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Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvalds1ea6b8f2011-11-07 16:16:02 -08002PATCHLEVEL = 2
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvalds1ea6b8f2011-11-07 16:16:02 -08004EXTRAVERSION = -rc1
5NAME = Saber-toothed Squirrel
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
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
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080020unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080021LC_COLLATE=C
22LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010023export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025# 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
Cheng Renquanb8b06182009-05-26 16:03:07 +080044ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046endif
47ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49endif
50
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040051# Call a source code checker (by default, "sparse") as part of the
52# C compilation.
53#
54# Use 'make C=1' to enable checking of only re-compiled files.
55# Use 'make C=2' to enable checking of *all* source files, regardless
56# of whether they are re-compiled or not.
57#
58# See the file "Documentation/sparse.txt" for more details, including
59# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Cheng Renquanb8b06182009-05-26 16:03:07 +080061ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063endif
64ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66endif
67
68# Use make M=dir to specify directory of external module to build
69# Old syntax make ... SUBDIRS=$PWD is still supported
70# Setting the environment variable KBUILD_EXTMOD take precedence
71ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Cheng Renquanb8b06182009-05-26 16:03:07 +080075ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(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?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800101ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103endif
104
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100105ifeq ("$(origin W)", "command line")
Sam Ravnborg28bc20d2011-04-27 22:15:27 +0200106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100107endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500110PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111_all:
112
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100113# Cancel implicit rules on top Makefile
114$(CURDIR)/Makefile Makefile: ;
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116ifneq ($(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))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Milton Miller0b357862007-09-21 18:09:02 -0500124PHONY += $(MAKECMDGOALS) sub-make
125
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100126$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500127 $(Q)@:
128
129sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
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 ($(skip-makefile),)
142
143# If building an external module we do not care about the all: rule
144# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500145PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146ifeq ($(KBUILD_EXTMOD),)
147_all: all
148else
149_all: modules
150endif
151
152srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Amerigo Wang11294232009-06-19 03:40:26 -0400159export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
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/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900172 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
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.
Roland McGrath84336462009-12-21 16:24:06 -0800190# A third alternative is to store a setting in .config so that plain
191# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192# Default value for CROSS_COMPILE is not to prefix executables
193# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100194export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200195ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800196CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200199UTS_MACHINE := $(ARCH)
200SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Sam Ravnborgd746d642007-11-12 20:14:19 +0100202# Additional ARCH settings for x86
203ifeq ($(ARCH),i386)
204 SRCARCH := x86
205endif
206ifeq ($(ARCH),x86_64)
207 SRCARCH := x86
208endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200209
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000211ifeq ($(ARCH),sparc32)
212 SRCARCH := sparc
213endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200214ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200216endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200217
Paul Mundt3cc000b2009-04-11 08:39:27 +0900218# Additional ARCH settings for sh
219ifeq ($(ARCH),sh64)
220 SRCARCH := sh
221endif
222
Chris Metcalf18aecc22011-05-04 14:38:26 -0400223# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400224ifeq ($(ARCH),tilepro)
225 SRCARCH := tile
226endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400227ifeq ($(ARCH),tilegx)
228 SRCARCH := tile
229endif
230
Sam Ravnborg5e538792008-12-02 23:17:12 -0800231# Where to locate arch specific headers
232hdr-arch := $(SRCARCH)
233
Sam Ravnborg49148022009-01-16 21:58:10 +1000234ifeq ($(ARCH),m68knommu)
235 hdr-arch := m68k
236endif
237
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700238KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500239export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241# SHELL used by kbuild
242CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
243 else if [ -x /bin/bash ]; then echo /bin/bash; \
244 else echo sh; fi ; fi)
245
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200246HOSTCC = gcc
247HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800248HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200249HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200251# Decide whether to build built-in, modular, or both.
252# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254KBUILD_MODULES :=
255KBUILD_BUILTIN := 1
256
257# If we have only "make modules", don't compile built-in objects.
258# When we're building modules with modversions, we need to consider
259# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200260# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262ifeq ($(MAKECMDGOALS),modules)
263 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
264endif
265
266# If we have "make <whatever> modules", compile modules
267# in addition to whatever we do anyway.
268# Just "make" or "make all" shall build modules as well
269
270ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
271 KBUILD_MODULES := 1
272endif
273
274ifeq ($(MAKECMDGOALS),)
275 KBUILD_MODULES := 1
276endif
277
Sam Ravnborge579d352005-07-27 08:10:10 +0200278export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
280
281# Beautify output
282# ---------------------------------------------------------------------------
283#
284# Normally, we echo the whole command before executing it. By making
285# that echo $($(quiet)$(cmd)), we now have the possibility to set
286# $(quiet) to choose other forms of output instead, e.g.
