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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc9927c22007-10-23 20:50:57 -07003SUBLEVEL = 24
Linus Torvalds09b56ad2007-12-03 20:26:10 -08004EXTRAVERSION = -rc4
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/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
172 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
192
193ARCH ?= $(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
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700208KCONFIG_CONFIG ?= .config
209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210# SHELL used by kbuild
211CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
212 else if [ -x /bin/bash ]; then echo /bin/bash; \
213 else echo sh; fi ; fi)
214
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200215HOSTCC = gcc
216HOSTCXX = g++
217HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
218HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200220# Decide whether to build built-in, modular, or both.
221# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223KBUILD_MODULES :=
224KBUILD_BUILTIN := 1
225
226# If we have only "make modules", don't compile built-in objects.
227# When we're building modules with modversions, we need to consider
228# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200229# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231ifeq ($(MAKECMDGOALS),modules)
232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
233endif
234
235# If we have "make <whatever> modules", compile modules
236# in addition to whatever we do anyway.
237# Just "make" or "make all" shall build modules as well
238
239ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
240 KBUILD_MODULES := 1
241endif
242
243ifeq ($(MAKECMDGOALS),)
244 KBUILD_MODULES := 1
245endif
246
Sam Ravnborge579d352005-07-27 08:10:10 +0200247export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
249
250# Beautify output
251# ---------------------------------------------------------------------------
252#
253# Normally, we echo the whole command before executing it. By making
254# that echo $($(quiet)$(cmd)), we now have the possibility to set
255# $(quiet) to choose other forms of output instead, e.g.
256#
257# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
258# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
259#
260# If $(quiet) is empty, the whole command will be printed.
261# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200262# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263# the variable $(silent_cmd_cc_o_c) doesn't exist.
264#
Adrian Bunka58a4142006-01-10 00:08:17 +0100265# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266# for commands that shall be hidden in non-verbose mode.
267#
268# $(Q)ln $@ :<
269#
270# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
271# If KBUILD_VERBOSE equals 1 then the above command is displayed.
272
273ifeq ($(KBUILD_VERBOSE),1)
274 quiet =
275 Q =
276else
277 quiet=quiet_
278 Q = @
279endif
280
281# If the user is running make -s (silent mode), suppress echoing of
282# commands
283
284ifneq ($(findstring s,$(MAKEFLAGS)),)
285 quiet=silent_
286endif
287
288export quiet Q KBUILD_VERBOSE
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291# Look for make include files relative to root of kernel src
292MAKEFLAGS += --include-dir=$(srctree)
293
Oleg Verych15964862006-12-10 02:18:40 -0800294# We need some generic definitions.
295include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297# Make variables (CC, etc...)
298
299AS = $(CROSS_COMPILE)as
300LD = $(CROSS_COMPILE)ld
301CC = $(CROSS_COMPILE)gcc
302CPP = $(CC) -E
303AR = $(CROSS_COMPILE)ar
304NM = $(CROSS_COMPILE)nm
305STRIP = $(CROSS_COMPILE)strip
306OBJCOPY = $(CROSS_COMPILE)objcopy
307OBJDUMP = $(CROSS_COMPILE)objdump
308AWK = awk
309GENKSYMS = scripts/genksyms/genksyms
310DEPMOD = /sbin/depmod
311KALLSYMS = scripts/kallsyms
312PERL = perl
313CHECK = sparse
314
Al Viroaf4ca452005-10-21 02:55:38 -0400315CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316MODFLAGS = -DMODULE
317CFLAGS_MODULE = $(MODFLAGS)
318AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700319LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320CFLAGS_KERNEL =
321AFLAGS_KERNEL =
322
323
324# Use LINUXINCLUDE when you must reference the include/ directory.
325# Needed to be compatible with the O= option
326LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100327 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800328 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Sam Ravnborg06c50402007-10-15 22:17:25 +0200330KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200332KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700333 -fno-strict-aliasing -fno-common \
334 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200335KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700337# Read KERNELRELEASE from include/config/kernel.release (if it exists)
338KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100339KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100340
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200341export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100342export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200343export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
344export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Sam Ravnborg06c50402007-10-15 22:17:25 +0200346export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200347export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200348export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350# When compiling out-of-tree modules, put MODVERDIR in the module
351# tree rather than in the kernel tree. The kernel tree might
352# even be read-only.
