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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds2ddcca32008-05-03 11:59:44 -07003SUBLEVEL = 26
Linus Torvaldsbce7f792008-07-13 14:51:29 -07004EXTRAVERSION =
Linus Torvalds5dd34572008-06-12 14:22:24 -07005NAME = Rotary Wombat
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
209hdr-arch := $(SRCARCH)
210
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700211KCONFIG_CONFIG ?= .config
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213# SHELL used by kbuild
214CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
215 else if [ -x /bin/bash ]; then echo /bin/bash; \
216 else echo sh; fi ; fi)
217
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200218HOSTCC = gcc
219HOSTCXX = g++
220HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
221HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200223# Decide whether to build built-in, modular, or both.
224# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226KBUILD_MODULES :=
227KBUILD_BUILTIN := 1
228
229# If we have only "make modules", don't compile built-in objects.
230# When we're building modules with modversions, we need to consider
231# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200232# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234ifeq ($(MAKECMDGOALS),modules)
235 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
236endif
237
238# If we have "make <whatever> modules", compile modules
239# in addition to whatever we do anyway.
240# Just "make" or "make all" shall build modules as well
241
242ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
243 KBUILD_MODULES := 1
244endif
245
246ifeq ($(MAKECMDGOALS),)
247 KBUILD_MODULES := 1
248endif
249
Sam Ravnborge579d352005-07-27 08:10:10 +0200250export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
252
253# Beautify output
254# ---------------------------------------------------------------------------
255#
256# Normally, we echo the whole command before executing it. By making
257# that echo $($(quiet)$(cmd)), we now have the possibility to set
258# $(quiet) to choose other forms of output instead, e.g.
259#
260# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
261# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
262#
263# If $(quiet) is empty, the whole command will be printed.
264# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200265# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266# the variable $(silent_cmd_cc_o_c) doesn't exist.
267#
Adrian Bunka58a4142006-01-10 00:08:17 +0100268# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269# for commands that shall be hidden in non-verbose mode.
270#
271# $(Q)ln $@ :<
272#
273# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
274# If KBUILD_VERBOSE equals 1 then the above command is displayed.
275
276ifeq ($(KBUILD_VERBOSE),1)
277 quiet =
278 Q =
279else
280 quiet=quiet_
281 Q = @
282endif
283
284# If the user is running make -s (silent mode), suppress echoing of
285# commands
286
287ifneq ($(findstring s,$(MAKEFLAGS)),)
288 quiet=silent_
289endif
290
291export quiet Q KBUILD_VERBOSE
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294# Look for make include files relative to root of kernel src
295MAKEFLAGS += --include-dir=$(srctree)
296
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100297# We need some generic definitions (do not try to remake the file).
298$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800299include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301# Make variables (CC, etc...)
302
303AS = $(CROSS_COMPILE)as
304LD = $(CROSS_COMPILE)ld
305CC = $(CROSS_COMPILE)gcc
306CPP = $(CC) -E
307AR = $(CROSS_COMPILE)ar
308NM = $(CROSS_COMPILE)nm
309STRIP = $(CROSS_COMPILE)strip
310OBJCOPY = $(CROSS_COMPILE)objcopy
311OBJDUMP = $(CROSS_COMPILE)objdump
312AWK = awk
313GENKSYMS = scripts/genksyms/genksyms
314DEPMOD = /sbin/depmod
315KALLSYMS = scripts/kallsyms
316PERL = perl
317CHECK = sparse
318
Al Viroaf4ca452005-10-21 02:55:38 -0400319CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320MODFLAGS = -DMODULE
321CFLAGS_MODULE = $(MODFLAGS)
322AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700323LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324CFLAGS_KERNEL =
325AFLAGS_KERNEL =
326
327
328# Use LINUXINCLUDE when you must reference the include/ directory.
329# Needed to be compatible with the O= option
330LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100331 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800332 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Sam Ravnborg06c50402007-10-15 22:17:25 +0200334KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200336KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700337 -fno-strict-aliasing -fno-common \
338 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200339KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700341# Read KERNELRELEASE from include/config/kernel.release (if it exists)
342KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100343KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100344
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200345export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100346export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200347export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
348export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Sam Ravnborg06c50402007-10-15 22:17:25 +0200350export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200351export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200352export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354# When compiling out-of-tree modules, put MODVERDIR in the module
355# tree rather than in the kernel tree. The kernel tree might
356# even be read-only.
357export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359# Files to ignore in find ... statements
360
Trond Myklebust406119f2005-10-27 14:46:53 -0400361RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
362export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364# ===========================================================================
365# Rules shared between *config targets and build targets
366
367# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500368PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369scripts_basic:
370 $(Q)$(MAKE) $(build)=scripts/basic
371
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200372# To avoid any implicit rule to kick in, define an empty command.
