blob: 1564577bdc5386dd9a9f2856ef244303ac302436 [file] [log] [blame]
John Rigby137e9592008-07-09 14:54:02 -06001FRED=42
Linus Torvalds1da177e2005-04-16 15:20:36 -07002VERSION = 2
3PATCHLEVEL = 6
Linus Torvalds2ddcca32008-05-03 11:59:44 -07004SUBLEVEL = 26
Linus Torvaldsbce7f792008-07-13 14:51:29 -07005EXTRAVERSION =
Linus Torvalds5dd34572008-06-12 14:22:24 -07006NAME = Rotary Wombat
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8# *DOCUMENTATION*
9# To see a list of typical targets execute "make help"
10# More info can be located in ./README
11# Comments in this file are targeted only to the developer, do not
12# expect to learn how to build the kernel reading this file.
13
Oleg Verych15964862006-12-10 02:18:40 -080014# Do not:
15# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010016# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080017# o print "Entering directory ...";
18MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20# We are using a recursive build, so we need to do a little thinking
21# to get the ordering right.
22#
23# Most importantly: sub-Makefiles should only ever modify files in
24# their own directory. If in some directory we have a dependency on
25# a file in another dir (which doesn't happen often, but it's often
26# unavoidable when linking the built-in.o targets which finally
27# turn into vmlinux), we will call a sub make in that other dir, and
28# after that we are sure that everything which is in that other dir
29# is now up to date.
30#
31# The only cases where we need to modify files which have global
32# effects are thus separated out and done before the recursive
33# descending is started. They are now explicitly listed as the
34# prepare rule.
35
36# To put more focus on warnings, be less verbose as default
37# Use 'make V=1' to see the full commands
38
39ifdef V
40 ifeq ("$(origin V)", "command line")
41 KBUILD_VERBOSE = $(V)
42 endif
43endif
44ifndef KBUILD_VERBOSE
45 KBUILD_VERBOSE = 0
46endif
47
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040048# Call a source code checker (by default, "sparse") as part of the
49# C compilation.
50#
51# Use 'make C=1' to enable checking of only re-compiled files.
52# Use 'make C=2' to enable checking of *all* source files, regardless
53# of whether they are re-compiled or not.
54#
55# See the file "Documentation/sparse.txt" for more details, including
56# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58ifdef C
59 ifeq ("$(origin C)", "command line")
60 KBUILD_CHECKSRC = $(C)
61 endif
62endif
63ifndef KBUILD_CHECKSRC
64 KBUILD_CHECKSRC = 0
65endif
66
67# Use make M=dir to specify directory of external module to build
68# Old syntax make ... SUBDIRS=$PWD is still supported
69# Setting the environment variable KBUILD_EXTMOD take precedence
70ifdef SUBDIRS
71 KBUILD_EXTMOD ?= $(SUBDIRS)
72endif
73ifdef M
74 ifeq ("$(origin M)", "command line")
75 KBUILD_EXTMOD := $(M)
76 endif
77endif
78
79
80# kbuild supports saving output files in a separate directory.
81# To locate output files in a separate directory two syntaxes are supported.
82# In both cases the working directory must be the root of the kernel src.
83# 1) O=
84# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020085#
Linus Torvalds1da177e2005-04-16 15:20:36 -070086# 2) Set KBUILD_OUTPUT
87# Set the environment variable KBUILD_OUTPUT to point to the directory
88# where the output files shall be placed.
89# export KBUILD_OUTPUT=dir/to/store/output/files/
90# make
91#
92# The O= assignment takes precedence over the KBUILD_OUTPUT environment
93# variable.
94
95
96# KBUILD_SRC is set on invocation of make in OBJ directory
97# KBUILD_SRC is not intended to be used by the regular user (for now)
98ifeq ($(KBUILD_SRC),)
99
100# OK, Make called in directory where kernel src resides
101# Do we want to locate output files in a separate directory?
102ifdef O
103 ifeq ("$(origin O)", "command line")
104 KBUILD_OUTPUT := $(O)
105 endif
106endif
107
108# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500109PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110_all:
111
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100112# Cancel implicit rules on top Makefile
113$(CURDIR)/Makefile Makefile: ;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115ifneq ($(KBUILD_OUTPUT),)
116# Invoke a second make in the output directory, passing relevant variables
117# check that the output directory actually exists
118saved-output := $(KBUILD_OUTPUT)
119KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
120$(if $(KBUILD_OUTPUT),, \
121 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Milton Miller0b357862007-09-21 18:09:02 -0500123PHONY += $(MAKECMDGOALS) sub-make
124
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100125$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500126 $(Q)@:
127
128sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200129 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
130 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500131 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
132 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134# Leave processing to above invocation of make
135skip-makefile := 1
136endif # ifneq ($(KBUILD_OUTPUT),)
137endif # ifeq ($(KBUILD_SRC),)
138
139# We process the rest of the Makefile if this is the final invocation of make
140ifeq ($(skip-makefile),)
141
142# If building an external module we do not care about the all: rule
143# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500144PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145ifeq ($(KBUILD_EXTMOD),)
146_all: all
147else
148_all: modules
149endif
150
151srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
152TOPDIR := $(srctree)
153# FIXME - TOPDIR is obsolete, use srctree/objtree
154objtree := $(CURDIR)
155src := $(srctree)
156obj := $(objtree)
157
Mattia Dongili0f558c32006-02-19 13:50:37 +0100158VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160export srctree objtree VPATH TOPDIR
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163# SUBARCH tells the usermode build what the underlying arch is. That is set
164# first, and if a usermode build is happening, the "ARCH=um" on the command
165# line overrides the setting of ARCH below. If a native build is happening,
166# then ARCH is assigned, getting whatever value it gets normally, and
167# SUBARCH is subsequently ignored.
