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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds17d857b2009-09-27 14:57:48 -07003SUBLEVEL = 32
Linus Torvalds22763c52009-12-02 19:51:21 -08004EXTRAVERSION =
Linus Torvalds59a37592009-05-23 14:47:00 -07005NAME = Man-Eating Seals of Antiquity
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
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
20LC_ALL=
21LC_CTYPE=C
22LC_COLLATE=C
23LC_NUMERIC=C
24export LC_ALL LC_CTYPE LC_COLLATE LC_NUMERIC
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026# We are using a recursive build, so we need to do a little thinking
27# to get the ordering right.
28#
29# Most importantly: sub-Makefiles should only ever modify files in
30# their own directory. If in some directory we have a dependency on
31# a file in another dir (which doesn't happen often, but it's often
32# unavoidable when linking the built-in.o targets which finally
33# turn into vmlinux), we will call a sub make in that other dir, and
34# after that we are sure that everything which is in that other dir
35# is now up to date.
36#
37# The only cases where we need to modify files which have global
38# effects are thus separated out and done before the recursive
39# descending is started. They are now explicitly listed as the
40# prepare rule.
41
42# To put more focus on warnings, be less verbose as default
43# Use 'make V=1' to see the full commands
44
Cheng Renquanb8b06182009-05-26 16:03:07 +080045ifeq ("$(origin V)", "command line")
46 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047endif
48ifndef KBUILD_VERBOSE
49 KBUILD_VERBOSE = 0
50endif
51
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040052# Call a source code checker (by default, "sparse") as part of the
53# C compilation.
54#
55# Use 'make C=1' to enable checking of only re-compiled files.
56# Use 'make C=2' to enable checking of *all* source files, regardless
57# of whether they are re-compiled or not.
58#
59# See the file "Documentation/sparse.txt" for more details, including
60# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Cheng Renquanb8b06182009-05-26 16:03:07 +080062ifeq ("$(origin C)", "command line")
63 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064endif
65ifndef KBUILD_CHECKSRC
66 KBUILD_CHECKSRC = 0
67endif
68
69# Use make M=dir to specify directory of external module to build
70# Old syntax make ... SUBDIRS=$PWD is still supported
71# Setting the environment variable KBUILD_EXTMOD take precedence
72ifdef SUBDIRS
73 KBUILD_EXTMOD ?= $(SUBDIRS)
74endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Cheng Renquanb8b06182009-05-26 16:03:07 +080076ifeq ("$(origin M)", "command line")
77 KBUILD_EXTMOD := $(M)
78endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80# kbuild supports saving output files in a separate directory.
81# To locate output files in a separate directory two syntaxes are supported.
82# In both cases the working directory must be the root of the kernel src.
83# 1) O=
84# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020085#
Linus Torvalds1da177e2005-04-16 15:20:36 -070086# 2) Set KBUILD_OUTPUT
87# Set the environment variable KBUILD_OUTPUT to point to the directory
88# where the output files shall be placed.
89# export KBUILD_OUTPUT=dir/to/store/output/files/
90# make
91#
92# The O= assignment takes precedence over the KBUILD_OUTPUT environment
93# variable.
94
95
96# KBUILD_SRC is set on invocation of make in OBJ directory
97# KBUILD_SRC is not intended to be used by the regular user (for now)
98ifeq ($(KBUILD_SRC),)
99
100# OK, Make called in directory where kernel src resides
101# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800102ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104endif
105
106# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500107PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108_all:
109
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100110# Cancel implicit rules on top Makefile
111$(CURDIR)/Makefile Makefile: ;
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113ifneq ($(KBUILD_OUTPUT),)
114# Invoke a second make in the output directory, passing relevant variables
115# check that the output directory actually exists
116saved-output := $(KBUILD_OUTPUT)
117KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
118$(if $(KBUILD_OUTPUT),, \
119 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Milton Miller0b357862007-09-21 18:09:02 -0500121PHONY += $(MAKECMDGOALS) sub-make
122
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100123$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500124 $(Q)@:
125
126sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200127 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
128 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500129 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
130 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132# Leave processing to above invocation of make
133skip-makefile := 1
134endif # ifneq ($(KBUILD_OUTPUT),)
135endif # ifeq ($(KBUILD_SRC),)
136
137# We process the rest of the Makefile if this is the final invocation of make
138ifeq ($(skip-makefile),)
139
140# If building an external module we do not care about the all: rule
141# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500142PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143ifeq ($(KBUILD_EXTMOD),)
144_all: all
145else
146_all: modules
147endif
148
149srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150objtree := $(CURDIR)
151src := $(srctree)
152obj := $(objtree)
153
Mattia Dongili0f558c32006-02-19 13:50:37 +0100154VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Amerigo Wang11294232009-06-19 03:40:26 -0400156export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159# SUBARCH tells the usermode build what the underlying arch is. That is set
160# first, and if a usermode build is happening, the "ARCH=um" on the command
161# line overrides the setting of ARCH below. If a native build is happening,
162# then ARCH is assigned, getting whatever value it gets normally, and
163# SUBARCH is subsequently ignored.
164
165SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
166 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800167 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900168 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900169 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171# Cross compiling and selecting different set of gcc/bin-utils
172# ---------------------------------------------------------------------------
173#
174# When performing cross compilation for other architectures ARCH shall be set
175# to the target architecture. (See arch/* for the possibilities).
