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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc5976502009-01-10 15:43:05 -08003SUBLEVEL = 29
Linus Torvalds8e0ee432009-03-23 16:12:14 -07004EXTRAVERSION =
5NAME = Temporary Tasmanian Devil
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040047# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114ifneq ($(KBUILD_OUTPUT),)
115# Invoke a second make in the output directory, passing relevant variables
116# check that the output directory actually exists
117saved-output := $(KBUILD_OUTPUT)
118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119$(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Milton Miller0b357862007-09-21 18:09:02 -0500122PHONY += $(MAKECMDGOALS) sub-make
123
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500125 $(Q)@:
126
127sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133# Leave processing to above invocation of make
134skip-makefile := 1
135endif # ifneq ($(KBUILD_OUTPUT),)
136endif # ifeq ($(KBUILD_SRC),)
137
138# We process the rest of the Makefile if this is the final invocation of make
139ifeq ($(skip-makefile),)
140
141# If building an external module we do not care about the all: rule
142# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500143PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144ifeq ($(KBUILD_EXTMOD),)
145_all: all
146else
147_all: modules
148endif
149
150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151TOPDIR := $(srctree)
152# FIXME - TOPDIR is obsolete, use srctree/objtree
153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159export srctree objtree VPATH TOPDIR
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt12760cb2007-11-23 14:24:25 +0900172 -e s/sh.*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100192export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200197UTS_MACHINE := $(ARCH)
198SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Sam Ravnborgd746d642007-11-12 20:14:19 +0100200# Additional ARCH settings for x86
201ifeq ($(ARCH),i386)
202 SRCARCH := x86
203endif
204ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200207
Sam Ravnborg5e538792008-12-02 23:17:12 -0800208# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200209ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200211endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200212
Sam Ravnborg5e538792008-12-02 23:17:12 -0800213# Where to locate arch specific headers
214hdr-arch := $(SRCARCH)
215
Sam Ravnborg49148022009-01-16 21:58:10 +1000216ifeq ($(ARCH),m68knommu)
217 hdr-arch := m68k
218endif
219
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700220KCONFIG_CONFIG ?= .config
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222# SHELL used by kbuild
223CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
224 else if [ -x /bin/bash ]; then echo /bin/bash; \
225 else echo sh; fi ; fi)
226
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200227HOSTCC = gcc
228HOSTCXX = g++
229HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
230HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200232# Decide whether to build built-in, modular, or both.
233# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235KBUILD_MODULES :=
236KBUILD_BUILTIN := 1
237
238# If we have only "make modules", don't compile built-in objects.
239# When we're building modules with modversions, we need to consider
240# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200241# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243ifeq ($(MAKECMDGOALS),modules)
244 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
245endif
246
247# If we have "make <whatever> modules", compile modules
248# in addition to whatever we do anyway.
249# Just "make" or "make all" shall build modules as well
250
251ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
252 KBUILD_MODULES := 1
253endif
254
255ifeq ($(MAKECMDGOALS),)
256 KBUILD_MODULES := 1
257endif
258
Sam Ravnborge579d352005-07-27 08:10:10 +0200259export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
261
262# Beautify output
263# ---------------------------------------------------------------------------
264#
265# Normally, we echo the whole command before executing it. By making
266# that echo $($(quiet)$(cmd)), we now have the possibility to set
267# $(quiet) to choose other forms of output instead, e.g.
268#
269# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
270# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
271#
272# If $(quiet) is empty, the whole command will be printed.
273# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200274# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275# the variable $(silent_cmd_cc_o_c) doesn't exist.
276#
Adrian Bunka58a4142006-01-10 00:08:17 +0100277# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278# for commands that shall be hidden in non-verbose mode.
279#
280# $(Q)ln $@ :<
281#
282# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
283# If KBUILD_VERBOSE equals 1 then the above command is displayed.
284
285ifeq ($(KBUILD_VERBOSE),1)
286 quiet =
287 Q =
288else
289 quiet=quiet_
290 Q = @
291endif
292
293# If the user is running make -s (silent mode), suppress echoing of
294# commands
295
296ifneq ($(findstring s,$(MAKEFLAGS)),)
297 quiet=silent_
298endif
299
300export quiet Q KBUILD_VERBOSE
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
303# Look for make include files relative to root of kernel src
304MAKEFLAGS += --include-dir=$(srctree)
305
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100306# We need some generic definitions (do not try to remake the file).
307$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800308include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310# Make variables (CC, etc...)
