blob: 8fb9bfce212c14928b6074473672d7efb53827e1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds28d03252009-06-24 16:25:37 -07003SUBLEVEL = 31
4EXTRAVERSION = -rc1
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 \
Floris Kraaka8735822009-06-15 08:54:02 +0300347 -Werror-implicit-function-declaration \
348 -Wno-format-security
Sam Ravnborg222d3942007-10-15 21:59:31 +0200349KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700351# Read KERNELRELEASE from include/config/kernel.release (if it exists)
352KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100353KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100354
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200355export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100356export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200357export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
358export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Sam Ravnborg06c50402007-10-15 22:17:25 +0200360export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700361export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200362export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364# When compiling out-of-tree modules, put MODVERDIR in the module
365# tree rather than in the kernel tree. The kernel tree might
366# even be read-only.
367export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369# Files to ignore in find ... statements
370
Trond Myklebust406119f2005-10-27 14:46:53 -0400371RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
372export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374# ===========================================================================
375# Rules shared between *config targets and build targets
376
377# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500378PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379scripts_basic:
380 $(Q)$(MAKE) $(build)=scripts/basic
381
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200382# To avoid any implicit rule to kick in, define an empty command.
383scripts/basic/%: scripts_basic ;
384
Paul Smith4f193362006-03-05 17:14:10 -0500385PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200386# outputmakefile generates a Makefile in the output directory, if using a
387# separate output directory. This allows convenient use of make in the
388# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200390ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100391 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200392 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
393 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
394endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396# To make sure we do not include .config for any of the *config targets
397# catch them early, and hand them over to scripts/kconfig/Makefile
398# It is allowed to specify more targets when calling make, including
399# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200400# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401# Detect when mixed targets is specified, and make a second invocation
402# of make so .config is not included in this case either (for *config).
403
Roman Zippel3eb3c742007-01-10 14:45:28 +0100404no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700405 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100406 include/linux/version.h headers_% \
407 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409config-targets := 0
410mixed-targets := 0
411dot-config := 1
412
413ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 dot-config := 0
416 endif
417endif
418
419ifeq ($(KBUILD_EXTMOD),)
420 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
421 config-targets := 1
422 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
423 mixed-targets := 1
424 endif
425 endif
426endif
427
428ifeq ($(mixed-targets),1)
429# ===========================================================================
430# We're called with mixed targets (*config and build targets).
431# Handle them one by one.
432
433%:: FORCE
434 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
435
436else
437ifeq ($(config-targets),1)
438# ===========================================================================
439# *config targets only - make sure prerequisites are updated, and descend
440# in scripts/kconfig to make the *config target
441
442# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
443# KBUILD_DEFCONFIG may point out an alternative default configuration
444# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200445include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400446export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100448config: scripts_basic outputmakefile FORCE
449 $(Q)mkdir -p include/linux include/config
450 $(Q)$(MAKE) $(build)=scripts/kconfig $@
451
452%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700453 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 $(Q)$(MAKE) $(build)=scripts/kconfig $@
455
456else
457# ===========================================================================
458# Build targets only - this includes vmlinux, arch specific targets, clean
459# targets and others. In general all targets except *config targets.
460
461ifeq ($(KBUILD_EXTMOD),)
462# Additional helpers built in scripts/
463# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200464# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500465PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700466scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 $(Q)$(MAKE) $(build)=$(@)
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469# Objects we will link into vmlinux / subdirs we need to visit
470init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100471drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472net-y := net/
473libs-y := lib/
474core-y := usr/
475endif # KBUILD_EXTMOD
476
477ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200478# Read in config
479-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200481ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482# Read in dependencies to all Kconfig* files, make sure to run
483# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700484-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700487$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Roman Zippelc955cca2006-06-08 22:12:39 -0700489# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100490# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200491# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100492# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700493include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
495else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200496# external modules needs include/linux/autoconf.h and include/config/auto.conf
497# but do not care if they are up-to-date. Use auto.conf to trigger the test
498PHONY += include/config/auto.conf
499
500include/config/auto.conf:
501 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
502 echo; \
503 echo " ERROR: Kernel configuration is invalid."; \
504 echo " include/linux/autoconf.h or $@ are missing."; \
505 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
506 echo; \
507 /bin/false)
508
509endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511else
512# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700513include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200514endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516# The all: target is the default when no target is given on the
517# command line.
518# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200519# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520all: vmlinux
521
522ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200523KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200525KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526endif
527
Ralf Baechlebef5b542008-07-16 13:02:24 +0100528include $(srctree)/arch/$(SRCARCH)/Makefile
529
Mike Frysinger08f67462009-06-04 16:29:08 -0700530ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100531KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
532endif
533
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100534# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900535ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100536KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900537endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200540KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200542KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543endif
544
545ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200546KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200547KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548endif
549
Steven Rostedt606576c2008-10-06 19:06:12 -0400550ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200551KBUILD_CFLAGS += -pg
552endif
553
Sam Ravnborg91341d42008-01-21 21:31:44 +0100554# We trigger additional mismatches with less inlining
555ifdef CONFIG_DEBUG_SECTION_MISMATCH
556KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
557endif
558
Sam Ravnborge8e69932005-04-30 16:51:42 -0700559# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700560NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700561CHECKFLAGS += $(NOSTDINC_FLAGS)
562
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200564KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200566# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200567KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400569# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsd0115552009-03-19 15:53:19 -0700570KBUILD_CFLAGS += $(call cc-option,-fwrapv)
571
Kyle McMartin00308642009-03-23 15:25:49 -0400572# revert to pre-gcc-4.4 behaviour of .eh_frame
573KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
574
Sam Ravnborg06c50402007-10-15 22:17:25 +0200575# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100576# But warn user when we do so
577warn-assign = \
578$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
579
580ifneq ($(KCPPFLAGS),)
581 $(call warn-assign,CPPFLAGS)
582 KBUILD_CPPFLAGS += $(KCPPFLAGS)
583endif
584ifneq ($(KAFLAGS),)
585 $(call warn-assign,AFLAGS)
586 KBUILD_AFLAGS += $(KAFLAGS)
587endif
588ifneq ($(KCFLAGS),)
589 $(call warn-assign,CFLAGS)
590 KBUILD_CFLAGS += $(KCFLAGS)
591endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200592
Roland McGrath18991192007-07-19 01:48:40 -0700593# Use --build-id when available.
594LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
595 $(call ld-option, -Wl$(comma)--build-id,))
596LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
597LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
598
David Howells5d7d18f2009-03-04 11:59:07 -0800599ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
600LDFLAGS_vmlinux += -X
601endif
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200604# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605# set in the environment
606# Also any assignments in arch/$(ARCH)/Makefile take precedence over
607# this default value
608export KBUILD_IMAGE ?= vmlinux
609
610#
611# INSTALL_PATH specifies where to place the updated kernel and system map
612# images. Default is /boot, but you can set it to other values
613export INSTALL_PATH ?= /boot
614
615#
616# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
617# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200618# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619#
620
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100621MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622export MODLIB
623
Theodore Ts'oac031f22006-06-21 20:53:09 -0400624#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100625# INSTALL_MOD_STRIP, if defined, will cause modules to be
626# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
627# the default option --strip-debug will be used. Otherwise,
628# INSTALL_MOD_STRIP will used as the options to the strip command.
629
Theodore Ts'oac031f22006-06-21 20:53:09 -0400630ifdef INSTALL_MOD_STRIP
631ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100632mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400633else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100634mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400635endif # INSTALL_MOD_STRIP=1
636else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100637mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400638endif # INSTALL_MOD_STRIP
639export mod_strip_cmd
640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100643core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
645vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
646 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
647 $(net-y) $(net-m) $(libs-y) $(libs-m)))
648
649vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
650 $(init-n) $(init-) \
651 $(core-n) $(core-) $(drivers-n) $(drivers-) \
652 $(net-n) $(net-) $(libs-n) $(libs-))))
653
654init-y := $(patsubst %/, %/built-in.o, $(init-y))
655core-y := $(patsubst %/, %/built-in.o, $(core-y))
656drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
657net-y := $(patsubst %/, %/built-in.o, $(net-y))
658libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
659libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
660libs-y := $(libs-y1) $(libs-y2)
661
662# Build vmlinux
663# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200664# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200666# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667# Ordering when linking is important, and $(vmlinux-init) must be first.
