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55922c9d 1VERSION = 3
a49f0d1e 2PATCHLEVEL = 8
55922c9d 3SUBLEVEL = 0
d1c3ed66 4EXTRAVERSION = -rc2
979570e0 5NAME = Terrified Chipmunk
1da177e4
LT
6
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
15964864
OV
13# Do not:
14# o use make's built-in rules and variables
d384e35a 15# (this increases performance and avoids hard-to-debug behaviour);
15964864
OV
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
1da177e4 18
c051346b 19# Avoid funny character set dependencies
06b5dc64 20unexport LC_ALL
c051346b
PA
21LC_COLLATE=C
22LC_NUMERIC=C
07105202 23export LC_COLLATE LC_NUMERIC
c051346b 24
1da177e4
LT
25# We are using a recursive build, so we need to do a little thinking
26# to get the ordering right.
27#
28# Most importantly: sub-Makefiles should only ever modify files in
29# their own directory. If in some directory we have a dependency on
30# a file in another dir (which doesn't happen often, but it's often
31# unavoidable when linking the built-in.o targets which finally
32# turn into vmlinux), we will call a sub make in that other dir, and
33# after that we are sure that everything which is in that other dir
34# is now up to date.
35#
36# The only cases where we need to modify files which have global
37# effects are thus separated out and done before the recursive
38# descending is started. They are now explicitly listed as the
39# prepare rule.
40
41# To put more focus on warnings, be less verbose as default
42# Use 'make V=1' to see the full commands
43
b8b0618c
CR
44ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
1da177e4
LT
46endif
47ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49endif
50
1c7bafe7
RD
51# Call a source code checker (by default, "sparse") as part of the
52# C compilation.
53#
54# Use 'make C=1' to enable checking of only re-compiled files.
55# Use 'make C=2' to enable checking of *all* source files, regardless
56# of whether they are re-compiled or not.
57#
58# See the file "Documentation/sparse.txt" for more details, including
59# where to get the "sparse" utility.
1da177e4 60
b8b0618c
CR
61ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
1da177e4
LT
63endif
64ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66endif
67
68# Use make M=dir to specify directory of external module to build
69# Old syntax make ... SUBDIRS=$PWD is still supported
70# Setting the environment variable KBUILD_EXTMOD take precedence
71ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73endif
1da177e4 74
b8b0618c
CR
75ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77endif
1da177e4
LT
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
070b98bf 84#
1da177e4
LT
85# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
b8b0618c
CR
101ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
1da177e4
LT
103endif
104
4a5838ad 105ifeq ("$(origin W)", "command line")
28bc20dc 106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
4a5838ad
BP
107endif
108
1da177e4 109# That's our default target when none is given on the command line
4f193362 110PHONY := _all
1da177e4
LT
111_all:
112
1cacc9ab
SR
113# Cancel implicit rules on top Makefile
114$(CURDIR)/Makefile Makefile: ;
115
1da177e4
LT
116ifneq ($(KBUILD_OUTPUT),)
117# Invoke a second make in the output directory, passing relevant variables
118# check that the output directory actually exists
119saved-output := $(KBUILD_OUTPUT)
120KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
121$(if $(KBUILD_OUTPUT),, \
122 $(error output directory "$(saved-output)" does not exist))
1da177e4 123
0b35786d
MM
124PHONY += $(MAKECMDGOALS) sub-make
125
1cacc9ab 126$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
16f89098 127 @:
0b35786d
MM
128
129sub-make: FORCE
23a45e2c
SR
130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
0b35786d
MM
132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
134
135# Leave processing to above invocation of make
136skip-makefile := 1
137endif # ifneq ($(KBUILD_OUTPUT),)
138endif # ifeq ($(KBUILD_SRC),)
139
140# We process the rest of the Makefile if this is the final invocation of make
141ifeq ($(skip-makefile),)
142
143# If building an external module we do not care about the all: rule
144# but instead _all depend on modules
4f193362 145PHONY += all
1da177e4
LT
146ifeq ($(KBUILD_EXTMOD),)
147_all: all
148else
149_all: modules
150endif
151
152srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
1da177e4
LT
153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
0f558c33 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 158
11294235 159export srctree objtree VPATH
1da177e4 160
1da177e4
LT
161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
3cc000b5 172 -e s/sh[234].*/sh/ )
1da177e4
LT
173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
84336466
RM
190# A third alternative is to store a setting in .config so that plain
191# "make" in the configured kernel build directory always uses that.
1da177e4
LT
192# Default value for CROSS_COMPILE is not to prefix executables
193# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
4ce6efed 194export KBUILD_BUILDHOST := $(SUBARCH)
2331d1a6 195ARCH ?= $(SUBARCH)
84336466 196CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
1da177e4
LT
197
198# Architecture as present in compile.h
6752ed90
TG
199UTS_MACHINE := $(ARCH)
200SRCARCH := $(ARCH)
1da177e4 201
d746d647
SR
202# Additional ARCH settings for x86
203ifeq ($(ARCH),i386)
204 SRCARCH := x86
205endif
206ifeq ($(ARCH),x86_64)
207 SRCARCH := x86
208endif
74b469f2 209
5e538790 210# Additional ARCH settings for sparc
e69f58c0
NK
211ifeq ($(ARCH),sparc32)
212 SRCARCH := sparc
213endif
a439fe51 214ifeq ($(ARCH),sparc64)
5e538790 215 SRCARCH := sparc
a439fe51 216endif
2fb9b1bd 217
3cc000b5
PM
218# Additional ARCH settings for sh
219ifeq ($(ARCH),sh64)
220 SRCARCH := sh
221endif
222
18aecc2b 223# Additional ARCH settings for tile
6738d321
CM
224ifeq ($(ARCH),tilepro)
225 SRCARCH := tile
226endif
18aecc2b
CM
227ifeq ($(ARCH),tilegx)
228 SRCARCH := tile
229endif
230
5e538790
SR
231# Where to locate arch specific headers
232hdr-arch := $(SRCARCH)
233
14cdd3c4 234KCONFIG_CONFIG ?= .config
41263fc6 235export KCONFIG_CONFIG
14cdd3c4 236
1da177e4
LT
237# SHELL used by kbuild
238CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
239 else if [ -x /bin/bash ]; then echo /bin/bash; \
240 else echo sh; fi ; fi)
241
070b98bf
SR
242HOSTCC = gcc
243HOSTCXX = g++
25583d4b 244HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
070b98bf 245HOSTCXXFLAGS = -O2
1da177e4 246
070b98bf
SR
247# Decide whether to build built-in, modular, or both.
