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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 LT |
2 | VERSION = 5 |
3 | PATCHLEVEL = 0 | |
e4abcebe | 4 | SUBLEVEL = 9 |
1c163f4c | 5 | EXTRAVERSION = |
2e6e902d | 6 | NAME = Shy Crocodile |
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 | ||
ba634ece MY |
14 | # That's our default target when none is given on the command line |
15 | PHONY := _all | |
16 | _all: | |
17 | ||
1da177e4 LT |
18 | # We are using a recursive build, so we need to do a little thinking |
19 | # to get the ordering right. | |
20 | # | |
21 | # Most importantly: sub-Makefiles should only ever modify files in | |
22 | # their own directory. If in some directory we have a dependency on | |
23 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 24 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
25 | # turn into vmlinux), we will call a sub make in that other dir, and |
26 | # after that we are sure that everything which is in that other dir | |
27 | # is now up to date. | |
28 | # | |
29 | # The only cases where we need to modify files which have global | |
30 | # effects are thus separated out and done before the recursive | |
31 | # descending is started. They are now explicitly listed as the | |
32 | # prepare rule. | |
33 | ||
e3e9d973 MY |
34 | ifneq ($(sub-make-done),1) |
35 | ||
36 | # Do not use make's built-in rules and variables | |
37 | # (this increases performance and avoids hard-to-debug behaviour) | |
38 | MAKEFLAGS += -rR | |
39 | ||
40 | # Avoid funny character set dependencies | |
41 | unexport LC_ALL | |
42 | LC_COLLATE=C | |
43 | LC_NUMERIC=C | |
44 | export LC_COLLATE LC_NUMERIC | |
45 | ||
46 | # Avoid interference with shell env settings | |
47 | unexport GREP_OPTIONS | |
48 | ||
066b7ed9 MM |
49 | # Beautify output |
50 | # --------------------------------------------------------------------------- | |
51 | # | |
52 | # Normally, we echo the whole command before executing it. By making | |
53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
54 | # $(quiet) to choose other forms of output instead, e.g. | |
55 | # | |
56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
58 | # | |
59 | # If $(quiet) is empty, the whole command will be printed. | |
60 | # If it is set to "quiet_", only the short version will be printed. | |
61 | # If it is set to "silent_", nothing will be printed at all, since | |
62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
63 | # | |
64 | # A simple variant is to prefix commands with $(Q) - that's useful | |
65 | # for commands that shall be hidden in non-verbose mode. | |
66 | # | |
67 | # $(Q)ln $@ :< | |
68 | # | |
69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
71 | # | |
1da177e4 LT |
72 | # To put more focus on warnings, be less verbose as default |
73 | # Use 'make V=1' to see the full commands | |
74 | ||
b8b0618c CR |
75 | ifeq ("$(origin V)", "command line") |
76 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
77 | endif |
78 | ifndef KBUILD_VERBOSE | |
79 | KBUILD_VERBOSE = 0 | |
80 | endif | |
81 | ||
066b7ed9 MM |
82 | ifeq ($(KBUILD_VERBOSE),1) |
83 | quiet = | |
84 | Q = | |
85 | else | |
86 | quiet=quiet_ | |
87 | Q = @ | |
88 | endif | |
89 | ||
90 | # If the user is running make -s (silent mode), suppress echoing of | |
91 | # commands | |
92 | ||
6f0fa58e | 93 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 | 94 | quiet=silent_ |
e572d088 | 95 | tools_silent=s |
066b7ed9 | 96 | endif |
066b7ed9 MM |
97 | |
98 | export quiet Q KBUILD_VERBOSE | |
99 | ||
1da177e4 LT |
100 | # kbuild supports saving output files in a separate directory. |
101 | # To locate output files in a separate directory two syntaxes are supported. | |
102 | # In both cases the working directory must be the root of the kernel src. | |
103 | # 1) O= | |
104 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 105 | # |
1da177e4 LT |
106 | # 2) Set KBUILD_OUTPUT |
107 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
108 | # where the output files shall be placed. | |
109 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
110 | # make | |
111 | # | |
112 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
113 | # variable. | |
114 | ||
c4e6fff1 C |
115 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
116 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
1da177e4 LT |
117 | |
118 | # OK, Make called in directory where kernel src resides | |
119 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
120 | ifeq ("$(origin O)", "command line") |
121 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
122 | endif |
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 | 134 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
16f8259c | 135 | && pwd) |
1da177e4 | 136 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 137 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 138 | |
80463f1b MY |
139 | # Look for make include files relative to root of kernel src |
140 | # | |
141 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
142 | # once after the Makefile is read. It is OK since we are going to invoke | |
143 | # 'sub-make' below. | |
144 | MAKEFLAGS += --include-dir=$(CURDIR) | |
145 | ||
e73f1455 | 146 | need-sub-make := 1 |
e3e9d973 MY |
147 | else |
148 | ||
149 | # Do not print "Entering directory ..." at all for in-tree build. | |
150 | MAKEFLAGS += --no-print-directory | |
151 | ||
152 | endif # ifneq ($(KBUILD_OUTPUT),) | |
153 | ||
e73f1455 MY |
154 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
155 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
156 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
157 | need-sub-make := 1 | |
158 | # Cancel implicit rules for this Makefile. | |
159 | $(lastword $(MAKEFILE_LIST)): ; | |
160 | endif | |
161 | ||
162 | ifeq ($(need-sub-make),1) | |
163 | ||
0b35786d MM |
164 | PHONY += $(MAKECMDGOALS) sub-make |
165 | ||
1cacc9ab | 166 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 167 | @: |
0b35786d | 168 | |
c4e6fff1 | 169 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 170 | sub-make: |
e3e9d973 MY |
171 | $(Q)$(MAKE) sub-make-done=1 \ |
172 | $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ | |
aa55c8e2 | 173 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 | 174 | |
e73f1455 MY |
175 | endif # need-sub-make |
176 | endif # sub-make-done | |
177 | ||
1da177e4 | 178 | # We process the rest of the Makefile if this is the final invocation of make |
e73f1455 | 179 | ifeq ($(need-sub-make),) |
1da177e4 | 180 | |
7ff52571 MY |
181 | # Do not print "Entering directory ...", |
182 | # but we want to display it when entering to the output directory | |
183 | # so that IDEs/editors are able to understand relative filenames. | |
184 | MAKEFLAGS += --no-print-directory | |
185 | ||
aa55c8e2 MY |
186 | # Call a source code checker (by default, "sparse") as part of the |
187 | # C compilation. | |
188 | # | |
189 | # Use 'make C=1' to enable checking of only re-compiled files. | |
190 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
191 | # of whether they are re-compiled or not. | |
192 | # | |
036db11c C |
193 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
194 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
195 | |
196 | ifeq ("$(origin C)", "command line") | |
197 | KBUILD_CHECKSRC = $(C) | |
198 | endif | |
199 | ifndef KBUILD_CHECKSRC | |
200 | KBUILD_CHECKSRC = 0 | |
201 | endif | |
202 | ||
203 | # Use make M=dir to specify directory of external module to build | |
204 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
205 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
206 | ifdef SUBDIRS | |
0126be38 MY |
207 | $(warning ================= WARNING ================) |
208 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
209 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
210 | $(warning ==========================================) | |
aa55c8e2 MY |
211 | KBUILD_EXTMOD ?= $(SUBDIRS) |
212 | endif | |
213 | ||
214 | ifeq ("$(origin M)", "command line") | |
215 | KBUILD_EXTMOD := $(M) | |
216 | endif | |
217 | ||
9da0763b MM |
218 | ifeq ($(KBUILD_SRC),) |
219 | # building in the source tree | |
220 | srctree := . | |
221 | else | |
222 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
223 | # building in a subdirectory of the source tree | |
224 | srctree := .. | |
225 | else | |
226 | srctree := $(KBUILD_SRC) | |
227 | endif | |
228 | endif | |
2c1f4f12 MY |
229 | |
230 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
231 | ||
7e1c0477 | 232 | objtree := . |
1da177e4 LT |
233 | src := $(srctree) |
234 | obj := $(objtree) | |
235 | ||
0f558c33 | 236 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 | 237 | |
11294235 | 238 | export srctree objtree VPATH |
1da177e4 | 239 | |
2c1f4f12 MY |
240 | # To make sure we do not include .config for any of the *config targets |
241 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
242 | # It is allowed to specify more targets when calling make, including | |
243 | # mixing *config targets and build targets. | |
244 | # For example 'make oldconfig all'. | |
245 | # Detect when mixed targets is specified, and make a second invocation | |
246 | # of make so .config is not included in this case either (for *config). | |
247 | ||
248 | version_h := include/generated/uapi/linux/version.h | |
249 | old_version_h := include/linux/version.h | |
250 | ||
22340a06 MY |
