 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) |
712 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) | |
713 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
bfb38988 | 714 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
61163efa BW |
715 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
716 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
717 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
718 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
719 | # See modpost pattern 2 | |
720 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
26ea6bb1 | 721 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) |
a37c45cd MD |
722 | KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) |
723 | KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) | |
61163efa BW |
724 | else |
725 | ||
c9c6837d | 726 | # These warnings generated too much noise in a regular build. |
35288e30 | 727 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) |
8417da6f | 728 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |
c9c6837d | 729 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
61163efa | 730 | endif |
af0e5d56 | 731 | |
1da177e4 | 732 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 733 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 734 | else |
7e9501fd RV |
735 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
736 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
737 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
738 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
739 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
740 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 741 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 742 | endif |
7e9501fd | 743 | endif |
1da177e4 | 744 | |
2062afb4 LT |
745 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
746 | ||
1da177e4 | 747 | ifdef CONFIG_DEBUG_INFO |
866ced95 AK |
748 | ifdef CONFIG_DEBUG_INFO_SPLIT |
749 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) | |
750 | else | |
a0f97e06 | 751 | KBUILD_CFLAGS += -g |
866ced95 | 752 | endif |
2288328c | 753 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 754 | endif |
bfaf2dd3 AK |
755 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
756 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) | |
757 | endif | |
1da177e4 | 758 | |
d6f4ceb7 | 759 | ifdef CONFIG_DEBUG_INFO_REDUCED |
e82c4bb8 AK |
760 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
761 | $(call cc-option,-fno-var-tracking) | |
d6f4ceb7 AK |
762 | endif |
763 | ||
606576ce | 764 | ifdef CONFIG_FUNCTION_TRACER |
c0a80c0c HC |
765 | ifndef CC_FLAGS_FTRACE |
766 | CC_FLAGS_FTRACE := -pg | |
767 | endif | |
768 | export CC_FLAGS_FTRACE | |
a2546fae SR |
769 | ifdef CONFIG_HAVE_FENTRY |
770 | CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) | |
771 | endif | |
c0a80c0c | 772 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) |
a2546fae | 773 | KBUILD_AFLAGS += $(CC_USING_FENTRY) |
72441cb1 | 774 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 775 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
776 | BUILD_C_RECORDMCOUNT := y |
777 | export BUILD_C_RECORDMCOUNT | |
778 | endif | |
779 | endif | |
16444a8a ACM |
780 | endif |
781 | ||
91341d4b SR |
782 | # We trigger additional mismatches with less inlining |
783 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
784 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
785 | endif | |
786 | ||
90ad4052 MY |
787 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
788 | KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) | |
789 | KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) | |
790 | endif | |
791 | ||
e8e69931 | 792 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 793 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
794 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
795 | ||
1da177e4 | 796 | # warn about C99 declaration after statement |
a0f97e06 | 797 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
1da177e4 | 798 | |
070b98bf | 799 | # disable pointer signed / unsigned warnings in gcc 4.0 |
8417da6f | 800 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
1da177e4 | 801 | |
fe8d0a41 | 802 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 803 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 804 | |
8f7f5c9f AK |
805 | # conserve stack if available |
806 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
807 | ||
80970472 ST |
808 | # disallow errors like 'EXPORT_GPL(foo);' with missing header |
809 | KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) | |
810 | ||
811 | # require functions to have arguments in prototypes, not empty 'int foo()' | |
812 | KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) | |
813 | ||
fe7c36c7 JT |
814 | # Prohibit date/time macros, which would make the build non-deterministic |
815 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
816 | ||
ea8daa7b DW |
817 | # enforce correct pointer usage |
818 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
819 | ||
c834f0e8 KC |
820 | # Require designated initializers for all marked structures |
821 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
822 | ||
40df759e MM |
823 | # use the deterministic mode of AR if available |
824 | KBUILD_ARFLAGS := $(call ar-option,D) | |
825 | ||
a436bb7b MY |
826 | include scripts/Makefile.kasan |
827 | include scripts/Makefile.extrawarn | |
c6d30853 | 828 | include scripts/Makefile.ubsan |
a86fe353 | 829 | |
61754c18 MM |
830 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
831 | # last assignments | |
832 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
