blob: f732e75be43d1dd9449efbd99f7e646da26393c0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsd223a602006-10-04 19:57:05 -07003SUBLEVEL = 19
Linus Torvalds0215ffb2006-11-29 13:57:37 -08004EXTRAVERSION =
Linus Torvaldse478bec2006-09-19 20:42:06 -07005NAME=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
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
15# (this increases performance and avoid hard-to-debug behavour);
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040047# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
111ifneq ($(KBUILD_OUTPUT),)
112# Invoke a second make in the output directory, passing relevant variables
113# check that the output directory actually exists
114saved-output := $(KBUILD_OUTPUT)
115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116$(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
118
Paul Smith4f193362006-03-05 17:14:10 -0500119PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800121$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126# Leave processing to above invocation of make
127skip-makefile := 1
128endif # ifneq ($(KBUILD_OUTPUT),)
129endif # ifeq ($(KBUILD_SRC),)
130
131# We process the rest of the Makefile if this is the final invocation of make
132ifeq ($(skip-makefile),)
133
134# If building an external module we do not care about the all: rule
135# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500136PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137ifeq ($(KBUILD_EXTMOD),)
138_all: all
139else
140_all: modules
141endif
142
143srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
144TOPDIR := $(srctree)
145# FIXME - TOPDIR is obsolete, use srctree/objtree
146objtree := $(CURDIR)
147src := $(srctree)
148obj := $(objtree)
149
Mattia Dongili0f558c32006-02-19 13:50:37 +0100150VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152export srctree objtree VPATH TOPDIR
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155# SUBARCH tells the usermode build what the underlying arch is. That is set
156# first, and if a usermode build is happening, the "ARCH=um" on the command
157# line overrides the setting of ARCH below. If a native build is happening,
158# then ARCH is assigned, getting whatever value it gets normally, and
159# SUBARCH is subsequently ignored.
160
161SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166# Cross compiling and selecting different set of gcc/bin-utils
167# ---------------------------------------------------------------------------
168#
169# When performing cross compilation for other architectures ARCH shall be set
170# to the target architecture. (See arch/* for the possibilities).
171# ARCH can be set during invocation of make:
172# make ARCH=ia64
173# Another way is to have ARCH set in the environment.
174# The default ARCH is the host where make is executed.
175
176# CROSS_COMPILE specify the prefix used for all executables used
177# during compilation. Only gcc and related bin-utils executables
178# are prefixed with $(CROSS_COMPILE).
179# CROSS_COMPILE can be set on the command line
180# make CROSS_COMPILE=ia64-linux-
181# Alternatively CROSS_COMPILE can be set in the environment.
182# Default value for CROSS_COMPILE is not to prefix executables
183# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
184
185ARCH ?= $(SUBARCH)
186CROSS_COMPILE ?=
187
188# Architecture as present in compile.h
189UTS_MACHINE := $(ARCH)
190
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700191KCONFIG_CONFIG ?= .config
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193# SHELL used by kbuild
194CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
197
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200198HOSTCC = gcc
199HOSTCXX = g++
200HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
201HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200203# Decide whether to build built-in, modular, or both.
204# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206KBUILD_MODULES :=
207KBUILD_BUILTIN := 1
208
209# If we have only "make modules", don't compile built-in objects.
210# When we're building modules with modversions, we need to consider
211# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200212# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
214ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
216endif
217
218# If we have "make <whatever> modules", compile modules
219# in addition to whatever we do anyway.
220# Just "make" or "make all" shall build modules as well
221
222ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
223 KBUILD_MODULES := 1
224endif
225
226ifeq ($(MAKECMDGOALS),)
227 KBUILD_MODULES := 1
228endif
229
Sam Ravnborge579d352005-07-27 08:10:10 +0200230export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
232
233# Beautify output
234# ---------------------------------------------------------------------------
235#
236# Normally, we echo the whole command before executing it. By making
237# that echo $($(quiet)$(cmd)), we now have the possibility to set
238# $(quiet) to choose other forms of output instead, e.g.
