blob: adb2c748e105609e2f37b91318e87c90bb189961 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds120bda22006-07-05 21:09:49 -07003SUBLEVEL = 18
Linus Torvaldse478bec2006-09-19 20:42:06 -07004EXTRAVERSION =
5NAME=Avast! A 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
13# Do not print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040044# Call a source code checker (by default, "sparse") as part of the
45# C compilation.
46#
47# Use 'make C=1' to enable checking of only re-compiled files.
48# Use 'make C=2' to enable checking of *all* source files, regardless
49# of whether they are re-compiled or not.
50#
51# See the file "Documentation/sparse.txt" for more details, including
52# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54ifdef C
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
57 endif
58endif
59ifndef KBUILD_CHECKSRC
60 KBUILD_CHECKSRC = 0
61endif
62
63# Use make M=dir to specify directory of external module to build
64# Old syntax make ... SUBDIRS=$PWD is still supported
65# Setting the environment variable KBUILD_EXTMOD take precedence
66ifdef SUBDIRS
67 KBUILD_EXTMOD ?= $(SUBDIRS)
68endif
69ifdef M
70 ifeq ("$(origin M)", "command line")
71 KBUILD_EXTMOD := $(M)
72 endif
73endif
74
75
76# kbuild supports saving output files in a separate directory.
77# To locate output files in a separate directory two syntaxes are supported.
78# In both cases the working directory must be the root of the kernel src.
79# 1) O=
80# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020081#
Linus Torvalds1da177e2005-04-16 15:20:36 -070082# 2) Set KBUILD_OUTPUT
83# Set the environment variable KBUILD_OUTPUT to point to the directory
84# where the output files shall be placed.
85# export KBUILD_OUTPUT=dir/to/store/output/files/
86# make
87#
88# The O= assignment takes precedence over the KBUILD_OUTPUT environment
89# variable.
90
91
92# KBUILD_SRC is set on invocation of make in OBJ directory
93# KBUILD_SRC is not intended to be used by the regular user (for now)
94ifeq ($(KBUILD_SRC),)
95
96# OK, Make called in directory where kernel src resides
97# Do we want to locate output files in a separate directory?
98ifdef O
99 ifeq ("$(origin O)", "command line")
100 KBUILD_OUTPUT := $(O)
101 endif
102endif
103
104# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500105PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106_all:
107
108ifneq ($(KBUILD_OUTPUT),)
109# Invoke a second make in the output directory, passing relevant variables
110# check that the output directory actually exists
111saved-output := $(KBUILD_OUTPUT)
112KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
113$(if $(KBUILD_OUTPUT),, \
114 $(error output directory "$(saved-output)" does not exist))
115
Paul Smith4f193362006-03-05 17:14:10 -0500116PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800118$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200119 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
120 KBUILD_SRC=$(CURDIR) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800121 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123# Leave processing to above invocation of make
124skip-makefile := 1
125endif # ifneq ($(KBUILD_OUTPUT),)
126endif # ifeq ($(KBUILD_SRC),)
127
128# We process the rest of the Makefile if this is the final invocation of make
129ifeq ($(skip-makefile),)
130
131# If building an external module we do not care about the all: rule
132# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500133PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134ifeq ($(KBUILD_EXTMOD),)
135_all: all
136else
137_all: modules
138endif
139
140srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
141TOPDIR := $(srctree)
142# FIXME - TOPDIR is obsolete, use srctree/objtree
143objtree := $(CURDIR)
144src := $(srctree)
145obj := $(objtree)
146
Mattia Dongili0f558c32006-02-19 13:50:37 +0100147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149export srctree objtree VPATH TOPDIR
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152# SUBARCH tells the usermode build what the underlying arch is. That is set
153# first, and if a usermode build is happening, the "ARCH=um" on the command
154# line overrides the setting of ARCH below. If a native build is happening,
155# then ARCH is assigned, getting whatever value it gets normally, and
156# SUBARCH is subsequently ignored.
157
158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
159 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800160 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163# Cross compiling and selecting different set of gcc/bin-utils
164# ---------------------------------------------------------------------------
165#
166# When performing cross compilation for other architectures ARCH shall be set
167# to the target architecture. (See arch/* for the possibilities).
168# ARCH can be set during invocation of make:
169# make ARCH=ia64
170# Another way is to have ARCH set in the environment.
171# The default ARCH is the host where make is executed.
172
173# CROSS_COMPILE specify the prefix used for all executables used
174# during compilation. Only gcc and related bin-utils executables
175# are prefixed with $(CROSS_COMPILE).
176# CROSS_COMPILE can be set on the command line
177# make CROSS_COMPILE=ia64-linux-
178# Alternatively CROSS_COMPILE can be set in the environment.