833 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
834 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 835 | |
18991197 | 836 | # Use --build-id when available. |
bd74370b | 837 | LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\ |
f86fd306 | 838 | $(call cc-ldoption, -Wl$(comma)--build-id,)) |
6588169d | 839 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
840 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
841 | ||
b67067f1 NP |
842 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
843 | LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) | |
844 | endif | |
845 | ||
5d7d18f5 | 846 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 847 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
848 | endif |
849 | ||
1da177e4 | 850 | # Default kernel image to build when no specific target is given. |
070b98bf | 851 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
852 | # set in the environment |
853 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
854 | # this default value | |
855 | export KBUILD_IMAGE ?= vmlinux | |
856 | ||
857 | # | |
858 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
859 | # images. Default is /boot, but you can set it to other values | |
860 | export INSTALL_PATH ?= /boot | |
861 | ||
f4d4ffc0 JC |
862 | # |
863 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
864 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
865 | # an argument if needed. Otherwise it defaults to the kernel install path | |
866 | # | |
867 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
868 | ||
1da177e4 LT |
869 | # |
870 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
871 | # relocations required by build roots. This is not defined in the | |
070b98bf | 872 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
873 | # |
874 | ||
df9df036 | 875 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
876 | export MODLIB |
877 | ||
ac031f26 | 878 | # |
3fbb43df MY |
879 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
880 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
881 | # the default option --strip-debug will be used. Otherwise, | |
882 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 883 | |
ac031f26 TT |
884 | ifdef INSTALL_MOD_STRIP |
885 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 886 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 887 | else |
2ea03891 | 888 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
889 | endif # INSTALL_MOD_STRIP=1 |
890 | else | |
2ea03891 | 891 | mod_strip_cmd = true |
ac031f26 TT |
892 | endif # INSTALL_MOD_STRIP |
893 | export mod_strip_cmd | |
894 | ||
beb50df3 BJ |
895 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
896 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
897 | # or CONFIG_MODULE_COMPRESS_XZ. | |
898 | ||
899 | mod_compress_cmd = true | |
900 | ifdef CONFIG_MODULE_COMPRESS | |
901 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 902 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
903 | endif # CONFIG_MODULE_COMPRESS_GZIP |
904 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 905 | mod_compress_cmd = xz -f |
beb50df3 BJ |
906 | endif # CONFIG_MODULE_COMPRESS_XZ |
907 | endif # CONFIG_MODULE_COMPRESS | |
908 | export mod_compress_cmd | |
909 | ||
1bf49dd4 | 910 | # Select initial ramdisk compression format, default is gzip(1). |
911 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
912 | # | |
7ac18156 JB |
913 | INITRD_COMPRESS-y := gzip |
914 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
915 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
916 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
917 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
918 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
b7000ade LT |
919 | # do not export INITRD_COMPRESS, since we didn't actually |
920 | # choose a sane default compression above. | |
921 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
1da177e4 | 922 | |
d9d8d7ed | 923 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
924 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
925 | ||
926 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
927 | else |
928 | mod_sign_cmd = true | |
929 | endif | |
930 | export mod_sign_cmd | |
931 | ||
9f0c18ae JP |
932 | ifdef CONFIG_STACK_VALIDATION |
933 | has_libelf := $(call try-run,\ | |
934 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) | |
935 | ifeq ($(has_libelf),1) | |
936 | objtool_target := tools/objtool FORCE | |
937 | else | |
11af8474 JP |
938 | ifdef CONFIG_UNWINDER_ORC |
939 | $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") | |
3dd40cb3 JP |
940 | else |
941 | $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") | |
942 | endif | |
9f0c18ae JP |
943 | SKIP_STACK_VALIDATION := 1 |
944 | export SKIP_STACK_VALIDATION | |
945 | endif | |
946 | endif | |
947 | ||
e2a666d5 | 948 | |
1da177e4 | 949 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 950 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
951 | |
952 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
953 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 954 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 LT |
955 | |
956 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
37d9fe47 | 957 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
1da177e4 LT |
958 | |
959 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
960 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
961 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
962 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
963 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