311
312AS = $(CROSS_COMPILE)as
313LD = $(CROSS_COMPILE)ld
314CC = $(CROSS_COMPILE)gcc
315CPP = $(CC) -E
316AR = $(CROSS_COMPILE)ar
317NM = $(CROSS_COMPILE)nm
318STRIP = $(CROSS_COMPILE)strip
319OBJCOPY = $(CROSS_COMPILE)objcopy
320OBJDUMP = $(CROSS_COMPILE)objdump
321AWK = awk
322GENKSYMS = scripts/genksyms/genksyms
323DEPMOD = /sbin/depmod
324KALLSYMS = scripts/kallsyms
325PERL = perl
326CHECK = sparse
327
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100328CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
329 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330MODFLAGS = -DMODULE
331CFLAGS_MODULE = $(MODFLAGS)
332AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700333LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334CFLAGS_KERNEL =
335AFLAGS_KERNEL =
336
337
338# Use LINUXINCLUDE when you must reference the include/ directory.
339# Needed to be compatible with the O= option
340LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100341 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200342 -I$(srctree)/arch/$(hdr-arch)/include \
343 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100345KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200347KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700348 -fno-strict-aliasing -fno-common \
349 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200350KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700352# Read KERNELRELEASE from include/config/kernel.release (if it exists)
353KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100354KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100355
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200356export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100357export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200358export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Sam Ravnborg06c50402007-10-15 22:17:25 +0200361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200363export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365# When compiling out-of-tree modules, put MODVERDIR in the module
366# tree rather than in the kernel tree. The kernel tree might
367# even be read-only.
368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370# Files to ignore in find ... statements
371
Trond Myklebust406119f2005-10-27 14:46:53 -0400372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375# ===========================================================================
376# Rules shared between *config targets and build targets
377
378# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500379PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380scripts_basic:
381 $(Q)$(MAKE) $(build)=scripts/basic
382
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200383# To avoid any implicit rule to kick in, define an empty command.
384scripts/basic/%: scripts_basic ;
385
Paul Smith4f193362006-03-05 17:14:10 -0500386PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200387# outputmakefile generates a Makefile in the output directory, if using a
388# separate output directory. This allows convenient use of make in the
389# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200391ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100392 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
395endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397# To make sure we do not include .config for any of the *config targets
398# catch them early, and hand them over to scripts/kconfig/Makefile
399# It is allowed to specify more targets when calling make, including
400# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200401# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402# Detect when mixed targets is specified, and make a second invocation
403# of make so .config is not included in this case either (for *config).
404
Roman Zippel3eb3c742007-01-10 14:45:28 +0100405no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700406 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100407 include/linux/version.h headers_% \
408 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410config-targets := 0
411mixed-targets := 0
412dot-config := 1
413
414ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
416 dot-config := 0
417 endif
418endif
419
420ifeq ($(KBUILD_EXTMOD),)
421 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
422 config-targets := 1
423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
424 mixed-targets := 1
425 endif
426 endif
427endif
428
429ifeq ($(mixed-targets),1)
430# ===========================================================================
431# We're called with mixed targets (*config and build targets).
432# Handle them one by one.
433
434%:: FORCE
435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
436
437else
438ifeq ($(config-targets),1)
439# ===========================================================================
440# *config targets only - make sure prerequisites are updated, and descend
441# in scripts/kconfig to make the *config target
442
443# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
444# KBUILD_DEFCONFIG may point out an alternative default configuration
445# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200446include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400447export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100449config: scripts_basic outputmakefile FORCE
450 $(Q)mkdir -p include/linux include/config
451 $(Q)$(MAKE) $(build)=scripts/kconfig $@
452
453%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700454 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 $(Q)$(MAKE) $(build)=scripts/kconfig $@
456
457else
458# ===========================================================================
459# Build targets only - this includes vmlinux, arch specific targets, clean
460# targets and others. In general all targets except *config targets.
461
462ifeq ($(KBUILD_EXTMOD),)
463# Additional helpers built in scripts/
464# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200465# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500466PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700467scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 $(Q)$(MAKE) $(build)=$(@)
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470# Objects we will link into vmlinux / subdirs we need to visit
471init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100472drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473net-y := net/
474libs-y := lib/
475core-y := usr/
476endif # KBUILD_EXTMOD
477
478ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200479# Read in config
480-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200482ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483# Read in dependencies to all Kconfig* files, make sure to run
484# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700485-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700488$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Roman Zippelc955cca2006-06-08 22:12:39 -0700490# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100491# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200492# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100493# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700494include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
496else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200497# external modules needs include/linux/autoconf.h and include/config/auto.conf
498# but do not care if they are up-to-date. Use auto.conf to trigger the test
499PHONY += include/config/auto.conf
500
501include/config/auto.conf:
502 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
503 echo; \
504 echo " ERROR: Kernel configuration is invalid."; \
505 echo " include/linux/autoconf.h or $@ are missing."; \
506 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
507 echo; \
508 /bin/false)
509
510endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512else
513# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700514include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200515endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
517# The all: target is the default when no target is given on the
518# command line.
519# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200520# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521all: vmlinux
522
523ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200524KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200526KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527endif
528
Ralf Baechlebef5b542008-07-16 13:02:24 +0100529include $(srctree)/arch/$(SRCARCH)/Makefile
530
Andi Kleen35bb5b12008-02-22 15:15:03 +0100531ifneq (CONFIG_FRAME_WARN,0)
532KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
533endif
534
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100535# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900536ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100537KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900538endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200541KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200543KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544endif
545
546ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200547KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200548KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549endif
550
Steven Rostedt606576c2008-10-06 19:06:12 -0400551ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200552KBUILD_CFLAGS += -pg
553endif
554
Sam Ravnborg91341d42008-01-21 21:31:44 +0100555# We trigger additional mismatches with less inlining
556ifdef CONFIG_DEBUG_SECTION_MISMATCH
557KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
558endif
559
Sam Ravnborge8e69932005-04-30 16:51:42 -0700560# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700561NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700562CHECKFLAGS += $(NOSTDINC_FLAGS)
563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200565KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200567# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200568KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Linus Torvaldsd0115552009-03-19 15:53:19 -0700570# disable invalid "can't wrap" optimzations for signed / pointers
571KBUILD_CFLAGS += $(call cc-option,-fwrapv)
572
Kyle McMartin00308642009-03-23 15:25:49 -0400573# revert to pre-gcc-4.4 behaviour of .eh_frame
574KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
575
Sam Ravnborg06c50402007-10-15 22:17:25 +0200576# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100577# But warn user when we do so
578warn-assign = \
579$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
580
581ifneq ($(KCPPFLAGS),)
582 $(call warn-assign,CPPFLAGS)
583 KBUILD_CPPFLAGS += $(KCPPFLAGS)
584endif
585ifneq ($(KAFLAGS),)
586 $(call warn-assign,AFLAGS)
587 KBUILD_AFLAGS += $(KAFLAGS)
588endif
589ifneq ($(KCFLAGS),)
590 $(call warn-assign,CFLAGS)
591 KBUILD_CFLAGS += $(KCFLAGS)
592endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200593
Roland McGrath18991192007-07-19 01:48:40 -0700594# Use --build-id when available.
595LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
596 $(call ld-option, -Wl$(comma)--build-id,))
597LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
598LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200601# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602# set in the environment
603# Also any assignments in arch/$(ARCH)/Makefile take precedence over
604# this default value
605export KBUILD_IMAGE ?= vmlinux
606
607#
608# INSTALL_PATH specifies where to place the updated kernel and system map
609# images. Default is /boot, but you can set it to other values
610export INSTALL_PATH ?= /boot
611
612#
613# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
614# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200615# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616#
617
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100618MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619export MODLIB
620
Theodore Ts'oac031f22006-06-21 20:53:09 -0400621#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100622# INSTALL_MOD_STRIP, if defined, will cause modules to be
623# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
624# the default option --strip-debug will be used. Otherwise,
625# INSTALL_MOD_STRIP will used as the options to the strip command.
626
Theodore Ts'oac031f22006-06-21 20:53:09 -0400627ifdef INSTALL_MOD_STRIP
628ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100629mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400630else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100631mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400632endif # INSTALL_MOD_STRIP=1
633else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100634mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400635endif # INSTALL_MOD_STRIP
636export mod_strip_cmd
637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100640core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
643 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
644 $(net-y) $(net-m) $(libs-y) $(libs-m)))
645
646vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
647 $(init-n) $(init-) \
648 $(core-n) $(core-) $(drivers-n) $(drivers-) \
649 $(net-n) $(net-) $(libs-n) $(libs-))))
650
651init-y := $(patsubst %/, %/built-in.o, $(init-y))
652core-y := $(patsubst %/, %/built-in.o, $(core-y))
653drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
654net-y := $(patsubst %/, %/built-in.o, $(net-y))
655libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
656libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
657libs-y := $(libs-y1) $(libs-y2)
658
659# Build vmlinux
660# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200661# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200663# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664# Ordering when linking is important, and $(vmlinux-init) must be first.
665#
666# vmlinux
667# ^
668# |
669# +-< $(vmlinux-init)
670# | +--< init/version.o + more
671# |
672# +--< $(vmlinux-main)
673# | +--< driver/built-in.o mm/built-in.o + more
674# |
675# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
676#
677# vmlinux version (uname -v) cannot be updated during normal
678# descending-into-subdirs phase since we do not yet know if we need to
679# update vmlinux.