287#
288# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
289# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
290#
291# If $(quiet) is empty, the whole command will be printed.
292# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200293# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294# the variable $(silent_cmd_cc_o_c) doesn't exist.
295#
Adrian Bunka58a4142006-01-10 00:08:17 +0100296# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297# for commands that shall be hidden in non-verbose mode.
298#
299# $(Q)ln $@ :<
300#
301# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
302# If KBUILD_VERBOSE equals 1 then the above command is displayed.
303
304ifeq ($(KBUILD_VERBOSE),1)
305 quiet =
306 Q =
307else
308 quiet=quiet_
309 Q = @
310endif
311
312# If the user is running make -s (silent mode), suppress echoing of
313# commands
314
315ifneq ($(findstring s,$(MAKEFLAGS)),)
316 quiet=silent_
317endif
318
319export quiet Q KBUILD_VERBOSE
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322# Look for make include files relative to root of kernel src
323MAKEFLAGS += --include-dir=$(srctree)
324
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100325# We need some generic definitions (do not try to remake the file).
326$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800327include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329# Make variables (CC, etc...)
330
331AS = $(CROSS_COMPILE)as
332LD = $(CROSS_COMPILE)ld
333CC = $(CROSS_COMPILE)gcc
334CPP = $(CC) -E
335AR = $(CROSS_COMPILE)ar
336NM = $(CROSS_COMPILE)nm
337STRIP = $(CROSS_COMPILE)strip
338OBJCOPY = $(CROSS_COMPILE)objcopy
339OBJDUMP = $(CROSS_COMPILE)objdump
340AWK = awk
341GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200342INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343DEPMOD = /sbin/depmod
344KALLSYMS = scripts/kallsyms
345PERL = perl
346CHECK = sparse
347
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100348CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
349 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200350CFLAGS_MODULE =
351AFLAGS_MODULE =
352LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353CFLAGS_KERNEL =
354AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700355CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
357
358# Use LINUXINCLUDE when you must reference the include/ directory.
359# Needed to be compatible with the O= option
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200360LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \
361 -Iarch/$(hdr-arch)/include/generated -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200362 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Michal Marek2a11c8e2011-07-20 17:38:57 +0200363 -include $(srctree)/include/linux/kconfig.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100365KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200367KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700368 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300369 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800370 -Wno-format-security \
371 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200372KBUILD_AFLAGS_KERNEL :=
373KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200374KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200375KBUILD_AFLAGS_MODULE := -DMODULE
376KBUILD_CFLAGS_MODULE := -DMODULE
377KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700379# Read KERNELRELEASE from include/config/kernel.release (if it exists)
380KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200381KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100382
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200383export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100384export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200385export CPP AR NM STRIP OBJCOPY OBJDUMP
386export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200387export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Sam Ravnborg06c50402007-10-15 22:17:25 +0200389export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700390export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200391export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200392export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200393export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200394export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396# When compiling out-of-tree modules, put MODVERDIR in the module
397# tree rather than in the kernel tree. The kernel tree might
398# even be read-only.
399export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401# Files to ignore in find ... statements
402
Trond Myklebust406119f2005-10-27 14:46:53 -0400403RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
404export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406# ===========================================================================
407# Rules shared between *config targets and build targets
408
409# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500410PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411scripts_basic:
412 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500413 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200415# To avoid any implicit rule to kick in, define an empty command.
416scripts/basic/%: scripts_basic ;
417
Paul Smith4f193362006-03-05 17:14:10 -0500418PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200419# outputmakefile generates a Makefile in the output directory, if using a
420# separate output directory. This allows convenient use of make in the
421# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200423ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100424 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200425 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
426 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
427endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200429# Support for using generic headers in asm-generic
430PHONY += asm-generic
431asm-generic:
432 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
433 obj=arch/$(SRCARCH)/include/generated/asm
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435# To make sure we do not include .config for any of the *config targets
436# catch them early, and hand them over to scripts/kconfig/Makefile
437# It is allowed to specify more targets when calling make, including
438# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200439# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440# Detect when mixed targets is specified, and make a second invocation
441# of make so .config is not included in this case either (for *config).
442
Roman Zippel3eb3c742007-01-10 14:45:28 +0100443no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800444 cscope gtags TAGS tags help %docs check% coccicheck \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100445 include/linux/version.h headers_% \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700446 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448config-targets := 0
449mixed-targets := 0
450dot-config := 1
451
452ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
453 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
454 dot-config := 0
455 endif
456endif
457
458ifeq ($(KBUILD_EXTMOD),)
459 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
460 config-targets := 1
461 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
462 mixed-targets := 1
463 endif
464 endif
465endif
466
467ifeq ($(mixed-targets),1)
468# ===========================================================================
469# We're called with mixed targets (*config and build targets).
