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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 | |
55922c9d | 4 | SUBLEVEL = 0 |
f17b5f06 | 5 | EXTRAVERSION = -rc4 |
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 | ||
80463f1b MY |
18 | # Do not use make's built-in rules and variables |
19 | # (this increases performance and avoids hard-to-debug behaviour) | |
20 | MAKEFLAGS += -rR | |
1da177e4 | 21 | |
c051346b | 22 | # Avoid funny character set dependencies |
06b5dc64 | 23 | unexport LC_ALL |
c051346b PA |
24 | LC_COLLATE=C |
25 | LC_NUMERIC=C | |
07105202 | 26 | export LC_COLLATE LC_NUMERIC |
c051346b | 27 | |
ab7474ea BP |
28 | # Avoid interference with shell env settings |
29 | unexport GREP_OPTIONS | |
30 | ||
1da177e4 LT |
31 | # We are using a recursive build, so we need to do a little thinking |
32 | # to get the ordering right. | |
33 | # | |
34 | # Most importantly: sub-Makefiles should only ever modify files in | |
35 | # their own directory. If in some directory we have a dependency on | |
36 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 37 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
38 | # turn into vmlinux), we will call a sub make in that other dir, and |
39 | # after that we are sure that everything which is in that other dir | |
40 | # is now up to date. | |
41 | # | |
42 | # The only cases where we need to modify files which have global | |
43 | # effects are thus separated out and done before the recursive | |
44 | # descending is started. They are now explicitly listed as the | |
45 | # prepare rule. | |
46 | ||
066b7ed9 MM |
47 | # Beautify output |
48 | # --------------------------------------------------------------------------- | |
49 | # | |
50 | # Normally, we echo the whole command before executing it. By making | |
51 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
52 | # $(quiet) to choose other forms of output instead, e.g. | |
53 | # | |
54 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
55 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
56 | # | |
57 | # If $(quiet) is empty, the whole command will be printed. | |
58 | # If it is set to "quiet_", only the short version will be printed. | |
59 | # If it is set to "silent_", nothing will be printed at all, since | |
60 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
61 | # | |
62 | # A simple variant is to prefix commands with $(Q) - that's useful | |
63 | # for commands that shall be hidden in non-verbose mode. | |
64 | # | |
65 | # $(Q)ln $@ :< | |
66 | # | |
67 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
68 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
69 | # | |
1da177e4 LT |
70 | # To put more focus on warnings, be less verbose as default |
71 | # Use 'make V=1' to see the full commands | |
72 | ||
b8b0618c CR |
73 | ifeq ("$(origin V)", "command line") |
74 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
75 | endif |
76 | ifndef KBUILD_VERBOSE | |
77 | KBUILD_VERBOSE = 0 | |
78 | endif | |
79 | ||
066b7ed9 MM |
80 | ifeq ($(KBUILD_VERBOSE),1) |
81 | quiet = | |
82 | Q = | |
83 | else | |
84 | quiet=quiet_ | |
85 | Q = @ | |
86 | endif | |
87 | ||
88 | # If the user is running make -s (silent mode), suppress echoing of | |
89 | # commands | |
90 | ||
6f0fa58e | 91 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 | 92 | quiet=silent_ |
e572d088 | 93 | tools_silent=s |
066b7ed9 | 94 | endif |
066b7ed9 MM |
95 | |
96 | export quiet Q KBUILD_VERBOSE | |
97 | ||
1da177e4 LT |
98 | # kbuild supports saving output files in a separate directory. |
99 | # To locate output files in a separate directory two syntaxes are supported. | |
100 | # In both cases the working directory must be the root of the kernel src. | |
101 | # 1) O= | |
102 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 103 | # |
1da177e4 LT |
104 | # 2) Set KBUILD_OUTPUT |
105 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
106 | # where the output files shall be placed. | |
107 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
108 | # make | |
109 | # | |
110 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
111 | # variable. | |
112 | ||
c4e6fff1 C |
113 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
114 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
1da177e4 LT |
115 | ifeq ($(KBUILD_SRC),) |
116 | ||
117 | # OK, Make called in directory where kernel src resides | |
118 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
119 | ifeq ("$(origin O)", "command line") |
120 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
121 | endif |
122 | ||
1cacc9ab SR |
123 | # Cancel implicit rules on top Makefile |
124 | $(CURDIR)/Makefile Makefile: ; | |
125 | ||
51193b76 RJ |
126 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
127 | $(error main directory cannot contain spaces nor colons) | |
128 | endif | |
129 | ||
1da177e4 | 130 | ifneq ($(KBUILD_OUTPUT),) |
1da177e4 LT |
131 | # check that the output directory actually exists |
132 | saved-output := $(KBUILD_OUTPUT) | |
028568d8 | 133 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
16f8259c | 134 | && pwd) |
1da177e4 | 135 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 136 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 137 | |
80463f1b MY |
138 | # Look for make include files relative to root of kernel src |
139 | # | |
140 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
141 | # once after the Makefile is read. It is OK since we are going to invoke | |
142 | # 'sub-make' below. | |
143 | MAKEFLAGS += --include-dir=$(CURDIR) | |
144 | ||
0b35786d MM |
145 | PHONY += $(MAKECMDGOALS) sub-make |
146 | ||
1cacc9ab | 147 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 148 | @: |
0b35786d | 149 | |
c4e6fff1 | 150 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 151 | sub-make: |
745a2543 | 152 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
aa55c8e2 | 153 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 LT |
154 | |
155 | # Leave processing to above invocation of make | |
156 | skip-makefile := 1 | |
157 | endif # ifneq ($(KBUILD_OUTPUT),) | |
158 | endif # ifeq ($(KBUILD_SRC),) | |
159 | ||
160 | # We process the rest of the Makefile if this is the final invocation of make | |
161 | ifeq ($(skip-makefile),) | |
162 | ||
7ff52571 MY |
163 | # Do not print "Entering directory ...", |
164 | # but we want to display it when entering to the output directory | |
165 | # so that IDEs/editors are able to understand relative filenames. | |
166 | MAKEFLAGS += --no-print-directory | |
167 | ||
aa55c8e2 MY |
168 | # Call a source code checker (by default, "sparse") as part of the |
169 | # C compilation. | |
170 | # | |
171 | # Use 'make C=1' to enable checking of only re-compiled files. | |
172 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
173 | # of whether they are re-compiled or not. | |
174 | # | |
036db11c C |
175 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
176 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
177 | |
178 | ifeq ("$(origin C)", "command line") | |
179 | KBUILD_CHECKSRC = $(C) | |
180 | endif | |
181 | ifndef KBUILD_CHECKSRC | |
182 | KBUILD_CHECKSRC = 0 | |
183 | endif | |
184 | ||
185 | # Use make M=dir to specify directory of external module to build | |
186 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
187 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
188 | ifdef SUBDIRS | |
0126be38 MY |
189 | $(warning ================= WARNING ================) |
190 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
191 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
192 | $(warning ==========================================) | |
aa55c8e2 MY |
193 | KBUILD_EXTMOD ?= $(SUBDIRS) |
194 | endif | |
195 | ||
196 | ifeq ("$(origin M)", "command line") | |
197 | KBUILD_EXTMOD := $(M) | |
198 | endif | |
199 | ||
9da0763b MM |
200 | ifeq ($(KBUILD_SRC),) |
201 | # building in the source tree | |
202 | srctree := . | |
203 | else | |
204 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
205 | # building in a subdirectory of the source tree | |
206 | srctree := .. | |
207 | else | |
208 | srctree := $(KBUILD_SRC) | |
209 | endif | |
210 | endif | |
2c1f4f12 MY |
211 | |
212 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
213 | ||
7e1c0477 | 214 | objtree := . |
1da177e4 LT |
215 | src := $(srctree) |
216 | obj := $(objtree) | |
217 | ||
0f558c33 | 218 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 | 219 | |
11294235 | 220 | export srctree objtree VPATH |
1da177e4 | 221 | |
2c1f4f12 MY |
222 | # To make sure we do not include .config for any of the *config targets |
223 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
224 | # It is allowed to specify more targets when calling make, including | |
225 | # mixing *config targets and build targets. | |
226 | # For example 'make oldconfig all'. | |
227 | # Detect when mixed targets is specified, and make a second invocation | |
228 | # of make so .config is not included in this case either (for *config). | |
229 | ||
230 | version_h := include/generated/uapi/linux/version.h | |
231 | old_version_h := include/linux/version.h | |
232 | ||
22340a06 MY |
233 | clean-targets := %clean mrproper cleandocs |
234 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 MY |
235 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
236 | $(version_h) headers_% archheaders archscripts \ | |
63e31a67 | 237 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
238 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