353export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355# Files to ignore in find ... statements
356
Trond Myklebust406119f2005-10-27 14:46:53 -0400357RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
358export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360# ===========================================================================
361# Rules shared between *config targets and build targets
362
363# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500364PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365scripts_basic:
366 $(Q)$(MAKE) $(build)=scripts/basic
367
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200368# To avoid any implicit rule to kick in, define an empty command.
369scripts/basic/%: scripts_basic ;
370
Paul Smith4f193362006-03-05 17:14:10 -0500371PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200372# outputmakefile generates a Makefile in the output directory, if using a
373# separate output directory. This allows convenient use of make in the
374# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200376ifneq ($(KBUILD_SRC),)
377 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
378 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
379endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381# To make sure we do not include .config for any of the *config targets
382# catch them early, and hand them over to scripts/kconfig/Makefile
383# It is allowed to specify more targets when calling make, including
384# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200385# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386# Detect when mixed targets is specified, and make a second invocation
387# of make so .config is not included in this case either (for *config).
388
Roman Zippel3eb3c742007-01-10 14:45:28 +0100389no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700390 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100391 include/linux/version.h headers_% \
392 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394config-targets := 0
395mixed-targets := 0
396dot-config := 1
397
398ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
399 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 dot-config := 0
401 endif
402endif
403
404ifeq ($(KBUILD_EXTMOD),)
405 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
406 config-targets := 1
407 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
408 mixed-targets := 1
409 endif
410 endif
411endif
412
413ifeq ($(mixed-targets),1)
414# ===========================================================================
415# We're called with mixed targets (*config and build targets).
416# Handle them one by one.
417
418%:: FORCE
419 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
420
421else
422ifeq ($(config-targets),1)
423# ===========================================================================
424# *config targets only - make sure prerequisites are updated, and descend
425# in scripts/kconfig to make the *config target
426
427# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
428# KBUILD_DEFCONFIG may point out an alternative default configuration
429# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200430include $(srctree)/arch/$(SRCARCH)/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431export KBUILD_DEFCONFIG
432
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200433config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700434 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 $(Q)$(MAKE) $(build)=scripts/kconfig $@
436
437else
438# ===========================================================================
439# Build targets only - this includes vmlinux, arch specific targets, clean
440# targets and others. In general all targets except *config targets.
441
442ifeq ($(KBUILD_EXTMOD),)
443# Additional helpers built in scripts/
444# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200445# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500446PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700447scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 $(Q)$(MAKE) $(build)=$(@)
449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450# Objects we will link into vmlinux / subdirs we need to visit
451init-y := init/
452drivers-y := drivers/ sound/
453net-y := net/
454libs-y := lib/
455core-y := usr/
456endif # KBUILD_EXTMOD
457
458ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200459# Read in config
460-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200462ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463# Read in dependencies to all Kconfig* files, make sure to run
464# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700465-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700468$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Roman Zippelc955cca2006-06-08 22:12:39 -0700470# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100471# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200472# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100473# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700474include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
476else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200477# external modules needs include/linux/autoconf.h and include/config/auto.conf
478# but do not care if they are up-to-date. Use auto.conf to trigger the test
479PHONY += include/config/auto.conf
480
481include/config/auto.conf:
482 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
483 echo; \
484 echo " ERROR: Kernel configuration is invalid."; \
485 echo " include/linux/autoconf.h or $@ are missing."; \
486 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
487 echo; \
488 /bin/false)
489
490endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492else
493# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700494include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200495endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497# The all: target is the default when no target is given on the
498# command line.
499# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200500# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501all: vmlinux
502
503ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200504KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200506KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507endif
508
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200509include $(srctree)/arch/$(SRCARCH)/Makefile
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200512KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200514KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515endif
516
517ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200518KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200519KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520endif
521
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200522# Force gcc to behave correct even for buggy distributions
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200523KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Sam Ravnborge8e69932005-04-30 16:51:42 -0700525# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700526NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700527CHECKFLAGS += $(NOSTDINC_FLAGS)
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200530KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200532# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200533KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Sam Ravnborg06c50402007-10-15 22:17:25 +0200535# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100536# But warn user when we do so
537warn-assign = \
538$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
539
540ifneq ($(KCPPFLAGS),)
541 $(call warn-assign,CPPFLAGS)
542 KBUILD_CPPFLAGS += $(KCPPFLAGS)
543endif
544ifneq ($(KAFLAGS),)
545 $(call warn-assign,AFLAGS)
546 KBUILD_AFLAGS += $(KAFLAGS)
547endif
548ifneq ($(KCFLAGS),)
549 $(call warn-assign,CFLAGS)
550 KBUILD_CFLAGS += $(KCFLAGS)
551endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200552
Roland McGrath18991192007-07-19 01:48:40 -0700553# Use --build-id when available.
554LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
555 $(call ld-option, -Wl$(comma)--build-id,))
556LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
557LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200560# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561# set in the environment
562# Also any assignments in arch/$(ARCH)/Makefile take precedence over
563# this default value
564export KBUILD_IMAGE ?= vmlinux
565
566#
567# INSTALL_PATH specifies where to place the updated kernel and system map
568# images. Default is /boot, but you can set it to other values
569export INSTALL_PATH ?= /boot
570
571#
572# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
573# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200574# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575#
576
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100577MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578export MODLIB
579
Theodore Ts'oac031f22006-06-21 20:53:09 -0400580#
581# INSTALL_MOD_STRIP, if defined, will cause modules to be
582# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
583# the default option --strip-debug will be used. Otherwise,
584# INSTALL_MOD_STRIP will used as the options to the strip command.
585
586ifdef INSTALL_MOD_STRIP
587ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200588mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400589else
590mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
591endif # INSTALL_MOD_STRIP=1
592else
593mod_strip_cmd = true
594endif # INSTALL_MOD_STRIP
595export mod_strip_cmd
596
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
598ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100599core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
601vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
602 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
603 $(net-y) $(net-m) $(libs-y) $(libs-m)))
604
605vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
606 $(init-n) $(init-) \
607 $(core-n) $(core-) $(drivers-n) $(drivers-) \
608 $(net-n) $(net-) $(libs-n) $(libs-))))
609
610init-y := $(patsubst %/, %/built-in.o, $(init-y))
611core-y := $(patsubst %/, %/built-in.o, $(core-y))
612drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
613net-y := $(patsubst %/, %/built-in.o, $(net-y))
614libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
615libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
616libs-y := $(libs-y1) $(libs-y2)
617
618# Build vmlinux
619# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200620# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200622# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623# Ordering when linking is important, and $(vmlinux-init) must be first.
624#
625# vmlinux
626# ^
627# |
628# +-< $(vmlinux-init)
629# | +--< init/version.o + more
630# |
631# +--< $(vmlinux-main)
632# | +--< driver/built-in.o mm/built-in.o + more
633# |
634# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
635#
636# vmlinux version (uname -v) cannot be updated during normal
637# descending-into-subdirs phase since we do not yet know if we need to
638# update vmlinux.
639# Therefore this step is delayed until just before final link of vmlinux -
640# except in the kallsyms case where it is done just before adding the
641# symbols to the kernel.
642#
643# System.map is generated to document addresses of all kernel symbols
644
645vmlinux-init := $(head-y) $(init-y)
646vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
647vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200648vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100649export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651# Rule to link vmlinux - also used during CONFIG_KALLSYMS
652# May be overridden by arch/$(ARCH)/Makefile
653quiet_cmd_vmlinux__ ?= LD $@
654 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
655 -T $(vmlinux-lds) $(vmlinux-init) \
656 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200657 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
659# Generate new vmlinux version
660quiet_cmd_vmlinux_version = GEN .version
661 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200662 if [ ! -r .version ]; then \
663 rm -f .version; \
664 echo 1 >.version; \
665 else \
666 mv .version .old_version; \
667 expr 0$$(cat .old_version) + 1 >.version; \
668 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 $(MAKE) $(build)=init
670
671# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200672quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
674
675# Link of vmlinux
676# If CONFIG_KALLSYMS is set .version is already updated
677# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700678# Use + in front of the vmlinux_version rule to silent warning with make -j2
679# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700681 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
683
684 $(call cmd,vmlinux__)
685 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
686
Sam Ravnborg46352812006-08-08 21:41:18 +0200687 $(Q)$(if $($(quiet)cmd_sysmap), \
688 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
689 $(cmd_sysmap) $@ System.map; \
690 if [ $$? -ne 0 ]; then \
691 rm -f $@; \
692 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 fi;
694 $(verify_kallsyms)
695endef
696
697
698ifdef CONFIG_KALLSYMS
699# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
700# It's a three stage process:
701# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
702# empty
703# Running kallsyms on that gives us .tmp_kallsyms1.o with
704# the right size - vmlinux version (uname -v) is updated during this step
705# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
706# but due to the added section, some addresses have shifted.
707# From here, we generate a correct .tmp_kallsyms2.o
708# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
709# o Verify that the System.map from vmlinux matches the map from
710# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
711# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
712# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
713# temporary bypass to allow the kernel to be built while the
714# maintainers work out what went wrong with kallsyms.