239#
240# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
242#
243# If $(quiet) is empty, the whole command will be printed.
244# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246# the variable $(silent_cmd_cc_o_c) doesn't exist.
247#
Adrian Bunka58a4142006-01-10 00:08:17 +0100248# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249# for commands that shall be hidden in non-verbose mode.
250#
251# $(Q)ln $@ :<
252#
253# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254# If KBUILD_VERBOSE equals 1 then the above command is displayed.
255
256ifeq ($(KBUILD_VERBOSE),1)
257 quiet =
258 Q =
259else
260 quiet=quiet_
261 Q = @
262endif
263
264# If the user is running make -s (silent mode), suppress echoing of
265# commands
266
267ifneq ($(findstring s,$(MAKEFLAGS)),)
268 quiet=silent_
269endif
270
271export quiet Q KBUILD_VERBOSE
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274# Look for make include files relative to root of kernel src
275MAKEFLAGS += --include-dir=$(srctree)
276
Oleg Verych15964862006-12-10 02:18:40 -0800277# We need some generic definitions.
278include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280# Make variables (CC, etc...)
281
282AS = $(CROSS_COMPILE)as
283LD = $(CROSS_COMPILE)ld
284CC = $(CROSS_COMPILE)gcc
285CPP = $(CC) -E
286AR = $(CROSS_COMPILE)ar
287NM = $(CROSS_COMPILE)nm
288STRIP = $(CROSS_COMPILE)strip
289OBJCOPY = $(CROSS_COMPILE)objcopy
290OBJDUMP = $(CROSS_COMPILE)objdump
291AWK = awk
292GENKSYMS = scripts/genksyms/genksyms
293DEPMOD = /sbin/depmod
294KALLSYMS = scripts/kallsyms
295PERL = perl
296CHECK = sparse
297
Al Viroaf4ca452005-10-21 02:55:38 -0400298CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299MODFLAGS = -DMODULE
300CFLAGS_MODULE = $(MODFLAGS)
301AFLAGS_MODULE = $(MODFLAGS)
302LDFLAGS_MODULE = -r
303CFLAGS_KERNEL =
304AFLAGS_KERNEL =
305
306
307# Use LINUXINCLUDE when you must reference the include/ directory.
308# Needed to be compatible with the O= option
309LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800311 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
314
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200315CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common
317AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700319# Read KERNELRELEASE from include/config/kernel.release (if it exists)
320KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100321KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100322
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200323export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
324export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
325export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
326export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200329export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
331
332# When compiling out-of-tree modules, put MODVERDIR in the module
333# tree rather than in the kernel tree. The kernel tree might
334# even be read-only.
335export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337# Files to ignore in find ... statements
338
Trond Myklebust406119f2005-10-27 14:46:53 -0400339RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
340export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342# ===========================================================================
343# Rules shared between *config targets and build targets
344
345# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500346PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347scripts_basic:
348 $(Q)$(MAKE) $(build)=scripts/basic
349
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200350# To avoid any implicit rule to kick in, define an empty command.
351scripts/basic/%: scripts_basic ;
352
Paul Smith4f193362006-03-05 17:14:10 -0500353PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200354# outputmakefile generates a Makefile in the output directory, if using a
355# separate output directory. This allows convenient use of make in the
356# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200358ifneq ($(KBUILD_SRC),)
359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
360 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
361endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363# To make sure we do not include .config for any of the *config targets
364# catch them early, and hand them over to scripts/kconfig/Makefile
365# It is allowed to specify more targets when calling make, including
366# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200367# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368# Detect when mixed targets is specified, and make a second invocation
369# of make so .config is not included in this case either (for *config).