470# Handle them one by one.
471
472%:: FORCE
473 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
474
475else
476ifeq ($(config-targets),1)
477# ===========================================================================
478# *config targets only - make sure prerequisites are updated, and descend
479# in scripts/kconfig to make the *config target
480
481# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
482# KBUILD_DEFCONFIG may point out an alternative default configuration
483# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200484include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400485export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100487config: scripts_basic outputmakefile FORCE
488 $(Q)mkdir -p include/linux include/config
489 $(Q)$(MAKE) $(build)=scripts/kconfig $@
490
491%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700492 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 $(Q)$(MAKE) $(build)=scripts/kconfig $@
494
495else
496# ===========================================================================
497# Build targets only - this includes vmlinux, arch specific targets, clean
498# targets and others. In general all targets except *config targets.
499
500ifeq ($(KBUILD_EXTMOD),)
501# Additional helpers built in scripts/
502# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200503# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500504PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100505scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 $(Q)$(MAKE) $(build)=$(@)
507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508# Objects we will link into vmlinux / subdirs we need to visit
509init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100510drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511net-y := net/
512libs-y := lib/
513core-y := usr/
514endif # KBUILD_EXTMOD
515
516ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200517# Read in config
518-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200520ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521# Read in dependencies to all Kconfig* files, make sure to run
522# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700523-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700526$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Roman Zippelc955cca2006-06-08 22:12:39 -0700528# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100529# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200530# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100531# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100532include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
534else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200535# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200536# but do not care if they are up-to-date. Use auto.conf to trigger the test
537PHONY += include/config/auto.conf
538
539include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200540 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200541 echo; \
542 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200543 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200544 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
545 echo; \
546 /bin/false)
547
548endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550else
551# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700552include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200553endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
555# The all: target is the default when no target is given on the
556# command line.
557# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200558# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559all: vmlinux
560
561ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200562KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200564KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565endif
566
Ralf Baechlebef5b542008-07-16 13:02:24 +0100567include $(srctree)/arch/$(SRCARCH)/Makefile
568
Mike Frysinger08f67462009-06-04 16:29:08 -0700569ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100570KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
571endif
572
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100573# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900574ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100575KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900576endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100577
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400578# This warning generated too much noise in a regular build.
579# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200580KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200583KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100585# Some targets (ARM with Thumb2, for example), can't be built with frame
586# pointers. For those, we don't have FUNCTION_TRACER automatically
587# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
588# incompatible with -fomit-frame-pointer with current GCC, so we don't use
589# -fomit-frame-pointer with FUNCTION_TRACER.
590ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200591KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100593endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
595ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200596KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200597KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598endif
599
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200600ifdef CONFIG_DEBUG_INFO_REDUCED
601KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
602endif
603
Steven Rostedt606576c2008-10-06 19:06:12 -0400604ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200605KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400606ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400607 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400608 BUILD_C_RECORDMCOUNT := y
609 export BUILD_C_RECORDMCOUNT
610 endif
611endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200612endif
613
Sam Ravnborg91341d42008-01-21 21:31:44 +0100614# We trigger additional mismatches with less inlining
615ifdef CONFIG_DEBUG_SECTION_MISMATCH
616KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
617endif
618
Sam Ravnborge8e69932005-04-30 16:51:42 -0700619# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700620NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700621CHECKFLAGS += $(NOSTDINC_FLAGS)
622
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200624KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200626# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200627KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400629# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700630KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700631
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700632# conserve stack if available
633KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
634
Michal Marek40df7592011-04-20 13:45:30 +0200635# use the deterministic mode of AR if available
636KBUILD_ARFLAGS := $(call ar-option,D)
637
Jason Baronbf5438fc2010-09-17 11:09:00 -0400638# check for 'asm goto'
639ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
640 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
641endif
642
Sam Ravnborg06c50402007-10-15 22:17:25 +0200643# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100644# But warn user when we do so
645warn-assign = \
646$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
647
648ifneq ($(KCPPFLAGS),)
649 $(call warn-assign,CPPFLAGS)
650 KBUILD_CPPFLAGS += $(KCPPFLAGS)
651endif
652ifneq ($(KAFLAGS),)
653 $(call warn-assign,AFLAGS)
654 KBUILD_AFLAGS += $(KAFLAGS)
655endif
656ifneq ($(KCFLAGS),)
657 $(call warn-assign,CFLAGS)
658 KBUILD_CFLAGS += $(KCFLAGS)
659endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200660
Roland McGrath18991192007-07-19 01:48:40 -0700661# Use --build-id when available.
662LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200663 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200664KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700665LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
666
David Howells5d7d18f2009-03-04 11:59:07 -0800667ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200668LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800669endif
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200672# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673# set in the environment
674# Also any assignments in arch/$(ARCH)/Makefile take precedence over
675# this default value
676export KBUILD_IMAGE ?= vmlinux
677
678#
679# INSTALL_PATH specifies where to place the updated kernel and system map
680# images. Default is /boot, but you can set it to other values
681export INSTALL_PATH ?= /boot
682
683#
684# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
685# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200686# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687#
688
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100689MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690export MODLIB
691
Theodore Ts'oac031f22006-06-21 20:53:09 -0400692#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100693# INSTALL_MOD_STRIP, if defined, will cause modules to be
694# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
695# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100696# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100697
Theodore Ts'oac031f22006-06-21 20:53:09 -0400698ifdef INSTALL_MOD_STRIP
699ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100700mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400701else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100702mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400703endif # INSTALL_MOD_STRIP=1
704else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100705mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400706endif # INSTALL_MOD_STRIP
707export mod_strip_cmd
708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100711core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
714 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
715 $(net-y) $(net-m) $(libs-y) $(libs-m)))
716
717vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
718 $(init-n) $(init-) \
719 $(core-n) $(core-) $(drivers-n) $(drivers-) \
720 $(net-n) $(net-) $(libs-n) $(libs-))))
721
722init-y := $(patsubst %/, %/built-in.o, $(init-y))
723core-y := $(patsubst %/, %/built-in.o, $(core-y))
724drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
725net-y := $(patsubst %/, %/built-in.o, $(net-y))
726libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
727libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
728libs-y := $(libs-y1) $(libs-y2)
729
730# Build vmlinux
731# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200732# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200734# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735# Ordering when linking is important, and $(vmlinux-init) must be first.
736#
737# vmlinux
738# ^
739# |
740# +-< $(vmlinux-init)
741# | +--< init/version.o + more
742# |
743# +--< $(vmlinux-main)
744# | +--< driver/built-in.o mm/built-in.o + more
745# |
746# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
747#
748# vmlinux version (uname -v) cannot be updated during normal
749# descending-into-subdirs phase since we do not yet know if we need to
750# update vmlinux.
751# Therefore this step is delayed until just before final link of vmlinux -
752# except in the kallsyms case where it is done just before adding the
753# symbols to the kernel.
754#
755# System.map is generated to document addresses of all kernel symbols
756
757vmlinux-init := $(head-y) $(init-y)
758vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
759vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200760vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100761export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
763# Rule to link vmlinux - also used during CONFIG_KALLSYMS
764# May be overridden by arch/$(ARCH)/Makefile
765quiet_cmd_vmlinux__ ?= LD $@
766 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
767 -T $(vmlinux-lds) $(vmlinux-init) \
768 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200769 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771# Generate new vmlinux version
772quiet_cmd_vmlinux_version = GEN .version
773 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200774 if [ ! -r .version ]; then \
775 rm -f .version; \
776 echo 1 >.version; \
777 else \
778 mv .version .old_version; \
779 expr 0$$(cat .old_version) + 1 >.version; \
780 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 $(MAKE) $(build)=init
782
783# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200784quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
786
787# Link of vmlinux
788# If CONFIG_KALLSYMS is set .version is already updated
789# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700790# Use + in front of the vmlinux_version rule to silent warning with make -j2
791# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700793 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
795
796 $(call cmd,vmlinux__)
797 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
798
Sam Ravnborg46352812006-08-08 21:41:18 +0200799 $(Q)$(if $($(quiet)cmd_sysmap), \
800 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
801 $(cmd_sysmap) $@ System.map; \
802 if [ $$? -ne 0 ]; then \
803 rm -f $@; \
804 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 fi;
806 $(verify_kallsyms)
807endef
808
809
810ifdef CONFIG_KALLSYMS
811# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
812# It's a three stage process:
813# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
814# empty
815# Running kallsyms on that gives us .tmp_kallsyms1.o with
816# the right size - vmlinux version (uname -v) is updated during this step
817# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
818# but due to the added section, some addresses have shifted.
819# From here, we generate a correct .tmp_kallsyms2.o
820# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
821# o Verify that the System.map from vmlinux matches the map from
822# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300823# o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
825# temporary bypass to allow the kernel to be built while the
826# maintainers work out what went wrong with kallsyms.
