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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds57f8f7b2008-10-23 20:06:52 -07003SUBLEVEL = 28
Linus Torvalds4a6908a2008-12-24 15:26:37 -08004EXTRAVERSION =
Linus Torvalds061e41f2008-12-01 19:59:23 -08005NAME = Erotic Pickled Herring
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
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040047# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(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?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114ifneq ($(KBUILD_OUTPUT),)
115# Invoke a second make in the output directory, passing relevant variables
116# check that the output directory actually exists
117saved-output := $(KBUILD_OUTPUT)
118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119$(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Milton Miller0b357862007-09-21 18:09:02 -0500122PHONY += $(MAKECMDGOALS) sub-make
123
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500125 $(Q)@:
126
127sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133# Leave processing to above invocation of make
134skip-makefile := 1
135endif # ifneq ($(KBUILD_OUTPUT),)
136endif # ifeq ($(KBUILD_SRC),)
137
138# We process the rest of the Makefile if this is the final invocation of make
139ifeq ($(skip-makefile),)
140
141# If building an external module we do not care about the all: rule
142# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500143PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144ifeq ($(KBUILD_EXTMOD),)
145_all: all
146else
147_all: modules
148endif
149
150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151TOPDIR := $(srctree)
152# FIXME - TOPDIR is obsolete, use srctree/objtree
153objtree := $(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
159export srctree objtree VPATH TOPDIR
160
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 Mundt12760cb2007-11-23 14:24:25 +0900172 -e s/sh.*/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.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100192export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200197UTS_MACHINE := $(ARCH)
198SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Sam Ravnborgd746d642007-11-12 20:14:19 +0100200# Additional ARCH settings for x86
201ifeq ($(ARCH),i386)
202 SRCARCH := x86
203endif
204ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200207
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200208# Where to locate arch specific headers
Sam Ravnborga439fe52008-07-27 23:00:59 +0200209ifeq ($(ARCH),sparc64)
210 hdr-arch := sparc
211else
212 hdr-arch := $(SRCARCH)
213endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200214
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700215KCONFIG_CONFIG ?= .config
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217# SHELL used by kbuild
218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
219 else if [ -x /bin/bash ]; then echo /bin/bash; \
220 else echo sh; fi ; fi)
221
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200222HOSTCC = gcc
223HOSTCXX = g++
224HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
225HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200227# Decide whether to build built-in, modular, or both.
228# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230KBUILD_MODULES :=
231KBUILD_BUILTIN := 1
232
233# If we have only "make modules", don't compile built-in objects.
234# When we're building modules with modversions, we need to consider
235# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200236# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238ifeq ($(MAKECMDGOALS),modules)
239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
240endif
241
242# If we have "make <whatever> modules", compile modules
243# in addition to whatever we do anyway.
244# Just "make" or "make all" shall build modules as well
245
246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
247 KBUILD_MODULES := 1
248endif
249
250ifeq ($(MAKECMDGOALS),)
251 KBUILD_MODULES := 1
252endif
253
Sam Ravnborge579d352005-07-27 08:10:10 +0200254export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
256
257# Beautify output
258# ---------------------------------------------------------------------------
259#
260# Normally, we echo the whole command before executing it. By making
261# that echo $($(quiet)$(cmd)), we now have the possibility to set
262# $(quiet) to choose other forms of output instead, e.g.
263#
264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
266#
267# If $(quiet) is empty, the whole command will be printed.
268# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200269# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270# the variable $(silent_cmd_cc_o_c) doesn't exist.
271#
Adrian Bunka58a4142006-01-10 00:08:17 +0100272# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273# for commands that shall be hidden in non-verbose mode.
274#
275# $(Q)ln $@ :<
276#
277# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
278# If KBUILD_VERBOSE equals 1 then the above command is displayed.
279
280ifeq ($(KBUILD_VERBOSE),1)
281 quiet =
282 Q =
283else
284 quiet=quiet_
285 Q = @
286endif
287
288# If the user is running make -s (silent mode), suppress echoing of
289# commands
290
291ifneq ($(findstring s,$(MAKEFLAGS)),)
292 quiet=silent_
293endif
294
295export quiet Q KBUILD_VERBOSE
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298# Look for make include files relative to root of kernel src
299MAKEFLAGS += --include-dir=$(srctree)
300
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100301# We need some generic definitions (do not try to remake the file).
302$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800303include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305# Make variables (CC, etc...)
306
307AS = $(CROSS_COMPILE)as
308LD = $(CROSS_COMPILE)ld
309CC = $(CROSS_COMPILE)gcc
310CPP = $(CC) -E
311AR = $(CROSS_COMPILE)ar
312NM = $(CROSS_COMPILE)nm
313STRIP = $(CROSS_COMPILE)strip
314OBJCOPY = $(CROSS_COMPILE)objcopy
315OBJDUMP = $(CROSS_COMPILE)objdump
316AWK = awk
317GENKSYMS = scripts/genksyms/genksyms
318DEPMOD = /sbin/depmod
319KALLSYMS = scripts/kallsyms
320PERL = perl
321CHECK = sparse
322
Al Viroaf4ca452005-10-21 02:55:38 -0400323CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324MODFLAGS = -DMODULE
325CFLAGS_MODULE = $(MODFLAGS)
326AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700327LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328CFLAGS_KERNEL =
329AFLAGS_KERNEL =
330
331
332# Use LINUXINCLUDE when you must reference the include/ directory.