668#
669# vmlinux
670# ^
671# |
672# +-< $(vmlinux-init)
673# | +--< init/version.o + more
674# |
675# +--< $(vmlinux-main)
676# | +--< driver/built-in.o mm/built-in.o + more
677# |
678# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
679#
680# vmlinux version (uname -v) cannot be updated during normal
681# descending-into-subdirs phase since we do not yet know if we need to
682# update vmlinux.
683# Therefore this step is delayed until just before final link of vmlinux -
684# except in the kallsyms case where it is done just before adding the
685# symbols to the kernel.
686#
687# System.map is generated to document addresses of all kernel symbols
688
689vmlinux-init := $(head-y) $(init-y)
690vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
691vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200692vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100693export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
695# Rule to link vmlinux - also used during CONFIG_KALLSYMS
696# May be overridden by arch/$(ARCH)/Makefile
697quiet_cmd_vmlinux__ ?= LD $@
698 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
699 -T $(vmlinux-lds) $(vmlinux-init) \
700 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200701 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703# Generate new vmlinux version
704quiet_cmd_vmlinux_version = GEN .version
705 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200706 if [ ! -r .version ]; then \
707 rm -f .version; \
708 echo 1 >.version; \
709 else \
710 mv .version .old_version; \
711 expr 0$$(cat .old_version) + 1 >.version; \
712 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 $(MAKE) $(build)=init
714
715# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200716quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
718
719# Link of vmlinux
720# If CONFIG_KALLSYMS is set .version is already updated
721# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700722# Use + in front of the vmlinux_version rule to silent warning with make -j2
723# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700725 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
727
728 $(call cmd,vmlinux__)
729 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
730
Sam Ravnborg46352812006-08-08 21:41:18 +0200731 $(Q)$(if $($(quiet)cmd_sysmap), \
732 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
733 $(cmd_sysmap) $@ System.map; \
734 if [ $$? -ne 0 ]; then \
735 rm -f $@; \
736 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 fi;
738 $(verify_kallsyms)
739endef
740
741
742ifdef CONFIG_KALLSYMS
743# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
744# It's a three stage process:
745# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
746# empty
747# Running kallsyms on that gives us .tmp_kallsyms1.o with
748# the right size - vmlinux version (uname -v) is updated during this step
749# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
750# but due to the added section, some addresses have shifted.
751# From here, we generate a correct .tmp_kallsyms2.o
752# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
753# o Verify that the System.map from vmlinux matches the map from
754# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
755# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
756# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
757# temporary bypass to allow the kernel to be built while the
758# maintainers work out what went wrong with kallsyms.
759
760ifdef CONFIG_KALLSYMS_EXTRA_PASS
761last_kallsyms := 3
762else
763last_kallsyms := 2
764endif
765
766kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
767
768define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200769 $(Q)$(if $($(quiet)cmd_sysmap), \
770 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200772 $(Q)cmp -s System.map .tmp_System.map || \
773 (echo Inconsistent kallsyms data; \
774 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 rm .tmp_kallsyms* ; /bin/false )
776endef
777
778# Update vmlinux version before link
779# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200780# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781cmd_ksym_ld = $(cmd_vmlinux__)
782define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200783 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 +$(call cmd,vmlinux_version)
785 $(call cmd,vmlinux__)
786 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
787endef
788
789# Generate .S file with all kernel symbols
790quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100791 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
792 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100794.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 $(call if_changed_dep,as_o_S)
796
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100797.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 $(call cmd,kallsyms)
799
800# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100801.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
802 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100804.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
805 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100807.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
808 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809
810# Needs to visit scripts/ before $(KALLSYMS) can be used.