248# Normally, just do built-in.
1da177e4
LT
249
250KBUILD_MODULES :=
251KBUILD_BUILTIN := 1
252
253# If we have only "make modules", don't compile built-in objects.
254# When we're building modules with modversions, we need to consider
255# the built-in objects during the descend as well, in order to
070b98bf 256# make sure the checksums are up to date before we record them.
1da177e4
LT
257
258ifeq ($(MAKECMDGOALS),modules)
259 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
260endif
261
262# If we have "make <whatever> modules", compile modules
263# in addition to whatever we do anyway.
264# Just "make" or "make all" shall build modules as well
265
266ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
267 KBUILD_MODULES := 1
268endif
269
270ifeq ($(MAKECMDGOALS),)
271 KBUILD_MODULES := 1
272endif
273
e579d351 274export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
275export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
276
277# Beautify output
278# ---------------------------------------------------------------------------
279#
280# Normally, we echo the whole command before executing it. By making
281# that echo $($(quiet)$(cmd)), we now have the possibility to set
282# $(quiet) to choose other forms of output instead, e.g.
283#
284# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
285# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
286#
287# If $(quiet) is empty, the whole command will be printed.
288# If it is set to "quiet_", only the short version will be printed.
070b98bf 289# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
290# the variable $(silent_cmd_cc_o_c) doesn't exist.
291#
a58a414f 292# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
LT
293# for commands that shall be hidden in non-verbose mode.
294#
295# $(Q)ln $@ :<
296#
297# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
298# If KBUILD_VERBOSE equals 1 then the above command is displayed.
299
300ifeq ($(KBUILD_VERBOSE),1)
301 quiet =
302 Q =
303else
304 quiet=quiet_
305 Q = @
306endif
307
308# If the user is running make -s (silent mode), suppress echoing of
309# commands
310
e6ac89fa 311ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
1da177e4
LT
312 quiet=silent_
313endif
314
315export quiet Q KBUILD_VERBOSE
316
1da177e4
LT
317
318# Look for make include files relative to root of kernel src
319MAKEFLAGS += --include-dir=$(srctree)
320
1cacc9ab
SR
321# We need some generic definitions (do not try to remake the file).
322$(srctree)/scripts/Kbuild.include: ;
15964864 323include $(srctree)/scripts/Kbuild.include
1da177e4
LT
324
325# Make variables (CC, etc...)
326
327AS = $(CROSS_COMPILE)as
328LD = $(CROSS_COMPILE)ld
329CC = $(CROSS_COMPILE)gcc
330CPP = $(CC) -E
331AR = $(CROSS_COMPILE)ar
332NM = $(CROSS_COMPILE)nm
333STRIP = $(CROSS_COMPILE)strip
334OBJCOPY = $(CROSS_COMPILE)objcopy
335OBJDUMP = $(CROSS_COMPILE)objdump
336AWK = awk
337GENKSYMS = scripts/genksyms/genksyms
caa27b66 338INSTALLKERNEL := installkernel
1da177e4 339DEPMOD = /sbin/depmod
1da177e4
LT
340PERL = perl
341CHECK = sparse
342
80a7d1d9
HE
343CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
344 -Wbitwise -Wno-return-void $(CF)
6588169d
SR
345CFLAGS_MODULE =
346AFLAGS_MODULE =
347LDFLAGS_MODULE =
1da177e4
LT
348CFLAGS_KERNEL =
349AFLAGS_KERNEL =
2521f2c2 350CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
351
352
abbf1590
DH
353# Use USERINCLUDE when you must reference the UAPI directories only.
354USERINCLUDE := \
355 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
356 -Iarch/$(hdr-arch)/include/generated/uapi \
357 -I$(srctree)/include/uapi \
358 -Iinclude/generated/uapi \
359 -include $(srctree)/include/linux/kconfig.h
360
1da177e4
LT
361# Use LINUXINCLUDE when you must reference the include/ directory.
362# Needed to be compatible with the O= option
abbf1590
DH
363LINUXINCLUDE := \
364 -I$(srctree)/arch/$(hdr-arch)/include \
365 -Iarch/$(hdr-arch)/include/generated \
366 $(if $(KBUILD_SRC), -I$(srctree)/include) \
367 -Iinclude \
368 $(USERINCLUDE)
1da177e4 369
d8672b40 370KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 371
a0f97e06 372KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 373 -fno-strict-aliasing -fno-common \
a8735821 374 -Werror-implicit-function-declaration \
a3ca86ae
ET
375 -Wno-format-security \
376 -fno-delete-null-pointer-checks
80c00ba9
SR
377KBUILD_AFLAGS_KERNEL :=
378KBUILD_CFLAGS_KERNEL :=
222d394d 379KBUILD_AFLAGS := -D__ASSEMBLY__
6588169d
SR
380KBUILD_AFLAGS_MODULE := -DMODULE
381KBUILD_CFLAGS_MODULE := -DMODULE
382KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 383
f1d28fb0
RZ
384# Read KERNELRELEASE from include/config/kernel.release (if it exists)
385KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 386KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 387
070b98bf 388export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 389export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66
SR
390export CPP AR NM STRIP OBJCOPY OBJDUMP
391export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
070b98bf 392export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 393
06c5040c 394export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 395export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 396export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 397export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 398export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 399export KBUILD_ARFLAGS
1da177e4
LT
400
401# When compiling out-of-tree modules, put MODVERDIR in the module
402# tree rather than in the kernel tree. The kernel tree might
403# even be read-only.