168
169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt12760cb2007-11-23 14:24:25 +0900173 -e s/sh.*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175# Cross compiling and selecting different set of gcc/bin-utils
176# ---------------------------------------------------------------------------
177#
178# When performing cross compilation for other architectures ARCH shall be set
179# to the target architecture. (See arch/* for the possibilities).
180# ARCH can be set during invocation of make:
181# make ARCH=ia64
182# Another way is to have ARCH set in the environment.
183# The default ARCH is the host where make is executed.
184
185# CROSS_COMPILE specify the prefix used for all executables used
186# during compilation. Only gcc and related bin-utils executables
187# are prefixed with $(CROSS_COMPILE).
188# CROSS_COMPILE can be set on the command line
189# make CROSS_COMPILE=ia64-linux-
190# Alternatively CROSS_COMPILE can be set in the environment.
191# Default value for CROSS_COMPILE is not to prefix executables
192# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100193export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194ARCH ?= $(SUBARCH)
195CROSS_COMPILE ?=
196
197# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200198UTS_MACHINE := $(ARCH)
199SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Sam Ravnborgd746d642007-11-12 20:14:19 +0100201# Additional ARCH settings for x86
202ifeq ($(ARCH),i386)
203 SRCARCH := x86
204endif
205ifeq ($(ARCH),x86_64)
206 SRCARCH := x86
207endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200208
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700209KCONFIG_CONFIG ?= .config
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211# SHELL used by kbuild
212CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
213 else if [ -x /bin/bash ]; then echo /bin/bash; \
214 else echo sh; fi ; fi)
215
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200216HOSTCC = gcc
217HOSTCXX = g++
218HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
219HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200221# Decide whether to build built-in, modular, or both.
222# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224KBUILD_MODULES :=
225KBUILD_BUILTIN := 1
226
227# If we have only "make modules", don't compile built-in objects.
228# When we're building modules with modversions, we need to consider
229# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200230# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232ifeq ($(MAKECMDGOALS),modules)
233 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
234endif
235
236# If we have "make <whatever> modules", compile modules
237# in addition to whatever we do anyway.
238# Just "make" or "make all" shall build modules as well
239
240ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
241 KBUILD_MODULES := 1
242endif
243
244ifeq ($(MAKECMDGOALS),)
245 KBUILD_MODULES := 1
246endif
247
Sam Ravnborge579d352005-07-27 08:10:10 +0200248export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
250
251# Beautify output
252# ---------------------------------------------------------------------------
253#
254# Normally, we echo the whole command before executing it. By making
255# that echo $($(quiet)$(cmd)), we now have the possibility to set
256# $(quiet) to choose other forms of output instead, e.g.
257#
258# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
259# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
260#
261# If $(quiet) is empty, the whole command will be printed.
262# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200263# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264# the variable $(silent_cmd_cc_o_c) doesn't exist.
265#
Adrian Bunka58a4142006-01-10 00:08:17 +0100266# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267# for commands that shall be hidden in non-verbose mode.
268#
269# $(Q)ln $@ :<
270#
271# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
272# If KBUILD_VERBOSE equals 1 then the above command is displayed.
273
274ifeq ($(KBUILD_VERBOSE),1)
275 quiet =
276 Q =
277else
278 quiet=quiet_
279 Q = @
280endif
281
282# If the user is running make -s (silent mode), suppress echoing of
283# commands
284
285ifneq ($(findstring s,$(MAKEFLAGS)),)
286 quiet=silent_
287endif
288
289export quiet Q KBUILD_VERBOSE
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292# Look for make include files relative to root of kernel src
293MAKEFLAGS += --include-dir=$(srctree)
294
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100295# We need some generic definitions (do not try to remake the file).
296$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800297include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
299# Make variables (CC, etc...)
300
301AS = $(CROSS_COMPILE)as
302LD = $(CROSS_COMPILE)ld
303CC = $(CROSS_COMPILE)gcc
304CPP = $(CC) -E
305AR = $(CROSS_COMPILE)ar
306NM = $(CROSS_COMPILE)nm
307STRIP = $(CROSS_COMPILE)strip
308OBJCOPY = $(CROSS_COMPILE)objcopy
309OBJDUMP = $(CROSS_COMPILE)objdump
310AWK = awk
311GENKSYMS = scripts/genksyms/genksyms
312DEPMOD = /sbin/depmod
313KALLSYMS = scripts/kallsyms
314PERL = perl
315CHECK = sparse
316
Al Viroaf4ca452005-10-21 02:55:38 -0400317CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318MODFLAGS = -DMODULE
319CFLAGS_MODULE = $(MODFLAGS)
320AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700321LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322CFLAGS_KERNEL =
323AFLAGS_KERNEL =
324
325
326# Use LINUXINCLUDE when you must reference the include/ directory.
327# Needed to be compatible with the O= option
328LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100329 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800330 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Sam Ravnborg06c50402007-10-15 22:17:25 +0200332KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200334KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700335 -fno-strict-aliasing -fno-common \
336 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200337KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700339# Read KERNELRELEASE from include/config/kernel.release (if it exists)
340KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100341KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100342
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200343export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100344export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200345export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
346export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Sam Ravnborg06c50402007-10-15 22:17:25 +0200348export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200349export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200350export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352# When compiling out-of-tree modules, put MODVERDIR in the module
353# tree rather than in the kernel tree. The kernel tree might
354# even be read-only.