680# Therefore this step is delayed until just before final link of vmlinux -
681# except in the kallsyms case where it is done just before adding the
682# symbols to the kernel.
683#
684# System.map is generated to document addresses of all kernel symbols
685
686vmlinux-init := $(head-y) $(init-y)
687vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
688vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200689vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100690export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
692# Rule to link vmlinux - also used during CONFIG_KALLSYMS
693# May be overridden by arch/$(ARCH)/Makefile
694quiet_cmd_vmlinux__ ?= LD $@
695 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
696 -T $(vmlinux-lds) $(vmlinux-init) \
697 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200698 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700# Generate new vmlinux version
701quiet_cmd_vmlinux_version = GEN .version
702 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200703 if [ ! -r .version ]; then \
704 rm -f .version; \
705 echo 1 >.version; \
706 else \
707 mv .version .old_version; \
708 expr 0$$(cat .old_version) + 1 >.version; \
709 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 $(MAKE) $(build)=init
711
712# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200713quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
715
716# Link of vmlinux
717# If CONFIG_KALLSYMS is set .version is already updated
718# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700719# Use + in front of the vmlinux_version rule to silent warning with make -j2
720# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700722 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
724
725 $(call cmd,vmlinux__)
726 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
727
Sam Ravnborg46352812006-08-08 21:41:18 +0200728 $(Q)$(if $($(quiet)cmd_sysmap), \
729 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
730 $(cmd_sysmap) $@ System.map; \
731 if [ $$? -ne 0 ]; then \
732 rm -f $@; \
733 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 fi;
735 $(verify_kallsyms)
736endef
737
738
739ifdef CONFIG_KALLSYMS
740# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
741# It's a three stage process:
742# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
743# empty
744# Running kallsyms on that gives us .tmp_kallsyms1.o with
745# the right size - vmlinux version (uname -v) is updated during this step
746# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
747# but due to the added section, some addresses have shifted.
748# From here, we generate a correct .tmp_kallsyms2.o
749# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
750# o Verify that the System.map from vmlinux matches the map from
751# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
752# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
753# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
754# temporary bypass to allow the kernel to be built while the
755# maintainers work out what went wrong with kallsyms.
756
757ifdef CONFIG_KALLSYMS_EXTRA_PASS
758last_kallsyms := 3
759else
760last_kallsyms := 2
761endif
762
763kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
764
765define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200766 $(Q)$(if $($(quiet)cmd_sysmap), \
767 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200769 $(Q)cmp -s System.map .tmp_System.map || \
770 (echo Inconsistent kallsyms data; \
771 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 rm .tmp_kallsyms* ; /bin/false )
773endef
774
775# Update vmlinux version before link
776# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200777# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778cmd_ksym_ld = $(cmd_vmlinux__)
779define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200780 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 +$(call cmd,vmlinux_version)
782 $(call cmd,vmlinux__)
783 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
784endef
785
786# Generate .S file with all kernel symbols
787quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100788 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
789 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100791.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 $(call if_changed_dep,as_o_S)
793
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100794.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 $(call cmd,kallsyms)
796
797# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100798.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
799 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100801.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
802 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100804.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
805 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
807# Needs to visit scripts/ before $(KALLSYMS) can be used.
808$(KALLSYMS): scripts ;
809
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000810# Generate some data for debugging strange kallsyms problems
811debug_kallsyms: .tmp_map$(last_kallsyms)
812
813.tmp_map%: .tmp_vmlinux% FORCE
814 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
815
816.tmp_map3: .tmp_map2
817
818.tmp_map2: .tmp_map1
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820endif # ifdef CONFIG_KALLSYMS
821
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200822# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
823# relevant sections renamed as per the linker script.
824quiet_cmd_vmlinux-modpost = LD $@
825 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
826 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200827 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200828define rule_vmlinux-modpost
829 :
830 +$(call cmd,vmlinux-modpost)
831 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
832 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
833endef
834
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100836vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700837ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100838 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700839endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700840ifdef CONFIG_SAMPLES
841 $(Q)$(MAKE) $(build)=samples
842endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700843ifdef CONFIG_BUILD_DOCSRC
844 $(Q)$(MAKE) $(build)=Documentation
845endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200846 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200848 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Sam Ravnborg310f8242008-01-21 22:57:09 +0100850# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100851ifdef CONFIG_KALLSYMS
852.tmp_vmlinux1: vmlinux.o
853endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200854
855modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
856vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200857 $(call if_changed_rule,vmlinux-modpost)
858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859# The actual objects are generated when descending,
860# make sure no implicit rule kicks in
861$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
862
863# Handle descending into subdirectories listed in $(vmlinux-dirs)
864# Preset locale variables to speed up the build process. Limit locale
865# tweaks to this spot to avoid wrong language settings when running
866# make menuconfig etc.
