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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds2ddcca32008-05-03 11:59:44 -07003SUBLEVEL = 26
Linus Torvaldsbce7f792008-07-13 14:51:29 -07004EXTRAVERSION =
Linus Torvalds5dd34572008-06-12 14:22:24 -07005NAME = Rotary Wombat
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
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# 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 := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114ifneq ($(KBUILD_OUTPUT),)
115# Invoke a second make in the output directory, passing relevant variables
116# check that the output directory actually exists
117saved-output := $(KBUILD_OUTPUT)
118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119$(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Milton Miller0b357862007-09-21 18:09:02 -0500122PHONY += $(MAKECMDGOALS) sub-make
123
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500125 $(Q)@:
126
127sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133# Leave processing to above invocation of make
134skip-makefile := 1
135endif # ifneq ($(KBUILD_OUTPUT),)
136endif # ifeq ($(KBUILD_SRC),)
137
138# We process the rest of the Makefile if this is the final invocation of make
139ifeq ($(skip-makefile),)
140
141# If building an external module we do not care about the all: rule
142# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500143PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144ifeq ($(KBUILD_EXTMOD),)
145_all: all
146else
147_all: modules
148endif
149
150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151TOPDIR := $(srctree)
152# FIXME - TOPDIR is obsolete, use srctree/objtree
153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159export srctree objtree VPATH TOPDIR
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt12760cb2007-11-23 14:24:25 +0900172 -e s/sh.*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100192export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200197UTS_MACHINE := $(ARCH)
198SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Sam Ravnborgd746d642007-11-12 20:14:19 +0100200# Additional ARCH settings for x86
201ifeq ($(ARCH),i386)
202 SRCARCH := x86
203endif
204ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200207
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200208# Where to locate arch specific headers
209hdr-arch := $(SRCARCH)
210
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700211KCONFIG_CONFIG ?= .config
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213# SHELL used by kbuild
214CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
215 else if [ -x /bin/bash ]; then echo /bin/bash; \
216 else echo sh; fi ; fi)
217
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200218HOSTCC = gcc
219HOSTCXX = g++
220HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
221HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200223# Decide whether to build built-in, modular, or both.
224# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226KBUILD_MODULES :=
227KBUILD_BUILTIN := 1
228
229# If we have only "make modules", don't compile built-in objects.
230# When we're building modules with modversions, we need to consider
231# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200232# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234ifeq ($(MAKECMDGOALS),modules)
235 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
236endif
237
238# If we have "make <whatever> modules", compile modules
239# in addition to whatever we do anyway.
240# Just "make" or "make all" shall build modules as well
241
242ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
243 KBUILD_MODULES := 1
244endif
245
246ifeq ($(MAKECMDGOALS),)
247 KBUILD_MODULES := 1
248endif
249
Sam Ravnborge579d352005-07-27 08:10:10 +0200250export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
252
253# Beautify output
254# ---------------------------------------------------------------------------
255#
256# Normally, we echo the whole command before executing it. By making
257# that echo $($(quiet)$(cmd)), we now have the possibility to set
258# $(quiet) to choose other forms of output instead, e.g.
259#
260# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
261# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
262#
263# If $(quiet) is empty, the whole command will be printed.
264# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200265# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266# the variable $(silent_cmd_cc_o_c) doesn't exist.
267#
Adrian Bunka58a4142006-01-10 00:08:17 +0100268# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269# for commands that shall be hidden in non-verbose mode.
270#
271# $(Q)ln $@ :<
272#
273# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
274# If KBUILD_VERBOSE equals 1 then the above command is displayed.
275
276ifeq ($(KBUILD_VERBOSE),1)
277 quiet =
278 Q =
279else
280 quiet=quiet_
281 Q = @
282endif
283
284# If the user is running make -s (silent mode), suppress echoing of
285# commands
286
287ifneq ($(findstring s,$(MAKEFLAGS)),)
288 quiet=silent_
289endif
290
291export quiet Q KBUILD_VERBOSE
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294# Look for make include files relative to root of kernel src
295MAKEFLAGS += --include-dir=$(srctree)
296
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100297# We need some generic definitions (do not try to remake the file).
298$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800299include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301# Make variables (CC, etc...)
302
303AS = $(CROSS_COMPILE)as
304LD = $(CROSS_COMPILE)ld
305CC = $(CROSS_COMPILE)gcc
306CPP = $(CC) -E
307AR = $(CROSS_COMPILE)ar
308NM = $(CROSS_COMPILE)nm
309STRIP = $(CROSS_COMPILE)strip
310OBJCOPY = $(CROSS_COMPILE)objcopy
311OBJDUMP = $(CROSS_COMPILE)objdump
312AWK = awk
313GENKSYMS = scripts/genksyms/genksyms
314DEPMOD = /sbin/depmod
315KALLSYMS = scripts/kallsyms
316PERL = perl
317CHECK = sparse
318
Al Viroaf4ca452005-10-21 02:55:38 -0400319CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320MODFLAGS = -DMODULE
321CFLAGS_MODULE = $(MODFLAGS)
322AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700323LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324CFLAGS_KERNEL =
325AFLAGS_KERNEL =
326
327
328# Use LINUXINCLUDE when you must reference the include/ directory.