355export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357# Files to ignore in find ... statements
358
Trond Myklebust406119f2005-10-27 14:46:53 -0400359RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
360export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362# ===========================================================================
363# Rules shared between *config targets and build targets
364
365# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500366PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367scripts_basic:
368 $(Q)$(MAKE) $(build)=scripts/basic
369
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200370# To avoid any implicit rule to kick in, define an empty command.
371scripts/basic/%: scripts_basic ;
372
Paul Smith4f193362006-03-05 17:14:10 -0500373PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200374# outputmakefile generates a Makefile in the output directory, if using a
375# separate output directory. This allows convenient use of make in the
376# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200378ifneq ($(KBUILD_SRC),)
379 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
380 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
381endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383# To make sure we do not include .config for any of the *config targets
384# catch them early, and hand them over to scripts/kconfig/Makefile
385# It is allowed to specify more targets when calling make, including
386# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200387# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388# Detect when mixed targets is specified, and make a second invocation
389# of make so .config is not included in this case either (for *config).
390
Roman Zippel3eb3c742007-01-10 14:45:28 +0100391no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700392 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100393 include/linux/version.h headers_% \
394 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396config-targets := 0
397mixed-targets := 0
398dot-config := 1
399
400ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
402 dot-config := 0
403 endif
404endif
405
406ifeq ($(KBUILD_EXTMOD),)
407 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
408 config-targets := 1
409 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
410 mixed-targets := 1
411 endif
412 endif
413endif
414
415ifeq ($(mixed-targets),1)
416# ===========================================================================
417# We're called with mixed targets (*config and build targets).
418# Handle them one by one.
419
420%:: FORCE
421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
422
423else
424ifeq ($(config-targets),1)
425# ===========================================================================
426# *config targets only - make sure prerequisites are updated, and descend
427# in scripts/kconfig to make the *config target
428
429# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
430# KBUILD_DEFCONFIG may point out an alternative default configuration
431# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200432include $(srctree)/arch/$(SRCARCH)/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433export KBUILD_DEFCONFIG
434
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200435config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700436 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 $(Q)$(MAKE) $(build)=scripts/kconfig $@
438
439else
440# ===========================================================================
441# Build targets only - this includes vmlinux, arch specific targets, clean
442# targets and others. In general all targets except *config targets.
443
444ifeq ($(KBUILD_EXTMOD),)
445# Additional helpers built in scripts/
446# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200447# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500448PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700449scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 $(Q)$(MAKE) $(build)=$(@)
451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452# Objects we will link into vmlinux / subdirs we need to visit
453init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100454drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455net-y := net/
456libs-y := lib/
457core-y := usr/
458endif # KBUILD_EXTMOD
459
460ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200461# Read in config
462-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200464ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465# Read in dependencies to all Kconfig* files, make sure to run
466# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700467-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700470$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Roman Zippelc955cca2006-06-08 22:12:39 -0700472# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100473# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200474# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100475# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700476include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
478else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200479# external modules needs include/linux/autoconf.h and include/config/auto.conf
480# but do not care if they are up-to-date. Use auto.conf to trigger the test
481PHONY += include/config/auto.conf
482
483include/config/auto.conf:
484 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
485 echo; \
486 echo " ERROR: Kernel configuration is invalid."; \
487 echo " include/linux/autoconf.h or $@ are missing."; \
488 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
489 echo; \
490 /bin/false)
491
492endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494else
495# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700496include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200497endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499# The all: target is the default when no target is given on the
500# command line.
501# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200502# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503all: vmlinux
504
505ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200506KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200508KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509endif
510
Ralf Baechlebef5b542008-07-16 13:02:24 +0100511include $(srctree)/arch/$(SRCARCH)/Makefile
512
Andi Kleen35bb5b12008-02-22 15:15:03 +0100513ifneq (CONFIG_FRAME_WARN,0)
514KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
515endif
516
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100517# Force gcc to behave correct even for buggy distributions
518# Arch Makefiles may override this setting
519KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200522KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200524KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525endif
526
527ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200528KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200529KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530endif
531
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200532ifdef CONFIG_FTRACE
533KBUILD_CFLAGS += -pg
534endif
535
Sam Ravnborg91341d42008-01-21 21:31:44 +0100536# We trigger additional mismatches with less inlining
537ifdef CONFIG_DEBUG_SECTION_MISMATCH
538KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
539endif
540
Sam Ravnborge8e69932005-04-30 16:51:42 -0700541# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700542NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700543CHECKFLAGS += $(NOSTDINC_FLAGS)
544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200546KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200548# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200549KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Sam Ravnborg06c50402007-10-15 22:17:25 +0200551# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100552# But warn user when we do so
553warn-assign = \
554$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
555
556ifneq ($(KCPPFLAGS),)
557 $(call warn-assign,CPPFLAGS)
558 KBUILD_CPPFLAGS += $(KCPPFLAGS)
559endif
560ifneq ($(KAFLAGS),)
561 $(call warn-assign,AFLAGS)
562 KBUILD_AFLAGS += $(KAFLAGS)
563endif
564ifneq ($(KCFLAGS),)
565 $(call warn-assign,CFLAGS)
566 KBUILD_CFLAGS += $(KCFLAGS)
567endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200568
Roland McGrath18991192007-07-19 01:48:40 -0700569# Use --build-id when available.
570LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
571 $(call ld-option, -Wl$(comma)--build-id,))
572LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
573LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200576# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577# set in the environment
578# Also any assignments in arch/$(ARCH)/Makefile take precedence over
579# this default value
580export KBUILD_IMAGE ?= vmlinux
581
582#
583# INSTALL_PATH specifies where to place the updated kernel and system map
584# images. Default is /boot, but you can set it to other values
585export INSTALL_PATH ?= /boot
586
587#
588# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
589# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200590# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591#
592
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100593MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594export MODLIB
595
Theodore Ts'oac031f22006-06-21 20:53:09 -0400596#
597# INSTALL_MOD_STRIP, if defined, will cause modules to be
598# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
599# the default option --strip-debug will be used. Otherwise,
600# INSTALL_MOD_STRIP will used as the options to the strip command.
601
602ifdef INSTALL_MOD_STRIP
603ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200604mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400605else
606mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
607endif # INSTALL_MOD_STRIP=1
608else
609mod_strip_cmd = true
610endif # INSTALL_MOD_STRIP
611export mod_strip_cmd
612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100615core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
618 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
619 $(net-y) $(net-m) $(libs-y) $(libs-m)))
620
621vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
622 $(init-n) $(init-) \
623 $(core-n) $(core-) $(drivers-n) $(drivers-) \
624 $(net-n) $(net-) $(libs-n) $(libs-))))
625
626init-y := $(patsubst %/, %/built-in.o, $(init-y))
627core-y := $(patsubst %/, %/built-in.o, $(core-y))
628drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
629net-y := $(patsubst %/, %/built-in.o, $(net-y))
630libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
631libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
632libs-y := $(libs-y1) $(libs-y2)
633
634# Build vmlinux
635# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200636# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200638# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639# Ordering when linking is important, and $(vmlinux-init) must be first.
640#
641# vmlinux
642# ^
643# |
644# +-< $(vmlinux-init)
645# | +--< init/version.o + more
646# |
647# +--< $(vmlinux-main)
648# | +--< driver/built-in.o mm/built-in.o + more
649# |
650# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
651#
652# vmlinux version (uname -v) cannot be updated during normal
653# descending-into-subdirs phase since we do not yet know if we need to
654# update vmlinux.
655# Therefore this step is delayed until just before final link of vmlinux -
656# except in the kallsyms case where it is done just before adding the
657# symbols to the kernel.
658#
659# System.map is generated to document addresses of all kernel symbols
660
661vmlinux-init := $(head-y) $(init-y)
662vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
663vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200664vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100665export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667# Rule to link vmlinux - also used during CONFIG_KALLSYMS
668# May be overridden by arch/$(ARCH)/Makefile
669quiet_cmd_vmlinux__ ?= LD $@
670 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
671 -T $(vmlinux-lds) $(vmlinux-init) \
672 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200673 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
675# Generate new vmlinux version
676quiet_cmd_vmlinux_version = GEN .version
677 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200678 if [ ! -r .version ]; then \
679 rm -f .version; \
680 echo 1 >.version; \
681 else \
682 mv .version .old_version; \
683 expr 0$$(cat .old_version) + 1 >.version; \
684 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 $(MAKE) $(build)=init
686
687# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200688quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
690
691# Link of vmlinux
692# If CONFIG_KALLSYMS is set .version is already updated
693# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700694# Use + in front of the vmlinux_version rule to silent warning with make -j2
695# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700697 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
699
700 $(call cmd,vmlinux__)
701 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
702
Sam Ravnborg46352812006-08-08 21:41:18 +0200703 $(Q)$(if $($(quiet)cmd_sysmap), \
704 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
705 $(cmd_sysmap) $@ System.map; \
706 if [ $$? -ne 0 ]; then \
707 rm -f $@; \
708 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 fi;
710 $(verify_kallsyms)
711endef
712
713
714ifdef CONFIG_KALLSYMS
715# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
716# It's a three stage process:
717# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
718# empty
719# Running kallsyms on that gives us .tmp_kallsyms1.o with
720# the right size - vmlinux version (uname -v) is updated during this step
721# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
722# but due to the added section, some addresses have shifted.
723# From here, we generate a correct .tmp_kallsyms2.o
724# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
725# o Verify that the System.map from vmlinux matches the map from
726# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
727# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
728# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
729# temporary bypass to allow the kernel to be built while the
730# maintainers work out what went wrong with kallsyms.
731
732ifdef CONFIG_KALLSYMS_EXTRA_PASS
733last_kallsyms := 3
734else
735last_kallsyms := 2
736endif
737
738kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
739
740define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200741 $(Q)$(if $($(quiet)cmd_sysmap), \
742 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200744 $(Q)cmp -s System.map .tmp_System.map || \
745 (echo Inconsistent kallsyms data; \
746 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 rm .tmp_kallsyms* ; /bin/false )
748endef
749
750# Update vmlinux version before link
751# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200752# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753cmd_ksym_ld = $(cmd_vmlinux__)
754define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200755 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 +$(call cmd,vmlinux_version)
757 $(call cmd,vmlinux__)
758 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
759endef
760
761# Generate .S file with all kernel symbols
762quiet_cmd_kallsyms = KSYM $@
763 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
764 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
765
766.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
767 $(call if_changed_dep,as_o_S)
768
769.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
770 $(call cmd,kallsyms)
771
772# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
773.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
774 $(call if_changed_rule,ksym_ld)
775
776.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
777 $(call if_changed,vmlinux__)
778
779.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
780 $(call if_changed,vmlinux__)
781
782# Needs to visit scripts/ before $(KALLSYMS) can be used.