715
716ifdef CONFIG_KALLSYMS_EXTRA_PASS
717last_kallsyms := 3
718else
719last_kallsyms := 2
720endif
721
722kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
723
724define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200725 $(Q)$(if $($(quiet)cmd_sysmap), \
726 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200728 $(Q)cmp -s System.map .tmp_System.map || \
729 (echo Inconsistent kallsyms data; \
730 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 rm .tmp_kallsyms* ; /bin/false )
732endef
733
734# Update vmlinux version before link
735# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200736# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737cmd_ksym_ld = $(cmd_vmlinux__)
738define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200739 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 +$(call cmd,vmlinux_version)
741 $(call cmd,vmlinux__)
742 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
743endef
744
745# Generate .S file with all kernel symbols
746quiet_cmd_kallsyms = KSYM $@
747 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
748 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
749
750.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
751 $(call if_changed_dep,as_o_S)
752
753.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
754 $(call cmd,kallsyms)
755
756# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
757.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
758 $(call if_changed_rule,ksym_ld)
759
760.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
761 $(call if_changed,vmlinux__)
762
763.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
764 $(call if_changed,vmlinux__)
765
766# Needs to visit scripts/ before $(KALLSYMS) can be used.
767$(KALLSYMS): scripts ;
768
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000769# Generate some data for debugging strange kallsyms problems
770debug_kallsyms: .tmp_map$(last_kallsyms)
771
772.tmp_map%: .tmp_vmlinux% FORCE
773 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
774
775.tmp_map3: .tmp_map2
776
777.tmp_map2: .tmp_map1
778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779endif # ifdef CONFIG_KALLSYMS
780
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200781# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
782# relevant sections renamed as per the linker script.
783quiet_cmd_vmlinux-modpost = LD $@
784 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
785 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
786 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
787define rule_vmlinux-modpost
788 :
789 +$(call cmd,vmlinux-modpost)
790 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
791 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
792endef
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794# vmlinux image - including updated kernel symbols
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200795vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700796ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100797 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700798endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700799ifdef CONFIG_SAMPLES
800 $(Q)$(MAKE) $(build)=samples
801endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200802 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200804 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200806vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
807 $(call if_changed_rule,vmlinux-modpost)
808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809# The actual objects are generated when descending,
810# make sure no implicit rule kicks in
811$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
812
813# Handle descending into subdirectories listed in $(vmlinux-dirs)
814# Preset locale variables to speed up the build process. Limit locale
815# tweaks to this spot to avoid wrong language settings when running
816# make menuconfig etc.
817# Error messages still appears in the original language
818
Paul Smith4f193362006-03-05 17:14:10 -0500819PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200820$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 $(Q)$(MAKE) $(build)=$@
822
Sam Ravnborgcb584552006-01-09 21:20:34 +0100823# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100824#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400825# The KERNELRELEASE value built here is stored in the file
826# include/config/kernel.release, and is used when executing several
827# make targets, such as "make install" or "make modules_install."
828#
829# The eventual kernel release string consists of the following fields,
830# shown in a hierarchical format to show how smaller parts are concatenated
831# to form the larger and final value, with values coming from places like
832# the Makefile, kernel config options, make command line options and/or
833# SCM tag information.
834#
835# $(KERNELVERSION)
836# $(VERSION) eg, 2
837# $(PATCHLEVEL) eg, 6
838# $(SUBLEVEL) eg, 18
839# $(EXTRAVERSION) eg, -rc6
840# $(localver-full)
841# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100842# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400843# $(CONFIG_LOCALVERSION) (from kernel config setting)
844# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
845# ./scripts/setlocalversion (SCM tag, if one exists)
846# $(LOCALVERSION) (from make command line if provided)
847#
848# Note how the final $(localver-auto) string is included *only* if the
849# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
850# moment, only git is supported but other SCMs can edit the script
851# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100852
Oleg Verych76c32952007-02-06 02:18:22 +0100853pattern = ".*/localversion[^~]*"
854string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800855 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100856
Oleg Verych76c32952007-02-06 02:18:22 +0100857localver = $(subst $(space),, $(string) \
858 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200859
Sam Ravnborgcb584552006-01-09 21:20:34 +0100860# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
861# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200862# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100863#
864# Currently, only git is supported.
865# Other SCMs can edit scripts/setlocalversion and add the appropriate
866# checks as needed.