333# Needed to be compatible with the O= option
334LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100335 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200336 -I$(srctree)/arch/$(hdr-arch)/include \
337 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100339KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200341KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700342 -fno-strict-aliasing -fno-common \
343 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200344KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700346# Read KERNELRELEASE from include/config/kernel.release (if it exists)
347KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100348KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100349
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200350export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100351export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200352export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
353export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Sam Ravnborg06c50402007-10-15 22:17:25 +0200355export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200356export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200357export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
359# When compiling out-of-tree modules, put MODVERDIR in the module
360# tree rather than in the kernel tree. The kernel tree might
361# even be read-only.
362export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
363
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364# Files to ignore in find ... statements
365
Trond Myklebust406119f2005-10-27 14:46:53 -0400366RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
367export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369# ===========================================================================
370# Rules shared between *config targets and build targets
371
372# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500373PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374scripts_basic:
375 $(Q)$(MAKE) $(build)=scripts/basic
376
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200377# To avoid any implicit rule to kick in, define an empty command.
378scripts/basic/%: scripts_basic ;
379
Paul Smith4f193362006-03-05 17:14:10 -0500380PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200381# outputmakefile generates a Makefile in the output directory, if using a
382# separate output directory. This allows convenient use of make in the
383# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200385ifneq ($(KBUILD_SRC),)
386 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
387 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
388endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390# To make sure we do not include .config for any of the *config targets
391# catch them early, and hand them over to scripts/kconfig/Makefile
392# It is allowed to specify more targets when calling make, including
393# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200394# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395# Detect when mixed targets is specified, and make a second invocation
396# of make so .config is not included in this case either (for *config).
397
Roman Zippel3eb3c742007-01-10 14:45:28 +0100398no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700399 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100400 include/linux/version.h headers_% \
401 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403config-targets := 0
404mixed-targets := 0
405dot-config := 1
406
407ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
408 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
409 dot-config := 0
410 endif
411endif
412
413ifeq ($(KBUILD_EXTMOD),)
414 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
415 config-targets := 1
416 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
417 mixed-targets := 1
418 endif
419 endif
420endif
421
422ifeq ($(mixed-targets),1)
423# ===========================================================================
424# We're called with mixed targets (*config and build targets).
425# Handle them one by one.
426
427%:: FORCE
428 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
429
430else
431ifeq ($(config-targets),1)
432# ===========================================================================
433# *config targets only - make sure prerequisites are updated, and descend
434# in scripts/kconfig to make the *config target
435
436# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
437# KBUILD_DEFCONFIG may point out an alternative default configuration
438# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200439include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400440export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100442config: scripts_basic outputmakefile FORCE
443 $(Q)mkdir -p include/linux include/config
444 $(Q)$(MAKE) $(build)=scripts/kconfig $@
445
446%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700447 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 $(Q)$(MAKE) $(build)=scripts/kconfig $@
449
450else
451# ===========================================================================
452# Build targets only - this includes vmlinux, arch specific targets, clean
453# targets and others. In general all targets except *config targets.
454
455ifeq ($(KBUILD_EXTMOD),)
456# Additional helpers built in scripts/
457# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200458# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500459PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700460scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 $(Q)$(MAKE) $(build)=$(@)
462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463# Objects we will link into vmlinux / subdirs we need to visit
464init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100465drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466net-y := net/
467libs-y := lib/
468core-y := usr/
469endif # KBUILD_EXTMOD
470
471ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200472# Read in config
473-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200475ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476# Read in dependencies to all Kconfig* files, make sure to run
477# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700478-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700481$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Roman Zippelc955cca2006-06-08 22:12:39 -0700483# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100484# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200485# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100486# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700487include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
489else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200490# external modules needs include/linux/autoconf.h and include/config/auto.conf
491# but do not care if they are up-to-date. Use auto.conf to trigger the test
492PHONY += include/config/auto.conf
493
494include/config/auto.conf:
495 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
496 echo; \
497 echo " ERROR: Kernel configuration is invalid."; \
498 echo " include/linux/autoconf.h or $@ are missing."; \
499 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
500 echo; \
501 /bin/false)
502
503endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505else
506# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700507include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200508endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510# The all: target is the default when no target is given on the
511# command line.
512# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200513# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514all: vmlinux
515
516ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200517KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200519KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520endif
521
Ralf Baechlebef5b542008-07-16 13:02:24 +0100522include $(srctree)/arch/$(SRCARCH)/Makefile
523
Andi Kleen35bb5b12008-02-22 15:15:03 +0100524ifneq (CONFIG_FRAME_WARN,0)
525KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
526endif
527
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100528# Force gcc to behave correct even for buggy distributions
529# Arch Makefiles may override this setting
530KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
531
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200533KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200535KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536endif
537
538ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200539KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200540KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541endif
542
Steven Rostedt606576c2008-10-06 19:06:12 -0400543ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200544KBUILD_CFLAGS += -pg
545endif
546
Sam Ravnborg91341d42008-01-21 21:31:44 +0100547# We trigger additional mismatches with less inlining
548ifdef CONFIG_DEBUG_SECTION_MISMATCH
549KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
550endif
551
Sam Ravnborge8e69932005-04-30 16:51:42 -0700552# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700553NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700554CHECKFLAGS += $(NOSTDINC_FLAGS)
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200557KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200559# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200560KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Sam Ravnborg06c50402007-10-15 22:17:25 +0200562# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100563# But warn user when we do so
564warn-assign = \
565$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
566
567ifneq ($(KCPPFLAGS),)
568 $(call warn-assign,CPPFLAGS)
569 KBUILD_CPPFLAGS += $(KCPPFLAGS)
570endif
571ifneq ($(KAFLAGS),)
572 $(call warn-assign,AFLAGS)
573 KBUILD_AFLAGS += $(KAFLAGS)
574endif
575ifneq ($(KCFLAGS),)
576 $(call warn-assign,CFLAGS)
577 KBUILD_CFLAGS += $(KCFLAGS)
578endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200579
Roland McGrath18991192007-07-19 01:48:40 -0700580# Use --build-id when available.
581LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
582 $(call ld-option, -Wl$(comma)--build-id,))
583LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
584LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200587# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588# set in the environment
589# Also any assignments in arch/$(ARCH)/Makefile take precedence over
590# this default value
591export KBUILD_IMAGE ?= vmlinux
592
593#
594# INSTALL_PATH specifies where to place the updated kernel and system map
595# images. Default is /boot, but you can set it to other values
596export INSTALL_PATH ?= /boot
597
598#
599# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
600# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200601# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602#
603
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100604MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605export MODLIB
606
Jan Beulich9bb48242008-12-16 11:30:08 +0000607strip-symbols := $(srctree)/scripts/strip-symbols \
608 $(wildcard $(srctree)/arch/$(ARCH)/scripts/strip-symbols)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400609
Theodore Ts'oac031f22006-06-21 20:53:09 -0400610#
Jan Beulichad7a9532008-12-16 11:28:14 +0000611# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped while
612# they get installed. If INSTALL_MOD_STRIP is '1', then the default
613# options (see below) will be used. Otherwise, INSTALL_MOD_STRIP will
614# be used as the option(s) to the objcopy command.
Theodore Ts'oac031f22006-06-21 20:53:09 -0400615ifdef INSTALL_MOD_STRIP
616ifeq ($(INSTALL_MOD_STRIP),1)
Jan Beulich9bb48242008-12-16 11:30:08 +0000617mod_strip_cmd = $(OBJCOPY) --strip-debug
618ifeq ($(CONFIG_KALLSYMS_ALL),$(CONFIG_KALLSYMS_STRIP_GENERATED))
619mod_strip_cmd += --wildcard $(addprefix --strip-symbols ,$(strip-symbols))
620endif
Theodore Ts'oac031f22006-06-21 20:53:09 -0400621else
Jan Beulichad7a9532008-12-16 11:28:14 +0000622mod_strip_cmd = $(OBJCOPY) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400623endif # INSTALL_MOD_STRIP=1
624else
Jan Beulichad7a9532008-12-16 11:28:14 +0000625mod_strip_cmd = false
Theodore Ts'oac031f22006-06-21 20:53:09 -0400626endif # INSTALL_MOD_STRIP
627export mod_strip_cmd
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
630ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100631core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
634 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
635 $(net-y) $(net-m) $(libs-y) $(libs-m)))
636
637vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
638 $(init-n) $(init-) \
639 $(core-n) $(core-) $(drivers-n) $(drivers-) \
640 $(net-n) $(net-) $(libs-n) $(libs-))))
641
642init-y := $(patsubst %/, %/built-in.o, $(init-y))
643core-y := $(patsubst %/, %/built-in.o, $(core-y))
644drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
645net-y := $(patsubst %/, %/built-in.o, $(net-y))
646libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
647libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
648libs-y := $(libs-y1) $(libs-y2)
649
650# Build vmlinux
651# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200652# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200654# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655# Ordering when linking is important, and $(vmlinux-init) must be first.
656#
657# vmlinux
658# ^
659# |
660# +-< $(vmlinux-init)
661# | +--< init/version.o + more
662# |
663# +--< $(vmlinux-main)
664# | +--< driver/built-in.o mm/built-in.o + more
665# |
666# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
667#
668# vmlinux version (uname -v) cannot be updated during normal
669# descending-into-subdirs phase since we do not yet know if we need to
670# update vmlinux.