373scripts/basic/%: scripts_basic ;
374
Paul Smith4f193362006-03-05 17:14:10 -0500375PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200376# outputmakefile generates a Makefile in the output directory, if using a
377# separate output directory. This allows convenient use of make in the
378# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200380ifneq ($(KBUILD_SRC),)
381 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
382 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
383endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385# To make sure we do not include .config for any of the *config targets
386# catch them early, and hand them over to scripts/kconfig/Makefile
387# It is allowed to specify more targets when calling make, including
388# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200389# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390# Detect when mixed targets is specified, and make a second invocation
391# of make so .config is not included in this case either (for *config).
392
Roman Zippel3eb3c742007-01-10 14:45:28 +0100393no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700394 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100395 include/linux/version.h headers_% \
396 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398config-targets := 0
399mixed-targets := 0
400dot-config := 1
401
402ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
403 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
404 dot-config := 0
405 endif
406endif
407
408ifeq ($(KBUILD_EXTMOD),)
409 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
410 config-targets := 1
411 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
412 mixed-targets := 1
413 endif
414 endif
415endif
416
417ifeq ($(mixed-targets),1)
418# ===========================================================================
419# We're called with mixed targets (*config and build targets).
420# Handle them one by one.
421
422%:: FORCE
423 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
424
425else
426ifeq ($(config-targets),1)
427# ===========================================================================
428# *config targets only - make sure prerequisites are updated, and descend
429# in scripts/kconfig to make the *config target
430
431# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
432# KBUILD_DEFCONFIG may point out an alternative default configuration
433# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200434include $(srctree)/arch/$(SRCARCH)/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435export KBUILD_DEFCONFIG
436
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200437config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700438 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 $(Q)$(MAKE) $(build)=scripts/kconfig $@
440
441else
442# ===========================================================================
443# Build targets only - this includes vmlinux, arch specific targets, clean
444# targets and others. In general all targets except *config targets.
445
446ifeq ($(KBUILD_EXTMOD),)
447# Additional helpers built in scripts/
448# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200449# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500450PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700451scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 $(Q)$(MAKE) $(build)=$(@)
453
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454# Objects we will link into vmlinux / subdirs we need to visit
455init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100456drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457net-y := net/
458libs-y := lib/
459core-y := usr/
460endif # KBUILD_EXTMOD
461
462ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200463# Read in config
464-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200466ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467# Read in dependencies to all Kconfig* files, make sure to run
468# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700469-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700472$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Roman Zippelc955cca2006-06-08 22:12:39 -0700474# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100475# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200476# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100477# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700478include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
480else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200481# external modules needs include/linux/autoconf.h and include/config/auto.conf
482# but do not care if they are up-to-date. Use auto.conf to trigger the test
483PHONY += include/config/auto.conf
484
485include/config/auto.conf:
486 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
487 echo; \
488 echo " ERROR: Kernel configuration is invalid."; \
489 echo " include/linux/autoconf.h or $@ are missing."; \
490 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
491 echo; \
492 /bin/false)
493
494endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496else
497# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700498include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200499endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
501# The all: target is the default when no target is given on the
502# command line.
503# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200504# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505all: vmlinux
506
507ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200508KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200510KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511endif
512
Ralf Baechlebef5b542008-07-16 13:02:24 +0100513include $(srctree)/arch/$(SRCARCH)/Makefile
514
Andi Kleen35bb5b12008-02-22 15:15:03 +0100515ifneq (CONFIG_FRAME_WARN,0)
516KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
517endif
518
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100519# Force gcc to behave correct even for buggy distributions
520# Arch Makefiles may override this setting
521KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200524KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200526KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527endif
528
529ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200530KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200531KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532endif
533
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200534ifdef CONFIG_FTRACE
535KBUILD_CFLAGS += -pg
536endif
537
Sam Ravnborg91341d42008-01-21 21:31:44 +0100538# We trigger additional mismatches with less inlining
539ifdef CONFIG_DEBUG_SECTION_MISMATCH
540KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
541endif
542
Sam Ravnborge8e69932005-04-30 16:51:42 -0700543# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700544NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700545CHECKFLAGS += $(NOSTDINC_FLAGS)
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200548KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200550# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200551KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Sam Ravnborg06c50402007-10-15 22:17:25 +0200553# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100554# But warn user when we do so
555warn-assign = \
556$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
557
558ifneq ($(KCPPFLAGS),)
559 $(call warn-assign,CPPFLAGS)
560 KBUILD_CPPFLAGS += $(KCPPFLAGS)
561endif
562ifneq ($(KAFLAGS),)
563 $(call warn-assign,AFLAGS)
564 KBUILD_AFLAGS += $(KAFLAGS)
565endif
566ifneq ($(KCFLAGS),)
567 $(call warn-assign,CFLAGS)
568 KBUILD_CFLAGS += $(KCFLAGS)
569endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200570
Roland McGrath18991192007-07-19 01:48:40 -0700571# Use --build-id when available.
572LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
573 $(call ld-option, -Wl$(comma)--build-id,))
574LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
575LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200578# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579# set in the environment
580# Also any assignments in arch/$(ARCH)/Makefile take precedence over
581# this default value
582export KBUILD_IMAGE ?= vmlinux
583
584#
585# INSTALL_PATH specifies where to place the updated kernel and system map
586# images. Default is /boot, but you can set it to other values
587export INSTALL_PATH ?= /boot
588
589#
590# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
591# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200592# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593#
594
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100595MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596export MODLIB
597
Theodore Ts'oac031f22006-06-21 20:53:09 -0400598#
599# INSTALL_MOD_STRIP, if defined, will cause modules to be
600# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
601# the default option --strip-debug will be used. Otherwise,
602# INSTALL_MOD_STRIP will used as the options to the strip command.
603
604ifdef INSTALL_MOD_STRIP
605ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200606mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400607else
608mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
609endif # INSTALL_MOD_STRIP=1
610else
611mod_strip_cmd = true
612endif # INSTALL_MOD_STRIP
613export mod_strip_cmd
614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100617core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
620 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
621 $(net-y) $(net-m) $(libs-y) $(libs-m)))
622
623vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
624 $(init-n) $(init-) \
625 $(core-n) $(core-) $(drivers-n) $(drivers-) \
626 $(net-n) $(net-) $(libs-n) $(libs-))))
627
628init-y := $(patsubst %/, %/built-in.o, $(init-y))
629core-y := $(patsubst %/, %/built-in.o, $(core-y))
630drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
631net-y := $(patsubst %/, %/built-in.o, $(net-y))
632libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
633libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
634libs-y := $(libs-y1) $(libs-y2)
635
636# Build vmlinux
637# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200638# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200640# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641# Ordering when linking is important, and $(vmlinux-init) must be first.
642#
643# vmlinux
644# ^
645# |
646# +-< $(vmlinux-init)
647# | +--< init/version.o + more
648# |
649# +--< $(vmlinux-main)
650# | +--< driver/built-in.o mm/built-in.o + more
651# |
652# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
653#
654# vmlinux version (uname -v) cannot be updated during normal
655# descending-into-subdirs phase since we do not yet know if we need to
656# update vmlinux.
657# Therefore this step is delayed until just before final link of vmlinux -
658# except in the kallsyms case where it is done just before adding the
659# symbols to the kernel.
660#
661# System.map is generated to document addresses of all kernel symbols
662
663vmlinux-init := $(head-y) $(init-y)
664vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
665vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200666vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100667export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669# Rule to link vmlinux - also used during CONFIG_KALLSYMS
670# May be overridden by arch/$(ARCH)/Makefile
671quiet_cmd_vmlinux__ ?= LD $@
672 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
673 -T $(vmlinux-lds) $(vmlinux-init) \
674 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200675 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
677# Generate new vmlinux version
678quiet_cmd_vmlinux_version = GEN .version
679 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200680 if [ ! -r .version ]; then \
681 rm -f .version; \
682 echo 1 >.version; \
683 else \
684 mv .version .old_version; \
685 expr 0$$(cat .old_version) + 1 >.version; \
686 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 $(MAKE) $(build)=init
688
689# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200690quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
692
693# Link of vmlinux
694# If CONFIG_KALLSYMS is set .version is already updated
695# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700696# Use + in front of the vmlinux_version rule to silent warning with make -j2
697# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700699 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
701
702 $(call cmd,vmlinux__)
703 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
704
Sam Ravnborg46352812006-08-08 21:41:18 +0200705 $(Q)$(if $($(quiet)cmd_sysmap), \
706 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
707 $(cmd_sysmap) $@ System.map; \
708 if [ $$? -ne 0 ]; then \
709 rm -f $@; \
710 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 fi;
712 $(verify_kallsyms)
713endef
714
715
716ifdef CONFIG_KALLSYMS
717# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
718# It's a three stage process:
719# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
720# empty
721# Running kallsyms on that gives us .tmp_kallsyms1.o with
722# the right size - vmlinux version (uname -v) is updated during this step
723# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
724# but due to the added section, some addresses have shifted.
725# From here, we generate a correct .tmp_kallsyms2.o
726# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
727# o Verify that the System.map from vmlinux matches the map from
728# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
729# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
730# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
731# temporary bypass to allow the kernel to be built while the
732# maintainers work out what went wrong with kallsyms.