3a166fc2 | 964 | libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y))) |
37d9fe47 | 965 | virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) |
1da177e4 | 966 | |
1f2bfbd0 | 967 | # Externally visible symbols (used by link-vmlinux.sh) |
95698570 | 968 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) |
3a166fc2 NP |
969 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) |
970 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
95698570 | 971 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 972 | export LDFLAGS_vmlinux |
312a3d09 | 973 | # used by scripts/package/Makefile |
37d9fe47 | 974 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
9bb48247 | 975 | |
3a166fc2 | 976 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 977 | |
2441e78b NP |
978 | # Include targets which we want to execute sequentially if the rest of the |
979 | # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be | |
980 | # evaluated more than once. | |
981 | PHONY += vmlinux_prereq | |
982 | vmlinux_prereq: $(vmlinux-deps) FORCE | |
0f836e5f | 983 | ifdef CONFIG_HEADERS_CHECK |
0e7af8d0 | 984 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
267c4025 | 985 | endif |
3ee7b3fa | 986 | ifdef CONFIG_GDB_SCRIPTS |
8e9b4667 | 987 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
0f836e5f | 988 | endif |
2441e78b | 989 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
ba79d401 | 990 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 991 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 992 | endif |
23121ca2 NP |
993 | |
994 | # standalone target for easier testing | |
995 | include/generated/autoksyms.h: FORCE | |
ba79d401 | 996 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true |
23121ca2 | 997 | |
fbe6e37d NP |
998 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
999 | ||
1000 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 C |
1001 | cmd_link-vmlinux = \ |
1002 | $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
fbe6e37d | 1003 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1004 | |
edf69470 | 1005 | vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE |
1f2bfbd0 | 1006 | +$(call if_changed,link-vmlinux) |
741f98fe | 1007 | |
dd92478a NP |
1008 | # Build samples along the rest of the kernel |
1009 | ifdef CONFIG_SAMPLES | |
1010 | vmlinux-dirs += samples | |
1011 | endif | |
1012 | ||
38385f8f | 1013 | # The actual objects are generated when descending, |
1da177e4 | 1014 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1015 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1016 | |
1017 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1018 | # Preset locale variables to speed up the build process. Limit locale | |
1019 | # tweaks to this spot to avoid wrong language settings when running | |
1020 | # make menuconfig etc. | |
1021 | # Error messages still appears in the original language | |
1022 | ||
4f193362 | 1023 | PHONY += $(vmlinux-dirs) |
5bb78269 | 1024 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
1025 | $(Q)$(MAKE) $(build)=$@ |
1026 | ||
0d0e7718 MM |
1027 | define filechk_kernel.release |
1028 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1029 | endef | |
1030 | ||
83a35e36 | 1031 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
f1d28fb0 | 1032 | include/config/kernel.release: include/config/auto.conf FORCE |
0d0e7718 | 1033 | $(call filechk,kernel.release) |
cb58455c SR |
1034 | |
1035 | ||
1da177e4 | 1036 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1037 | # or the modules are listed in "prepare". |
1038 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1039 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1040 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1041 | |
5bb78269 | 1042 | # Listed in dependency order |
4f193362 | 1043 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 | 1044 | |
86feeaa8 | 1045 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1046 | # and if so do: |
1047 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1048 | prepare3: include/config/kernel.release |
1da177e4 | 1049 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 1050 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 1051 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
1052 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
1053 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
1054 | /bin/false; \ |
1055 | fi; | |
1da177e4 LT |
1056 | endif |
1057 | ||
c965b105 KC |
1058 | # prepare2 creates a makefile if using a separate output directory. |
1059 | # From this point forward, .config has been reprocessed, so any rules | |
1060 | # that need to depend on updated CONFIG_* values can be checked here. | |
1061 | prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic | |
1da177e4 | 1062 | |
d183e6f5 | 1063 | prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ |
f7f16b77 | 1064 | include/config/auto.conf |
7bb9d092 | 1065 | $(cmd_crmodverdir) |
1da177e4 | 1066 | |
6520fe55 | 1067 | archprepare: archheaders archscripts prepare1 scripts_basic |
5bb78269 | 1068 | |
6b90bd4b | 1069 | prepare0: archprepare gcc-plugins |
8d36a623 | 1070 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1071 | |
1da177e4 | 1072 | # All the preparing.. |
b9ab5ebb JP |
1073 | prepare: prepare0 prepare-objtool |
1074 | ||
1075 | PHONY += prepare-objtool | |
3b27a0c8 | 1076 | prepare-objtool: $(objtool_target) |
1da177e4 | 1077 | |
c965b105 KC |
1078 | # Check for CONFIG flags that require compiler support. Abort the build |
1079 | # after .config has been processed, but before the kernel build starts. | |
1080 | # | |
1081 | # For security-sensitive CONFIG options, we don't want to fallback and/or | |