783$(KALLSYMS): scripts ;
784
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000785# Generate some data for debugging strange kallsyms problems
786debug_kallsyms: .tmp_map$(last_kallsyms)
787
788.tmp_map%: .tmp_vmlinux% FORCE
789 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
790
791.tmp_map3: .tmp_map2
792
793.tmp_map2: .tmp_map1
794
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795endif # ifdef CONFIG_KALLSYMS
796
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200797# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
798# relevant sections renamed as per the linker script.
799quiet_cmd_vmlinux-modpost = LD $@
800 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
801 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200802 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200803define rule_vmlinux-modpost
804 :
805 +$(call cmd,vmlinux-modpost)
806 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
807 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
808endef
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100811vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700812ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100813 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700814endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700815ifdef CONFIG_SAMPLES
816 $(Q)$(MAKE) $(build)=samples
817endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200818 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200820 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
Sam Ravnborg310f8242008-01-21 22:57:09 +0100822# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100823ifdef CONFIG_KALLSYMS
824.tmp_vmlinux1: vmlinux.o
825endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200826
827modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
828vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200829 $(call if_changed_rule,vmlinux-modpost)
830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831# The actual objects are generated when descending,
832# make sure no implicit rule kicks in
833$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
834
835# Handle descending into subdirectories listed in $(vmlinux-dirs)
836# Preset locale variables to speed up the build process. Limit locale
837# tweaks to this spot to avoid wrong language settings when running
838# make menuconfig etc.
839# Error messages still appears in the original language
840
Paul Smith4f193362006-03-05 17:14:10 -0500841PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200842$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 $(Q)$(MAKE) $(build)=$@
844
Sam Ravnborgcb584552006-01-09 21:20:34 +0100845# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100846#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400847# The KERNELRELEASE value built here is stored in the file
848# include/config/kernel.release, and is used when executing several
849# make targets, such as "make install" or "make modules_install."
850#
851# The eventual kernel release string consists of the following fields,
852# shown in a hierarchical format to show how smaller parts are concatenated
853# to form the larger and final value, with values coming from places like
854# the Makefile, kernel config options, make command line options and/or
855# SCM tag information.
856#
857# $(KERNELVERSION)
858# $(VERSION) eg, 2
859# $(PATCHLEVEL) eg, 6
860# $(SUBLEVEL) eg, 18
861# $(EXTRAVERSION) eg, -rc6
862# $(localver-full)
863# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100864# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400865# $(CONFIG_LOCALVERSION) (from kernel config setting)
866# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
867# ./scripts/setlocalversion (SCM tag, if one exists)
868# $(LOCALVERSION) (from make command line if provided)
869#
870# Note how the final $(localver-auto) string is included *only* if the
871# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
872# moment, only git is supported but other SCMs can edit the script
873# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100874
Oleg Verych76c32952007-02-06 02:18:22 +0100875pattern = ".*/localversion[^~]*"
876string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800877 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100878
Oleg Verych76c32952007-02-06 02:18:22 +0100879localver = $(subst $(space),, $(string) \
880 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200881
Sam Ravnborgcb584552006-01-09 21:20:34 +0100882# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
883# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200884# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100885#
886# Currently, only git is supported.
887# Other SCMs can edit scripts/setlocalversion and add the appropriate
888# checks as needed.
889ifdef CONFIG_LOCALVERSION_AUTO
890 _localver-auto = $(shell $(CONFIG_SHELL) \
891 $(srctree)/scripts/setlocalversion $(srctree))
892 localver-auto = $(LOCALVERSION)$(_localver-auto)
893endif
894
895localver-full = $(localver)$(localver-auto)
896
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700897# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100898kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700899include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100900 $(Q)rm -f $@
901 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100902
903
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200905# or the modules are listed in "prepare".
906# A multi level approach is used. prepareN is processed before prepareN-1.
907# archprepare is used in arch Makefiles and when processed asm symlink,
908# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200910# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500911PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200912
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200913# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914# and if so do:
915# 1) Check that make has not been executed in the kernel src $(srctree)
916# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700917prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918ifneq ($(KBUILD_SRC),)
919 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700920 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 echo " $(srctree) is not clean, please run 'make mrproper'";\
922 echo " in the '$(srctree)' directory.";\
923 /bin/false; \
924 fi;
925 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
Thomas Gleixner96a388d2007-10-11 11:20:03 +0200926 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927endif
928
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200929# prepare2 creates a makefile if using a separate output directory
930prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
Roman Zippel3eb3c742007-01-10 14:45:28 +0100932prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
933 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200934 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200936archprepare: prepare1 scripts_basic
937
938prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200939 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200940 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800943prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200945# Leave this as default for preprocessing vmlinux.lds.S, which is now
946# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
948export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
949
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200950# The asm symlink changes when $(ARCH) changes.
951# Detect this and ask user to run make mrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200953include/asm: FORCE
954 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
955 if [ -L include/asm ]; then \
956 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
957 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
958 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
959 exit 1; \
960 fi; \
961 else \
962 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
963 if [ ! -d include ]; then \
964 mkdir -p include; \
965 fi; \
966 ln -fsn asm-$(SRCARCH) $@; \
967 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969# Generate some files
970# ---------------------------------------------------------------------------
971
972# KERNELRELEASE can change from a few different places, meaning version.h
973# needs to be updated, so this check is forced on all builds
974
975uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200976define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200978 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
979 exit 1; \
980 fi; \
981 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982endef
983
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200984define filechk_version.h
985 (echo \#define LINUX_VERSION_CODE $(shell \
986 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
987 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
988endef
989
990include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 $(call filechk,version.h)
992
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200993include/linux/utsrelease.h: include/config/kernel.release FORCE
994 $(call filechk,utsrelease.h)
995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996# ---------------------------------------------------------------------------
997
Paul Smith4f193362006-03-05 17:14:10 -0500998PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999depend dep:
1000 @echo '*** Warning: make $@ is unnecessary now.'