867# Error messages still appears in the original language
868
Paul Smith4f193362006-03-05 17:14:10 -0500869PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200870$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 $(Q)$(MAKE) $(build)=$@
872
Sam Ravnborgcb584552006-01-09 21:20:34 +0100873# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100874#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400875# The KERNELRELEASE value built here is stored in the file
876# include/config/kernel.release, and is used when executing several
877# make targets, such as "make install" or "make modules_install."
878#
879# The eventual kernel release string consists of the following fields,
880# shown in a hierarchical format to show how smaller parts are concatenated
881# to form the larger and final value, with values coming from places like
882# the Makefile, kernel config options, make command line options and/or
883# SCM tag information.
884#
885# $(KERNELVERSION)
886# $(VERSION) eg, 2
887# $(PATCHLEVEL) eg, 6
888# $(SUBLEVEL) eg, 18
889# $(EXTRAVERSION) eg, -rc6
890# $(localver-full)
891# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100892# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400893# $(CONFIG_LOCALVERSION) (from kernel config setting)
894# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
895# ./scripts/setlocalversion (SCM tag, if one exists)
896# $(LOCALVERSION) (from make command line if provided)
897#
898# Note how the final $(localver-auto) string is included *only* if the
899# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
900# moment, only git is supported but other SCMs can edit the script
901# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100902
Oleg Verych76c32952007-02-06 02:18:22 +0100903pattern = ".*/localversion[^~]*"
904string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800905 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100906
Oleg Verych76c32952007-02-06 02:18:22 +0100907localver = $(subst $(space),, $(string) \
908 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200909
Sam Ravnborgcb584552006-01-09 21:20:34 +0100910# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
911# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200912# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100913#
Josh Huntb925dbf2009-02-12 10:16:05 -0800914# .scmversion is used when generating rpm packages so we do not loose
915# the version information from the SCM when we do the build of the kernel
916# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100917ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800918
919ifeq ($(wildcard .scmversion),)
920 _localver-auto = $(shell $(CONFIG_SHELL) \
921 $(srctree)/scripts/setlocalversion $(srctree))
922else
923 _localver-auto = $(shell cat .scmversion 2> /dev/null)
924endif
925
Sam Ravnborgcb584552006-01-09 21:20:34 +0100926 localver-auto = $(LOCALVERSION)$(_localver-auto)
927endif
928
929localver-full = $(localver)$(localver-auto)
930
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700931# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100932kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700933include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100934 $(Q)rm -f $@
935 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100936
937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200939# or the modules are listed in "prepare".
940# A multi level approach is used. prepareN is processed before prepareN-1.
941# archprepare is used in arch Makefiles and when processed asm symlink,
942# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200944# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500945PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200946
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200947# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948# and if so do:
949# 1) Check that make has not been executed in the kernel src $(srctree)
950# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700951prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500953 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700954 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 echo " $(srctree) is not clean, please run 'make mrproper'";\
956 echo " in the '$(srctree)' directory.";\
957 /bin/false; \
958 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200959 $(Q)if [ ! -d include2 ]; then \
960 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200961 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200962 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963endif
964
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200965# prepare2 creates a makefile if using a separate output directory
966prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967
Roman Zippel3eb3c742007-01-10 14:45:28 +0100968prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
969 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200970 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200972archprepare: prepare1 scripts_basic
973
974prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200975 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200976 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200977
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800979prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200981# Leave this as default for preprocessing vmlinux.lds.S, which is now
982# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
985
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200986# The asm symlink changes when $(ARCH) changes.
987# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200988# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200989define check-symlink
990 set -e; \
991 if [ -L include/asm ]; then \
992 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
993 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200994 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
995 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200996 exit 1; \
997 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200998 test -e $$asmlink || rm include/asm; \
999 elif [ -d include/asm ]; then \
1000 echo "ERROR: $@ is a directory but a symlink was expected";\
1001 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001002 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001003endef
1004
1005# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001006# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001007# directory for generated filesas used by some architectures.