329# Needed to be compatible with the O= option
330LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100331 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200332 -I$(srctree)/arch/$(hdr-arch)/include \
333 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Sam Ravnborg06c50402007-10-15 22:17:25 +0200335KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200337KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700338 -fno-strict-aliasing -fno-common \
339 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200340KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700342# Read KERNELRELEASE from include/config/kernel.release (if it exists)
343KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100344KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100345
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200346export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100347export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200348export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
349export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Sam Ravnborg06c50402007-10-15 22:17:25 +0200351export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200352export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200353export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
355# When compiling out-of-tree modules, put MODVERDIR in the module
356# tree rather than in the kernel tree. The kernel tree might
357# even be read-only.
358export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360# Files to ignore in find ... statements
361
Trond Myklebust406119f2005-10-27 14:46:53 -0400362RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
363export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365# ===========================================================================
366# Rules shared between *config targets and build targets
367
368# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500369PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370scripts_basic:
371 $(Q)$(MAKE) $(build)=scripts/basic
372
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200373# To avoid any implicit rule to kick in, define an empty command.
374scripts/basic/%: scripts_basic ;
375
Paul Smith4f193362006-03-05 17:14:10 -0500376PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200377# outputmakefile generates a Makefile in the output directory, if using a
378# separate output directory. This allows convenient use of make in the
379# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200381ifneq ($(KBUILD_SRC),)
382 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
383 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
384endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386# To make sure we do not include .config for any of the *config targets
387# catch them early, and hand them over to scripts/kconfig/Makefile
388# It is allowed to specify more targets when calling make, including
389# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200390# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391# Detect when mixed targets is specified, and make a second invocation
392# of make so .config is not included in this case either (for *config).
393
Roman Zippel3eb3c742007-01-10 14:45:28 +0100394no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700395 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100396 include/linux/version.h headers_% \
397 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399config-targets := 0
400mixed-targets := 0
401dot-config := 1
402
403ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
404 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
405 dot-config := 0
406 endif
407endif
408
409ifeq ($(KBUILD_EXTMOD),)
410 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
411 config-targets := 1
412 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
413 mixed-targets := 1
414 endif
415 endif
416endif
417
418ifeq ($(mixed-targets),1)
419# ===========================================================================
420# We're called with mixed targets (*config and build targets).
421# Handle them one by one.
422
423%:: FORCE
424 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
425
426else
427ifeq ($(config-targets),1)
428# ===========================================================================
429# *config targets only - make sure prerequisites are updated, and descend
430# in scripts/kconfig to make the *config target
431
432# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
433# KBUILD_DEFCONFIG may point out an alternative default configuration
434# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200435include $(srctree)/arch/$(SRCARCH)/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436export KBUILD_DEFCONFIG
437
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200438config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700439 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 $(Q)$(MAKE) $(build)=scripts/kconfig $@
441
442else
443# ===========================================================================
444# Build targets only - this includes vmlinux, arch specific targets, clean
445# targets and others. In general all targets except *config targets.
446
447ifeq ($(KBUILD_EXTMOD),)
448# Additional helpers built in scripts/
449# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200450# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500451PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700452scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 $(Q)$(MAKE) $(build)=$(@)
454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455# Objects we will link into vmlinux / subdirs we need to visit
456init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100457drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458net-y := net/
459libs-y := lib/
460core-y := usr/
461endif # KBUILD_EXTMOD
462
463ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200464# Read in config
465-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200467ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468# Read in dependencies to all Kconfig* files, make sure to run
469# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700470-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700473$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Roman Zippelc955cca2006-06-08 22:12:39 -0700475# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100476# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200477# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100478# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700479include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
481else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200482# external modules needs include/linux/autoconf.h and include/config/auto.conf
483# but do not care if they are up-to-date. Use auto.conf to trigger the test
484PHONY += include/config/auto.conf
485
486include/config/auto.conf:
487 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
488 echo; \
489 echo " ERROR: Kernel configuration is invalid."; \
490 echo " include/linux/autoconf.h or $@ are missing."; \
491 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
492 echo; \
493 /bin/false)
494
495endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700496
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497else
498# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700499include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200500endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502# The all: target is the default when no target is given on the
503# command line.
504# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200505# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506all: vmlinux
507
508ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200509KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200511KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512endif
513
Ralf Baechlebef5b542008-07-16 13:02:24 +0100514include $(srctree)/arch/$(SRCARCH)/Makefile
515
Andi Kleen35bb5b12008-02-22 15:15:03 +0100516ifneq (CONFIG_FRAME_WARN,0)
517KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
518endif
519
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100520# Force gcc to behave correct even for buggy distributions
521# Arch Makefiles may override this setting
522KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
523
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200525KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200527KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528endif
529
530ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200531KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200532KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533endif
534
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200535ifdef CONFIG_FTRACE
536KBUILD_CFLAGS += -pg
537endif
538
Sam Ravnborg91341d42008-01-21 21:31:44 +0100539# We trigger additional mismatches with less inlining
540ifdef CONFIG_DEBUG_SECTION_MISMATCH
541KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
542endif
543
Sam Ravnborge8e69932005-04-30 16:51:42 -0700544# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700545NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700546CHECKFLAGS += $(NOSTDINC_FLAGS)
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200549KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200551# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200552KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Sam Ravnborg06c50402007-10-15 22:17:25 +0200554# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100555# But warn user when we do so
556warn-assign = \
557$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
558
559ifneq ($(KCPPFLAGS),)
560 $(call warn-assign,CPPFLAGS)
561 KBUILD_CPPFLAGS += $(KCPPFLAGS)
562endif
563ifneq ($(KAFLAGS),)
564 $(call warn-assign,AFLAGS)
565 KBUILD_AFLAGS += $(KAFLAGS)
566endif
567ifneq ($(KCFLAGS),)
568 $(call warn-assign,CFLAGS)
569 KBUILD_CFLAGS += $(KCFLAGS)
570endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200571
Roland McGrath18991192007-07-19 01:48:40 -0700572# Use --build-id when available.
573LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
574 $(call ld-option, -Wl$(comma)--build-id,))
575LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
576LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200579# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580# set in the environment
581# Also any assignments in arch/$(ARCH)/Makefile take precedence over
582# this default value
583export KBUILD_IMAGE ?= vmlinux
584
585#
586# INSTALL_PATH specifies where to place the updated kernel and system map
587# images. Default is /boot, but you can set it to other values
588export INSTALL_PATH ?= /boot
589
590#
591# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
592# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200593# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594#
595
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100596MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597export MODLIB
598
Theodore Ts'oac031f22006-06-21 20:53:09 -0400599#
600# INSTALL_MOD_STRIP, if defined, will cause modules to be
601# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
602# the default option --strip-debug will be used. Otherwise,
603# INSTALL_MOD_STRIP will used as the options to the strip command.
604
605ifdef INSTALL_MOD_STRIP
606ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200607mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400608else
609mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
610endif # INSTALL_MOD_STRIP=1
611else
612mod_strip_cmd = true
613endif # INSTALL_MOD_STRIP
614export mod_strip_cmd
615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100618core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
621 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
622 $(net-y) $(net-m) $(libs-y) $(libs-m)))
623
624vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
625 $(init-n) $(init-) \
626 $(core-n) $(core-) $(drivers-n) $(drivers-) \
627 $(net-n) $(net-) $(libs-n) $(libs-))))
628
629init-y := $(patsubst %/, %/built-in.o, $(init-y))
630core-y := $(patsubst %/, %/built-in.o, $(core-y))
631drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
632net-y := $(patsubst %/, %/built-in.o, $(net-y))
633libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
634libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
635libs-y := $(libs-y1) $(libs-y2)
636
637# Build vmlinux
638# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200639# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200641# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642# Ordering when linking is important, and $(vmlinux-init) must be first.
643#
644# vmlinux
645# ^
646# |
647# +-< $(vmlinux-init)
648# | +--< init/version.o + more
649# |
650# +--< $(vmlinux-main)
651# | +--< driver/built-in.o mm/built-in.o + more
652# |
653# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
654#
655# vmlinux version (uname -v) cannot be updated during normal
656# descending-into-subdirs phase since we do not yet know if we need to
657# update vmlinux.
658# Therefore this step is delayed until just before final link of vmlinux -
659# except in the kallsyms case where it is done just before adding the
660# symbols to the kernel.
661#
662# System.map is generated to document addresses of all kernel symbols
663
664vmlinux-init := $(head-y) $(init-y)
665vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
666vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200667vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100668export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
670# Rule to link vmlinux - also used during CONFIG_KALLSYMS
671# May be overridden by arch/$(ARCH)/Makefile
672quiet_cmd_vmlinux__ ?= LD $@
673 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
674 -T $(vmlinux-lds) $(vmlinux-init) \
675 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200676 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678# Generate new vmlinux version
679quiet_cmd_vmlinux_version = GEN .version
680 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200681 if [ ! -r .version ]; then \
682 rm -f .version; \
683 echo 1 >.version; \
684 else \
685 mv .version .old_version; \
686 expr 0$$(cat .old_version) + 1 >.version; \
687 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 $(MAKE) $(build)=init
689
690# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200691quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
693
694# Link of vmlinux
695# If CONFIG_KALLSYMS is set .version is already updated
696# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700697# Use + in front of the vmlinux_version rule to silent warning with make -j2
698# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700700 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
702
703 $(call cmd,vmlinux__)
704 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
705
Sam Ravnborg46352812006-08-08 21:41:18 +0200706 $(Q)$(if $($(quiet)cmd_sysmap), \
707 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
708 $(cmd_sysmap) $@ System.map; \
709 if [ $$? -ne 0 ]; then \
710 rm -f $@; \
711 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 fi;
713 $(verify_kallsyms)
714endef
715
716
717ifdef CONFIG_KALLSYMS
718# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
719# It's a three stage process:
720# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
721# empty
722# Running kallsyms on that gives us .tmp_kallsyms1.o with
723# the right size - vmlinux version (uname -v) is updated during this step
724# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
725# but due to the added section, some addresses have shifted.