671# Therefore this step is delayed until just before final link of vmlinux -
672# except in the kallsyms case where it is done just before adding the
673# symbols to the kernel.
674#
675# System.map is generated to document addresses of all kernel symbols
676
677vmlinux-init := $(head-y) $(init-y)
678vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
679vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200680vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100681export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683# Rule to link vmlinux - also used during CONFIG_KALLSYMS
684# May be overridden by arch/$(ARCH)/Makefile
685quiet_cmd_vmlinux__ ?= LD $@
686 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
687 -T $(vmlinux-lds) $(vmlinux-init) \
688 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200689 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691# Generate new vmlinux version
692quiet_cmd_vmlinux_version = GEN .version
693 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200694 if [ ! -r .version ]; then \
695 rm -f .version; \
696 echo 1 >.version; \
697 else \
698 mv .version .old_version; \
699 expr 0$$(cat .old_version) + 1 >.version; \
700 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 $(MAKE) $(build)=init
702
703# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200704quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
706
707# Link of vmlinux
708# If CONFIG_KALLSYMS is set .version is already updated
709# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700710# Use + in front of the vmlinux_version rule to silent warning with make -j2
711# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700713 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
715
716 $(call cmd,vmlinux__)
717 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
718
Sam Ravnborg46352812006-08-08 21:41:18 +0200719 $(Q)$(if $($(quiet)cmd_sysmap), \
720 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
721 $(cmd_sysmap) $@ System.map; \
722 if [ $$? -ne 0 ]; then \
723 rm -f $@; \
724 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 fi;
726 $(verify_kallsyms)
727endef
728
729
730ifdef CONFIG_KALLSYMS
731# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
732# It's a three stage process:
733# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
734# empty
735# Running kallsyms on that gives us .tmp_kallsyms1.o with
736# the right size - vmlinux version (uname -v) is updated during this step
737# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
738# but due to the added section, some addresses have shifted.
739# From here, we generate a correct .tmp_kallsyms2.o
740# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
741# o Verify that the System.map from vmlinux matches the map from
742# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
743# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
744# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
745# temporary bypass to allow the kernel to be built while the
746# maintainers work out what went wrong with kallsyms.
747
748ifdef CONFIG_KALLSYMS_EXTRA_PASS
749last_kallsyms := 3
750else
751last_kallsyms := 2
752endif
753
754kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
Jan Beulich9bb48242008-12-16 11:30:08 +0000755kallsyms.h := $(wildcard include/config/kallsyms/*.h) $(wildcard include/config/kallsyms/*/*.h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756
757define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200758 $(Q)$(if $($(quiet)cmd_sysmap), \
759 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200761 $(Q)cmp -s System.map .tmp_System.map || \
762 (echo Inconsistent kallsyms data; \
763 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 rm .tmp_kallsyms* ; /bin/false )
765endef
766
767# Update vmlinux version before link
768# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200769# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770cmd_ksym_ld = $(cmd_vmlinux__)
771define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200772 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 +$(call cmd,vmlinux_version)
774 $(call cmd,vmlinux__)
775 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
776endef
777
778# Generate .S file with all kernel symbols
779quiet_cmd_kallsyms = KSYM $@
Jan Beulich9bb48242008-12-16 11:30:08 +0000780 cmd_kallsyms = { test $* -eq 0 || $(NM) -n $<; } \
781 | $(KALLSYMS) $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) >$@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Jan Beulich9bb48242008-12-16 11:30:08 +0000783quiet_cmd_kstrip = STRIP $@
784 cmd_kstrip = $(OBJCOPY) --wildcard $(addprefix --strip$(if $(CONFIG_RELOCATABLE),-unneeded)-symbols ,$(filter %/scripts/strip-symbols,$^)) $< $@
785
786$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): KBUILD_AFLAGS += -Wa,--strip-local-absolute
787$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 $(call if_changed_dep,as_o_S)
789
Jan Beulich9bb48242008-12-16 11:30:08 +0000790ifeq ($(CONFIG_KALLSYMS_STRIP_GENERATED),y)
791strip-ext := .stripped
792endif
793
794.tmp_kallsyms%.S: .tmp_vmlinux%$(strip-ext) $(KALLSYMS) $(kallsyms.h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 $(call cmd,kallsyms)
796
Jan Beulich9bb48242008-12-16 11:30:08 +0000797# make -jN seems to have problems with intermediate files, see bug #3330.
798.SECONDARY: $(foreach n,1 2 3,.tmp_vmlinux$(n).stripped)
799.tmp_vmlinux%.stripped: .tmp_vmlinux% $(strip-symbols) $(kallsyms.h)
800 $(call cmd,kstrip)
801
802ifneq ($(CONFIG_DEBUG_INFO),y)
803.tmp_vmlinux%: LDFLAGS_vmlinux += -S
804endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Jan Beulich9bb48242008-12-16 11:30:08 +0000806.tmp_vmlinux%: $(vmlinux-lds) $(vmlinux-all) FORCE
807 $(if $(filter 1,$*),$(call if_changed_rule,ksym_ld),$(call if_changed,vmlinux__))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Jan Beulich9bb48242008-12-16 11:30:08 +0000809.tmp_vmlinux0$(strip-ext):
810 $(Q)echo "placeholder" >$@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
Jan Beulich9bb48242008-12-16 11:30:08 +0000812.tmp_vmlinux1: .tmp_kallsyms0.o
813.tmp_vmlinux2: .tmp_kallsyms1.o
814.tmp_vmlinux3: .tmp_kallsyms2.o
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816# Needs to visit scripts/ before $(KALLSYMS) can be used.