1008define create-symlink
1009 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001010 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001011 if [ ! -d include/asm-$(SRCARCH) ]; then \
1012 mkdir -p include/asm-$(SRCARCH); \
1013 fi; \
1014 ln -fsn asm-$(SRCARCH) $@; \
1015 fi
1016endef
1017
1018include/asm: FORCE
1019 $(Q)$(check-symlink)
1020 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022# Generate some files
1023# ---------------------------------------------------------------------------
1024
1025# KERNELRELEASE can change from a few different places, meaning version.h
1026# needs to be updated, so this check is forced on all builds
1027
1028uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001029define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001031 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1032 exit 1; \
1033 fi; \
1034 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035endef
1036
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001037define filechk_version.h
1038 (echo \#define LINUX_VERSION_CODE $(shell \
1039 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1040 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1041endef
1042
1043include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 $(call filechk,version.h)
1045
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001046include/linux/utsrelease.h: include/config/kernel.release FORCE
1047 $(call filechk,utsrelease.h)
1048
Vegard Nossum179efcb2008-12-16 12:33:43 +01001049PHONY += headerdep
1050headerdep:
1051 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1052
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053# ---------------------------------------------------------------------------
1054
Paul Smith4f193362006-03-05 17:14:10 -05001055PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056depend dep:
1057 @echo '*** Warning: make $@ is unnecessary now.'
1058
1059# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001060# Firmware install
1061INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1062export INSTALL_FW_PATH
1063
1064PHONY += firmware_install
1065firmware_install: FORCE
1066 @mkdir -p $(objtree)/firmware
1067 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1068
1069# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001070# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001071
Sam Ravnborge6883b12008-06-05 16:43:46 +02001072#Default location for installed headers
1073export INSTALL_HDR_PATH = $(objtree)/usr
1074
Sam Ravnborge6883b12008-06-05 16:43:46 +02001075hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001076# Find out where the Kbuild file is located to support
1077# arch/$(ARCH)/include/asm
1078hdr-dir = $(strip \
1079 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1080 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1081
1082# If we do an all arch process set dst to asm-$(hdr-arch)
1083hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001084
1085PHONY += __headers
1086__headers: include/linux/version.h scripts_basic FORCE
1087 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001088
1089PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001090headers_install_all:
1091 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001092
David Woodhouse8d730cf2006-06-18 11:58:39 +01001093PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001094headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001095 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1096 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001097 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001098 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001099
Mike Frysinger1f857122007-02-14 00:33:02 -08001100PHONY += headers_check_all
1101headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001102 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001103
David Woodhouse68475352006-06-18 12:02:10 +01001104PHONY += headers_check
1105headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001106 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001107 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001108
David Woodhouse8d730cf2006-06-18 11:58:39 +01001109# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110# Modules
1111
1112ifdef CONFIG_MODULES
1113
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001114# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
1116all: modules
1117
1118# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001119#
1120# A module can be listed more than once in obj-m resulting in
1121# duplicate lines in modules.order files. Those are removed
1122# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Paul Smith4f193362006-03-05 17:14:10 -05001124PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001126 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001127 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001128 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
1131
1132# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001133PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001134modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001137PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138modules_install: _modinst_ _modinst_post
1139
Paul Smith4f193362006-03-05 17:14:10 -05001140PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001142 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 echo "Warning: you may need to install module-init-tools"; \
1144 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1145 sleep 1; \
1146 fi
1147 @rm -rf $(MODLIB)/kernel
1148 @rm -f $(MODLIB)/source
1149 @mkdir -p $(MODLIB)/kernel
1150 @ln -s $(srctree) $(MODLIB)/source
1151 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1152 rm -f $(MODLIB)/build ; \
1153 ln -s $(objtree) $(MODLIB)/build ; \
1154 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001155 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001156 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001158# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159# boot a modules.dep even before / is mounted read-write. However the
1160# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001161PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001163 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001164 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
1166else # CONFIG_MODULES
1167
1168# Modules not configured
1169# ---------------------------------------------------------------------------
1170
1171modules modules_install: FORCE
1172 @echo
1173 @echo "The present kernel configuration has modules disabled."
1174 @echo "Type 'make config' and enable loadable module support."
1175 @echo "Then build a kernel with module support enabled."
1176 @echo
1177 @exit 1
1178
1179endif # CONFIG_MODULES
1180
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181###
1182# Cleaning is done on three levels.
