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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds28d03252009-06-24 16:25:37 -07003SUBLEVEL = 31
Linus Torvalds74fca6a2009-09-09 15:13:59 -07004EXTRAVERSION =
Linus Torvalds59a37592009-05-23 14:47:00 -07005NAME = Man-Eating Seals of Antiquity
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
Cheng Renquanb8b06182009-05-26 16:03:07 +080038ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040endif
41ifndef KBUILD_VERBOSE
42 KBUILD_VERBOSE = 0
43endif
44
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040045# Call a source code checker (by default, "sparse") as part of the
46# C compilation.
47#
48# Use 'make C=1' to enable checking of only re-compiled files.
49# Use 'make C=2' to enable checking of *all* source files, regardless
50# of whether they are re-compiled or not.
51#
52# See the file "Documentation/sparse.txt" for more details, including
53# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Cheng Renquanb8b06182009-05-26 16:03:07 +080055ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057endif
58ifndef KBUILD_CHECKSRC
59 KBUILD_CHECKSRC = 0
60endif
61
62# Use make M=dir to specify directory of external module to build
63# Old syntax make ... SUBDIRS=$PWD is still supported
64# Setting the environment variable KBUILD_EXTMOD take precedence
65ifdef SUBDIRS
66 KBUILD_EXTMOD ?= $(SUBDIRS)
67endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Cheng Renquanb8b06182009-05-26 16:03:07 +080069ifeq ("$(origin M)", "command line")
70 KBUILD_EXTMOD := $(M)
71endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73# kbuild supports saving output files in a separate directory.
74# To locate output files in a separate directory two syntaxes are supported.
75# In both cases the working directory must be the root of the kernel src.
76# 1) O=
77# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020078#
Linus Torvalds1da177e2005-04-16 15:20:36 -070079# 2) Set KBUILD_OUTPUT
80# Set the environment variable KBUILD_OUTPUT to point to the directory
81# where the output files shall be placed.
82# export KBUILD_OUTPUT=dir/to/store/output/files/
83# make
84#
85# The O= assignment takes precedence over the KBUILD_OUTPUT environment
86# variable.
87
88
89# KBUILD_SRC is set on invocation of make in OBJ directory
90# KBUILD_SRC is not intended to be used by the regular user (for now)
91ifeq ($(KBUILD_SRC),)
92
93# OK, Make called in directory where kernel src resides
94# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +080095ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097endif
98
99# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500100PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101_all:
102
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100103# Cancel implicit rules on top Makefile
104$(CURDIR)/Makefile Makefile: ;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106ifneq ($(KBUILD_OUTPUT),)
107# Invoke a second make in the output directory, passing relevant variables
108# check that the output directory actually exists
109saved-output := $(KBUILD_OUTPUT)
110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
111$(if $(KBUILD_OUTPUT),, \
112 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Milton Miller0b357862007-09-21 18:09:02 -0500114PHONY += $(MAKECMDGOALS) sub-make
115
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500117 $(Q)@:
118
119sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
121 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
123 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125# Leave processing to above invocation of make
126skip-makefile := 1
127endif # ifneq ($(KBUILD_OUTPUT),)
128endif # ifeq ($(KBUILD_SRC),)
129
130# We process the rest of the Makefile if this is the final invocation of make
131ifeq ($(skip-makefile),)
132
133# If building an external module we do not care about the all: rule
134# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500135PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136ifeq ($(KBUILD_EXTMOD),)
137_all: all
138else
139_all: modules
140endif
141
142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143objtree := $(CURDIR)
144src := $(srctree)
145obj := $(objtree)
146
Mattia Dongili0f558c32006-02-19 13:50:37 +0100147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Amerigo Wang11294232009-06-19 03:40:26 -0400149export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152# SUBARCH tells the usermode build what the underlying arch is. That is set
153# first, and if a usermode build is happening, the "ARCH=um" on the command
154# line overrides the setting of ARCH below. If a native build is happening,
155# then ARCH is assigned, getting whatever value it gets normally, and
156# SUBARCH is subsequently ignored.
157
158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
159 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800160 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900162 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164# Cross compiling and selecting different set of gcc/bin-utils
165# ---------------------------------------------------------------------------
166#
167# When performing cross compilation for other architectures ARCH shall be set
168# to the target architecture. (See arch/* for the possibilities).
169# ARCH can be set during invocation of make:
170# make ARCH=ia64
171# Another way is to have ARCH set in the environment.
172# The default ARCH is the host where make is executed.
173
174# CROSS_COMPILE specify the prefix used for all executables used
175# during compilation. Only gcc and related bin-utils executables
176# are prefixed with $(CROSS_COMPILE).
177# CROSS_COMPILE can be set on the command line
178# make CROSS_COMPILE=ia64-linux-
179# Alternatively CROSS_COMPILE can be set in the environment.
180# Default value for CROSS_COMPILE is not to prefix executables
181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg57554332009-09-20 12:24:55 +0200182#
183# To force ARCH and CROSS_COMPILE settings include kernel.* files
184# in the kernel tree - do not patch this file.
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100185export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg57554332009-09-20 12:24:55 +0200186
187# Kbuild save the ARCH and CROSS_COMPILE setting in kernel.* files.
188# Restore these settings and check that user did not specify
189# conflicting values.