370
371no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700372 cscope TAGS tags help %docs check% \
Sam Ravnborg667918a2006-07-08 00:46:25 +0200373 include/linux/version.h headers_% \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700374 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376config-targets := 0
377mixed-targets := 0
378dot-config := 1
379
380ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
381 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 dot-config := 0
383 endif
384endif
385
386ifeq ($(KBUILD_EXTMOD),)
387 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
388 config-targets := 1
389 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
390 mixed-targets := 1
391 endif
392 endif
393endif
394
395ifeq ($(mixed-targets),1)
396# ===========================================================================
397# We're called with mixed targets (*config and build targets).
398# Handle them one by one.
399
400%:: FORCE
401 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
402
403else
404ifeq ($(config-targets),1)
405# ===========================================================================
406# *config targets only - make sure prerequisites are updated, and descend
407# in scripts/kconfig to make the *config target
408
409# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
410# KBUILD_DEFCONFIG may point out an alternative default configuration
411# used for 'make defconfig'
412include $(srctree)/arch/$(ARCH)/Makefile
413export KBUILD_DEFCONFIG
414
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200415config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700416 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 $(Q)$(MAKE) $(build)=scripts/kconfig $@
418
419else
420# ===========================================================================
421# Build targets only - this includes vmlinux, arch specific targets, clean
422# targets and others. In general all targets except *config targets.
423
424ifeq ($(KBUILD_EXTMOD),)
425# Additional helpers built in scripts/
426# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200427# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500428PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700429scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 $(Q)$(MAKE) $(build)=$(@)
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432# Objects we will link into vmlinux / subdirs we need to visit
433init-y := init/
434drivers-y := drivers/ sound/
435net-y := net/
436libs-y := lib/
437core-y := usr/
438endif # KBUILD_EXTMOD
439
440ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200441# Read in config
442-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200444ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445# Read in dependencies to all Kconfig* files, make sure to run
446# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700447-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700450$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Roman Zippelc955cca2006-06-08 22:12:39 -0700452# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100453# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200454# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100455# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700456include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200459# external modules needs include/linux/autoconf.h and include/config/auto.conf
460# but do not care if they are up-to-date. Use auto.conf to trigger the test
461PHONY += include/config/auto.conf
462
463include/config/auto.conf:
464 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
465 echo; \
466 echo " ERROR: Kernel configuration is invalid."; \
467 echo " include/linux/autoconf.h or $@ are missing."; \
468 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
469 echo; \
470 /bin/false)
471
472endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474else
475# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700476include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200477endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479# The all: target is the default when no target is given on the
480# command line.
481# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200482# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483all: vmlinux
484
485ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486CFLAGS += -Os
487else
488CFLAGS += -O2
489endif
490
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200491include $(srctree)/arch/$(ARCH)/Makefile
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700494CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495else
496CFLAGS += -fomit-frame-pointer
497endif
498
Jan Beulich604bf5a2006-03-24 03:16:19 -0800499ifdef CONFIG_UNWIND_INFO
500CFLAGS += -fasynchronous-unwind-tables
Jan Beulich690a9732006-10-21 18:37:01 +0200501LDFLAGS_vmlinux += --eh-frame-hdr
Jan Beulich604bf5a2006-03-24 03:16:19 -0800502endif
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
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700744ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100745 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700746endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 $(call if_changed_rule,vmlinux__)
Sam Ravnborg12715d22006-08-08 20:43:39 +0200748 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200749 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
751# The actual objects are generated when descending,
752# make sure no implicit rule kicks in
753$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
754
755# Handle descending into subdirectories listed in $(vmlinux-dirs)
756# Preset locale variables to speed up the build process. Limit locale
757# tweaks to this spot to avoid wrong language settings when running
758# make menuconfig etc.
759# Error messages still appears in the original language
760
Paul Smith4f193362006-03-05 17:14:10 -0500761PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200762$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 $(Q)$(MAKE) $(build)=$@
764
Sam Ravnborgcb584552006-01-09 21:20:34 +0100765# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100766#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400767# The KERNELRELEASE value built here is stored in the file
768# include/config/kernel.release, and is used when executing several
769# make targets, such as "make install" or "make modules_install."