251 | clean-targets := %clean mrproper cleandocs |
252 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 MY |
253 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
254 | $(version_h) headers_% archheaders archscripts \ | |
63e31a67 | 255 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
256 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
257 | kernelrelease | |
2c1f4f12 | 258 | |
d7942413 MY |
259 | config-targets := 0 |
260 | mixed-targets := 0 | |
261 | dot-config := 1 | |
262 | may-sync-config := 1 | |
2c1f4f12 MY |
263 | |
264 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
265 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
266 | dot-config := 0 | |
267 | endif | |
268 | endif | |
269 | ||
d7942413 MY |
270 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
271 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
272 | may-sync-config := 0 | |
273 | endif | |
274 | endif | |
275 | ||
276 | ifneq ($(KBUILD_EXTMOD),) | |
277 | may-sync-config := 0 | |
278 | endif | |
279 | ||
2c1f4f12 MY |
280 | ifeq ($(KBUILD_EXTMOD),) |
281 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
282 | config-targets := 1 | |
283 | ifneq ($(words $(MAKECMDGOALS)),1) | |
284 | mixed-targets := 1 | |
285 | endif | |
286 | endif | |
287 | endif | |
22340a06 MY |
288 | |
289 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
290 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
291 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
292 | mixed-targets := 1 | |
293 | endif | |
294 | endif | |
295 | ||
2c1f4f12 MY |
296 | # install and modules_install need also be processed one by one |
297 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
298 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
299 | mixed-targets := 1 | |
300 | endif | |
301 | endif | |
302 | ||
303 | ifeq ($(mixed-targets),1) | |
304 | # =========================================================================== | |
305 | # We're called with mixed targets (*config and build targets). | |
306 | # Handle them one by one. | |
307 | ||
308 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
309 | ||
310 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
311 | @: | |
312 | ||
313 | __build_one_by_one: | |
314 | $(Q)set -e; \ | |
315 | for i in $(MAKECMDGOALS); do \ | |
316 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
317 | done | |
318 | ||
319 | else | |
320 | ||
321 | # We need some generic definitions (do not try to remake the file). | |
322 | scripts/Kbuild.include: ; | |
323 | include scripts/Kbuild.include | |
324 | ||
325 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
326 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
327 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
328 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
329 | ||
b2d35fa5 | 330 | include scripts/subarch.include |
1da177e4 LT |
331 | |
332 | # Cross compiling and selecting different set of gcc/bin-utils | |
333 | # --------------------------------------------------------------------------- | |
334 | # | |
335 | # When performing cross compilation for other architectures ARCH shall be set | |
336 | # to the target architecture. (See arch/* for the possibilities). | |
337 | # ARCH can be set during invocation of make: | |
338 | # make ARCH=ia64 | |
339 | # Another way is to have ARCH set in the environment. | |
340 | # The default ARCH is the host where make is executed. | |
341 | ||
342 | # CROSS_COMPILE specify the prefix used for all executables used | |
343 | # during compilation. Only gcc and related bin-utils executables | |
344 | # are prefixed with $(CROSS_COMPILE). | |
345 | # CROSS_COMPILE can be set on the command line | |
346 | # make CROSS_COMPILE=ia64-linux- | |
347 | # Alternatively CROSS_COMPILE can be set in the environment. | |
348 | # Default value for CROSS_COMPILE is not to prefix executables | |
349 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 350 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
351 | |
352 | # Architecture as present in compile.h | |
6752ed90 TG |
353 | UTS_MACHINE := $(ARCH) |
354 | SRCARCH := $(ARCH) | |
1da177e4 | 355 | |
d746d647 SR |
356 | # Additional ARCH settings for x86 |
357 | ifeq ($(ARCH),i386) | |
358 | SRCARCH := x86 | |
359 | endif | |
360 | ifeq ($(ARCH),x86_64) | |
361 | SRCARCH := x86 | |
362 | endif | |
74b469f2 | 363 | |
5e538790 | 364 | # Additional ARCH settings for sparc |
e69f58c0 NK |
365 | ifeq ($(ARCH),sparc32) |
366 | SRCARCH := sparc | |
367 | endif | |
a439fe51 | 368 | ifeq ($(ARCH),sparc64) |
5e538790 | 369 | SRCARCH := sparc |
a439fe51 | 370 | endif |
2fb9b1bd | 371 | |
3cc000b5 PM |
372 | # Additional ARCH settings for sh |
373 | ifeq ($(ARCH),sh64) | |
374 | SRCARCH := sh | |
375 | endif | |
376 | ||
14cdd3c4 | 377 | KCONFIG_CONFIG ?= .config |
41263fc6 | 378 | export KCONFIG_CONFIG |
14cdd3c4 | 379 | |
1da177e4 LT |
380 | # SHELL used by kbuild |
381 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
382 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
383 | else echo sh; fi ; fi) | |
384 | ||
6d79a7b4 MY |
385 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
386 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
387 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 388 | |
070b98bf SR |
389 | HOSTCC = gcc |
390 | HOSTCXX = g++ | |
96f14fe7 | 391 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
392 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
393 | $(HOSTCFLAGS) | |
394 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
395 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
396 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 397 | |
1da177e4 | 398 | # Make variables (CC, etc...) |
1da177e4 LT |
399 | AS = $(CROSS_COMPILE)as |
400 | LD = $(CROSS_COMPILE)ld | |
401 | CC = $(CROSS_COMPILE)gcc | |
402 | CPP = $(CC) -E | |
403 | AR = $(CROSS_COMPILE)ar | |
404 | NM = $(CROSS_COMPILE)nm | |
405 | STRIP = $(CROSS_COMPILE)strip | |
406 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
407 | OBJDUMP = $(CROSS_COMPILE)objdump | |
73a4f6db MY |
408 | LEX = flex |
409 | YACC = bison | |
1da177e4 LT |
410 | AWK = awk |
411 | GENKSYMS = scripts/genksyms/genksyms | |
caa27b66 | 412 | INSTALLKERNEL := installkernel |
1da177e4 | 413 | DEPMOD = /sbin/depmod |
1da177e4 | 414 | PERL = perl |
011bf125 | 415 | PYTHON = python |
e9781b52 MY |
416 | PYTHON2 = python2 |
417 | PYTHON3 = python3 | |
1da177e4 LT |
418 | CHECK = sparse |
419 | ||
80a7d1d9 | 420 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 421 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
b36fad65 | 422 | NOSTDINC_FLAGS = |
6588169d SR |
423 | CFLAGS_MODULE = |
424 | AFLAGS_MODULE = | |
425 | LDFLAGS_MODULE = | |
1da177e4 LT |
426 | CFLAGS_KERNEL = |
427 | AFLAGS_KERNEL = | |
b36fad65 | 428 | LDFLAGS_vmlinux = |
1da177e4 | 429 | |
abbf1590 DH |
430 | # Use USERINCLUDE when you must reference the UAPI directories only. |
431 | USERINCLUDE := \ | |
9d022c54 MY |
432 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
433 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 434 | -I$(srctree)/include/uapi \ |
3308b285 | 435 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
436 | -include $(srctree)/include/linux/kconfig.h |
437 | ||
1da177e4 LT |
438 | # Use LINUXINCLUDE when you must reference the include/ directory. |
439 | # Needed to be compatible with the O= option | |
abbf1590 | 440 | LINUXINCLUDE := \ |
9d022c54 MY |
441 | -I$(srctree)/arch/$(SRCARCH)/include \ |
442 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
abbf1590 | 443 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
f8224f7f MY |
444 | -I$(objtree)/include \ |
445 | $(USERINCLUDE) | |
1da177e4 | 446 | |
42a92bcc | 447 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 448 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 449 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
61a0902a | 450 | -Werror-implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 451 | -Wno-format-security \ |
433dc2eb MY |
452 | -std=gnu89 |
453 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
454 | KBUILD_AFLAGS_KERNEL := |
455 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
456 | KBUILD_AFLAGS_MODULE := -DMODULE |
457 | KBUILD_CFLAGS_MODULE := -DMODULE | |
458 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
d503ac53 | 459 | KBUILD_LDFLAGS := |
433dc2eb | 460 | GCC_PLUGINS_CFLAGS := |
1da177e4 | 461 | |
96f14fe7 | 462 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
8377bd2b | 463 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
e9781b52 | 464 | export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
10844aeb | 465 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 466 | |
d503ac53 | 467 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
468 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
469 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 470 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 471 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 472 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 473 | export KBUILD_ARFLAGS |
1da177e4 LT |
474 | |
475 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
476 | # tree rather than in the kernel tree. The kernel tree might | |
477 | # even be read-only. | |
478 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
479 | ||
1da177e4 LT |
480 | # Files to ignore in find ... statements |
481 | ||
ae63b2d7 PB |