190
191saved_arch := $(shell cat include/generated/kernel.arch 2> /dev/null)
192saved_cross := $(shell cat include/generated/kernel.cross 2> /dev/null)
193
194ifneq ($(CROSS_COMPILE),)
195 ifneq ($(saved_cross),)
196 ifneq ($(CROSS_COMPILE),$(saved_cross))
197 $(error CROSS_COMPILE changed from \
198 "$(saved_cross)" to \
199 to "$(CROSS_COMPILE)". \
200 Use "make mrproper" to fix it up)
201 endif
202 endif
203else
204 CROSS_COMPILE := $(saved_cross)
205endif
206
207ifneq ($(ARCH),)
208 ifneq ($(saved_arch),)
209 ifneq ($(saved_arch),$(ARCH))
210 $(error ARCH changed from \
211 "$(saved_arch)" to "$(ARCH)". \
212 Use "make mrproper" to fix it up)
213 endif
214 endif
215else
216 ifneq ($(saved_arch),)
217 ARCH := $(saved_arch)
218 else
219 ARCH := $(SUBARCH)
220 endif
221endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200224UTS_MACHINE := $(ARCH)
225SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Sam Ravnborgd746d642007-11-12 20:14:19 +0100227# Additional ARCH settings for x86
228ifeq ($(ARCH),i386)
229 SRCARCH := x86
230endif
231ifeq ($(ARCH),x86_64)
232 SRCARCH := x86
233endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200234
Sam Ravnborg5e538792008-12-02 23:17:12 -0800235# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200236ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800237 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200238endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200239
Paul Mundt3cc000b2009-04-11 08:39:27 +0900240# Additional ARCH settings for sh
241ifeq ($(ARCH),sh64)
242 SRCARCH := sh
243endif
244
Sam Ravnborg5e538792008-12-02 23:17:12 -0800245# Where to locate arch specific headers
246hdr-arch := $(SRCARCH)
247
Sam Ravnborg49148022009-01-16 21:58:10 +1000248ifeq ($(ARCH),m68knommu)
249 hdr-arch := m68k
250endif
251
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700252KCONFIG_CONFIG ?= .config
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254# SHELL used by kbuild
255CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
256 else if [ -x /bin/bash ]; then echo /bin/bash; \
257 else echo sh; fi ; fi)
258
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200259HOSTCC = gcc
260HOSTCXX = g++
261HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
262HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200264# Decide whether to build built-in, modular, or both.
265# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267KBUILD_MODULES :=
268KBUILD_BUILTIN := 1
269
270# If we have only "make modules", don't compile built-in objects.
271# When we're building modules with modversions, we need to consider
272# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200273# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275ifeq ($(MAKECMDGOALS),modules)
276 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
277endif
278
279# If we have "make <whatever> modules", compile modules
280# in addition to whatever we do anyway.
281# Just "make" or "make all" shall build modules as well
282
283ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
284 KBUILD_MODULES := 1
285endif
286
287ifeq ($(MAKECMDGOALS),)
288 KBUILD_MODULES := 1
289endif
290
Sam Ravnborge579d352005-07-27 08:10:10 +0200291export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
293
294# Beautify output
295# ---------------------------------------------------------------------------
296#
297# Normally, we echo the whole command before executing it. By making
298# that echo $($(quiet)$(cmd)), we now have the possibility to set
299# $(quiet) to choose other forms of output instead, e.g.
300#
301# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
302# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
303#
304# If $(quiet) is empty, the whole command will be printed.
305# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200306# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307# the variable $(silent_cmd_cc_o_c) doesn't exist.
308#
Adrian Bunka58a4142006-01-10 00:08:17 +0100309# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310# for commands that shall be hidden in non-verbose mode.
311#
312# $(Q)ln $@ :<
313#
314# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
315# If KBUILD_VERBOSE equals 1 then the above command is displayed.
316
317ifeq ($(KBUILD_VERBOSE),1)
318 quiet =
319 Q =
320else
321 quiet=quiet_
322 Q = @
323endif
324
325# If the user is running make -s (silent mode), suppress echoing of
326# commands
327
328ifneq ($(findstring s,$(MAKEFLAGS)),)
329 quiet=silent_
330endif
331
332export quiet Q KBUILD_VERBOSE
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335# Look for make include files relative to root of kernel src
336MAKEFLAGS += --include-dir=$(srctree)
337
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100338# We need some generic definitions (do not try to remake the file).
339$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800340include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342# Make variables (CC, etc...)
343
344AS = $(CROSS_COMPILE)as
345LD = $(CROSS_COMPILE)ld
346CC = $(CROSS_COMPILE)gcc
347CPP = $(CC) -E
348AR = $(CROSS_COMPILE)ar
349NM = $(CROSS_COMPILE)nm
350STRIP = $(CROSS_COMPILE)strip
351OBJCOPY = $(CROSS_COMPILE)objcopy
352OBJDUMP = $(CROSS_COMPILE)objdump
353AWK = awk
354GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200355INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356DEPMOD = /sbin/depmod
357KALLSYMS = scripts/kallsyms
358PERL = perl
359CHECK = sparse
360
Hannes Eder80a7d1d92008-12-27 22:38:44 +0100361CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
362 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363MODFLAGS = -DMODULE
364CFLAGS_MODULE = $(MODFLAGS)
365AFLAGS_MODULE = $(MODFLAGS)
Tejun Heo405d9672009-06-24 15:13:38 +0900366LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367CFLAGS_KERNEL =
368AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700369CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371
372# Use LINUXINCLUDE when you must reference the include/ directory.
