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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc9927c22007-10-23 20:50:57 -07003SUBLEVEL = 24
4EXTRAVERSION = -rc1
Linus Torvalds81cfe792007-09-19 16:01:13 -07005NAME = Arr Matey! A Hairy Bilge Rat!
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
15# (this increases performance and avoid hard-to-debug behavour);
16# 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 := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
111ifneq ($(KBUILD_OUTPUT),)
112# Invoke a second make in the output directory, passing relevant variables
113# check that the output directory actually exists
114saved-output := $(KBUILD_OUTPUT)
115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116$(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
Sam Ravnborg4f1127e2007-09-26 19:38:44 +0200118# Check that OUTPUT directory is not the same as where we have kernel src
119$(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
120 $(error Output directory (O=...) specifies kernel src dir))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Milton Miller0b357862007-09-21 18:09:02 -0500122PHONY += $(MAKECMDGOALS) sub-make
123
124$(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
125 $(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/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173# Cross compiling and selecting different set of gcc/bin-utils
174# ---------------------------------------------------------------------------
175#
176# When performing cross compilation for other architectures ARCH shall be set
177# to the target architecture. (See arch/* for the possibilities).
178# ARCH can be set during invocation of make:
179# make ARCH=ia64
180# Another way is to have ARCH set in the environment.
181# The default ARCH is the host where make is executed.
182
183# CROSS_COMPILE specify the prefix used for all executables used
184# during compilation. Only gcc and related bin-utils executables
185# are prefixed with $(CROSS_COMPILE).
186# CROSS_COMPILE can be set on the command line
187# make CROSS_COMPILE=ia64-linux-
188# Alternatively CROSS_COMPILE can be set in the environment.
189# Default value for CROSS_COMPILE is not to prefix executables
190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
191
192ARCH ?= $(SUBARCH)
193CROSS_COMPILE ?=
194
195# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200196UTS_MACHINE := $(ARCH)
197SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200199# for i386 and x86_64 we use SRCARCH equal to x86
200SRCARCH := $(if $(filter x86_64 i386,$(SRCARCH)),x86,$(SRCARCH))
201
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700202KCONFIG_CONFIG ?= .config
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204# SHELL used by kbuild
205CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
206 else if [ -x /bin/bash ]; then echo /bin/bash; \
207 else echo sh; fi ; fi)
208
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200209HOSTCC = gcc
210HOSTCXX = g++
211HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
212HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200214# Decide whether to build built-in, modular, or both.
215# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
217KBUILD_MODULES :=
218KBUILD_BUILTIN := 1
219
220# If we have only "make modules", don't compile built-in objects.
221# When we're building modules with modversions, we need to consider
222# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200223# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225ifeq ($(MAKECMDGOALS),modules)
226 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
227endif
228
229# If we have "make <whatever> modules", compile modules
230# in addition to whatever we do anyway.
231# Just "make" or "make all" shall build modules as well
232
233ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
234 KBUILD_MODULES := 1
235endif
236
237ifeq ($(MAKECMDGOALS),)
238 KBUILD_MODULES := 1
239endif
240
Sam Ravnborge579d352005-07-27 08:10:10 +0200241export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
243
244# Beautify output
245# ---------------------------------------------------------------------------
246#
247# Normally, we echo the whole command before executing it. By making
248# that echo $($(quiet)$(cmd)), we now have the possibility to set
249# $(quiet) to choose other forms of output instead, e.g.
250#
251# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
252# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
253#
254# If $(quiet) is empty, the whole command will be printed.
255# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200256# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257# the variable $(silent_cmd_cc_o_c) doesn't exist.
258#
Adrian Bunka58a4142006-01-10 00:08:17 +0100259# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260# for commands that shall be hidden in non-verbose mode.
261#
262# $(Q)ln $@ :<
263#
264# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
265# If KBUILD_VERBOSE equals 1 then the above command is displayed.
266
267ifeq ($(KBUILD_VERBOSE),1)
268 quiet =
269 Q =
270else
271 quiet=quiet_
272 Q = @
273endif
274
275# If the user is running make -s (silent mode), suppress echoing of
276# commands
277
278ifneq ($(findstring s,$(MAKEFLAGS)),)
279 quiet=silent_
280endif
281
282export quiet Q KBUILD_VERBOSE
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
285# Look for make include files relative to root of kernel src
286MAKEFLAGS += --include-dir=$(srctree)
287
Oleg Verych15964862006-12-10 02:18:40 -0800288# We need some generic definitions.
289include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291# Make variables (CC, etc...)