1001
1002# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001003# Firmware install
1004INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1005export INSTALL_FW_PATH
1006
1007PHONY += firmware_install
1008firmware_install: FORCE
1009 @mkdir -p $(objtree)/firmware
1010 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1011
1012# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001013# Kernel headers
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001014INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +01001015export INSTALL_HDR_PATH
1016
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001017HDRFILTER=generic i386 x86_64
1018HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
David Woodhouse6d716272006-09-24 22:16:03 +01001019
1020PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +01001021headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -07001022 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001023 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -07001024 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +01001025 done
1026
David Woodhouse8d730cf2006-06-18 11:58:39 +01001027PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +01001028headers_install: include/linux/version.h scripts_basic FORCE
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001029 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1030 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001031 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +02001032 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001033 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +01001034
Mike Frysinger1f857122007-02-14 00:33:02 -08001035PHONY += headers_check_all
1036headers_check_all: headers_install_all
1037 $(Q)for arch in $(HDRARCHES); do \
1038 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1039 done
1040
David Woodhouse68475352006-06-18 12:02:10 +01001041PHONY += headers_check
1042headers_check: headers_install
Thomas Gleixner96a388d2007-10-11 11:20:03 +02001043 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001044
David Woodhouse8d730cf2006-06-18 11:58:39 +01001045# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046# Modules
1047
1048ifdef CONFIG_MODULES
1049
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001050# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051
1052all: modules
1053
1054# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001055#
1056# A module can be listed more than once in obj-m resulting in
1057# duplicate lines in modules.order files. Those are removed
1058# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
Paul Smith4f193362006-03-05 17:14:10 -05001060PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001062 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001064 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
1066
1067# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001068PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001069modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001072PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073modules_install: _modinst_ _modinst_post
1074
Paul Smith4f193362006-03-05 17:14:10 -05001075PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001077 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 echo "Warning: you may need to install module-init-tools"; \
1079 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1080 sleep 1; \
1081 fi
1082 @rm -rf $(MODLIB)/kernel
1083 @rm -f $(MODLIB)/source
1084 @mkdir -p $(MODLIB)/kernel
1085 @ln -s $(srctree) $(MODLIB)/source
1086 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1087 rm -f $(MODLIB)/build ; \
1088 ln -s $(objtree) $(MODLIB)/build ; \
1089 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001090 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001091 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001093# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094# boot a modules.dep even before / is mounted read-write. However the
1095# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001096PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001098 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001099 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
1101else # CONFIG_MODULES
1102
1103# Modules not configured
1104# ---------------------------------------------------------------------------
1105
1106modules modules_install: FORCE
1107 @echo
1108 @echo "The present kernel configuration has modules disabled."
1109 @echo "Type 'make config' and enable loadable module support."
1110 @echo "Then build a kernel with module support enabled."
1111 @echo
1112 @exit 1
1113
1114endif # CONFIG_MODULES
1115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116###
1117# Cleaning is done on three levels.
1118# make clean Delete most generated files
1119# Leave enough to build external modules
1120# make mrproper Delete the current configuration, and all generated files
1121# make distclean Remove editor backup files, patch leftover files and the like
1122
1123# Directories & files removed with 'make clean'
1124CLEAN_DIRS += $(MODVERDIR)
1125CLEAN_FILES += vmlinux System.map \
1126 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1127
1128# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001129MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001130MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001131 include/linux/autoconf.h include/linux/version.h \
1132 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001133 include/linux/bounds.h include/asm*/asm-offsets.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001134 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136# clean - Delete most, but leave enough to build external modules
1137#
1138clean: rm-dirs := $(CLEAN_DIRS)
1139clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001140clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
Paul Smith4f193362006-03-05 17:14:10 -05001142PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143$(clean-dirs):
1144 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1145
1146clean: archclean $(clean-dirs)
1147 $(call cmd,rmdirs)
1148 $(call cmd,rmfiles)
1149 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001150 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001151 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Tejun Heo551559e2007-12-07 21:04:30 +09001152 -o -name '*.symtypes' -o -name 'modules.order' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 -type f -print | xargs rm -f
1154
1155# mrproper - Delete all generated files, including .config
1156#
1157mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1158mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1159mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1160
Paul Smith4f193362006-03-05 17:14:10 -05001161PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162$(mrproper-dirs):
1163 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1164
1165mrproper: clean archmrproper $(mrproper-dirs)
1166 $(call cmd,rmdirs)
1167 $(call cmd,rmfiles)
1168
1169# distclean
1170#
Paul Smith4f193362006-03-05 17:14:10 -05001171PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173distclean: mrproper
1174 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001175 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001177 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1179 -type f -print | xargs rm -f
1180
1181
1182# Packaging of the kernel to various formats
1183# ---------------------------------------------------------------------------
1184# rpm target kept for backward compatibility
1185package-dir := $(srctree)/scripts/package
1186
Zach Brown031ecc62006-06-08 22:12:37 -07001187%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001188 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001189rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001190 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191
1192
1193# Brief documentation of the typical targets used
1194# ---------------------------------------------------------------------------
1195
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001196boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001198board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1199board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201help:
1202 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001203 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001204 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001205 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001206 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 @echo ''
1208 @echo 'Configuration targets:'
1209 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1210 @echo ''
1211 @echo 'Other generic targets:'
1212 @echo ' all - Build all targets marked with [*]'
1213 @echo '* vmlinux - Build the bare kernel'