373# Needed to be compatible with the O= option
374LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100375 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200376 -I$(srctree)/arch/$(hdr-arch)/include \
377 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100379KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200381KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700382 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300383 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800384 -Wno-format-security \
385 -fno-delete-null-pointer-checks
Sam Ravnborg222d3942007-10-15 21:59:31 +0200386KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700388# Read KERNELRELEASE from include/config/kernel.release (if it exists)
389KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100390KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100391
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200392export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100393export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200394export CPP AR NM STRIP OBJCOPY OBJDUMP
395export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200396export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
Sam Ravnborg06c50402007-10-15 22:17:25 +0200398export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700399export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200400export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402# When compiling out-of-tree modules, put MODVERDIR in the module
403# tree rather than in the kernel tree. The kernel tree might
404# even be read-only.
405export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407# Files to ignore in find ... statements
408
Trond Myklebust406119f2005-10-27 14:46:53 -0400409RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
410export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
412# ===========================================================================
413# Rules shared between *config targets and build targets
414
415# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500416PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417scripts_basic:
418 $(Q)$(MAKE) $(build)=scripts/basic
419
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200420# To avoid any implicit rule to kick in, define an empty command.
421scripts/basic/%: scripts_basic ;
422
Paul Smith4f193362006-03-05 17:14:10 -0500423PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200424# outputmakefile generates a Makefile in the output directory, if using a
425# separate output directory. This allows convenient use of make in the
426# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200428ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100429 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200430 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
431 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
432endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434# To make sure we do not include .config for any of the *config targets
435# catch them early, and hand them over to scripts/kconfig/Makefile
436# It is allowed to specify more targets when calling make, including
437# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200438# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439# Detect when mixed targets is specified, and make a second invocation
440# of make so .config is not included in this case either (for *config).
441
Roman Zippel3eb3c742007-01-10 14:45:28 +0100442no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700443 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100444 include/linux/version.h headers_% \
445 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447config-targets := 0
448mixed-targets := 0
449dot-config := 1
450
451ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
452 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
453 dot-config := 0
454 endif
455endif
456
457ifeq ($(KBUILD_EXTMOD),)
458 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
459 config-targets := 1
460 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
461 mixed-targets := 1
462 endif
463 endif
464endif
465
466ifeq ($(mixed-targets),1)
467# ===========================================================================
468# We're called with mixed targets (*config and build targets).
469# Handle them one by one.
470
471%:: FORCE
472 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
473
474else
475ifeq ($(config-targets),1)
476# ===========================================================================
477# *config targets only - make sure prerequisites are updated, and descend
478# in scripts/kconfig to make the *config target
479
480# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
481# KBUILD_DEFCONFIG may point out an alternative default configuration
482# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200483include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400484export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Sam Ravnborg57554332009-09-20 12:24:55 +0200486# save ARCH & CROSS_COMPILE settings
487$(shell mkdir -p include/generated && \
488 echo $(ARCH) > include/generated/kernel.arch && \
489 echo $(CROSS_COMPILE) > include/generated/kernel.cross)
490
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100491config: scripts_basic outputmakefile FORCE
492 $(Q)mkdir -p include/linux include/config
493 $(Q)$(MAKE) $(build)=scripts/kconfig $@
494
495%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700496 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 $(Q)$(MAKE) $(build)=scripts/kconfig $@
498
499else
500# ===========================================================================
501# Build targets only - this includes vmlinux, arch specific targets, clean
502# targets and others. In general all targets except *config targets.
503
504ifeq ($(KBUILD_EXTMOD),)
505# Additional helpers built in scripts/
506# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200507# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500508PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700509scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 $(Q)$(MAKE) $(build)=$(@)
511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512# Objects we will link into vmlinux / subdirs we need to visit
513init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100514drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515net-y := net/
516libs-y := lib/
517core-y := usr/
518endif # KBUILD_EXTMOD
519
520ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200521# Read in config
522-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200524ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525# Read in dependencies to all Kconfig* files, make sure to run
526# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700527-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700530$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Roman Zippelc955cca2006-06-08 22:12:39 -0700532# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100533# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200534# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100535# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700536include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
538else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200539# external modules needs include/linux/autoconf.h and include/config/auto.conf
540# but do not care if they are up-to-date. Use auto.conf to trigger the test
541PHONY += include/config/auto.conf
542
543include/config/auto.conf:
544 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
545 echo; \
546 echo " ERROR: Kernel configuration is invalid."; \
547 echo " include/linux/autoconf.h or $@ are missing."; \
548 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
549 echo; \
550 /bin/false)
551
552endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554else
555# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700556include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200557endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
559# The all: target is the default when no target is given on the
560# command line.
561# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200562# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563all: vmlinux
564
565ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200566KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200568KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569endif
570
Ralf Baechlebef5b542008-07-16 13:02:24 +0100571include $(srctree)/arch/$(SRCARCH)/Makefile
572
Mike Frysinger08f67462009-06-04 16:29:08 -0700573ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100574KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
575endif
576
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100577# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900578ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100579KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900580endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200583KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200585KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586endif
587
588ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200589KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200590KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591endif
592
Steven Rostedt606576c2008-10-06 19:06:12 -0400593ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200594KBUILD_CFLAGS += -pg
595endif
596
Sam Ravnborg91341d42008-01-21 21:31:44 +0100597# We trigger additional mismatches with less inlining
598ifdef CONFIG_DEBUG_SECTION_MISMATCH
599KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
600endif
601
Sam Ravnborge8e69932005-04-30 16:51:42 -0700602# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700603NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700604CHECKFLAGS += $(NOSTDINC_FLAGS)
605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200607KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200609# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200610KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400612# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700613KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700614
Kyle McMartin00308642009-03-23 15:25:49 -0400615# revert to pre-gcc-4.4 behaviour of .eh_frame
616KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
617
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700618# conserve stack if available
619KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
620
Sam Ravnborg06c50402007-10-15 22:17:25 +0200621# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100622# But warn user when we do so
623warn-assign = \
624$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
625
626ifneq ($(KCPPFLAGS),)
627 $(call warn-assign,CPPFLAGS)
628 KBUILD_CPPFLAGS += $(KCPPFLAGS)
629endif
630ifneq ($(KAFLAGS),)
631 $(call warn-assign,AFLAGS)
632 KBUILD_AFLAGS += $(KAFLAGS)
633endif
634ifneq ($(KCFLAGS),)
635 $(call warn-assign,CFLAGS)
636 KBUILD_CFLAGS += $(KCFLAGS)
637endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200638
Roland McGrath18991192007-07-19 01:48:40 -0700639# Use --build-id when available.
640LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200641 $(call cc-ldoption, -Wl$(comma)--build-id,))
Roland McGrath18991192007-07-19 01:48:40 -0700642LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
643LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
644
David Howells5d7d18f2009-03-04 11:59:07 -0800645ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200646LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800647endif
648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200650# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651# set in the environment
652# Also any assignments in arch/$(ARCH)/Makefile take precedence over
653# this default value
654export KBUILD_IMAGE ?= vmlinux
655
656#
657# INSTALL_PATH specifies where to place the updated kernel and system map
658# images. Default is /boot, but you can set it to other values
659export INSTALL_PATH ?= /boot
660
661#
662# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
663# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200664# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665#
666
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100667MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668export MODLIB
669
Theodore Ts'oac031f22006-06-21 20:53:09 -0400670#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100671# INSTALL_MOD_STRIP, if defined, will cause modules to be
672# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
673# the default option --strip-debug will be used. Otherwise,
674# INSTALL_MOD_STRIP will used as the options to the strip command.
675
Theodore Ts'oac031f22006-06-21 20:53:09 -0400676ifdef INSTALL_MOD_STRIP
677ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100678mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400679else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100680mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400681endif # INSTALL_MOD_STRIP=1
682else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100683mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400684endif # INSTALL_MOD_STRIP
685export mod_strip_cmd
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100689core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
692 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
693 $(net-y) $(net-m) $(libs-y) $(libs-m)))
694
695vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
696 $(init-n) $(init-) \
697 $(core-n) $(core-) $(drivers-n) $(drivers-) \
698 $(net-n) $(net-) $(libs-n) $(libs-))))
699
700init-y := $(patsubst %/, %/built-in.o, $(init-y))
701core-y := $(patsubst %/, %/built-in.o, $(core-y))
702drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
703net-y := $(patsubst %/, %/built-in.o, $(net-y))
704libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
705libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
706libs-y := $(libs-y1) $(libs-y2)
707
708# Build vmlinux
709# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200710# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200712# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713# Ordering when linking is important, and $(vmlinux-init) must be first.
714#
715# vmlinux
716# ^
717# |
718# +-< $(vmlinux-init)
719# | +--< init/version.o + more
720# |
721# +--< $(vmlinux-main)
722# | +--< driver/built-in.o mm/built-in.o + more
723# |
724# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
725#
726# vmlinux version (uname -v) cannot be updated during normal
727# descending-into-subdirs phase since we do not yet know if we need to
728# update vmlinux.
729# Therefore this step is delayed until just before final link of vmlinux -
730# except in the kallsyms case where it is done just before adding the
731# symbols to the kernel.
732#
733# System.map is generated to document addresses of all kernel symbols
734
735vmlinux-init := $(head-y) $(init-y)
736vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
737vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200738vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100739export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740
741# Rule to link vmlinux - also used during CONFIG_KALLSYMS
742# May be overridden by arch/$(ARCH)/Makefile
743quiet_cmd_vmlinux__ ?= LD $@
744 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
745 -T $(vmlinux-lds) $(vmlinux-init) \
746 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200747 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749# Generate new vmlinux version
750quiet_cmd_vmlinux_version = GEN .version
751 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200752 if [ ! -r .version ]; then \
753 rm -f .version; \
754 echo 1 >.version; \
755 else \
756 mv .version .old_version; \
757 expr 0$$(cat .old_version) + 1 >.version; \
758 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 $(MAKE) $(build)=init
760
761# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200762quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
764
765# Link of vmlinux
766# If CONFIG_KALLSYMS is set .version is already updated
767# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700768# Use + in front of the vmlinux_version rule to silent warning with make -j2
769# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700771 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
773
774 $(call cmd,vmlinux__)
775 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
776
Sam Ravnborg46352812006-08-08 21:41:18 +0200777 $(Q)$(if $($(quiet)cmd_sysmap), \
778 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
779 $(cmd_sysmap) $@ System.map; \
780 if [ $$? -ne 0 ]; then \
781 rm -f $@; \
782 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 fi;
784 $(verify_kallsyms)
785endef
786
787
788ifdef CONFIG_KALLSYMS
789# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
790# It's a three stage process:
791# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
792# empty
793# Running kallsyms on that gives us .tmp_kallsyms1.o with
794# the right size - vmlinux version (uname -v) is updated during this step
795# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
796# but due to the added section, some addresses have shifted.