179# Default value for CROSS_COMPILE is not to prefix executables
180# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
181
182ARCH ?= $(SUBARCH)
183CROSS_COMPILE ?=
184
185# Architecture as present in compile.h
186UTS_MACHINE := $(ARCH)
187
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700188KCONFIG_CONFIG ?= .config
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190# SHELL used by kbuild
191CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
192 else if [ -x /bin/bash ]; then echo /bin/bash; \
193 else echo sh; fi ; fi)
194
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200195HOSTCC = gcc
196HOSTCXX = g++
197HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
198HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200200# Decide whether to build built-in, modular, or both.
201# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203KBUILD_MODULES :=
204KBUILD_BUILTIN := 1
205
206# If we have only "make modules", don't compile built-in objects.
207# When we're building modules with modversions, we need to consider
208# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200209# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211ifeq ($(MAKECMDGOALS),modules)
212 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
213endif
214
215# If we have "make <whatever> modules", compile modules
216# in addition to whatever we do anyway.
217# Just "make" or "make all" shall build modules as well
218
219ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
220 KBUILD_MODULES := 1
221endif
222
223ifeq ($(MAKECMDGOALS),)
224 KBUILD_MODULES := 1
225endif
226
Sam Ravnborge579d352005-07-27 08:10:10 +0200227export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
229
230# Beautify output
231# ---------------------------------------------------------------------------
232#
233# Normally, we echo the whole command before executing it. By making
234# that echo $($(quiet)$(cmd)), we now have the possibility to set
235# $(quiet) to choose other forms of output instead, e.g.
236#
237# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
238# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
239#
240# If $(quiet) is empty, the whole command will be printed.
241# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200242# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243# the variable $(silent_cmd_cc_o_c) doesn't exist.
244#
Adrian Bunka58a4142006-01-10 00:08:17 +0100245# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246# for commands that shall be hidden in non-verbose mode.
247#
248# $(Q)ln $@ :<
249#
250# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
251# If KBUILD_VERBOSE equals 1 then the above command is displayed.
252
253ifeq ($(KBUILD_VERBOSE),1)
254 quiet =
255 Q =
256else
257 quiet=quiet_
258 Q = @
259endif
260
261# If the user is running make -s (silent mode), suppress echoing of
262# commands
263
264ifneq ($(findstring s,$(MAKEFLAGS)),)
265 quiet=silent_
266endif
267
268export quiet Q KBUILD_VERBOSE
269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271# Look for make include files relative to root of kernel src
272MAKEFLAGS += --include-dir=$(srctree)
273
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000274# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000275include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000276
Sam Ravnborg566f81c2006-06-10 09:15:27 +0200277# Do not use make's built-in rules and variables
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200278# This increases performance and avoid hard-to-debug behavour
Sam Ravnborg566f81c2006-06-10 09:15:27 +0200279MAKEFLAGS += -rR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281# Make variables (CC, etc...)
282
283AS = $(CROSS_COMPILE)as
284LD = $(CROSS_COMPILE)ld
285CC = $(CROSS_COMPILE)gcc
286CPP = $(CC) -E
287AR = $(CROSS_COMPILE)ar
288NM = $(CROSS_COMPILE)nm
289STRIP = $(CROSS_COMPILE)strip
290OBJCOPY = $(CROSS_COMPILE)objcopy
291OBJDUMP = $(CROSS_COMPILE)objdump
292AWK = awk
293GENKSYMS = scripts/genksyms/genksyms
294DEPMOD = /sbin/depmod
295KALLSYMS = scripts/kallsyms
296PERL = perl
297CHECK = sparse
298
Al Viroaf4ca452005-10-21 02:55:38 -0400299CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300MODFLAGS = -DMODULE
301CFLAGS_MODULE = $(MODFLAGS)
302AFLAGS_MODULE = $(MODFLAGS)
303LDFLAGS_MODULE = -r
304CFLAGS_KERNEL =
305AFLAGS_KERNEL =
306
307
308# Use LINUXINCLUDE when you must reference the include/ directory.
309# Needed to be compatible with the O= option
310LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100311 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800312 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
315
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200316CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
317 -fno-strict-aliasing -fno-common
318AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700320# Read KERNELRELEASE from include/config/kernel.release (if it exists)
321KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100322KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100323
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200324export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
325export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
326export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
327export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200330export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
332
333# When compiling out-of-tree modules, put MODVERDIR in the module
334# tree rather than in the kernel tree. The kernel tree might
335# even be read-only.
336export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338# Files to ignore in find ... statements
339
Trond Myklebust406119f2005-10-27 14:46:53 -0400340RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
341export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343# ===========================================================================
344# Rules shared between *config targets and build targets
345
346# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500347PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348scripts_basic:
349 $(Q)$(MAKE) $(build)=scripts/basic
350
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200351# To avoid any implicit rule to kick in, define an empty command.
352scripts/basic/%: scripts_basic ;
353
Paul Smith4f193362006-03-05 17:14:10 -0500354PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200355# outputmakefile generates a Makefile in the output directory, if using a
356# separate output directory. This allows convenient use of make in the
357# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200359ifneq ($(KBUILD_SRC),)
360 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
361 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
362endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364# To make sure we do not include .config for any of the *config targets
365# catch them early, and hand them over to scripts/kconfig/Makefile
366# It is allowed to specify more targets when calling make, including
367# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200368# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369# Detect when mixed targets is specified, and make a second invocation
370# of make so .config is not included in this case either (for *config).