867ifdef CONFIG_LOCALVERSION_AUTO
868 _localver-auto = $(shell $(CONFIG_SHELL) \
869 $(srctree)/scripts/setlocalversion $(srctree))
870 localver-auto = $(LOCALVERSION)$(_localver-auto)
871endif
872
873localver-full = $(localver)$(localver-auto)
874
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700875# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100876kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700877include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100878 $(Q)rm -f $@
879 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100880
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200883# or the modules are listed in "prepare".
884# A multi level approach is used. prepareN is processed before prepareN-1.
885# archprepare is used in arch Makefiles and when processed asm symlink,
886# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200888# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500889PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200890
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200891# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892# and if so do:
893# 1) Check that make has not been executed in the kernel src $(srctree)
894# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700895prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896ifneq ($(KBUILD_SRC),)
897 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700898 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 echo " $(srctree) is not clean, please run 'make mrproper'";\
900 echo " in the '$(srctree)' directory.";\
901 /bin/false; \
902 fi;
903 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200904 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905endif
906
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200907# prepare2 creates a makefile if using a separate output directory
908prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Roman Zippel3eb3c742007-01-10 14:45:28 +0100910prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
911 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200912 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200914archprepare: prepare1 scripts_basic
915
916prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200917 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200918 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800921prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200923# Leave this as default for preprocessing vmlinux.lds.S, which is now
924# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
926export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
927
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200928# The asm symlink changes when $(ARCH) changes.
929# Detect this and ask user to run make mrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200931include/asm: FORCE
932 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
933 if [ -L include/asm ]; then \
934 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
935 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
936 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
937 exit 1; \
938 fi; \
939 else \
940 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
941 if [ ! -d include ]; then \
942 mkdir -p include; \
943 fi; \
944 ln -fsn asm-$(SRCARCH) $@; \
945 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947# Generate some files
948# ---------------------------------------------------------------------------
949
950# KERNELRELEASE can change from a few different places, meaning version.h
951# needs to be updated, so this check is forced on all builds
952
953uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200954define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200956 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
957 exit 1; \
958 fi; \
959 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960endef
961
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200962define filechk_version.h
963 (echo \#define LINUX_VERSION_CODE $(shell \
964 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
965 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
966endef
967
968include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 $(call filechk,version.h)
970
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200971include/linux/utsrelease.h: include/config/kernel.release FORCE
972 $(call filechk,utsrelease.h)
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974# ---------------------------------------------------------------------------
975
Paul Smith4f193362006-03-05 17:14:10 -0500976PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977depend dep:
978 @echo '*** Warning: make $@ is unnecessary now.'
979
980# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100981# Kernel headers
David Woodhouse1ab7a1f2006-09-16 12:15:55 -0700982INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100983export INSTALL_HDR_PATH
984
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200985HDRFILTER=generic i386 x86_64
986HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
David Woodhouse6d716272006-09-24 22:16:03 +0100987
988PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +0100989headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -0700990 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100991 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700992 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100993 done
994
David Woodhouse8d730cf2006-06-18 11:58:39 +0100995PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +0100996headers_install: include/linux/version.h scripts_basic FORCE
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200997 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
998 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100999 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +02001000 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001001 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +01001002
Mike Frysinger1f857122007-02-14 00:33:02 -08001003PHONY += headers_check_all
1004headers_check_all: headers_install_all
1005 $(Q)for arch in $(HDRARCHES); do \
1006 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1007 done
1008
David Woodhouse68475352006-06-18 12:02:10 +01001009PHONY += headers_check
1010headers_check: headers_install
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001011 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001012
David Woodhouse8d730cf2006-06-18 11:58:39 +01001013# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014# Modules
1015
1016ifdef CONFIG_MODULES
1017
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001018# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
1020all: modules
1021
1022# Build modules
1023
Paul Smith4f193362006-03-05 17:14:10 -05001024PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1026 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001027 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
1029
1030# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001031PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001032modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001035PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036modules_install: _modinst_ _modinst_post
1037
Paul Smith4f193362006-03-05 17:14:10 -05001038PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001040 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 echo "Warning: you may need to install module-init-tools"; \
1042 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1043 sleep 1; \
1044 fi
1045 @rm -rf $(MODLIB)/kernel
1046 @rm -f $(MODLIB)/source
1047 @mkdir -p $(MODLIB)/kernel
1048 @ln -s $(srctree) $(MODLIB)/source
1049 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1050 rm -f $(MODLIB)/build ; \
1051 ln -s $(objtree) $(MODLIB)/build ; \
1052 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001053 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001055# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056# boot a modules.dep even before / is mounted read-write. However the
1057# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059_modinst_post: _modinst_
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001060 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062else # CONFIG_MODULES
1063
1064# Modules not configured
1065# ---------------------------------------------------------------------------
1066
1067modules modules_install: FORCE
1068 @echo
1069 @echo "The present kernel configuration has modules disabled."