239 | kernelrelease | |
2c1f4f12 | 240 | |
d7942413 MY |
241 | config-targets := 0 |
242 | mixed-targets := 0 | |
243 | dot-config := 1 | |
244 | may-sync-config := 1 | |
2c1f4f12 MY |
245 | |
246 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
247 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
248 | dot-config := 0 | |
249 | endif | |
250 | endif | |
251 | ||
d7942413 MY |
252 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
253 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
254 | may-sync-config := 0 | |
255 | endif | |
256 | endif | |
257 | ||
258 | ifneq ($(KBUILD_EXTMOD),) | |
259 | may-sync-config := 0 | |
260 | endif | |
261 | ||
2c1f4f12 MY |
262 | ifeq ($(KBUILD_EXTMOD),) |
263 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
264 | config-targets := 1 | |
265 | ifneq ($(words $(MAKECMDGOALS)),1) | |
266 | mixed-targets := 1 | |
267 | endif | |
268 | endif | |
269 | endif | |
22340a06 MY |
270 | |
271 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
272 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
273 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
274 | mixed-targets := 1 | |
275 | endif | |
276 | endif | |
277 | ||
2c1f4f12 MY |
278 | # install and modules_install need also be processed one by one |
279 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
280 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
281 | mixed-targets := 1 | |
282 | endif | |
283 | endif | |
284 | ||
285 | ifeq ($(mixed-targets),1) | |
286 | # =========================================================================== | |
287 | # We're called with mixed targets (*config and build targets). | |
288 | # Handle them one by one. | |
289 | ||
290 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
291 | ||
292 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
293 | @: | |
294 | ||
295 | __build_one_by_one: | |
296 | $(Q)set -e; \ | |
297 | for i in $(MAKECMDGOALS); do \ | |
298 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
299 | done | |
300 | ||
301 | else | |
302 | ||
303 | # We need some generic definitions (do not try to remake the file). | |
304 | scripts/Kbuild.include: ; | |
305 | include scripts/Kbuild.include | |
306 | ||
307 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
308 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
309 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
310 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
311 | ||
b2d35fa5 | 312 | include scripts/subarch.include |
1da177e4 LT |
313 | |
314 | # Cross compiling and selecting different set of gcc/bin-utils | |
315 | # --------------------------------------------------------------------------- | |
316 | # | |
317 | # When performing cross compilation for other architectures ARCH shall be set | |
318 | # to the target architecture. (See arch/* for the possibilities). | |
319 | # ARCH can be set during invocation of make: | |
320 | # make ARCH=ia64 | |
321 | # Another way is to have ARCH set in the environment. | |
322 | # The default ARCH is the host where make is executed. | |
323 | ||
324 | # CROSS_COMPILE specify the prefix used for all executables used | |
325 | # during compilation. Only gcc and related bin-utils executables | |
326 | # are prefixed with $(CROSS_COMPILE). | |
327 | # CROSS_COMPILE can be set on the command line | |
328 | # make CROSS_COMPILE=ia64-linux- | |
329 | # Alternatively CROSS_COMPILE can be set in the environment. | |
330 | # Default value for CROSS_COMPILE is not to prefix executables | |
331 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 332 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
333 | |
334 | # Architecture as present in compile.h | |
6752ed90 TG |
335 | UTS_MACHINE := $(ARCH) |
336 | SRCARCH := $(ARCH) | |
1da177e4 | 337 | |
d746d647 SR |
338 | # Additional ARCH settings for x86 |
339 | ifeq ($(ARCH),i386) | |
340 | SRCARCH := x86 | |
341 | endif | |
342 | ifeq ($(ARCH),x86_64) | |
343 | SRCARCH := x86 | |
344 | endif | |
74b469f2 | 345 | |
5e538790 | 346 | # Additional ARCH settings for sparc |
e69f58c0 NK |
347 | ifeq ($(ARCH),sparc32) |
348 | SRCARCH := sparc | |
349 | endif | |
a439fe51 | 350 | ifeq ($(ARCH),sparc64) |
5e538790 | 351 | SRCARCH := sparc |
a439fe51 | 352 | endif |
2fb9b1bd | 353 | |
3cc000b5 PM |
354 | # Additional ARCH settings for sh |
355 | ifeq ($(ARCH),sh64) | |
356 | SRCARCH := sh | |
357 | endif | |
358 | ||
14cdd3c4 | 359 | KCONFIG_CONFIG ?= .config |
41263fc6 | 360 | export KCONFIG_CONFIG |
14cdd3c4 | 361 | |
1da177e4 LT |
362 | # SHELL used by kbuild |
363 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
364 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
365 | else echo sh; fi ; fi) | |
366 | ||
6d79a7b4 MY |
367 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
368 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
369 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 370 | |
070b98bf SR |
371 | HOSTCC = gcc |
372 | HOSTCXX = g++ | |
96f14fe7 | 373 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
374 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
375 | $(HOSTCFLAGS) | |
376 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
377 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
378 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 379 | |
1da177e4 | 380 | # Make variables (CC, etc...) |
1da177e4 LT |
381 | AS = $(CROSS_COMPILE)as |
382 | LD = $(CROSS_COMPILE)ld | |
383 | CC = $(CROSS_COMPILE)gcc | |
384 | CPP = $(CC) -E | |
385 | AR = $(CROSS_COMPILE)ar | |
386 | NM = $(CROSS_COMPILE)nm | |
387 | STRIP = $(CROSS_COMPILE)strip | |
388 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
389 | OBJDUMP = $(CROSS_COMPILE)objdump | |
73a4f6db MY |
390 | LEX = flex |
391 | YACC = bison | |
1da177e4 LT |
392 | AWK = awk |
393 | GENKSYMS = scripts/genksyms/genksyms | |
caa27b66 | 394 | INSTALLKERNEL := installkernel |
1da177e4 | 395 | DEPMOD = /sbin/depmod |
1da177e4 | 396 | PERL = perl |
011bf125 | 397 | PYTHON = python |
e9781b52 MY |
398 | PYTHON2 = python2 |
399 | PYTHON3 = python3 | |
1da177e4 LT |
400 | CHECK = sparse |
401 | ||
80a7d1d9 | 402 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 403 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
b36fad65 | 404 | NOSTDINC_FLAGS = |
6588169d SR |
405 | CFLAGS_MODULE = |
406 | AFLAGS_MODULE = | |
407 | LDFLAGS_MODULE = | |
1da177e4 LT |
408 | CFLAGS_KERNEL = |
409 | AFLAGS_KERNEL = | |
b36fad65 | 410 | LDFLAGS_vmlinux = |
1da177e4 | 411 | |
abbf1590 DH |
412 | # Use USERINCLUDE when you must reference the UAPI directories only. |
413 | USERINCLUDE := \ | |
9d022c54 MY |
414 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
415 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 416 | -I$(srctree)/include/uapi \ |
3308b285 | 417 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
418 | -include $(srctree)/include/linux/kconfig.h |
419 | ||
1da177e4 LT |
420 | # Use LINUXINCLUDE when you must reference the include/ directory. |
421 | # Needed to be compatible with the O= option | |
abbf1590 | 422 | LINUXINCLUDE := \ |
9d022c54 MY |
423 | -I$(srctree)/arch/$(SRCARCH)/include \ |
424 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
abbf1590 | 425 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
f8224f7f MY |
426 | -I$(objtree)/include \ |
427 | $(USERINCLUDE) | |
1da177e4 | 428 | |
42a92bcc | 429 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 430 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 431 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
61a0902a | 432 | -Werror-implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 433 | -Wno-format-security \ |
433dc2eb MY |
434 | -std=gnu89 |
435 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
436 | KBUILD_AFLAGS_KERNEL := |
437 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
438 | KBUILD_AFLAGS_MODULE := -DMODULE |
439 | KBUILD_CFLAGS_MODULE := -DMODULE | |
440 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
d503ac53 | 441 | KBUILD_LDFLAGS := |
433dc2eb | 442 | GCC_PLUGINS_CFLAGS := |
1da177e4 | 443 | |
96f14fe7 | 444 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
8377bd2b | 445 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
e9781b52 | 446 | export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
10844aeb | 447 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 448 | |
d503ac53 | 449 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
450 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
451 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 452 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 453 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 454 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 455 | export KBUILD_ARFLAGS |
1da177e4 LT |
456 | |
457 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
458 | # tree rather than in the kernel tree. The kernel tree might | |
459 | # even be read-only. | |
460 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
461 | ||
1da177e4 LT |
462 | # Files to ignore in find ... statements |
463 | ||
ae63b2d7 PB |
464 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
465 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
466 | -prune -o | |
450c6076 JJ |
467 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
468 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
469 | |
470 | # =========================================================================== | |
471 | # Rules shared between *config targets and build targets | |
472 | ||