797# From here, we generate a correct .tmp_kallsyms2.o
798# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
799# o Verify that the System.map from vmlinux matches the map from
800# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
801# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
802# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
803# temporary bypass to allow the kernel to be built while the
804# maintainers work out what went wrong with kallsyms.
805
806ifdef CONFIG_KALLSYMS_EXTRA_PASS
807last_kallsyms := 3
808else
809last_kallsyms := 2
810endif
811
812kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
813
814define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200815 $(Q)$(if $($(quiet)cmd_sysmap), \
816 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200818 $(Q)cmp -s System.map .tmp_System.map || \
819 (echo Inconsistent kallsyms data; \
820 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 rm .tmp_kallsyms* ; /bin/false )
822endef
823
824# Update vmlinux version before link
825# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200826# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827cmd_ksym_ld = $(cmd_vmlinux__)
828define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200829 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 +$(call cmd,vmlinux_version)
831 $(call cmd,vmlinux__)
832 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
833endef
834
835# Generate .S file with all kernel symbols
836quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100837 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
838 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100840.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 $(call if_changed_dep,as_o_S)
842
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100843.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 $(call cmd,kallsyms)
845
846# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100847.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
848 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100850.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
851 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100853.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
854 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
856# Needs to visit scripts/ before $(KALLSYMS) can be used.
857$(KALLSYMS): scripts ;
858
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000859# Generate some data for debugging strange kallsyms problems
860debug_kallsyms: .tmp_map$(last_kallsyms)
861
862.tmp_map%: .tmp_vmlinux% FORCE
863 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
864
865.tmp_map3: .tmp_map2
866
867.tmp_map2: .tmp_map1
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869endif # ifdef CONFIG_KALLSYMS
870
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200871# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
872# relevant sections renamed as per the linker script.
873quiet_cmd_vmlinux-modpost = LD $@
874 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
875 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200876 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200877define rule_vmlinux-modpost
878 :
879 +$(call cmd,vmlinux-modpost)
880 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
881 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
882endef
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100885vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700886ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100887 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700888endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700889ifdef CONFIG_SAMPLES
890 $(Q)$(MAKE) $(build)=samples
891endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700892ifdef CONFIG_BUILD_DOCSRC
893 $(Q)$(MAKE) $(build)=Documentation
894endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200895 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200897 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
Sam Ravnborg310f8242008-01-21 22:57:09 +0100899# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100900ifdef CONFIG_KALLSYMS
901.tmp_vmlinux1: vmlinux.o
902endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200903
904modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
905vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200906 $(call if_changed_rule,vmlinux-modpost)
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908# The actual objects are generated when descending,
909# make sure no implicit rule kicks in
910$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
911
912# Handle descending into subdirectories listed in $(vmlinux-dirs)
913# Preset locale variables to speed up the build process. Limit locale
914# tweaks to this spot to avoid wrong language settings when running
915# make menuconfig etc.
916# Error messages still appears in the original language
917
Paul Smith4f193362006-03-05 17:14:10 -0500918PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200919$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 $(Q)$(MAKE) $(build)=$@
921
Sam Ravnborgcb584552006-01-09 21:20:34 +0100922# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100923#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400924# The KERNELRELEASE value built here is stored in the file
925# include/config/kernel.release, and is used when executing several
926# make targets, such as "make install" or "make modules_install."
927#
928# The eventual kernel release string consists of the following fields,
929# shown in a hierarchical format to show how smaller parts are concatenated
930# to form the larger and final value, with values coming from places like
931# the Makefile, kernel config options, make command line options and/or
932# SCM tag information.
933#
934# $(KERNELVERSION)
935# $(VERSION) eg, 2
936# $(PATCHLEVEL) eg, 6
937# $(SUBLEVEL) eg, 18
938# $(EXTRAVERSION) eg, -rc6
939# $(localver-full)
940# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100941# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400942# $(CONFIG_LOCALVERSION) (from kernel config setting)
943# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
944# ./scripts/setlocalversion (SCM tag, if one exists)
945# $(LOCALVERSION) (from make command line if provided)
946#
947# Note how the final $(localver-auto) string is included *only* if the
948# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
949# moment, only git is supported but other SCMs can edit the script
950# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100951
Oleg Verych76c32952007-02-06 02:18:22 +0100952pattern = ".*/localversion[^~]*"
953string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800954 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100955
Oleg Verych76c32952007-02-06 02:18:22 +0100956localver = $(subst $(space),, $(string) \
957 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200958
Sam Ravnborgcb584552006-01-09 21:20:34 +0100959# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
960# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200961# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100962#
Josh Huntb925dbf2009-02-12 10:16:05 -0800963# .scmversion is used when generating rpm packages so we do not loose
964# the version information from the SCM when we do the build of the kernel
965# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100966ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800967
968ifeq ($(wildcard .scmversion),)
969 _localver-auto = $(shell $(CONFIG_SHELL) \
970 $(srctree)/scripts/setlocalversion $(srctree))
971else
972 _localver-auto = $(shell cat .scmversion 2> /dev/null)
973endif
974
Sam Ravnborgcb584552006-01-09 21:20:34 +0100975 localver-auto = $(LOCALVERSION)$(_localver-auto)
976endif
977
978localver-full = $(localver)$(localver-auto)
979
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700980# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100981kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700982include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100983 $(Q)rm -f $@
984 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100985
986
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200988# or the modules are listed in "prepare".