811$(KALLSYMS): scripts ;
812
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000813# Generate some data for debugging strange kallsyms problems
814debug_kallsyms: .tmp_map$(last_kallsyms)
815
816.tmp_map%: .tmp_vmlinux% FORCE
817 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
818
819.tmp_map3: .tmp_map2
820
821.tmp_map2: .tmp_map1
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823endif # ifdef CONFIG_KALLSYMS
824
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200825# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
826# relevant sections renamed as per the linker script.
827quiet_cmd_vmlinux-modpost = LD $@
828 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
829 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200830 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200831define rule_vmlinux-modpost
832 :
833 +$(call cmd,vmlinux-modpost)
834 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
835 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
836endef
837
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100839vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700840ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100841 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700842endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700843ifdef CONFIG_SAMPLES
844 $(Q)$(MAKE) $(build)=samples
845endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700846ifdef CONFIG_BUILD_DOCSRC
847 $(Q)$(MAKE) $(build)=Documentation
848endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200849 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200851 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Sam Ravnborg310f8242008-01-21 22:57:09 +0100853# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100854ifdef CONFIG_KALLSYMS
855.tmp_vmlinux1: vmlinux.o
856endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200857
858modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
859vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200860 $(call if_changed_rule,vmlinux-modpost)
861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862# The actual objects are generated when descending,
863# make sure no implicit rule kicks in
864$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
865
866# Handle descending into subdirectories listed in $(vmlinux-dirs)
867# Preset locale variables to speed up the build process. Limit locale
868# tweaks to this spot to avoid wrong language settings when running
869# make menuconfig etc.
870# Error messages still appears in the original language
871
Paul Smith4f193362006-03-05 17:14:10 -0500872PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200873$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 $(Q)$(MAKE) $(build)=$@
875
Sam Ravnborgcb584552006-01-09 21:20:34 +0100876# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100877#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400878# The KERNELRELEASE value built here is stored in the file
879# include/config/kernel.release, and is used when executing several
880# make targets, such as "make install" or "make modules_install."
881#
882# The eventual kernel release string consists of the following fields,
883# shown in a hierarchical format to show how smaller parts are concatenated
884# to form the larger and final value, with values coming from places like
885# the Makefile, kernel config options, make command line options and/or
886# SCM tag information.
887#
888# $(KERNELVERSION)
889# $(VERSION) eg, 2
890# $(PATCHLEVEL) eg, 6
891# $(SUBLEVEL) eg, 18
892# $(EXTRAVERSION) eg, -rc6
893# $(localver-full)
894# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100895# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400896# $(CONFIG_LOCALVERSION) (from kernel config setting)
897# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
898# ./scripts/setlocalversion (SCM tag, if one exists)
899# $(LOCALVERSION) (from make command line if provided)
900#
901# Note how the final $(localver-auto) string is included *only* if the
902# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
903# moment, only git is supported but other SCMs can edit the script
904# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100905
Oleg Verych76c32952007-02-06 02:18:22 +0100906pattern = ".*/localversion[^~]*"
907string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800908 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100909
Oleg Verych76c32952007-02-06 02:18:22 +0100910localver = $(subst $(space),, $(string) \
911 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200912
Sam Ravnborgcb584552006-01-09 21:20:34 +0100913# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
914# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200915# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100916#
Josh Huntb925dbf2009-02-12 10:16:05 -0800917# .scmversion is used when generating rpm packages so we do not loose
918# the version information from the SCM when we do the build of the kernel
919# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100920ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800921
922ifeq ($(wildcard .scmversion),)
923 _localver-auto = $(shell $(CONFIG_SHELL) \
924 $(srctree)/scripts/setlocalversion $(srctree))
925else
926 _localver-auto = $(shell cat .scmversion 2> /dev/null)
927endif
928
Sam Ravnborgcb584552006-01-09 21:20:34 +0100929 localver-auto = $(LOCALVERSION)$(_localver-auto)
930endif
931
932localver-full = $(localver)$(localver-auto)
933
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700934# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100935kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700936include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100937 $(Q)rm -f $@
938 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100939
940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200942# or the modules are listed in "prepare".