371
372no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700373 cscope TAGS tags help %docs check% \
Sam Ravnborg667918a2006-07-08 00:46:25 +0200374 include/linux/version.h headers_% \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700375 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377config-targets := 0
378mixed-targets := 0
379dot-config := 1
380
381ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
383 dot-config := 0
384 endif
385endif
386
387ifeq ($(KBUILD_EXTMOD),)
388 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
389 config-targets := 1
390 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
391 mixed-targets := 1
392 endif
393 endif
394endif
395
396ifeq ($(mixed-targets),1)
397# ===========================================================================
398# We're called with mixed targets (*config and build targets).
399# Handle them one by one.
400
401%:: FORCE
402 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
403
404else
405ifeq ($(config-targets),1)
406# ===========================================================================
407# *config targets only - make sure prerequisites are updated, and descend
408# in scripts/kconfig to make the *config target
409
410# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
411# KBUILD_DEFCONFIG may point out an alternative default configuration
412# used for 'make defconfig'
413include $(srctree)/arch/$(ARCH)/Makefile
414export KBUILD_DEFCONFIG
415
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200416config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700417 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 $(Q)$(MAKE) $(build)=scripts/kconfig $@
419
420else
421# ===========================================================================
422# Build targets only - this includes vmlinux, arch specific targets, clean
423# targets and others. In general all targets except *config targets.
424
425ifeq ($(KBUILD_EXTMOD),)
426# Additional helpers built in scripts/
427# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200428# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500429PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700430scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 $(Q)$(MAKE) $(build)=$(@)
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433# Objects we will link into vmlinux / subdirs we need to visit
434init-y := init/
435drivers-y := drivers/ sound/
436net-y := net/
437libs-y := lib/
438core-y := usr/
439endif # KBUILD_EXTMOD
440
441ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200442# Read in config
443-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200445ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446# Read in dependencies to all Kconfig* files, make sure to run
447# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700448-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700451$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Roman Zippelc955cca2006-06-08 22:12:39 -0700453# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100454# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200455# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100456# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700457include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
459else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200460# external modules needs include/linux/autoconf.h and include/config/auto.conf
461# but do not care if they are up-to-date. Use auto.conf to trigger the test
462PHONY += include/config/auto.conf
463
464include/config/auto.conf:
465 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
466 echo; \
467 echo " ERROR: Kernel configuration is invalid."; \
468 echo " include/linux/autoconf.h or $@ are missing."; \
469 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
470 echo; \
471 /bin/false)
472
473endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475else
476# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700477include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200478endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480# The all: target is the default when no target is given on the
481# command line.
482# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200483# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484all: vmlinux
485
486ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
487CFLAGS += -Os
488else
489CFLAGS += -O2
490endif
491
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200492include $(srctree)/arch/$(ARCH)/Makefile
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700495CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496else
497CFLAGS += -fomit-frame-pointer
498endif
499
Jan Beulich604bf5a2006-03-24 03:16:19 -0800500ifdef CONFIG_UNWIND_INFO
501CFLAGS += -fasynchronous-unwind-tables
502endif
503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504ifdef CONFIG_DEBUG_INFO
505CFLAGS += -g
506endif
507
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200508# Force gcc to behave correct even for buggy distributions
509CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Sam Ravnborge8e69932005-04-30 16:51:42 -0700511# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700512NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700513CHECKFLAGS += $(NOSTDINC_FLAGS)
514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515# warn about C99 declaration after statement
516CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
517
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200518# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519CFLAGS += $(call cc-option,-Wno-pointer-sign,)
520
521# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200522# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523# set in the environment
524# Also any assignments in arch/$(ARCH)/Makefile take precedence over
525# this default value
526export KBUILD_IMAGE ?= vmlinux
527
528#
529# INSTALL_PATH specifies where to place the updated kernel and system map
530# images. Default is /boot, but you can set it to other values
531export INSTALL_PATH ?= /boot
532
533#
534# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
535# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200536# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537#
538
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100539MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540export MODLIB
541
Theodore Ts'oac031f22006-06-21 20:53:09 -0400542#
543# INSTALL_MOD_STRIP, if defined, will cause modules to be
544# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
545# the default option --strip-debug will be used. Otherwise,
546# INSTALL_MOD_STRIP will used as the options to the strip command.
547
548ifdef INSTALL_MOD_STRIP
549ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200550mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400551else
552mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
553endif # INSTALL_MOD_STRIP=1
554else
555mod_strip_cmd = true
556endif # INSTALL_MOD_STRIP
557export mod_strip_cmd
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100561core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
563vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
564 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
565 $(net-y) $(net-m) $(libs-y) $(libs-m)))
566
567vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
568 $(init-n) $(init-) \
569 $(core-n) $(core-) $(drivers-n) $(drivers-) \
570 $(net-n) $(net-) $(libs-n) $(libs-))))
571
572init-y := $(patsubst %/, %/built-in.o, $(init-y))
573core-y := $(patsubst %/, %/built-in.o, $(core-y))
574drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
575net-y := $(patsubst %/, %/built-in.o, $(net-y))
576libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
577libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
578libs-y := $(libs-y1) $(libs-y2)
579
580# Build vmlinux
581# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200582# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583# $(vmlinux-main). Most are built-in.o files from top-level directories
584# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
585# Ordering when linking is important, and $(vmlinux-init) must be first.