1214 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001215 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001216 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1217 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 @echo ' dir/ - Build all files in dir and below'
1219 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001220 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001221 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 @echo ' tags/TAGS - Generate tags file for editors'
1223 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001224 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001225 @echo ' kernelversion - Output the version stored in Makefile'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001226 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001227 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001228 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001229 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 @echo ''
1231 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 @echo ' checkstack - Generate a list of stack hogs'
1233 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001234 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001235 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001236 @echo ' export_report - List the usages of all exported symbols'
Thomas Gleixner91e034e2007-10-11 17:53:52 +02001237 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001238 echo ' headers_check - Sanity check on exported headers'; \
1239 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo ''
1241 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001242 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 @echo ''
1244 @echo 'Documentation targets:'
1245 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1246 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001247 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001249 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 @echo ''
1251 @$(if $(boards), \
1252 $(foreach b, $(boards), \
1253 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1254 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001255 @$(if $(board-dirs), \
1256 $(foreach b, $(board-dirs), \
1257 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1258 printf " %-16s - Show all of the above\\n" help-boards; \
1259 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001262 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001264 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1265 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 @echo ''
1267 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1268 @echo 'For further info see the ./README file'
1269
1270
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001271help-board-dirs := $(addprefix help-,$(board-dirs))
1272
1273help-boards: $(help-board-dirs)
1274
1275boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1276
1277$(help-board-dirs): help-%:
1278 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1279 @$(if $(boards-per-dir), \
1280 $(foreach b, $(boards-per-dir), \
1281 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1282 echo '')
1283
1284
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285# Documentation targets
1286# ---------------------------------------------------------------------------
1287%docs: scripts_basic FORCE
1288 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1289
1290else # KBUILD_EXTMOD
1291
1292###
1293# External module support.
1294# When building external modules the kernel used as basis is considered
1295# read-only, and no consistency checks are made and the make
1296# system is not used on the basis kernel. If updates are required
1297# in the basis kernel ordinary make commands (without M=...) must
1298# be used.
1299#
1300# The following are the only valid targets when building external
1301# modules.
1302# make M=dir clean Delete all automatically generated files
1303# make M=dir modules Make all modules in specified dir
1304# make M=dir Same as 'make M=dir modules'
1305# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001306# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307# Assumes install directory is already created
1308
1309# We are always building modules
1310KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001311PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001313 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
Paul Smith4f193362006-03-05 17:14:10 -05001315PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316$(objtree)/Module.symvers:
1317 @test -e $(objtree)/Module.symvers || ( \
1318 echo; \
1319 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1320 echo " is missing; modules will have no dependencies and modversions."; \
1321 echo )
1322
1323module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001324PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325$(module-dirs): crmodverdir $(objtree)/Module.symvers
1326 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1327
1328modules: $(module-dirs)
1329 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001330 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331
Paul Smith4f193362006-03-05 17:14:10 -05001332PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001333modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001334
Paul Smith4f193362006-03-05 17:14:10 -05001335install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1336PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001337_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001338 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001339 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340
Paul Smith4f193362006-03-05 17:14:10 -05001341PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001342_emodinst_post: _emodinst_
1343 $(call cmd,depmod)
1344
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1346
Paul Smith4f193362006-03-05 17:14:10 -05001347PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348$(clean-dirs):
1349 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1350
1351clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001352clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353clean: $(clean-dirs)
1354 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001355 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001357 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1359 -type f -print | xargs rm -f
1360
1361help:
1362 @echo ' Building external modules.'
1363 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1364 @echo ''
1365 @echo ' modules - default target, build the module(s)'
1366 @echo ' modules_install - install the module'
1367 @echo ' clean - remove generated files in module directory only'
1368 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001369
1370# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001371PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001372prepare: ;
1373scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374endif # KBUILD_EXTMOD
1375
1376# Generate tags for editors
1377# ---------------------------------------------------------------------------
1378
1379#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1380#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1381#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1382
George Anzingerf182ae62005-07-07 17:56:06 -07001383ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384__srctree =
1385else
1386__srctree = $(srctree)/
1387endif
1388
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001389ifeq ($(ALLSOURCE_ARCHS),)
1390ifeq ($(ARCH),um)
1391ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1392else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001393ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001394endif
1395else
Linus Nilssond384e352008-01-20 17:10:01 +01001396#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001397ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1398endif
1399
Thomas Gleixnerd0974b12007-11-15 07:11:12 +01001400ALLSOURCE_ARCHS := $(SRCARCH)
Ian Campbella0674e82005-06-23 11:25:54 +01001401
Masatake YAMATOe838db62006-06-22 12:21:20 +09001402define find-sources
Yinghai Luf8bea582007-10-16 00:28:06 -07001403 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1404 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001405 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001406 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001408 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 find $(__srctree)include $(RCS_FIND_IGNORE) \
1410 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001411 -o -name $1 -print; \
Yinghai Luf8bea582007-10-16 00:28:06 -07001412 for arch in $(ALLINCLUDE_ARCHS) ; do \
1413 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001414 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001415 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001417 -name $1 -print; \
1418 find $(__srctree) $(RCS_FIND_IGNORE) \