292
293AS = $(CROSS_COMPILE)as
294LD = $(CROSS_COMPILE)ld
295CC = $(CROSS_COMPILE)gcc
296CPP = $(CC) -E
297AR = $(CROSS_COMPILE)ar
298NM = $(CROSS_COMPILE)nm
299STRIP = $(CROSS_COMPILE)strip
300OBJCOPY = $(CROSS_COMPILE)objcopy
301OBJDUMP = $(CROSS_COMPILE)objdump
302AWK = awk
303GENKSYMS = scripts/genksyms/genksyms
304DEPMOD = /sbin/depmod
305KALLSYMS = scripts/kallsyms
306PERL = perl
307CHECK = sparse
308
Al Viroaf4ca452005-10-21 02:55:38 -0400309CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310MODFLAGS = -DMODULE
311CFLAGS_MODULE = $(MODFLAGS)
312AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700313LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314CFLAGS_KERNEL =
315AFLAGS_KERNEL =
316
317
318# Use LINUXINCLUDE when you must reference the include/ directory.
319# Needed to be compatible with the O= option
320LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100321 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800322 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Sam Ravnborg06c50402007-10-15 22:17:25 +0200324KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200326KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700327 -fno-strict-aliasing -fno-common \
328 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200329KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700331# Read KERNELRELEASE from include/config/kernel.release (if it exists)
332KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100333KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100334
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200335export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200336export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200337export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
338export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Sam Ravnborg06c50402007-10-15 22:17:25 +0200340export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200341export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200342export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344# When compiling out-of-tree modules, put MODVERDIR in the module
345# tree rather than in the kernel tree. The kernel tree might
346# even be read-only.
347export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349# Files to ignore in find ... statements
350
Trond Myklebust406119f2005-10-27 14:46:53 -0400351RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
352export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354# ===========================================================================
355# Rules shared between *config targets and build targets
356
357# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500358PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359scripts_basic:
360 $(Q)$(MAKE) $(build)=scripts/basic
361
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200362# To avoid any implicit rule to kick in, define an empty command.
363scripts/basic/%: scripts_basic ;
364
Paul Smith4f193362006-03-05 17:14:10 -0500365PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200366# outputmakefile generates a Makefile in the output directory, if using a
367# separate output directory. This allows convenient use of make in the
368# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200370ifneq ($(KBUILD_SRC),)
371 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
372 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
373endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375# To make sure we do not include .config for any of the *config targets
376# catch them early, and hand them over to scripts/kconfig/Makefile
377# It is allowed to specify more targets when calling make, including
378# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200379# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380# Detect when mixed targets is specified, and make a second invocation
381# of make so .config is not included in this case either (for *config).
382
Roman Zippel3eb3c742007-01-10 14:45:28 +0100383no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700384 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100385 include/linux/version.h headers_% \
386 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388config-targets := 0
389mixed-targets := 0
390dot-config := 1
391
392ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
393 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
394 dot-config := 0
395 endif
396endif
397
398ifeq ($(KBUILD_EXTMOD),)
399 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
400 config-targets := 1
401 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
402 mixed-targets := 1
403 endif
404 endif
405endif
406
407ifeq ($(mixed-targets),1)
408# ===========================================================================
409# We're called with mixed targets (*config and build targets).
410# Handle them one by one.
411
412%:: FORCE
413 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
414
415else
416ifeq ($(config-targets),1)
417# ===========================================================================
418# *config targets only - make sure prerequisites are updated, and descend
419# in scripts/kconfig to make the *config target
420
421# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
422# KBUILD_DEFCONFIG may point out an alternative default configuration
423# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200424include $(srctree)/arch/$(SRCARCH)/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425export KBUILD_DEFCONFIG
426
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200427config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700428 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 $(Q)$(MAKE) $(build)=scripts/kconfig $@
430
431else
432# ===========================================================================
433# Build targets only - this includes vmlinux, arch specific targets, clean
434# targets and others. In general all targets except *config targets.
435
436ifeq ($(KBUILD_EXTMOD),)
437# Additional helpers built in scripts/
438# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200439# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500440PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700441scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 $(Q)$(MAKE) $(build)=$(@)
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444# Objects we will link into vmlinux / subdirs we need to visit
445init-y := init/
446drivers-y := drivers/ sound/
447net-y := net/
448libs-y := lib/
449core-y := usr/
450endif # KBUILD_EXTMOD
451
452ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200453# Read in config
454-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200456ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457# Read in dependencies to all Kconfig* files, make sure to run
458# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700459-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700462$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Roman Zippelc955cca2006-06-08 22:12:39 -0700464# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100465# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200466# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100467# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700468include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
470else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200471# external modules needs include/linux/autoconf.h and include/config/auto.conf
472# but do not care if they are up-to-date. Use auto.conf to trigger the test
473PHONY += include/config/auto.conf
474
475include/config/auto.conf:
476 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
477 echo; \
478 echo " ERROR: Kernel configuration is invalid."; \
479 echo " include/linux/autoconf.h or $@ are missing."; \
480 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
481 echo; \
482 /bin/false)
483
484endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486else
487# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700488include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200489endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491# The all: target is the default when no target is given on the
492# command line.
493# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200494# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495all: vmlinux
496
497ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200498KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200500KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501endif
502
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200503include $(srctree)/arch/$(SRCARCH)/Makefile
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200506KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200508KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509endif
510
511ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200512KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200513KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514endif
515
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200516# Force gcc to behave correct even for buggy distributions
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200517KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
Sam Ravnborge8e69932005-04-30 16:51:42 -0700519# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700520NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700521CHECKFLAGS += $(NOSTDINC_FLAGS)
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200524KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200526# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200527KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Sam Ravnborg06c50402007-10-15 22:17:25 +0200529# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
530KBUILD_CPPFLAGS += $(CPPFLAGS)
531KBUILD_AFLAGS += $(AFLAGS)
532KBUILD_CFLAGS += $(CFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200533
Roland McGrath18991192007-07-19 01:48:40 -0700534# Use --build-id when available.
535LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
536 $(call ld-option, -Wl$(comma)--build-id,))
537LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
538LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200541# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542# set in the environment
543# Also any assignments in arch/$(ARCH)/Makefile take precedence over
544# this default value
545export KBUILD_IMAGE ?= vmlinux
546
547#
548# INSTALL_PATH specifies where to place the updated kernel and system map
549# images. Default is /boot, but you can set it to other values
550export INSTALL_PATH ?= /boot
551
552#
553# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
554# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200555# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556#
557
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100558MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559export MODLIB
560
Theodore Ts'oac031f22006-06-21 20:53:09 -0400561#
562# INSTALL_MOD_STRIP, if defined, will cause modules to be
563# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
564# the default option --strip-debug will be used. Otherwise,
565# INSTALL_MOD_STRIP will used as the options to the strip command.
566
567ifdef INSTALL_MOD_STRIP
568ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200569mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400570else
571mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
572endif # INSTALL_MOD_STRIP=1
573else
574mod_strip_cmd = true
575endif # INSTALL_MOD_STRIP
576export mod_strip_cmd
577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
579ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100580core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
583 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
584 $(net-y) $(net-m) $(libs-y) $(libs-m)))
585
586vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
587 $(init-n) $(init-) \
588 $(core-n) $(core-) $(drivers-n) $(drivers-) \
589 $(net-n) $(net-) $(libs-n) $(libs-))))
590
591init-y := $(patsubst %/, %/built-in.o, $(init-y))
592core-y := $(patsubst %/, %/built-in.o, $(core-y))
593drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
594net-y := $(patsubst %/, %/built-in.o, $(net-y))
595libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
596libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
597libs-y := $(libs-y1) $(libs-y2)
598
599# Build vmlinux
600# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200601# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200603# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604# Ordering when linking is important, and $(vmlinux-init) must be first.
605#
606# vmlinux
607# ^
608# |
609# +-< $(vmlinux-init)
610# | +--< init/version.o + more
611# |
612# +--< $(vmlinux-main)
613# | +--< driver/built-in.o mm/built-in.o + more
614# |
615# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
616#
617# vmlinux version (uname -v) cannot be updated during normal
618# descending-into-subdirs phase since we do not yet know if we need to
619# update vmlinux.
620# Therefore this step is delayed until just before final link of vmlinux -
621# except in the kallsyms case where it is done just before adding the
622# symbols to the kernel.
623#
624# System.map is generated to document addresses of all kernel symbols
625
626vmlinux-init := $(head-y) $(init-y)
627vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
628vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200629vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100630export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
632# Rule to link vmlinux - also used during CONFIG_KALLSYMS
633# May be overridden by arch/$(ARCH)/Makefile
634quiet_cmd_vmlinux__ ?= LD $@
635 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
636 -T $(vmlinux-lds) $(vmlinux-init) \
637 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200638 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640# Generate new vmlinux version
641quiet_cmd_vmlinux_version = GEN .version
642 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200643 if [ ! -r .version ]; then \
644 rm -f .version; \
645 echo 1 >.version; \
646 else \
647 mv .version .old_version; \
648 expr 0$$(cat .old_version) + 1 >.version; \
649 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 $(MAKE) $(build)=init
651
652# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200653quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
655
656# Link of vmlinux
657# If CONFIG_KALLSYMS is set .version is already updated
658# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700659# Use + in front of the vmlinux_version rule to silent warning with make -j2
660# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700662 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
664
665 $(call cmd,vmlinux__)
666 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
667
Sam Ravnborg46352812006-08-08 21:41:18 +0200668 $(Q)$(if $($(quiet)cmd_sysmap), \
669 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
670 $(cmd_sysmap) $@ System.map; \
671 if [ $$? -ne 0 ]; then \
672 rm -f $@; \
673 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 fi;
675 $(verify_kallsyms)
676endef
677
678
679ifdef CONFIG_KALLSYMS
680# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
681# It's a three stage process:
682# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
683# empty
684# Running kallsyms on that gives us .tmp_kallsyms1.o with
685# the right size - vmlinux version (uname -v) is updated during this step
686# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
687# but due to the added section, some addresses have shifted.