176# ARCH can be set during invocation of make:
177# make ARCH=ia64
178# Another way is to have ARCH set in the environment.
179# The default ARCH is the host where make is executed.
180
181# CROSS_COMPILE specify the prefix used for all executables used
182# during compilation. Only gcc and related bin-utils executables
183# are prefixed with $(CROSS_COMPILE).
184# CROSS_COMPILE can be set on the command line
185# make CROSS_COMPILE=ia64-linux-
186# Alternatively CROSS_COMPILE can be set in the environment.
187# Default value for CROSS_COMPILE is not to prefix executables
188# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100189export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200190ARCH ?= $(SUBARCH)
191CROSS_COMPILE ?=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200194UTS_MACHINE := $(ARCH)
195SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
Sam Ravnborgd746d642007-11-12 20:14:19 +0100197# Additional ARCH settings for x86
198ifeq ($(ARCH),i386)
199 SRCARCH := x86
200endif
201ifeq ($(ARCH),x86_64)
202 SRCARCH := x86
203endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200204
Sam Ravnborg5e538792008-12-02 23:17:12 -0800205# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200206ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800207 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200208endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200209
Paul Mundt3cc000b2009-04-11 08:39:27 +0900210# Additional ARCH settings for sh
211ifeq ($(ARCH),sh64)
212 SRCARCH := sh
213endif
214
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215# Where to locate arch specific headers
216hdr-arch := $(SRCARCH)
217
Sam Ravnborg49148022009-01-16 21:58:10 +1000218ifeq ($(ARCH),m68knommu)
219 hdr-arch := m68k
220endif
221
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700222KCONFIG_CONFIG ?= .config
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224# SHELL used by kbuild
225CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
226 else if [ -x /bin/bash ]; then echo /bin/bash; \
227 else echo sh; fi ; fi)
228
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200229HOSTCC = gcc
230HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800231HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200232HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200234# Decide whether to build built-in, modular, or both.
235# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237KBUILD_MODULES :=
238KBUILD_BUILTIN := 1
239
240# If we have only "make modules", don't compile built-in objects.
241# When we're building modules with modversions, we need to consider
242# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200243# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245ifeq ($(MAKECMDGOALS),modules)
246 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
247endif
248
249# If we have "make <whatever> modules", compile modules
250# in addition to whatever we do anyway.
251# Just "make" or "make all" shall build modules as well
252
253ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
254 KBUILD_MODULES := 1
255endif
256
257ifeq ($(MAKECMDGOALS),)
258 KBUILD_MODULES := 1
259endif
260
Sam Ravnborge579d352005-07-27 08:10:10 +0200261export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
263
264# Beautify output
265# ---------------------------------------------------------------------------
266#
267# Normally, we echo the whole command before executing it. By making
268# that echo $($(quiet)$(cmd)), we now have the possibility to set
269# $(quiet) to choose other forms of output instead, e.g.
270#
271# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
272# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
273#
274# If $(quiet) is empty, the whole command will be printed.
275# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200276# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277# the variable $(silent_cmd_cc_o_c) doesn't exist.
278#
Adrian Bunka58a4142006-01-10 00:08:17 +0100279# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280# for commands that shall be hidden in non-verbose mode.
281#
282# $(Q)ln $@ :<
283#
284# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
285# If KBUILD_VERBOSE equals 1 then the above command is displayed.
286
287ifeq ($(KBUILD_VERBOSE),1)
288 quiet =
289 Q =
290else
291 quiet=quiet_
292 Q = @
293endif
294
295# If the user is running make -s (silent mode), suppress echoing of
296# commands
297
298ifneq ($(findstring s,$(MAKEFLAGS)),)
299 quiet=silent_
300endif
301
302export quiet Q KBUILD_VERBOSE
303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305# Look for make include files relative to root of kernel src
306MAKEFLAGS += --include-dir=$(srctree)
307
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100308# We need some generic definitions (do not try to remake the file).
309$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800310include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312# Make variables (CC, etc...)
313
314AS = $(CROSS_COMPILE)as
315LD = $(CROSS_COMPILE)ld
316CC = $(CROSS_COMPILE)gcc
317CPP = $(CC) -E
318AR = $(CROSS_COMPILE)ar
319NM = $(CROSS_COMPILE)nm
320STRIP = $(CROSS_COMPILE)strip
321OBJCOPY = $(CROSS_COMPILE)objcopy
322OBJDUMP = $(CROSS_COMPILE)objdump
323AWK = awk
324GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200325INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326DEPMOD = /sbin/depmod
327KALLSYMS = scripts/kallsyms
328PERL = perl
329CHECK = sparse
330
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100331CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
332 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333MODFLAGS = -DMODULE
334CFLAGS_MODULE = $(MODFLAGS)
335AFLAGS_MODULE = $(MODFLAGS)
Tejun Heo405d9672009-06-24 15:13:38 +0900336LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337CFLAGS_KERNEL =
338AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700339CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341
342# Use LINUXINCLUDE when you must reference the include/ directory.
