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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds577c9c42009-04-07 14:25:01 -07003SUBLEVEL = 30
Linus Torvalds07a20392009-06-09 20:05:27 -07004EXTRAVERSION =
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
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
Cheng Renquanb8b06182009-05-26 16:03:07 +080038ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040endif
41ifndef KBUILD_VERBOSE
42 KBUILD_VERBOSE = 0
43endif
44
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040045# Call a source code checker (by default, "sparse") as part of the
46# C compilation.
47#
48# Use 'make C=1' to enable checking of only re-compiled files.
49# Use 'make C=2' to enable checking of *all* source files, regardless
50# of whether they are re-compiled or not.
51#
52# See the file "Documentation/sparse.txt" for more details, including
53# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Cheng Renquanb8b06182009-05-26 16:03:07 +080055ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057endif
58ifndef KBUILD_CHECKSRC
59 KBUILD_CHECKSRC = 0
60endif
61
62# Use make M=dir to specify directory of external module to build
63# Old syntax make ... SUBDIRS=$PWD is still supported
64# Setting the environment variable KBUILD_EXTMOD take precedence
65ifdef SUBDIRS
66 KBUILD_EXTMOD ?= $(SUBDIRS)
67endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Cheng Renquanb8b06182009-05-26 16:03:07 +080069ifeq ("$(origin M)", "command line")
70 KBUILD_EXTMOD := $(M)
71endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73# kbuild supports saving output files in a separate directory.
74# To locate output files in a separate directory two syntaxes are supported.
75# In both cases the working directory must be the root of the kernel src.
76# 1) O=
77# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020078#
Linus Torvalds1da177e2005-04-16 15:20:36 -070079# 2) Set KBUILD_OUTPUT
80# Set the environment variable KBUILD_OUTPUT to point to the directory
81# where the output files shall be placed.
82# export KBUILD_OUTPUT=dir/to/store/output/files/
83# make
84#
85# The O= assignment takes precedence over the KBUILD_OUTPUT environment
86# variable.
87
88
89# KBUILD_SRC is set on invocation of make in OBJ directory
90# KBUILD_SRC is not intended to be used by the regular user (for now)
91ifeq ($(KBUILD_SRC),)
92
93# OK, Make called in directory where kernel src resides
94# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +080095ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097endif
98
99# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500100PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101_all:
102
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100103# Cancel implicit rules on top Makefile
104$(CURDIR)/Makefile Makefile: ;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106ifneq ($(KBUILD_OUTPUT),)
107# Invoke a second make in the output directory, passing relevant variables
108# check that the output directory actually exists
109saved-output := $(KBUILD_OUTPUT)
110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
111$(if $(KBUILD_OUTPUT),, \
112 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Milton Miller0b357862007-09-21 18:09:02 -0500114PHONY += $(MAKECMDGOALS) sub-make
115
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500117 $(Q)@:
118
119sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
121 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
123 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125# Leave processing to above invocation of make
126skip-makefile := 1
127endif # ifneq ($(KBUILD_OUTPUT),)
128endif # ifeq ($(KBUILD_SRC),)
129
130# We process the rest of the Makefile if this is the final invocation of make
131ifeq ($(skip-makefile),)
132
133# If building an external module we do not care about the all: rule
134# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500135PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136ifeq ($(KBUILD_EXTMOD),)
137_all: all
138else
139_all: modules
140endif
141
142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
143TOPDIR := $(srctree)
144# FIXME - TOPDIR is obsolete, use srctree/objtree
145objtree := $(CURDIR)
146src := $(srctree)
147obj := $(objtree)
148
Mattia Dongili0f558c32006-02-19 13:50:37 +0100149VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151export srctree objtree VPATH TOPDIR
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154# SUBARCH tells the usermode build what the underlying arch is. That is set
155# first, and if a usermode build is happening, the "ARCH=um" on the command
156# line overrides the setting of ARCH below. If a native build is happening,
157# then ARCH is assigned, getting whatever value it gets normally, and
158# SUBARCH is subsequently ignored.
159
160SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
161 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800162 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900163 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900164 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166# Cross compiling and selecting different set of gcc/bin-utils
167# ---------------------------------------------------------------------------
168#
169# When performing cross compilation for other architectures ARCH shall be set
170# to the target architecture. (See arch/* for the possibilities).
171# ARCH can be set during invocation of make:
172# make ARCH=ia64
173# Another way is to have ARCH set in the environment.
174# The default ARCH is the host where make is executed.
175
176# CROSS_COMPILE specify the prefix used for all executables used
177# during compilation. Only gcc and related bin-utils executables
178# are prefixed with $(CROSS_COMPILE).
179# CROSS_COMPILE can be set on the command line
180# make CROSS_COMPILE=ia64-linux-
181# Alternatively CROSS_COMPILE can be set in the environment.