688# From here, we generate a correct .tmp_kallsyms2.o
689# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
690# o Verify that the System.map from vmlinux matches the map from
691# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
692# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
693# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
694# temporary bypass to allow the kernel to be built while the
695# maintainers work out what went wrong with kallsyms.
696
697ifdef CONFIG_KALLSYMS_EXTRA_PASS
698last_kallsyms := 3
699else
700last_kallsyms := 2
701endif
702
703kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
704
705define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200706 $(Q)$(if $($(quiet)cmd_sysmap), \
707 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200709 $(Q)cmp -s System.map .tmp_System.map || \
710 (echo Inconsistent kallsyms data; \
711 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 rm .tmp_kallsyms* ; /bin/false )
713endef
714
715# Update vmlinux version before link
716# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200717# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718cmd_ksym_ld = $(cmd_vmlinux__)
719define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200720 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 +$(call cmd,vmlinux_version)
722 $(call cmd,vmlinux__)
723 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
724endef
725
726# Generate .S file with all kernel symbols
727quiet_cmd_kallsyms = KSYM $@
728 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
729 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
730
731.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
732 $(call if_changed_dep,as_o_S)
733
734.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
735 $(call cmd,kallsyms)
736
737# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
738.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
739 $(call if_changed_rule,ksym_ld)
740
741.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
742 $(call if_changed,vmlinux__)
743
744.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
745 $(call if_changed,vmlinux__)
746
747# Needs to visit scripts/ before $(KALLSYMS) can be used.
748$(KALLSYMS): scripts ;
749
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000750# Generate some data for debugging strange kallsyms problems
751debug_kallsyms: .tmp_map$(last_kallsyms)
752
753.tmp_map%: .tmp_vmlinux% FORCE
754 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
755
756.tmp_map3: .tmp_map2
757
758.tmp_map2: .tmp_map1
759
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760endif # ifdef CONFIG_KALLSYMS
761
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200762# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
763# relevant sections renamed as per the linker script.
764quiet_cmd_vmlinux-modpost = LD $@
765 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
766 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
767 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
768define rule_vmlinux-modpost
769 :
770 +$(call cmd,vmlinux-modpost)
771 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
772 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
773endef
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775# vmlinux image - including updated kernel symbols
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200776vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700777ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100778 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700779endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700780ifdef CONFIG_SAMPLES
781 $(Q)$(MAKE) $(build)=samples
782endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200783 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200785 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200787vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
788 $(call if_changed_rule,vmlinux-modpost)
789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790# The actual objects are generated when descending,
791# make sure no implicit rule kicks in
792$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
793
794# Handle descending into subdirectories listed in $(vmlinux-dirs)
795# Preset locale variables to speed up the build process. Limit locale
796# tweaks to this spot to avoid wrong language settings when running
797# make menuconfig etc.
798# Error messages still appears in the original language
799
Paul Smith4f193362006-03-05 17:14:10 -0500800PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200801$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 $(Q)$(MAKE) $(build)=$@
803
Sam Ravnborgcb584552006-01-09 21:20:34 +0100804# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100805#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400806# The KERNELRELEASE value built here is stored in the file
807# include/config/kernel.release, and is used when executing several
808# make targets, such as "make install" or "make modules_install."
809#
810# The eventual kernel release string consists of the following fields,
811# shown in a hierarchical format to show how smaller parts are concatenated
812# to form the larger and final value, with values coming from places like
813# the Makefile, kernel config options, make command line options and/or
814# SCM tag information.
815#
816# $(KERNELVERSION)
817# $(VERSION) eg, 2
818# $(PATCHLEVEL) eg, 6
819# $(SUBLEVEL) eg, 18
820# $(EXTRAVERSION) eg, -rc6
821# $(localver-full)
822# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100823# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400824# $(CONFIG_LOCALVERSION) (from kernel config setting)
825# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
826# ./scripts/setlocalversion (SCM tag, if one exists)
827# $(LOCALVERSION) (from make command line if provided)
828#
829# Note how the final $(localver-auto) string is included *only* if the
830# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
831# moment, only git is supported but other SCMs can edit the script
832# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100833
Oleg Verych76c32952007-02-06 02:18:22 +0100834pattern = ".*/localversion[^~]*"
835string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800836 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100837
Oleg Verych76c32952007-02-06 02:18:22 +0100838localver = $(subst $(space),, $(string) \
839 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200840
Sam Ravnborgcb584552006-01-09 21:20:34 +0100841# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
842# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200843# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100844#
845# Currently, only git is supported.