404export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
405
1da177e4
LT
406# Files to ignore in find ... statements
407
450c6076
JJ
408RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
409 -o -name .pc -o -name .hg -o -name .git \) -prune -o
410export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
411 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
412
413# ===========================================================================
414# Rules shared between *config targets and build targets
415
416# Basic helpers built in scripts/
4f193362 417PHONY += scripts_basic
1da177e4
LT
418scripts_basic:
419 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 420 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 421
cd05e6bd
JB
422# To avoid any implicit rule to kick in, define an empty command.
423scripts/basic/%: scripts_basic ;
424
4f193362 425PHONY += outputmakefile
fd5f0cd6
JB
426# outputmakefile generates a Makefile in the output directory, if using a
427# separate output directory. This allows convenient use of make in the
428# output directory.
1da177e4 429outputmakefile:
fd5f0cd6 430ifneq ($(KBUILD_SRC),)
92979997 431 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
432 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
433 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
434endif
1da177e4 435
d8ecc5cd
SR
436# Support for using generic headers in asm-generic
437PHONY += asm-generic
438asm-generic:
439 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8
CM
440 src=asm obj=arch/$(SRCARCH)/include/generated/asm
441 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
442 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 443
1da177e4
LT
444# To make sure we do not include .config for any of the *config targets
445# catch them early, and hand them over to scripts/kconfig/Makefile
446# It is allowed to specify more targets when calling make, including
447# mixing *config targets and build targets.
070b98bf 448# For example 'make oldconfig all'.
1da177e4
LT
449# Detect when mixed targets is specified, and make a second invocation
450# of make so .config is not included in this case either (for *config).
451
10b63956 452version_h := include/generated/uapi/linux/version.h
d183e6f5 453
3eb3c740 454no-dot-config-targets := clean mrproper distclean \
f4ed1009 455 cscope gtags TAGS tags help %docs check% coccicheck \
d183e6f5 456 $(version_h) headers_% archheaders archscripts \
4aed2fd8 457 kernelversion %src-pkg
1da177e4
LT
458
459config-targets := 0
460mixed-targets := 0
461dot-config := 1
462
463ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
464 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
465 dot-config := 0
466 endif
467endif
468
469ifeq ($(KBUILD_EXTMOD),)
470 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
471 config-targets := 1
472 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
473 mixed-targets := 1
474 endif
475 endif
476endif
477
478ifeq ($(mixed-targets),1)
479# ===========================================================================
480# We're called with mixed targets (*config and build targets).
481# Handle them one by one.
482
483%:: FORCE
484 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
485
486else
487ifeq ($(config-targets),1)
488# ===========================================================================
489# *config targets only - make sure prerequisites are updated, and descend
490# in scripts/kconfig to make the *config target
491
492# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
493# KBUILD_DEFCONFIG may point out an alternative default configuration
494# used for 'make defconfig'
74b469f2 495include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 496export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 497
31110ebb
SR
498config: scripts_basic outputmakefile FORCE
499 $(Q)mkdir -p include/linux include/config
500 $(Q)$(MAKE) $(build)=scripts/kconfig $@
501
502%config: scripts_basic outputmakefile FORCE
c955ccaf 503 $(Q)mkdir -p include/linux include/config
1da177e4
LT
504 $(Q)$(MAKE) $(build)=scripts/kconfig $@
505
506else
507# ===========================================================================
508# Build targets only - this includes vmlinux, arch specific targets, clean
509# targets and others. In general all targets except *config targets.
510
511ifeq ($(KBUILD_EXTMOD),)
512# Additional helpers built in scripts/
513# Carefully list dependencies so we do not try to build scripts twice
070b98bf 514# in parallel
4f193362 515PHONY += scripts
bc081dd6 516scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
1da177e4
LT
517 $(Q)$(MAKE) $(build)=$(@)
518
1da177e4
LT
519# Objects we will link into vmlinux / subdirs we need to visit
520init-y := init/
4d2acfbf 521drivers-y := drivers/ sound/ firmware/
1da177e4
LT
522net-y := net/
523libs-y := lib/
524core-y := usr/
525endif # KBUILD_EXTMOD
526
527ifeq ($(dot-config),1)
9ee4e336
SR
528# Read in config
529-include include/config/auto.conf
1da177e4 530
9ee4e336 531ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
532# Read in dependencies to all Kconfig* files, make sure to run
533# oldconfig if changes are detected.
c955ccaf 534-include include/config/auto.conf.cmd
1da177e4 535
1da177e4 536# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 537$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 538
c955ccaf 539# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 540# with it and forgot to run make oldconfig.
070b98bf 541# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 542# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 543include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 544 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 545else
264a2683 546# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
547# but do not care if they are up-to-date. Use auto.conf to trigger the test
548PHONY += include/config/auto.conf
549
550include/config/auto.conf:
264a2683 551 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
552 echo >&2; \
553 echo >&2 " ERROR: Kernel configuration is invalid."; \
554 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
555 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
556 echo >&2 ; \
9ee4e336
SR
557 /bin/false)
558
559endif # KBUILD_EXTMOD
c955ccaf 560
1da177e4
LT
561else
562# Dummy target needed, because used as prerequisite
c955ccaf 563include/config/auto.conf: ;
9ee4e336 564endif # $(dot-config)
1da177e4
LT
565
566# The all: target is the default when no target is given on the
567# command line.