943# A multi level approach is used. prepareN is processed before prepareN-1.
944# archprepare is used in arch Makefiles and when processed asm symlink,
945# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200947# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500948PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200949
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200950# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951# and if so do:
952# 1) Check that make has not been executed in the kernel src $(srctree)
953# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700954prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500956 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700957 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 echo " $(srctree) is not clean, please run 'make mrproper'";\
959 echo " in the '$(srctree)' directory.";\
960 /bin/false; \
961 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200962 $(Q)if [ ! -d include2 ]; then \
963 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200964 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200965 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966endif
967
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200968# prepare2 creates a makefile if using a separate output directory
969prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
Roman Zippel3eb3c742007-01-10 14:45:28 +0100971prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
972 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200973 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200975archprepare: prepare1 scripts_basic
976
977prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200978 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200979 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800982prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200984# Leave this as default for preprocessing vmlinux.lds.S, which is now
985# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
988
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200989# The asm symlink changes when $(ARCH) changes.
990# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200991# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200992define check-symlink
993 set -e; \
994 if [ -L include/asm ]; then \
995 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
996 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200997 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
998 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200999 exit 1; \
1000 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001001 test -e $$asmlink || rm include/asm; \
1002 elif [ -d include/asm ]; then \
1003 echo "ERROR: $@ is a directory but a symlink was expected";\
1004 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001005 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001006endef
1007
1008# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001009# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001010# directory for generated filesas used by some architectures.
1011define create-symlink
1012 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001013 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001014 if [ ! -d include/asm-$(SRCARCH) ]; then \
1015 mkdir -p include/asm-$(SRCARCH); \
1016 fi; \
1017 ln -fsn asm-$(SRCARCH) $@; \
1018 fi
1019endef
1020
1021include/asm: FORCE
1022 $(Q)$(check-symlink)
1023 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025# Generate some files
1026# ---------------------------------------------------------------------------
1027
1028# KERNELRELEASE can change from a few different places, meaning version.h
1029# needs to be updated, so this check is forced on all builds
1030
1031uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001032define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001034 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1035 exit 1; \
1036 fi; \
1037 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038endef
1039
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001040define filechk_version.h
1041 (echo \#define LINUX_VERSION_CODE $(shell \
1042 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1043 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1044endef
1045
1046include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 $(call filechk,version.h)
1048
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001049include/linux/utsrelease.h: include/config/kernel.release FORCE
1050 $(call filechk,utsrelease.h)
1051
Vegard Nossum179efcb2008-12-16 12:33:43 +01001052PHONY += headerdep
1053headerdep:
1054 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056# ---------------------------------------------------------------------------
1057
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059depend dep:
1060 @echo '*** Warning: make $@ is unnecessary now.'