827
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828last_kallsyms := 2
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300829
830ifdef KALLSYMS_EXTRA_PASS
831ifneq ($(KALLSYMS_EXTRA_PASS),0)
832last_kallsyms := 3
833endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834endif
835
836kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
837
838define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200839 $(Q)$(if $($(quiet)cmd_sysmap), \
840 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200842 $(Q)cmp -s System.map .tmp_System.map || \
843 (echo Inconsistent kallsyms data; \
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300844 echo This is a bug - please report about it; \
845 echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 rm .tmp_kallsyms* ; /bin/false )
847endef
848
849# Update vmlinux version before link
850# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200851# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852cmd_ksym_ld = $(cmd_vmlinux__)
853define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200854 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 +$(call cmd,vmlinux_version)
856 $(call cmd,vmlinux__)
857 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
858endef
859
860# Generate .S file with all kernel symbols
861quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100862 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
863 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100865.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 $(call if_changed_dep,as_o_S)
867
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100868.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 $(call cmd,kallsyms)
870
871# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100872.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
873 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100875.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
876 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100878.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
879 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881# Needs to visit scripts/ before $(KALLSYMS) can be used.
882$(KALLSYMS): scripts ;
883
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000884# Generate some data for debugging strange kallsyms problems
885debug_kallsyms: .tmp_map$(last_kallsyms)
886
887.tmp_map%: .tmp_vmlinux% FORCE
888 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
889
890.tmp_map3: .tmp_map2
891
892.tmp_map2: .tmp_map1
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894endif # ifdef CONFIG_KALLSYMS
895
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200896# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
897# relevant sections renamed as per the linker script.
898quiet_cmd_vmlinux-modpost = LD $@
899 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
900 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200901 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200902define rule_vmlinux-modpost
903 :
904 +$(call cmd,vmlinux-modpost)
905 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
906 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
907endef
908
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100910vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700911ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100912 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700913endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700914ifdef CONFIG_SAMPLES
915 $(Q)$(MAKE) $(build)=samples
916endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700917ifdef CONFIG_BUILD_DOCSRC
918 $(Q)$(MAKE) $(build)=Documentation
919endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200920 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200922 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
Sam Ravnborg310f8242008-01-21 22:57:09 +0100924# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100925ifdef CONFIG_KALLSYMS
926.tmp_vmlinux1: vmlinux.o
927endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200928
929modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
930vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200931 $(call if_changed_rule,vmlinux-modpost)
932
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933# The actual objects are generated when descending,
934# make sure no implicit rule kicks in
935$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
936
937# Handle descending into subdirectories listed in $(vmlinux-dirs)
938# Preset locale variables to speed up the build process. Limit locale
939# tweaks to this spot to avoid wrong language settings when running
940# make menuconfig etc.
941# Error messages still appears in the original language
942
Paul Smith4f193362006-03-05 17:14:10 -0500943PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200944$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 $(Q)$(MAKE) $(build)=$@
946
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700947# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700948include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100949 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200950 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100951
952
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200954# or the modules are listed in "prepare".
955# A multi level approach is used. prepareN is processed before prepareN-1.
956# archprepare is used in arch Makefiles and when processed asm symlink,
957# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200959# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500960PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200961
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200962# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963# and if so do:
964# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700965prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500967 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700968 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 echo " $(srctree) is not clean, please run 'make mrproper'";\
970 echo " in the '$(srctree)' directory.";\
971 /bin/false; \
972 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973endif
974
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200975# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200976prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
Sam Ravnborg273b2812009-10-18 00:52:28 +0200978prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200979 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200980 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200982archprepare: prepare1 scripts_basic
983
984prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200985 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200986
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800988prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990# Generate some files
991# ---------------------------------------------------------------------------
992
993# KERNELRELEASE can change from a few different places, meaning version.h
994# needs to be updated, so this check is forced on all builds
995
996uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200997define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200999 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1000 exit 1; \
1001 fi; \
1002 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003endef
1004
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001005define filechk_version.h
1006 (echo \#define LINUX_VERSION_CODE $(shell \
Michal Marek78d3bb42011-05-30 13:37:20 +02001007 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001008 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1009endef
1010
1011include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 $(call filechk,version.h)
1013
Sam Ravnborg273b2812009-10-18 00:52:28 +02001014include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001015 $(call filechk,utsrelease.h)
1016
Vegard Nossum179efcb2008-12-16 12:33:43 +01001017PHONY += headerdep
1018headerdep:
Peter Foley9663d982011-04-26 17:17:11 -04001019 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1020 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +01001021
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022# ---------------------------------------------------------------------------
1023
Paul Smith4f193362006-03-05 17:14:10 -05001024PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025depend dep:
1026 @echo '*** Warning: make $@ is unnecessary now.'