312a3d09 | 473 | # Basic helpers built in scripts/basic/ |
4f193362 | 474 | PHONY += scripts_basic |
1da177e4 LT |
475 | scripts_basic: |
476 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 477 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 478 | |
cd05e6bd JB |
479 | # To avoid any implicit rule to kick in, define an empty command. |
480 | scripts/basic/%: scripts_basic ; | |
481 | ||
4f193362 | 482 | PHONY += outputmakefile |
fd5f0cd6 JB |
483 | # outputmakefile generates a Makefile in the output directory, if using a |
484 | # separate output directory. This allows convenient use of make in the | |
485 | # output directory. | |
3a51ff34 VK |
486 | # At the same time when output Makefile generated, generate .gitignore to |
487 | # ignore whole output directory | |
1da177e4 | 488 | outputmakefile: |
fd5f0cd6 | 489 | ifneq ($(KBUILD_SRC),) |
92979997 | 490 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 491 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
3a51ff34 | 492 | $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
fd5f0cd6 | 493 | endif |
1da177e4 | 494 | |
99516742 | 495 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 496 | ifneq ($(CROSS_COMPILE),) |
238bcbc4 | 497 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 498 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
238bcbc4 | 499 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
ef8c4ed9 | 500 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
501 | endif |
502 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 503 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 504 | endif |
238bcbc4 MY |
505 | CLANG_FLAGS += -no-integrated-as |
506 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
507 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 508 | export CLANG_FLAGS |
ae6b289a CF |
509 | endif |
510 | ||
d5028ba8 | 511 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
2e549b2e | 512 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
d5028ba8 | 513 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
2e549b2e | 514 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
d5028ba8 | 515 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
2e549b2e | 516 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
d5028ba8 | 517 | export RETPOLINE_CFLAGS |
2e549b2e | 518 | export RETPOLINE_VDSO_CFLAGS |
d5028ba8 | 519 | |
315bab4e MY |
520 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
521 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
522 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
523 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
524 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) | |
525 | ||
1da177e4 LT |
526 | ifeq ($(config-targets),1) |
527 | # =========================================================================== | |
528 | # *config targets only - make sure prerequisites are updated, and descend | |
529 | # in scripts/kconfig to make the *config target | |
530 | ||
531 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
532 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
533 | # used for 'make defconfig' | |
a436bb7b | 534 | include arch/$(SRCARCH)/Makefile |
315bab4e | 535 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 536 | |
31110ebb | 537 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
538 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
539 | ||
540 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
541 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
542 | ||
543 | else | |
544 | # =========================================================================== | |
545 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
546 | # targets and others. In general all targets except *config targets. | |
547 | ||
2c1f4f12 MY |
548 | # If building an external module we do not care about the all: rule |
549 | # but instead _all depend on modules | |
550 | PHONY += all | |
551 | ifeq ($(KBUILD_EXTMOD),) | |
552 | _all: all | |
553 | else | |
554 | _all: modules | |
555 | endif | |
556 | ||
557 | # Decide whether to build built-in, modular, or both. | |
558 | # Normally, just do built-in. | |
559 | ||
560 | KBUILD_MODULES := | |
561 | KBUILD_BUILTIN := 1 | |
562 | ||
563 | # If we have only "make modules", don't compile built-in objects. | |
564 | # When we're building modules with modversions, we need to consider | |
565 | # the built-in objects during the descend as well, in order to | |
566 | # make sure the checksums are up to date before we record them. | |
567 | ||
568 | ifeq ($(MAKECMDGOALS),modules) | |
569 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
570 | endif | |
571 | ||
572 | # If we have "make <whatever> modules", compile modules | |
573 | # in addition to whatever we do anyway. | |
574 | # Just "make" or "make all" shall build modules as well | |
575 | ||
576 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
577 | KBUILD_MODULES := 1 | |
578 | endif | |
579 | ||
580 | ifeq ($(MAKECMDGOALS),) | |
581 | KBUILD_MODULES := 1 | |
582 | endif | |
583 | ||
584 | export KBUILD_MODULES KBUILD_BUILTIN | |
585 | ||
1da177e4 | 586 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
587 | # Objects we will link into vmlinux / subdirs we need to visit |
588 | init-y := init/ | |
df85b2d7 | 589 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
590 | net-y := net/ |
591 | libs-y := lib/ | |
592 | core-y := usr/ | |
37d9fe47 | 593 | virt-y := virt/ |
1da177e4 LT |
594 | endif # KBUILD_EXTMOD |
595 | ||
596 | ifeq ($(dot-config),1) | |
0a16d2e8 | 597 | include include/config/auto.conf |
315bab4e MY |
598 | endif |
599 | ||
600 | # The all: target is the default when no target is given on the | |
601 | # command line. | |
602 | # This allow a user to issue only 'make' to build a kernel including modules | |
603 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
604 | all: vmlinux | |
605 | ||
606 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
607 | $(call cc-option,-fno-tree-loop-im) \ | |
608 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 609 | export CFLAGS_GCOV |
315bab4e | 610 | |
b1f4ff74 PZ |
611 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
612 | ifdef CONFIG_FUNCTION_TRACER | |
613 | CC_FLAGS_FTRACE := -pg | |
614 | endif | |
615 | ||
315bab4e MY |
616 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
617 | # values of the respective KBUILD_* variables | |
618 | ARCH_CPPFLAGS := | |
619 | ARCH_AFLAGS := | |
620 | ARCH_CFLAGS := | |
621 | include arch/$(SRCARCH)/Makefile | |
1da177e4 | 622 | |
315bab4e | 623 | ifeq ($(dot-config),1) |
d7942413 | 624 | ifeq ($(may-sync-config),1) |
315bab4e MY |
625 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
626 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
627 | # because some architectures define CROSS_COMPILE there. | |
c955ccaf | 628 | -include include/config/auto.conf.cmd |
1da177e4 | 629 | |
1da177e4 | 630 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 631 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 632 | |
61277981 UM |
633 | # The actual configuration files used during the build are stored in |
634 | # include/generated/ and include/config/. Update them if .config is newer than | |
635 | # include/config/auto.conf (which mirrors .config). | |
bc081dd6 | 636 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
911a91c3 | 637 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
3041e47e | 638 | else |
d7942413 MY |
639 | # External modules and some install targets need include/generated/autoconf.h |
640 | # and include/config/auto.conf but do not care if they are up-to-date. | |
641 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
642 | PHONY += include/config/auto.conf |
643 | ||
644 | include/config/auto.conf: | |
264a2683 | 645 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
646 | echo >&2; \ |
647 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
648 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
649 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
650 | echo >&2 ; \ | |
9ee4e336 SR |
651 | /bin/false) |
652 | ||
d7942413 | 653 | endif # may-sync-config |
9ee4e336 | 654 | endif # $(dot-config) |
1da177e4 | 655 | |
a1c48bb1 | 656 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 657 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
658 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
659 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
660 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
a1c48bb1 | 661 | |
1da177e4 | 662 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
6748cb3c BW |
663 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
664 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) | |
1da177e4 | 665 | else |
815eb71e | 666 | ifdef CONFIG_PROFILE_ALL_BRANCHES |
a76bcf55 | 667 | KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
815eb71e AB |
668 | else |
669 | KBUILD_CFLAGS += -O2 | |
670 | endif | |
1da177e4 LT |
671 | endif |
672 | ||
a76bcf55 AB |
673 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
674 | $(call cc-disable-warning,maybe-uninitialized,)) | |
675 | ||
69102311 JK |
676 | # Tell gcc to never replace conditional load with a non-conditional one |
677 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
678 | ||
d677a4d6 | 679 | include scripts/Makefile.kcov |
6b90bd4b ER |
680 | include scripts/Makefile.gcc-plugins |
681 | ||
1873e870 AK |
682 | ifdef CONFIG_READABLE_ASM |
683 | # Disable optimizations that make assembler listings hard to read. | |