726# From here, we generate a correct .tmp_kallsyms2.o
727# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
728# o Verify that the System.map from vmlinux matches the map from
729# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
730# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
731# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
732# temporary bypass to allow the kernel to be built while the
733# maintainers work out what went wrong with kallsyms.
734
735ifdef CONFIG_KALLSYMS_EXTRA_PASS
736last_kallsyms := 3
737else
738last_kallsyms := 2
739endif
740
741kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
742
743define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200744 $(Q)$(if $($(quiet)cmd_sysmap), \
745 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200747 $(Q)cmp -s System.map .tmp_System.map || \
748 (echo Inconsistent kallsyms data; \
749 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 rm .tmp_kallsyms* ; /bin/false )
751endef
752
753# Update vmlinux version before link
754# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200755# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756cmd_ksym_ld = $(cmd_vmlinux__)
757define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200758 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 +$(call cmd,vmlinux_version)
760 $(call cmd,vmlinux__)
761 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
762endef
763
764# Generate .S file with all kernel symbols
765quiet_cmd_kallsyms = KSYM $@
766 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
767 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
768
769.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
770 $(call if_changed_dep,as_o_S)
771
772.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
773 $(call cmd,kallsyms)
774
775# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
776.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
777 $(call if_changed_rule,ksym_ld)
778
779.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
780 $(call if_changed,vmlinux__)
781
782.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
783 $(call if_changed,vmlinux__)
784
785# Needs to visit scripts/ before $(KALLSYMS) can be used.
786$(KALLSYMS): scripts ;
787
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000788# Generate some data for debugging strange kallsyms problems
789debug_kallsyms: .tmp_map$(last_kallsyms)
790
791.tmp_map%: .tmp_vmlinux% FORCE
792 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
793
794.tmp_map3: .tmp_map2
795
796.tmp_map2: .tmp_map1
797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798endif # ifdef CONFIG_KALLSYMS
799
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200800# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
801# relevant sections renamed as per the linker script.
802quiet_cmd_vmlinux-modpost = LD $@
803 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
804 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200805 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200806define rule_vmlinux-modpost
807 :
808 +$(call cmd,vmlinux-modpost)
809 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
810 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
811endef
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100814vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700815ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100816 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700817endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700818ifdef CONFIG_SAMPLES
819 $(Q)$(MAKE) $(build)=samples
820endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200821 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200823 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Sam Ravnborg310f8242008-01-21 22:57:09 +0100825# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100826ifdef CONFIG_KALLSYMS
827.tmp_vmlinux1: vmlinux.o
828endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200829
830modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
831vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200832 $(call if_changed_rule,vmlinux-modpost)
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834# The actual objects are generated when descending,
835# make sure no implicit rule kicks in
836$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
837
838# Handle descending into subdirectories listed in $(vmlinux-dirs)
839# Preset locale variables to speed up the build process. Limit locale
840# tweaks to this spot to avoid wrong language settings when running
841# make menuconfig etc.
842# Error messages still appears in the original language
843
Paul Smith4f193362006-03-05 17:14:10 -0500844PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200845$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 $(Q)$(MAKE) $(build)=$@
847
Sam Ravnborgcb584552006-01-09 21:20:34 +0100848# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100849#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400850# The KERNELRELEASE value built here is stored in the file
851# include/config/kernel.release, and is used when executing several
852# make targets, such as "make install" or "make modules_install."
853#
854# The eventual kernel release string consists of the following fields,
855# shown in a hierarchical format to show how smaller parts are concatenated
856# to form the larger and final value, with values coming from places like
857# the Makefile, kernel config options, make command line options and/or
858# SCM tag information.
859#
860# $(KERNELVERSION)
861# $(VERSION) eg, 2
862# $(PATCHLEVEL) eg, 6
863# $(SUBLEVEL) eg, 18
864# $(EXTRAVERSION) eg, -rc6
865# $(localver-full)
866# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100867# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400868# $(CONFIG_LOCALVERSION) (from kernel config setting)
869# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
870# ./scripts/setlocalversion (SCM tag, if one exists)
871# $(LOCALVERSION) (from make command line if provided)
872#
873# Note how the final $(localver-auto) string is included *only* if the
874# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
875# moment, only git is supported but other SCMs can edit the script
876# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100877
Oleg Verych76c32952007-02-06 02:18:22 +0100878pattern = ".*/localversion[^~]*"
879string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800880 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100881
Oleg Verych76c32952007-02-06 02:18:22 +0100882localver = $(subst $(space),, $(string) \
883 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200884
Sam Ravnborgcb584552006-01-09 21:20:34 +0100885# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
886# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200887# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100888#
889# Currently, only git is supported.