817$(KALLSYMS): scripts ;
818
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000819# Generate some data for debugging strange kallsyms problems
820debug_kallsyms: .tmp_map$(last_kallsyms)
821
822.tmp_map%: .tmp_vmlinux% FORCE
823 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
824
825.tmp_map3: .tmp_map2
826
827.tmp_map2: .tmp_map1
828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829endif # ifdef CONFIG_KALLSYMS
830
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200831# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
832# relevant sections renamed as per the linker script.
833quiet_cmd_vmlinux-modpost = LD $@
834 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
835 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200836 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200837define rule_vmlinux-modpost
838 :
839 +$(call cmd,vmlinux-modpost)
840 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
841 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
842endef
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100845vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700846ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100847 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700848endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700849ifdef CONFIG_SAMPLES
850 $(Q)$(MAKE) $(build)=samples
851endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700852ifdef CONFIG_BUILD_DOCSRC
853 $(Q)$(MAKE) $(build)=Documentation
854endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200855 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200857 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
Sam Ravnborg310f8242008-01-21 22:57:09 +0100859# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100860ifdef CONFIG_KALLSYMS
861.tmp_vmlinux1: vmlinux.o
862endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200863
864modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
865vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200866 $(call if_changed_rule,vmlinux-modpost)
867
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868# The actual objects are generated when descending,
869# make sure no implicit rule kicks in
870$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
871
872# Handle descending into subdirectories listed in $(vmlinux-dirs)
873# Preset locale variables to speed up the build process. Limit locale
874# tweaks to this spot to avoid wrong language settings when running
875# make menuconfig etc.
876# Error messages still appears in the original language
877
Paul Smith4f193362006-03-05 17:14:10 -0500878PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200879$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 $(Q)$(MAKE) $(build)=$@
881
Sam Ravnborgcb584552006-01-09 21:20:34 +0100882# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100883#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400884# The KERNELRELEASE value built here is stored in the file
885# include/config/kernel.release, and is used when executing several
886# make targets, such as "make install" or "make modules_install."
887#
888# The eventual kernel release string consists of the following fields,
889# shown in a hierarchical format to show how smaller parts are concatenated
890# to form the larger and final value, with values coming from places like
891# the Makefile, kernel config options, make command line options and/or
892# SCM tag information.
893#
894# $(KERNELVERSION)
895# $(VERSION) eg, 2
896# $(PATCHLEVEL) eg, 6
897# $(SUBLEVEL) eg, 18
898# $(EXTRAVERSION) eg, -rc6
899# $(localver-full)
900# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100901# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400902# $(CONFIG_LOCALVERSION) (from kernel config setting)
903# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
904# ./scripts/setlocalversion (SCM tag, if one exists)
905# $(LOCALVERSION) (from make command line if provided)
906#
907# Note how the final $(localver-auto) string is included *only* if the
908# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
909# moment, only git is supported but other SCMs can edit the script
910# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100911
Oleg Verych76c32952007-02-06 02:18:22 +0100912pattern = ".*/localversion[^~]*"
913string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800914 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100915
Oleg Verych76c32952007-02-06 02:18:22 +0100916localver = $(subst $(space),, $(string) \
917 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200918
Sam Ravnborgcb584552006-01-09 21:20:34 +0100919# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
920# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200921# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100922#
923# Currently, only git is supported.
924# Other SCMs can edit scripts/setlocalversion and add the appropriate
925# checks as needed.
926ifdef CONFIG_LOCALVERSION_AUTO
927 _localver-auto = $(shell $(CONFIG_SHELL) \
928 $(srctree)/scripts/setlocalversion $(srctree))
929 localver-auto = $(LOCALVERSION)$(_localver-auto)
930endif
931
932localver-full = $(localver)$(localver-auto)
933
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700934# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100935kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700936include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100937 $(Q)rm -f $@
938 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100939
940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200942# or the modules are listed in "prepare".
943# A multi level approach is used. prepareN is processed before prepareN-1.