846# Other SCMs can edit scripts/setlocalversion and add the appropriate
847# checks as needed.
848ifdef CONFIG_LOCALVERSION_AUTO
849 _localver-auto = $(shell $(CONFIG_SHELL) \
850 $(srctree)/scripts/setlocalversion $(srctree))
851 localver-auto = $(LOCALVERSION)$(_localver-auto)
852endif
853
854localver-full = $(localver)$(localver-auto)
855
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700856# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100857kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700858include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100859 $(Q)rm -f $@
860 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100861
862
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200864# or the modules are listed in "prepare".
865# A multi level approach is used. prepareN is processed before prepareN-1.
866# archprepare is used in arch Makefiles and when processed asm symlink,
867# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200869# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500870PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200871
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200872# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873# and if so do:
874# 1) Check that make has not been executed in the kernel src $(srctree)
875# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700876prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877ifneq ($(KBUILD_SRC),)
878 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700879 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 echo " $(srctree) is not clean, please run 'make mrproper'";\
881 echo " in the '$(srctree)' directory.";\
882 /bin/false; \
883 fi;
884 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200885 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886endif
887
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200888# prepare2 creates a makefile if using a separate output directory
889prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
Roman Zippel3eb3c742007-01-10 14:45:28 +0100891prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
892 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200893 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200895archprepare: prepare1 scripts_basic
896
897prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200898 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200899 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800902prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200904# Leave this as default for preprocessing vmlinux.lds.S, which is now
905# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
907export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
908
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200909# The asm symlink changes when $(ARCH) changes.
910# Detect this and ask user to run make mrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200912include/asm: FORCE
913 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
914 if [ -L include/asm ]; then \
915 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
916 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
917 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
918 exit 1; \
919 fi; \
920 else \
921 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
922 if [ ! -d include ]; then \
923 mkdir -p include; \
924 fi; \
925 ln -fsn asm-$(SRCARCH) $@; \
926 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928# Generate some files
929# ---------------------------------------------------------------------------
930
931# KERNELRELEASE can change from a few different places, meaning version.h
932# needs to be updated, so this check is forced on all builds
933
934uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200935define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200937 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
938 exit 1; \
939 fi; \
940 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941endef
942
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200943define filechk_version.h
944 (echo \#define LINUX_VERSION_CODE $(shell \
945 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
946 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
947endef
948
949include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 $(call filechk,version.h)
951
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200952include/linux/utsrelease.h: include/config/kernel.release FORCE
953 $(call filechk,utsrelease.h)
954
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955# ---------------------------------------------------------------------------
956
Paul Smith4f193362006-03-05 17:14:10 -0500957PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958depend dep:
959 @echo '*** Warning: make $@ is unnecessary now.'
960
961# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100962# Kernel headers
David Woodhouse1ab7a1f2006-09-16 12:15:55 -0700963INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100964export INSTALL_HDR_PATH
965
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200966HDRFILTER=generic i386 x86_64
967HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
David Woodhouse6d716272006-09-24 22:16:03 +0100968
969PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +0100970headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -0700971 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100972 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700973 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100974 done
975
David Woodhouse8d730cf2006-06-18 11:58:39 +0100976PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +0100977headers_install: include/linux/version.h scripts_basic FORCE
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200978 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
979 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100980 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200981 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200982 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100983
Mike Frysinger1f857122007-02-14 00:33:02 -0800984PHONY += headers_check_all
985headers_check_all: headers_install_all
986 $(Q)for arch in $(HDRARCHES); do \
987 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
988 done
989
David Woodhouse68475352006-06-18 12:02:10 +0100990PHONY += headers_check
991headers_check: headers_install
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200992 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100993
David Woodhouse8d730cf2006-06-18 11:58:39 +0100994# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995# Modules
996
997ifdef CONFIG_MODULES
998
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200999# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
1001all: modules
1002
1003# Build modules
1004
Paul Smith4f193362006-03-05 17:14:10 -05001005PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1007 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001008 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
1010
1011# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001012PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001013modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
1015# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001016PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017modules_install: _modinst_ _modinst_post
1018
Paul Smith4f193362006-03-05 17:14:10 -05001019PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001021 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 echo "Warning: you may need to install module-init-tools"; \
1023 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1024 sleep 1; \
1025 fi
1026 @rm -rf $(MODLIB)/kernel
1027 @rm -f $(MODLIB)/source
1028 @mkdir -p $(MODLIB)/kernel
1029 @ln -s $(srctree) $(MODLIB)/source
1030 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1031 rm -f $(MODLIB)/build ; \
1032 ln -s $(objtree) $(MODLIB)/build ; \
1033 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001034 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001036# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037# boot a modules.dep even before / is mounted read-write. However the
1038# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001039PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040_modinst_post: _modinst_
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001041 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
1043else # CONFIG_MODULES
1044
1045# Modules not configured
1046# ---------------------------------------------------------------------------
1047
1048modules modules_install: FORCE
1049 @echo
1050 @echo "The present kernel configuration has modules disabled."