568# This allow a user to issue only 'make' to build a kernel including modules
c8447161 569# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
570all: vmlinux
571
572ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
a0f97e06 573KBUILD_CFLAGS += -Os
1da177e4 574else
a0f97e06 575KBUILD_CFLAGS += -O2
1da177e4
LT
576endif
577
a1f42beb
PM
578include $(srctree)/arch/$(SRCARCH)/Makefile
579
1873e870
AK
580ifdef CONFIG_READABLE_ASM
581# Disable optimizations that make assembler listings hard to read.
582# reorder blocks reorders the control in the function
583# ipa clone creates specialized cloned functions
584# partial inlining inlines only parts of functions
585KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
586 $(call cc-option,-fno-ipa-cp-clone,) \
587 $(call cc-option,-fno-partial-inlining)
588endif
589
08f67461 590ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
591KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
592endif
593
e06b8b98 594# Force gcc to behave correct even for buggy distributions
5d707e9c 595ifndef CONFIG_CC_STACKPROTECTOR
e06b8b98 596KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
5d707e9c 597endif
e06b8b98 598
af0e5d56
DJ
599# This warning generated too much noise in a regular build.
600# Use make W=1 to enable this warning (see scripts/Makefile.build)
8417da6f 601KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
af0e5d56 602
1da177e4 603ifdef CONFIG_FRAME_POINTER
a0f97e06 604KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 605else
7e9501fd
RV
606# Some targets (ARM with Thumb2, for example), can't be built with frame
607# pointers. For those, we don't have FUNCTION_TRACER automatically
608# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
609# incompatible with -fomit-frame-pointer with current GCC, so we don't use
610# -fomit-frame-pointer with FUNCTION_TRACER.
611ifndef CONFIG_FUNCTION_TRACER
a0f97e06 612KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 613endif
7e9501fd 614endif
1da177e4
LT
615
616ifdef CONFIG_DEBUG_INFO
a0f97e06 617KBUILD_CFLAGS += -g
222d394d 618KBUILD_AFLAGS += -gdwarf-2
1da177e4
LT
619endif
620
d6f4ceb7
AK
621ifdef CONFIG_DEBUG_INFO_REDUCED
622KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
623endif
624
606576ce 625ifdef CONFIG_FUNCTION_TRACER
a2546fae
SR
626ifdef CONFIG_HAVE_FENTRY
627CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
628endif
629KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
630KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 631ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 632 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
633 BUILD_C_RECORDMCOUNT := y
634 export BUILD_C_RECORDMCOUNT
635 endif
636endif
16444a8a
ACM
637endif
638
91341d4b
SR
639# We trigger additional mismatches with less inlining
640ifdef CONFIG_DEBUG_SECTION_MISMATCH
641KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
642endif
643
e8e69931 644# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 645NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
646CHECKFLAGS += $(NOSTDINC_FLAGS)
647
1da177e4 648# warn about C99 declaration after statement
a0f97e06 649KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 650
070b98bf 651# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 652KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 653
fe8d0a41 654# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 655KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 656
8f7f5c9f
AK
657# conserve stack if available
658KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
659
40df759e
MM
660# use the deterministic mode of AR if available
661KBUILD_ARFLAGS := $(call ar-option,D)
662
bf5438fc
JB
663# check for 'asm goto'
664ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
665 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
666endif
667
06c5040c 668# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
70cfe026
669KBUILD_CPPFLAGS += $(KCPPFLAGS)
670KBUILD_AFLAGS += $(KAFLAGS)
671KBUILD_CFLAGS += $(KCFLAGS)
52bcc330 672
18991197
RM
673# Use --build-id when available.
674LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 675 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 676KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
677LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
678
5d7d18f5 679ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 680LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
681endif
682
1da177e4 683# Default kernel image to build when no specific target is given.
070b98bf 684# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
685# set in the environment
686# Also any assignments in arch/$(ARCH)/Makefile take precedence over
687# this default value
688export KBUILD_IMAGE ?= vmlinux
689
690#
691# INSTALL_PATH specifies where to place the updated kernel and system map
692# images. Default is /boot, but you can set it to other values
693export INSTALL_PATH ?= /boot
694
695#
696# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
697# relocations required by build roots. This is not defined in the
070b98bf 698# makefile but the argument can be passed to make if needed.