684 | # reorder blocks reorders the control in the function | |
685 | # ipa clone creates specialized cloned functions | |
686 | # partial inlining inlines only parts of functions | |
687 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
688 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
689 | $(call cc-option,-fno-partial-inlining) | |
690 | endif | |
691 | ||
08f67461 | 692 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
693 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
694 | endif | |
695 | ||
2a61f474 | 696 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
697 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
698 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
699 | |
700 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 701 | |
076f421d | 702 | ifdef CONFIG_CC_IS_CLANG |
cfe17c9b | 703 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
cfe17c9b MY |
704 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
705 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
706 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
707 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
708 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
709 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
710 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
711 | # See modpost pattern 2 | |
712 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
713 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
cfe17c9b MY |
714 | else |
715 | ||
716 | # These warnings generated too much noise in a regular build. | |
717 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 718 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
cfe17c9b MY |
719 | endif |
720 | ||
0a5f4176 | 721 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 722 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 723 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 724 | else |
7e9501fd RV |
725 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
726 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
727 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
728 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
729 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
730 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 731 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 732 | endif |
7e9501fd | 733 | endif |
1da177e4 | 734 | |
1e88e415 | 735 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 736 | |
1da177e4 | 737 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 738 | ifdef CONFIG_DEBUG_INFO_SPLIT |
1e88e415 | 739 | DEBUG_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) |
866ced95 | 740 | else |
1e88e415 | 741 | DEBUG_CFLAGS += -g |
866ced95 | 742 | endif |
2288328c | 743 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 744 | endif |
bfaf2dd3 | 745 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
1e88e415 | 746 | DEBUG_CFLAGS += $(call cc-option, -gdwarf-4,) |
bfaf2dd3 | 747 | endif |
1da177e4 | 748 | |
d6f4ceb7 | 749 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 750 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 751 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
752 | endif |
753 | ||
1e88e415 MY |
754 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
755 | export DEBUG_CFLAGS | |
756 | ||
606576ce | 757 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
758 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
759 | # gcc 5 supports generating the mcount tables directly | |
760 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
761 | CC_FLAGS_FTRACE += -mrecord-mcount | |
762 | export CC_USING_RECORD_MCOUNT := 1 | |
763 | endif | |
2f4df001 VG |
764 | ifdef CONFIG_HAVE_NOP_MCOUNT |
765 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
766 | CC_FLAGS_FTRACE += -mnop-mcount | |
767 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
768 | endif | |
769 | endif | |
07d04081 | 770 | endif |
a2546fae | 771 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
772 | ifeq ($(call cc-option-yn, -mfentry),y) |
773 | CC_FLAGS_FTRACE += -mfentry | |
774 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
775 | endif | |
a2546fae | 776 | endif |
f28bc3c3 VG |
777 | export CC_FLAGS_FTRACE |
778 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
779 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 780 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 781 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
782 | BUILD_C_RECORDMCOUNT := y |
783 | export BUILD_C_RECORDMCOUNT | |
784 | endif | |
785 | endif | |
16444a8a ACM |
786 | endif |
787 | ||
91341d4b SR |
788 | # We trigger additional mismatches with less inlining |
789 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
790 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
791 | endif | |
792 | ||
90ad4052 | 793 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
794 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
795 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
796 | endif |
797 | ||
e8e69931 | 798 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 799 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 800 | |
1da177e4 | 801 | # warn about C99 declaration after statement |
a33e7ae2 | 802 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 803 | |
0bb95f80 KC |
804 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
805 | KBUILD_CFLAGS += $(call cc-option,-Wvla) | |
806 | ||
070b98bf | 807 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 808 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 809 | |
217c3e01 SR |
810 | # disable stringop warnings in gcc 8+ |
811 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
812 | ||
fe8d0a41 | 813 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 814 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 815 | |
87e0d4f0 DB |
816 | # clang sets -fmerge-all-constants by default as optimization, but this |
817 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
818 | # need to disable it here generally. | |
819 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
820 | ||
821 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
822 | # to have actual conforming behavior enabled. | |
823 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
824 | ||
3ce120b1 LT |
825 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
826 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
827 | ||
8f7f5c9f AK |
828 | # conserve stack if available |
829 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
830 | ||
fe7c36c7 JT |
831 | # Prohibit date/time macros, which would make the build non-deterministic |
832 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
833 | ||
ea8daa7b DW |
834 | # enforce correct pointer usage |
835 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
836 | ||
c834f0e8 KC |
837 | # Require designated initializers for all marked structures |
838 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
839 | ||
a73619a8 MY |
840 | # change __FILE__ to the relative path from the srctree |
841 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
842 | ||
40df759e MM |
843 | # use the deterministic mode of AR if available |
844 | KBUILD_ARFLAGS := $(call ar-option,D) | |
845 | ||
a436bb7b MY |
846 | include scripts/Makefile.kasan |
847 | include scripts/Makefile.extrawarn | |
c6d30853 | 848 | include scripts/Makefile.ubsan |
a86fe353 | 849 | |
61754c18 MM |
850 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
851 | # last assignments | |
852 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
853 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
854 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 855 | |
18991197 | 856 | # Use --build-id when available. |
0da4fabd | 857 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
6588169d | 858 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
859 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
860 | ||
5d7d18f5 | 861 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 862 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
863 | endif |
864 | ||
14516765 LVO |
865 | # insure the checker run with the right endianness |
866 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
867 | ||
1f2f01b1 LVO |
868 | # the checker needs the correct machine size |
869 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
870 | ||
1da177e4 | 871 | # Default kernel image to build when no specific target is given. |
070b98bf | 872 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
873 | # set in the environment |
874 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
875 | # this default value | |
876 | export KBUILD_IMAGE ?= vmlinux | |
877 | ||
878 | # | |
879 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
880 | # images. Default is /boot, but you can set it to other values | |
881 | export INSTALL_PATH ?= /boot | |
882 | ||
f4d4ffc0 JC |
883 | # |
884 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
885 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
886 | # an argument if needed. Otherwise it defaults to the kernel install path | |
887 | # | |
888 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
889 | ||
1da177e4 LT |
890 | # |
891 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
892 | # relocations required by build roots. This is not defined in the | |
070b98bf | 893 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
894 | # |
895 | ||
df9df036 | 896 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