343# Needed to be compatible with the O= option
344LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100345 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200346 -I$(srctree)/arch/$(hdr-arch)/include \
347 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100349KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200351KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700352 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300353 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800354 -Wno-format-security \
355 -fno-delete-null-pointer-checks
Sam Ravnborg222d3942007-10-15 21:59:31 +0200356KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700358# Read KERNELRELEASE from include/config/kernel.release (if it exists)
359KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100360KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100361
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200362export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100363export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200364export CPP AR NM STRIP OBJCOPY OBJDUMP
365export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200366export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
Sam Ravnborg06c50402007-10-15 22:17:25 +0200368export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700369export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200370export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372# When compiling out-of-tree modules, put MODVERDIR in the module
373# tree rather than in the kernel tree. The kernel tree might
374# even be read-only.
375export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377# Files to ignore in find ... statements
378
Trond Myklebust406119f2005-10-27 14:46:53 -0400379RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
380export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382# ===========================================================================
383# Rules shared between *config targets and build targets
384
385# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500386PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387scripts_basic:
388 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500389 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200391# To avoid any implicit rule to kick in, define an empty command.
392scripts/basic/%: scripts_basic ;
393
Paul Smith4f193362006-03-05 17:14:10 -0500394PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200395# outputmakefile generates a Makefile in the output directory, if using a
396# separate output directory. This allows convenient use of make in the
397# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200399ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100400 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200401 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
402 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
403endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405# To make sure we do not include .config for any of the *config targets
406# catch them early, and hand them over to scripts/kconfig/Makefile
407# It is allowed to specify more targets when calling make, including
408# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200409# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410# Detect when mixed targets is specified, and make a second invocation
411# of make so .config is not included in this case either (for *config).
412
Roman Zippel3eb3c742007-01-10 14:45:28 +0100413no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700414 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100415 include/linux/version.h headers_% \
416 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418config-targets := 0
419mixed-targets := 0
420dot-config := 1
421
422ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
423 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
424 dot-config := 0
425 endif
426endif
427
428ifeq ($(KBUILD_EXTMOD),)
429 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
430 config-targets := 1
431 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
432 mixed-targets := 1
433 endif
434 endif
435endif
436
437ifeq ($(mixed-targets),1)
438# ===========================================================================
439# We're called with mixed targets (*config and build targets).
440# Handle them one by one.
441
442%:: FORCE
443 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
444
445else
446ifeq ($(config-targets),1)
447# ===========================================================================
448# *config targets only - make sure prerequisites are updated, and descend
449# in scripts/kconfig to make the *config target
450
451# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
452# KBUILD_DEFCONFIG may point out an alternative default configuration
453# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200454include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400455export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100457config: scripts_basic outputmakefile FORCE
458 $(Q)mkdir -p include/linux include/config
459 $(Q)$(MAKE) $(build)=scripts/kconfig $@
460
461%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700462 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 $(Q)$(MAKE) $(build)=scripts/kconfig $@
464
465else
466# ===========================================================================
467# Build targets only - this includes vmlinux, arch specific targets, clean
468# targets and others. In general all targets except *config targets.
469
470ifeq ($(KBUILD_EXTMOD),)
471# Additional helpers built in scripts/
472# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200473# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500474PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700475scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 $(Q)$(MAKE) $(build)=$(@)
477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478# Objects we will link into vmlinux / subdirs we need to visit
479init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100480drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481net-y := net/
482libs-y := lib/
483core-y := usr/
484endif # KBUILD_EXTMOD
485
486ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200487# Read in config
488-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200490ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491# Read in dependencies to all Kconfig* files, make sure to run
492# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700493-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700496$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Roman Zippelc955cca2006-06-08 22:12:39 -0700498# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100499# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200500# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100501# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700502include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
504else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200505# external modules needs include/linux/autoconf.h and include/config/auto.conf
506# but do not care if they are up-to-date. Use auto.conf to trigger the test
507PHONY += include/config/auto.conf
508
509include/config/auto.conf:
510 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
511 echo; \
512 echo " ERROR: Kernel configuration is invalid."; \
513 echo " include/linux/autoconf.h or $@ are missing."; \
514 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
515 echo; \
516 /bin/false)
517
518endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520else
521# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700522include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200523endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525# The all: target is the default when no target is given on the
526# command line.
527# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200528# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529all: vmlinux
530
531ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200532KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200534KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535endif
536
Ralf Baechlebef5b542008-07-16 13:02:24 +0100537include $(srctree)/arch/$(SRCARCH)/Makefile
538
Mike Frysinger08f67462009-06-04 16:29:08 -0700539ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100540KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
541endif
542
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100543# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900544ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100545KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900546endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200549KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200551KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552endif
553
554ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200555KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200556KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557endif
558
Steven Rostedt606576c2008-10-06 19:06:12 -0400559ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200560KBUILD_CFLAGS += -pg
561endif
562
Sam Ravnborg91341d42008-01-21 21:31:44 +0100563# We trigger additional mismatches with less inlining
564ifdef CONFIG_DEBUG_SECTION_MISMATCH
565KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
566endif
567
Sam Ravnborge8e69932005-04-30 16:51:42 -0700568# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700569NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700570CHECKFLAGS += $(NOSTDINC_FLAGS)
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200573KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200575# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200576KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400578# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700579KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700580
Kyle McMartin00308642009-03-23 15:25:49 -0400581# revert to pre-gcc-4.4 behaviour of .eh_frame
582KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
583
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700584# conserve stack if available
585KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
586
Sam Ravnborg06c50402007-10-15 22:17:25 +0200587# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100588# But warn user when we do so
589warn-assign = \
590$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
591
592ifneq ($(KCPPFLAGS),)
593 $(call warn-assign,CPPFLAGS)
594 KBUILD_CPPFLAGS += $(KCPPFLAGS)
595endif
596ifneq ($(KAFLAGS),)
597 $(call warn-assign,AFLAGS)
598 KBUILD_AFLAGS += $(KAFLAGS)
599endif
600ifneq ($(KCFLAGS),)
601 $(call warn-assign,CFLAGS)
602 KBUILD_CFLAGS += $(KCFLAGS)
603endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200604
Roland McGrath18991192007-07-19 01:48:40 -0700605# Use --build-id when available.
606LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200607 $(call cc-ldoption, -Wl$(comma)--build-id,))
Roland McGrath18991192007-07-19 01:48:40 -0700608LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
609LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
610
David Howells5d7d18f2009-03-04 11:59:07 -0800611ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200612LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800613endif
614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200616# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617# set in the environment
618# Also any assignments in arch/$(ARCH)/Makefile take precedence over
619# this default value
620export KBUILD_IMAGE ?= vmlinux
621
622#
623# INSTALL_PATH specifies where to place the updated kernel and system map
624# images. Default is /boot, but you can set it to other values
625export INSTALL_PATH ?= /boot
626
627#
628# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
629# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200630# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631#
632
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100633MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634export MODLIB
635
Theodore Ts'oac031f22006-06-21 20:53:09 -0400636#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100637# INSTALL_MOD_STRIP, if defined, will cause modules to be
638# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
639# the default option --strip-debug will be used. Otherwise,
640# INSTALL_MOD_STRIP will used as the options to the strip command.
641
Theodore Ts'oac031f22006-06-21 20:53:09 -0400642ifdef INSTALL_MOD_STRIP
643ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100644mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400645else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100646mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400647endif # INSTALL_MOD_STRIP=1
648else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100649mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400650endif # INSTALL_MOD_STRIP
651export mod_strip_cmd
652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
654ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100655core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
657vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
658 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
659 $(net-y) $(net-m) $(libs-y) $(libs-m)))
660
661vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
662 $(init-n) $(init-) \
663 $(core-n) $(core-) $(drivers-n) $(drivers-) \
664 $(net-n) $(net-) $(libs-n) $(libs-))))
665
666init-y := $(patsubst %/, %/built-in.o, $(init-y))
667core-y := $(patsubst %/, %/built-in.o, $(core-y))
668drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
669net-y := $(patsubst %/, %/built-in.o, $(net-y))
670libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
671libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
672libs-y := $(libs-y1) $(libs-y2)
673
674# Build vmlinux
675# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200676# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200678# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679# Ordering when linking is important, and $(vmlinux-init) must be first.
680#
681# vmlinux
682# ^
683# |
684# +-< $(vmlinux-init)
685# | +--< init/version.o + more
686# |
687# +--< $(vmlinux-main)
688# | +--< driver/built-in.o mm/built-in.o + more
689# |
690# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
691#
692# vmlinux version (uname -v) cannot be updated during normal
693# descending-into-subdirs phase since we do not yet know if we need to
694# update vmlinux.
695# Therefore this step is delayed until just before final link of vmlinux -
696# except in the kallsyms case where it is done just before adding the
697# symbols to the kernel.
698#
699# System.map is generated to document addresses of all kernel symbols
700
701vmlinux-init := $(head-y) $(init-y)
702vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
703vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200704vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100705export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707# Rule to link vmlinux - also used during CONFIG_KALLSYMS
708# May be overridden by arch/$(ARCH)/Makefile
709quiet_cmd_vmlinux__ ?= LD $@
710 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
711 -T $(vmlinux-lds) $(vmlinux-init) \
712 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200713 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
715# Generate new vmlinux version
716quiet_cmd_vmlinux_version = GEN .version
717 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200718 if [ ! -r .version ]; then \
719 rm -f .version; \
720 echo 1 >.version; \
721 else \
722 mv .version .old_version; \
723 expr 0$$(cat .old_version) + 1 >.version; \
724 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 $(MAKE) $(build)=init
726
727# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200728quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
730
731# Link of vmlinux
732# If CONFIG_KALLSYMS is set .version is already updated
733# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700734# Use + in front of the vmlinux_version rule to silent warning with make -j2
735# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700737 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
739
740 $(call cmd,vmlinux__)
741 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
742
Sam Ravnborg46352812006-08-08 21:41:18 +0200743 $(Q)$(if $($(quiet)cmd_sysmap), \
744 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
745 $(cmd_sysmap) $@ System.map; \
746 if [ $$? -ne 0 ]; then \
747 rm -f $@; \
748 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 fi;
750 $(verify_kallsyms)
751endef
752
753
754ifdef CONFIG_KALLSYMS
755# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
756# It's a three stage process:
757# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
758# empty
759# Running kallsyms on that gives us .tmp_kallsyms1.o with
760# the right size - vmlinux version (uname -v) is updated during this step
761# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
762# but due to the added section, some addresses have shifted.