1da177e4
LT
699#
700
df9df036 701MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
702export MODLIB
703
ac031f26 704#
2ea03891
SR
705# INSTALL_MOD_STRIP, if defined, will cause modules to be
706# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
707# the default option --strip-debug will be used. Otherwise,
177b241d 708# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 709
ac031f26
TT
710ifdef INSTALL_MOD_STRIP
711ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 712mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 713else
2ea03891 714mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
715endif # INSTALL_MOD_STRIP=1
716else
2ea03891 717mod_strip_cmd = true
ac031f26
TT
718endif # INSTALL_MOD_STRIP
719export mod_strip_cmd
720
1da177e4 721
e2a666d5
RR
722ifeq ($(CONFIG_MODULE_SIG),y)
723MODSECKEY = ./signing_key.priv
724MODPUBKEY = ./signing_key.x509
725export MODPUBKEY
b37d1bfb 726mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY)
e2a666d5
RR
727else
728mod_sign_cmd = true
729endif
730export mod_sign_cmd
731
732
1da177e4 733ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 734core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
735
736vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
737 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
738 $(net-y) $(net-m) $(libs-y) $(libs-m)))
739
740vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
741 $(init-n) $(init-) \
742 $(core-n) $(core-) $(drivers-n) $(drivers-) \
743 $(net-n) $(net-) $(libs-n) $(libs-))))
744
745init-y := $(patsubst %/, %/built-in.o, $(init-y))
746core-y := $(patsubst %/, %/built-in.o, $(core-y))
747drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
748net-y := $(patsubst %/, %/built-in.o, $(net-y))
749libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
750libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
751libs-y := $(libs-y1) $(libs-y2)
752
1f2bfbd0 753# Externally visible symbols (used by link-vmlinux.sh)
95698570
SR
754export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
755export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
756export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 757export LDFLAGS_vmlinux
9bb48247 758
1f2bfbd0 759vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
1da177e4 760
1f2bfbd0
SR
761# Final link of vmlinux
762 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
763quiet_cmd_link-vmlinux = LINK $@
1da177e4 764
1f2bfbd0
SR
765# Include targets which we want to
766# execute if the rest of the kernel build went well.
767vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
0f836e5f 768ifdef CONFIG_HEADERS_CHECK
0e7af8d0 769 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
770endif
771ifdef CONFIG_SAMPLES
772 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
773endif
774ifdef CONFIG_BUILD_DOCSRC
775 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 776endif
1f2bfbd0 777 +$(call if_changed,link-vmlinux)
741f98fe 778
1da177e4
LT
779# The actual objects are generated when descending,
780# make sure no implicit rule kicks in
1f2bfbd0 781$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
782
783# Handle descending into subdirectories listed in $(vmlinux-dirs)
784# Preset locale variables to speed up the build process. Limit locale
785# tweaks to this spot to avoid wrong language settings when running
786# make menuconfig etc.
787# Error messages still appears in the original language
788
4f193362 789PHONY += $(vmlinux-dirs)
5bb78269 790$(vmlinux-dirs): prepare scripts
1da177e4
LT
791 $(Q)$(MAKE) $(build)=$@
792
f1d28fb0 793# Store (new) KERNELRELASE string in include/config/kernel.release
f1d28fb0 794include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8 795 $(Q)rm -f $@
7263e715 796 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
cb58455c
SR
797
798
1da177e4 799# Things we need to do before we recursively start building the kernel
5bb78269
SR
800# or the modules are listed in "prepare".
801# A multi level approach is used. prepareN is processed before prepareN-1.
802# archprepare is used in arch Makefiles and when processed asm symlink,
803# version.h and scripts_basic is processed / created.
1da177e4 804
5bb78269 805# Listed in dependency order
4f193362 806PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 807
86feeaa8 808# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
809# and if so do:
810# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 811prepare3: include/config/kernel.release
1da177e4 812ifneq ($(KBUILD_SRC),)
fd54f502 813 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 814 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
815 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
816 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
817 /bin/false; \
818 fi;
1da177e4
LT
819endif
820
86feeaa8 821# prepare2 creates a makefile if using a separate output directory
d8ecc5cd 822prepare2: prepare3 outputmakefile asm-generic
1da177e4 823
d183e6f5 824prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 825 include/config/auto.conf
7bb9d092 826 $(cmd_crmodverdir)
1da177e4 827
6520fe55 828archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269
SR
829
830prepare0: archprepare FORCE
8d36a623 831 $(Q)$(MAKE) $(build)=.
86feeaa8 832
1da177e4 833# All the preparing..
d395efb5 834prepare: prepare0
1da177e4 835
1da177e4
LT
836# Generate some files
837# ---------------------------------------------------------------------------
838
839# KERNELRELEASE can change from a few different places, meaning version.h
840# needs to be updated, so this check is forced on all builds
841
842uts_len := 64
63104eec
SR
843define filechk_utsrelease.h
844 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
845 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
846 exit 1; \
847 fi; \
848 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
849endef
1da177e4
LT
850
851define filechk_version.h
450c6076
JJ
852 (echo \#define LINUX_VERSION_CODE $(shell \
853 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 854 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
855endef
856
d183e6f5 857$(version_h): $(srctree)/Makefile FORCE
1da177e4
LT
858 $(call filechk,version.h)
859
273b281f 860include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
861 $(call filechk,utsrelease.h)
862
179efcb4
VN
863PHONY += headerdep
864headerdep:
9663d989
PF
865 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
866 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 867
1da177e4
LT
868# ---------------------------------------------------------------------------
869
4f193362 870PHONY += depend dep
1da177e4
LT
871depend dep:
872 @echo '*** Warning: make $@ is unnecessary now.'
873
88ecf814
DW
874# ---------------------------------------------------------------------------
875# Firmware install
876INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
877export INSTALL_FW_PATH
878
879PHONY += firmware_install
880firmware_install: FORCE
881 @mkdir -p $(objtree)/firmware
882 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
883
8d730cfb
DW
884# ---------------------------------------------------------------------------
885# Kernel headers
8d730cfb 886
e6883b18
SR
887#Default location for installed headers
888export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 889
e6883b18 890hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
891
892# If we do an all arch process set dst to asm-$(hdr-arch)
893hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18 894
052ad274
PA
895PHONY += archheaders
896archheaders:
897
6520fe55
PA
898PHONY += archscripts
899archscripts:
900
e6883b18 901PHONY += __headers
d183e6f5 902__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
e1b702cf 903 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
904
905PHONY += headers_install_all
2fb9b1bd
SR
906headers_install_all:
907 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 908
8d730cfb 909PHONY += headers_install
e6883b18 910headers_install: __headers
10b63956
DH
911 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
912 $(error Headers not exportable for the $(SRCARCH) architecture))
913 $(Q)$(MAKE) $(hdr-inst)=include/uapi
914 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
8d730cfb 915
1f85712e
MF
916PHONY += headers_check_all
917headers_check_all: headers_install_all
2fb9b1bd 918 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 919
68475359
DW
920PHONY += headers_check
921headers_check: headers_install
10b63956
DH
922 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
923 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
68475359 924
1da177e4
LT
925# ---------------------------------------------------------------------------
926# Modules
927
928ifdef CONFIG_MODULES
929
070b98bf 930# By default, build modules as well
1da177e4 931
73d1393e 932all: modules
1da177e4
LT
933
934# Build modules
551559e1
TH
935#
936# A module can be listed more than once in obj-m resulting in
937# duplicate lines in modules.order files. Those are removed
938# using awk while concatenating to the final file.