890# Other SCMs can edit scripts/setlocalversion and add the appropriate
891# checks as needed.
892ifdef CONFIG_LOCALVERSION_AUTO
893 _localver-auto = $(shell $(CONFIG_SHELL) \
894 $(srctree)/scripts/setlocalversion $(srctree))
895 localver-auto = $(LOCALVERSION)$(_localver-auto)
896endif
897
898localver-full = $(localver)$(localver-auto)
899
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700900# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100901kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700902include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100903 $(Q)rm -f $@
904 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100905
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200908# or the modules are listed in "prepare".
909# A multi level approach is used. prepareN is processed before prepareN-1.
910# archprepare is used in arch Makefiles and when processed asm symlink,
911# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200913# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500914PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200915
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200916# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917# and if so do:
918# 1) Check that make has not been executed in the kernel src $(srctree)
919# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700920prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921ifneq ($(KBUILD_SRC),)
922 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700923 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 echo " $(srctree) is not clean, please run 'make mrproper'";\
925 echo " in the '$(srctree)' directory.";\
926 /bin/false; \
927 fi;
928 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200929 $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then \
930 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
931 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932endif
933
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200934# prepare2 creates a makefile if using a separate output directory
935prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Roman Zippel3eb3c742007-01-10 14:45:28 +0100937prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
938 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200939 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200941archprepare: prepare1 scripts_basic
942
943prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200944 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200945 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800948prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200950# Leave this as default for preprocessing vmlinux.lds.S, which is now
951# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
953export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
954
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200955# The asm symlink changes when $(ARCH) changes.
956# Detect this and ask user to run make mrproper
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200957define check-symlink
958 set -e; \
959 if [ -L include/asm ]; then \
960 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
961 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200962 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
963 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200964 exit 1; \
965 fi; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200966 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200967endef
968
969# We create the target directory of the symlink if it does
970# not exist so the test in chack-symlink works and we have a
971# directory for generated filesas used by some architectures.
972define create-symlink
973 if [ ! -L include/asm ]; then \
974 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
975 if [ ! -d include/asm-$(SRCARCH) ]; then \
976 mkdir -p include/asm-$(SRCARCH); \
977 fi; \
978 ln -fsn asm-$(SRCARCH) $@; \
979 fi
980endef
981
982include/asm: FORCE
983 $(Q)$(check-symlink)
984 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986# Generate some files
987# ---------------------------------------------------------------------------
988
989# KERNELRELEASE can change from a few different places, meaning version.h
990# needs to be updated, so this check is forced on all builds
991
992uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200993define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200995 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
996 exit 1; \
997 fi; \
998 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999endef
1000
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001001define filechk_version.h
1002 (echo \#define LINUX_VERSION_CODE $(shell \
1003 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1004 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1005endef
1006
1007include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 $(call filechk,version.h)
1009
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001010include/linux/utsrelease.h: include/config/kernel.release FORCE
1011 $(call filechk,utsrelease.h)
1012
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013# ---------------------------------------------------------------------------
1014
Paul Smith4f193362006-03-05 17:14:10 -05001015PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016depend dep:
1017 @echo '*** Warning: make $@ is unnecessary now.'
1018
1019# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001020# Firmware install
1021INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1022export INSTALL_FW_PATH
1023
1024PHONY += firmware_install
1025firmware_install: FORCE
1026 @mkdir -p $(objtree)/firmware
1027 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1028
1029# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001030# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001031
Sam Ravnborge6883b12008-06-05 16:43:46 +02001032#Default location for installed headers
1033export INSTALL_HDR_PATH = $(objtree)/usr
1034
Sam Ravnborge6883b12008-06-05 16:43:46 +02001035hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001036# Find out where the Kbuild file is located to support
1037# arch/$(ARCH)/include/asm
1038hdr-dir = $(strip \
1039 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1040 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1041
1042# If we do an all arch process set dst to asm-$(hdr-arch)
1043hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001044
1045PHONY += __headers
1046__headers: include/linux/version.h scripts_basic FORCE
1047 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001048
1049PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001050headers_install_all:
1051 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001052
David Woodhouse8d730cf2006-06-18 11:58:39 +01001053PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001054headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001055 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1056 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001057 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001058 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001059
Mike Frysinger1f857122007-02-14 00:33:02 -08001060PHONY += headers_check_all
1061headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001062 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001063
David Woodhouse68475352006-06-18 12:02:10 +01001064PHONY += headers_check
1065headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001066 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001067 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001068
David Woodhouse8d730cf2006-06-18 11:58:39 +01001069# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070# Modules
1071
1072ifdef CONFIG_MODULES
1073
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001074# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
1076all: modules
1077
1078# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001079#
1080# A module can be listed more than once in obj-m resulting in
1081# duplicate lines in modules.order files. Those are removed
1082# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Paul Smith4f193362006-03-05 17:14:10 -05001084PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001086 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001088 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
1090
1091# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001092PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001093modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
1095# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001096PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097modules_install: _modinst_ _modinst_post
1098
Paul Smith4f193362006-03-05 17:14:10 -05001099PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001101 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 echo "Warning: you may need to install module-init-tools"; \
1103 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1104 sleep 1; \
1105 fi
1106 @rm -rf $(MODLIB)/kernel
1107 @rm -f $(MODLIB)/source
1108 @mkdir -p $(MODLIB)/kernel
1109 @ln -s $(srctree) $(MODLIB)/source
1110 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1111 rm -f $(MODLIB)/build ; \
1112 ln -s $(objtree) $(MODLIB)/build ; \
1113 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001114 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001115 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001117# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118# boot a modules.dep even before / is mounted read-write. However the
1119# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001120PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001122 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001123 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
1125else # CONFIG_MODULES
1126
1127# Modules not configured
1128# ---------------------------------------------------------------------------
1129
1130modules modules_install: FORCE
1131 @echo
1132 @echo "The present kernel configuration has modules disabled."