944# archprepare is used in arch Makefiles and when processed asm symlink,
945# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200947# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500948PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200949
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200950# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951# and if so do:
952# 1) Check that make has not been executed in the kernel src $(srctree)
953# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700954prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500956 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700957 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 echo " $(srctree) is not clean, please run 'make mrproper'";\
959 echo " in the '$(srctree)' directory.";\
960 /bin/false; \
961 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200962 $(Q)if [ ! -d include2 ]; then \
963 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200964 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200965 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966endif
967
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200968# prepare2 creates a makefile if using a separate output directory
969prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
Roman Zippel3eb3c742007-01-10 14:45:28 +0100971prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
972 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200973 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200975archprepare: prepare1 scripts_basic
976
977prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200978 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200979 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800982prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200984# Leave this as default for preprocessing vmlinux.lds.S, which is now
985# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
988
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200989# The asm symlink changes when $(ARCH) changes.
990# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200991# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200992define check-symlink
993 set -e; \
994 if [ -L include/asm ]; then \
995 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
996 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200997 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
998 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200999 exit 1; \
1000 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001001 test -e $$asmlink || rm include/asm; \
1002 elif [ -d include/asm ]; then \
1003 echo "ERROR: $@ is a directory but a symlink was expected";\
1004 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001005 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001006endef
1007
1008# We create the target directory of the symlink if it does
1009# not exist so the test in chack-symlink works and we have a
1010# directory for generated filesas used by some architectures.
1011define create-symlink
1012 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001013 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001014 if [ ! -d include/asm-$(SRCARCH) ]; then \
1015 mkdir -p include/asm-$(SRCARCH); \
1016 fi; \
1017 ln -fsn asm-$(SRCARCH) $@; \
1018 fi
1019endef
1020
1021include/asm: FORCE
1022 $(Q)$(check-symlink)
1023 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025# Generate some files
1026# ---------------------------------------------------------------------------
1027
1028# KERNELRELEASE can change from a few different places, meaning version.h
1029# needs to be updated, so this check is forced on all builds
1030
1031uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001032define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001034 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1035 exit 1; \
1036 fi; \
1037 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038endef
1039
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001040define filechk_version.h
1041 (echo \#define LINUX_VERSION_CODE $(shell \
1042 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1043 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1044endef
1045
1046include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 $(call filechk,version.h)
1048
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001049include/linux/utsrelease.h: include/config/kernel.release FORCE
1050 $(call filechk,utsrelease.h)
1051
Vegard Nossum179efcb2008-12-16 12:33:43 +01001052PHONY += headerdep
1053headerdep:
1054 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056# ---------------------------------------------------------------------------
1057
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059depend dep:
1060 @echo '*** Warning: make $@ is unnecessary now.'
1061
1062# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001063# Firmware install
1064INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1065export INSTALL_FW_PATH
1066
1067PHONY += firmware_install
1068firmware_install: FORCE
1069 @mkdir -p $(objtree)/firmware
1070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1071
1072# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001073# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001074
Sam Ravnborge6883b12008-06-05 16:43:46 +02001075#Default location for installed headers
1076export INSTALL_HDR_PATH = $(objtree)/usr
1077
Sam Ravnborge6883b12008-06-05 16:43:46 +02001078hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001079# Find out where the Kbuild file is located to support
1080# arch/$(ARCH)/include/asm
1081hdr-dir = $(strip \
1082 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1083 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1084
1085# If we do an all arch process set dst to asm-$(hdr-arch)
1086hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001087
1088PHONY += __headers
1089__headers: include/linux/version.h scripts_basic FORCE
1090 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001091
1092PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001093headers_install_all:
1094 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001095
David Woodhouse8d730cf2006-06-18 11:58:39 +01001096PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001097headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001098 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1099 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001100 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001101 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001102
Mike Frysinger1f857122007-02-14 00:33:02 -08001103PHONY += headers_check_all
1104headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001105 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001106
David Woodhouse68475352006-06-18 12:02:10 +01001107PHONY += headers_check
1108headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001109 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001110 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001111
David Woodhouse8d730cf2006-06-18 11:58:39 +01001112# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113# Modules
1114
1115ifdef CONFIG_MODULES
1116
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001117# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119all: modules
1120
1121# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001122#
1123# A module can be listed more than once in obj-m resulting in
1124# duplicate lines in modules.order files. Those are removed
1125# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Paul Smith4f193362006-03-05 17:14:10 -05001127PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001129 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001130 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134
1135# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001136PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001137modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138
1139# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001140PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141modules_install: _modinst_ _modinst_post
1142
Paul Smith4f193362006-03-05 17:14:10 -05001143PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001145 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 echo "Warning: you may need to install module-init-tools"; \
1147 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1148 sleep 1; \
1149 fi
1150 @rm -rf $(MODLIB)/kernel
1151 @rm -f $(MODLIB)/source
1152 @mkdir -p $(MODLIB)/kernel
1153 @ln -s $(srctree) $(MODLIB)/source
1154 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1155 rm -f $(MODLIB)/build ; \
1156 ln -s $(objtree) $(MODLIB)/build ; \
1157 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001158 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001159 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001161# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162# boot a modules.dep even before / is mounted read-write. However the
1163# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001164PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001166 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001167 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169else # CONFIG_MODULES
1170
1171# Modules not configured
1172# ---------------------------------------------------------------------------
1173
1174modules modules_install: FORCE
1175 @echo
1176 @echo "The present kernel configuration has modules disabled."