1027
1028# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001029# Firmware install
1030INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1031export INSTALL_FW_PATH
1032
1033PHONY += firmware_install
1034firmware_install: FORCE
1035 @mkdir -p $(objtree)/firmware
1036 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1037
1038# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001039# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001040
Sam Ravnborge6883b12008-06-05 16:43:46 +02001041#Default location for installed headers
1042export INSTALL_HDR_PATH = $(objtree)/usr
1043
Sam Ravnborge6883b12008-06-05 16:43:46 +02001044hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001045
1046# If we do an all arch process set dst to asm-$(hdr-arch)
1047hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001048
1049PHONY += __headers
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001050__headers: include/linux/version.h scripts_basic asm-generic FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001051 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001052
1053PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001054headers_install_all:
1055 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001056
David Woodhouse8d730cf2006-06-18 11:58:39 +01001057PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001058headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001059 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001060 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001061 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001062 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001063
Mike Frysinger1f857122007-02-14 00:33:02 -08001064PHONY += headers_check_all
1065headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001066 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001067
David Woodhouse68475352006-06-18 12:02:10 +01001068PHONY += headers_check
1069headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001070 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001071 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001072
David Woodhouse8d730cf2006-06-18 11:58:39 +01001073# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074# Modules
1075
1076ifdef CONFIG_MODULES
1077
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001078# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
Michal Marek73d13932010-03-10 12:28:58 +01001080all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
1082# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001083#
1084# A module can be listed more than once in obj-m resulting in
1085# duplicate lines in modules.order files. Those are removed
1086# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087
Paul Smith4f193362006-03-05 17:14:10 -05001088PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001089modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001090 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001091 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001092 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001093 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Michal Mareka6c36632010-03-08 10:07:12 +01001095modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1096 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1097
Michal Marek73d13932010-03-10 12:28:58 +01001098%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001099 $(Q)$(MAKE) $(modbuiltin)=$*
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
1102# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001103PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001104modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
1106# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001107PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108modules_install: _modinst_ _modinst_post
1109
Paul Smith4f193362006-03-05 17:14:10 -05001110PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001111_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 @rm -rf $(MODLIB)/kernel
1113 @rm -f $(MODLIB)/source
1114 @mkdir -p $(MODLIB)/kernel
1115 @ln -s $(srctree) $(MODLIB)/source
1116 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1117 rm -f $(MODLIB)/build ; \
1118 ln -s $(objtree) $(MODLIB)/build ; \
1119 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001120 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001121 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001122 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001124# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125# boot a modules.dep even before / is mounted read-write. However the
1126# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001127PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001130 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
1132else # CONFIG_MODULES
1133
1134# Modules not configured
1135# ---------------------------------------------------------------------------
1136
1137modules modules_install: FORCE
1138 @echo
1139 @echo "The present kernel configuration has modules disabled."
1140 @echo "Type 'make config' and enable loadable module support."
1141 @echo "Then build a kernel with module support enabled."
1142 @echo
1143 @exit 1
1144
1145endif # CONFIG_MODULES
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147###
1148# Cleaning is done on three levels.