1133 @echo "Type 'make config' and enable loadable module support."
1134 @echo "Then build a kernel with module support enabled."
1135 @echo
1136 @exit 1
1137
1138endif # CONFIG_MODULES
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140###
1141# Cleaning is done on three levels.
1142# make clean Delete most generated files
1143# Leave enough to build external modules
1144# make mrproper Delete the current configuration, and all generated files
1145# make distclean Remove editor backup files, patch leftover files and the like
1146
1147# Directories & files removed with 'make clean'
1148CLEAN_DIRS += $(MODVERDIR)
1149CLEAN_FILES += vmlinux System.map \
1150 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1151
1152# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001153MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001154MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001155 include/linux/autoconf.h include/linux/version.h \
1156 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001157 include/linux/bounds.h include/asm*/asm-offsets.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001158 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
1160# clean - Delete most, but leave enough to build external modules
1161#
1162clean: rm-dirs := $(CLEAN_DIRS)
1163clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001164clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
Paul Smith4f193362006-03-05 17:14:10 -05001166PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167$(clean-dirs):
1168 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1169
1170clean: archclean $(clean-dirs)
1171 $(call cmd,rmdirs)
1172 $(call cmd,rmfiles)
1173 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001174 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001175 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001176 -o -name '*.symtypes' -o -name 'modules.order' \
Alexey Dobriyan6b36ab22008-06-07 01:47:09 +04001177 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 -type f -print | xargs rm -f
1179
1180# mrproper - Delete all generated files, including .config
1181#
1182mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1183mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1184mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1185
Paul Smith4f193362006-03-05 17:14:10 -05001186PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187$(mrproper-dirs):
1188 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1189
1190mrproper: clean archmrproper $(mrproper-dirs)
1191 $(call cmd,rmdirs)
1192 $(call cmd,rmfiles)
1193
1194# distclean
1195#
Paul Smith4f193362006-03-05 17:14:10 -05001196PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
1198distclean: mrproper
1199 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001200 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001202 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1204 -type f -print | xargs rm -f
1205
1206
1207# Packaging of the kernel to various formats
1208# ---------------------------------------------------------------------------
1209# rpm target kept for backward compatibility
1210package-dir := $(srctree)/scripts/package
1211
Zach Brown031ecc62006-06-08 22:12:37 -07001212%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001213 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001214rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001215 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
1217
1218# Brief documentation of the typical targets used
1219# ---------------------------------------------------------------------------
1220
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001221boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001223board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1224board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226help:
1227 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001228 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001229 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001230 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001231 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 @echo ''
1233 @echo 'Configuration targets:'
1234 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1235 @echo ''
1236 @echo 'Other generic targets:'
1237 @echo ' all - Build all targets marked with [*]'
1238 @echo '* vmlinux - Build the bare kernel'
1239 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001240 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001241 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1242 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 @echo ' dir/ - Build all files in dir and below'
1244 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001245 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001246 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 @echo ' tags/TAGS - Generate tags file for editors'
1248 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001249 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001250 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001251 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001252 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001253 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 @echo ' checkstack - Generate a list of stack hogs'
1256 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001257 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001258 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001259 @echo ' export_report - List the usages of all exported symbols'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001260 @echo ' headers_check - Sanity check on exported headers'; \
1261 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001263 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 @echo ''
1265 @echo 'Documentation targets:'
1266 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1267 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001268 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001270 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 @echo ''
1272 @$(if $(boards), \
1273 $(foreach b, $(boards), \
1274 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1275 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001276 @$(if $(board-dirs), \
1277 $(foreach b, $(board-dirs), \
1278 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1279 printf " %-16s - Show all of the above\\n" help-boards; \
1280 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
1282 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001283 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001285 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1286 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 @echo ''
1288 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1289 @echo 'For further info see the ./README file'
1290
1291
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001292help-board-dirs := $(addprefix help-,$(board-dirs))
1293
1294help-boards: $(help-board-dirs)
1295
1296boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1297
1298$(help-board-dirs): help-%:
1299 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1300 @$(if $(boards-per-dir), \
1301 $(foreach b, $(boards-per-dir), \
1302 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1303 echo '')
1304
1305
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306# Documentation targets
1307# ---------------------------------------------------------------------------
1308%docs: scripts_basic FORCE
1309 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1310
1311else # KBUILD_EXTMOD
1312
1313###
1314# External module support.