182# Default value for CROSS_COMPILE is not to prefix executables
183# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100184export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185ARCH ?= $(SUBARCH)
186CROSS_COMPILE ?=
187
188# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200189UTS_MACHINE := $(ARCH)
190SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Sam Ravnborgd746d642007-11-12 20:14:19 +0100192# Additional ARCH settings for x86
193ifeq ($(ARCH),i386)
194 SRCARCH := x86
195endif
196ifeq ($(ARCH),x86_64)
197 SRCARCH := x86
198endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200199
Sam Ravnborg5e538792008-12-02 23:17:12 -0800200# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200201ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800202 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200203endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200204
Paul Mundt3cc000b2009-04-11 08:39:27 +0900205# Additional ARCH settings for sh
206ifeq ($(ARCH),sh64)
207 SRCARCH := sh
208endif
209
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210# Where to locate arch specific headers
211hdr-arch := $(SRCARCH)
212
Sam Ravnborg49148022009-01-16 21:58:10 +1000213ifeq ($(ARCH),m68knommu)
214 hdr-arch := m68k
215endif
216
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700217KCONFIG_CONFIG ?= .config
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219# SHELL used by kbuild
220CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
221 else if [ -x /bin/bash ]; then echo /bin/bash; \
222 else echo sh; fi ; fi)
223
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200224HOSTCC = gcc
225HOSTCXX = g++
226HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
227HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200229# Decide whether to build built-in, modular, or both.
230# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232KBUILD_MODULES :=
233KBUILD_BUILTIN := 1
234
235# If we have only "make modules", don't compile built-in objects.
236# When we're building modules with modversions, we need to consider
237# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200238# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240ifeq ($(MAKECMDGOALS),modules)
241 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
242endif
243
244# If we have "make <whatever> modules", compile modules
245# in addition to whatever we do anyway.
246# Just "make" or "make all" shall build modules as well
247
248ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
249 KBUILD_MODULES := 1
250endif
251
252ifeq ($(MAKECMDGOALS),)
253 KBUILD_MODULES := 1
254endif
255
Sam Ravnborge579d352005-07-27 08:10:10 +0200256export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
258
259# Beautify output
260# ---------------------------------------------------------------------------
261#
262# Normally, we echo the whole command before executing it. By making
263# that echo $($(quiet)$(cmd)), we now have the possibility to set
264# $(quiet) to choose other forms of output instead, e.g.
265#
266# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
267# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
268#
269# If $(quiet) is empty, the whole command will be printed.
270# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200271# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272# the variable $(silent_cmd_cc_o_c) doesn't exist.
273#
Adrian Bunka58a4142006-01-10 00:08:17 +0100274# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275# for commands that shall be hidden in non-verbose mode.
276#
277# $(Q)ln $@ :<
278#
279# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
280# If KBUILD_VERBOSE equals 1 then the above command is displayed.
281
282ifeq ($(KBUILD_VERBOSE),1)
283 quiet =
284 Q =
285else
286 quiet=quiet_
287 Q = @
288endif
289
290# If the user is running make -s (silent mode), suppress echoing of
291# commands
292
293ifneq ($(findstring s,$(MAKEFLAGS)),)
294 quiet=silent_
295endif
296
297export quiet Q KBUILD_VERBOSE
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300# Look for make include files relative to root of kernel src
301MAKEFLAGS += --include-dir=$(srctree)
302
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100303# We need some generic definitions (do not try to remake the file).
304$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800305include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
307# Make variables (CC, etc...)
308
309AS = $(CROSS_COMPILE)as
310LD = $(CROSS_COMPILE)ld
311CC = $(CROSS_COMPILE)gcc
312CPP = $(CC) -E
313AR = $(CROSS_COMPILE)ar
314NM = $(CROSS_COMPILE)nm
315STRIP = $(CROSS_COMPILE)strip
316OBJCOPY = $(CROSS_COMPILE)objcopy
317OBJDUMP = $(CROSS_COMPILE)objdump
318AWK = awk
319GENKSYMS = scripts/genksyms/genksyms
320DEPMOD = /sbin/depmod
321KALLSYMS = scripts/kallsyms
322PERL = perl
323CHECK = sparse
324
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100325CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
326 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327MODFLAGS = -DMODULE
328CFLAGS_MODULE = $(MODFLAGS)
329AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700330LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331CFLAGS_KERNEL =
332AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700333CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335
336# Use LINUXINCLUDE when you must reference the include/ directory.
337# Needed to be compatible with the O= option
338LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100339 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200340 -I$(srctree)/arch/$(hdr-arch)/include \
341 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100343KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200345KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700346 -fno-strict-aliasing -fno-common \
347 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200348KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700350# Read KERNELRELEASE from include/config/kernel.release (if it exists)
351KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100352KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100353
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200354export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100355export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200356export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
357export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Sam Ravnborg06c50402007-10-15 22:17:25 +0200359export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700360export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200361export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363# When compiling out-of-tree modules, put MODVERDIR in the module
364# tree rather than in the kernel tree. The kernel tree might
365# even be read-only.
366export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368# Files to ignore in find ... statements
369
Trond Myklebust406119f2005-10-27 14:46:53 -0400370RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
371export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373# ===========================================================================
374# Rules shared between *config targets and build targets
375
376# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500377PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378scripts_basic:
379 $(Q)$(MAKE) $(build)=scripts/basic
380
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200381# To avoid any implicit rule to kick in, define an empty command.