770#
771# The eventual kernel release string consists of the following fields,
772# shown in a hierarchical format to show how smaller parts are concatenated
773# to form the larger and final value, with values coming from places like
774# the Makefile, kernel config options, make command line options and/or
775# SCM tag information.
776#
777# $(KERNELVERSION)
778# $(VERSION) eg, 2
779# $(PATCHLEVEL) eg, 6
780# $(SUBLEVEL) eg, 18
781# $(EXTRAVERSION) eg, -rc6
782# $(localver-full)
783# $(localver)
784# localversion* (all localversion* files)
785# $(CONFIG_LOCALVERSION) (from kernel config setting)
786# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
787# ./scripts/setlocalversion (SCM tag, if one exists)
788# $(LOCALVERSION) (from make command line if provided)
789#
790# Note how the final $(localver-auto) string is included *only* if the
791# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
792# moment, only git is supported but other SCMs can edit the script
793# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100794
795nullstring :=
796space := $(nullstring) # end of line
797
798___localver = $(objtree)/localversion* $(srctree)/localversion*
799__localver = $(sort $(wildcard $(___localver)))
800# skip backup files (containing '~')
801_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
802
803localver = $(subst $(space),, \
804 $(shell cat /dev/null $(_localver)) \
805 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200806
Sam Ravnborgcb584552006-01-09 21:20:34 +0100807# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
808# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200809# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100810#
811# Currently, only git is supported.
812# Other SCMs can edit scripts/setlocalversion and add the appropriate
813# checks as needed.
814ifdef CONFIG_LOCALVERSION_AUTO
815 _localver-auto = $(shell $(CONFIG_SHELL) \
816 $(srctree)/scripts/setlocalversion $(srctree))
817 localver-auto = $(LOCALVERSION)$(_localver-auto)
818endif
819
820localver-full = $(localver)$(localver-auto)
821
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700822# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100823kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700824include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100825 $(Q)rm -f $@
826 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100827
828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200830# or the modules are listed in "prepare".
831# A multi level approach is used. prepareN is processed before prepareN-1.
832# archprepare is used in arch Makefiles and when processed asm symlink,
833# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200835# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500836PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200837
838# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500839PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200841# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842# and if so do:
843# 1) Check that make has not been executed in the kernel src $(srctree)
844# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700845prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846ifneq ($(KBUILD_SRC),)
847 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700848 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 echo " $(srctree) is not clean, please run 'make mrproper'";\
850 echo " in the '$(srctree)' directory.";\
851 /bin/false; \
852 fi;
853 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
854 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
855endif
856
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200857# prepare2 creates a makefile if using a separate output directory
858prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200860prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
861 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400864 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865endif
866
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200867archprepare: prepare1 scripts_basic
868
869prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200870 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200873prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200875# Leave this as default for preprocessing vmlinux.lds.S, which is now
876# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
878export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
879
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200880# FIXME: The asm symlink changes when $(ARCH) changes. That's
881# hard to detect, but I suppose "make mrproper" is a good idea
882# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
884include/asm:
885 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
886 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
887 @ln -fsn asm-$(ARCH) $@
888
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889# Generate some files
890# ---------------------------------------------------------------------------
891
892# KERNELRELEASE can change from a few different places, meaning version.h
893# needs to be updated, so this check is forced on all builds
894
895uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200896define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200898 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
899 exit 1; \
900 fi; \
901 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902endef
903
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200904define filechk_version.h
905 (echo \#define LINUX_VERSION_CODE $(shell \
906 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
907 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
908endef
909
910include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 $(call filechk,version.h)
912
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200913include/linux/utsrelease.h: include/config/kernel.release FORCE
914 $(call filechk,utsrelease.h)
915
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916# ---------------------------------------------------------------------------
917
Paul Smith4f193362006-03-05 17:14:10 -0500918PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919depend dep:
920 @echo '*** Warning: make $@ is unnecessary now.'