1183# make clean Delete most generated files
1184# Leave enough to build external modules
1185# make mrproper Delete the current configuration, and all generated files
1186# make distclean Remove editor backup files, patch leftover files and the like
1187
1188# Directories & files removed with 'make clean'
1189CLEAN_DIRS += $(MODVERDIR)
1190CLEAN_FILES += vmlinux System.map \
1191 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1192
1193# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001194MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001195MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001196 include/linux/autoconf.h include/linux/version.h \
1197 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001198 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001199 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201# clean - Delete most, but leave enough to build external modules
1202#
1203clean: rm-dirs := $(CLEAN_DIRS)
1204clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001205clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Paul Smith4f193362006-03-05 17:14:10 -05001207PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208$(clean-dirs):
1209 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1210
1211clean: archclean $(clean-dirs)
1212 $(call cmd,rmdirs)
1213 $(call cmd,rmfiles)
1214 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001215 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001216 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001217 -o -name '*.symtypes' -o -name 'modules.order' \
Alexey Dobriyan6b36ab22008-06-07 01:47:09 +04001218 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 -type f -print | xargs rm -f
1220
1221# mrproper - Delete all generated files, including .config
1222#
1223mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1224mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1225mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1226
Paul Smith4f193362006-03-05 17:14:10 -05001227PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228$(mrproper-dirs):
1229 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1230
1231mrproper: clean archmrproper $(mrproper-dirs)
1232 $(call cmd,rmdirs)
1233 $(call cmd,rmfiles)
1234
1235# distclean
1236#
Paul Smith4f193362006-03-05 17:14:10 -05001237PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
1239distclean: mrproper
1240 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001241 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001243 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1245 -type f -print | xargs rm -f
1246
1247
1248# Packaging of the kernel to various formats
1249# ---------------------------------------------------------------------------
1250# rpm target kept for backward compatibility
1251package-dir := $(srctree)/scripts/package
1252
Zach Brown031ecc62006-06-08 22:12:37 -07001253%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001254 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001255rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001256 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258
1259# Brief documentation of the typical targets used
1260# ---------------------------------------------------------------------------
1261
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001262boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001264board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1265board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
1267help:
1268 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001269 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001270 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001271 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001272 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 @echo ''
1274 @echo 'Configuration targets:'
1275 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1276 @echo ''
1277 @echo 'Other generic targets:'
1278 @echo ' all - Build all targets marked with [*]'
1279 @echo '* vmlinux - Build the bare kernel'
1280 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001281 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001282 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1283 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 @echo ' dir/ - Build all files in dir and below'
1285 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001286 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001287 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 @echo ' tags/TAGS - Generate tags file for editors'
1289 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001290 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001291 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001292 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001293 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001294 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 @echo ' checkstack - Generate a list of stack hogs'
1297 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001298 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001299 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001300 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001301 @echo ' headers_check - Sanity check on exported headers'
1302 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001303 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001305 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 @echo ''
1307 @echo 'Documentation targets:'
1308 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1309 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001310 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001312 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 @echo ''
1314 @$(if $(boards), \
1315 $(foreach b, $(boards), \
1316 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1317 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001318 @$(if $(board-dirs), \
1319 $(foreach b, $(board-dirs), \
1320 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1321 printf " %-16s - Show all of the above\\n" help-boards; \
1322 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323
1324 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001325 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001327 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1328 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 @echo ''
1330 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1331 @echo 'For further info see the ./README file'
1332
1333
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001334help-board-dirs := $(addprefix help-,$(board-dirs))
1335
1336help-boards: $(help-board-dirs)
1337
1338boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1339
1340$(help-board-dirs): help-%:
1341 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1342 @$(if $(boards-per-dir), \
1343 $(foreach b, $(boards-per-dir), \
1344 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1345 echo '')
1346
1347
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348# Documentation targets
1349# ---------------------------------------------------------------------------
1350%docs: scripts_basic FORCE
1351 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1352
1353else # KBUILD_EXTMOD
1354
1355###
1356# External module support.
1357# When building external modules the kernel used as basis is considered
1358# read-only, and no consistency checks are made and the make
1359# system is not used on the basis kernel. If updates are required
1360# in the basis kernel ordinary make commands (without M=...) must
1361# be used.
1362#
1363# The following are the only valid targets when building external
1364# modules.
1365# make M=dir clean Delete all automatically generated files
1366# make M=dir modules Make all modules in specified dir
1367# make M=dir Same as 'make M=dir modules'
1368# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001369# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370# Assumes install directory is already created
1371
1372# We are always building modules
1373KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001374PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001376 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Paul Smith4f193362006-03-05 17:14:10 -05001378PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379$(objtree)/Module.symvers:
1380 @test -e $(objtree)/Module.symvers || ( \
1381 echo; \
1382 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1383 echo " is missing; modules will have no dependencies and modversions."; \
1384 echo )
1385
1386module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001387PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388$(module-dirs): crmodverdir $(objtree)/Module.symvers
1389 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1390
1391modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001392 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001393 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
Paul Smith4f193362006-03-05 17:14:10 -05001395PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001396modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001397
Paul Smith4f193362006-03-05 17:14:10 -05001398install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1399PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001400_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001401 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001402 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
Paul Smith4f193362006-03-05 17:14:10 -05001404PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001405_emodinst_post: _emodinst_
1406 $(call cmd,depmod)
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1409
Paul Smith4f193362006-03-05 17:14:10 -05001410PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411$(clean-dirs):
1412 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1413
1414clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001415clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416clean: $(clean-dirs)
1417 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001418 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001420 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1422 -type f -print | xargs rm -f
1423
1424help:
1425 @echo ' Building external modules.'