586#
587# vmlinux
588# ^
589# |
590# +-< $(vmlinux-init)
591# | +--< init/version.o + more
592# |
593# +--< $(vmlinux-main)
594# | +--< driver/built-in.o mm/built-in.o + more
595# |
596# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
597#
598# vmlinux version (uname -v) cannot be updated during normal
599# descending-into-subdirs phase since we do not yet know if we need to
600# update vmlinux.
601# Therefore this step is delayed until just before final link of vmlinux -
602# except in the kallsyms case where it is done just before adding the
603# symbols to the kernel.
604#
605# System.map is generated to document addresses of all kernel symbols
606
607vmlinux-init := $(head-y) $(init-y)
608vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
609vmlinux-all := $(vmlinux-init) $(vmlinux-main)
610vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
611
612# Rule to link vmlinux - also used during CONFIG_KALLSYMS
613# May be overridden by arch/$(ARCH)/Makefile
614quiet_cmd_vmlinux__ ?= LD $@
615 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
616 -T $(vmlinux-lds) $(vmlinux-init) \
617 --start-group $(vmlinux-main) --end-group \
618 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
619
620# Generate new vmlinux version
621quiet_cmd_vmlinux_version = GEN .version
622 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200623 if [ ! -r .version ]; then \
624 rm -f .version; \
625 echo 1 >.version; \
626 else \
627 mv .version .old_version; \
628 expr 0$$(cat .old_version) + 1 >.version; \
629 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 $(MAKE) $(build)=init
631
632# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200633quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
635
636# Link of vmlinux
637# If CONFIG_KALLSYMS is set .version is already updated
638# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700639# Use + in front of the vmlinux_version rule to silent warning with make -j2
640# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700642 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
644
645 $(call cmd,vmlinux__)
646 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
647
Sam Ravnborg46352812006-08-08 21:41:18 +0200648 $(Q)$(if $($(quiet)cmd_sysmap), \
649 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
650 $(cmd_sysmap) $@ System.map; \
651 if [ $$? -ne 0 ]; then \
652 rm -f $@; \
653 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 fi;
655 $(verify_kallsyms)
656endef
657
658
659ifdef CONFIG_KALLSYMS
660# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
661# It's a three stage process:
662# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
663# empty
664# Running kallsyms on that gives us .tmp_kallsyms1.o with
665# the right size - vmlinux version (uname -v) is updated during this step
666# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
667# but due to the added section, some addresses have shifted.
668# From here, we generate a correct .tmp_kallsyms2.o
669# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
670# o Verify that the System.map from vmlinux matches the map from
671# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
672# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
673# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
674# temporary bypass to allow the kernel to be built while the
675# maintainers work out what went wrong with kallsyms.
676
677ifdef CONFIG_KALLSYMS_EXTRA_PASS
678last_kallsyms := 3
679else
680last_kallsyms := 2
681endif
682
683kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
684
685define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200686 $(Q)$(if $($(quiet)cmd_sysmap), \
687 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200689 $(Q)cmp -s System.map .tmp_System.map || \
690 (echo Inconsistent kallsyms data; \
691 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 rm .tmp_kallsyms* ; /bin/false )
693endef
694
695# Update vmlinux version before link
696# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200697# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698cmd_ksym_ld = $(cmd_vmlinux__)
699define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200700 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 +$(call cmd,vmlinux_version)
702 $(call cmd,vmlinux__)
703 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
704endef
705
706# Generate .S file with all kernel symbols
707quiet_cmd_kallsyms = KSYM $@
708 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
709 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
710
711.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
712 $(call if_changed_dep,as_o_S)
713
714.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
715 $(call cmd,kallsyms)
716
717# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
718.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
719 $(call if_changed_rule,ksym_ld)
720
721.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
722 $(call if_changed,vmlinux__)
723
724.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
725 $(call if_changed,vmlinux__)
726
727# Needs to visit scripts/ before $(KALLSYMS) can be used.
728$(KALLSYMS): scripts ;
729
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000730# Generate some data for debugging strange kallsyms problems
731debug_kallsyms: .tmp_map$(last_kallsyms)
732
733.tmp_map%: .tmp_vmlinux% FORCE
734 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
735
736.tmp_map3: .tmp_map2
737
738.tmp_map2: .tmp_map1
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740endif # ifdef CONFIG_KALLSYMS
741
742# vmlinux image - including updated kernel symbols
743vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
744 $(call if_changed_rule,vmlinux__)
Sam Ravnborg12715d22006-08-08 20:43:39 +0200745 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200746 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
748# The actual objects are generated when descending,
749# make sure no implicit rule kicks in
750$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
751
752# Handle descending into subdirectories listed in $(vmlinux-dirs)
753# Preset locale variables to speed up the build process. Limit locale
754# tweaks to this spot to avoid wrong language settings when running
755# make menuconfig etc.