1082 | # silently change which compiler flags will be used, since that leads to | |
1083 | # producing kernels with different security feature characteristics | |
1084 | # depending on the compiler used. (For example, "But I selected | |
1085 | # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") | |
1086 | PHONY += prepare-compiler-check | |
1087 | prepare-compiler-check: FORCE | |
1088 | # Make sure compiler supports requested stack protector flag. | |
1089 | ifdef stackp-name | |
1090 | ifeq ($(call cc-option, $(stackp-flag)),) | |
1091 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1092 | $(stackp-flag) not supported by compiler >&2 && exit 1 | |
1093 | endif | |
1094 | endif | |
1095 | # Make sure compiler does not have buggy stack-protector support. | |
1096 | ifdef stackp-check | |
1097 | ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) | |
1098 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1099 | $(stackp-flag) available but compiler is broken >&2 && exit 1 | |
1100 | endif | |
1101 | endif | |
1102 | @: | |
1103 | ||
1da177e4 LT |
1104 | # Generate some files |
1105 | # --------------------------------------------------------------------------- | |
1106 | ||
1107 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1108 | # needs to be updated, so this check is forced on all builds | |
1109 | ||
1110 | uts_len := 64 | |
63104eec SR |
1111 | define filechk_utsrelease.h |
1112 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1113 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1114 | exit 1; \ | |
1115 | fi; \ | |
1116 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1117 | endef | |
1da177e4 LT |
1118 | |
1119 | define filechk_version.h | |
450c6076 JJ |
1120 | (echo \#define LINUX_VERSION_CODE $(shell \ |
1121 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
63104eec | 1122 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
1da177e4 LT |
1123 | endef |
1124 | ||
d183e6f5 | 1125 | $(version_h): $(srctree)/Makefile FORCE |
1da177e4 | 1126 | $(call filechk,version.h) |
223c24a7 | 1127 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1128 | |
273b281f | 1129 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1130 | $(call filechk,utsrelease.h) |
1131 | ||
179efcb4 VN |
1132 | PHONY += headerdep |
1133 | headerdep: | |
9663d989 PF |
1134 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1135 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1136 | |
8d730cfb DW |
1137 | # --------------------------------------------------------------------------- |
1138 | # Kernel headers | |
8d730cfb | 1139 | |
e6883b18 SR |
1140 | #Default location for installed headers |
1141 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1142 | |
0f042eea | 1143 | # If we do an all arch process set dst to include/arch-$(hdr-arch) |
61562f98 | 1144 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include) |
e6883b18 | 1145 | |
052ad274 PA |
1146 | PHONY += archheaders |
1147 | archheaders: | |
1148 | ||
6520fe55 PA |
1149 | PHONY += archscripts |
1150 | archscripts: | |
1151 | ||
e6883b18 | 1152 | PHONY += __headers |
a9d9a400 | 1153 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
e1b702cf | 1154 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1155 | |
1156 | PHONY += headers_install_all | |
2fb9b1bd SR |
1157 | headers_install_all: |
1158 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1159 | |
8d730cfb | 1160 | PHONY += headers_install |
e6883b18 | 1161 | headers_install: __headers |
10b63956 DH |
1162 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ |
1163 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
a8ff49a1 | 1164 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
61562f98 | 1165 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) |
8d730cfb | 1166 | |
1f85712e MF |
1167 | PHONY += headers_check_all |
1168 | headers_check_all: headers_install_all | |
2fb9b1bd | 1169 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1170 | |
68475359 DW |
1171 | PHONY += headers_check |
1172 | headers_check: headers_install | |
a8ff49a1 | 1173 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
05d8cba4 | 1174 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1 |
68475359 | 1175 | |
5a5da78b SK |
1176 | # --------------------------------------------------------------------------- |
1177 | # Kernel selftest | |
1178 | ||
1179 | PHONY += kselftest | |
1180 | kselftest: | |
2bc84526 | 1181 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1182 | |
801d2e9f | 1183 | PHONY += kselftest-clean |
dcb825a9 | 1184 | kselftest-clean: |
2bc84526 | 1185 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1186 | |
3d6dee7a BJZ |
1187 | PHONY += kselftest-merge |
1188 | kselftest-merge: | |
1189 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1190 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1191 | -m $(objtree)/.config \ | |
1192 | $(srctree)/tools/testing/selftests/*/config | |
1193 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1194 | ||
1da177e4 LT |
1195 | # --------------------------------------------------------------------------- |
1196 | # Modules | |
1197 | ||
1198 | ifdef CONFIG_MODULES | |
1199 | ||
070b98bf | 1200 | # By default, build modules as well |
1da177e4 | 1201 | |
73d1393e | 1202 | all: modules |
1da177e4 | 1203 | |
3fbb43df | 1204 | # Build modules |
551559e1 | 1205 | # |
3fbb43df MY |
1206 | # A module can be listed more than once in obj-m resulting in |
1207 | # duplicate lines in modules.order files. Those are removed | |
1208 | # using awk while concatenating to the final file. | |
1da177e4 | 1209 | |
4f193362 | 1210 | PHONY += modules |