921
922# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100923# Kernel headers
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700924INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100925export INSTALL_HDR_PATH
926
David Woodhouse6d716272006-09-24 22:16:03 +0100927HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
928
929PHONY += headers_install_all
Linus Torvalds398477d2006-09-24 14:55:52 -0700930headers_install_all: include/linux/version.h scripts_basic FORCE
931 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100932 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700933 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100934 done
935
David Woodhouse8d730cf2006-06-18 11:58:39 +0100936PHONY += headers_install
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200937headers_install: include/linux/version.h scripts_basic FORCE
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100938 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100939 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
940 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200941 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200942 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100943
David Woodhouse68475352006-06-18 12:02:10 +0100944PHONY += headers_check
945headers_check: headers_install
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200946 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100947
David Woodhouse8d730cf2006-06-18 11:58:39 +0100948# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949# Modules
950
951ifdef CONFIG_MODULES
952
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200953# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
955all: modules
956
957# Build modules
958
Paul Smith4f193362006-03-05 17:14:10 -0500959PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
961 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200962 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
964
965# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500966PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200967modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
969# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500970PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971modules_install: _modinst_ _modinst_post
972
Paul Smith4f193362006-03-05 17:14:10 -0500973PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700975 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 echo "Warning: you may need to install module-init-tools"; \
977 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
978 sleep 1; \
979 fi
980 @rm -rf $(MODLIB)/kernel
981 @rm -f $(MODLIB)/source
982 @mkdir -p $(MODLIB)/kernel
983 @ln -s $(srctree) $(MODLIB)/source
984 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
985 rm -f $(MODLIB)/build ; \
986 ln -s $(objtree) $(MODLIB)/build ; \
987 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200988 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
990# If System.map exists, run depmod. This deliberately does not have a
991# dependency on System.map since that would run the dependency tree on
992# vmlinux. This depmod is only for convenience to give the initial
993# boot a modules.dep even before / is mounted read-write. However the
994# boot script depmod is the master version.
995ifeq "$(strip $(INSTALL_MOD_PATH))" ""
996depmod_opts :=
997else
998depmod_opts := -b $(INSTALL_MOD_PATH) -r
999endif
Paul Smith4f193362006-03-05 17:14:10 -05001000PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001_modinst_post: _modinst_
1002 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1003
1004else # CONFIG_MODULES
1005
1006# Modules not configured
1007# ---------------------------------------------------------------------------
1008
1009modules modules_install: FORCE
1010 @echo
1011 @echo "The present kernel configuration has modules disabled."
1012 @echo "Type 'make config' and enable loadable module support."
1013 @echo "Then build a kernel with module support enabled."
1014 @echo
1015 @exit 1
1016
1017endif # CONFIG_MODULES
1018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019###
1020# Cleaning is done on three levels.