756# Error messages still appears in the original language
757
Paul Smith4f193362006-03-05 17:14:10 -0500758PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200759$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 $(Q)$(MAKE) $(build)=$@
761
Sam Ravnborgcb584552006-01-09 21:20:34 +0100762# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100763#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400764# The KERNELRELEASE value built here is stored in the file
765# include/config/kernel.release, and is used when executing several
766# make targets, such as "make install" or "make modules_install."
767#
768# The eventual kernel release string consists of the following fields,
769# shown in a hierarchical format to show how smaller parts are concatenated
770# to form the larger and final value, with values coming from places like
771# the Makefile, kernel config options, make command line options and/or
772# SCM tag information.
773#
774# $(KERNELVERSION)
775# $(VERSION) eg, 2
776# $(PATCHLEVEL) eg, 6
777# $(SUBLEVEL) eg, 18
778# $(EXTRAVERSION) eg, -rc6
779# $(localver-full)
780# $(localver)
781# localversion* (all localversion* files)
782# $(CONFIG_LOCALVERSION) (from kernel config setting)
783# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
784# ./scripts/setlocalversion (SCM tag, if one exists)
785# $(LOCALVERSION) (from make command line if provided)
786#
787# Note how the final $(localver-auto) string is included *only* if the
788# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
789# moment, only git is supported but other SCMs can edit the script
790# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100791
792nullstring :=
793space := $(nullstring) # end of line
794
795___localver = $(objtree)/localversion* $(srctree)/localversion*
796__localver = $(sort $(wildcard $(___localver)))
797# skip backup files (containing '~')
798_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
799
800localver = $(subst $(space),, \
801 $(shell cat /dev/null $(_localver)) \
802 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200803
Sam Ravnborgcb584552006-01-09 21:20:34 +0100804# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
805# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200806# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100807#
808# Currently, only git is supported.
809# Other SCMs can edit scripts/setlocalversion and add the appropriate
810# checks as needed.
811ifdef CONFIG_LOCALVERSION_AUTO
812 _localver-auto = $(shell $(CONFIG_SHELL) \
813 $(srctree)/scripts/setlocalversion $(srctree))
814 localver-auto = $(LOCALVERSION)$(_localver-auto)
815endif
816
817localver-full = $(localver)$(localver-auto)
818
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700819# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100820kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700821include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100822 $(Q)rm -f $@
823 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100824
825
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200827# or the modules are listed in "prepare".
828# A multi level approach is used. prepareN is processed before prepareN-1.
829# archprepare is used in arch Makefiles and when processed asm symlink,
830# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200832# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500833PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200834
835# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500836PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200838# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839# and if so do:
840# 1) Check that make has not been executed in the kernel src $(srctree)
841# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700842prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843ifneq ($(KBUILD_SRC),)
844 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700845 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 echo " $(srctree) is not clean, please run 'make mrproper'";\
847 echo " in the '$(srctree)' directory.";\
848 /bin/false; \
849 fi;
850 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
851 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
852endif
853
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200854# prepare2 creates a makefile if using a separate output directory
855prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200857prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
858 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400861 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862endif
863
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200864archprepare: prepare1 scripts_basic
865
866prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200867 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200870prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200872# Leave this as default for preprocessing vmlinux.lds.S, which is now
873# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
875export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
876
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200877# FIXME: The asm symlink changes when $(ARCH) changes. That's
878# hard to detect, but I suppose "make mrproper" is a good idea
879# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881include/asm:
882 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
883 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
884 @ln -fsn asm-$(ARCH) $@
885
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886# Generate some files
887# ---------------------------------------------------------------------------
888
889# KERNELRELEASE can change from a few different places, meaning version.h
890# needs to be updated, so this check is forced on all builds
891
892uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200893define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200895 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
896 exit 1; \
897 fi; \
898 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899endef
900
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200901define filechk_version.h
902 (echo \#define LINUX_VERSION_CODE $(shell \
903 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
904 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
905endef
906
907include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 $(call filechk,version.h)
909
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200910include/linux/utsrelease.h: include/config/kernel.release FORCE
911 $(call filechk,utsrelease.h)
912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913# ---------------------------------------------------------------------------
914
Paul Smith4f193362006-03-05 17:14:10 -0500915PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916depend dep:
917 @echo '*** Warning: make $@ is unnecessary now.'