1149# make clean Delete most generated files
1150# Leave enough to build external modules
1151# make mrproper Delete the current configuration, and all generated files
1152# make distclean Remove editor backup files, patch leftover files and the like
1153
1154# Directories & files removed with 'make clean'
1155CLEAN_DIRS += $(MODVERDIR)
1156CLEAN_FILES += vmlinux System.map \
1157 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1158
1159# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001160MRPROPER_DIRS += include/config usr/include include/generated \
1161 arch/*/include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001162MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001163 include/linux/version.h \
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001164 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
1166# clean - Delete most, but leave enough to build external modules
1167#
1168clean: rm-dirs := $(CLEAN_DIRS)
1169clean: rm-files := $(CLEAN_FILES)
Michal Marekc47f2142010-09-03 15:00:22 +02001170clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Paul Smith4f193362006-03-05 17:14:10 -05001172PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173$(clean-dirs):
1174 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1175
Michal Marek88d7be02010-09-06 12:00:08 +02001176clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177
1178# mrproper - Delete all generated files, including .config
1179#
1180mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1181mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1182mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1183
Paul Smith4f193362006-03-05 17:14:10 -05001184PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185$(mrproper-dirs):
1186 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1187
1188mrproper: clean archmrproper $(mrproper-dirs)
1189 $(call cmd,rmdirs)
1190 $(call cmd,rmfiles)
1191
1192# distclean
1193#
Paul Smith4f193362006-03-05 17:14:10 -05001194PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
1196distclean: mrproper
1197 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001198 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Michal Marekf4b129f2011-08-10 13:10:20 +02001200 -o -name '.*.rej' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1202 -type f -print | xargs rm -f
1203
1204
1205# Packaging of the kernel to various formats
1206# ---------------------------------------------------------------------------
1207# rpm target kept for backward compatibility
1208package-dir := $(srctree)/scripts/package
1209
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001210%src-pkg: FORCE
1211 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001212%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001213 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001214rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001215 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
1217
1218# Brief documentation of the typical targets used
1219# ---------------------------------------------------------------------------
1220
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001221boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001223board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1224board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226help:
1227 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001228 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001229 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001230 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001231 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 @echo ''
1233 @echo 'Configuration targets:'
1234 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1235 @echo ''
1236 @echo 'Other generic targets:'
1237 @echo ' all - Build all targets marked with [*]'
1238 @echo '* vmlinux - Build the bare kernel'
1239 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001240 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001241 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1242 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001244 @echo ' dir/file.[oisS] - Build specified target only'
1245 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1246 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001247 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001248 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 @echo ' tags/TAGS - Generate tags file for editors'
1250 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001251 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001252 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001253 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001254 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001255 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001256 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 @echo ' checkstack - Generate a list of stack hogs'
1259 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001260 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001261 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001262 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001263 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001264 @echo ' headerdep - Detect inclusion cycles in headers'
1265 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1266 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001268 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 @echo ''
1270 @echo 'Documentation targets:'
1271 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1272 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001273 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001275 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 @echo ''
1277 @$(if $(boards), \
1278 $(foreach b, $(boards), \
1279 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1280 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001281 @$(if $(board-dirs), \
1282 $(foreach b, $(board-dirs), \
1283 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1284 printf " %-16s - Show all of the above\\n" help-boards; \
1285 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286
1287 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001288 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001290 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1291 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001292 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001293 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1294 @echo ' 1: warnings which may be relevant and do not occur too often'
1295 @echo ' 2: warnings which occur quite often but may still be relevant'
1296 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001297 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 @echo ''
1299 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1300 @echo 'For further info see the ./README file'
1301
1302
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001303help-board-dirs := $(addprefix help-,$(board-dirs))
1304
1305help-boards: $(help-board-dirs)
1306
1307boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1308
1309$(help-board-dirs): help-%:
1310 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1311 @$(if $(boards-per-dir), \
1312 $(foreach b, $(boards-per-dir), \
1313 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1314 echo '')
1315
1316
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317# Documentation targets
1318# ---------------------------------------------------------------------------
1319%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001320 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1322
1323else # KBUILD_EXTMOD
1324
1325###
1326# External module support.
1327# When building external modules the kernel used as basis is considered
1328# read-only, and no consistency checks are made and the make
1329# system is not used on the basis kernel. If updates are required
1330# in the basis kernel ordinary make commands (without M=...) must
1331# be used.
1332#
1333# The following are the only valid targets when building external
1334# modules.
1335# make M=dir clean Delete all automatically generated files
1336# make M=dir modules Make all modules in specified dir
1337# make M=dir Same as 'make M=dir modules'
1338# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001339# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340# Assumes install directory is already created
1341
1342# We are always building modules
1343KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001344PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001346 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
Paul Smith4f193362006-03-05 17:14:10 -05001348PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349$(objtree)/Module.symvers:
1350 @test -e $(objtree)/Module.symvers || ( \
1351 echo; \
1352 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1353 echo " is missing; modules will have no dependencies and modversions."; \
1354 echo )
1355
1356module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001357PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358$(module-dirs): crmodverdir $(objtree)/Module.symvers
1359 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1360
1361modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001362 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001363 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
Paul Smith4f193362006-03-05 17:14:10 -05001365PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001366modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001367
Paul Smith4f193362006-03-05 17:14:10 -05001368install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1369PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001370_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001371 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001372 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Paul Smith4f193362006-03-05 17:14:10 -05001374PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001375_emodinst_post: _emodinst_
1376 $(call cmd,depmod)
1377
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1379
Paul Smith4f193362006-03-05 17:14:10 -05001380PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381$(clean-dirs):
1382 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1383
1384clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001385clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387help:
1388 @echo ' Building external modules.'