1070 @echo "Type 'make config' and enable loadable module support."
1071 @echo "Then build a kernel with module support enabled."
1072 @echo
1073 @exit 1
1074
1075endif # CONFIG_MODULES
1076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077###
1078# Cleaning is done on three levels.
1079# make clean Delete most generated files
1080# Leave enough to build external modules
1081# make mrproper Delete the current configuration, and all generated files
1082# make distclean Remove editor backup files, patch leftover files and the like
1083
1084# Directories & files removed with 'make clean'
1085CLEAN_DIRS += $(MODVERDIR)
1086CLEAN_FILES += vmlinux System.map \
1087 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1088
1089# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001090MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001091MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001092 include/linux/autoconf.h include/linux/version.h \
1093 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001094 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
1096# clean - Delete most, but leave enough to build external modules
1097#
1098clean: rm-dirs := $(CLEAN_DIRS)
1099clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001100clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103$(clean-dirs):
1104 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1105
1106clean: archclean $(clean-dirs)
1107 $(call cmd,rmdirs)
1108 $(call cmd,rmfiles)
1109 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001110 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001111 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1112 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 -type f -print | xargs rm -f
1114
1115# mrproper - Delete all generated files, including .config
1116#
1117mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1118mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1119mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1120
Paul Smith4f193362006-03-05 17:14:10 -05001121PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122$(mrproper-dirs):
1123 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1124
1125mrproper: clean archmrproper $(mrproper-dirs)
1126 $(call cmd,rmdirs)
1127 $(call cmd,rmfiles)
1128
1129# distclean
1130#
Paul Smith4f193362006-03-05 17:14:10 -05001131PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133distclean: mrproper
1134 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001135 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001137 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1139 -type f -print | xargs rm -f
1140
1141
1142# Packaging of the kernel to various formats
1143# ---------------------------------------------------------------------------
1144# rpm target kept for backward compatibility
1145package-dir := $(srctree)/scripts/package
1146
Zach Brown031ecc62006-06-08 22:12:37 -07001147%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001148 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001149rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001150 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152
1153# Brief documentation of the typical targets used
1154# ---------------------------------------------------------------------------
1155
1156boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1157boards := $(notdir $(boards))
1158
1159help:
1160 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001161 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001162 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001163 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001164 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 @echo ''
1166 @echo 'Configuration targets:'
1167 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1168 @echo ''
1169 @echo 'Other generic targets:'
1170 @echo ' all - Build all targets marked with [*]'
1171 @echo '* vmlinux - Build the bare kernel'
1172 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001173 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 @echo ' dir/ - Build all files in dir and below'
1175 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001176 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 @echo ' rpm - Build a kernel as an RPM package'
1178 @echo ' tags/TAGS - Generate tags file for editors'
1179 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001180 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001181 @echo ' kernelversion - Output the version stored in Makefile'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001182 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001183 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001184 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001185 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 @echo ''
1187 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 @echo ' checkstack - Generate a list of stack hogs'
1189 @echo ' namespacecheck - Name space analysis on compiled kernel'
Adrian Bunk295ac052007-08-24 23:04:56 +02001190 @echo ' export_report - List the usages of all exported symbols'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001191 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001192 echo ' headers_check - Sanity check on exported headers'; \
1193 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 @echo ''
1195 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001196 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 @echo ''
1198 @echo 'Documentation targets:'
1199 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1200 @echo ''
1201 @echo 'Architecture specific targets ($(ARCH)):'
1202 @$(if $(archhelp),$(archhelp),\
1203 echo ' No architecture specific help defined for $(ARCH)')
1204 @echo ''
1205 @$(if $(boards), \
1206 $(foreach b, $(boards), \
1207 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1208 echo '')
1209
1210 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001211 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001213 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1214 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 @echo ''
1216 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1217 @echo 'For further info see the ./README file'
1218
1219
1220# Documentation targets
1221# ---------------------------------------------------------------------------
1222%docs: scripts_basic FORCE
1223 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1224
1225else # KBUILD_EXTMOD
1226
1227###
1228# External module support.