1315# When building external modules the kernel used as basis is considered
1316# read-only, and no consistency checks are made and the make
1317# system is not used on the basis kernel. If updates are required
1318# in the basis kernel ordinary make commands (without M=...) must
1319# be used.
1320#
1321# The following are the only valid targets when building external
1322# modules.
1323# make M=dir clean Delete all automatically generated files
1324# make M=dir modules Make all modules in specified dir
1325# make M=dir Same as 'make M=dir modules'
1326# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001327# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328# Assumes install directory is already created
1329
1330# We are always building modules
1331KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001332PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001334 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
Paul Smith4f193362006-03-05 17:14:10 -05001336PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337$(objtree)/Module.symvers:
1338 @test -e $(objtree)/Module.symvers || ( \
1339 echo; \
1340 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1341 echo " is missing; modules will have no dependencies and modversions."; \
1342 echo )
1343
1344module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001345PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346$(module-dirs): crmodverdir $(objtree)/Module.symvers
1347 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1348
1349modules: $(module-dirs)
1350 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001351 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
Paul Smith4f193362006-03-05 17:14:10 -05001353PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001354modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001355
Paul Smith4f193362006-03-05 17:14:10 -05001356install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1357PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001358_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001359 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001360 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Paul Smith4f193362006-03-05 17:14:10 -05001362PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001363_emodinst_post: _emodinst_
1364 $(call cmd,depmod)
1365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1367
Paul Smith4f193362006-03-05 17:14:10 -05001368PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369$(clean-dirs):
1370 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1371
1372clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001373clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374clean: $(clean-dirs)
1375 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001376 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001378 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1380 -type f -print | xargs rm -f
1381
1382help:
1383 @echo ' Building external modules.'
1384 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1385 @echo ''
1386 @echo ' modules - default target, build the module(s)'
1387 @echo ' modules_install - install the module'
1388 @echo ' clean - remove generated files in module directory only'
1389 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001390
1391# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001392PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001393prepare: ;
1394scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395endif # KBUILD_EXTMOD
1396
1397# Generate tags for editors
1398# ---------------------------------------------------------------------------
1399
1400#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1401#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1402#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1403
George Anzingerf182ae62005-07-07 17:56:06 -07001404ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405__srctree =
1406else
1407__srctree = $(srctree)/
1408endif
1409
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001410ifeq ($(ALLSOURCE_ARCHS),)
1411ifeq ($(ARCH),um)
1412ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1413else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001414ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001415endif
1416else
Linus Nilssond384e352008-01-20 17:10:01 +01001417#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001418ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1419endif
1420
Thomas Gleixnerd0974b12007-11-15 07:11:12 +01001421ALLSOURCE_ARCHS := $(SRCARCH)
Ian Campbella0674e82005-06-23 11:25:54 +01001422
Masatake YAMATOe838db62006-06-22 12:21:20 +09001423define find-sources
Yinghai Luf8bea582007-10-16 00:28:06 -07001424 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1425 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001426 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001427 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001429 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 find $(__srctree)include $(RCS_FIND_IGNORE) \
1431 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001432 -o -name $1 -print; \
Yinghai Luf8bea582007-10-16 00:28:06 -07001433 for arch in $(ALLINCLUDE_ARCHS) ; do \
Sam Ravnborga53ce092008-06-22 21:41:13 +02001434 test -e $(__srctree)include/asm-$${arch} && \
1435 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1436 -name $1 -print; \
1437 test -e $(__srctree)arch/$${arch}/include/asm && \
1438 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001439 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001440 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001442 -name $1 -print; \
1443 find $(__srctree) $(RCS_FIND_IGNORE) \
Yinghai Lu37ab7a22007-10-17 16:43:39 -07001444 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001445 -name $1 -print; \
1446 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001447endef
1448
1449define all-sources
1450 $(call find-sources,'*.[chS]')
1451endef
1452define all-kconfigs
1453 $(call find-sources,'Kconfig*')
1454endef
1455define all-defconfigs
1456 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457endef
1458
Aron Griffisda7c0402006-09-21 00:27:02 -04001459define xtags
1460 if $1 --version 2>&1 | grep -iq exuberant; then \
1461 $(all-sources) | xargs $1 -a \
1462 -I __initdata,__exitdata,__acquires,__releases \
Uwe Kleine-König2c812102008-01-08 15:16:24 +01001463 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
Aron Griffisda7c0402006-09-21 00:27:02 -04001464 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001465 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001466 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001467 $(all-kconfigs) | xargs $1 -a \
1468 --langdef=kconfig \
1469 --language-force=kconfig \
Alexey Dobriyan80ff2622008-02-22 15:02:33 +03001470 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
David Gibson18e39912006-10-04 02:15:32 -07001471 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001472 --langdef=dotconfig \
1473 --language-force=dotconfig \
1474 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1475 elif $1 --version 2>&1 | grep -iq emacs; then \
1476 $(all-sources) | xargs $1 -a; \
1477 $(all-kconfigs) | xargs $1 -a \
Masatake YAMATOa95bcfa2008-05-07 16:04:31 +09001478 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