1021# make clean Delete most generated files
1022# Leave enough to build external modules
1023# make mrproper Delete the current configuration, and all generated files
1024# make distclean Remove editor backup files, patch leftover files and the like
1025
1026# Directories & files removed with 'make clean'
1027CLEAN_DIRS += $(MODVERDIR)
1028CLEAN_FILES += vmlinux System.map \
1029 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1030
1031# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001032MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001033MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001034 include/linux/autoconf.h include/linux/version.h \
1035 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001036 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
1038# clean - Delete most, but leave enough to build external modules
1039#
1040clean: rm-dirs := $(CLEAN_DIRS)
1041clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001042clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
Paul Smith4f193362006-03-05 17:14:10 -05001044PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045$(clean-dirs):
1046 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1047
1048clean: archclean $(clean-dirs)
1049 $(call cmd,rmdirs)
1050 $(call cmd,rmfiles)
1051 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001052 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001053 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1054 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 -type f -print | xargs rm -f
1056
1057# mrproper - Delete all generated files, including .config
1058#
1059mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1060mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1061mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1062
Paul Smith4f193362006-03-05 17:14:10 -05001063PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064$(mrproper-dirs):
1065 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1066
1067mrproper: clean archmrproper $(mrproper-dirs)
1068 $(call cmd,rmdirs)
1069 $(call cmd,rmfiles)
1070
1071# distclean
1072#
Paul Smith4f193362006-03-05 17:14:10 -05001073PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075distclean: mrproper
1076 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001077 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001079 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1081 -type f -print | xargs rm -f
1082
1083
1084# Packaging of the kernel to various formats
1085# ---------------------------------------------------------------------------
1086# rpm target kept for backward compatibility
1087package-dir := $(srctree)/scripts/package
1088
Zach Brown031ecc62006-06-08 22:12:37 -07001089%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001090 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001091rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001092 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
1094
1095# Brief documentation of the typical targets used
1096# ---------------------------------------------------------------------------
1097
1098boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1099boards := $(notdir $(boards))
1100
1101help:
1102 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001103 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001104 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001105 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001106 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 @echo ''
1108 @echo 'Configuration targets:'
1109 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1110 @echo ''
1111 @echo 'Other generic targets:'
1112 @echo ' all - Build all targets marked with [*]'
1113 @echo '* vmlinux - Build the bare kernel'
1114 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001115 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 @echo ' dir/ - Build all files in dir and below'
1117 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001118 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 @echo ' rpm - Build a kernel as an RPM package'
1120 @echo ' tags/TAGS - Generate tags file for editors'
1121 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001122 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001123 @echo ' kernelversion - Output the version stored in Makefile'
David Woodhousef17b7ba2006-09-21 09:01:45 +01001124 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1125 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1126 fi
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001127 @echo ' (default: $(INSTALL_HDR_PATH))'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 @echo ''
1129 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 @echo ' checkstack - Generate a list of stack hogs'
1131 @echo ' namespacecheck - Name space analysis on compiled kernel'
David Woodhousef17b7ba2006-09-21 09:01:45 +01001132 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1133 echo ' headers_check - Sanity check on exported headers'; \
1134 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 @echo ''
1136 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001137 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 @echo ''
1139 @echo 'Documentation targets:'
1140 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1141 @echo ''
1142 @echo 'Architecture specific targets ($(ARCH)):'
1143 @$(if $(archhelp),$(archhelp),\
1144 echo ' No architecture specific help defined for $(ARCH)')
1145 @echo ''
1146 @$(if $(boards), \
1147 $(foreach b, $(boards), \
1148 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1149 echo '')
1150
1151 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001152 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001154 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1155 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 @echo ''
1157 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1158 @echo 'For further info see the ./README file'
1159
1160
1161# Documentation targets
1162# ---------------------------------------------------------------------------
1163%docs: scripts_basic FORCE
1164 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1165
1166else # KBUILD_EXTMOD
1167
1168###
1169# External module support.
1170# When building external modules the kernel used as basis is considered
1171# read-only, and no consistency checks are made and the make
1172# system is not used on the basis kernel. If updates are required
1173# in the basis kernel ordinary make commands (without M=...) must
1174# be used.
1175#
1176# The following are the only valid targets when building external
1177# modules.