1229# When building external modules the kernel used as basis is considered
1230# read-only, and no consistency checks are made and the make
1231# system is not used on the basis kernel. If updates are required
1232# in the basis kernel ordinary make commands (without M=...) must
1233# be used.
1234#
1235# The following are the only valid targets when building external
1236# modules.
1237# make M=dir clean Delete all automatically generated files
1238# make M=dir modules Make all modules in specified dir
1239# make M=dir Same as 'make M=dir modules'
1240# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001241# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242# Assumes install directory is already created
1243
1244# We are always building modules
1245KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001246PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001248 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Paul Smith4f193362006-03-05 17:14:10 -05001250PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251$(objtree)/Module.symvers:
1252 @test -e $(objtree)/Module.symvers || ( \
1253 echo; \
1254 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1255 echo " is missing; modules will have no dependencies and modversions."; \
1256 echo )
1257
1258module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001259PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260$(module-dirs): crmodverdir $(objtree)/Module.symvers
1261 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1262
1263modules: $(module-dirs)
1264 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001265 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
Paul Smith4f193362006-03-05 17:14:10 -05001267PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001268modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001269
Paul Smith4f193362006-03-05 17:14:10 -05001270install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1271PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001272_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001273 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001274 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Paul Smith4f193362006-03-05 17:14:10 -05001276PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001277_emodinst_post: _emodinst_
1278 $(call cmd,depmod)
1279
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1281
Paul Smith4f193362006-03-05 17:14:10 -05001282PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283$(clean-dirs):
1284 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1285
1286clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001287clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288clean: $(clean-dirs)
1289 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001290 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001292 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1294 -type f -print | xargs rm -f
1295
1296help:
1297 @echo ' Building external modules.'
1298 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1299 @echo ''
1300 @echo ' modules - default target, build the module(s)'
1301 @echo ' modules_install - install the module'
1302 @echo ' clean - remove generated files in module directory only'
1303 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001304
1305# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001306PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001307prepare: ;
1308scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309endif # KBUILD_EXTMOD
1310
1311# Generate tags for editors
1312# ---------------------------------------------------------------------------
1313
1314#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1315#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1316#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1317
George Anzingerf182ae62005-07-07 17:56:06 -07001318ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319__srctree =
1320else
1321__srctree = $(srctree)/
1322endif
1323
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001324ifeq ($(ALLSOURCE_ARCHS),)
1325ifeq ($(ARCH),um)
1326ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1327else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001328ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001329endif
1330else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001331#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001332ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1333endif
1334
Thomas Gleixnerd0974b12007-11-15 07:11:12 +01001335ALLSOURCE_ARCHS := $(SRCARCH)
Ian Campbella0674e82005-06-23 11:25:54 +01001336
Masatake YAMATOe838db62006-06-22 12:21:20 +09001337define find-sources
Yinghai Luf8bea582007-10-16 00:28:06 -07001338 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1339 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001340 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001341 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001343 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 find $(__srctree)include $(RCS_FIND_IGNORE) \
1345 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001346 -o -name $1 -print; \
Yinghai Luf8bea582007-10-16 00:28:06 -07001347 for arch in $(ALLINCLUDE_ARCHS) ; do \
1348 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001349 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001350 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001352 -name $1 -print; \
1353 find $(__srctree) $(RCS_FIND_IGNORE) \
Yinghai Lu37ab7a22007-10-17 16:43:39 -07001354 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001355 -name $1 -print; \
1356 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001357endef
1358
1359define all-sources
1360 $(call find-sources,'*.[chS]')
1361endef
1362define all-kconfigs
1363 $(call find-sources,'Kconfig*')
1364endef
1365define all-defconfigs
1366 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367endef
1368
Aron Griffisda7c0402006-09-21 00:27:02 -04001369define xtags
1370 if $1 --version 2>&1 | grep -iq exuberant; then \
1371 $(all-sources) | xargs $1 -a \
1372 -I __initdata,__exitdata,__acquires,__releases \
1373 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001374 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001375 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001376 $(all-kconfigs) | xargs $1 -a \
1377 --langdef=kconfig \
1378 --language-force=kconfig \
1379 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001380 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001381 --langdef=dotconfig \
1382 --language-force=dotconfig \
1383 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1384 elif $1 --version 2>&1 | grep -iq emacs; then \
1385 $(all-sources) | xargs $1 -a; \
1386 $(all-kconfigs) | xargs $1 -a \
1387 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001388 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001389 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1390 else \
1391 $(all-sources) | xargs $1 -a; \
1392 fi
1393endef
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001396 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