1426 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1427 @echo ''
1428 @echo ' modules - default target, build the module(s)'
1429 @echo ' modules_install - install the module'
1430 @echo ' clean - remove generated files in module directory only'
1431 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001432
1433# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001434PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001435prepare: ;
1436scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437endif # KBUILD_EXTMOD
1438
1439# Generate tags for editors
1440# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001441quiet_cmd_tags = GEN $@
1442 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
Sam Ravnborga680eed2008-12-03 22:24:13 +01001444tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 $(call cmd,tags)
1446
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447# Scripts to check various things for consistency
1448# ---------------------------------------------------------------------------
1449
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450includecheck:
1451 find * $(RCS_FIND_IGNORE) \
1452 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001453 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
1455versioncheck:
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/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460namespacecheck:
1461 $(PERL) $(srctree)/scripts/namespace.pl
1462
Adrian Bunk295ac052007-08-24 23:04:56 +02001463export_report:
1464 $(PERL) $(srctree)/scripts/export_report.pl
1465
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466endif #ifeq ($(config-targets),1)
1467endif #ifeq ($(mixed-targets),1)
1468
Roman Zippelc30a02e2006-06-08 22:12:50 -07001469PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001470
Jeff Dike011e3a92006-12-13 00:34:12 -08001471# UML needs a little special treatment here. It wants to use the host
1472# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1473# else wants $(ARCH), including people doing cross-builds, which means
1474# that $(SUBARCH) doesn't work here.
1475ifeq ($(ARCH), um)
1476CHECKSTACK_ARCH := $(SUBARCH)
1477else
1478CHECKSTACK_ARCH := $(ARCH)
1479endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480checkstack:
1481 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001482 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
1484kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001485 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1486 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001487kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001488 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Sam Ravnborg06300b22006-01-25 07:13:18 +01001490# Single targets
1491# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001492# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001493# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001494# - build with separate output dir 'make O=...'
1495# - external modules
1496#
1497# target-dir => where to store outputfile
1498# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001499
Sam Ravnborg06300b22006-01-25 07:13:18 +01001500ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001501 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001502 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503else
1504 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001505 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1506 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001507endif
1508
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001509%.s: %.c prepare scripts FORCE
1510 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1511%.i: %.c prepare scripts FORCE
1512 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1513%.o: %.c prepare scripts FORCE
1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1515%.lst: %.c prepare scripts FORCE
1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1517%.s: %.S prepare scripts FORCE
1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1519%.o: %.S prepare scripts FORCE
1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001521%.symtypes: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001523
1524# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001525/: prepare scripts FORCE
1526 $(cmd_crmodverdir)
1527 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1528 $(build)=$(build-dir)
1529%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001530 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001532 $(build)=$(build-dir)
1533%.ko: 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) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001537 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001538
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539# FIXME Should go into a make.lib or something
1540# ===========================================================================
1541
1542quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1543 cmd_rmdirs = rm -rf $(rm-dirs)
1544
1545quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1546 cmd_rmfiles = rm -f $(rm-files)
1547
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001548# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001549quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1550 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001551 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001552 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001553 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001554 $(KERNELRELEASE); \
1555 fi
1556
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001557# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001558# clean it up only when building all modules
1559cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1560 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561
Sam Ravnborg222d3942007-10-15 21:59:31 +02001562a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001563 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001564 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
1566quiet_cmd_as_o_S = AS $@
1567cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1568
1569# read all saved command lines
1570
1571targets := $(wildcard $(sort $(targets)))
1572cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1573
1574ifneq ($(cmd_files),)
1575 $(cmd_files): ; # Do not try to update included dependency files
1576 include $(cmd_files)
1577endif
1578
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1580# Usage:
1581# $(Q)$(MAKE) $(clean)=dir
1582clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1583
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584endif # skip-makefile
1585
Paul Smith4f193362006-03-05 17:14:10 -05001586PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001588
Paul Smith4f193362006-03-05 17:14:10 -05001589# Declare the contents of the .PHONY variable as phony. We keep that
1590# information in a variable se we can use it in if_changed and friends.
1591.PHONY: $(PHONY)