989# A multi level approach is used. prepareN is processed before prepareN-1.
990# archprepare is used in arch Makefiles and when processed asm symlink,
991# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200993# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500994PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200995
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200996# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997# and if so do:
998# 1) Check that make has not been executed in the kernel src $(srctree)
999# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001000prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001002 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -07001003 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 echo " $(srctree) is not clean, please run 'make mrproper'";\
1005 echo " in the '$(srctree)' directory.";\
1006 /bin/false; \
1007 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +02001008 $(Q)if [ ! -d include2 ]; then \
1009 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001010 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +02001011 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012endif
1013
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001014# prepare2 creates a makefile if using a separate output directory
1015prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
Roman Zippel3eb3c742007-01-10 14:45:28 +01001017prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
1018 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001019 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001021archprepare: prepare1 scripts_basic
1022
1023prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +02001024 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +02001025 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -08001028prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001030# The asm symlink changes when $(ARCH) changes.
1031# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001032# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001033define check-symlink
1034 set -e; \
1035 if [ -L include/asm ]; then \
1036 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
1037 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001038 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
1039 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001040 exit 1; \
1041 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001042 test -e $$asmlink || rm include/asm; \
1043 elif [ -d include/asm ]; then \
1044 echo "ERROR: $@ is a directory but a symlink was expected";\
1045 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001046 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001047endef
1048
1049# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001050# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001051# directory for generated filesas used by some architectures.
1052define create-symlink
1053 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001054 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001055 if [ ! -d include/asm-$(SRCARCH) ]; then \
1056 mkdir -p include/asm-$(SRCARCH); \
1057 fi; \
1058 ln -fsn asm-$(SRCARCH) $@; \
1059 fi
1060endef
1061
1062include/asm: FORCE
1063 $(Q)$(check-symlink)
1064 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066# Generate some files
1067# ---------------------------------------------------------------------------
1068
1069# KERNELRELEASE can change from a few different places, meaning version.h
1070# needs to be updated, so this check is forced on all builds
1071
1072uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001073define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001075 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1076 exit 1; \
1077 fi; \
1078 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079endef
1080
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001081define filechk_version.h
1082 (echo \#define LINUX_VERSION_CODE $(shell \
1083 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1084 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1085endef
1086
1087include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 $(call filechk,version.h)
1089
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001090include/linux/utsrelease.h: include/config/kernel.release FORCE
1091 $(call filechk,utsrelease.h)
1092
Vegard Nossum179efcb2008-12-16 12:33:43 +01001093PHONY += headerdep
1094headerdep:
1095 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1096
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097# ---------------------------------------------------------------------------
1098
Paul Smith4f193362006-03-05 17:14:10 -05001099PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100depend dep:
1101 @echo '*** Warning: make $@ is unnecessary now.'
1102
1103# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001104# Firmware install
1105INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1106export INSTALL_FW_PATH
1107
1108PHONY += firmware_install
1109firmware_install: FORCE
1110 @mkdir -p $(objtree)/firmware
1111 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1112
1113# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001114# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001115
Sam Ravnborge6883b12008-06-05 16:43:46 +02001116#Default location for installed headers
1117export INSTALL_HDR_PATH = $(objtree)/usr
1118
Sam Ravnborge6883b12008-06-05 16:43:46 +02001119hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001120# Find out where the Kbuild file is located to support
1121# arch/$(ARCH)/include/asm
1122hdr-dir = $(strip \
1123 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1124 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1125
1126# If we do an all arch process set dst to asm-$(hdr-arch)
1127hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001128
1129PHONY += __headers
1130__headers: include/linux/version.h scripts_basic FORCE
1131 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001132
1133PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001134headers_install_all:
1135 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001136
David Woodhouse8d730cf2006-06-18 11:58:39 +01001137PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001138headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001139 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1140 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001141 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001142 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001143
Mike Frysinger1f857122007-02-14 00:33:02 -08001144PHONY += headers_check_all
1145headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001146 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001147
David Woodhouse68475352006-06-18 12:02:10 +01001148PHONY += headers_check
1149headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001150 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001151 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001152
David Woodhouse8d730cf2006-06-18 11:58:39 +01001153# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154# Modules
1155
1156ifdef CONFIG_MODULES
1157
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001158# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
1160all: modules
1161
1162# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001163#
1164# A module can be listed more than once in obj-m resulting in
1165# duplicate lines in modules.order files. Those are removed
1166# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
Paul Smith4f193362006-03-05 17:14:10 -05001168PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001170 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001171 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001172 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001173 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
1175
1176# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001177PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001178modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179
1180# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001181PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182modules_install: _modinst_ _modinst_post
1183
Paul Smith4f193362006-03-05 17:14:10 -05001184PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001186 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 echo "Warning: you may need to install module-init-tools"; \
1188 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1189 sleep 1; \
1190 fi
1191 @rm -rf $(MODLIB)/kernel
1192 @rm -f $(MODLIB)/source
1193 @mkdir -p $(MODLIB)/kernel
1194 @ln -s $(srctree) $(MODLIB)/source
1195 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1196 rm -f $(MODLIB)/build ; \
1197 ln -s $(objtree) $(MODLIB)/build ; \
1198 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001199 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001200 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001202# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203# boot a modules.dep even before / is mounted read-write. However the
1204# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001205PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001207 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001208 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
1210else # CONFIG_MODULES
1211
1212# Modules not configured
1213# ---------------------------------------------------------------------------
1214
1215modules modules_install: FORCE
1216 @echo
1217 @echo "The present kernel configuration has modules disabled."