1177 @echo "Type 'make config' and enable loadable module support."
1178 @echo "Then build a kernel with module support enabled."
1179 @echo
1180 @exit 1
1181
1182endif # CONFIG_MODULES
1183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184###
1185# Cleaning is done on three levels.
1186# make clean Delete most generated files
1187# Leave enough to build external modules
1188# make mrproper Delete the current configuration, and all generated files
1189# make distclean Remove editor backup files, patch leftover files and the like
1190
1191# Directories & files removed with 'make clean'
1192CLEAN_DIRS += $(MODVERDIR)
1193CLEAN_FILES += vmlinux System.map \
1194 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1195
1196# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001197MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001198MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001199 include/linux/autoconf.h include/linux/version.h \
1200 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001201 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001202 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
1204# clean - Delete most, but leave enough to build external modules
1205#
1206clean: rm-dirs := $(CLEAN_DIRS)
1207clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001208clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Paul Smith4f193362006-03-05 17:14:10 -05001210PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211$(clean-dirs):
1212 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1213
1214clean: archclean $(clean-dirs)
1215 $(call cmd,rmdirs)
1216 $(call cmd,rmfiles)
1217 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001218 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001219 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001220 -o -name '*.symtypes' -o -name 'modules.order' \
Alexey Dobriyan6b36ab22008-06-07 01:47:09 +04001221 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 -type f -print | xargs rm -f
1223
1224# mrproper - Delete all generated files, including .config
1225#
1226mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1227mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1228mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1229
Paul Smith4f193362006-03-05 17:14:10 -05001230PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231$(mrproper-dirs):
1232 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1233
1234mrproper: clean archmrproper $(mrproper-dirs)
1235 $(call cmd,rmdirs)
1236 $(call cmd,rmfiles)
1237
1238# distclean
1239#
Paul Smith4f193362006-03-05 17:14:10 -05001240PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
1242distclean: mrproper
1243 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001244 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001246 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1248 -type f -print | xargs rm -f
1249
1250
1251# Packaging of the kernel to various formats
1252# ---------------------------------------------------------------------------
1253# rpm target kept for backward compatibility
1254package-dir := $(srctree)/scripts/package
1255
Zach Brown031ecc62006-06-08 22:12:37 -07001256%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001257 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001258rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001259 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261
1262# Brief documentation of the typical targets used
1263# ---------------------------------------------------------------------------
1264
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001265boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001267board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1268board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270help:
1271 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001272 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001273 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001274 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001275 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 @echo ''
1277 @echo 'Configuration targets:'
1278 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1279 @echo ''
1280 @echo 'Other generic targets:'
1281 @echo ' all - Build all targets marked with [*]'
1282 @echo '* vmlinux - Build the bare kernel'
1283 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001284 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001285 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1286 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 @echo ' dir/ - Build all files in dir and below'
1288 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001289 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001290 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 @echo ' tags/TAGS - Generate tags file for editors'
1292 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001293 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001294 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001295 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001296 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001297 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 @echo ' checkstack - Generate a list of stack hogs'
1300 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001301 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001302 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001303 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001304 @echo ' headers_check - Sanity check on exported headers'
1305 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001306 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001308 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 @echo ''
1310 @echo 'Documentation targets:'
1311 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1312 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001313 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001315 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 @echo ''
1317 @$(if $(boards), \
1318 $(foreach b, $(boards), \
1319 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1320 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001321 @$(if $(board-dirs), \
1322 $(foreach b, $(board-dirs), \
1323 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1324 printf " %-16s - Show all of the above\\n" help-boards; \
1325 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
1327 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001328 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001330 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1331 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 @echo ''
1333 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1334 @echo 'For further info see the ./README file'
1335
1336
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001337help-board-dirs := $(addprefix help-,$(board-dirs))
1338
1339help-boards: $(help-board-dirs)
1340
1341boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1342
1343$(help-board-dirs): help-%:
1344 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1345 @$(if $(boards-per-dir), \
1346 $(foreach b, $(boards-per-dir), \
1347 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1348 echo '')
1349
1350
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351# Documentation targets
1352# ---------------------------------------------------------------------------
1353%docs: scripts_basic FORCE
1354 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1355
1356else # KBUILD_EXTMOD
1357
1358###
1359# External module support.
1360# When building external modules the kernel used as basis is considered
1361# read-only, and no consistency checks are made and the make
1362# system is not used on the basis kernel. If updates are required
1363# in the basis kernel ordinary make commands (without M=...) must
1364# be used.
1365#
1366# The following are the only valid targets when building external
1367# modules.