1389 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1390 @echo ''
1391 @echo ' modules - default target, build the module(s)'
1392 @echo ' modules_install - install the module'
1393 @echo ' clean - remove generated files in module directory only'
1394 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001395
1396# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001397PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001398prepare: ;
1399scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400endif # KBUILD_EXTMOD
1401
Michal Marek88d7be02010-09-06 12:00:08 +02001402clean: $(clean-dirs)
1403 $(call cmd,rmdirs)
1404 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001405 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001406 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1407 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1408 -o -name '*.symtypes' -o -name 'modules.order' \
1409 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1410 -o -name '*.gcno' \) -type f -print | xargs rm -f
1411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412# Generate tags for editors
1413# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001414quiet_cmd_tags = GEN $@
1415 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001417tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 $(call cmd,tags)
1419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420# Scripts to check various things for consistency
1421# ---------------------------------------------------------------------------
1422
Peter Foley279f3dd2011-04-26 17:15:01 -04001423PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1424
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001426 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001428 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429
1430versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001431 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001433 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434
Nicolas Palix74425ee2010-06-06 17:15:01 +02001435coccicheck:
1436 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1437
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438namespacecheck:
1439 $(PERL) $(srctree)/scripts/namespace.pl
1440
Adrian Bunk295ac052007-08-24 23:04:56 +02001441export_report:
1442 $(PERL) $(srctree)/scripts/export_report.pl
1443
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444endif #ifeq ($(config-targets),1)
1445endif #ifeq ($(mixed-targets),1)
1446
Roman Zippelc30a02e2006-06-08 22:12:50 -07001447PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001448
Jeff Dike011e3a92006-12-13 00:34:12 -08001449# UML needs a little special treatment here. It wants to use the host
1450# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1451# else wants $(ARCH), including people doing cross-builds, which means
1452# that $(SUBARCH) doesn't work here.
1453ifeq ($(ARCH), um)
1454CHECKSTACK_ARCH := $(SUBARCH)
1455else
1456CHECKSTACK_ARCH := $(ARCH)
1457endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458checkstack:
1459 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001460 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001462kernelrelease:
1463 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001464
Sam Ravnborgcb584552006-01-09 21:20:34 +01001465kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001466 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467
Sam Ravnborg06300b22006-01-25 07:13:18 +01001468# Single targets
1469# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001470# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001471# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001472# - build with separate output dir 'make O=...'
1473# - external modules
1474#
1475# target-dir => where to store outputfile
1476# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001477
Sam Ravnborg06300b22006-01-25 07:13:18 +01001478ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001479 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001480 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001481else
1482 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001483 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1484 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001485endif
1486
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001487%.s: %.c prepare scripts FORCE
1488 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1489%.i: %.c prepare scripts FORCE
1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1491%.o: %.c prepare scripts FORCE
1492 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1493%.lst: %.c prepare scripts FORCE
1494 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1495%.s: %.S prepare scripts FORCE
1496 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1497%.o: %.S prepare scripts FORCE
1498 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001499%.symtypes: %.c prepare scripts FORCE
1500 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001501
1502# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001503/: prepare scripts FORCE
1504 $(cmd_crmodverdir)
1505 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1506 $(build)=$(build-dir)
1507%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001508 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001509 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001510 $(build)=$(build-dir)
1511%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001512 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001513 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001514 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001515 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001516
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517# FIXME Should go into a make.lib or something
1518# ===========================================================================
1519
1520quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1521 cmd_rmdirs = rm -rf $(rm-dirs)
1522
1523quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1524 cmd_rmfiles = rm -f $(rm-files)
1525
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001526# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001527quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001528 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1529 $(KERNELRELEASE)
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001530
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001531# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001532# clean it up only when building all modules
1533cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1534 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Sam Ravnborg222d3942007-10-15 21:59:31 +02001536a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg80c00ba2010-07-28 19:11:27 +02001537 $(KBUILD_AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001538 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001539 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
1541quiet_cmd_as_o_S = AS $@
1542cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1543
1544# read all saved command lines
1545
1546targets := $(wildcard $(sort $(targets)))
1547cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1548
1549ifneq ($(cmd_files),)
1550 $(cmd_files): ; # Do not try to update included dependency files
1551 include $(cmd_files)
1552endif
1553
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1555# Usage:
1556# $(Q)$(MAKE) $(clean)=dir
1557clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1558
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559endif # skip-makefile
1560
Paul Smith4f193362006-03-05 17:14:10 -05001561PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001563
Paul Smith4f193362006-03-05 17:14:10 -05001564# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001565# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001566.PHONY: $(PHONY)