482 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
483 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
484 | -prune -o | |
450c6076 JJ |
485 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
486 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
487 | |
488 | # =========================================================================== | |
489 | # Rules shared between *config targets and build targets | |
490 | ||
312a3d09 | 491 | # Basic helpers built in scripts/basic/ |
4f193362 | 492 | PHONY += scripts_basic |
1da177e4 LT |
493 | scripts_basic: |
494 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 495 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 496 | |
cd05e6bd JB |
497 | # To avoid any implicit rule to kick in, define an empty command. |
498 | scripts/basic/%: scripts_basic ; | |
499 | ||
4f193362 | 500 | PHONY += outputmakefile |
fd5f0cd6 JB |
501 | # outputmakefile generates a Makefile in the output directory, if using a |
502 | # separate output directory. This allows convenient use of make in the | |
503 | # output directory. | |
1da177e4 | 504 | outputmakefile: |
fd5f0cd6 | 505 | ifneq ($(KBUILD_SRC),) |
92979997 | 506 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 507 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
fd5f0cd6 | 508 | endif |
1da177e4 | 509 | |
99516742 | 510 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 511 | ifneq ($(CROSS_COMPILE),) |
238bcbc4 | 512 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
622902df | 513 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
238bcbc4 | 514 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
ef8c4ed9 | 515 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
516 | endif |
517 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 518 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 519 | endif |
238bcbc4 MY |
520 | CLANG_FLAGS += -no-integrated-as |
521 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
522 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 523 | export CLANG_FLAGS |
ae6b289a CF |
524 | endif |
525 | ||
d5028ba8 | 526 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
2e549b2e | 527 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
d5028ba8 | 528 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
2e549b2e | 529 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
d5028ba8 | 530 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
2e549b2e | 531 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
d5028ba8 | 532 | export RETPOLINE_CFLAGS |
2e549b2e | 533 | export RETPOLINE_VDSO_CFLAGS |
d5028ba8 | 534 | |
315bab4e MY |
535 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
536 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
537 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
538 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
539 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) | |
540 | ||
1da177e4 LT |
541 | ifeq ($(config-targets),1) |
542 | # =========================================================================== | |
543 | # *config targets only - make sure prerequisites are updated, and descend | |
544 | # in scripts/kconfig to make the *config target | |
545 | ||
546 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
547 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
548 | # used for 'make defconfig' | |
a436bb7b | 549 | include arch/$(SRCARCH)/Makefile |
315bab4e | 550 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 551 | |
31110ebb | 552 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
553 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
554 | ||
555 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
556 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
557 | ||
558 | else | |
559 | # =========================================================================== | |
560 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
561 | # targets and others. In general all targets except *config targets. | |
562 | ||
2c1f4f12 MY |
563 | # If building an external module we do not care about the all: rule |
564 | # but instead _all depend on modules | |
565 | PHONY += all | |
566 | ifeq ($(KBUILD_EXTMOD),) | |
567 | _all: all | |
568 | else | |
569 | _all: modules | |
570 | endif | |
571 | ||
572 | # Decide whether to build built-in, modular, or both. | |
573 | # Normally, just do built-in. | |
574 | ||
575 | KBUILD_MODULES := | |
576 | KBUILD_BUILTIN := 1 | |
577 | ||
578 | # If we have only "make modules", don't compile built-in objects. | |
579 | # When we're building modules with modversions, we need to consider | |
580 | # the built-in objects during the descend as well, in order to | |
581 | # make sure the checksums are up to date before we record them. | |
582 | ||
583 | ifeq ($(MAKECMDGOALS),modules) | |
584 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
585 | endif | |
586 | ||
587 | # If we have "make <whatever> modules", compile modules | |
588 | # in addition to whatever we do anyway. | |
589 | # Just "make" or "make all" shall build modules as well | |
590 | ||
591 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
592 | KBUILD_MODULES := 1 | |
593 | endif | |
594 | ||
595 | ifeq ($(MAKECMDGOALS),) | |
596 | KBUILD_MODULES := 1 | |
597 | endif | |
598 | ||
599 | export KBUILD_MODULES KBUILD_BUILTIN | |
600 | ||
1da177e4 | 601 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
602 | # Objects we will link into vmlinux / subdirs we need to visit |
603 | init-y := init/ | |
df85b2d7 | 604 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
605 | net-y := net/ |
606 | libs-y := lib/ | |
607 | core-y := usr/ | |
37d9fe47 | 608 | virt-y := virt/ |
1da177e4 LT |
609 | endif # KBUILD_EXTMOD |
610 | ||
611 | ifeq ($(dot-config),1) | |
0a16d2e8 | 612 | include include/config/auto.conf |
315bab4e MY |
613 | endif |
614 | ||
615 | # The all: target is the default when no target is given on the | |
616 | # command line. | |
617 | # This allow a user to issue only 'make' to build a kernel including modules | |
618 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
619 | all: vmlinux | |
620 | ||
621 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
622 | $(call cc-option,-fno-tree-loop-im) \ | |
623 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 624 | export CFLAGS_GCOV |
315bab4e | 625 | |
b1f4ff74 PZ |
626 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
627 | ifdef CONFIG_FUNCTION_TRACER | |
628 | CC_FLAGS_FTRACE := -pg | |
629 | endif | |
630 | ||
315bab4e MY |
631 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
632 | # values of the respective KBUILD_* variables | |
633 | ARCH_CPPFLAGS := | |
634 | ARCH_AFLAGS := | |
635 | ARCH_CFLAGS := | |
636 | include arch/$(SRCARCH)/Makefile | |
1da177e4 | 637 | |
315bab4e | 638 | ifeq ($(dot-config),1) |
d7942413 | 639 | ifeq ($(may-sync-config),1) |
315bab4e MY |
640 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
641 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
642 | # because some architectures define CROSS_COMPILE there. | |
c955ccaf | 643 | -include include/config/auto.conf.cmd |
1da177e4 | 644 | |
1da177e4 | 645 | # To avoid any implicit rule to kick in, define an empty command |
366a5ee9 | 646 | $(KCONFIG_CONFIG): ; |
1da177e4 | 647 | |
61277981 UM |
648 | # The actual configuration files used during the build are stored in |
649 | # include/generated/ and include/config/. Update them if .config is newer than | |
650 | # include/config/auto.conf (which mirrors .config). | |
366a5ee9 MY |
651 | # |
652 | # This exploits the 'multi-target pattern rule' trick. | |
653 | # The syncconfig should be executed only once to make all the targets. | |
654 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
911a91c3 | 655 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
3041e47e | 656 | else |
d7942413 MY |
657 | # External modules and some install targets need include/generated/autoconf.h |
658 | # and include/config/auto.conf but do not care if they are up-to-date. | |
659 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
660 | PHONY += include/config/auto.conf |
661 | ||
662 | include/config/auto.conf: | |
264a2683 | 663 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
664 | echo >&2; \ |
665 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
666 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
667 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
668 | echo >&2 ; \ | |
9ee4e336 SR |
669 | /bin/false) |
670 | ||
d7942413 | 671 | endif # may-sync-config |
9ee4e336 | 672 | endif # $(dot-config) |
1da177e4 | 673 | |
a1c48bb1 | 674 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 675 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
676 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
677 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
678 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
a1c48bb1 | 679 | |
1da177e4 | 680 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
6748cb3c BW |
681 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
682 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) | |
1da177e4 | 683 | else |
815eb71e | 684 | ifdef CONFIG_PROFILE_ALL_BRANCHES |
a76bcf55 | 685 | KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
815eb71e AB |
686 | else |
687 | KBUILD_CFLAGS += -O2 | |
688 | endif | |
1da177e4 LT |
689 | endif |
690 | ||
a76bcf55 AB |