1da177e4 939
4f193362 940PHONY += modules
2da30e70 941modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 942 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 943 @$(kecho) ' Building modules, stage 2.';
b805aa0e 944 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 945 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 946
a6c36632
MM
947modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
948 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
949
73d1393e 950%/modules.builtin: include/config/auto.conf
a6c36632
MM
951 $(Q)$(MAKE) $(modbuiltin)=$*
952
1da177e4
LT
953
954# Target to prepare building external modules
4f193362 955PHONY += modules_prepare
5bb78269 956modules_prepare: prepare scripts
1da177e4
LT
957
958# Target to install modules
4f193362 959PHONY += modules_install
1da177e4
LT
960modules_install: _modinst_ _modinst_post
961
4f193362 962PHONY += _modinst_
2da30e70 963_modinst_:
1da177e4
LT
964 @rm -rf $(MODLIB)/kernel
965 @rm -f $(MODLIB)/source
966 @mkdir -p $(MODLIB)/kernel
967 @ln -s $(srctree) $(MODLIB)/source
968 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
969 rm -f $(MODLIB)/build ; \
970 ln -s $(objtree) $(MODLIB)/build ; \
971 fi
551559e1 972 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 973 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 974 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 975
50a8ec31 976# This depmod is only for convenience to give the initial
1da177e4
LT
977# boot a modules.dep even before / is mounted read-write. However the
978# boot script depmod is the master version.
4f193362 979PHONY += _modinst_post
1da177e4 980_modinst_post: _modinst_
88ecf814 981 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 982 $(call cmd,depmod)
1da177e4 983
d890f510
JB
984ifeq ($(CONFIG_MODULE_SIG), y)
985PHONY += modules_sign
986modules_sign:
987 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
988endif
989
1da177e4
LT
990else # CONFIG_MODULES
991
992# Modules not configured
993# ---------------------------------------------------------------------------
994
995modules modules_install: FORCE
5369f550
MM
996 @echo >&2
997 @echo >&2 "The present kernel configuration has modules disabled."
998 @echo >&2 "Type 'make config' and enable loadable module support."
999 @echo >&2 "Then build a kernel with module support enabled."
1000 @echo >&2
1da177e4
LT
1001 @exit 1
1002
1003endif # CONFIG_MODULES
1004
1da177e4
LT
1005###
1006# Cleaning is done on three levels.
1007# make clean Delete most generated files
1008# Leave enough to build external modules
1009# make mrproper Delete the current configuration, and all generated files
1010# make distclean Remove editor backup files, patch leftover files and the like
1011
1012# Directories & files removed with 'make clean'
1013CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1014
1015# Directories & files removed with 'make mrproper'
d8ecc5cd
SR
1016MRPROPER_DIRS += include/config usr/include include/generated \
1017 arch/*/include/generated
d183e6f5 1018MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
d5b71936
RR
1019 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1020 signing_key.priv signing_key.x509 x509.genkey \
1021 extra_certificates signing_key.x509.keyid \
1022 signing_key.x509.signer
1da177e4
LT
1023
1024# clean - Delete most, but leave enough to build external modules
1025#
1026clean: rm-dirs := $(CLEAN_DIRS)
1027clean: rm-files := $(CLEAN_FILES)
fb68d4be 1028clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1029
bd1ee804 1030PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1031$(clean-dirs):
1032 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1033
bd1ee804
PM
1034vmlinuxclean:
1035 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1036
1037clean: archclean vmlinuxclean
1da177e4
LT
1038
1039# mrproper - Delete all generated files, including .config
1040#
1041mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1042mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1043mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1044
4f193362 1045PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1046$(mrproper-dirs):
1047 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1048
1049mrproper: clean archmrproper $(mrproper-dirs)
1050 $(call cmd,rmdirs)
1051 $(call cmd,rmfiles)
1052
1053# distclean
1054#
4f193362 1055PHONY += distclean
1da177e4
LT
1056
1057distclean: mrproper
1058 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1059 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1060 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
f4b129f5 1061 -o -name '.*.rej' \
1da177e4
LT
1062 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1063 -type f -print | xargs rm -f
1064
1065
1066# Packaging of the kernel to various formats
1067# ---------------------------------------------------------------------------
1068# rpm target kept for backward compatibility
1069package-dir := $(srctree)/scripts/package
1070
bafb6747
ACM
1071%src-pkg: FORCE
1072 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1073%pkg: include/config/kernel.release FORCE
6c2133e1 1074 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1075rpm: include/config/kernel.release FORCE
6c2133e1 1076 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1077
1078
1079# Brief documentation of the typical targets used
1080# ---------------------------------------------------------------------------
1081
5dffbe81 1082boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1083boards := $(notdir $(boards))
5dffbe81
SB
1084board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1085board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1086
1087help:
1088 @echo 'Cleaning targets:'
5ea084ef 1089 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1090 @echo ' enough build support to build external modules'
5ea084ef 1091 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1092 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1093 @echo ''
1094 @echo 'Configuration targets:'
1095 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1096 @echo ''
1097 @echo 'Other generic targets:'
1098 @echo ' all - Build all targets marked with [*]'
1099 @echo '* vmlinux - Build the bare kernel'
1100 @echo '* modules - Build all modules'
9cc5d74c 1101 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1102 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1103 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1104 @echo ' dir/ - Build all files in dir and below'