1061
1062# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001063# Firmware install
1064INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1065export INSTALL_FW_PATH
1066
1067PHONY += firmware_install
1068firmware_install: FORCE
1069 @mkdir -p $(objtree)/firmware
1070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1071
1072# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001073# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001074
Sam Ravnborge6883b12008-06-05 16:43:46 +02001075#Default location for installed headers
1076export INSTALL_HDR_PATH = $(objtree)/usr
1077
Sam Ravnborge6883b12008-06-05 16:43:46 +02001078hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001079# Find out where the Kbuild file is located to support
1080# arch/$(ARCH)/include/asm
1081hdr-dir = $(strip \
1082 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1083 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1084
1085# If we do an all arch process set dst to asm-$(hdr-arch)
1086hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001087
1088PHONY += __headers
1089__headers: include/linux/version.h scripts_basic FORCE
1090 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001091
1092PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001093headers_install_all:
1094 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001095
David Woodhouse8d730cf2006-06-18 11:58:39 +01001096PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001097headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001098 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1099 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001100 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001101 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001102
Mike Frysinger1f857122007-02-14 00:33:02 -08001103PHONY += headers_check_all
1104headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001105 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001106
David Woodhouse68475352006-06-18 12:02:10 +01001107PHONY += headers_check
1108headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001109 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001110 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001111
David Woodhouse8d730cf2006-06-18 11:58:39 +01001112# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113# Modules
1114
1115ifdef CONFIG_MODULES
1116
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001117# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119all: modules
1120
1121# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001122#
1123# A module can be listed more than once in obj-m resulting in
1124# duplicate lines in modules.order files. Those are removed
1125# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Paul Smith4f193362006-03-05 17:14:10 -05001127PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001129 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001130 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134
1135# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001136PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001137modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138
1139# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001140PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141modules_install: _modinst_ _modinst_post
1142
Paul Smith4f193362006-03-05 17:14:10 -05001143PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001145 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 echo "Warning: you may need to install module-init-tools"; \
1147 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1148 sleep 1; \
1149 fi
1150 @rm -rf $(MODLIB)/kernel
1151 @rm -f $(MODLIB)/source
1152 @mkdir -p $(MODLIB)/kernel
1153 @ln -s $(srctree) $(MODLIB)/source
1154 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1155 rm -f $(MODLIB)/build ; \
1156 ln -s $(objtree) $(MODLIB)/build ; \
1157 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001158 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001159 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001161# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162# boot a modules.dep even before / is mounted read-write. However the
1163# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001164PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001166 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001167 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169else # CONFIG_MODULES
1170
1171# Modules not configured
1172# ---------------------------------------------------------------------------
1173
1174modules modules_install: FORCE
1175 @echo
1176 @echo "The present kernel configuration has modules disabled."
1177 @echo "Type 'make config' and enable loadable module support."
1178 @echo "Then build a kernel with module support enabled."
1179 @echo
1180 @exit 1
1181
1182endif # CONFIG_MODULES
1183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184###
1185# Cleaning is done on three levels.
1186# make clean Delete most generated files
1187# Leave enough to build external modules
1188# make mrproper Delete the current configuration, and all generated files
1189# make distclean Remove editor backup files, patch leftover files and the like
1190
1191# Directories & files removed with 'make clean'
1192CLEAN_DIRS += $(MODVERDIR)
1193CLEAN_FILES += vmlinux System.map \
1194 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1195
1196# Directories & files removed with 'make mrproper'
Sam Ravnborgf14875a2009-04-18 23:51:08 +02001197MRPROPER_DIRS += include/config include2 usr/include include/generated
Tore Anderson50aa88e2006-01-07 15:34:40 +01001198MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001199 include/linux/autoconf.h include/linux/version.h \
1200 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001201 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001202 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
1204# clean - Delete most, but leave enough to build external modules
1205#
1206clean: rm-dirs := $(CLEAN_DIRS)
1207clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001208clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Paul Smith4f193362006-03-05 17:14:10 -05001210PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211$(clean-dirs):
1212 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1213
1214clean: archclean $(clean-dirs)
1215 $(call cmd,rmdirs)
1216 $(call cmd,rmfiles)
1217 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001218 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001219 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001220 -o -name '*.symtypes' -o -name 'modules.order' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001221 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1222 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224# mrproper - Delete all generated files, including .config
1225#
1226mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1227mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1228mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1229
Paul Smith4f193362006-03-05 17:14:10 -05001230PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231$(mrproper-dirs):
1232 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1233
1234mrproper: clean archmrproper $(mrproper-dirs)
1235 $(call cmd,rmdirs)
1236 $(call cmd,rmfiles)
1237
1238# distclean
1239#
Paul Smith4f193362006-03-05 17:14:10 -05001240PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
1242distclean: mrproper
1243 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001244 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001246 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1248 -type f -print | xargs rm -f
1249
1250
1251# Packaging of the kernel to various formats