691 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
692 | $(call cc-disable-warning,maybe-uninitialized,)) | |
693 | ||
69102311 JK |
694 | # Tell gcc to never replace conditional load with a non-conditional one |
695 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
696 | ||
d677a4d6 | 697 | include scripts/Makefile.kcov |
6b90bd4b ER |
698 | include scripts/Makefile.gcc-plugins |
699 | ||
1873e870 AK |
700 | ifdef CONFIG_READABLE_ASM |
701 | # Disable optimizations that make assembler listings hard to read. | |
702 | # reorder blocks reorders the control in the function | |
703 | # ipa clone creates specialized cloned functions | |
704 | # partial inlining inlines only parts of functions | |
705 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
706 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
707 | $(call cc-option,-fno-partial-inlining) | |
708 | endif | |
709 | ||
08f67461 | 710 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
711 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
712 | endif | |
713 | ||
2a61f474 | 714 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
715 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
716 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
717 | |
718 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 719 | |
076f421d | 720 | ifdef CONFIG_CC_IS_CLANG |
cfe17c9b | 721 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
cfe17c9b MY |
722 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
723 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
724 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
725 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
726 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
727 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
728 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
729 | # See modpost pattern 2 | |
730 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
731 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
cfe17c9b MY |
732 | else |
733 | ||
734 | # These warnings generated too much noise in a regular build. | |
735 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 736 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
cfe17c9b MY |
737 | endif |
738 | ||
0a5f4176 | 739 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 740 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 741 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 742 | else |
7e9501fd RV |
743 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
744 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
745 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
746 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
747 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
748 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 749 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 750 | endif |
7e9501fd | 751 | endif |
1da177e4 | 752 | |
2062afb4 LT |
753 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
754 | ||
1da177e4 | 755 | ifdef CONFIG_DEBUG_INFO |
866ced95 AK |
756 | ifdef CONFIG_DEBUG_INFO_SPLIT |
757 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) | |
758 | else | |
a0f97e06 | 759 | KBUILD_CFLAGS += -g |
866ced95 | 760 | endif |
2288328c | 761 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 762 | endif |
bfaf2dd3 AK |
763 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
764 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) | |
765 | endif | |
1da177e4 | 766 | |
d6f4ceb7 | 767 | ifdef CONFIG_DEBUG_INFO_REDUCED |
e82c4bb8 AK |
768 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
769 | $(call cc-option,-fno-var-tracking) | |
d6f4ceb7 AK |
770 | endif |
771 | ||
606576ce | 772 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
773 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
774 | # gcc 5 supports generating the mcount tables directly | |
775 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
776 | CC_FLAGS_FTRACE += -mrecord-mcount | |
777 | export CC_USING_RECORD_MCOUNT := 1 | |
778 | endif | |
2f4df001 VG |
779 | ifdef CONFIG_HAVE_NOP_MCOUNT |
780 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
781 | CC_FLAGS_FTRACE += -mnop-mcount | |
782 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
783 | endif | |
784 | endif | |
07d04081 | 785 | endif |
a2546fae | 786 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
787 | ifeq ($(call cc-option-yn, -mfentry),y) |
788 | CC_FLAGS_FTRACE += -mfentry | |
789 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
790 | endif | |
a2546fae | 791 | endif |
f28bc3c3 VG |
792 | export CC_FLAGS_FTRACE |
793 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
794 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 795 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 796 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
797 | BUILD_C_RECORDMCOUNT := y |
798 | export BUILD_C_RECORDMCOUNT | |
799 | endif | |
800 | endif | |
16444a8a ACM |
801 | endif |
802 | ||
91341d4b SR |
803 | # We trigger additional mismatches with less inlining |
804 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
805 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
806 | endif | |
807 | ||
90ad4052 | 808 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
809 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
810 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
811 | endif |
812 | ||
e8e69931 | 813 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 814 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 815 | |
1da177e4 | 816 | # warn about C99 declaration after statement |
a33e7ae2 | 817 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 818 | |
0bb95f80 KC |
819 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
820 | KBUILD_CFLAGS += $(call cc-option,-Wvla) | |
821 | ||
070b98bf | 822 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 823 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 824 | |
217c3e01 SR |
825 | # disable stringop warnings in gcc 8+ |
826 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
827 | ||
fe8d0a41 | 828 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 829 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 830 | |
87e0d4f0 DB |
831 | # clang sets -fmerge-all-constants by default as optimization, but this |
832 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
833 | # need to disable it here generally. | |
834 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
835 | ||
836 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
837 | # to have actual conforming behavior enabled. | |
838 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
839 | ||
3ce120b1 LT |
840 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
841 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
842 | ||
8f7f5c9f AK |
843 | # conserve stack if available |
844 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
845 | ||
fe7c36c7 JT |
846 | # Prohibit date/time macros, which would make the build non-deterministic |
847 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
848 | ||
ea8daa7b DW |
849 | # enforce correct pointer usage |
850 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
851 | ||
c834f0e8 KC |
852 | # Require designated initializers for all marked structures |
853 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
854 | ||
a73619a8 MY |
855 | # change __FILE__ to the relative path from the srctree |
856 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
857 | ||
40df759e MM |
858 | # use the deterministic mode of AR if available |
859 | KBUILD_ARFLAGS := $(call ar-option,D) | |
860 | ||
a436bb7b MY |
861 | include scripts/Makefile.kasan |
862 | include scripts/Makefile.extrawarn | |
c6d30853 | 863 | include scripts/Makefile.ubsan |
a86fe353 | 864 | |
61754c18 MM |
865 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
866 | # last assignments | |
867 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
868 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
869 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 870 | |
18991197 | 871 | # Use --build-id when available. |
0da4fabd | 872 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
6588169d | 873 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
874 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
875 | ||
5d7d18f5 | 876 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 877 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
878 | endif |
879 | ||
14516765 LVO |
880 | # insure the checker run with the right endianness |
881 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
882 | ||
1f2f01b1 LVO |
883 | # the checker needs the correct machine size |
884 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
885 | ||
1da177e4 | 886 | # Default kernel image to build when no specific target is given. |
070b98bf | 887 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
888 | # set in the environment |
889 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
890 | # this default value | |
891 | export KBUILD_IMAGE ?= vmlinux | |
892 | ||
893 | # | |
894 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
895 | # images. Default is /boot, but you can set it to other values | |
896 | export INSTALL_PATH ?= /boot | |
897 | ||
f4d4ffc0 JC |
898 | # |
899 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
900 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