1178# make M=dir clean Delete all automatically generated files
1179# make M=dir modules Make all modules in specified dir
1180# make M=dir Same as 'make M=dir modules'
1181# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001182# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183# Assumes install directory is already created
1184
1185# We are always building modules
1186KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001187PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188crmodverdir:
1189 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001190 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191
Paul Smith4f193362006-03-05 17:14:10 -05001192PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193$(objtree)/Module.symvers:
1194 @test -e $(objtree)/Module.symvers || ( \
1195 echo; \
1196 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1197 echo " is missing; modules will have no dependencies and modversions."; \
1198 echo )
1199
1200module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001201PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202$(module-dirs): crmodverdir $(objtree)/Module.symvers
1203 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1204
1205modules: $(module-dirs)
1206 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001207 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Paul Smith4f193362006-03-05 17:14:10 -05001209PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001210modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001211
Paul Smith4f193362006-03-05 17:14:10 -05001212install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1213PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001214_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001215 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001216 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Sam Ravnborga67dc212006-01-28 23:51:57 +01001218# Run depmod only is we have System.map and depmod is executable
1219quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1220 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1221 $(DEPMOD) -ae -F System.map \
1222 $(if $(strip $(INSTALL_MOD_PATH)), \
1223 -b $(INSTALL_MOD_PATH) -r) \
1224 $(KERNELRELEASE); \
1225 fi
1226
Paul Smith4f193362006-03-05 17:14:10 -05001227PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001228_emodinst_post: _emodinst_
1229 $(call cmd,depmod)
1230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1232
Paul Smith4f193362006-03-05 17:14:10 -05001233PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234$(clean-dirs):
1235 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1236
1237clean: rm-dirs := $(MODVERDIR)
1238clean: $(clean-dirs)
1239 $(call cmd,rmdirs)
1240 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001241 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1243 -type f -print | xargs rm -f
1244
1245help:
1246 @echo ' Building external modules.'
1247 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1248 @echo ''
1249 @echo ' modules - default target, build the module(s)'
1250 @echo ' modules_install - install the module'
1251 @echo ' clean - remove generated files in module directory only'
1252 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001253
1254# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001255PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001256prepare: ;
1257scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258endif # KBUILD_EXTMOD
1259
1260# Generate tags for editors
1261# ---------------------------------------------------------------------------
1262
1263#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1264#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1265#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1266
George Anzingerf182ae62005-07-07 17:56:06 -07001267ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268__srctree =
1269else
1270__srctree = $(srctree)/
1271endif
1272
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001273ifeq ($(ALLSOURCE_ARCHS),)
1274ifeq ($(ARCH),um)
1275ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1276else
1277ALLINCLUDE_ARCHS := $(ARCH)
1278endif
1279else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001280#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001281ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1282endif
1283
Ian Campbella0674e82005-06-23 11:25:54 +01001284ALLSOURCE_ARCHS := $(ARCH)
1285
Masatake YAMATOe838db62006-06-22 12:21:20 +09001286define find-sources
1287 ( find $(__srctree) $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 \( -name include -o -name arch \) -prune -o \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001289 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001290 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1291 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001292 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001293 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001295 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 find $(__srctree)include $(RCS_FIND_IGNORE) \
1297 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001298 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001299 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001300 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001301 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001302 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001304 -name $1 -print )
1305endef
1306
1307define all-sources
1308 $(call find-sources,'*.[chS]')
1309endef
1310define all-kconfigs
1311 $(call find-sources,'Kconfig*')
1312endef
1313define all-defconfigs
1314 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315endef
1316
Aron Griffisda7c0402006-09-21 00:27:02 -04001317define xtags
1318 if $1 --version 2>&1 | grep -iq exuberant; then \
1319 $(all-sources) | xargs $1 -a \
1320 -I __initdata,__exitdata,__acquires,__releases \
1321 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001322 --extra=+f --c-kinds=+px \
1323 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001324 $(all-kconfigs) | xargs $1 -a \
1325 --langdef=kconfig \
1326 --language-force=kconfig \
1327 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001328 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001329 --langdef=dotconfig \
1330 --language-force=dotconfig \
1331 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1332 elif $1 --version 2>&1 | grep -iq emacs; then \
1333 $(all-sources) | xargs $1 -a; \