733
734ifdef CONFIG_KALLSYMS_EXTRA_PASS
735last_kallsyms := 3
736else
737last_kallsyms := 2
738endif
739
740kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
741
742define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200743 $(Q)$(if $($(quiet)cmd_sysmap), \
744 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200746 $(Q)cmp -s System.map .tmp_System.map || \
747 (echo Inconsistent kallsyms data; \
748 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 rm .tmp_kallsyms* ; /bin/false )
750endef
751
752# Update vmlinux version before link
753# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200754# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755cmd_ksym_ld = $(cmd_vmlinux__)
756define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200757 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 +$(call cmd,vmlinux_version)
759 $(call cmd,vmlinux__)
760 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
761endef
762
763# Generate .S file with all kernel symbols
764quiet_cmd_kallsyms = KSYM $@
765 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
766 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
767
768.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
769 $(call if_changed_dep,as_o_S)
770
771.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
772 $(call cmd,kallsyms)
773
774# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
775.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
776 $(call if_changed_rule,ksym_ld)
777
778.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
779 $(call if_changed,vmlinux__)
780
781.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
782 $(call if_changed,vmlinux__)
783
784# Needs to visit scripts/ before $(KALLSYMS) can be used.
785$(KALLSYMS): scripts ;
786
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000787# Generate some data for debugging strange kallsyms problems
788debug_kallsyms: .tmp_map$(last_kallsyms)
789
790.tmp_map%: .tmp_vmlinux% FORCE
791 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
792
793.tmp_map3: .tmp_map2
794
795.tmp_map2: .tmp_map1
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797endif # ifdef CONFIG_KALLSYMS
798
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200799# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
800# relevant sections renamed as per the linker script.
801quiet_cmd_vmlinux-modpost = LD $@
802 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
803 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200804 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200805define rule_vmlinux-modpost
806 :
807 +$(call cmd,vmlinux-modpost)
808 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
809 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
810endef
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100813vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700814ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100815 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700816endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700817ifdef CONFIG_SAMPLES
818 $(Q)$(MAKE) $(build)=samples
819endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200820 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200822 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
Sam Ravnborg310f8242008-01-21 22:57:09 +0100824# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100825ifdef CONFIG_KALLSYMS
826.tmp_vmlinux1: vmlinux.o
827endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200828
829modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
830vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200831 $(call if_changed_rule,vmlinux-modpost)
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833# The actual objects are generated when descending,
834# make sure no implicit rule kicks in
835$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
836
837# Handle descending into subdirectories listed in $(vmlinux-dirs)
838# Preset locale variables to speed up the build process. Limit locale
839# tweaks to this spot to avoid wrong language settings when running
840# make menuconfig etc.
841# Error messages still appears in the original language
842
Paul Smith4f193362006-03-05 17:14:10 -0500843PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200844$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 $(Q)$(MAKE) $(build)=$@
846
Sam Ravnborgcb584552006-01-09 21:20:34 +0100847# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100848#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400849# The KERNELRELEASE value built here is stored in the file
850# include/config/kernel.release, and is used when executing several
851# make targets, such as "make install" or "make modules_install."
852#
853# The eventual kernel release string consists of the following fields,
854# shown in a hierarchical format to show how smaller parts are concatenated
855# to form the larger and final value, with values coming from places like
856# the Makefile, kernel config options, make command line options and/or
857# SCM tag information.
858#
859# $(KERNELVERSION)
860# $(VERSION) eg, 2
861# $(PATCHLEVEL) eg, 6
862# $(SUBLEVEL) eg, 18
863# $(EXTRAVERSION) eg, -rc6
864# $(localver-full)
865# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100866# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400867# $(CONFIG_LOCALVERSION) (from kernel config setting)
868# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
869# ./scripts/setlocalversion (SCM tag, if one exists)
870# $(LOCALVERSION) (from make command line if provided)
871#
872# Note how the final $(localver-auto) string is included *only* if the
873# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
874# moment, only git is supported but other SCMs can edit the script
875# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100876
Oleg Verych76c32952007-02-06 02:18:22 +0100877pattern = ".*/localversion[^~]*"
878string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800879 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100880
Oleg Verych76c32952007-02-06 02:18:22 +0100881localver = $(subst $(space),, $(string) \
882 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200883
Sam Ravnborgcb584552006-01-09 21:20:34 +0100884# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
885# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200886# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100887#
888# Currently, only git is supported.
889# Other SCMs can edit scripts/setlocalversion and add the appropriate
890# checks as needed.
891ifdef CONFIG_LOCALVERSION_AUTO
892 _localver-auto = $(shell $(CONFIG_SHELL) \
893 $(srctree)/scripts/setlocalversion $(srctree))
894 localver-auto = $(LOCALVERSION)$(_localver-auto)
895endif
896
897localver-full = $(localver)$(localver-auto)
898
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700899# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100900kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700901include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100902 $(Q)rm -f $@
903 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100904
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200907# or the modules are listed in "prepare".