2da30e70 | 1211 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1212 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1213 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1214 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1215 | |
a6c36632 MM |
1216 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1217 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1218 | ||
73d1393e | 1219 | %/modules.builtin: include/config/auto.conf |
a6c36632 MM |
1220 | $(Q)$(MAKE) $(modbuiltin)=$* |
1221 | ||
1da177e4 LT |
1222 | |
1223 | # Target to prepare building external modules | |
4f193362 | 1224 | PHONY += modules_prepare |
5bb78269 | 1225 | modules_prepare: prepare scripts |
1da177e4 LT |
1226 | |
1227 | # Target to install modules | |
4f193362 | 1228 | PHONY += modules_install |
1da177e4 LT |
1229 | modules_install: _modinst_ _modinst_post |
1230 | ||
4f193362 | 1231 | PHONY += _modinst_ |
2da30e70 | 1232 | _modinst_: |
1da177e4 LT |
1233 | @rm -rf $(MODLIB)/kernel |
1234 | @rm -f $(MODLIB)/source | |
1235 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1236 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1237 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1238 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1239 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1240 | fi |
551559e1 | 1241 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1242 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1243 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1244 | |
50a8ec31 | 1245 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1246 | # boot a modules.dep even before / is mounted read-write. However the |
1247 | # boot script depmod is the master version. | |
4f193362 | 1248 | PHONY += _modinst_post |
6d128e1e | 1249 | _modinst_post: _modinst_ |
50a8ec31 | 1250 | $(call cmd,depmod) |
1da177e4 | 1251 | |
d890f510 JB |
1252 | ifeq ($(CONFIG_MODULE_SIG), y) |
1253 | PHONY += modules_sign | |
1254 | modules_sign: | |
1255 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1256 | endif | |
1257 | ||
1da177e4 LT |
1258 | else # CONFIG_MODULES |
1259 | ||
1260 | # Modules not configured | |
1261 | # --------------------------------------------------------------------------- | |
1262 | ||
612e47ce MY |
1263 | PHONY += modules modules_install |
1264 | modules modules_install: | |
5369f550 MM |
1265 | @echo >&2 |
1266 | @echo >&2 "The present kernel configuration has modules disabled." | |
1267 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1268 | @echo >&2 "Then build a kernel with module support enabled." | |
1269 | @echo >&2 | |
1da177e4 LT |
1270 | @exit 1 |
1271 | ||
1272 | endif # CONFIG_MODULES | |
1273 | ||
1da177e4 LT |
1274 | ### |
1275 | # Cleaning is done on three levels. | |
1276 | # make clean Delete most generated files | |
1277 | # Leave enough to build external modules | |
1278 | # make mrproper Delete the current configuration, and all generated files | |
1279 | # make distclean Remove editor backup files, patch leftover files and the like | |
1280 | ||
1281 | # Directories & files removed with 'make clean' | |
1282 | CLEAN_DIRS += $(MODVERDIR) | |
1da177e4 LT |
1283 | |
1284 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1285 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1286 | arch/*/include/generated .tmp_objdiff |
c22bd32c | 1287 | MRPROPER_FILES += .config .config.old .version .old_version \ |
d5b71936 | 1288 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
fb117949 DW |
1289 | signing_key.pem signing_key.priv signing_key.x509 \ |
1290 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1291 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1292 | |
1293 | # clean - Delete most, but leave enough to build external modules | |
1294 | # | |
1295 | clean: rm-dirs := $(CLEAN_DIRS) | |
1296 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1297 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1298 | |
bd1ee804 | 1299 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1300 | $(clean-dirs): |
1301 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1302 | ||
bd1ee804 PM |
1303 | vmlinuxclean: |
1304 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1305 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1306 | |
1307 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1308 | |
1309 | # mrproper - Delete all generated files, including .config | |
1310 | # | |
1311 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1312 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1313 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1314 | |
4f193362 | 1315 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1316 | $(mrproper-dirs): |
1317 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1318 | ||
1319 | mrproper: clean archmrproper $(mrproper-dirs) | |
1320 | $(call cmd,rmdirs) | |
1321 | $(call cmd,rmfiles) | |
1322 | ||
1323 | # distclean | |
1324 | # | |
4f193362 | 1325 | PHONY += distclean |
1da177e4 LT |
1326 | |
1327 | distclean: mrproper | |
1328 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1329 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1330 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1331 | -o -name 'core' \) \ | |
1da177e4 LT |
1332 | -type f -print | xargs rm -f |
1333 | ||
1334 | ||
1335 | # Packaging of the kernel to various formats | |
1336 | # --------------------------------------------------------------------------- | |
1337 | # rpm target kept for backward compatibility | |
c79624c1 | 1338 | package-dir := scripts/package |
1da177e4 | 1339 | |
bafb6747 ACM |
1340 | %src-pkg: FORCE |
1341 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1342 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1343 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