1398quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001399 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401cscope: FORCE
1402 $(call cmd,cscope-file)
1403 $(call cmd,cscope)
1404
1405quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001406define cmd_TAGS
1407 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001408 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001409endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001411TAGS: FORCE
1412 $(call cmd,TAGS)
1413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414quiet_cmd_tags = MAKE $@
1415define cmd_tags
1416 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001417 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418endef
1419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420tags: FORCE
1421 $(call cmd,tags)
1422
1423
1424# Scripts to check various things for consistency
1425# ---------------------------------------------------------------------------
1426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427includecheck:
1428 find * $(RCS_FIND_IGNORE) \
1429 -name '*.[hcS]' -type f -print | sort \
1430 | xargs $(PERL) -w scripts/checkincludes.pl
1431
1432versioncheck:
1433 find * $(RCS_FIND_IGNORE) \
1434 -name '*.[hcS]' -type f -print | sort \
1435 | xargs $(PERL) -w scripts/checkversion.pl
1436
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437namespacecheck:
1438 $(PERL) $(srctree)/scripts/namespace.pl
1439
Adrian Bunk295ac052007-08-24 23:04:56 +02001440export_report:
1441 $(PERL) $(srctree)/scripts/export_report.pl
1442
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443endif #ifeq ($(config-targets),1)
1444endif #ifeq ($(mixed-targets),1)
1445
Roman Zippelc30a02e2006-06-08 22:12:50 -07001446PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001447
Jeff Dike011e3a92006-12-13 00:34:12 -08001448# UML needs a little special treatment here. It wants to use the host
1449# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1450# else wants $(ARCH), including people doing cross-builds, which means
1451# that $(SUBARCH) doesn't work here.
1452ifeq ($(ARCH), um)
1453CHECKSTACK_ARCH := $(SUBARCH)
1454else
1455CHECKSTACK_ARCH := $(ARCH)
1456endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457checkstack:
1458 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001459 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
1461kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001462 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1463 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001464kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001465 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466
Sam Ravnborg06300b22006-01-25 07:13:18 +01001467# Single targets
1468# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001469# Single targets are compatible with:
1470# - build whith mixed source and output
1471# - build with separate output dir 'make O=...'
1472# - external modules
1473#
1474# target-dir => where to store outputfile
1475# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001476
Sam Ravnborg06300b22006-01-25 07:13:18 +01001477ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001478 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001479 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001480else
1481 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001482 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1483 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001484endif
1485
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001486%.s: %.c prepare scripts FORCE
1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1488%.i: %.c prepare scripts FORCE
1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1490%.o: %.c prepare scripts FORCE
1491 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1492%.lst: %.c prepare scripts FORCE
1493 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1494%.s: %.S prepare scripts FORCE
1495 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1496%.o: %.S prepare scripts FORCE
1497 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001498%.symtypes: %.c prepare scripts FORCE
1499 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001500
1501# Modules
1502/ %/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001503 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001504 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001505 $(build)=$(build-dir)
1506%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001507 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001508 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001509 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001510 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512# FIXME Should go into a make.lib or something
1513# ===========================================================================
1514
1515quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1516 cmd_rmdirs = rm -rf $(rm-dirs)
1517
1518quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1519 cmd_rmfiles = rm -f $(rm-files)
1520
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001521# Run depmod only is we have System.map and depmod is executable
1522# and we build for the host arch
1523quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1524 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001525 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001526 $(DEPMOD) -ae -F System.map \
1527 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1528 $(KERNELRELEASE); \
1529 fi
1530
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001531# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001532# clean it up only when building all modules
1533cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1534 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Sam Ravnborg222d3942007-10-15 21:59:31 +02001536a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg06c50402007-10-15 22:17:25 +02001537 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001538 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
1540quiet_cmd_as_o_S = AS $@
1541cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1542
1543# read all saved command lines
1544
1545targets := $(wildcard $(sort $(targets)))
1546cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1547
1548ifneq ($(cmd_files),)
1549 $(cmd_files): ; # Do not try to update included dependency files
1550 include $(cmd_files)
1551endif
1552
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1554# Usage:
1555# $(Q)$(MAKE) $(clean)=dir
1556clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1557
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558endif # skip-makefile
1559
Paul Smith4f193362006-03-05 17:14:10 -05001560PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001562
Oleg Verych15964862006-12-10 02:18:40 -08001563# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1564Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001565
1566# Declare the contents of the .PHONY variable as phony. We keep that
1567# information in a variable se we can use it in if_changed and friends.
1568.PHONY: $(PHONY)