382scripts/basic/%: scripts_basic ;
383
Paul Smith4f193362006-03-05 17:14:10 -0500384PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200385# outputmakefile generates a Makefile in the output directory, if using a
386# separate output directory. This allows convenient use of make in the
387# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200389ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100390 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200391 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
392 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
393endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395# To make sure we do not include .config for any of the *config targets
396# catch them early, and hand them over to scripts/kconfig/Makefile
397# It is allowed to specify more targets when calling make, including
398# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200399# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400# Detect when mixed targets is specified, and make a second invocation
401# of make so .config is not included in this case either (for *config).
402
Roman Zippel3eb3c742007-01-10 14:45:28 +0100403no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700404 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100405 include/linux/version.h headers_% \
406 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
408config-targets := 0
409mixed-targets := 0
410dot-config := 1
411
412ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
413 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 dot-config := 0
415 endif
416endif
417
418ifeq ($(KBUILD_EXTMOD),)
419 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
420 config-targets := 1
421 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
422 mixed-targets := 1
423 endif
424 endif
425endif
426
427ifeq ($(mixed-targets),1)
428# ===========================================================================
429# We're called with mixed targets (*config and build targets).
430# Handle them one by one.
431
432%:: FORCE
433 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
434
435else
436ifeq ($(config-targets),1)
437# ===========================================================================
438# *config targets only - make sure prerequisites are updated, and descend
439# in scripts/kconfig to make the *config target
440
441# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
442# KBUILD_DEFCONFIG may point out an alternative default configuration
443# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200444include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400445export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100447config: scripts_basic outputmakefile FORCE
448 $(Q)mkdir -p include/linux include/config
449 $(Q)$(MAKE) $(build)=scripts/kconfig $@
450
451%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700452 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454
455else
456# ===========================================================================
457# Build targets only - this includes vmlinux, arch specific targets, clean
458# targets and others. In general all targets except *config targets.
459
460ifeq ($(KBUILD_EXTMOD),)
461# Additional helpers built in scripts/
462# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200463# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500464PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700465scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 $(Q)$(MAKE) $(build)=$(@)
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468# Objects we will link into vmlinux / subdirs we need to visit
469init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100470drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471net-y := net/
472libs-y := lib/
473core-y := usr/
474endif # KBUILD_EXTMOD
475
476ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200477# Read in config
478-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200480ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481# Read in dependencies to all Kconfig* files, make sure to run
482# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700483-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700486$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Roman Zippelc955cca2006-06-08 22:12:39 -0700488# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100489# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200490# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100491# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700492include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
494else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200495# external modules needs include/linux/autoconf.h and include/config/auto.conf
496# but do not care if they are up-to-date. Use auto.conf to trigger the test
497PHONY += include/config/auto.conf
498
499include/config/auto.conf:
500 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
501 echo; \
502 echo " ERROR: Kernel configuration is invalid."; \
503 echo " include/linux/autoconf.h or $@ are missing."; \
504 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
505 echo; \
506 /bin/false)
507
508endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510else
511# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700512include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200513endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515# The all: target is the default when no target is given on the
516# command line.
517# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200518# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519all: vmlinux
520
521ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200522KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200524KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525endif
526
Ralf Baechlebef5b542008-07-16 13:02:24 +0100527include $(srctree)/arch/$(SRCARCH)/Makefile
528
Mike Frysinger08f67462009-06-04 16:29:08 -0700529ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100530KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
531endif
532
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100533# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900534ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100535KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900536endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200539KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200541KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542endif
543
544ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200545KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200546KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547endif
548
Steven Rostedt606576c2008-10-06 19:06:12 -0400549ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200550KBUILD_CFLAGS += -pg
551endif
552
Sam Ravnborg91341d42008-01-21 21:31:44 +0100553# We trigger additional mismatches with less inlining
554ifdef CONFIG_DEBUG_SECTION_MISMATCH
555KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
556endif
557
Sam Ravnborge8e69932005-04-30 16:51:42 -0700558# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700559NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700560CHECKFLAGS += $(NOSTDINC_FLAGS)
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200563KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200565# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200566KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400568# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsd0115552009-03-19 15:53:19 -0700569KBUILD_CFLAGS += $(call cc-option,-fwrapv)
570
Kyle McMartin00308642009-03-23 15:25:49 -0400571# revert to pre-gcc-4.4 behaviour of .eh_frame
572KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
573
Sam Ravnborg06c50402007-10-15 22:17:25 +0200574# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100575# But warn user when we do so
576warn-assign = \
577$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
578
579ifneq ($(KCPPFLAGS),)
580 $(call warn-assign,CPPFLAGS)
581 KBUILD_CPPFLAGS += $(KCPPFLAGS)
582endif
583ifneq ($(KAFLAGS),)
584 $(call warn-assign,AFLAGS)
585 KBUILD_AFLAGS += $(KAFLAGS)
586endif
587ifneq ($(KCFLAGS),)
588 $(call warn-assign,CFLAGS)
589 KBUILD_CFLAGS += $(KCFLAGS)
590endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200591
Roland McGrath18991192007-07-19 01:48:40 -0700592# Use --build-id when available.
593LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
594 $(call ld-option, -Wl$(comma)--build-id,))
595LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
596LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
597
David Howells5d7d18f2009-03-04 11:59:07 -0800598ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
599LDFLAGS_vmlinux += -X
600endif
601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200603# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604# set in the environment
605# Also any assignments in arch/$(ARCH)/Makefile take precedence over
606# this default value
607export KBUILD_IMAGE ?= vmlinux
608
609#
610# INSTALL_PATH specifies where to place the updated kernel and system map
611# images. Default is /boot, but you can set it to other values
612export INSTALL_PATH ?= /boot
613
614#
615# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
616# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200617# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618#
619
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100620MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621export MODLIB
622
Theodore Ts'oac031f22006-06-21 20:53:09 -0400623#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100624# INSTALL_MOD_STRIP, if defined, will cause modules to be
625# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
626# the default option --strip-debug will be used. Otherwise,
627# INSTALL_MOD_STRIP will used as the options to the strip command.
628
Theodore Ts'oac031f22006-06-21 20:53:09 -0400629ifdef INSTALL_MOD_STRIP
630ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100631mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400632else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100633mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400634endif # INSTALL_MOD_STRIP=1
635else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100636mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400637endif # INSTALL_MOD_STRIP
638export mod_strip_cmd
639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100642core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
645 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
646 $(net-y) $(net-m) $(libs-y) $(libs-m)))
647
648vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
649 $(init-n) $(init-) \
650 $(core-n) $(core-) $(drivers-n) $(drivers-) \
651 $(net-n) $(net-) $(libs-n) $(libs-))))
652
653init-y := $(patsubst %/, %/built-in.o, $(init-y))
654core-y := $(patsubst %/, %/built-in.o, $(core-y))
655drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
656net-y := $(patsubst %/, %/built-in.o, $(net-y))
657libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
658libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
659libs-y := $(libs-y1) $(libs-y2)
660
661# Build vmlinux
662# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200663# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200665# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666# Ordering when linking is important, and $(vmlinux-init) must be first.
667#
668# vmlinux
669# ^
670# |
671# +-< $(vmlinux-init)
672# | +--< init/version.o + more
673# |
674# +--< $(vmlinux-main)
675# | +--< driver/built-in.o mm/built-in.o + more
676# |
677# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
678#
679# vmlinux version (uname -v) cannot be updated during normal
680# descending-into-subdirs phase since we do not yet know if we need to
681# update vmlinux.
682# Therefore this step is delayed until just before final link of vmlinux -
683# except in the kallsyms case where it is done just before adding the
684# symbols to the kernel.
685#
686# System.map is generated to document addresses of all kernel symbols
687
688vmlinux-init := $(head-y) $(init-y)
689vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
690vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200691vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100692export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
694# Rule to link vmlinux - also used during CONFIG_KALLSYMS
695# May be overridden by arch/$(ARCH)/Makefile
696quiet_cmd_vmlinux__ ?= LD $@
697 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
698 -T $(vmlinux-lds) $(vmlinux-init) \
699 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200700 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702# Generate new vmlinux version
703quiet_cmd_vmlinux_version = GEN .version
704 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200705 if [ ! -r .version ]; then \
706 rm -f .version; \
707 echo 1 >.version; \
708 else \
709 mv .version .old_version; \
710 expr 0$$(cat .old_version) + 1 >.version; \
711 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 $(MAKE) $(build)=init
713
714# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200715quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
717
718# Link of vmlinux
719# If CONFIG_KALLSYMS is set .version is already updated
720# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700721# Use + in front of the vmlinux_version rule to silent warning with make -j2
722# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700724 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
726
727 $(call cmd,vmlinux__)
728 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
729
Sam Ravnborg46352812006-08-08 21:41:18 +0200730 $(Q)$(if $($(quiet)cmd_sysmap), \
731 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
732 $(cmd_sysmap) $@ System.map; \
733 if [ $$? -ne 0 ]; then \
734 rm -f $@; \
735 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 fi;
737 $(verify_kallsyms)
738endef
739
740
741ifdef CONFIG_KALLSYMS
742# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
743# It's a three stage process:
744# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
745# empty
746# Running kallsyms on that gives us .tmp_kallsyms1.o with
747# the right size - vmlinux version (uname -v) is updated during this step
748# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
749# but due to the added section, some addresses have shifted.
750# From here, we generate a correct .tmp_kallsyms2.o
751# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
752# o Verify that the System.map from vmlinux matches the map from
753# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
754# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
755# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
756# temporary bypass to allow the kernel to be built while the
757# maintainers work out what went wrong with kallsyms.