901 | # an argument if needed. Otherwise it defaults to the kernel install path | |
902 | # | |
903 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
904 | ||
1da177e4 LT |
905 | # |
906 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
907 | # relocations required by build roots. This is not defined in the | |
070b98bf | 908 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
909 | # |
910 | ||
df9df036 | 911 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
912 | export MODLIB |
913 | ||
ac031f26 | 914 | # |
3fbb43df MY |
915 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
916 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
917 | # the default option --strip-debug will be used. Otherwise, | |
918 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 919 | |
ac031f26 TT |
920 | ifdef INSTALL_MOD_STRIP |
921 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 922 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 923 | else |
2ea03891 | 924 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
925 | endif # INSTALL_MOD_STRIP=1 |
926 | else | |
2ea03891 | 927 | mod_strip_cmd = true |
ac031f26 TT |
928 | endif # INSTALL_MOD_STRIP |
929 | export mod_strip_cmd | |
930 | ||
beb50df3 BJ |
931 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
932 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
933 | # or CONFIG_MODULE_COMPRESS_XZ. | |
934 | ||
935 | mod_compress_cmd = true | |
936 | ifdef CONFIG_MODULE_COMPRESS | |
937 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 938 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
939 | endif # CONFIG_MODULE_COMPRESS_GZIP |
940 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 941 | mod_compress_cmd = xz -f |
beb50df3 BJ |
942 | endif # CONFIG_MODULE_COMPRESS_XZ |
943 | endif # CONFIG_MODULE_COMPRESS | |
944 | export mod_compress_cmd | |
945 | ||
1bf49dd4 | 946 | # Select initial ramdisk compression format, default is gzip(1). |
947 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
948 | # | |
7ac18156 JB |
949 | INITRD_COMPRESS-y := gzip |
950 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
951 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
952 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
953 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
954 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
b7000ade LT |
955 | # do not export INITRD_COMPRESS, since we didn't actually |
956 | # choose a sane default compression above. | |
957 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
1da177e4 | 958 | |
d9d8d7ed | 959 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
960 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
961 | ||
962 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
963 | else |
964 | mod_sign_cmd = true | |
965 | endif | |
966 | export mod_sign_cmd | |
967 | ||
8f84f7da REB |
968 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
969 | ||
9f0c18ae JP |
970 | ifdef CONFIG_STACK_VALIDATION |
971 | has_libelf := $(call try-run,\ | |
8f84f7da | 972 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
9f0c18ae JP |
973 | ifeq ($(has_libelf),1) |
974 | objtool_target := tools/objtool FORCE | |
975 | else | |
9f0c18ae JP |
976 | SKIP_STACK_VALIDATION := 1 |
977 | export SKIP_STACK_VALIDATION | |
978 | endif | |
979 | endif | |
980 | ||
e00d8880 | 981 | PHONY += prepare0 |
e2a666d5 | 982 | |
1da177e4 | 983 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 984 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
985 | |
986 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
987 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 988 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 LT |
989 | |
990 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
37d9fe47 | 991 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
1da177e4 | 992 | |
f49821ee NP |
993 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
994 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
995 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
996 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 997 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
998 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
999 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 1000 | |
1f2bfbd0 | 1001 | # Externally visible symbols (used by link-vmlinux.sh) |
95698570 | 1002 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) |
3a166fc2 NP |
1003 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) |
1004 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
95698570 | 1005 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1006 | export LDFLAGS_vmlinux |
312a3d09 | 1007 | # used by scripts/package/Makefile |
37d9fe47 | 1008 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
9bb48247 | 1009 | |
3a166fc2 | 1010 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1011 | |
3fdc7d3f MY |
1012 | # Recurse until adjust_autoksyms.sh is satisfied |
1013 | PHONY += autoksyms_recursive | |
1014 | autoksyms_recursive: $(vmlinux-deps) | |
2441e78b | 1015 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
ba79d401 | 1016 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1017 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1018 | endif |
23121ca2 | 1019 | |
1f50b80a MY |
1020 | # For the kernel to actually contain only the needed exported symbols, |
1021 | # we have to build modules as well to determine what those symbols are. | |
1022 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1023 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1024 | KBUILD_MODULES := 1 | |
1025 | endif | |
1026 | ||
07a422bb MY |
1027 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1028 | ||
1029 | $(autoksyms_h): | |
1030 | $(Q)mkdir -p $(dir $@) | |
1031 | $(Q)touch $@ | |
23121ca2 | 1032 | |
fbe6e37d NP |
1033 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1034 | ||
1035 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1036 | cmd_link-vmlinux = \ |
d503ac53 | 1037 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1038 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1039 | |
3fdc7d3f | 1040 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
3fdc7d3f MY |
1041 | ifdef CONFIG_GDB_SCRIPTS |
1042 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1043 | endif | |
1f2bfbd0 | 1044 | +$(call if_changed,link-vmlinux) |
741f98fe | 1045 | |
392885ee MY |
1046 | targets := vmlinux |
1047 | ||
3fca1700 | 1048 | # Build samples along the rest of the kernel. This needs headers_install. |
dd92478a NP |
1049 | ifdef CONFIG_SAMPLES |
1050 | vmlinux-dirs += samples | |
3fca1700 | 1051 | samples: headers_install |
dd92478a NP |
1052 | endif |
1053 | ||
38385f8f | 1054 | # The actual objects are generated when descending, |
1da177e4 | 1055 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1056 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1057 | |
1058 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1059 | # Preset locale variables to speed up the build process. Limit locale | |
1060 | # tweaks to this spot to avoid wrong language settings when running | |
1061 | # make menuconfig etc. | |
1062 | # Error messages still appears in the original language | |
1063 | ||
4f193362 | 1064 | PHONY += $(vmlinux-dirs) |
059bc9fc | 1065 | $(vmlinux-dirs): prepare |
f7adc312 | 1066 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
1da177e4 | 1067 | |
ba97df45 | 1068 | filechk_kernel.release = \ |
0d0e7718 | 1069 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1070 | |
83a35e36 | 1071 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
2063945f | 1072 | include/config/kernel.release: $(srctree)/Makefile FORCE |
0d0e7718 | 1073 | $(call filechk,kernel.release) |
cb58455c | 1074 | |
d8821622 MY |
1075 | # Additional helpers built in scripts/ |
1076 | # Carefully list dependencies so we do not try to build scripts twice | |
1077 | # in parallel | |
1078 | PHONY += scripts | |
60df1aee | 1079 | scripts: scripts_basic scripts_dtc |
d8821622 | 1080 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1081 | |
1da177e4 | 1082 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1083 | # or the modules are listed in "prepare". |
1084 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1085 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1086 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1087 | |
e00d8880 | 1088 | PHONY += prepare archprepare prepare1 prepare2 prepare3 |
5bb78269 | 1089 | |
86feeaa8 | 1090 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1091 | # and if so do: |
1092 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1093 | prepare3: include/config/kernel.release |
1da177e4 | 1094 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 1095 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 1096 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
1097 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
1098 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
1099 | /bin/false; \ |
1100 | fi; | |
1da177e4 LT |
1101 | endif |
1102 | ||
c965b105 KC |
1103 | # prepare2 creates a makefile if using a separate output directory. |
1104 | # From this point forward, .config has been reprocessed, so any rules | |
1105 | # that need to depend on updated CONFIG_* values can be checked here. | |
2a61f474 | 1106 | prepare2: prepare3 outputmakefile asm-generic |
1da177e4 | 1107 | |
2063945f | 1108 | prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h |