918
919# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100920# Kernel headers
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700921INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100922export INSTALL_HDR_PATH
923
David Woodhouse6d716272006-09-24 22:16:03 +0100924HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
925
926PHONY += headers_install_all
Linus Torvalds398477d2006-09-24 14:55:52 -0700927headers_install_all: include/linux/version.h scripts_basic FORCE
928 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100929 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700930 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100931 done
932
David Woodhouse8d730cf2006-06-18 11:58:39 +0100933PHONY += headers_install
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200934headers_install: include/linux/version.h scripts_basic FORCE
David Woodhousef17b7ba2006-09-21 09:01:45 +0100935 @if [ ! -r include/asm-$(ARCH)/Kbuild ]; then \
936 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
937 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200938 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200939 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100940
David Woodhouse68475352006-06-18 12:02:10 +0100941PHONY += headers_check
942headers_check: headers_install
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200943 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100944
David Woodhouse8d730cf2006-06-18 11:58:39 +0100945# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946# Modules
947
948ifdef CONFIG_MODULES
949
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200950# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
952all: modules
953
954# Build modules
955
Paul Smith4f193362006-03-05 17:14:10 -0500956PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
958 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200959 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
961
962# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500963PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200964modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
966# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500967PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968modules_install: _modinst_ _modinst_post
969
Paul Smith4f193362006-03-05 17:14:10 -0500970PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700972 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 echo "Warning: you may need to install module-init-tools"; \
974 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
975 sleep 1; \
976 fi
977 @rm -rf $(MODLIB)/kernel
978 @rm -f $(MODLIB)/source
979 @mkdir -p $(MODLIB)/kernel
980 @ln -s $(srctree) $(MODLIB)/source
981 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
982 rm -f $(MODLIB)/build ; \
983 ln -s $(objtree) $(MODLIB)/build ; \
984 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200985 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987# If System.map exists, run depmod. This deliberately does not have a
988# dependency on System.map since that would run the dependency tree on
989# vmlinux. This depmod is only for convenience to give the initial
990# boot a modules.dep even before / is mounted read-write. However the
991# boot script depmod is the master version.
992ifeq "$(strip $(INSTALL_MOD_PATH))" ""
993depmod_opts :=
994else
995depmod_opts := -b $(INSTALL_MOD_PATH) -r
996endif
Paul Smith4f193362006-03-05 17:14:10 -0500997PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998_modinst_post: _modinst_
999 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1000
1001else # CONFIG_MODULES
1002
1003# Modules not configured
1004# ---------------------------------------------------------------------------
1005
1006modules modules_install: FORCE
1007 @echo
1008 @echo "The present kernel configuration has modules disabled."
1009 @echo "Type 'make config' and enable loadable module support."
1010 @echo "Then build a kernel with module support enabled."
1011 @echo
1012 @exit 1
1013
1014endif # CONFIG_MODULES
1015
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016###
1017# Cleaning is done on three levels.
1018# make clean Delete most generated files
1019# Leave enough to build external modules
1020# make mrproper Delete the current configuration, and all generated files
1021# make distclean Remove editor backup files, patch leftover files and the like
1022
1023# Directories & files removed with 'make clean'
1024CLEAN_DIRS += $(MODVERDIR)
1025CLEAN_FILES += vmlinux System.map \
1026 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1027
1028# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001029MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001030MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001031 include/linux/autoconf.h include/linux/version.h \
1032 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001033 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
1035# clean - Delete most, but leave enough to build external modules
1036#
1037clean: rm-dirs := $(CLEAN_DIRS)
1038clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001039clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040
Paul Smith4f193362006-03-05 17:14:10 -05001041PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042$(clean-dirs):
1043 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1044
1045clean: archclean $(clean-dirs)
1046 $(call cmd,rmdirs)
1047 $(call cmd,rmfiles)
1048 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001049 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001050 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1051 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 -type f -print | xargs rm -f
1053
1054# mrproper - Delete all generated files, including .config
1055#
1056mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1057mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1058mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1059
Paul Smith4f193362006-03-05 17:14:10 -05001060PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061$(mrproper-dirs):
1062 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1063
1064mrproper: clean archmrproper $(mrproper-dirs)
1065 $(call cmd,rmdirs)
1066 $(call cmd,rmfiles)
1067
1068# distclean
1069#
Paul Smith4f193362006-03-05 17:14:10 -05001070PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072distclean: mrproper
1073 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001074 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001076 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1078 -type f -print | xargs rm -f
1079
1080
1081# Packaging of the kernel to various formats
1082# ---------------------------------------------------------------------------
1083# rpm target kept for backward compatibility
1084package-dir := $(srctree)/scripts/package
1085