1368# make M=dir clean Delete all automatically generated files
1369# make M=dir modules Make all modules in specified dir
1370# make M=dir Same as 'make M=dir modules'
1371# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001372# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373# Assumes install directory is already created
1374
1375# We are always building modules
1376KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001377PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001379 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380
Paul Smith4f193362006-03-05 17:14:10 -05001381PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382$(objtree)/Module.symvers:
1383 @test -e $(objtree)/Module.symvers || ( \
1384 echo; \
1385 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1386 echo " is missing; modules will have no dependencies and modversions."; \
1387 echo )
1388
1389module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001390PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391$(module-dirs): crmodverdir $(objtree)/Module.symvers
1392 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1393
1394modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001395 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001396 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Paul Smith4f193362006-03-05 17:14:10 -05001398PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001399modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001400
Paul Smith4f193362006-03-05 17:14:10 -05001401install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1402PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001403_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001404 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001405 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
Paul Smith4f193362006-03-05 17:14:10 -05001407PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001408_emodinst_post: _emodinst_
1409 $(call cmd,depmod)
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1412
Paul Smith4f193362006-03-05 17:14:10 -05001413PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414$(clean-dirs):
1415 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1416
1417clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001418clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419clean: $(clean-dirs)
1420 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001421 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001423 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1425 -type f -print | xargs rm -f
1426
1427help:
1428 @echo ' Building external modules.'
1429 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1430 @echo ''
1431 @echo ' modules - default target, build the module(s)'
1432 @echo ' modules_install - install the module'
1433 @echo ' clean - remove generated files in module directory only'
1434 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001435
1436# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001437PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438prepare: ;
1439scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440endif # KBUILD_EXTMOD
1441
1442# Generate tags for editors
1443# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001444quiet_cmd_tags = GEN $@
1445 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Sam Ravnborga680eed2008-12-03 22:24:13 +01001447tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 $(call cmd,tags)
1449
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450# Scripts to check various things for consistency
1451# ---------------------------------------------------------------------------
1452
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453includecheck:
1454 find * $(RCS_FIND_IGNORE) \
1455 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001456 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
1458versioncheck:
1459 find * $(RCS_FIND_IGNORE) \
1460 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001461 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463namespacecheck:
1464 $(PERL) $(srctree)/scripts/namespace.pl
1465
Adrian Bunk295ac052007-08-24 23:04:56 +02001466export_report:
1467 $(PERL) $(srctree)/scripts/export_report.pl
1468
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469endif #ifeq ($(config-targets),1)
1470endif #ifeq ($(mixed-targets),1)
1471
Roman Zippelc30a02e2006-06-08 22:12:50 -07001472PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001473
Jeff Dike011e3a92006-12-13 00:34:12 -08001474# UML needs a little special treatment here. It wants to use the host
1475# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1476# else wants $(ARCH), including people doing cross-builds, which means
1477# that $(SUBARCH) doesn't work here.
1478ifeq ($(ARCH), um)
1479CHECKSTACK_ARCH := $(SUBARCH)
1480else
1481CHECKSTACK_ARCH := $(ARCH)
1482endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483checkstack:
1484 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001485 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
1487kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001488 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1489 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001490kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001491 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Sam Ravnborg06300b22006-01-25 07:13:18 +01001493# Single targets
1494# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001495# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001496# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001497# - build with separate output dir 'make O=...'
1498# - external modules
1499#
1500# target-dir => where to store outputfile
1501# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001502
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001504 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001505 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001506else
1507 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001508 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1509 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001510endif
1511
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001512%.s: %.c prepare scripts FORCE
1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1514%.i: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516%.o: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518%.lst: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520%.s: %.S prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522%.o: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001524%.symtypes: %.c prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001526
1527# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001528/: prepare scripts FORCE
1529 $(cmd_crmodverdir)
1530 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1531 $(build)=$(build-dir)
1532%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001533 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001534 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001535 $(build)=$(build-dir)
1536%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001537 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001538 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001539 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001540 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542# FIXME Should go into a make.lib or something
1543# ===========================================================================
1544
1545quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1546 cmd_rmdirs = rm -rf $(rm-dirs)
1547
1548quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1549 cmd_rmfiles = rm -f $(rm-files)
1550
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001551# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001552quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1553 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001554 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001555 $(DEPMOD) -ae -F System.map \
1556 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1557 $(KERNELRELEASE); \
1558 fi
1559
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001560# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001561# clean it up only when building all modules
1562cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1563 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Sam Ravnborg222d3942007-10-15 21:59:31 +02001565a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001566 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001567 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569quiet_cmd_as_o_S = AS $@
1570cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1571
1572# read all saved command lines
1573
1574targets := $(wildcard $(sort $(targets)))
1575cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1576
1577ifneq ($(cmd_files),)
1578 $(cmd_files): ; # Do not try to update included dependency files
1579 include $(cmd_files)
1580endif
1581
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1583# Usage:
1584# $(Q)$(MAKE) $(clean)=dir
1585clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587endif # skip-makefile
1588
Paul Smith4f193362006-03-05 17:14:10 -05001589PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001591
Paul Smith4f193362006-03-05 17:14:10 -05001592# Declare the contents of the .PHONY variable as phony. We keep that
1593# information in a variable se we can use it in if_changed and friends.
1594.PHONY: $(PHONY)