763# From here, we generate a correct .tmp_kallsyms2.o
764# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
765# o Verify that the System.map from vmlinux matches the map from
766# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
767# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
768# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
769# temporary bypass to allow the kernel to be built while the
770# maintainers work out what went wrong with kallsyms.
771
772ifdef CONFIG_KALLSYMS_EXTRA_PASS
773last_kallsyms := 3
774else
775last_kallsyms := 2
776endif
777
778kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
779
780define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200781 $(Q)$(if $($(quiet)cmd_sysmap), \
782 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200784 $(Q)cmp -s System.map .tmp_System.map || \
785 (echo Inconsistent kallsyms data; \
786 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 rm .tmp_kallsyms* ; /bin/false )
788endef
789
790# Update vmlinux version before link
791# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200792# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793cmd_ksym_ld = $(cmd_vmlinux__)
794define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200795 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 +$(call cmd,vmlinux_version)
797 $(call cmd,vmlinux__)
798 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
799endef
800
801# Generate .S file with all kernel symbols
802quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100803 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
804 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100806.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 $(call if_changed_dep,as_o_S)
808
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100809.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 $(call cmd,kallsyms)
811
812# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100813.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
814 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100816.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
817 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100819.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
820 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822# Needs to visit scripts/ before $(KALLSYMS) can be used.
823$(KALLSYMS): scripts ;
824
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000825# Generate some data for debugging strange kallsyms problems
826debug_kallsyms: .tmp_map$(last_kallsyms)
827
828.tmp_map%: .tmp_vmlinux% FORCE
829 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
830
831.tmp_map3: .tmp_map2
832
833.tmp_map2: .tmp_map1
834
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835endif # ifdef CONFIG_KALLSYMS
836
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200837# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
838# relevant sections renamed as per the linker script.
839quiet_cmd_vmlinux-modpost = LD $@
840 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
841 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200842 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200843define rule_vmlinux-modpost
844 :
845 +$(call cmd,vmlinux-modpost)
846 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
847 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
848endef
849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100851vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700852ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100853 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700854endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700855ifdef CONFIG_SAMPLES
856 $(Q)$(MAKE) $(build)=samples
857endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700858ifdef CONFIG_BUILD_DOCSRC
859 $(Q)$(MAKE) $(build)=Documentation
860endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200861 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200863 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Sam Ravnborg310f8242008-01-21 22:57:09 +0100865# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100866ifdef CONFIG_KALLSYMS
867.tmp_vmlinux1: vmlinux.o
868endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200869
870modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
871vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200872 $(call if_changed_rule,vmlinux-modpost)
873
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874# The actual objects are generated when descending,
875# make sure no implicit rule kicks in
876$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
877
878# Handle descending into subdirectories listed in $(vmlinux-dirs)
879# Preset locale variables to speed up the build process. Limit locale
880# tweaks to this spot to avoid wrong language settings when running
881# make menuconfig etc.
882# Error messages still appears in the original language
883
Paul Smith4f193362006-03-05 17:14:10 -0500884PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200885$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 $(Q)$(MAKE) $(build)=$@
887
Sam Ravnborgcb584552006-01-09 21:20:34 +0100888# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100889#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400890# The KERNELRELEASE value built here is stored in the file
891# include/config/kernel.release, and is used when executing several
892# make targets, such as "make install" or "make modules_install."
893#
894# The eventual kernel release string consists of the following fields,
895# shown in a hierarchical format to show how smaller parts are concatenated
896# to form the larger and final value, with values coming from places like
897# the Makefile, kernel config options, make command line options and/or
898# SCM tag information.
899#
900# $(KERNELVERSION)
901# $(VERSION) eg, 2
902# $(PATCHLEVEL) eg, 6
903# $(SUBLEVEL) eg, 18
904# $(EXTRAVERSION) eg, -rc6
905# $(localver-full)
906# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100907# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400908# $(CONFIG_LOCALVERSION) (from kernel config setting)
909# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
910# ./scripts/setlocalversion (SCM tag, if one exists)
911# $(LOCALVERSION) (from make command line if provided)
912#
913# Note how the final $(localver-auto) string is included *only* if the
914# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
915# moment, only git is supported but other SCMs can edit the script
916# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100917
Oleg Verych76c32952007-02-06 02:18:22 +0100918pattern = ".*/localversion[^~]*"
919string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800920 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100921
Oleg Verych76c32952007-02-06 02:18:22 +0100922localver = $(subst $(space),, $(string) \
923 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200924
Sam Ravnborgcb584552006-01-09 21:20:34 +0100925# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
926# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200927# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100928#
Josh Huntb925dbf2009-02-12 10:16:05 -0800929# .scmversion is used when generating rpm packages so we do not loose
930# the version information from the SCM when we do the build of the kernel
931# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100932ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800933
934ifeq ($(wildcard .scmversion),)
935 _localver-auto = $(shell $(CONFIG_SHELL) \
936 $(srctree)/scripts/setlocalversion $(srctree))
937else
938 _localver-auto = $(shell cat .scmversion 2> /dev/null)
939endif
940
Sam Ravnborgcb584552006-01-09 21:20:34 +0100941 localver-auto = $(LOCALVERSION)$(_localver-auto)
942endif
943
944localver-full = $(localver)$(localver-auto)
945
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700946# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100947kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700948include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100949 $(Q)rm -f $@
950 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100951
952
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200954# or the modules are listed in "prepare".