758
759ifdef CONFIG_KALLSYMS_EXTRA_PASS
760last_kallsyms := 3
761else
762last_kallsyms := 2
763endif
764
765kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
766
767define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200768 $(Q)$(if $($(quiet)cmd_sysmap), \
769 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200771 $(Q)cmp -s System.map .tmp_System.map || \
772 (echo Inconsistent kallsyms data; \
773 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 rm .tmp_kallsyms* ; /bin/false )
775endef
776
777# Update vmlinux version before link
778# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200779# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780cmd_ksym_ld = $(cmd_vmlinux__)
781define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200782 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 +$(call cmd,vmlinux_version)
784 $(call cmd,vmlinux__)
785 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
786endef
787
788# Generate .S file with all kernel symbols
789quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100790 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
791 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100793.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 $(call if_changed_dep,as_o_S)
795
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100796.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 $(call cmd,kallsyms)
798
799# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100800.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
801 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100803.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
804 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100806.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
807 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809# Needs to visit scripts/ before $(KALLSYMS) can be used.
810$(KALLSYMS): scripts ;
811
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000812# Generate some data for debugging strange kallsyms problems
813debug_kallsyms: .tmp_map$(last_kallsyms)
814
815.tmp_map%: .tmp_vmlinux% FORCE
816 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
817
818.tmp_map3: .tmp_map2
819
820.tmp_map2: .tmp_map1
821
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822endif # ifdef CONFIG_KALLSYMS
823
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200824# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
825# relevant sections renamed as per the linker script.
826quiet_cmd_vmlinux-modpost = LD $@
827 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
828 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200829 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200830define rule_vmlinux-modpost
831 :
832 +$(call cmd,vmlinux-modpost)
833 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
834 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
835endef
836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100838vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700839ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100840 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700841endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700842ifdef CONFIG_SAMPLES
843 $(Q)$(MAKE) $(build)=samples
844endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700845ifdef CONFIG_BUILD_DOCSRC
846 $(Q)$(MAKE) $(build)=Documentation
847endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200848 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200850 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Sam Ravnborg310f8242008-01-21 22:57:09 +0100852# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100853ifdef CONFIG_KALLSYMS
854.tmp_vmlinux1: vmlinux.o
855endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200856
857modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
858vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200859 $(call if_changed_rule,vmlinux-modpost)
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861# The actual objects are generated when descending,
862# make sure no implicit rule kicks in
863$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
864
865# Handle descending into subdirectories listed in $(vmlinux-dirs)
866# Preset locale variables to speed up the build process. Limit locale
867# tweaks to this spot to avoid wrong language settings when running
868# make menuconfig etc.
869# Error messages still appears in the original language
870
Paul Smith4f193362006-03-05 17:14:10 -0500871PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200872$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 $(Q)$(MAKE) $(build)=$@
874
Sam Ravnborgcb584552006-01-09 21:20:34 +0100875# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100876#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400877# The KERNELRELEASE value built here is stored in the file
878# include/config/kernel.release, and is used when executing several
879# make targets, such as "make install" or "make modules_install."
880#
881# The eventual kernel release string consists of the following fields,
882# shown in a hierarchical format to show how smaller parts are concatenated
883# to form the larger and final value, with values coming from places like
884# the Makefile, kernel config options, make command line options and/or
885# SCM tag information.
886#
887# $(KERNELVERSION)
888# $(VERSION) eg, 2
889# $(PATCHLEVEL) eg, 6
890# $(SUBLEVEL) eg, 18
891# $(EXTRAVERSION) eg, -rc6
892# $(localver-full)
893# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100894# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400895# $(CONFIG_LOCALVERSION) (from kernel config setting)
896# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
897# ./scripts/setlocalversion (SCM tag, if one exists)
898# $(LOCALVERSION) (from make command line if provided)
899#
900# Note how the final $(localver-auto) string is included *only* if the
901# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
902# moment, only git is supported but other SCMs can edit the script
903# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100904
Oleg Verych76c32952007-02-06 02:18:22 +0100905pattern = ".*/localversion[^~]*"
906string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800907 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100908
Oleg Verych76c32952007-02-06 02:18:22 +0100909localver = $(subst $(space),, $(string) \
910 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200911
Sam Ravnborgcb584552006-01-09 21:20:34 +0100912# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
913# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200914# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100915#
Josh Huntb925dbf2009-02-12 10:16:05 -0800916# .scmversion is used when generating rpm packages so we do not loose
917# the version information from the SCM when we do the build of the kernel
918# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100919ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800920
921ifeq ($(wildcard .scmversion),)
922 _localver-auto = $(shell $(CONFIG_SHELL) \
923 $(srctree)/scripts/setlocalversion $(srctree))
924else
925 _localver-auto = $(shell cat .scmversion 2> /dev/null)
926endif
927
Sam Ravnborgcb584552006-01-09 21:20:34 +0100928 localver-auto = $(LOCALVERSION)$(_localver-auto)
929endif
930
931localver-full = $(localver)$(localver-auto)
932
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700933# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100934kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700935include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100936 $(Q)rm -f $@
937 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100938
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200941# or the modules are listed in "prepare".
942# A multi level approach is used. prepareN is processed before prepareN-1.