897 | export MODLIB |
898 | ||
ac031f26 | 899 | # |
3fbb43df MY |
900 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
901 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
902 | # the default option --strip-debug will be used. Otherwise, | |
903 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 904 | |
ac031f26 TT |
905 | ifdef INSTALL_MOD_STRIP |
906 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 907 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 908 | else |
2ea03891 | 909 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
910 | endif # INSTALL_MOD_STRIP=1 |
911 | else | |
2ea03891 | 912 | mod_strip_cmd = true |
ac031f26 TT |
913 | endif # INSTALL_MOD_STRIP |
914 | export mod_strip_cmd | |
915 | ||
beb50df3 BJ |
916 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
917 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
918 | # or CONFIG_MODULE_COMPRESS_XZ. | |
919 | ||
920 | mod_compress_cmd = true | |
921 | ifdef CONFIG_MODULE_COMPRESS | |
922 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 923 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
924 | endif # CONFIG_MODULE_COMPRESS_GZIP |
925 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 926 | mod_compress_cmd = xz -f |
beb50df3 BJ |
927 | endif # CONFIG_MODULE_COMPRESS_XZ |
928 | endif # CONFIG_MODULE_COMPRESS | |
929 | export mod_compress_cmd | |
930 | ||
1bf49dd4 | 931 | # Select initial ramdisk compression format, default is gzip(1). |
932 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
933 | # | |
7ac18156 JB |
934 | INITRD_COMPRESS-y := gzip |
935 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
936 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
937 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
938 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
939 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
b7000ade LT |
940 | # do not export INITRD_COMPRESS, since we didn't actually |
941 | # choose a sane default compression above. | |
942 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
1da177e4 | 943 | |
d9d8d7ed | 944 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
945 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
946 | ||
947 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
948 | else |
949 | mod_sign_cmd = true | |
950 | endif | |
951 | export mod_sign_cmd | |
952 | ||
9f0c18ae JP |
953 | ifdef CONFIG_STACK_VALIDATION |
954 | has_libelf := $(call try-run,\ | |
955 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) | |
956 | ifeq ($(has_libelf),1) | |
957 | objtool_target := tools/objtool FORCE | |
958 | else | |
9f0c18ae JP |
959 | SKIP_STACK_VALIDATION := 1 |
960 | export SKIP_STACK_VALIDATION | |
961 | endif | |
962 | endif | |
963 | ||
e00d8880 | 964 | PHONY += prepare0 |
e2a666d5 | 965 | |
1da177e4 | 966 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 967 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
968 | |
969 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
970 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 971 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 LT |
972 | |
973 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
37d9fe47 | 974 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
1da177e4 | 975 | |
f49821ee NP |
976 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
977 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
978 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
979 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 980 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
981 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
982 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 983 | |
1f2bfbd0 | 984 | # Externally visible symbols (used by link-vmlinux.sh) |
d151e971 MY |
985 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
986 | $(drivers-y) $(net-y) $(virt-y) | |
3a166fc2 | 987 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
95698570 | 988 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 989 | export LDFLAGS_vmlinux |
312a3d09 | 990 | # used by scripts/package/Makefile |
37d9fe47 | 991 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
9bb48247 | 992 | |
d151e971 | 993 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 994 | |
3fdc7d3f MY |
995 | # Recurse until adjust_autoksyms.sh is satisfied |
996 | PHONY += autoksyms_recursive | |
997 | autoksyms_recursive: $(vmlinux-deps) | |
2441e78b | 998 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
ba79d401 | 999 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1000 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1001 | endif |
23121ca2 | 1002 | |
1f50b80a MY |
1003 | # For the kernel to actually contain only the needed exported symbols, |
1004 | # we have to build modules as well to determine what those symbols are. | |
1005 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1006 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1007 | KBUILD_MODULES := 1 | |
1008 | endif | |
1009 | ||
07a422bb MY |
1010 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1011 | ||
1012 | $(autoksyms_h): | |
1013 | $(Q)mkdir -p $(dir $@) | |
1014 | $(Q)touch $@ | |
23121ca2 | 1015 | |
fbe6e37d NP |
1016 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1017 | ||
1018 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1019 | cmd_link-vmlinux = \ |
d503ac53 | 1020 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1021 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1022 | |
3fdc7d3f | 1023 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
3fdc7d3f MY |
1024 | ifdef CONFIG_GDB_SCRIPTS |
1025 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1026 | endif | |
1f2bfbd0 | 1027 | +$(call if_changed,link-vmlinux) |
741f98fe | 1028 | |
392885ee MY |
1029 | targets := vmlinux |
1030 | ||
3fca1700 | 1031 | # Build samples along the rest of the kernel. This needs headers_install. |
dd92478a NP |
1032 | ifdef CONFIG_SAMPLES |
1033 | vmlinux-dirs += samples | |
3fca1700 | 1034 | samples: headers_install |
dd92478a NP |
1035 | endif |
1036 | ||
38385f8f | 1037 | # The actual objects are generated when descending, |
1da177e4 | 1038 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1039 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1040 | |
1041 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1042 | # Preset locale variables to speed up the build process. Limit locale | |
1043 | # tweaks to this spot to avoid wrong language settings when running | |
1044 | # make menuconfig etc. | |
1045 | # Error messages still appears in the original language | |
1046 | ||
4f193362 | 1047 | PHONY += $(vmlinux-dirs) |
059bc9fc | 1048 | $(vmlinux-dirs): prepare |
f7adc312 | 1049 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
1da177e4 | 1050 | |
ba97df45 | 1051 | filechk_kernel.release = \ |
0d0e7718 | 1052 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1053 | |
83a35e36 | 1054 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
2063945f | 1055 | include/config/kernel.release: $(srctree)/Makefile FORCE |
0d0e7718 | 1056 | $(call filechk,kernel.release) |
cb58455c | 1057 | |
d8821622 MY |
1058 | # Additional helpers built in scripts/ |
1059 | # Carefully list dependencies so we do not try to build scripts twice | |
1060 | # in parallel | |
1061 | PHONY += scripts | |
60df1aee | 1062 | scripts: scripts_basic scripts_dtc |
d8821622 | 1063 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1064 | |
1da177e4 | 1065 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1066 | # or the modules are listed in "prepare". |
1067 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1068 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1069 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1070 | |
4f1c1008 | 1071 | PHONY += prepare archprepare prepare1 prepare3 |
5bb78269 | 1072 | |
86feeaa8 | 1073 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1074 | # and if so do: |
1075 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1076 | prepare3: include/config/kernel.release |
1da177e4 | 1077 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 1078 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 1079 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
1080 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
1081 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
1082 | /bin/false; \ |
1083 | fi; | |
1da177e4 LT |
1084 | endif |
1085 | ||
4f1c1008 MY |
1086 | prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ |
1087 | include/generated/utsrelease.h | |
7bb9d092 | 1088 | $(cmd_crmodverdir) |
1da177e4 | 1089 | |
668c35f6 | 1090 | archprepare: archheaders archscripts prepare1 scripts |
5bb78269 | 1091 | |
65bba042 | 1092 | prepare0: archprepare |
60df1aee | 1093 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1094 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1095 | |
1da177e4 | 1096 | # All the preparing.. |
b9ab5ebb JP |
1097 | prepare: prepare0 prepare-objtool |
1098 | ||
2c1f4f12 | 1099 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1100 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1101 | ||
2c1f4f12 MY |
1102 | PHONY += asm-generic uapi-asm-generic |
1103 | asm-generic: uapi-asm-generic | |
7d0e5c20 | 1104 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm |
2c1f4f12 | 1105 | uapi-asm-generic: |
7d0e5c20 | 1106 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm |
2c1f4f12 | 1107 | |
b9ab5ebb | 1108 | PHONY += prepare-objtool |