62718979
JP
1105 @echo ' dir/file.[oisS] - Build specified target only'
1106 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1107 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1108 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1109 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1110 @echo ' tags/TAGS - Generate tags file for editors'
1111 @echo ' cscope - Generate cscope index'
f4ed1009 1112 @echo ' gtags - Generate GNU GLOBAL index'
6d128842 1113 @echo ' kernelrelease - Output the release version string'
cb58455c 1114 @echo ' kernelversion - Output the version stored in Makefile'
2fb9b1bd 1115 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1116 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1117 echo ''
1da177e4 1118 @echo 'Static analysers'
1da177e4
LT
1119 @echo ' checkstack - Generate a list of stack hogs'
1120 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1121 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1122 @echo ' includecheck - Check for duplicate included header files'
295ac051 1123 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1124 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1125 @echo ' headerdep - Detect inclusion cycles in headers'
1126 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1127 @echo ''
1da177e4 1128 @echo 'Kernel packaging:'
6c2133e1 1129 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1130 @echo ''
1131 @echo 'Documentation targets:'
1132 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1133 @echo ''
01dee188 1134 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1135 @$(if $(archhelp),$(archhelp),\
01dee188 1136 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1137 @echo ''
1138 @$(if $(boards), \
1139 $(foreach b, $(boards), \
1140 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1141 echo '')
5dffbe81
SB
1142 @$(if $(board-dirs), \
1143 $(foreach b, $(board-dirs), \
1144 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1145 printf " %-16s - Show all of the above\\n" help-boards; \
1146 echo '')
1da177e4
LT
1147
1148 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1149 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1150 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1151 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1152 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1153 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1154 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1155 @echo ' 1: warnings which may be relevant and do not occur too often'
1156 @echo ' 2: warnings which occur quite often but may still be relevant'
1157 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1158 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1159 @echo ''
1160 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1161 @echo 'For further info see the ./README file'
1162
1163
5dffbe81
SB
1164help-board-dirs := $(addprefix help-,$(board-dirs))
1165
1166help-boards: $(help-board-dirs)
1167
1168boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1169
1170$(help-board-dirs): help-%:
1171 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1172 @$(if $(boards-per-dir), \
1173 $(foreach b, $(boards-per-dir), \
1174 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1175 echo '')
1176
1177
1da177e4
LT
1178# Documentation targets
1179# ---------------------------------------------------------------------------
1180%docs: scripts_basic FORCE
bffd2020 1181 $(Q)$(MAKE) $(build)=scripts build_docproc
1da177e4
LT
1182 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1183
1184else # KBUILD_EXTMOD
1185
1186###
1187# External module support.
1188# When building external modules the kernel used as basis is considered
1189# read-only, and no consistency checks are made and the make
1190# system is not used on the basis kernel. If updates are required
1191# in the basis kernel ordinary make commands (without M=...) must
1192# be used.
1193#
1194# The following are the only valid targets when building external
1195# modules.
1196# make M=dir clean Delete all automatically generated files
1197# make M=dir modules Make all modules in specified dir
1198# make M=dir Same as 'make M=dir modules'
1199# make M=dir modules_install
070b98bf 1200# Install the modules built in the module directory
1da177e4
LT
1201# Assumes install directory is already created
1202
1203# We are always building modules
1204KBUILD_MODULES := 1
4f193362 1205PHONY += crmodverdir
1da177e4 1206crmodverdir:
7bb9d092 1207 $(cmd_crmodverdir)
1da177e4 1208
4f193362 1209PHONY += $(objtree)/Module.symvers
1da177e4
LT
1210$(objtree)/Module.symvers:
1211 @test -e $(objtree)/Module.symvers || ( \
1212 echo; \
1213 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1214 echo " is missing; modules will have no dependencies and modversions."; \
1215 echo )
1216
1217module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1218PHONY += $(module-dirs) modules
1da177e4
LT
1219$(module-dirs): crmodverdir $(objtree)/Module.symvers
1220 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1221
1222modules: $(module-dirs)
fd54f502 1223 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1224 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1225
4f193362 1226PHONY += modules_install
a67dc21a 1227modules_install: _emodinst_ _emodinst_post
e6304663 1228
4f193362
PS
1229install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1230PHONY += _emodinst_
a67dc21a 1231_emodinst_:
a67dc21a 1232 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1233 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1234
4f193362 1235PHONY += _emodinst_post
a67dc21a
SR
1236_emodinst_post: _emodinst_
1237 $(call cmd,depmod)
1238
1da177e4
LT
1239clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1240
4f193362 1241PHONY += $(clean-dirs) clean
1da177e4
LT
1242$(clean-dirs):
1243 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1244
1245clean: rm-dirs := $(MODVERDIR)
88d7be03 1246clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1247
1248help:
1249 @echo ' Building external modules.'
1250 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1251 @echo ''
1252 @echo ' modules - default target, build the module(s)'
1253 @echo ' modules_install - install the module'
1254 @echo ' clean - remove generated files in module directory only'
1255 @echo ''
06300b21
SR
1256
1257# Dummies...