1218 @echo "Type 'make config' and enable loadable module support."
1219 @echo "Then build a kernel with module support enabled."
1220 @echo
1221 @exit 1
1222
1223endif # CONFIG_MODULES
1224
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225###
1226# Cleaning is done on three levels.
1227# make clean Delete most generated files
1228# Leave enough to build external modules
1229# make mrproper Delete the current configuration, and all generated files
1230# make distclean Remove editor backup files, patch leftover files and the like
1231
1232# Directories & files removed with 'make clean'
1233CLEAN_DIRS += $(MODVERDIR)
1234CLEAN_FILES += vmlinux System.map \
1235 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1236
1237# Directories & files removed with 'make mrproper'
Sam Ravnborgf14875a2009-04-18 23:51:08 +02001238MRPROPER_DIRS += include/config include2 usr/include include/generated
Tore Anderson50aa88e2006-01-07 15:34:40 +01001239MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001240 include/linux/autoconf.h include/linux/version.h \
1241 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001242 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001243 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244
1245# clean - Delete most, but leave enough to build external modules
1246#
1247clean: rm-dirs := $(CLEAN_DIRS)
1248clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001249clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Paul Smith4f193362006-03-05 17:14:10 -05001251PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252$(clean-dirs):
1253 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1254
1255clean: archclean $(clean-dirs)
1256 $(call cmd,rmdirs)
1257 $(call cmd,rmfiles)
1258 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001259 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001260 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001261 -o -name '*.symtypes' -o -name 'modules.order' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001262 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1263 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
1265# mrproper - Delete all generated files, including .config
1266#
1267mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1268mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1269mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1270
Paul Smith4f193362006-03-05 17:14:10 -05001271PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272$(mrproper-dirs):
1273 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1274
1275mrproper: clean archmrproper $(mrproper-dirs)
1276 $(call cmd,rmdirs)
1277 $(call cmd,rmfiles)
1278
1279# distclean
1280#
Paul Smith4f193362006-03-05 17:14:10 -05001281PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283distclean: mrproper
1284 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001285 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001287 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1289 -type f -print | xargs rm -f
1290
1291
1292# Packaging of the kernel to various formats
1293# ---------------------------------------------------------------------------
1294# rpm target kept for backward compatibility
1295package-dir := $(srctree)/scripts/package
1296
Zach Brown031ecc62006-06-08 22:12:37 -07001297%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001298 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001299rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001300 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
1302
1303# Brief documentation of the typical targets used
1304# ---------------------------------------------------------------------------
1305
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001306boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001308board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1309board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310
1311help:
1312 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001313 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001314 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001315 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001316 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 @echo ''
1318 @echo 'Configuration targets:'
1319 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1320 @echo ''
1321 @echo 'Other generic targets:'
1322 @echo ' all - Build all targets marked with [*]'
1323 @echo '* vmlinux - Build the bare kernel'
1324 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001325 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001326 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1327 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 @echo ' dir/ - Build all files in dir and below'
1329 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001330 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001331 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 @echo ' tags/TAGS - Generate tags file for editors'
1333 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001334 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001335 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001336 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001337 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001338 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 @echo ' checkstack - Generate a list of stack hogs'
1341 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001342 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001343 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001344 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001345 @echo ' headers_check - Sanity check on exported headers'
1346 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001347 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001349 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 @echo ''
1351 @echo 'Documentation targets:'
1352 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1353 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001354 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001356 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 @echo ''
1358 @$(if $(boards), \
1359 $(foreach b, $(boards), \
1360 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1361 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001362 @$(if $(board-dirs), \
1363 $(foreach b, $(board-dirs), \
1364 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1365 printf " %-16s - Show all of the above\\n" help-boards; \
1366 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
1368 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001369 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001371 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1372 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 @echo ''
1374 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1375 @echo 'For further info see the ./README file'
1376
1377
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001378help-board-dirs := $(addprefix help-,$(board-dirs))
1379
1380help-boards: $(help-board-dirs)
1381
1382boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1383
1384$(help-board-dirs): help-%:
1385 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1386 @$(if $(boards-per-dir), \
1387 $(foreach b, $(boards-per-dir), \
1388 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1389 echo '')
1390
1391
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392# Documentation targets
1393# ---------------------------------------------------------------------------
1394%docs: scripts_basic FORCE
1395 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1396
1397else # KBUILD_EXTMOD
1398
1399###
1400# External module support.
1401# When building external modules the kernel used as basis is considered
1402# read-only, and no consistency checks are made and the make
1403# system is not used on the basis kernel. If updates are required
1404# in the basis kernel ordinary make commands (without M=...) must
1405# be used.
1406#
1407# The following are the only valid targets when building external
1408# modules.