3b27a0c8 | 1109 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1110 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1111 | ifdef CONFIG_UNWINDER_ORC | |
1112 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1113 | @false | |
1114 | else | |
1115 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1116 | endif | |
1117 | endif | |
1da177e4 | 1118 | |
1da177e4 LT |
1119 | # Generate some files |
1120 | # --------------------------------------------------------------------------- | |
1121 | ||
1122 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1123 | # needs to be updated, so this check is forced on all builds | |
1124 | ||
1125 | uts_len := 64 | |
63104eec SR |
1126 | define filechk_utsrelease.h |
1127 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1128 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1129 | exit 1; \ | |
1130 | fi; \ | |
ad774086 | 1131 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1132 | endef |
1da177e4 LT |
1133 | |
1134 | define filechk_version.h | |
ad774086 | 1135 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1136 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1137 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1138 | endef |
1139 | ||
43fee2b2 | 1140 | $(version_h): FORCE |
1da177e4 | 1141 | $(call filechk,version.h) |
223c24a7 | 1142 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1143 | |
273b281f | 1144 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1145 | $(call filechk,utsrelease.h) |
1146 | ||
179efcb4 VN |
1147 | PHONY += headerdep |
1148 | headerdep: | |
9663d989 PF |
1149 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1150 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1151 | |
8d730cfb DW |
1152 | # --------------------------------------------------------------------------- |
1153 | # Kernel headers | |
8d730cfb | 1154 | |
e6883b18 SR |
1155 | #Default location for installed headers |
1156 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1157 | |
9d022c54 MY |
1158 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
1159 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
e6883b18 | 1160 | |
f7de64b7 | 1161 | PHONY += archheaders archscripts |
6520fe55 | 1162 | |
e6883b18 | 1163 | PHONY += __headers |
a9d9a400 | 1164 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
e1b702cf | 1165 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1166 | |
1167 | PHONY += headers_install_all | |
2fb9b1bd SR |
1168 | headers_install_all: |
1169 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1170 | |
8d730cfb | 1171 | PHONY += headers_install |
e6883b18 | 1172 | headers_install: __headers |
9d022c54 | 1173 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1174 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
a8ff49a1 | 1175 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
9d022c54 | 1176 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
8d730cfb | 1177 | |
1f85712e MF |
1178 | PHONY += headers_check_all |
1179 | headers_check_all: headers_install_all | |
2fb9b1bd | 1180 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1181 | |
68475359 DW |
1182 | PHONY += headers_check |
1183 | headers_check: headers_install | |
a8ff49a1 | 1184 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
9d022c54 | 1185 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
68475359 | 1186 | |
257edce6 MY |
1187 | ifdef CONFIG_HEADERS_CHECK |
1188 | all: headers_check | |
1189 | endif | |
1190 | ||
5a5da78b SK |
1191 | # --------------------------------------------------------------------------- |
1192 | # Kernel selftest | |
1193 | ||
1194 | PHONY += kselftest | |
1195 | kselftest: | |
2bc84526 | 1196 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1197 | |
801d2e9f | 1198 | PHONY += kselftest-clean |
dcb825a9 | 1199 | kselftest-clean: |
2bc84526 | 1200 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1201 | |
3d6dee7a BJZ |
1202 | PHONY += kselftest-merge |
1203 | kselftest-merge: | |
1204 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1205 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1206 | -m $(objtree)/.config \ | |
1207 | $(srctree)/tools/testing/selftests/*/config | |
1208 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1209 | ||
37c8a5fa RH |
1210 | # --------------------------------------------------------------------------- |
1211 | # Devicetree files | |
1212 | ||
1213 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1214 | dtstree := arch/$(SRCARCH)/boot/dts | |
1215 | endif | |
1216 | ||
1217 | ifneq ($(dtstree),) | |
1218 | ||
1219 | %.dtb: prepare3 scripts_dtc | |
1220 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1221 | ||
4f0e3a57 RH |
1222 | PHONY += dtbs dtbs_install dt_binding_check |
1223 | dtbs dtbs_check: prepare3 scripts_dtc | |
37c8a5fa RH |
1224 | $(Q)$(MAKE) $(build)=$(dtstree) |
1225 | ||
4f0e3a57 RH |
1226 | dtbs_check: export CHECK_DTBS=1 |
1227 | dtbs_check: dt_binding_check | |
1228 | ||
37c8a5fa RH |
1229 | dtbs_install: |
1230 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1231 | ||
1232 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1233 | all: dtbs | |
1234 | endif | |
1235 | ||
1236 | endif | |
1237 | ||
1238 | PHONY += scripts_dtc | |
1239 | scripts_dtc: scripts_basic | |
1240 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1241 | ||
4f0e3a57 RH |
1242 | dt_binding_check: scripts_dtc |
1243 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1244 | ||
1da177e4 LT |
1245 | # --------------------------------------------------------------------------- |
1246 | # Modules | |
1247 | ||
1248 | ifdef CONFIG_MODULES | |
1249 | ||
070b98bf | 1250 | # By default, build modules as well |
1da177e4 | 1251 | |
73d1393e | 1252 | all: modules |
1da177e4 | 1253 | |
3fbb43df | 1254 | # Build modules |
551559e1 | 1255 | # |
3fbb43df MY |
1256 | # A module can be listed more than once in obj-m resulting in |
1257 | # duplicate lines in modules.order files. Those are removed | |
1258 | # using awk while concatenating to the final file. | |
1da177e4 | 1259 | |
4f193362 | 1260 | PHONY += modules |
2da30e70 | 1261 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1262 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1263 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1264 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1265 | |
a6c36632 MM |
1266 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1267 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1268 | ||
2063945f | 1269 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
a6c36632 MM |
1270 | $(Q)$(MAKE) $(modbuiltin)=$* |
1271 | ||
1da177e4 LT |
1272 | |
1273 | # Target to prepare building external modules | |
4f193362 | 1274 | PHONY += modules_prepare |
059bc9fc | 1275 | modules_prepare: prepare |
1da177e4 LT |
1276 | |
1277 | # Target to install modules | |
4f193362 | 1278 | PHONY += modules_install |
1da177e4 LT |
1279 | modules_install: _modinst_ _modinst_post |
1280 | ||
4f193362 | 1281 | PHONY += _modinst_ |
2da30e70 | 1282 | _modinst_: |
1da177e4 LT |
1283 | @rm -rf $(MODLIB)/kernel |
1284 | @rm -f $(MODLIB)/source | |
1285 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1286 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1287 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1288 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1289 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1290 | fi |
551559e1 | 1291 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1292 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1293 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1294 | |
50a8ec31 | 1295 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1296 | # boot a modules.dep even before / is mounted read-write. However the |
1297 | # boot script depmod is the master version. | |
4f193362 | 1298 | PHONY += _modinst_post |
6d128e1e | 1299 | _modinst_post: _modinst_ |
50a8ec31 | 1300 | $(call cmd,depmod) |
1da177e4 | 1301 | |
d890f510 JB |
1302 | ifeq ($(CONFIG_MODULE_SIG), y) |
1303 | PHONY += modules_sign | |
1304 | modules_sign: | |
1305 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1306 | endif | |
1307 | ||
1da177e4 LT |
1308 | else # CONFIG_MODULES |
1309 | ||
1310 | # Modules not configured | |
1311 | # --------------------------------------------------------------------------- | |
1312 | ||
612e47ce MY |
1313 | PHONY += modules modules_install |
1314 | modules modules_install: | |
5369f550 MM |
1315 | @echo >&2 |
1316 | @echo >&2 "The present kernel configuration has modules disabled." | |
1317 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1318 | @echo >&2 "Then build a kernel with module support enabled." | |
1319 | @echo >&2 | |
1da177e4 LT |
1320 | @exit 1 |
1321 | ||
1322 | endif # CONFIG_MODULES | |
1323 | ||
1da177e4 LT |
1324 | ### |
1325 | # Cleaning is done on three levels. | |
1326 | # make clean Delete most generated files | |
1327 | # Leave enough to build external modules | |
1328 | # make mrproper Delete the current configuration, and all generated files | |
1329 | # make distclean Remove editor backup files, patch leftover files and the like | |
1330 | ||
1331 | # Directories & files removed with 'make clean' | |
fbfa9be9 | 1332 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
1da177e4 LT |
1333 | |
1334 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1335 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1336 | arch/*/include/generated .tmp_objdiff |
278ae604 | 1337 | MRPROPER_FILES += .config .config.old .version \ |
d5b71936 | 1338 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