4f193362 1258PHONY += prepare scripts
06300b21
SR
1259prepare: ;
1260scripts: ;
1da177e4
LT
1261endif # KBUILD_EXTMOD
1262
88d7be03
MM
1263clean: $(clean-dirs)
1264 $(call cmd,rmdirs)
1265 $(call cmd,rmfiles)
43f67c98 1266 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1267 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1268 -o -name '*.ko.*' \
88d7be03
MM
1269 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1270 -o -name '*.symtypes' -o -name 'modules.order' \
1271 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1272 -o -name '*.gcno' \) -type f -print | xargs rm -f
1273
1da177e4
LT
1274# Generate tags for editors
1275# ---------------------------------------------------------------------------
a680eedc
SR
1276quiet_cmd_tags = GEN $@
1277 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1278
f4ed1009 1279tags TAGS cscope gtags: FORCE
1da177e4
LT
1280 $(call cmd,tags)
1281
1da177e4
LT
1282# Scripts to check various things for consistency
1283# ---------------------------------------------------------------------------
1284
279f3dd3
PF
1285PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1286
1da177e4 1287includecheck:
436f876c 1288 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1289 -name '*.[hcS]' -type f -print | sort \
80007434 1290 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1291
1292versioncheck:
2ee2d292 1293 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1294 -name '*.[hcS]' -type f -print | sort \
80007434 1295 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1296
74425eee
NP
1297coccicheck:
1298 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1299
1da177e4
LT
1300namespacecheck:
1301 $(PERL) $(srctree)/scripts/namespace.pl
1302
295ac051
AB
1303export_report:
1304 $(PERL) $(srctree)/scripts/export_report.pl
1305
1da177e4
LT
1306endif #ifeq ($(config-targets),1)
1307endif #ifeq ($(mixed-targets),1)
1308
c30a02e0 1309PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1310
011e3a9a
JD
1311# UML needs a little special treatment here. It wants to use the host
1312# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1313# else wants $(ARCH), including people doing cross-builds, which means
1314# that $(SUBARCH) doesn't work here.
1315ifeq ($(ARCH), um)
1316CHECKSTACK_ARCH := $(SUBARCH)
1317else
1318CHECKSTACK_ARCH := $(ARCH)
1319endif
1da177e4
LT
1320checkstack:
1321 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1322 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1323
7b8ea53d
AW
1324kernelrelease:
1325 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1326
cb58455c 1327kernelversion:
2244cbd8 1328 @echo $(KERNELVERSION)
1da177e4 1329
ea01fa9f
BP
1330# Clear a bunch of variables before executing the submake
1331tools/: FORCE
bf35182f
DH
1332 $(Q)mkdir -p $(objtree)/tools
1333 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1334
1335tools/%: FORCE
bf35182f
DH
1336 $(Q)mkdir -p $(objtree)/tools
1337 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1338
06300b21
SR
1339# Single targets
1340# ---------------------------------------------------------------------------
bc2546a6 1341# Single targets are compatible with:
e1b8513d 1342# - build with mixed source and output
bc2546a6
SR
1343# - build with separate output dir 'make O=...'
1344# - external modules
1345#
1346# target-dir => where to store outputfile
1347# build-dir => directory in kernel source tree to use
1348
1349ifeq ($(KBUILD_EXTMOD),)
aa360879 1350 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1351 target-dir = $(dir $@)
1352else
1353 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1354 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1355 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1356endif
1357
f6ecebd6 1358%.s: %.c prepare scripts FORCE
bc2546a6 1359 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1360%.i: %.c prepare scripts FORCE
bc2546a6 1361 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1362%.o: %.c prepare scripts FORCE
bc2546a6 1363 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1364%.lst: %.c prepare scripts FORCE
bc2546a6 1365 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1366%.s: %.S prepare scripts FORCE
bc2546a6 1367 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1368%.o: %.S prepare scripts FORCE
bc2546a6 1369 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1370%.symtypes: %.c prepare scripts FORCE
1371 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1372
bc2546a6 1373# Modules
31110ebb
SR
1374/: prepare scripts FORCE
1375 $(cmd_crmodverdir)
1376 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1377 $(build)=$(build-dir)
1378%/: prepare scripts FORCE
7bb9d092 1379 $(cmd_crmodverdir)
06300b21 1380 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1381 $(build)=$(build-dir)
1382%.ko: prepare scripts FORCE
7bb9d092 1383 $(cmd_crmodverdir)
06300b21 1384 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1385 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1386 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1387
1da177e4
LT
1388# FIXME Should go into a make.lib or something
1389# ===========================================================================
1390
1391quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1392 cmd_rmdirs = rm -rf $(rm-dirs)
1393
1394quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1395 cmd_rmfiles = rm -f $(rm-files)
1396
bc3c26fe 1397# Run depmod only if we have System.map and depmod is executable
50a8ec31 1398quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
569658dd
MM
1399 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1400 $(KERNELRELEASE)
50a8ec31 1401
7bb9d092 1402# Create temporary dir for module support files
ab19f879
SR
1403# clean it up only when building all modules
1404cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1405 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1406
1da177e4
LT
1407# read all saved command lines
1408
1409targets := $(wildcard $(sort $(targets)))
1410cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1411
1412ifneq ($(cmd_files),)
1413 $(cmd_files): ; # Do not try to update included dependency files
1414 include $(cmd_files)
1415endif
1416
1da177e4
LT
1417# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1418# Usage:
1419# $(Q)$(MAKE) $(clean)=dir
1420clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1421
1da177e4
LT
1422endif # skip-makefile
1423
4f193362 1424PHONY += FORCE
1da177e4 1425FORCE:
4f193362 1426
4f193362 1427# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1428# information in a variable so we can use it in if_changed and friends.
4f193362 1429.PHONY: $(PHONY)