7bb9d092 | 1109 | $(cmd_crmodverdir) |
1da177e4 | 1110 | |
668c35f6 | 1111 | archprepare: archheaders archscripts prepare1 scripts |
5bb78269 | 1112 | |
65bba042 | 1113 | prepare0: archprepare |
60df1aee | 1114 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1115 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1116 | |
1da177e4 | 1117 | # All the preparing.. |
b9ab5ebb JP |
1118 | prepare: prepare0 prepare-objtool |
1119 | ||
2c1f4f12 | 1120 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1121 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1122 | ||
2c1f4f12 MY |
1123 | PHONY += asm-generic uapi-asm-generic |
1124 | asm-generic: uapi-asm-generic | |
7d0e5c20 | 1125 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm |
2c1f4f12 | 1126 | uapi-asm-generic: |
7d0e5c20 | 1127 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm |
2c1f4f12 | 1128 | |
b9ab5ebb | 1129 | PHONY += prepare-objtool |
3b27a0c8 | 1130 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1131 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1132 | ifdef CONFIG_UNWINDER_ORC | |
1133 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1134 | @false | |
1135 | else | |
1136 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1137 | endif | |
1138 | endif | |
1da177e4 | 1139 | |
1da177e4 LT |
1140 | # Generate some files |
1141 | # --------------------------------------------------------------------------- | |
1142 | ||
1143 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1144 | # needs to be updated, so this check is forced on all builds | |
1145 | ||
1146 | uts_len := 64 | |
63104eec SR |
1147 | define filechk_utsrelease.h |
1148 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1149 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1150 | exit 1; \ | |
1151 | fi; \ | |
ad774086 | 1152 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1153 | endef |
1da177e4 LT |
1154 | |
1155 | define filechk_version.h | |
ad774086 | 1156 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1157 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1158 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1159 | endef |
1160 | ||
43fee2b2 | 1161 | $(version_h): FORCE |
1da177e4 | 1162 | $(call filechk,version.h) |
223c24a7 | 1163 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1164 | |
273b281f | 1165 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1166 | $(call filechk,utsrelease.h) |
1167 | ||
179efcb4 VN |
1168 | PHONY += headerdep |
1169 | headerdep: | |
9663d989 PF |
1170 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1171 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1172 | |
8d730cfb DW |
1173 | # --------------------------------------------------------------------------- |
1174 | # Kernel headers | |
8d730cfb | 1175 | |
e6883b18 SR |
1176 | #Default location for installed headers |
1177 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1178 | |
9d022c54 MY |
1179 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
1180 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
e6883b18 | 1181 | |
f7de64b7 | 1182 | PHONY += archheaders archscripts |
6520fe55 | 1183 | |
e6883b18 | 1184 | PHONY += __headers |
a9d9a400 | 1185 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
e1b702cf | 1186 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1187 | |
1188 | PHONY += headers_install_all | |
2fb9b1bd SR |
1189 | headers_install_all: |
1190 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1191 | |
8d730cfb | 1192 | PHONY += headers_install |
e6883b18 | 1193 | headers_install: __headers |
9d022c54 | 1194 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1195 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
a8ff49a1 | 1196 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
9d022c54 | 1197 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
8d730cfb | 1198 | |
1f85712e MF |
1199 | PHONY += headers_check_all |
1200 | headers_check_all: headers_install_all | |
2fb9b1bd | 1201 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1202 | |
68475359 DW |
1203 | PHONY += headers_check |
1204 | headers_check: headers_install | |
a8ff49a1 | 1205 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
9d022c54 | 1206 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
68475359 | 1207 | |
257edce6 MY |
1208 | ifdef CONFIG_HEADERS_CHECK |
1209 | all: headers_check | |
1210 | endif | |
1211 | ||
5a5da78b SK |
1212 | # --------------------------------------------------------------------------- |
1213 | # Kernel selftest | |
1214 | ||
1215 | PHONY += kselftest | |
1216 | kselftest: | |
2bc84526 | 1217 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1218 | |
801d2e9f | 1219 | PHONY += kselftest-clean |
dcb825a9 | 1220 | kselftest-clean: |
2bc84526 | 1221 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1222 | |
3d6dee7a BJZ |
1223 | PHONY += kselftest-merge |
1224 | kselftest-merge: | |
1225 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1226 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1227 | -m $(objtree)/.config \ | |
1228 | $(srctree)/tools/testing/selftests/*/config | |
1229 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1230 | ||
37c8a5fa RH |
1231 | # --------------------------------------------------------------------------- |
1232 | # Devicetree files | |
1233 | ||
1234 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1235 | dtstree := arch/$(SRCARCH)/boot/dts | |
1236 | endif | |
1237 | ||
1238 | ifneq ($(dtstree),) | |
1239 | ||
1240 | %.dtb: prepare3 scripts_dtc | |
1241 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1242 | ||
4f0e3a57 RH |
1243 | PHONY += dtbs dtbs_install dt_binding_check |
1244 | dtbs dtbs_check: prepare3 scripts_dtc | |
37c8a5fa RH |
1245 | $(Q)$(MAKE) $(build)=$(dtstree) |
1246 | ||
4f0e3a57 RH |
1247 | dtbs_check: export CHECK_DTBS=1 |
1248 | dtbs_check: dt_binding_check | |
1249 | ||
37c8a5fa RH |
1250 | dtbs_install: |
1251 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1252 | ||
1253 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1254 | all: dtbs | |
1255 | endif | |
1256 | ||
1257 | endif | |
1258 | ||
1259 | PHONY += scripts_dtc | |
1260 | scripts_dtc: scripts_basic | |
1261 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1262 | ||
4f0e3a57 RH |
1263 | dt_binding_check: scripts_dtc |
1264 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1265 | ||
1da177e4 LT |
1266 | # --------------------------------------------------------------------------- |
1267 | # Modules | |
1268 | ||
1269 | ifdef CONFIG_MODULES | |
1270 | ||
070b98bf | 1271 | # By default, build modules as well |
1da177e4 | 1272 | |
73d1393e | 1273 | all: modules |
1da177e4 | 1274 | |
3fbb43df | 1275 | # Build modules |
551559e1 | 1276 | # |
3fbb43df MY |
1277 | # A module can be listed more than once in obj-m resulting in |
1278 | # duplicate lines in modules.order files. Those are removed | |
1279 | # using awk while concatenating to the final file. | |
1da177e4 | 1280 | |
4f193362 | 1281 | PHONY += modules |
2da30e70 | 1282 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1283 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1284 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1285 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1286 | |
a6c36632 MM |
1287 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1288 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1289 | ||
2063945f | 1290 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
a6c36632 MM |
1291 | $(Q)$(MAKE) $(modbuiltin)=$* |
1292 | ||
1da177e4 LT |
1293 | |
1294 | # Target to prepare building external modules | |
4f193362 | 1295 | PHONY += modules_prepare |
059bc9fc | 1296 | modules_prepare: prepare |
1da177e4 LT |
1297 | |
1298 | # Target to install modules | |
4f193362 | 1299 | PHONY += modules_install |
1da177e4 LT |
1300 | modules_install: _modinst_ _modinst_post |
1301 | ||
4f193362 | 1302 | PHONY += _modinst_ |
2da30e70 | 1303 | _modinst_: |
1da177e4 LT |
1304 | @rm -rf $(MODLIB)/kernel |
1305 | @rm -f $(MODLIB)/source | |
1306 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1307 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1308 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1309 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1310 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1311 | fi |
551559e1 | 1312 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1313 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1314 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1315 | |
50a8ec31 | 1316 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1317 | # boot a modules.dep even before / is mounted read-write. However the |
1318 | # boot script depmod is the master version. | |
4f193362 | 1319 | PHONY += _modinst_post |
6d128e1e | 1320 | _modinst_post: _modinst_ |
50a8ec31 | 1321 | $(call cmd,depmod) |
1da177e4 | 1322 | |
d890f510 JB |
1323 | ifeq ($(CONFIG_MODULE_SIG), y) |
1324 | PHONY += modules_sign | |
1325 | modules_sign: | |
1326 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1327 | endif | |
1328 | ||
1da177e4 LT |
1329 | else # CONFIG_MODULES |
1330 | ||
1331 | # Modules not configured | |
1332 | # --------------------------------------------------------------------------- | |
1333 | ||
612e47ce MY |
1334 | PHONY += modules modules_install |
1335 | modules modules_install: | |
5369f550 MM |
1336 | @echo >&2 |