fb117949 DW |
1339 | signing_key.pem signing_key.priv signing_key.x509 \ |
1340 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1341 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1342 | |
1343 | # clean - Delete most, but leave enough to build external modules | |
1344 | # | |
1345 | clean: rm-dirs := $(CLEAN_DIRS) | |
1346 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1347 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1348 | |
bd1ee804 | 1349 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1350 | $(clean-dirs): |
1351 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1352 | ||
bd1ee804 PM |
1353 | vmlinuxclean: |
1354 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1355 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1356 | |
1357 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1358 | |
1359 | # mrproper - Delete all generated files, including .config | |
1360 | # | |
1361 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1362 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1363 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1364 | |
b421b8a6 | 1365 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1366 | $(mrproper-dirs): |
1367 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1368 | ||
b421b8a6 | 1369 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1370 | $(call cmd,rmdirs) |
1371 | $(call cmd,rmfiles) | |
1372 | ||
1373 | # distclean | |
1374 | # | |
4f193362 | 1375 | PHONY += distclean |
1da177e4 LT |
1376 | |
1377 | distclean: mrproper | |
1378 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1379 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1380 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1381 | -o -name 'core' \) \ | |
1da177e4 LT |
1382 | -type f -print | xargs rm -f |
1383 | ||
1384 | ||
1385 | # Packaging of the kernel to various formats | |
1386 | # --------------------------------------------------------------------------- | |
c79624c1 | 1387 | package-dir := scripts/package |
1da177e4 | 1388 | |
bafb6747 ACM |
1389 | %src-pkg: FORCE |
1390 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1391 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1392 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1393 | |
1394 | ||
1395 | # Brief documentation of the typical targets used | |
1396 | # --------------------------------------------------------------------------- | |
1397 | ||
5dffbe81 | 1398 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1399 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1400 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1401 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1402 | |
fe69b420 | 1403 | PHONY += help |
1da177e4 LT |
1404 | help: |
1405 | @echo 'Cleaning targets:' | |
5ea084ef | 1406 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1407 | @echo ' enough build support to build external modules' |
5ea084ef | 1408 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1409 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1410 | @echo '' |
1411 | @echo 'Configuration targets:' | |
1412 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1413 | @echo '' | |
1414 | @echo 'Other generic targets:' | |
1415 | @echo ' all - Build all targets marked with [*]' | |
1416 | @echo '* vmlinux - Build the bare kernel' | |
1417 | @echo '* modules - Build all modules' | |
9cc5d74c | 1418 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1419 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1420 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1421 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1422 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1423 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1424 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1425 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1426 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1427 | @echo ' tags/TAGS - Generate tags file for editors' |
1428 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1429 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1430 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1431 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1432 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1433 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1434 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1435 | echo '' |
31b8cc80 | 1436 | @echo 'Static analysers:' |
1da177e4 LT |
1437 | @echo ' checkstack - Generate a list of stack hogs' |
1438 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1439 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1440 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1441 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1442 | @echo ' headers_check - Sanity check on exported headers' |
74425eee | 1443 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1444 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1445 | @echo '' |
31b8cc80 | 1446 | @echo 'Kernel selftest:' |
5a5da78b SK |
1447 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1448 | @echo ' Build, install, and boot kernel before' | |
1449 | @echo ' running kselftest on it' | |
dcb825a9 | 1450 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1451 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1452 | @echo ' .config.' |
5a5da78b | 1453 | @echo '' |
37c8a5fa RH |
1454 | @$(if $(dtstree), \ |
1455 | echo 'Devicetree:'; \ | |
1456 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1457 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1458 | echo '') | |
1459 | ||
31b8cc80 RD |
1460 | @echo 'Userspace tools targets:' |
1461 | @echo ' use "make tools/help"' | |
1462 | @echo ' or "cd tools; make help"' | |
1463 | @echo '' | |
1da177e4 | 1464 | @echo 'Kernel packaging:' |
6c2133e1 | 1465 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1466 | @echo '' |
1467 | @echo 'Documentation targets:' | |
cb43fb57 | 1468 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1469 | @echo '' |
01dee188 | 1470 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1471 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1472 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1473 | @echo '' |
1474 | @$(if $(boards), \ | |
1475 | $(foreach b, $(boards), \ | |
1476 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1477 | echo '') | |
5dffbe81 SB |
1478 | @$(if $(board-dirs), \ |
1479 | $(foreach b, $(board-dirs), \ | |
1480 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1481 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1482 | echo '') | |
1da177e4 LT |
1483 | |
1484 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1485 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1486 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1487 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1488 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1489 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1490 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1491 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1492 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1493 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1494 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1495 | @echo '' |
1496 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1497 | @echo 'For further info see the ./README file' | |
1498 | ||
1499 | ||
5dffbe81 SB |
1500 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1501 | ||
1502 | help-boards: $(help-board-dirs) | |
1503 | ||
fbae4d58 | 1504 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1505 | |
1506 | $(help-board-dirs): help-%: | |
1507 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1508 | @$(if $(boards-per-dir), \ | |
1509 | $(foreach b, $(boards-per-dir), \ | |
1510 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1511 | echo '') | |
1512 | ||
1513 | ||
1da177e4 LT |
1514 | # Documentation targets |
1515 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1516 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1517 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1518 | PHONY += $(DOC_TARGETS) |
1519 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1520 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 LT |
1521 | |
1522 | else # KBUILD_EXTMOD | |
1523 | ||
1524 | ### | |
1525 | # External module support. | |
1526 | # When building external modules the kernel used as basis is considered | |
1527 | # read-only, and no consistency checks are made and the make | |
1528 | # system is not used on the basis kernel. If updates are required | |
1529 | # in the basis kernel ordinary make commands (without M=...) must | |
1530 | # be used. | |
1531 | # | |
1532 | # The following are the only valid targets when building external | |
1533 | # modules. | |
1534 | # make M=dir clean Delete all automatically generated files | |
1535 | # make M=dir modules Make all modules in specified dir | |
1536 | # make M=dir Same as 'make M=dir modules' | |
1537 | # make M=dir modules_install | |
070b98bf | 1538 | # Install the modules built in the module directory |
1da177e4 LT |
1539 | # Assumes install directory is already created |
1540 | ||
1541 | # We are always building modules | |
1542 | KBUILD_MODULES := 1 | |
1da177e4 | 1543 | |
4f193362 | 1544 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1545 | $(objtree)/Module.symvers: |
1546 | @test -e $(objtree)/Module.symvers || ( \ | |
1547 | echo; \ | |