908# A multi level approach is used. prepareN is processed before prepareN-1.
909# archprepare is used in arch Makefiles and when processed asm symlink,
910# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200912# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500913PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200914
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200915# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916# and if so do:
917# 1) Check that make has not been executed in the kernel src $(srctree)
918# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700919prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920ifneq ($(KBUILD_SRC),)
921 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700922 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 echo " $(srctree) is not clean, please run 'make mrproper'";\
924 echo " in the '$(srctree)' directory.";\
925 /bin/false; \
926 fi;
927 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200928 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929endif
930
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200931# prepare2 creates a makefile if using a separate output directory
932prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
Roman Zippel3eb3c742007-01-10 14:45:28 +0100934prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
935 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200936 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200938archprepare: prepare1 scripts_basic
939
940prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200941 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200942 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800945prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200947# Leave this as default for preprocessing vmlinux.lds.S, which is now
948# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949
950export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
951
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200952# The asm symlink changes when $(ARCH) changes.
953# Detect this and ask user to run make mrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200955include/asm: FORCE
956 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
957 if [ -L include/asm ]; then \
958 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
959 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
960 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
961 exit 1; \
962 fi; \
963 else \
964 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
965 if [ ! -d include ]; then \
966 mkdir -p include; \
967 fi; \
968 ln -fsn asm-$(SRCARCH) $@; \
969 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971# Generate some files
972# ---------------------------------------------------------------------------
973
974# KERNELRELEASE can change from a few different places, meaning version.h
975# needs to be updated, so this check is forced on all builds
976
977uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200978define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200980 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
981 exit 1; \
982 fi; \
983 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984endef
985
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200986define filechk_version.h
987 (echo \#define LINUX_VERSION_CODE $(shell \
988 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
989 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
990endef
991
992include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 $(call filechk,version.h)
994
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200995include/linux/utsrelease.h: include/config/kernel.release FORCE
996 $(call filechk,utsrelease.h)
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998# ---------------------------------------------------------------------------
999
Paul Smith4f193362006-03-05 17:14:10 -05001000PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001depend dep:
1002 @echo '*** Warning: make $@ is unnecessary now.'
1003
1004# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001005# Firmware install
1006INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1007export INSTALL_FW_PATH
1008
1009PHONY += firmware_install
1010firmware_install: FORCE
1011 @mkdir -p $(objtree)/firmware
1012 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1013
1014# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001015# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001016
Sam Ravnborge6883b12008-06-05 16:43:46 +02001017#Default location for installed headers
1018export INSTALL_HDR_PATH = $(objtree)/usr
1019
Sam Ravnborge6883b12008-06-05 16:43:46 +02001020hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001021# Find out where the Kbuild file is located to support
1022# arch/$(ARCH)/include/asm
1023hdr-dir = $(strip \
1024 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1025 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1026
1027# If we do an all arch process set dst to asm-$(hdr-arch)
1028hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001029
1030PHONY += __headers
1031__headers: include/linux/version.h scripts_basic FORCE
1032 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001033
1034PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001035headers_install_all:
1036 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001037
David Woodhouse8d730cf2006-06-18 11:58:39 +01001038PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001039headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001040 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1041 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001042 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001043 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001044
Mike Frysinger1f857122007-02-14 00:33:02 -08001045PHONY += headers_check_all
1046headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001047 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001048
David Woodhouse68475352006-06-18 12:02:10 +01001049PHONY += headers_check
1050headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001051 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001052 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001053
David Woodhouse8d730cf2006-06-18 11:58:39 +01001054# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055# Modules
1056
1057ifdef CONFIG_MODULES
1058
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001059# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
1061all: modules
1062
1063# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001064#
1065# A module can be listed more than once in obj-m resulting in
1066# duplicate lines in modules.order files. Those are removed
1067# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Paul Smith4f193362006-03-05 17:14:10 -05001069PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001071 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001073 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075
1076# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001077PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001078modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
1080# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001081PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082modules_install: _modinst_ _modinst_post
1083
Paul Smith4f193362006-03-05 17:14:10 -05001084PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001086 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 echo "Warning: you may need to install module-init-tools"; \
1088 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1089 sleep 1; \
1090 fi
1091 @rm -rf $(MODLIB)/kernel
1092 @rm -f $(MODLIB)/source
1093 @mkdir -p $(MODLIB)/kernel
1094 @ln -s $(srctree) $(MODLIB)/source
1095 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1096 rm -f $(MODLIB)/build ; \
1097 ln -s $(objtree) $(MODLIB)/build ; \
1098 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001099 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001100 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001102# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103# boot a modules.dep even before / is mounted read-write. However the
1104# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001105PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001107 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001108 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
1110else # CONFIG_MODULES
1111
1112# Modules not configured
1113# ---------------------------------------------------------------------------
1114
1115modules modules_install: FORCE
1116 @echo
1117 @echo "The present kernel configuration has modules disabled."