Zach Brown031ecc62006-06-08 22:12:37 -07001086%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001087 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001088rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001089 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
1091
1092# Brief documentation of the typical targets used
1093# ---------------------------------------------------------------------------
1094
1095boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1096boards := $(notdir $(boards))
1097
1098help:
1099 @echo 'Cleaning targets:'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001100 @echo ' clean - remove most generated files but keep the config and'
1101 @echo ' enough build support to build external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 @echo ' mrproper - remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001103 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 @echo ''
1105 @echo 'Configuration targets:'
1106 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1107 @echo ''
1108 @echo 'Other generic targets:'
1109 @echo ' all - Build all targets marked with [*]'
1110 @echo '* vmlinux - Build the bare kernel'
1111 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001112 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 @echo ' dir/ - Build all files in dir and below'
1114 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001115 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 @echo ' rpm - Build a kernel as an RPM package'
1117 @echo ' tags/TAGS - Generate tags file for editors'
1118 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001119 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001120 @echo ' kernelversion - Output the version stored in Makefile'
David Woodhousef17b7ba2006-09-21 09:01:45 +01001121 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1122 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1123 fi
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001124 @echo ' (default: $(INSTALL_HDR_PATH))'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 @echo ''
1126 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 @echo ' checkstack - Generate a list of stack hogs'
1128 @echo ' namespacecheck - Name space analysis on compiled kernel'
David Woodhousef17b7ba2006-09-21 09:01:45 +01001129 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1130 echo ' headers_check - Sanity check on exported headers'; \
1131 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 @echo ''
1133 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001134 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 @echo ''
1136 @echo 'Documentation targets:'
1137 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1138 @echo ''
1139 @echo 'Architecture specific targets ($(ARCH)):'
1140 @$(if $(archhelp),$(archhelp),\
1141 echo ' No architecture specific help defined for $(ARCH)')
1142 @echo ''
1143 @$(if $(boards), \
1144 $(foreach b, $(boards), \
1145 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1146 echo '')
1147
1148 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001149 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001151 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1152 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 @echo ''
1154 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1155 @echo 'For further info see the ./README file'
1156
1157
1158# Documentation targets
1159# ---------------------------------------------------------------------------
1160%docs: scripts_basic FORCE
1161 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1162
1163else # KBUILD_EXTMOD
1164
1165###
1166# External module support.
1167# When building external modules the kernel used as basis is considered
1168# read-only, and no consistency checks are made and the make
1169# system is not used on the basis kernel. If updates are required
1170# in the basis kernel ordinary make commands (without M=...) must
1171# be used.
1172#
1173# The following are the only valid targets when building external
1174# modules.
1175# make M=dir clean Delete all automatically generated files
1176# make M=dir modules Make all modules in specified dir
1177# make M=dir Same as 'make M=dir modules'
1178# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001179# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180# Assumes install directory is already created
1181
1182# We are always building modules
1183KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001184PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185crmodverdir:
1186 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001187 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Paul Smith4f193362006-03-05 17:14:10 -05001189PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190$(objtree)/Module.symvers:
1191 @test -e $(objtree)/Module.symvers || ( \
1192 echo; \
1193 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1194 echo " is missing; modules will have no dependencies and modversions."; \
1195 echo )
1196
1197module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001198PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199$(module-dirs): crmodverdir $(objtree)/Module.symvers
1200 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1201
1202modules: $(module-dirs)
1203 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001204 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Paul Smith4f193362006-03-05 17:14:10 -05001206PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001207modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001208
Paul Smith4f193362006-03-05 17:14:10 -05001209install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1210PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001211_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001212 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001213 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214
Sam Ravnborga67dc212006-01-28 23:51:57 +01001215# Run depmod only is we have System.map and depmod is executable
1216quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1217 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1218 $(DEPMOD) -ae -F System.map \
1219 $(if $(strip $(INSTALL_MOD_PATH)), \
1220 -b $(INSTALL_MOD_PATH) -r) \
1221 $(KERNELRELEASE); \
1222 fi
1223
Paul Smith4f193362006-03-05 17:14:10 -05001224PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001225_emodinst_post: _emodinst_
1226 $(call cmd,depmod)
1227
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1229
Paul Smith4f193362006-03-05 17:14:10 -05001230PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231$(clean-dirs):
1232 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1233
1234clean: rm-dirs := $(MODVERDIR)
1235clean: $(clean-dirs)
1236 $(call cmd,rmdirs)
1237 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001238 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1240 -type f -print | xargs rm -f
1241
1242help:
1243 @echo ' Building external modules.'