031ecc6d | 1344 | rpm: include/config/kernel.release FORCE |
6c2133e1 | 1345 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1346 | |
1347 | ||
1348 | # Brief documentation of the typical targets used | |
1349 | # --------------------------------------------------------------------------- | |
1350 | ||
5dffbe81 | 1351 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1352 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1353 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1354 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1355 | |
fe69b420 | 1356 | PHONY += help |
1da177e4 LT |
1357 | help: |
1358 | @echo 'Cleaning targets:' | |
5ea084ef | 1359 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1360 | @echo ' enough build support to build external modules' |
5ea084ef | 1361 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1362 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1363 | @echo '' |
1364 | @echo 'Configuration targets:' | |
1365 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1366 | @echo '' | |
1367 | @echo 'Other generic targets:' | |
1368 | @echo ' all - Build all targets marked with [*]' | |
1369 | @echo '* vmlinux - Build the bare kernel' | |
1370 | @echo '* modules - Build all modules' | |
9cc5d74c | 1371 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1372 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1373 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1374 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1375 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1376 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1377 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1378 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1379 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1380 | @echo ' tags/TAGS - Generate tags file for editors' |
1381 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1382 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1383 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1384 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1385 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1386 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1387 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1388 | echo '' |
31b8cc80 | 1389 | @echo 'Static analysers:' |
1da177e4 LT |
1390 | @echo ' checkstack - Generate a list of stack hogs' |
1391 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1392 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1393 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1394 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1395 | @echo ' headers_check - Sanity check on exported headers' |
74425eee NP |
1396 | @echo ' headerdep - Detect inclusion cycles in headers' |
1397 | @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help | |
1398 | @echo '' | |
31b8cc80 | 1399 | @echo 'Kernel selftest:' |
5a5da78b SK |
1400 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1401 | @echo ' Build, install, and boot kernel before' | |
1402 | @echo ' running kselftest on it' | |
dcb825a9 | 1403 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1404 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1405 | @echo ' .config.' |
5a5da78b | 1406 | @echo '' |
31b8cc80 RD |
1407 | @echo 'Userspace tools targets:' |
1408 | @echo ' use "make tools/help"' | |
1409 | @echo ' or "cd tools; make help"' | |
1410 | @echo '' | |
1da177e4 | 1411 | @echo 'Kernel packaging:' |
6c2133e1 | 1412 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1413 | @echo '' |
1414 | @echo 'Documentation targets:' | |
cb43fb57 | 1415 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1416 | @echo '' |
01dee188 | 1417 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1418 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1419 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1420 | @echo '' |
1421 | @$(if $(boards), \ | |
1422 | $(foreach b, $(boards), \ | |
1423 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1424 | echo '') | |
5dffbe81 SB |
1425 | @$(if $(board-dirs), \ |
1426 | $(foreach b, $(board-dirs), \ | |
1427 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1428 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1429 | echo '') | |
1da177e4 LT |
1430 | |
1431 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1432 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1433 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1434 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1435 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1436 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1437 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1438 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1439 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1440 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1441 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1442 | @echo '' |
1443 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1444 | @echo 'For further info see the ./README file' | |
1445 | ||
1446 | ||
5dffbe81 SB |
1447 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1448 | ||
1449 | help-boards: $(help-board-dirs) | |
1450 | ||
fbae4d58 | 1451 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1452 | |
1453 | $(help-board-dirs): help-%: | |
1454 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1455 | @$(if $(boards-per-dir), \ | |
1456 | $(foreach b, $(boards-per-dir), \ | |
1457 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1458 | echo '') | |
1459 | ||
1460 | ||
1da177e4 LT |
1461 | # Documentation targets |