1118 @echo "Type 'make config' and enable loadable module support."
1119 @echo "Then build a kernel with module support enabled."
1120 @echo
1121 @exit 1
1122
1123endif # CONFIG_MODULES
1124
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125###
1126# Cleaning is done on three levels.
1127# make clean Delete most generated files
1128# Leave enough to build external modules
1129# make mrproper Delete the current configuration, and all generated files
1130# make distclean Remove editor backup files, patch leftover files and the like
1131
1132# Directories & files removed with 'make clean'
1133CLEAN_DIRS += $(MODVERDIR)
1134CLEAN_FILES += vmlinux System.map \
1135 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1136
1137# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001138MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001139MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001140 include/linux/autoconf.h include/linux/version.h \
1141 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001142 include/linux/bounds.h include/asm*/asm-offsets.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001143 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144
1145# clean - Delete most, but leave enough to build external modules
1146#
1147clean: rm-dirs := $(CLEAN_DIRS)
1148clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001149clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
Paul Smith4f193362006-03-05 17:14:10 -05001151PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152$(clean-dirs):
1153 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1154
1155clean: archclean $(clean-dirs)
1156 $(call cmd,rmdirs)
1157 $(call cmd,rmfiles)
1158 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001159 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001160 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001161 -o -name '*.symtypes' -o -name 'modules.order' \
Alexey Dobriyan6b36ab22008-06-07 01:47:09 +04001162 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 -type f -print | xargs rm -f
1164
1165# mrproper - Delete all generated files, including .config
1166#
1167mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1168mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1169mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1170
Paul Smith4f193362006-03-05 17:14:10 -05001171PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172$(mrproper-dirs):
1173 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1174
1175mrproper: clean archmrproper $(mrproper-dirs)
1176 $(call cmd,rmdirs)
1177 $(call cmd,rmfiles)
1178
1179# distclean
1180#
Paul Smith4f193362006-03-05 17:14:10 -05001181PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182
1183distclean: mrproper
1184 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001185 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001187 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1189 -type f -print | xargs rm -f
1190
1191
1192# Packaging of the kernel to various formats
1193# ---------------------------------------------------------------------------
1194# rpm target kept for backward compatibility
1195package-dir := $(srctree)/scripts/package
1196
Zach Brown031ecc62006-06-08 22:12:37 -07001197%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001198 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001199rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001200 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
1202
1203# Brief documentation of the typical targets used
1204# ---------------------------------------------------------------------------
1205
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001206boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001208board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1209board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211help:
1212 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001213 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001214 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001215 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001216 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 @echo ''
1218 @echo 'Configuration targets:'
1219 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1220 @echo ''
1221 @echo 'Other generic targets:'
1222 @echo ' all - Build all targets marked with [*]'
1223 @echo '* vmlinux - Build the bare kernel'
1224 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001225 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001226 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1227 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 @echo ' dir/ - Build all files in dir and below'
1229 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001230 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001231 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 @echo ' tags/TAGS - Generate tags file for editors'
1233 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001234 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001235 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001236 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001237 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001238 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo ' checkstack - Generate a list of stack hogs'
1241 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001242 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001243 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001244 @echo ' export_report - List the usages of all exported symbols'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001245 @echo ' headers_check - Sanity check on exported headers'; \
1246 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001248 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 @echo ''
1250 @echo 'Documentation targets:'
1251 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1252 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001253 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001255 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 @echo ''
1257 @$(if $(boards), \
1258 $(foreach b, $(boards), \
1259 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1260 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001261 @$(if $(board-dirs), \
1262 $(foreach b, $(board-dirs), \
1263 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1264 printf " %-16s - Show all of the above\\n" help-boards; \
1265 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
1267 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001268 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001270 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1271 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 @echo ''
1273 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1274 @echo 'For further info see the ./README file'
1275
1276
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001277help-board-dirs := $(addprefix help-,$(board-dirs))
1278
1279help-boards: $(help-board-dirs)
1280
1281boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1282
1283$(help-board-dirs): help-%:
1284 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1285 @$(if $(boards-per-dir), \
1286 $(foreach b, $(boards-per-dir), \
1287 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1288 echo '')
1289
1290
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291# Documentation targets
1292# ---------------------------------------------------------------------------
1293%docs: scripts_basic FORCE
1294 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1295
1296else # KBUILD_EXTMOD
1297
1298###
1299# External module support.