1244 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1245 @echo ''
1246 @echo ' modules - default target, build the module(s)'
1247 @echo ' modules_install - install the module'
1248 @echo ' clean - remove generated files in module directory only'
1249 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001250
1251# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001252PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001253prepare: ;
1254scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255endif # KBUILD_EXTMOD
1256
1257# Generate tags for editors
1258# ---------------------------------------------------------------------------
1259
1260#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1261#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1262#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1263
George Anzingerf182ae62005-07-07 17:56:06 -07001264ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265__srctree =
1266else
1267__srctree = $(srctree)/
1268endif
1269
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001270ifeq ($(ALLSOURCE_ARCHS),)
1271ifeq ($(ARCH),um)
1272ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1273else
1274ALLINCLUDE_ARCHS := $(ARCH)
1275endif
1276else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001277#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001278ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1279endif
1280
Ian Campbella0674e82005-06-23 11:25:54 +01001281ALLSOURCE_ARCHS := $(ARCH)
1282
Masatake YAMATOe838db62006-06-22 12:21:20 +09001283define find-sources
1284 ( find $(__srctree) $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 \( -name include -o -name arch \) -prune -o \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001286 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001287 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1288 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001289 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001290 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001292 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 find $(__srctree)include $(RCS_FIND_IGNORE) \
1294 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001295 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001296 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001297 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001298 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001299 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001301 -name $1 -print )
1302endef
1303
1304define all-sources
1305 $(call find-sources,'*.[chS]')
1306endef
1307define all-kconfigs
1308 $(call find-sources,'Kconfig*')
1309endef
1310define all-defconfigs
1311 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312endef
1313
Aron Griffisda7c0402006-09-21 00:27:02 -04001314define xtags
1315 if $1 --version 2>&1 | grep -iq exuberant; then \
1316 $(all-sources) | xargs $1 -a \
1317 -I __initdata,__exitdata,__acquires,__releases \
1318 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1319 --extra=+f --c-kinds=+px; \
1320 $(all-kconfigs) | xargs $1 -a \
1321 --langdef=kconfig \
1322 --language-force=kconfig \
1323 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001324 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001325 --langdef=dotconfig \
1326 --language-force=dotconfig \
1327 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1328 elif $1 --version 2>&1 | grep -iq emacs; then \
1329 $(all-sources) | xargs $1 -a; \
1330 $(all-kconfigs) | xargs $1 -a \
1331 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001332 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001333 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1334 else \
1335 $(all-sources) | xargs $1 -a; \
1336 fi
1337endef
1338
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001340 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
1342quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001343 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344
1345cscope: FORCE
1346 $(call cmd,cscope-file)
1347 $(call cmd,cscope)
1348
1349quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001350define cmd_TAGS
1351 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001352 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001353endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001355TAGS: FORCE
1356 $(call cmd,TAGS)
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358quiet_cmd_tags = MAKE $@
1359define cmd_tags
1360 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001361 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362endef
1363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364tags: FORCE
1365 $(call cmd,tags)
1366
1367
1368# Scripts to check various things for consistency
1369# ---------------------------------------------------------------------------
1370
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371includecheck:
1372 find * $(RCS_FIND_IGNORE) \
1373 -name '*.[hcS]' -type f -print | sort \
1374 | xargs $(PERL) -w scripts/checkincludes.pl
1375
1376versioncheck:
1377 find * $(RCS_FIND_IGNORE) \
1378 -name '*.[hcS]' -type f -print | sort \
1379 | xargs $(PERL) -w scripts/checkversion.pl
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381namespacecheck:
1382 $(PERL) $(srctree)/scripts/namespace.pl
1383
1384endif #ifeq ($(config-targets),1)
1385endif #ifeq ($(mixed-targets),1)
1386
Roman Zippelc30a02e2006-06-08 22:12:50 -07001387PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001388
1389# Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1390# In the UML case, $(SUBARCH) is the name of the underlying
1391# architecture, while for all other arches, it is the same as $(ARCH).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392checkstack:
1393 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001394 $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
1396kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001397 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1398 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001399kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001400 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Sam Ravnborg06300b22006-01-25 07:13:18 +01001402# Single targets
1403# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001404# Single targets are compatible with:
1405# - build whith mixed source and output
1406# - build with separate output dir 'make O=...'
1407# - external modules
1408#
1409# target-dir => where to store outputfile
1410# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001411
Sam Ravnborg06300b22006-01-25 07:13:18 +01001412ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001413 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001414 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001415else
1416 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001417 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1418 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001419endif
1420
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001421%.s: %.c prepare scripts FORCE
1422 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1423%.i: %.c prepare scripts FORCE
1424 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1425%.o: %.c prepare scripts FORCE
1426 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1427%.lst: %.c prepare scripts FORCE
1428 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429%.s: %.S prepare scripts FORCE
1430 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431%.o: %.S prepare scripts FORCE
1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001433%.symtypes: %.c prepare scripts FORCE
1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001435
1436# Modules
1437/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001439 $(build)=$(build-dir)
1440%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001442 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001443 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001444
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445# FIXME Should go into a make.lib or something
1446# ===========================================================================
1447
1448quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1449 cmd_rmdirs = rm -rf $(rm-dirs)
1450
1451quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1452 cmd_rmfiles = rm -f $(rm-files)
1453
1454
1455a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1456 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001457 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
1459quiet_cmd_as_o_S = AS $@
1460cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1461
1462# read all saved command lines
1463
1464targets := $(wildcard $(sort $(targets)))
1465cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1466
1467ifneq ($(cmd_files),)
1468 $(cmd_files): ; # Do not try to update included dependency files
1469 include $(cmd_files)
1470endif
1471
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1473# Usage:
1474# $(Q)$(MAKE) $(clean)=dir
1475clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1476
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477endif # skip-makefile
1478
Paul Smith4f193362006-03-05 17:14:10 -05001479PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001481
1482
1483# Declare the contents of the .PHONY variable as phony. We keep that
1484# information in a variable se we can use it in if_changed and friends.
1485.PHONY: $(PHONY)