1548 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1549 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1550 | echo ) | |
1551 | ||
1552 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1553 | PHONY += $(module-dirs) modules |
e07db28e | 1554 | $(module-dirs): prepare $(objtree)/Module.symvers |
1da177e4 LT |
1555 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
1556 | ||
1557 | modules: $(module-dirs) | |
fd54f502 | 1558 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1559 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1560 | |
4f193362 | 1561 | PHONY += modules_install |
a67dc21a | 1562 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1563 | |
4f193362 PS |
1564 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1565 | PHONY += _emodinst_ | |
a67dc21a | 1566 | _emodinst_: |
a67dc21a | 1567 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1568 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1569 | |
4f193362 | 1570 | PHONY += _emodinst_post |
a67dc21a SR |
1571 | _emodinst_post: _emodinst_ |
1572 | $(call cmd,depmod) | |
1573 | ||
1da177e4 LT |
1574 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1575 | ||
4f193362 | 1576 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1577 | $(clean-dirs): |
1578 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1579 | ||
1580 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1581 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1582 | |
fe69b420 | 1583 | PHONY += help |
1da177e4 LT |
1584 | help: |
1585 | @echo ' Building external modules.' | |
1586 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1587 | @echo '' | |
1588 | @echo ' modules - default target, build the module(s)' | |
1589 | @echo ' modules_install - install the module' | |
1590 | @echo ' clean - remove generated files in module directory only' | |
1591 | @echo '' | |
06300b21 | 1592 | |
059bc9fc | 1593 | PHONY += prepare |
e07db28e MY |
1594 | prepare: |
1595 | $(cmd_crmodverdir) | |
1da177e4 LT |
1596 | endif # KBUILD_EXTMOD |
1597 | ||
88d7be03 MM |
1598 | clean: $(clean-dirs) |
1599 | $(call cmd,rmdirs) | |
1600 | $(call cmd,rmfiles) | |
43f67c98 | 1601 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1602 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1603 | -o -name '*.ko.*' \ |
1604 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1605 | -o -name '*.dwo' -o -name '*.lst' \ |
d523b255 | 1606 | -o -name '*.su' \ |
88d7be03 | 1607 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1608 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1609 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1610 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1611 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1612 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1613 | -o -name '*.ll' \ |
88d7be03 MM |
1614 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1615 | ||
1da177e4 LT |
1616 | # Generate tags for editors |
1617 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1618 | quiet_cmd_tags = GEN $@ |
1619 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1620 | |
f4ed1009 | 1621 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1622 | $(call cmd,tags) |
1623 | ||
1da177e4 LT |
1624 | # Scripts to check various things for consistency |
1625 | # --------------------------------------------------------------------------- | |
1626 | ||
279f3dd3 PF |
1627 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1628 | ||
1da177e4 | 1629 | includecheck: |
436f876c | 1630 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1631 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1632 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1633 | |
1634 | versioncheck: | |
2ee2d292 | 1635 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1636 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1637 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1638 | |
74425eee NP |
1639 | coccicheck: |
1640 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1641 | ||
1da177e4 LT |
1642 | namespacecheck: |
1643 | $(PERL) $(srctree)/scripts/namespace.pl | |
1644 | ||
295ac051 AB |
1645 | export_report: |
1646 | $(PERL) $(srctree)/scripts/export_report.pl | |
1647 | ||
c398ff00 | 1648 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1649 | |
011e3a9a JD |
1650 | # UML needs a little special treatment here. It wants to use the host |
1651 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1652 | # else wants $(ARCH), including people doing cross-builds, which means | |
1653 | # that $(SUBARCH) doesn't work here. | |
1654 | ifeq ($(ARCH), um) | |
1655 | CHECKSTACK_ARCH := $(SUBARCH) | |
1656 | else | |
1657 | CHECKSTACK_ARCH := $(ARCH) | |
1658 | endif | |
1da177e4 LT |
1659 | checkstack: |
1660 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1661 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1662 | |
7b8ea53d AW |
1663 | kernelrelease: |
1664 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1665 | |
cb58455c | 1666 | kernelversion: |
2244cbd8 | 1667 | @echo $(KERNELVERSION) |
1da177e4 | 1668 | |
c398ff00 MM |
1669 | image_name: |
1670 | @echo $(KBUILD_IMAGE) | |
1671 | ||
ea01fa9f BP |
1672 | # Clear a bunch of variables before executing the submake |
1673 | tools/: FORCE | |
bf35182f | 1674 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1675 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1676 | |
1677 | tools/%: FORCE | |
bf35182f | 1678 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1679 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1680 | |
06300b21 SR |
1681 | # Single targets |
1682 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1683 | # Single targets are compatible with: |
e1b8513d | 1684 | # - build with mixed source and output |
bc2546a6 SR |
1685 | # - build with separate output dir 'make O=...' |
1686 | # - external modules | |
1687 | # | |
1688 | # target-dir => where to store outputfile | |
1689 | # build-dir => directory in kernel source tree to use | |
1690 | ||
1691 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1692 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1693 | target-dir = $(dir $@) |
1694 | else | |
1695 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1696 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1697 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1698 | endif | |
1699 | ||
059bc9fc | 1700 | %.s: %.c prepare FORCE |
bc2546a6 | 1701 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1702 | %.i: %.c prepare FORCE |
bc2546a6 | 1703 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1704 | %.o: %.c prepare FORCE |
bc2546a6 | 1705 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1706 | %.lst: %.c prepare FORCE |
bc2546a6 | 1707 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1708 | %.s: %.S prepare FORCE |
bc2546a6 | 1709 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1710 | %.o: %.S prepare FORCE |
bc2546a6 | 1711 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1712 | %.symtypes: %.c prepare FORCE |
15fde675 | 1713 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
059bc9fc | 1714 | %.ll: %.c prepare FORCE |
433db3e2 | 1715 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
06300b21 | 1716 | |
bc2546a6 | 1717 | # Modules |
059bc9fc | 1718 | /: prepare FORCE |
31110ebb SR |
1719 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1720 | $(build)=$(build-dir) | |
8e2faea8 | 1721 | # Make sure the latest headers are built for Documentation |
ddea05fa | 1722 | Documentation/ samples/: headers_install |
059bc9fc | 1723 | %/: prepare FORCE |
06300b21 | 1724 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1725 | $(build)=$(build-dir) |
059bc9fc | 1726 | %.ko: prepare FORCE |
06300b21 | 1727 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1728 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1729 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1730 | |
38385f8f | 1731 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1732 | # =========================================================================== |
1733 | ||
1734 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1735 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1736 | ||
1737 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1738 | cmd_rmfiles = rm -f $(rm-files) | |
1739 | ||
bc3c26fe | 1740 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1741 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1742 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1743 | $(KERNELRELEASE) |
50a8ec31 | 1744 | |
7bb9d092 | 1745 | # Create temporary dir for module support files |
ab19f879 SR |
1746 | # clean it up only when building all modules |
1747 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1748 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1da177e4 | 1749 | |
392885ee MY |
1750 | # read saved command lines for existing targets |
1751 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1752 | |
392885ee MY |
1753 | cmd_files := $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1754 | $(cmd_files): ; # Do not try to update included dependency files | |
1755 | -include $(cmd_files) | |
1da177e4 | 1756 | |
25815cf5 MY |
1757 | endif # ifeq ($(config-targets),1) |
1758 | endif # ifeq ($(mixed-targets),1) | |
1da177e4 LT |
1759 | endif # skip-makefile |
1760 | ||
4f193362 | 1761 | PHONY += FORCE |
1da177e4 | 1762 | FORCE: |
4f193362 | 1763 | |
bd412d81 | 1764 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1765 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1766 | .PHONY: $(PHONY) |