1337 | @echo >&2 "The present kernel configuration has modules disabled." | |
1338 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1339 | @echo >&2 "Then build a kernel with module support enabled." | |
1340 | @echo >&2 | |
1da177e4 LT |
1341 | @exit 1 |
1342 | ||
1343 | endif # CONFIG_MODULES | |
1344 | ||
1da177e4 LT |
1345 | ### |
1346 | # Cleaning is done on three levels. | |
1347 | # make clean Delete most generated files | |
1348 | # Leave enough to build external modules | |
1349 | # make mrproper Delete the current configuration, and all generated files | |
1350 | # make distclean Remove editor backup files, patch leftover files and the like | |
1351 | ||
1352 | # Directories & files removed with 'make clean' | |
fbfa9be9 | 1353 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
1da177e4 LT |
1354 | |
1355 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1356 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1357 | arch/*/include/generated .tmp_objdiff |
278ae604 | 1358 | MRPROPER_FILES += .config .config.old .version \ |
d5b71936 | 1359 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
fb117949 DW |
1360 | signing_key.pem signing_key.priv signing_key.x509 \ |
1361 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1362 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1363 | |
1364 | # clean - Delete most, but leave enough to build external modules | |
1365 | # | |
1366 | clean: rm-dirs := $(CLEAN_DIRS) | |
1367 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1368 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1369 | |
bd1ee804 | 1370 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1371 | $(clean-dirs): |
1372 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1373 | ||
bd1ee804 PM |
1374 | vmlinuxclean: |
1375 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1376 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1377 | |
1378 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1379 | |
1380 | # mrproper - Delete all generated files, including .config | |
1381 | # | |
1382 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1383 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1384 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1385 | |
b421b8a6 | 1386 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1387 | $(mrproper-dirs): |
1388 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1389 | ||
b421b8a6 | 1390 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1391 | $(call cmd,rmdirs) |
1392 | $(call cmd,rmfiles) | |
1393 | ||
1394 | # distclean | |
1395 | # | |
4f193362 | 1396 | PHONY += distclean |
1da177e4 LT |
1397 | |
1398 | distclean: mrproper | |
1399 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1400 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1401 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1402 | -o -name 'core' \) \ | |
1da177e4 LT |
1403 | -type f -print | xargs rm -f |
1404 | ||
1405 | ||
1406 | # Packaging of the kernel to various formats | |
1407 | # --------------------------------------------------------------------------- | |
c79624c1 | 1408 | package-dir := scripts/package |
1da177e4 | 1409 | |
bafb6747 ACM |
1410 | %src-pkg: FORCE |
1411 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1412 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1413 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1414 | |
1415 | ||
1416 | # Brief documentation of the typical targets used | |
1417 | # --------------------------------------------------------------------------- | |
1418 | ||
5dffbe81 | 1419 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1420 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1421 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1422 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1423 | |
fe69b420 | 1424 | PHONY += help |
1da177e4 LT |
1425 | help: |
1426 | @echo 'Cleaning targets:' | |
5ea084ef | 1427 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1428 | @echo ' enough build support to build external modules' |
5ea084ef | 1429 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1430 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1431 | @echo '' |
1432 | @echo 'Configuration targets:' | |
1433 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1434 | @echo '' | |
1435 | @echo 'Other generic targets:' | |
1436 | @echo ' all - Build all targets marked with [*]' | |
1437 | @echo '* vmlinux - Build the bare kernel' | |
1438 | @echo '* modules - Build all modules' | |
9cc5d74c | 1439 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1440 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1441 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1442 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1443 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1444 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1445 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1446 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1447 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1448 | @echo ' tags/TAGS - Generate tags file for editors' |
1449 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1450 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1451 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1452 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1453 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1454 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1455 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1456 | echo '' |
31b8cc80 | 1457 | @echo 'Static analysers:' |
1da177e4 LT |
1458 | @echo ' checkstack - Generate a list of stack hogs' |
1459 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1460 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1461 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1462 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1463 | @echo ' headers_check - Sanity check on exported headers' |
74425eee | 1464 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1465 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1466 | @echo '' |
31b8cc80 | 1467 | @echo 'Kernel selftest:' |
5a5da78b SK |
1468 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1469 | @echo ' Build, install, and boot kernel before' | |
1470 | @echo ' running kselftest on it' | |
dcb825a9 | 1471 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1472 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1473 | @echo ' .config.' |
5a5da78b | 1474 | @echo '' |
37c8a5fa RH |
1475 | @$(if $(dtstree), \ |
1476 | echo 'Devicetree:'; \ | |
1477 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1478 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1479 | echo '') | |
1480 | ||
31b8cc80 RD |
1481 | @echo 'Userspace tools targets:' |
1482 | @echo ' use "make tools/help"' | |
1483 | @echo ' or "cd tools; make help"' | |
1484 | @echo '' | |
1da177e4 | 1485 | @echo 'Kernel packaging:' |
6c2133e1 | 1486 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1487 | @echo '' |
1488 | @echo 'Documentation targets:' | |
cb43fb57 | 1489 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1490 | @echo '' |
01dee188 | 1491 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1492 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1493 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1494 | @echo '' |
1495 | @$(if $(boards), \ | |
1496 | $(foreach b, $(boards), \ | |
1497 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1498 | echo '') | |
5dffbe81 SB |
1499 | @$(if $(board-dirs), \ |
1500 | $(foreach b, $(board-dirs), \ | |
1501 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1502 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1503 | echo '') | |
1da177e4 LT |
1504 | |
1505 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1506 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1507 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1508 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1509 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1510 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1511 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1512 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1513 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1514 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1515 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1516 | @echo '' |
1517 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1518 | @echo 'For further info see the ./README file' | |
1519 | ||
1520 | ||
5dffbe81 SB |
1521 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1522 | ||
1523 | help-boards: $(help-board-dirs) | |
1524 | ||
fbae4d58 | 1525 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1526 | |
1527 | $(help-board-dirs): help-%: | |
1528 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1529 | @$(if $(boards-per-dir), \ | |
1530 | $(foreach b, $(boards-per-dir), \ | |
1531 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1532 | echo '') | |
1533 | ||
1534 | ||
1da177e4 LT |
1535 | # Documentation targets |
1536 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1537 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1538 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1539 | PHONY += $(DOC_TARGETS) |
1540 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1541 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 LT |
1542 | |
1543 | else # KBUILD_EXTMOD | |
1544 | ||
1545 | ### | |