955# A multi level approach is used. prepareN is processed before prepareN-1.
956# archprepare is used in arch Makefiles and when processed asm symlink,
957# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200959# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500960PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200961
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200962# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963# and if so do:
964# 1) Check that make has not been executed in the kernel src $(srctree)
965# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700966prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500968 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 echo " $(srctree) is not clean, please run 'make mrproper'";\
971 echo " in the '$(srctree)' directory.";\
972 /bin/false; \
973 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200974 $(Q)if [ ! -d include2 ]; then \
975 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200976 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200977 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978endif
979
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200980# prepare2 creates a makefile if using a separate output directory
981prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Roman Zippel3eb3c742007-01-10 14:45:28 +0100983prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
984 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200985 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200987archprepare: prepare1 scripts_basic
988
989prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200990 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200991 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200992
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800994prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200996# The asm symlink changes when $(ARCH) changes.
997# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200998# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200999define check-symlink
1000 set -e; \
1001 if [ -L include/asm ]; then \
1002 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
1003 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001004 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
1005 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001006 exit 1; \
1007 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001008 test -e $$asmlink || rm include/asm; \
1009 elif [ -d include/asm ]; then \
1010 echo "ERROR: $@ is a directory but a symlink was expected";\
1011 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001012 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001013endef
1014
1015# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001016# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001017# directory for generated filesas used by some architectures.
1018define create-symlink
1019 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001020 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001021 if [ ! -d include/asm-$(SRCARCH) ]; then \
1022 mkdir -p include/asm-$(SRCARCH); \
1023 fi; \
1024 ln -fsn asm-$(SRCARCH) $@; \
1025 fi
1026endef
1027
1028include/asm: FORCE
1029 $(Q)$(check-symlink)
1030 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032# Generate some files
1033# ---------------------------------------------------------------------------
1034
1035# KERNELRELEASE can change from a few different places, meaning version.h
1036# needs to be updated, so this check is forced on all builds
1037
1038uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001039define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001041 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1042 exit 1; \
1043 fi; \
1044 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045endef
1046
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001047define filechk_version.h
1048 (echo \#define LINUX_VERSION_CODE $(shell \
1049 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1050 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1051endef
1052
1053include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 $(call filechk,version.h)
1055
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001056include/linux/utsrelease.h: include/config/kernel.release FORCE
1057 $(call filechk,utsrelease.h)
1058
Vegard Nossum179efcb2008-12-16 12:33:43 +01001059PHONY += headerdep
1060headerdep:
1061 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063# ---------------------------------------------------------------------------
1064
Paul Smith4f193362006-03-05 17:14:10 -05001065PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066depend dep:
1067 @echo '*** Warning: make $@ is unnecessary now.'
1068
1069# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001070# Firmware install
1071INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1072export INSTALL_FW_PATH
1073
1074PHONY += firmware_install
1075firmware_install: FORCE
1076 @mkdir -p $(objtree)/firmware
1077 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1078
1079# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001080# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001081
Sam Ravnborge6883b12008-06-05 16:43:46 +02001082#Default location for installed headers
1083export INSTALL_HDR_PATH = $(objtree)/usr
1084
Sam Ravnborge6883b12008-06-05 16:43:46 +02001085hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001086# Find out where the Kbuild file is located to support
1087# arch/$(ARCH)/include/asm
1088hdr-dir = $(strip \
1089 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1090 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1091
1092# If we do an all arch process set dst to asm-$(hdr-arch)
1093hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001094
1095PHONY += __headers
1096__headers: include/linux/version.h scripts_basic FORCE
1097 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001098
1099PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001100headers_install_all:
1101 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001102
David Woodhouse8d730cf2006-06-18 11:58:39 +01001103PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001104headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001105 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1106 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001107 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001108 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001109
Mike Frysinger1f857122007-02-14 00:33:02 -08001110PHONY += headers_check_all
1111headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001112 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001113
David Woodhouse68475352006-06-18 12:02:10 +01001114PHONY += headers_check
1115headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001116 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001117 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001118
David Woodhouse8d730cf2006-06-18 11:58:39 +01001119# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120# Modules
1121
1122ifdef CONFIG_MODULES
1123
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001124# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
1126all: modules
1127
1128# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001129#
1130# A module can be listed more than once in obj-m resulting in
1131# duplicate lines in modules.order files. Those are removed
1132# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
Paul Smith4f193362006-03-05 17:14:10 -05001134PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001136 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001137 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001138 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001139 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
1141
1142# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001143PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001144modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001147PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148modules_install: _modinst_ _modinst_post
1149
Paul Smith4f193362006-03-05 17:14:10 -05001150PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001152 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 echo "Warning: you may need to install module-init-tools"; \
1154 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1155 sleep 1; \
1156 fi
1157 @rm -rf $(MODLIB)/kernel
1158 @rm -f $(MODLIB)/source
1159 @mkdir -p $(MODLIB)/kernel
1160 @ln -s $(srctree) $(MODLIB)/source
1161 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1162 rm -f $(MODLIB)/build ; \
1163 ln -s $(objtree) $(MODLIB)/build ; \
1164 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001165 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001166 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001168# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169# boot a modules.dep even before / is mounted read-write. However the
1170# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001171PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001173 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001174 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175
1176else # CONFIG_MODULES
1177
1178# Modules not configured
1179# ---------------------------------------------------------------------------
1180
1181modules modules_install: FORCE
1182 @echo
1183 @echo "The present kernel configuration has modules disabled."