1462 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1463 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1464 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1465 | PHONY += $(DOC_TARGETS) |
1466 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1467 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 LT |
1468 | |
1469 | else # KBUILD_EXTMOD | |
1470 | ||
1471 | ### | |
1472 | # External module support. | |
1473 | # When building external modules the kernel used as basis is considered | |
1474 | # read-only, and no consistency checks are made and the make | |
1475 | # system is not used on the basis kernel. If updates are required | |
1476 | # in the basis kernel ordinary make commands (without M=...) must | |
1477 | # be used. | |
1478 | # | |
1479 | # The following are the only valid targets when building external | |
1480 | # modules. | |
1481 | # make M=dir clean Delete all automatically generated files | |
1482 | # make M=dir modules Make all modules in specified dir | |
1483 | # make M=dir Same as 'make M=dir modules' | |
1484 | # make M=dir modules_install | |
070b98bf | 1485 | # Install the modules built in the module directory |
1da177e4 LT |
1486 | # Assumes install directory is already created |
1487 | ||
1488 | # We are always building modules | |
1489 | KBUILD_MODULES := 1 | |
4f193362 | 1490 | PHONY += crmodverdir |
1da177e4 | 1491 | crmodverdir: |
7bb9d092 | 1492 | $(cmd_crmodverdir) |
1da177e4 | 1493 | |
4f193362 | 1494 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1495 | $(objtree)/Module.symvers: |
1496 | @test -e $(objtree)/Module.symvers || ( \ | |
1497 | echo; \ | |
1498 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1499 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1500 | echo ) | |
1501 | ||
1502 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1503 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1504 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1505 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1506 | ||
1507 | modules: $(module-dirs) | |
fd54f502 | 1508 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1509 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1510 | |
4f193362 | 1511 | PHONY += modules_install |
a67dc21a | 1512 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1513 | |
4f193362 PS |
1514 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1515 | PHONY += _emodinst_ | |
a67dc21a | 1516 | _emodinst_: |
a67dc21a | 1517 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1518 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1519 | |
4f193362 | 1520 | PHONY += _emodinst_post |
a67dc21a SR |
1521 | _emodinst_post: _emodinst_ |
1522 | $(call cmd,depmod) | |
1523 | ||
1da177e4 LT |
1524 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1525 | ||
4f193362 | 1526 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1527 | $(clean-dirs): |
1528 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1529 | ||
1530 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1531 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1532 | |
fe69b420 | 1533 | PHONY += help |
1da177e4 LT |
1534 | help: |
1535 | @echo ' Building external modules.' | |
1536 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1537 | @echo '' | |
1538 | @echo ' modules - default target, build the module(s)' | |
1539 | @echo ' modules_install - install the module' | |
1540 | @echo ' clean - remove generated files in module directory only' | |
1541 | @echo '' | |
06300b21 SR |
1542 | |
1543 | # Dummies... | |
4f193362 | 1544 | PHONY += prepare scripts |
06300b21 SR |
1545 | prepare: ; |
1546 | scripts: ; | |
1da177e4 LT |
1547 | endif # KBUILD_EXTMOD |
1548 | ||
88d7be03 MM |
1549 | clean: $(clean-dirs) |
1550 | $(call cmd,rmdirs) | |
1551 | $(call cmd,rmfiles) | |
43f67c98 | 1552 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
88d7be03 | 1553 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
74ce1896 | 1554 | -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ |
866ced95 | 1555 | -o -name '*.dwo' \ |
d523b255 | 1556 | -o -name '*.su' \ |
88d7be03 MM |
1557 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
1558 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1559 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1560 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1561 | -o -name '*.ll' \ |
88d7be03 MM |
1562 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1563 | ||
1da177e4 LT |
1564 | # Generate tags for editors |
1565 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1566 | quiet_cmd_tags = GEN $@ |
1567 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1568 | |
f4ed1009 | 1569 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1570 | $(call cmd,tags) |
1571 | ||
1da177e4 LT |
1572 | # Scripts to check various things for consistency |
1573 | # --------------------------------------------------------------------------- | |
1574 | ||
279f3dd3 PF |
1575 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1576 | ||
1da177e4 | 1577 | includecheck: |
436f876c | 1578 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1579 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1580 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1581 | |
1582 | versioncheck: | |
2ee2d292 | 1583 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1584 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1585 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1586 | |
74425eee NP |
1587 | coccicheck: |
1588 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1589 | ||
1da177e4 LT |
1590 | namespacecheck: |
1591 | $(PERL) $(srctree)/scripts/namespace.pl | |
1592 | ||
295ac051 AB |
1593 | export_report: |