1051 @echo "Type 'make config' and enable loadable module support."
1052 @echo "Then build a kernel with module support enabled."
1053 @echo
1054 @exit 1
1055
1056endif # CONFIG_MODULES
1057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058###
1059# Cleaning is done on three levels.
1060# make clean Delete most generated files
1061# Leave enough to build external modules
1062# make mrproper Delete the current configuration, and all generated files
1063# make distclean Remove editor backup files, patch leftover files and the like
1064
1065# Directories & files removed with 'make clean'
1066CLEAN_DIRS += $(MODVERDIR)
1067CLEAN_FILES += vmlinux System.map \
1068 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1069
1070# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001071MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001072MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001073 include/linux/autoconf.h include/linux/version.h \
1074 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001075 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
1077# clean - Delete most, but leave enough to build external modules
1078#
1079clean: rm-dirs := $(CLEAN_DIRS)
1080clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001081clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
Paul Smith4f193362006-03-05 17:14:10 -05001083PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084$(clean-dirs):
1085 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1086
1087clean: archclean $(clean-dirs)
1088 $(call cmd,rmdirs)
1089 $(call cmd,rmfiles)
1090 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001091 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001092 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1093 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 -type f -print | xargs rm -f
1095
1096# mrproper - Delete all generated files, including .config
1097#
1098mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1099mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1100mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1101
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103$(mrproper-dirs):
1104 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1105
1106mrproper: clean archmrproper $(mrproper-dirs)
1107 $(call cmd,rmdirs)
1108 $(call cmd,rmfiles)
1109
1110# distclean
1111#
Paul Smith4f193362006-03-05 17:14:10 -05001112PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114distclean: mrproper
1115 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001116 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001118 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1120 -type f -print | xargs rm -f
1121
1122
1123# Packaging of the kernel to various formats
1124# ---------------------------------------------------------------------------
1125# rpm target kept for backward compatibility
1126package-dir := $(srctree)/scripts/package
1127
Zach Brown031ecc62006-06-08 22:12:37 -07001128%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001129 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001130rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001131 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133
1134# Brief documentation of the typical targets used
1135# ---------------------------------------------------------------------------
1136
1137boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1138boards := $(notdir $(boards))
1139
1140help:
1141 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001142 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001143 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001144 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001145 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 @echo ''
1147 @echo 'Configuration targets:'
1148 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1149 @echo ''
1150 @echo 'Other generic targets:'
1151 @echo ' all - Build all targets marked with [*]'
1152 @echo '* vmlinux - Build the bare kernel'
1153 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001154 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 @echo ' dir/ - Build all files in dir and below'
1156 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001157 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 @echo ' rpm - Build a kernel as an RPM package'
1159 @echo ' tags/TAGS - Generate tags file for editors'
1160 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001161 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001162 @echo ' kernelversion - Output the version stored in Makefile'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001163 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001164 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001165 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001166 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 @echo ''
1168 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 @echo ' checkstack - Generate a list of stack hogs'
1170 @echo ' namespacecheck - Name space analysis on compiled kernel'
Adrian Bunk295ac052007-08-24 23:04:56 +02001171 @echo ' export_report - List the usages of all exported symbols'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001172 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001173 echo ' headers_check - Sanity check on exported headers'; \
1174 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 @echo ''
1176 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001177 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 @echo ''
1179 @echo 'Documentation targets:'
1180 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1181 @echo ''
1182 @echo 'Architecture specific targets ($(ARCH)):'
1183 @$(if $(archhelp),$(archhelp),\
1184 echo ' No architecture specific help defined for $(ARCH)')
1185 @echo ''
1186 @$(if $(boards), \
1187 $(foreach b, $(boards), \
1188 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1189 echo '')
1190
1191 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001192 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001194 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1195 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 @echo ''
1197 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1198 @echo 'For further info see the ./README file'
1199
1200
1201# Documentation targets
1202# ---------------------------------------------------------------------------
1203%docs: scripts_basic FORCE
1204 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1205
1206else # KBUILD_EXTMOD
1207
1208###
1209# External module support.