Yinghai Lu37ab7a22007-10-17 16:43:39 -07001419 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001420 -name $1 -print; \
1421 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001422endef
1423
1424define all-sources
1425 $(call find-sources,'*.[chS]')
1426endef
1427define all-kconfigs
1428 $(call find-sources,'Kconfig*')
1429endef
1430define all-defconfigs
1431 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432endef
1433
Aron Griffisda7c0402006-09-21 00:27:02 -04001434define xtags
1435 if $1 --version 2>&1 | grep -iq exuberant; then \
1436 $(all-sources) | xargs $1 -a \
1437 -I __initdata,__exitdata,__acquires,__releases \
Uwe Kleine-König2c812102008-01-08 15:16:24 +01001438 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
Aron Griffisda7c0402006-09-21 00:27:02 -04001439 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001440 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001441 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001442 $(all-kconfigs) | xargs $1 -a \
1443 --langdef=kconfig \
1444 --language-force=kconfig \
Alexey Dobriyan80ff2622008-02-22 15:02:33 +03001445 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
David Gibson18e39912006-10-04 02:15:32 -07001446 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001447 --langdef=dotconfig \
1448 --language-force=dotconfig \
1449 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1450 elif $1 --version 2>&1 | grep -iq emacs; then \
1451 $(all-sources) | xargs $1 -a; \
1452 $(all-kconfigs) | xargs $1 -a \
Masatake YAMATOa95bcfa2008-05-07 16:04:31 +09001453 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
David Gibson18e39912006-10-04 02:15:32 -07001454 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001455 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1456 else \
1457 $(all-sources) | xargs $1 -a; \
1458 fi
1459endef
1460
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001462 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
1464quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001465 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466
1467cscope: FORCE
1468 $(call cmd,cscope-file)
1469 $(call cmd,cscope)
1470
1471quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001472define cmd_TAGS
1473 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001474 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001475endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001477TAGS: FORCE
1478 $(call cmd,TAGS)
1479
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480quiet_cmd_tags = MAKE $@
1481define cmd_tags
1482 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001483 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484endef
1485
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486tags: FORCE
1487 $(call cmd,tags)
1488
1489
1490# Scripts to check various things for consistency
1491# ---------------------------------------------------------------------------
1492
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493includecheck:
1494 find * $(RCS_FIND_IGNORE) \
1495 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001496 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
1498versioncheck:
1499 find * $(RCS_FIND_IGNORE) \
1500 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001501 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503namespacecheck:
1504 $(PERL) $(srctree)/scripts/namespace.pl
1505
Adrian Bunk295ac052007-08-24 23:04:56 +02001506export_report:
1507 $(PERL) $(srctree)/scripts/export_report.pl
1508
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509endif #ifeq ($(config-targets),1)
1510endif #ifeq ($(mixed-targets),1)
1511
Roman Zippelc30a02e2006-06-08 22:12:50 -07001512PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001513
Jeff Dike011e3a92006-12-13 00:34:12 -08001514# UML needs a little special treatment here. It wants to use the host
1515# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1516# else wants $(ARCH), including people doing cross-builds, which means
1517# that $(SUBARCH) doesn't work here.
1518ifeq ($(ARCH), um)
1519CHECKSTACK_ARCH := $(SUBARCH)
1520else
1521CHECKSTACK_ARCH := $(ARCH)
1522endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523checkstack:
1524 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001525 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
1527kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001528 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1529 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001530kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001531 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
Sam Ravnborg06300b22006-01-25 07:13:18 +01001533# Single targets
1534# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001535# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001536# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001537# - build with separate output dir 'make O=...'
1538# - external modules
1539#
1540# target-dir => where to store outputfile
1541# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001542
Sam Ravnborg06300b22006-01-25 07:13:18 +01001543ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001544 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001545 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001546else
1547 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001548 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1549 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001550endif
1551
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001552%.s: %.c prepare scripts FORCE
1553 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1554%.i: %.c prepare scripts FORCE
1555 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1556%.o: %.c prepare scripts FORCE
1557 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1558%.lst: %.c prepare scripts FORCE
1559 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1560%.s: %.S prepare scripts FORCE
1561 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1562%.o: %.S prepare scripts FORCE
1563 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001564%.symtypes: %.c prepare scripts FORCE
1565 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001566
1567# Modules
1568/ %/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001569 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001570 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001571 $(build)=$(build-dir)
1572%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001573 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001574 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001575 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001576 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001577
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578# FIXME Should go into a make.lib or something
1579# ===========================================================================
1580
1581quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1582 cmd_rmdirs = rm -rf $(rm-dirs)
1583
1584quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1585 cmd_rmfiles = rm -f $(rm-files)
1586
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001587# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001588quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1589 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001590 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001591 $(DEPMOD) -ae -F System.map \
1592 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1593 $(KERNELRELEASE); \
1594 fi
1595
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001596# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001597# clean it up only when building all modules
1598cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1599 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600
Sam Ravnborg222d3942007-10-15 21:59:31 +02001601a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg06c50402007-10-15 22:17:25 +02001602 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001603 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
1605quiet_cmd_as_o_S = AS $@
1606cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1607
1608# read all saved command lines
1609
1610targets := $(wildcard $(sort $(targets)))
1611cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1612
1613ifneq ($(cmd_files),)
1614 $(cmd_files): ; # Do not try to update included dependency files
1615 include $(cmd_files)
1616endif
1617
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1619# Usage:
1620# $(Q)$(MAKE) $(clean)=dir
1621clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1622
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623endif # skip-makefile
1624
Paul Smith4f193362006-03-05 17:14:10 -05001625PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001627
Paul Smith4f193362006-03-05 17:14:10 -05001628# Declare the contents of the .PHONY variable as phony. We keep that
1629# information in a variable se we can use it in if_changed and friends.
1630.PHONY: $(PHONY)