943# archprepare is used in arch Makefiles and when processed asm symlink,
944# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200946# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500947PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200948
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200949# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950# and if so do:
951# 1) Check that make has not been executed in the kernel src $(srctree)
952# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700953prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500955 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700956 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 echo " $(srctree) is not clean, please run 'make mrproper'";\
958 echo " in the '$(srctree)' directory.";\
959 /bin/false; \
960 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200961 $(Q)if [ ! -d include2 ]; then \
962 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200963 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200964 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965endif
966
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200967# prepare2 creates a makefile if using a separate output directory
968prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
Roman Zippel3eb3c742007-01-10 14:45:28 +0100970prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
971 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200972 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200974archprepare: prepare1 scripts_basic
975
976prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200977 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200978 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800981prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200983# Leave this as default for preprocessing vmlinux.lds.S, which is now
984# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
986export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
987
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200988# The asm symlink changes when $(ARCH) changes.
989# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200990# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200991define check-symlink
992 set -e; \
993 if [ -L include/asm ]; then \
994 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
995 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200996 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
997 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200998 exit 1; \
999 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001000 test -e $$asmlink || rm include/asm; \
1001 elif [ -d include/asm ]; then \
1002 echo "ERROR: $@ is a directory but a symlink was expected";\
1003 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001004 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001005endef
1006
1007# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001008# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001009# directory for generated filesas used by some architectures.
1010define create-symlink
1011 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001012 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001013 if [ ! -d include/asm-$(SRCARCH) ]; then \
1014 mkdir -p include/asm-$(SRCARCH); \
1015 fi; \
1016 ln -fsn asm-$(SRCARCH) $@; \
1017 fi
1018endef
1019
1020include/asm: FORCE
1021 $(Q)$(check-symlink)
1022 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024# Generate some files
1025# ---------------------------------------------------------------------------
1026
1027# KERNELRELEASE can change from a few different places, meaning version.h
1028# needs to be updated, so this check is forced on all builds
1029
1030uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001031define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001033 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1034 exit 1; \
1035 fi; \
1036 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037endef
1038
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001039define filechk_version.h
1040 (echo \#define LINUX_VERSION_CODE $(shell \
1041 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1042 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1043endef
1044
1045include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 $(call filechk,version.h)
1047
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001048include/linux/utsrelease.h: include/config/kernel.release FORCE
1049 $(call filechk,utsrelease.h)
1050
Vegard Nossum179efcb2008-12-16 12:33:43 +01001051PHONY += headerdep
1052headerdep:
1053 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1054
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055# ---------------------------------------------------------------------------
1056
Paul Smith4f193362006-03-05 17:14:10 -05001057PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058depend dep:
1059 @echo '*** Warning: make $@ is unnecessary now.'
1060
1061# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001062# Firmware install
1063INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1064export INSTALL_FW_PATH
1065
1066PHONY += firmware_install
1067firmware_install: FORCE
1068 @mkdir -p $(objtree)/firmware
1069 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1070
1071# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001072# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001073
Sam Ravnborge6883b12008-06-05 16:43:46 +02001074#Default location for installed headers
1075export INSTALL_HDR_PATH = $(objtree)/usr
1076
Sam Ravnborge6883b12008-06-05 16:43:46 +02001077hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001078# Find out where the Kbuild file is located to support
1079# arch/$(ARCH)/include/asm
1080hdr-dir = $(strip \
1081 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1082 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1083
1084# If we do an all arch process set dst to asm-$(hdr-arch)
1085hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001086
1087PHONY += __headers
1088__headers: include/linux/version.h scripts_basic FORCE
1089 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001090
1091PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001092headers_install_all:
1093 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001094
David Woodhouse8d730cf2006-06-18 11:58:39 +01001095PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001096headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001097 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1098 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001099 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001100 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001101
Mike Frysinger1f857122007-02-14 00:33:02 -08001102PHONY += headers_check_all
1103headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001104 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001105
David Woodhouse68475352006-06-18 12:02:10 +01001106PHONY += headers_check
1107headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001108 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001109 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001110
David Woodhouse8d730cf2006-06-18 11:58:39 +01001111# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112# Modules
1113
1114ifdef CONFIG_MODULES
1115
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001116# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117
1118all: modules
1119
1120# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001121#
1122# A module can be listed more than once in obj-m resulting in
1123# duplicate lines in modules.order files. Those are removed
1124# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
Paul Smith4f193362006-03-05 17:14:10 -05001126PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001128 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001129 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133
1134# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001135PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001136modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
1138# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001139PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140modules_install: _modinst_ _modinst_post
1141
Paul Smith4f193362006-03-05 17:14:10 -05001142PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001144 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 echo "Warning: you may need to install module-init-tools"; \
1146 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1147 sleep 1; \
1148 fi
1149 @rm -rf $(MODLIB)/kernel
1150 @rm -f $(MODLIB)/source
1151 @mkdir -p $(MODLIB)/kernel
1152 @ln -s $(srctree) $(MODLIB)/source
1153 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1154 rm -f $(MODLIB)/build ; \
1155 ln -s $(objtree) $(MODLIB)/build ; \
1156 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001157 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001158 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001160# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161# boot a modules.dep even before / is mounted read-write. However the
1162# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001163PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001165 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001166 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
1168else # CONFIG_MODULES
1169
1170# Modules not configured
1171# ---------------------------------------------------------------------------
1172
1173modules modules_install: FORCE
1174 @echo
1175 @echo "The present kernel configuration has modules disabled."