1300# When building external modules the kernel used as basis is considered
1301# read-only, and no consistency checks are made and the make
1302# system is not used on the basis kernel. If updates are required
1303# in the basis kernel ordinary make commands (without M=...) must
1304# be used.
1305#
1306# The following are the only valid targets when building external
1307# modules.
1308# make M=dir clean Delete all automatically generated files
1309# make M=dir modules Make all modules in specified dir
1310# make M=dir Same as 'make M=dir modules'
1311# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001312# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313# Assumes install directory is already created
1314
1315# We are always building modules
1316KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001317PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001319 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
Paul Smith4f193362006-03-05 17:14:10 -05001321PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322$(objtree)/Module.symvers:
1323 @test -e $(objtree)/Module.symvers || ( \
1324 echo; \
1325 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1326 echo " is missing; modules will have no dependencies and modversions."; \
1327 echo )
1328
1329module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001330PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331$(module-dirs): crmodverdir $(objtree)/Module.symvers
1332 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1333
1334modules: $(module-dirs)
1335 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001336 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
Paul Smith4f193362006-03-05 17:14:10 -05001338PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001339modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001340
Paul Smith4f193362006-03-05 17:14:10 -05001341install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1342PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001343_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001344 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001345 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Paul Smith4f193362006-03-05 17:14:10 -05001347PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001348_emodinst_post: _emodinst_
1349 $(call cmd,depmod)
1350
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1352
Paul Smith4f193362006-03-05 17:14:10 -05001353PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354$(clean-dirs):
1355 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1356
1357clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001358clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359clean: $(clean-dirs)
1360 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001361 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001363 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1365 -type f -print | xargs rm -f
1366
1367help:
1368 @echo ' Building external modules.'
1369 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1370 @echo ''
1371 @echo ' modules - default target, build the module(s)'
1372 @echo ' modules_install - install the module'
1373 @echo ' clean - remove generated files in module directory only'
1374 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001375
1376# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001377PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001378prepare: ;
1379scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380endif # KBUILD_EXTMOD
1381
1382# Generate tags for editors
1383# ---------------------------------------------------------------------------
1384
1385#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1386#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1387#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1388
George Anzingerf182ae62005-07-07 17:56:06 -07001389ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390__srctree =
1391else
1392__srctree = $(srctree)/
1393endif
1394
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001395ifeq ($(ALLSOURCE_ARCHS),)
1396ifeq ($(ARCH),um)
1397ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1398else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001399ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001400endif
1401else
Linus Nilssond384e352008-01-20 17:10:01 +01001402#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001403ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1404endif
1405
Thomas Gleixnerd0974b12007-11-15 07:11:12 +01001406ALLSOURCE_ARCHS := $(SRCARCH)
Ian Campbella0674e82005-06-23 11:25:54 +01001407
Masatake YAMATOe838db62006-06-22 12:21:20 +09001408define find-sources
Yinghai Luf8bea582007-10-16 00:28:06 -07001409 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1410 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001411 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001412 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001414 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 find $(__srctree)include $(RCS_FIND_IGNORE) \
1416 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001417 -o -name $1 -print; \
Yinghai Luf8bea582007-10-16 00:28:06 -07001418 for arch in $(ALLINCLUDE_ARCHS) ; do \
Sam Ravnborga53ce092008-06-22 21:41:13 +02001419 test -e $(__srctree)include/asm-$${arch} && \
1420 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1421 -name $1 -print; \
1422 test -e $(__srctree)arch/$${arch}/include/asm && \
1423 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001424 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001425 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001427 -name $1 -print; \
1428 find $(__srctree) $(RCS_FIND_IGNORE) \
Yinghai Lu37ab7a22007-10-17 16:43:39 -07001429 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001430 -name $1 -print; \
1431 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001432endef
1433
1434define all-sources
1435 $(call find-sources,'*.[chS]')
1436endef
1437define all-kconfigs
1438 $(call find-sources,'Kconfig*')
1439endef
1440define all-defconfigs
1441 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442endef
1443
Aron Griffisda7c0402006-09-21 00:27:02 -04001444define xtags
1445 if $1 --version 2>&1 | grep -iq exuberant; then \
1446 $(all-sources) | xargs $1 -a \
1447 -I __initdata,__exitdata,__acquires,__releases \
Uwe Kleine-König2c812102008-01-08 15:16:24 +01001448 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
Aron Griffisda7c0402006-09-21 00:27:02 -04001449 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001450 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001451 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001452 $(all-kconfigs) | xargs $1 -a \
1453 --langdef=kconfig \
1454 --language-force=kconfig \
Alexey Dobriyan80ff2622008-02-22 15:02:33 +03001455 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
David Gibson18e39912006-10-04 02:15:32 -07001456 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001457 --langdef=dotconfig \
1458 --language-force=dotconfig \
1459 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1460 elif $1 --version 2>&1 | grep -iq emacs; then \
1461 $(all-sources) | xargs $1 -a; \
1462 $(all-kconfigs) | xargs $1 -a \
Masatake YAMATOa95bcfa2008-05-07 16:04:31 +09001463 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