David Gibson18e39912006-10-04 02:15:32 -07001479 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001480 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1481 else \
1482 $(all-sources) | xargs $1 -a; \
1483 fi
1484endef
1485
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001487 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
1489quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001490 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491
1492cscope: FORCE
1493 $(call cmd,cscope-file)
1494 $(call cmd,cscope)
1495
1496quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001497define cmd_TAGS
1498 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001499 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001500endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001502TAGS: FORCE
1503 $(call cmd,TAGS)
1504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505quiet_cmd_tags = MAKE $@
1506define cmd_tags
1507 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001508 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509endef
1510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511tags: FORCE
1512 $(call cmd,tags)
1513
1514
1515# Scripts to check various things for consistency
1516# ---------------------------------------------------------------------------
1517
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518includecheck:
1519 find * $(RCS_FIND_IGNORE) \
1520 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001521 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522
1523versioncheck:
1524 find * $(RCS_FIND_IGNORE) \
1525 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001526 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528namespacecheck:
1529 $(PERL) $(srctree)/scripts/namespace.pl
1530
Adrian Bunk295ac052007-08-24 23:04:56 +02001531export_report:
1532 $(PERL) $(srctree)/scripts/export_report.pl
1533
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534endif #ifeq ($(config-targets),1)
1535endif #ifeq ($(mixed-targets),1)
1536
Roman Zippelc30a02e2006-06-08 22:12:50 -07001537PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001538
Jeff Dike011e3a92006-12-13 00:34:12 -08001539# UML needs a little special treatment here. It wants to use the host
1540# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1541# else wants $(ARCH), including people doing cross-builds, which means
1542# that $(SUBARCH) doesn't work here.
1543ifeq ($(ARCH), um)
1544CHECKSTACK_ARCH := $(SUBARCH)
1545else
1546CHECKSTACK_ARCH := $(ARCH)
1547endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548checkstack:
1549 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001550 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551
1552kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001553 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1554 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001555kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001556 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557
Sam Ravnborg06300b22006-01-25 07:13:18 +01001558# Single targets
1559# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001560# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001561# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001562# - build with separate output dir 'make O=...'
1563# - external modules
1564#
1565# target-dir => where to store outputfile
1566# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001567
Sam Ravnborg06300b22006-01-25 07:13:18 +01001568ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001569 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001570 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001571else
1572 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001573 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1574 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001575endif
1576
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001577%.s: %.c prepare scripts FORCE
1578 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1579%.i: %.c prepare scripts FORCE
1580 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1581%.o: %.c prepare scripts FORCE
1582 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1583%.lst: %.c prepare scripts FORCE
1584 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1585%.s: %.S prepare scripts FORCE
1586 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1587%.o: %.S prepare scripts FORCE
1588 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001589%.symtypes: %.c prepare scripts FORCE
1590 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001591
1592# Modules
1593/ %/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001594 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001595 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001596 $(build)=$(build-dir)
1597%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001598 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001599 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001600 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001601 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001602
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603# FIXME Should go into a make.lib or something
1604# ===========================================================================
1605
1606quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1607 cmd_rmdirs = rm -rf $(rm-dirs)
1608
1609quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1610 cmd_rmfiles = rm -f $(rm-files)
1611
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001612# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001613quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1614 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001615 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001616 $(DEPMOD) -ae -F System.map \
1617 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1618 $(KERNELRELEASE); \
1619 fi
1620
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001621# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001622# clean it up only when building all modules
1623cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1624 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
Sam Ravnborg222d3942007-10-15 21:59:31 +02001626a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg06c50402007-10-15 22:17:25 +02001627 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001628 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
1630quiet_cmd_as_o_S = AS $@
1631cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1632
1633# read all saved command lines
1634
1635targets := $(wildcard $(sort $(targets)))
1636cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1637
1638ifneq ($(cmd_files),)
1639 $(cmd_files): ; # Do not try to update included dependency files
1640 include $(cmd_files)
1641endif
1642
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1644# Usage:
1645# $(Q)$(MAKE) $(clean)=dir
1646clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1647
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648endif # skip-makefile
1649
Paul Smith4f193362006-03-05 17:14:10 -05001650PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001652
Paul Smith4f193362006-03-05 17:14:10 -05001653# Declare the contents of the .PHONY variable as phony. We keep that
1654# information in a variable se we can use it in if_changed and friends.
1655.PHONY: $(PHONY)