1176 @echo "Type 'make config' and enable loadable module support."
1177 @echo "Then build a kernel with module support enabled."
1178 @echo
1179 @exit 1
1180
1181endif # CONFIG_MODULES
1182
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183###
1184# Cleaning is done on three levels.
1185# make clean Delete most generated files
1186# Leave enough to build external modules
1187# make mrproper Delete the current configuration, and all generated files
1188# make distclean Remove editor backup files, patch leftover files and the like
1189
1190# Directories & files removed with 'make clean'
1191CLEAN_DIRS += $(MODVERDIR)
1192CLEAN_FILES += vmlinux System.map \
1193 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1194
1195# Directories & files removed with 'make mrproper'
Sam Ravnborgf14875a2009-04-18 23:51:08 +02001196MRPROPER_DIRS += include/config include2 usr/include include/generated
Tore Anderson50aa88e2006-01-07 15:34:40 +01001197MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001198 include/linux/autoconf.h include/linux/version.h \
1199 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001200 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001201 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
1203# clean - Delete most, but leave enough to build external modules
1204#
1205clean: rm-dirs := $(CLEAN_DIRS)
1206clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001207clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Paul Smith4f193362006-03-05 17:14:10 -05001209PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210$(clean-dirs):
1211 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1212
1213clean: archclean $(clean-dirs)
1214 $(call cmd,rmdirs)
1215 $(call cmd,rmfiles)
1216 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001217 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001218 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001219 -o -name '*.symtypes' -o -name 'modules.order' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001220 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1221 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
1223# mrproper - Delete all generated files, including .config
1224#
1225mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1226mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1227mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1228
Paul Smith4f193362006-03-05 17:14:10 -05001229PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230$(mrproper-dirs):
1231 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1232
1233mrproper: clean archmrproper $(mrproper-dirs)
1234 $(call cmd,rmdirs)
1235 $(call cmd,rmfiles)
1236
1237# distclean
1238#
Paul Smith4f193362006-03-05 17:14:10 -05001239PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
1241distclean: mrproper
1242 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001243 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001245 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1247 -type f -print | xargs rm -f
1248
1249
1250# Packaging of the kernel to various formats
1251# ---------------------------------------------------------------------------
1252# rpm target kept for backward compatibility
1253package-dir := $(srctree)/scripts/package
1254
Zach Brown031ecc62006-06-08 22:12:37 -07001255%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001256 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001257rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001258 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260
1261# Brief documentation of the typical targets used
1262# ---------------------------------------------------------------------------
1263
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001264boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001266board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1267board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269help:
1270 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001271 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001272 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001273 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001274 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 @echo ''
1276 @echo 'Configuration targets:'
1277 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1278 @echo ''
1279 @echo 'Other generic targets:'
1280 @echo ' all - Build all targets marked with [*]'
1281 @echo '* vmlinux - Build the bare kernel'
1282 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001283 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001284 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1285 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 @echo ' dir/ - Build all files in dir and below'
1287 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001288 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001289 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 @echo ' tags/TAGS - Generate tags file for editors'
1291 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001292 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001293 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001294 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001295 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001296 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 @echo ' checkstack - Generate a list of stack hogs'
1299 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001300 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001301 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001302 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001303 @echo ' headers_check - Sanity check on exported headers'
1304 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001305 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001307 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 @echo ''
1309 @echo 'Documentation targets:'
1310 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1311 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001312 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001314 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 @echo ''
1316 @$(if $(boards), \
1317 $(foreach b, $(boards), \
1318 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1319 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001320 @$(if $(board-dirs), \
1321 $(foreach b, $(board-dirs), \
1322 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1323 printf " %-16s - Show all of the above\\n" help-boards; \
1324 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
1326 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001327 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001329 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1330 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 @echo ''
1332 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1333 @echo 'For further info see the ./README file'
1334
1335
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001336help-board-dirs := $(addprefix help-,$(board-dirs))
1337
1338help-boards: $(help-board-dirs)
1339
1340boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1341
1342$(help-board-dirs): help-%:
1343 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1344 @$(if $(boards-per-dir), \
1345 $(foreach b, $(boards-per-dir), \
1346 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1347 echo '')
1348
1349
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350# Documentation targets
1351# ---------------------------------------------------------------------------
1352%docs: scripts_basic FORCE
1353 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1354
1355else # KBUILD_EXTMOD
1356
1357###
1358# External module support.
1359# When building external modules the kernel used as basis is considered
1360# read-only, and no consistency checks are made and the make
1361# system is not used on the basis kernel. If updates are required
1362# in the basis kernel ordinary make commands (without M=...) must
1363# be used.
1364#
1365# The following are the only valid targets when building external
1366# modules.