1409# make M=dir clean Delete all automatically generated files
1410# make M=dir modules Make all modules in specified dir
1411# make M=dir Same as 'make M=dir modules'
1412# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001413# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414# Assumes install directory is already created
1415
1416# We are always building modules
1417KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001418PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001420 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Paul Smith4f193362006-03-05 17:14:10 -05001422PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423$(objtree)/Module.symvers:
1424 @test -e $(objtree)/Module.symvers || ( \
1425 echo; \
1426 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1427 echo " is missing; modules will have no dependencies and modversions."; \
1428 echo )
1429
1430module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001431PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432$(module-dirs): crmodverdir $(objtree)/Module.symvers
1433 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1434
1435modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001436 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001437 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
Paul Smith4f193362006-03-05 17:14:10 -05001439PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001440modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001441
Paul Smith4f193362006-03-05 17:14:10 -05001442install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1443PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001444_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001445 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001446 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Paul Smith4f193362006-03-05 17:14:10 -05001448PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001449_emodinst_post: _emodinst_
1450 $(call cmd,depmod)
1451
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1453
Paul Smith4f193362006-03-05 17:14:10 -05001454PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455$(clean-dirs):
1456 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1457
1458clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001459clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1460 $(KBUILD_EXTMOD)/Module.markers \
1461 $(KBUILD_EXTMOD)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462clean: $(clean-dirs)
1463 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001464 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001466 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001467 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1468 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469
1470help:
1471 @echo ' Building external modules.'
1472 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1473 @echo ''
1474 @echo ' modules - default target, build the module(s)'
1475 @echo ' modules_install - install the module'
1476 @echo ' clean - remove generated files in module directory only'
1477 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001478
1479# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001480PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001481prepare: ;
1482scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483endif # KBUILD_EXTMOD
1484
1485# Generate tags for editors
1486# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001487quiet_cmd_tags = GEN $@
1488 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Sam Ravnborga680eed2008-12-03 22:24:13 +01001490tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 $(call cmd,tags)
1492
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493# Scripts to check various things for consistency
1494# ---------------------------------------------------------------------------
1495
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496includecheck:
1497 find * $(RCS_FIND_IGNORE) \
1498 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001499 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500
1501versioncheck:
1502 find * $(RCS_FIND_IGNORE) \
1503 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001504 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506namespacecheck:
1507 $(PERL) $(srctree)/scripts/namespace.pl
1508
Adrian Bunk295ac052007-08-24 23:04:56 +02001509export_report:
1510 $(PERL) $(srctree)/scripts/export_report.pl
1511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512endif #ifeq ($(config-targets),1)
1513endif #ifeq ($(mixed-targets),1)
1514
Roman Zippelc30a02e2006-06-08 22:12:50 -07001515PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001516
Jeff Dike011e3a92006-12-13 00:34:12 -08001517# UML needs a little special treatment here. It wants to use the host
1518# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1519# else wants $(ARCH), including people doing cross-builds, which means
1520# that $(SUBARCH) doesn't work here.
1521ifeq ($(ARCH), um)
1522CHECKSTACK_ARCH := $(SUBARCH)
1523else
1524CHECKSTACK_ARCH := $(ARCH)
1525endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526checkstack:
1527 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001528 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
1530kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001531 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1532 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001533kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001534 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Sam Ravnborg06300b22006-01-25 07:13:18 +01001536# Single targets
1537# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001538# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001539# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001540# - build with separate output dir 'make O=...'
1541# - external modules
1542#
1543# target-dir => where to store outputfile
1544# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001545
Sam Ravnborg06300b22006-01-25 07:13:18 +01001546ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001547 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001548 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001549else
1550 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001551 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1552 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001553endif
1554
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001555%.s: %.c prepare scripts FORCE
1556 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1557%.i: %.c prepare scripts FORCE
1558 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1559%.o: %.c prepare scripts FORCE
1560 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1561%.lst: %.c prepare scripts FORCE
1562 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1563%.s: %.S prepare scripts FORCE
1564 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1565%.o: %.S prepare scripts FORCE
1566 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001567%.symtypes: %.c prepare scripts FORCE
1568 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001569
1570# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001571/: prepare scripts FORCE
1572 $(cmd_crmodverdir)
1573 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1574 $(build)=$(build-dir)
1575%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001576 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001577 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001578 $(build)=$(build-dir)
1579%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001580 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001581 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001582 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001583 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001584
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585# FIXME Should go into a make.lib or something
1586# ===========================================================================
1587
1588quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1589 cmd_rmdirs = rm -rf $(rm-dirs)
1590
1591quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1592 cmd_rmfiles = rm -f $(rm-files)
1593
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001594# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001595quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1596 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001597 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001598 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd882009-03-07 13:57:25 +01001599 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001600 $(KERNELRELEASE); \
1601 fi
1602
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001603# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001604# clean it up only when building all modules
1605cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1606 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
Sam Ravnborg222d3942007-10-15 21:59:31 +02001608a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001609 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001610 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
1612quiet_cmd_as_o_S = AS $@
1613cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1614
1615# read all saved command lines
1616
1617targets := $(wildcard $(sort $(targets)))
1618cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1619
1620ifneq ($(cmd_files),)
1621 $(cmd_files): ; # Do not try to update included dependency files
1622 include $(cmd_files)
1623endif
1624
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1626# Usage:
1627# $(Q)$(MAKE) $(clean)=dir
1628clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1629
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630endif # skip-makefile
1631
Paul Smith4f193362006-03-05 17:14:10 -05001632PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001634
Paul Smith4f193362006-03-05 17:14:10 -05001635# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001636# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001637.PHONY: $(PHONY)