David Gibson18e39912006-10-04 02:15:32 -07001464 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001465 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1466 else \
1467 $(all-sources) | xargs $1 -a; \
1468 fi
1469endef
1470
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001472 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473
1474quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001475 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
1477cscope: FORCE
1478 $(call cmd,cscope-file)
1479 $(call cmd,cscope)
1480
1481quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001482define cmd_TAGS
1483 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001484 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001485endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001487TAGS: FORCE
1488 $(call cmd,TAGS)
1489
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490quiet_cmd_tags = MAKE $@
1491define cmd_tags
1492 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001493 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494endef
1495
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496tags: FORCE
1497 $(call cmd,tags)
1498
1499
1500# Scripts to check various things for consistency
1501# ---------------------------------------------------------------------------
1502
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503includecheck:
1504 find * $(RCS_FIND_IGNORE) \
1505 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001506 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
1508versioncheck:
1509 find * $(RCS_FIND_IGNORE) \
1510 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001511 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513namespacecheck:
1514 $(PERL) $(srctree)/scripts/namespace.pl
1515
Adrian Bunk295ac052007-08-24 23:04:56 +02001516export_report:
1517 $(PERL) $(srctree)/scripts/export_report.pl
1518
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519endif #ifeq ($(config-targets),1)
1520endif #ifeq ($(mixed-targets),1)
1521
Roman Zippelc30a02e2006-06-08 22:12:50 -07001522PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001523
Jeff Dike011e3a92006-12-13 00:34:12 -08001524# UML needs a little special treatment here. It wants to use the host
1525# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1526# else wants $(ARCH), including people doing cross-builds, which means
1527# that $(SUBARCH) doesn't work here.
1528ifeq ($(ARCH), um)
1529CHECKSTACK_ARCH := $(SUBARCH)
1530else
1531CHECKSTACK_ARCH := $(ARCH)
1532endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533checkstack:
1534 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001535 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
1537kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001538 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1539 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001540kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001541 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542
Sam Ravnborg06300b22006-01-25 07:13:18 +01001543# Single targets
1544# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001545# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001546# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001547# - build with separate output dir 'make O=...'
1548# - external modules
1549#
1550# target-dir => where to store outputfile
1551# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001552
Sam Ravnborg06300b22006-01-25 07:13:18 +01001553ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001554 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001555 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001556else
1557 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001558 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1559 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001560endif
1561
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001562%.s: %.c prepare scripts FORCE
1563 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1564%.i: %.c prepare scripts FORCE
1565 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1566%.o: %.c prepare scripts FORCE
1567 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1568%.lst: %.c prepare scripts FORCE
1569 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1570%.s: %.S prepare scripts FORCE
1571 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1572%.o: %.S prepare scripts FORCE
1573 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001574%.symtypes: %.c prepare scripts FORCE
1575 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001576
1577# Modules
1578/ %/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001579 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001580 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001581 $(build)=$(build-dir)
1582%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001583 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001584 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001585 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001586 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588# FIXME Should go into a make.lib or something
1589# ===========================================================================
1590
1591quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1592 cmd_rmdirs = rm -rf $(rm-dirs)
1593
1594quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1595 cmd_rmfiles = rm -f $(rm-files)
1596
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001597# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001598quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1599 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001600 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001601 $(DEPMOD) -ae -F System.map \
1602 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1603 $(KERNELRELEASE); \
1604 fi
1605
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001606# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001607# clean it up only when building all modules
1608cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1609 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
Sam Ravnborg222d3942007-10-15 21:59:31 +02001611a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg06c50402007-10-15 22:17:25 +02001612 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001613 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614
1615quiet_cmd_as_o_S = AS $@
1616cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1617
1618# read all saved command lines
1619
1620targets := $(wildcard $(sort $(targets)))
1621cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1622
1623ifneq ($(cmd_files),)
1624 $(cmd_files): ; # Do not try to update included dependency files
1625 include $(cmd_files)
1626endif
1627
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1629# Usage:
1630# $(Q)$(MAKE) $(clean)=dir
1631clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1632
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633endif # skip-makefile
1634
Paul Smith4f193362006-03-05 17:14:10 -05001635PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001637
Paul Smith4f193362006-03-05 17:14:10 -05001638# Declare the contents of the .PHONY variable as phony. We keep that
1639# information in a variable se we can use it in if_changed and friends.
1640.PHONY: $(PHONY)