1210# When building external modules the kernel used as basis is considered
1211# read-only, and no consistency checks are made and the make
1212# system is not used on the basis kernel. If updates are required
1213# in the basis kernel ordinary make commands (without M=...) must
1214# be used.
1215#
1216# The following are the only valid targets when building external
1217# modules.
1218# make M=dir clean Delete all automatically generated files
1219# make M=dir modules Make all modules in specified dir
1220# make M=dir Same as 'make M=dir modules'
1221# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001222# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223# Assumes install directory is already created
1224
1225# We are always building modules
1226KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001227PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001229 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230
Paul Smith4f193362006-03-05 17:14:10 -05001231PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232$(objtree)/Module.symvers:
1233 @test -e $(objtree)/Module.symvers || ( \
1234 echo; \
1235 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1236 echo " is missing; modules will have no dependencies and modversions."; \
1237 echo )
1238
1239module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001240PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241$(module-dirs): crmodverdir $(objtree)/Module.symvers
1242 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1243
1244modules: $(module-dirs)
1245 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001246 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Paul Smith4f193362006-03-05 17:14:10 -05001248PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001249modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001250
Paul Smith4f193362006-03-05 17:14:10 -05001251install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1252PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001253_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001254 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001255 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Paul Smith4f193362006-03-05 17:14:10 -05001257PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001258_emodinst_post: _emodinst_
1259 $(call cmd,depmod)
1260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1262
Paul Smith4f193362006-03-05 17:14:10 -05001263PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264$(clean-dirs):
1265 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1266
1267clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001268clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269clean: $(clean-dirs)
1270 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001271 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001273 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1275 -type f -print | xargs rm -f
1276
1277help:
1278 @echo ' Building external modules.'
1279 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1280 @echo ''
1281 @echo ' modules - default target, build the module(s)'
1282 @echo ' modules_install - install the module'
1283 @echo ' clean - remove generated files in module directory only'
1284 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001285
1286# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001287PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001288prepare: ;
1289scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290endif # KBUILD_EXTMOD
1291
1292# Generate tags for editors
1293# ---------------------------------------------------------------------------
1294
1295#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1296#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1297#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1298
George Anzingerf182ae62005-07-07 17:56:06 -07001299ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300__srctree =
1301else
1302__srctree = $(srctree)/
1303endif
1304
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001305ifeq ($(ALLSOURCE_ARCHS),)
1306ifeq ($(ARCH),um)
1307ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1308else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001309ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001310endif
1311else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001312#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001313ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1314endif
1315
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001316# Take care of arch/x86
1317ifeq ($(ARCH), $(SRCARCH))
Ian Campbella0674e82005-06-23 11:25:54 +01001318ALLSOURCE_ARCHS := $(ARCH)
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001319else
1320ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
1321endif
Ian Campbella0674e82005-06-23 11:25:54 +01001322
Masatake YAMATOe838db62006-06-22 12:21:20 +09001323define find-sources
Yinghai Luf8bea582007-10-16 00:28:06 -07001324 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1325 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001326 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001327 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001329 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 find $(__srctree)include $(RCS_FIND_IGNORE) \
1331 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001332 -o -name $1 -print; \
Yinghai Luf8bea582007-10-16 00:28:06 -07001333 for arch in $(ALLINCLUDE_ARCHS) ; do \
1334 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001335 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001336 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001338 -name $1 -print; \
1339 find $(__srctree) $(RCS_FIND_IGNORE) \
Yinghai Lu37ab7a22007-10-17 16:43:39 -07001340 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001341 -name $1 -print; \
1342 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001343endef
1344
1345define all-sources
1346 $(call find-sources,'*.[chS]')
1347endef
1348define all-kconfigs
1349 $(call find-sources,'Kconfig*')
1350endef
1351define all-defconfigs
1352 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353endef
1354
Aron Griffisda7c0402006-09-21 00:27:02 -04001355define xtags
1356 if $1 --version 2>&1 | grep -iq exuberant; then \
1357 $(all-sources) | xargs $1 -a \
1358 -I __initdata,__exitdata,__acquires,__releases \
1359 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001360 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001361 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001362 $(all-kconfigs) | xargs $1 -a \
1363 --langdef=kconfig \
1364 --language-force=kconfig \
1365 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001366 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001367 --langdef=dotconfig \
1368 --language-force=dotconfig \
1369 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1370 elif $1 --version 2>&1 | grep -iq emacs; then \
1371 $(all-sources) | xargs $1 -a; \
1372 $(all-kconfigs) | xargs $1 -a \
1373 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001374 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001375 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1376 else \
1377 $(all-sources) | xargs $1 -a; \
1378 fi