1252# ---------------------------------------------------------------------------
1253# rpm target kept for backward compatibility
1254package-dir := $(srctree)/scripts/package
1255
Zach Brown031ecc62006-06-08 22:12:37 -07001256%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001257 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001258rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001259 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261
1262# Brief documentation of the typical targets used
1263# ---------------------------------------------------------------------------
1264
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001265boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001267board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1268board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270help:
1271 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001272 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001273 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001274 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001275 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 @echo ''
1277 @echo 'Configuration targets:'
1278 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1279 @echo ''
1280 @echo 'Other generic targets:'
1281 @echo ' all - Build all targets marked with [*]'
1282 @echo '* vmlinux - Build the bare kernel'
1283 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001284 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001285 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1286 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 @echo ' dir/ - Build all files in dir and below'
1288 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001289 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001290 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 @echo ' tags/TAGS - Generate tags file for editors'
1292 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001293 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001294 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001295 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001296 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001297 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 @echo ' checkstack - Generate a list of stack hogs'
1300 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001301 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001302 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001303 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001304 @echo ' headers_check - Sanity check on exported headers'
1305 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001306 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001308 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 @echo ''
1310 @echo 'Documentation targets:'
1311 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1312 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001313 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001315 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 @echo ''
1317 @$(if $(boards), \
1318 $(foreach b, $(boards), \
1319 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1320 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001321 @$(if $(board-dirs), \
1322 $(foreach b, $(board-dirs), \
1323 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1324 printf " %-16s - Show all of the above\\n" help-boards; \
1325 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
1327 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001328 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001330 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1331 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 @echo ''
1333 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1334 @echo 'For further info see the ./README file'
1335
1336
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001337help-board-dirs := $(addprefix help-,$(board-dirs))
1338
1339help-boards: $(help-board-dirs)
1340
1341boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1342
1343$(help-board-dirs): help-%:
1344 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1345 @$(if $(boards-per-dir), \
1346 $(foreach b, $(boards-per-dir), \
1347 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1348 echo '')
1349
1350
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351# Documentation targets
1352# ---------------------------------------------------------------------------
1353%docs: scripts_basic FORCE
1354 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1355
1356else # KBUILD_EXTMOD
1357
1358###
1359# External module support.
1360# When building external modules the kernel used as basis is considered
1361# read-only, and no consistency checks are made and the make
1362# system is not used on the basis kernel. If updates are required
1363# in the basis kernel ordinary make commands (without M=...) must
1364# be used.
1365#
1366# The following are the only valid targets when building external
1367# modules.
1368# make M=dir clean Delete all automatically generated files
1369# make M=dir modules Make all modules in specified dir
1370# make M=dir Same as 'make M=dir modules'
1371# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001372# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373# Assumes install directory is already created
1374
1375# We are always building modules
1376KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001377PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001379 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380
Paul Smith4f193362006-03-05 17:14:10 -05001381PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382$(objtree)/Module.symvers:
1383 @test -e $(objtree)/Module.symvers || ( \
1384 echo; \
1385 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1386 echo " is missing; modules will have no dependencies and modversions."; \
1387 echo )
1388
1389module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001390PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391$(module-dirs): crmodverdir $(objtree)/Module.symvers
1392 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1393
1394modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001395 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001396 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Paul Smith4f193362006-03-05 17:14:10 -05001398PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001399modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001400
Paul Smith4f193362006-03-05 17:14:10 -05001401install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1402PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001403_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001404 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001405 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
Paul Smith4f193362006-03-05 17:14:10 -05001407PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001408_emodinst_post: _emodinst_
1409 $(call cmd,depmod)
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1412
Paul Smith4f193362006-03-05 17:14:10 -05001413PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414$(clean-dirs):
1415 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1416
1417clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001418clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1419 $(KBUILD_EXTMOD)/Module.markers \
1420 $(KBUILD_EXTMOD)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421clean: $(clean-dirs)
1422 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001423 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001425 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001426 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1427 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
1429help:
1430 @echo ' Building external modules.'