1334 $(all-kconfigs) | xargs $1 -a \
1335 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001336 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001337 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1338 else \
1339 $(all-sources) | xargs $1 -a; \
1340 fi
1341endef
1342
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001344 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
1346quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001347 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
1349cscope: FORCE
1350 $(call cmd,cscope-file)
1351 $(call cmd,cscope)
1352
1353quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001354define cmd_TAGS
1355 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001356 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001357endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001359TAGS: FORCE
1360 $(call cmd,TAGS)
1361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362quiet_cmd_tags = MAKE $@
1363define cmd_tags
1364 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001365 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366endef
1367
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368tags: FORCE
1369 $(call cmd,tags)
1370
1371
1372# Scripts to check various things for consistency
1373# ---------------------------------------------------------------------------
1374
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375includecheck:
1376 find * $(RCS_FIND_IGNORE) \
1377 -name '*.[hcS]' -type f -print | sort \
1378 | xargs $(PERL) -w scripts/checkincludes.pl
1379
1380versioncheck:
1381 find * $(RCS_FIND_IGNORE) \
1382 -name '*.[hcS]' -type f -print | sort \
1383 | xargs $(PERL) -w scripts/checkversion.pl
1384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385namespacecheck:
1386 $(PERL) $(srctree)/scripts/namespace.pl
1387
1388endif #ifeq ($(config-targets),1)
1389endif #ifeq ($(mixed-targets),1)
1390
Roman Zippelc30a02e2006-06-08 22:12:50 -07001391PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001392
Jeff Dike011e3a92006-12-13 00:34:12 -08001393# UML needs a little special treatment here. It wants to use the host
1394# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1395# else wants $(ARCH), including people doing cross-builds, which means
1396# that $(SUBARCH) doesn't work here.
1397ifeq ($(ARCH), um)
1398CHECKSTACK_ARCH := $(SUBARCH)
1399else
1400CHECKSTACK_ARCH := $(ARCH)
1401endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402checkstack:
1403 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001404 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
1406kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001407 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1408 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001409kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001410 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
Sam Ravnborg06300b22006-01-25 07:13:18 +01001412# Single targets
1413# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001414# Single targets are compatible with:
1415# - build whith mixed source and output
1416# - build with separate output dir 'make O=...'
1417# - external modules
1418#
1419# target-dir => where to store outputfile
1420# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001421
Sam Ravnborg06300b22006-01-25 07:13:18 +01001422ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001423 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001424 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001425else
1426 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001427 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1428 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001429endif
1430
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001431%.s: %.c prepare scripts FORCE
1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1433%.i: %.c prepare scripts FORCE
1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1435%.o: %.c prepare scripts FORCE
1436 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1437%.lst: %.c prepare scripts FORCE
1438 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1439%.s: %.S prepare scripts FORCE
1440 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1441%.o: %.S prepare scripts FORCE
1442 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001443%.symtypes: %.c prepare scripts FORCE
1444 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001445
1446# Modules
1447/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001448 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001449 $(build)=$(build-dir)
1450%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001451 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001452 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001453 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001454
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455# FIXME Should go into a make.lib or something
1456# ===========================================================================
1457
1458quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1459 cmd_rmdirs = rm -rf $(rm-dirs)
1460
1461quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1462 cmd_rmfiles = rm -f $(rm-files)
1463
1464
1465a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1466 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001467 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
1469quiet_cmd_as_o_S = AS $@
1470cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1471
1472# read all saved command lines
1473
1474targets := $(wildcard $(sort $(targets)))
1475cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1476
1477ifneq ($(cmd_files),)
1478 $(cmd_files): ; # Do not try to update included dependency files
1479 include $(cmd_files)
1480endif
1481
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1483# Usage:
1484# $(Q)$(MAKE) $(clean)=dir
1485clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1486
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487endif # skip-makefile
1488
Paul Smith4f193362006-03-05 17:14:10 -05001489PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001491
Oleg Verych15964862006-12-10 02:18:40 -08001492# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1493Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001494
1495# Declare the contents of the .PHONY variable as phony. We keep that
1496# information in a variable se we can use it in if_changed and friends.
1497.PHONY: $(PHONY)