1379endef
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001382 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
1384quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001385 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387cscope: FORCE
1388 $(call cmd,cscope-file)
1389 $(call cmd,cscope)
1390
1391quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001392define cmd_TAGS
1393 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001394 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001395endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001397TAGS: FORCE
1398 $(call cmd,TAGS)
1399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400quiet_cmd_tags = MAKE $@
1401define cmd_tags
1402 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001403 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404endef
1405
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406tags: FORCE
1407 $(call cmd,tags)
1408
1409
1410# Scripts to check various things for consistency
1411# ---------------------------------------------------------------------------
1412
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413includecheck:
1414 find * $(RCS_FIND_IGNORE) \
1415 -name '*.[hcS]' -type f -print | sort \
1416 | xargs $(PERL) -w scripts/checkincludes.pl
1417
1418versioncheck:
1419 find * $(RCS_FIND_IGNORE) \
1420 -name '*.[hcS]' -type f -print | sort \
1421 | xargs $(PERL) -w scripts/checkversion.pl
1422
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423namespacecheck:
1424 $(PERL) $(srctree)/scripts/namespace.pl
1425
Adrian Bunk295ac052007-08-24 23:04:56 +02001426export_report:
1427 $(PERL) $(srctree)/scripts/export_report.pl
1428
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429endif #ifeq ($(config-targets),1)
1430endif #ifeq ($(mixed-targets),1)
1431
Roman Zippelc30a02e2006-06-08 22:12:50 -07001432PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001433
Jeff Dike011e3a92006-12-13 00:34:12 -08001434# UML needs a little special treatment here. It wants to use the host
1435# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1436# else wants $(ARCH), including people doing cross-builds, which means
1437# that $(SUBARCH) doesn't work here.
1438ifeq ($(ARCH), um)
1439CHECKSTACK_ARCH := $(SUBARCH)
1440else
1441CHECKSTACK_ARCH := $(ARCH)
1442endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443checkstack:
1444 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001445 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
1447kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001448 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1449 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001450kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001451 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
Sam Ravnborg06300b22006-01-25 07:13:18 +01001453# Single targets
1454# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001455# Single targets are compatible with:
1456# - build whith mixed source and output
1457# - build with separate output dir 'make O=...'
1458# - external modules
1459#
1460# target-dir => where to store outputfile
1461# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001462
Sam Ravnborg06300b22006-01-25 07:13:18 +01001463ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001464 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001465 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001466else
1467 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001468 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1469 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001470endif
1471
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001472%.s: %.c prepare scripts FORCE
1473 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1474%.i: %.c prepare scripts FORCE
1475 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476%.o: %.c prepare scripts FORCE
1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478%.lst: %.c prepare scripts FORCE
1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480%.s: %.S prepare scripts FORCE
1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482%.o: %.S prepare scripts FORCE
1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001484%.symtypes: %.c prepare scripts FORCE
1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001486
1487# Modules
1488/ %/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001489 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001490 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001491 $(build)=$(build-dir)
1492%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001493 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001494 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001495 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001496 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001497
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498# FIXME Should go into a make.lib or something
1499# ===========================================================================
1500
1501quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1502 cmd_rmdirs = rm -rf $(rm-dirs)
1503
1504quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1505 cmd_rmfiles = rm -f $(rm-files)
1506
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001507# Run depmod only is we have System.map and depmod is executable
1508# and we build for the host arch
1509quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1510 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001511 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001512 $(DEPMOD) -ae -F System.map \
1513 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1514 $(KERNELRELEASE); \
1515 fi
1516
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001517# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001518# clean it up only when building all modules
1519cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1520 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521
Sam Ravnborg222d3942007-10-15 21:59:31 +02001522a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg06c50402007-10-15 22:17:25 +02001523 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001524 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525
1526quiet_cmd_as_o_S = AS $@
1527cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1528
1529# read all saved command lines
1530
1531targets := $(wildcard $(sort $(targets)))
1532cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1533
1534ifneq ($(cmd_files),)
1535 $(cmd_files): ; # Do not try to update included dependency files
1536 include $(cmd_files)
1537endif
1538
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1540# Usage:
1541# $(Q)$(MAKE) $(clean)=dir
1542clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544endif # skip-makefile
1545
Paul Smith4f193362006-03-05 17:14:10 -05001546PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001548
Oleg Verych15964862006-12-10 02:18:40 -08001549# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1550Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001551
1552# Declare the contents of the .PHONY variable as phony. We keep that
1553# information in a variable se we can use it in if_changed and friends.
1554.PHONY: $(PHONY)