1367# make M=dir clean Delete all automatically generated files
1368# make M=dir modules Make all modules in specified dir
1369# make M=dir Same as 'make M=dir modules'
1370# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001371# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372# Assumes install directory is already created
1373
1374# We are always building modules
1375KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001376PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001378 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379
Paul Smith4f193362006-03-05 17:14:10 -05001380PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381$(objtree)/Module.symvers:
1382 @test -e $(objtree)/Module.symvers || ( \
1383 echo; \
1384 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1385 echo " is missing; modules will have no dependencies and modversions."; \
1386 echo )
1387
1388module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001389PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390$(module-dirs): crmodverdir $(objtree)/Module.symvers
1391 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1392
1393modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001394 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001395 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Paul Smith4f193362006-03-05 17:14:10 -05001397PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001398modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001399
Paul Smith4f193362006-03-05 17:14:10 -05001400install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1401PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001402_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001403 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001404 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
Paul Smith4f193362006-03-05 17:14:10 -05001406PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001407_emodinst_post: _emodinst_
1408 $(call cmd,depmod)
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1411
Paul Smith4f193362006-03-05 17:14:10 -05001412PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413$(clean-dirs):
1414 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1415
1416clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001417clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1418 $(KBUILD_EXTMOD)/Module.markers \
1419 $(KBUILD_EXTMOD)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420clean: $(clean-dirs)
1421 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001422 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001424 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001425 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1426 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
1428help:
1429 @echo ' Building external modules.'
1430 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1431 @echo ''
1432 @echo ' modules - default target, build the module(s)'
1433 @echo ' modules_install - install the module'
1434 @echo ' clean - remove generated files in module directory only'
1435 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001436
1437# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001438PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001439prepare: ;
1440scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441endif # KBUILD_EXTMOD
1442
1443# Generate tags for editors
1444# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001445quiet_cmd_tags = GEN $@
1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Sam Ravnborga680eed2008-12-03 22:24:13 +01001448tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 $(call cmd,tags)
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451# Scripts to check various things for consistency
1452# ---------------------------------------------------------------------------
1453
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454includecheck:
1455 find * $(RCS_FIND_IGNORE) \
1456 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001457 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
1459versioncheck:
1460 find * $(RCS_FIND_IGNORE) \
1461 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001462 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464namespacecheck:
1465 $(PERL) $(srctree)/scripts/namespace.pl
1466
Adrian Bunk295ac052007-08-24 23:04:56 +02001467export_report:
1468 $(PERL) $(srctree)/scripts/export_report.pl
1469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470endif #ifeq ($(config-targets),1)
1471endif #ifeq ($(mixed-targets),1)
1472
Roman Zippelc30a02e2006-06-08 22:12:50 -07001473PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001474
Jeff Dike011e3a92006-12-13 00:34:12 -08001475# UML needs a little special treatment here. It wants to use the host
1476# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1477# else wants $(ARCH), including people doing cross-builds, which means
1478# that $(SUBARCH) doesn't work here.
1479ifeq ($(ARCH), um)
1480CHECKSTACK_ARCH := $(SUBARCH)
1481else
1482CHECKSTACK_ARCH := $(ARCH)
1483endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484checkstack:
1485 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001486 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487
1488kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001489 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1490 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001491kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001492 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Sam Ravnborg06300b22006-01-25 07:13:18 +01001494# Single targets
1495# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001496# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001497# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001498# - build with separate output dir 'make O=...'
1499# - external modules
1500#
1501# target-dir => where to store outputfile
1502# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503
Sam Ravnborg06300b22006-01-25 07:13:18 +01001504ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001505 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001506 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001507else
1508 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001509 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1510 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001511endif
1512
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001513%.s: %.c prepare scripts FORCE
1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1515%.i: %.c prepare scripts FORCE
1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1517%.o: %.c prepare scripts FORCE
1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1519%.lst: %.c prepare scripts FORCE
1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1521%.s: %.S prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1523%.o: %.S prepare scripts FORCE
1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001525%.symtypes: %.c prepare scripts FORCE
1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001527
1528# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001529/: prepare scripts FORCE
1530 $(cmd_crmodverdir)
1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1532 $(build)=$(build-dir)
1533%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001534 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001536 $(build)=$(build-dir)
1537%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001538 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001539 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001540 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001541 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001542
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543# FIXME Should go into a make.lib or something
1544# ===========================================================================
1545
1546quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1547 cmd_rmdirs = rm -rf $(rm-dirs)
1548
1549quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1550 cmd_rmfiles = rm -f $(rm-files)
1551
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001552# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001553quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1554 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001555 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001556 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001557 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001558 $(KERNELRELEASE); \
1559 fi
1560
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001561# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001562# clean it up only when building all modules
1563cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1564 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Sam Ravnborg222d3942007-10-15 21:59:31 +02001566a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001567 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001568 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569
1570quiet_cmd_as_o_S = AS $@
1571cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1572
1573# read all saved command lines
1574
1575targets := $(wildcard $(sort $(targets)))
1576cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1577
1578ifneq ($(cmd_files),)
1579 $(cmd_files): ; # Do not try to update included dependency files
1580 include $(cmd_files)
1581endif
1582
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1584# Usage:
1585# $(Q)$(MAKE) $(clean)=dir
1586clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588endif # skip-makefile
1589
Paul Smith4f193362006-03-05 17:14:10 -05001590PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001592
Paul Smith4f193362006-03-05 17:14:10 -05001593# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001594# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001595.PHONY: $(PHONY)