1184 @echo "Type 'make config' and enable loadable module support."
1185 @echo "Then build a kernel with module support enabled."
1186 @echo
1187 @exit 1
1188
1189endif # CONFIG_MODULES
1190
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191###
1192# Cleaning is done on three levels.
1193# make clean Delete most generated files
1194# Leave enough to build external modules
1195# make mrproper Delete the current configuration, and all generated files
1196# make distclean Remove editor backup files, patch leftover files and the like
1197
1198# Directories & files removed with 'make clean'
1199CLEAN_DIRS += $(MODVERDIR)
1200CLEAN_FILES += vmlinux System.map \
1201 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1202
1203# Directories & files removed with 'make mrproper'
Sam Ravnborgf14875a2009-04-18 23:51:08 +02001204MRPROPER_DIRS += include/config include2 usr/include include/generated
Tore Anderson50aa88e2006-01-07 15:34:40 +01001205MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001206 include/linux/autoconf.h include/linux/version.h \
1207 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001208 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001209 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211# clean - Delete most, but leave enough to build external modules
1212#
1213clean: rm-dirs := $(CLEAN_DIRS)
1214clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001215clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
Paul Smith4f193362006-03-05 17:14:10 -05001217PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218$(clean-dirs):
1219 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1220
1221clean: archclean $(clean-dirs)
1222 $(call cmd,rmdirs)
1223 $(call cmd,rmfiles)
1224 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001225 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001226 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001227 -o -name '*.symtypes' -o -name 'modules.order' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001228 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1229 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230
1231# mrproper - Delete all generated files, including .config
1232#
1233mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1234mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1235mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1236
Paul Smith4f193362006-03-05 17:14:10 -05001237PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238$(mrproper-dirs):
1239 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1240
1241mrproper: clean archmrproper $(mrproper-dirs)
1242 $(call cmd,rmdirs)
1243 $(call cmd,rmfiles)
1244
1245# distclean
1246#
Paul Smith4f193362006-03-05 17:14:10 -05001247PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249distclean: mrproper
1250 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001251 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001253 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1255 -type f -print | xargs rm -f
1256
1257
1258# Packaging of the kernel to various formats
1259# ---------------------------------------------------------------------------
1260# rpm target kept for backward compatibility
1261package-dir := $(srctree)/scripts/package
1262
Zach Brown031ecc62006-06-08 22:12:37 -07001263%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001264 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001265rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001266 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
1268
1269# Brief documentation of the typical targets used
1270# ---------------------------------------------------------------------------
1271
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001272boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001274board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1275board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
1277help:
1278 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001279 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001280 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001281 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001282 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 @echo ''
1284 @echo 'Configuration targets:'
1285 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1286 @echo ''
1287 @echo 'Other generic targets:'
1288 @echo ' all - Build all targets marked with [*]'
1289 @echo '* vmlinux - Build the bare kernel'
1290 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001291 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001292 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1293 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 @echo ' dir/ - Build all files in dir and below'
1295 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001296 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001297 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 @echo ' tags/TAGS - Generate tags file for editors'
1299 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001300 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001301 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001302 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001303 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001304 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 @echo ' checkstack - Generate a list of stack hogs'
1307 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001308 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001309 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001310 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001311 @echo ' headers_check - Sanity check on exported headers'
1312 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001313 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001315 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 @echo ''
1317 @echo 'Documentation targets:'
1318 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1319 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001320 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001322 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 @echo ''
1324 @$(if $(boards), \
1325 $(foreach b, $(boards), \
1326 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1327 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001328 @$(if $(board-dirs), \
1329 $(foreach b, $(board-dirs), \
1330 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1331 printf " %-16s - Show all of the above\\n" help-boards; \
1332 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333
1334 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001335 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001337 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1338 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 @echo ''
1340 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1341 @echo 'For further info see the ./README file'
1342
1343
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001344help-board-dirs := $(addprefix help-,$(board-dirs))
1345
1346help-boards: $(help-board-dirs)
1347
1348boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1349
1350$(help-board-dirs): help-%:
1351 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1352 @$(if $(boards-per-dir), \
1353 $(foreach b, $(boards-per-dir), \
1354 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1355 echo '')
1356
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358# Documentation targets
1359# ---------------------------------------------------------------------------
1360%docs: scripts_basic FORCE
1361 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1362
1363else # KBUILD_EXTMOD
1364
1365###
1366# External module support.
1367# When building external modules the kernel used as basis is considered
1368# read-only, and no consistency checks are made and the make
1369# system is not used on the basis kernel. If updates are required
1370# in the basis kernel ordinary make commands (without M=...) must
1371# be used.
1372#
1373# The following are the only valid targets when building external
1374# modules.