1431 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1432 @echo ''
1433 @echo ' modules - default target, build the module(s)'
1434 @echo ' modules_install - install the module'
1435 @echo ' clean - remove generated files in module directory only'
1436 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001437
1438# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001439PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001440prepare: ;
1441scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442endif # KBUILD_EXTMOD
1443
1444# Generate tags for editors
1445# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001446quiet_cmd_tags = GEN $@
1447 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
Sam Ravnborga680eed2008-12-03 22:24:13 +01001449tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 $(call cmd,tags)
1451
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452# Scripts to check various things for consistency
1453# ---------------------------------------------------------------------------
1454
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455includecheck:
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001458 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
1460versioncheck:
1461 find * $(RCS_FIND_IGNORE) \
1462 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001463 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465namespacecheck:
1466 $(PERL) $(srctree)/scripts/namespace.pl
1467
Adrian Bunk295ac052007-08-24 23:04:56 +02001468export_report:
1469 $(PERL) $(srctree)/scripts/export_report.pl
1470
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471endif #ifeq ($(config-targets),1)
1472endif #ifeq ($(mixed-targets),1)
1473
Roman Zippelc30a02e2006-06-08 22:12:50 -07001474PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001475
Jeff Dike011e3a92006-12-13 00:34:12 -08001476# UML needs a little special treatment here. It wants to use the host
1477# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1478# else wants $(ARCH), including people doing cross-builds, which means
1479# that $(SUBARCH) doesn't work here.
1480ifeq ($(ARCH), um)
1481CHECKSTACK_ARCH := $(SUBARCH)
1482else
1483CHECKSTACK_ARCH := $(ARCH)
1484endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485checkstack:
1486 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001487 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
1489kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001490 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1491 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001492kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001493 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
Sam Ravnborg06300b22006-01-25 07:13:18 +01001495# Single targets
1496# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001497# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001498# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001499# - build with separate output dir 'make O=...'
1500# - external modules
1501#
1502# target-dir => where to store outputfile
1503# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001504
Sam Ravnborg06300b22006-01-25 07:13:18 +01001505ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001506 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001507 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001508else
1509 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001510 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1511 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001512endif
1513
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001514%.s: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516%.i: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518%.o: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520%.lst: %.c prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522%.s: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1524%.o: %.S prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001526%.symtypes: %.c prepare scripts FORCE
1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001528
1529# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001530/: prepare scripts FORCE
1531 $(cmd_crmodverdir)
1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1533 $(build)=$(build-dir)
1534%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001535 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001536 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001537 $(build)=$(build-dir)
1538%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001539 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001540 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001541 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001542 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544# FIXME Should go into a make.lib or something
1545# ===========================================================================
1546
1547quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1548 cmd_rmdirs = rm -rf $(rm-dirs)
1549
1550quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1551 cmd_rmfiles = rm -f $(rm-files)
1552
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001553# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001554quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1555 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001556 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001557 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001558 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001559 $(KERNELRELEASE); \
1560 fi
1561
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001562# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001563# clean it up only when building all modules
1564cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1565 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
Sam Ravnborg222d3942007-10-15 21:59:31 +02001567a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001568 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001569 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
1571quiet_cmd_as_o_S = AS $@
1572cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1573
1574# read all saved command lines
1575
1576targets := $(wildcard $(sort $(targets)))
1577cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1578
1579ifneq ($(cmd_files),)
1580 $(cmd_files): ; # Do not try to update included dependency files
1581 include $(cmd_files)
1582endif
1583
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1585# Usage:
1586# $(Q)$(MAKE) $(clean)=dir
1587clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1588
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589endif # skip-makefile
1590
Paul Smith4f193362006-03-05 17:14:10 -05001591PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001593
Paul Smith4f193362006-03-05 17:14:10 -05001594# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001595# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001596.PHONY: $(PHONY)