1546 | # External module support. | |
1547 | # When building external modules the kernel used as basis is considered | |
1548 | # read-only, and no consistency checks are made and the make | |
1549 | # system is not used on the basis kernel. If updates are required | |
1550 | # in the basis kernel ordinary make commands (without M=...) must | |
1551 | # be used. | |
1552 | # | |
1553 | # The following are the only valid targets when building external | |
1554 | # modules. | |
1555 | # make M=dir clean Delete all automatically generated files | |
1556 | # make M=dir modules Make all modules in specified dir | |
1557 | # make M=dir Same as 'make M=dir modules' | |
1558 | # make M=dir modules_install | |
070b98bf | 1559 | # Install the modules built in the module directory |
1da177e4 LT |
1560 | # Assumes install directory is already created |
1561 | ||
1562 | # We are always building modules | |
1563 | KBUILD_MODULES := 1 | |
1da177e4 | 1564 | |
4f193362 | 1565 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1566 | $(objtree)/Module.symvers: |
1567 | @test -e $(objtree)/Module.symvers || ( \ | |
1568 | echo; \ | |
1569 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1570 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1571 | echo ) | |
1572 | ||
1573 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1574 | PHONY += $(module-dirs) modules |
e07db28e | 1575 | $(module-dirs): prepare $(objtree)/Module.symvers |
1da177e4 LT |
1576 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
1577 | ||
1578 | modules: $(module-dirs) | |
fd54f502 | 1579 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1580 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1581 | |
4f193362 | 1582 | PHONY += modules_install |
a67dc21a | 1583 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1584 | |
4f193362 PS |
1585 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1586 | PHONY += _emodinst_ | |
a67dc21a | 1587 | _emodinst_: |
a67dc21a | 1588 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1589 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1590 | |
4f193362 | 1591 | PHONY += _emodinst_post |
a67dc21a SR |
1592 | _emodinst_post: _emodinst_ |
1593 | $(call cmd,depmod) | |
1594 | ||
1da177e4 LT |
1595 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1596 | ||
4f193362 | 1597 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1598 | $(clean-dirs): |
1599 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1600 | ||
1601 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1602 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1603 | |
fe69b420 | 1604 | PHONY += help |
1da177e4 LT |
1605 | help: |
1606 | @echo ' Building external modules.' | |
1607 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1608 | @echo '' | |
1609 | @echo ' modules - default target, build the module(s)' | |
1610 | @echo ' modules_install - install the module' | |
1611 | @echo ' clean - remove generated files in module directory only' | |
1612 | @echo '' | |
06300b21 | 1613 | |
059bc9fc | 1614 | PHONY += prepare |
e07db28e MY |
1615 | prepare: |
1616 | $(cmd_crmodverdir) | |
1da177e4 LT |
1617 | endif # KBUILD_EXTMOD |
1618 | ||
88d7be03 MM |
1619 | clean: $(clean-dirs) |
1620 | $(call cmd,rmdirs) | |
1621 | $(call cmd,rmfiles) | |
43f67c98 | 1622 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1623 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1624 | -o -name '*.ko.*' \ |
1625 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1626 | -o -name '*.dwo' -o -name '*.lst' \ |
d523b255 | 1627 | -o -name '*.su' \ |
88d7be03 | 1628 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1629 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1630 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1631 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1632 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1633 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1634 | -o -name '*.ll' \ |
88d7be03 MM |
1635 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1636 | ||
1da177e4 LT |
1637 | # Generate tags for editors |
1638 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1639 | quiet_cmd_tags = GEN $@ |
1640 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1641 | |
f4ed1009 | 1642 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1643 | $(call cmd,tags) |
1644 | ||
1da177e4 LT |
1645 | # Scripts to check various things for consistency |
1646 | # --------------------------------------------------------------------------- | |
1647 | ||
279f3dd3 PF |
1648 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1649 | ||
1da177e4 | 1650 | includecheck: |
436f876c | 1651 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1652 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1653 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1654 | |
1655 | versioncheck: | |
2ee2d292 | 1656 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1657 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1658 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1659 | |
74425eee NP |
1660 | coccicheck: |
1661 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1662 | ||
1da177e4 LT |
1663 | namespacecheck: |
1664 | $(PERL) $(srctree)/scripts/namespace.pl | |
1665 | ||
295ac051 AB |
1666 | export_report: |
1667 | $(PERL) $(srctree)/scripts/export_report.pl | |
1668 | ||
c398ff00 | 1669 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1670 | |
011e3a9a JD |
1671 | # UML needs a little special treatment here. It wants to use the host |
1672 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1673 | # else wants $(ARCH), including people doing cross-builds, which means | |
1674 | # that $(SUBARCH) doesn't work here. | |
1675 | ifeq ($(ARCH), um) | |
1676 | CHECKSTACK_ARCH := $(SUBARCH) | |
1677 | else | |
1678 | CHECKSTACK_ARCH := $(ARCH) | |
1679 | endif | |
1da177e4 LT |
1680 | checkstack: |
1681 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1682 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1683 | |
7b8ea53d AW |
1684 | kernelrelease: |
1685 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1686 | |
cb58455c | 1687 | kernelversion: |
2244cbd8 | 1688 | @echo $(KERNELVERSION) |
1da177e4 | 1689 | |
c398ff00 MM |
1690 | image_name: |
1691 | @echo $(KBUILD_IMAGE) | |
1692 | ||
ea01fa9f BP |
1693 | # Clear a bunch of variables before executing the submake |
1694 | tools/: FORCE | |
bf35182f | 1695 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1696 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1697 | |
1698 | tools/%: FORCE | |
bf35182f | 1699 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1700 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1701 | |
06300b21 SR |
1702 | # Single targets |
1703 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1704 | # Single targets are compatible with: |
e1b8513d | 1705 | # - build with mixed source and output |
bc2546a6 SR |
1706 | # - build with separate output dir 'make O=...' |
1707 | # - external modules | |
1708 | # | |
1709 | # target-dir => where to store outputfile | |
1710 | # build-dir => directory in kernel source tree to use | |
1711 | ||
1712 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1713 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1714 | target-dir = $(dir $@) |
1715 | else | |
1716 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1717 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1718 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1719 | endif | |
1720 | ||
059bc9fc | 1721 | %.s: %.c prepare FORCE |
bc2546a6 | 1722 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1723 | %.i: %.c prepare FORCE |
bc2546a6 | 1724 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1725 | %.o: %.c prepare FORCE |
bc2546a6 | 1726 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1727 | %.lst: %.c prepare FORCE |
bc2546a6 | 1728 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1729 | %.s: %.S prepare FORCE |
bc2546a6 | 1730 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1731 | %.o: %.S prepare FORCE |
bc2546a6 | 1732 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1733 | %.symtypes: %.c prepare FORCE |
15fde675 | 1734 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1735 | %.ll: %.c prepare FORCE |
433db3e2 | 1736 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
06300b21 | 1737 | |
bc2546a6 | 1738 | # Modules |
059bc9fc | 1739 | /: prepare FORCE |
31110ebb SR |
1740 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1741 | $(build)=$(build-dir) | |
8e2faea8 | 1742 | # Make sure the latest headers are built for Documentation |
ddea05fa | 1743 | Documentation/ samples/: headers_install |
059bc9fc | 1744 | %/: prepare FORCE |
06300b21 | 1745 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1746 | $(build)=$(build-dir) |
059bc9fc | 1747 | %.ko: prepare FORCE |
06300b21 | 1748 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1749 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1750 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1751 | |
38385f8f | 1752 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1753 | # =========================================================================== |
1754 | ||
1755 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1756 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1757 | ||
1758 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1759 | cmd_rmfiles = rm -f $(rm-files) | |
1760 | ||