1375# make M=dir clean Delete all automatically generated files
1376# make M=dir modules Make all modules in specified dir
1377# make M=dir Same as 'make M=dir modules'
1378# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001379# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380# Assumes install directory is already created
1381
1382# We are always building modules
1383KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001384PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001386 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
Paul Smith4f193362006-03-05 17:14:10 -05001388PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389$(objtree)/Module.symvers:
1390 @test -e $(objtree)/Module.symvers || ( \
1391 echo; \
1392 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1393 echo " is missing; modules will have no dependencies and modversions."; \
1394 echo )
1395
1396module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001397PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398$(module-dirs): crmodverdir $(objtree)/Module.symvers
1399 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1400
1401modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001402 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Paul Smith4f193362006-03-05 17:14:10 -05001405PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001406modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001407
Paul Smith4f193362006-03-05 17:14:10 -05001408install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1409PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001410_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001411 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001412 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Paul Smith4f193362006-03-05 17:14:10 -05001414PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001415_emodinst_post: _emodinst_
1416 $(call cmd,depmod)
1417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1419
Paul Smith4f193362006-03-05 17:14:10 -05001420PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421$(clean-dirs):
1422 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1423
1424clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001425clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1426 $(KBUILD_EXTMOD)/Module.markers \
1427 $(KBUILD_EXTMOD)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428clean: $(clean-dirs)
1429 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001430 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001432 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001433 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1434 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
1436help:
1437 @echo ' Building external modules.'
1438 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1439 @echo ''
1440 @echo ' modules - default target, build the module(s)'
1441 @echo ' modules_install - install the module'
1442 @echo ' clean - remove generated files in module directory only'
1443 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001444
1445# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001446PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001447prepare: ;
1448scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449endif # KBUILD_EXTMOD
1450
1451# Generate tags for editors
1452# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001453quiet_cmd_tags = GEN $@
1454 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Sam Ravnborga680eed2008-12-03 22:24:13 +01001456tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 $(call cmd,tags)
1458
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459# Scripts to check various things for consistency
1460# ---------------------------------------------------------------------------
1461
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462includecheck:
1463 find * $(RCS_FIND_IGNORE) \
1464 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001465 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466
1467versioncheck:
1468 find * $(RCS_FIND_IGNORE) \
1469 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001470 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472namespacecheck:
1473 $(PERL) $(srctree)/scripts/namespace.pl
1474
Adrian Bunk295ac052007-08-24 23:04:56 +02001475export_report:
1476 $(PERL) $(srctree)/scripts/export_report.pl
1477
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478endif #ifeq ($(config-targets),1)
1479endif #ifeq ($(mixed-targets),1)
1480
Roman Zippelc30a02e2006-06-08 22:12:50 -07001481PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001482
Jeff Dike011e3a92006-12-13 00:34:12 -08001483# UML needs a little special treatment here. It wants to use the host
1484# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1485# else wants $(ARCH), including people doing cross-builds, which means
1486# that $(SUBARCH) doesn't work here.
1487ifeq ($(ARCH), um)
1488CHECKSTACK_ARCH := $(SUBARCH)
1489else
1490CHECKSTACK_ARCH := $(ARCH)
1491endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492checkstack:
1493 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001494 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495
1496kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001497 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1498 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001499kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001500 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
Sam Ravnborg06300b22006-01-25 07:13:18 +01001502# Single targets
1503# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001504# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001505# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001506# - build with separate output dir 'make O=...'
1507# - external modules
1508#
1509# target-dir => where to store outputfile
1510# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001511
Sam Ravnborg06300b22006-01-25 07:13:18 +01001512ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001513 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001514 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001515else
1516 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001517 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1518 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001519endif
1520
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001521%.s: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1523%.i: %.c prepare scripts FORCE
1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1525%.o: %.c prepare scripts FORCE
1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1527%.lst: %.c prepare scripts FORCE
1528 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1529%.s: %.S prepare scripts FORCE
1530 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1531%.o: %.S prepare scripts FORCE
1532 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001533%.symtypes: %.c prepare scripts FORCE
1534 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001535
1536# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001537/: prepare scripts FORCE
1538 $(cmd_crmodverdir)
1539 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1540 $(build)=$(build-dir)
1541%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001542 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001543 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001544 $(build)=$(build-dir)
1545%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001546 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001547 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001548 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001549 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001550
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551# FIXME Should go into a make.lib or something
1552# ===========================================================================
1553
1554quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1555 cmd_rmdirs = rm -rf $(rm-dirs)
1556
1557quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1558 cmd_rmfiles = rm -f $(rm-files)
1559
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001560# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001561quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1562 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001563 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001564 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001565 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001566 $(KERNELRELEASE); \
1567 fi
1568
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001569# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001570# clean it up only when building all modules
1571cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1572 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Sam Ravnborg222d3942007-10-15 21:59:31 +02001574a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001575 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001576 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
1578quiet_cmd_as_o_S = AS $@
1579cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1580
1581# read all saved command lines
1582
1583targets := $(wildcard $(sort $(targets)))
1584cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1585
1586ifneq ($(cmd_files),)
1587 $(cmd_files): ; # Do not try to update included dependency files
1588 include $(cmd_files)
1589endif
1590
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1592# Usage:
1593# $(Q)$(MAKE) $(clean)=dir
1594clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1595
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596endif # skip-makefile
1597
Paul Smith4f193362006-03-05 17:14:10 -05001598PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001600
Paul Smith4f193362006-03-05 17:14:10 -05001601# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001602# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001603.PHONY: $(PHONY)