1594 | $(PERL) $(srctree)/scripts/export_report.pl | |
1595 | ||
1da177e4 LT |
1596 | endif #ifeq ($(config-targets),1) |
1597 | endif #ifeq ($(mixed-targets),1) | |
1598 | ||
c398ff00 | 1599 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1600 | |
011e3a9a JD |
1601 | # UML needs a little special treatment here. It wants to use the host |
1602 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1603 | # else wants $(ARCH), including people doing cross-builds, which means | |
1604 | # that $(SUBARCH) doesn't work here. | |
1605 | ifeq ($(ARCH), um) | |
1606 | CHECKSTACK_ARCH := $(SUBARCH) | |
1607 | else | |
1608 | CHECKSTACK_ARCH := $(ARCH) | |
1609 | endif | |
1da177e4 LT |
1610 | checkstack: |
1611 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1612 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1613 | |
7b8ea53d AW |
1614 | kernelrelease: |
1615 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1616 | |
cb58455c | 1617 | kernelversion: |
2244cbd8 | 1618 | @echo $(KERNELVERSION) |
1da177e4 | 1619 | |
c398ff00 MM |
1620 | image_name: |
1621 | @echo $(KBUILD_IMAGE) | |
1622 | ||
ea01fa9f BP |
1623 | # Clear a bunch of variables before executing the submake |
1624 | tools/: FORCE | |
bf35182f | 1625 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1626 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1627 | |
1628 | tools/%: FORCE | |
bf35182f | 1629 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1630 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1631 | |
06300b21 SR |
1632 | # Single targets |
1633 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1634 | # Single targets are compatible with: |
e1b8513d | 1635 | # - build with mixed source and output |
bc2546a6 SR |
1636 | # - build with separate output dir 'make O=...' |
1637 | # - external modules | |
1638 | # | |
1639 | # target-dir => where to store outputfile | |
1640 | # build-dir => directory in kernel source tree to use | |
1641 | ||
1642 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1643 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1644 | target-dir = $(dir $@) |
1645 | else | |
1646 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1647 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1648 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1649 | endif | |
1650 | ||
f6ecebd6 | 1651 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1652 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1653 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1654 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1655 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1656 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1657 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1658 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1659 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1660 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1661 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1662 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1663 | %.symtypes: %.c prepare scripts FORCE |
1664 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
433db3e2 VT |
1665 | %.ll: %.c prepare scripts FORCE |
1666 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1667 | |
bc2546a6 | 1668 | # Modules |
31110ebb SR |
1669 | /: prepare scripts FORCE |
1670 | $(cmd_crmodverdir) | |
1671 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1672 | $(build)=$(build-dir) | |
8e2faea8 | 1673 | # Make sure the latest headers are built for Documentation |
ddea05fa | 1674 | Documentation/ samples/: headers_install |
31110ebb | 1675 | %/: prepare scripts FORCE |
7bb9d092 | 1676 | $(cmd_crmodverdir) |
06300b21 | 1677 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1678 | $(build)=$(build-dir) |
1679 | %.ko: prepare scripts FORCE | |
7bb9d092 | 1680 | $(cmd_crmodverdir) |
06300b21 | 1681 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1682 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1683 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1684 | |
38385f8f | 1685 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1686 | # =========================================================================== |
1687 | ||
1688 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1689 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1690 | ||
1691 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1692 | cmd_rmfiles = rm -f $(rm-files) | |
1693 | ||
bc3c26fe | 1694 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1695 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1696 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
b92021b0 | 1697 | $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" |
50a8ec31 | 1698 | |
7bb9d092 | 1699 | # Create temporary dir for module support files |
ab19f879 SR |
1700 | # clean it up only when building all modules |
1701 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1702 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1da177e4 | 1703 | |
1da177e4 LT |
1704 | # read all saved command lines |
1705 | ||
1706 | targets := $(wildcard $(sort $(targets))) | |
1707 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1708 | ||
1709 | ifneq ($(cmd_files),) | |
1710 | $(cmd_files): ; # Do not try to update included dependency files | |
1711 | include $(cmd_files) | |
1712 | endif | |
1713 | ||
1da177e4 LT |
1714 | endif # skip-makefile |
1715 | ||
4f193362 | 1716 | PHONY += FORCE |
1da177e4 | 1717 | FORCE: |
4f193362 | 1718 | |
4f193362 | 1719 | # Declare the contents of the .PHONY variable as phony. We keep that |
fe8d0a41 | 1720 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1721 | .PHONY: $(PHONY) |