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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldscd52d1e2005-11-11 17:43:36 -08003SUBLEVEL = 15
Linus Torvalds88026842006-01-02 19:21:10 -08004EXTRAVERSION =
Linus Torvaldsdf7addb2005-12-18 16:36:54 -08005NAME=Sliding Snow Leopard
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
13# Do not print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
44# Call sparse as part of compilation of C files
45# Use 'make C=1' to enable sparse checking
46
47ifdef C
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
50 endif
51endif
52ifndef KBUILD_CHECKSRC
53 KBUILD_CHECKSRC = 0
54endif
55
56# Use make M=dir to specify directory of external module to build
57# Old syntax make ... SUBDIRS=$PWD is still supported
58# Setting the environment variable KBUILD_EXTMOD take precedence
59ifdef SUBDIRS
60 KBUILD_EXTMOD ?= $(SUBDIRS)
61endif
62ifdef M
63 ifeq ("$(origin M)", "command line")
64 KBUILD_EXTMOD := $(M)
65 endif
66endif
67
68
69# kbuild supports saving output files in a separate directory.
70# To locate output files in a separate directory two syntaxes are supported.
71# In both cases the working directory must be the root of the kernel src.
72# 1) O=
73# Use "make O=dir/to/store/output/files/"
74#
75# 2) Set KBUILD_OUTPUT
76# Set the environment variable KBUILD_OUTPUT to point to the directory
77# where the output files shall be placed.
78# export KBUILD_OUTPUT=dir/to/store/output/files/
79# make
80#
81# The O= assignment takes precedence over the KBUILD_OUTPUT environment
82# variable.
83
84
85# KBUILD_SRC is set on invocation of make in OBJ directory
86# KBUILD_SRC is not intended to be used by the regular user (for now)
87ifeq ($(KBUILD_SRC),)
88
89# OK, Make called in directory where kernel src resides
90# Do we want to locate output files in a separate directory?
91ifdef O
92 ifeq ("$(origin O)", "command line")
93 KBUILD_OUTPUT := $(O)
94 endif
95endif
96
97# That's our default target when none is given on the command line
98.PHONY: _all
99_all:
100
101ifneq ($(KBUILD_OUTPUT),)
102# Invoke a second make in the output directory, passing relevant variables
103# check that the output directory actually exists
104saved-output := $(KBUILD_OUTPUT)
105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106$(if $(KBUILD_OUTPUT),, \
107 $(error output directory "$(saved-output)" does not exist))
108
109.PHONY: $(MAKECMDGOALS)
110
111$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116# Leave processing to above invocation of make
117skip-makefile := 1
118endif # ifneq ($(KBUILD_OUTPUT),)
119endif # ifeq ($(KBUILD_SRC),)
120
121# We process the rest of the Makefile if this is the final invocation of make
122ifeq ($(skip-makefile),)
123
124# If building an external module we do not care about the all: rule
125# but instead _all depend on modules
126.PHONY: all
127ifeq ($(KBUILD_EXTMOD),)
128_all: all
129else
130_all: modules
131endif
132
133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
134TOPDIR := $(srctree)
135# FIXME - TOPDIR is obsolete, use srctree/objtree
136objtree := $(CURDIR)
137src := $(srctree)
138obj := $(objtree)
139
140VPATH := $(srctree)
141
142export srctree objtree VPATH TOPDIR
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145# SUBARCH tells the usermode build what the underlying arch is. That is set
146# first, and if a usermode build is happening, the "ARCH=um" on the command
147# line overrides the setting of ARCH below. If a native build is happening,
148# then ARCH is assigned, getting whatever value it gets normally, and
149# SUBARCH is subsequently ignored.
150
151SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
152 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800153 -e s/s390x/s390/ -e s/parisc64/parisc/ \
154 -e s/ppc64/powerpc/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156# Cross compiling and selecting different set of gcc/bin-utils
157# ---------------------------------------------------------------------------
158#
159# When performing cross compilation for other architectures ARCH shall be set
160# to the target architecture. (See arch/* for the possibilities).
161# ARCH can be set during invocation of make:
162# make ARCH=ia64
163# Another way is to have ARCH set in the environment.
164# The default ARCH is the host where make is executed.
165
166# CROSS_COMPILE specify the prefix used for all executables used
167# during compilation. Only gcc and related bin-utils executables
168# are prefixed with $(CROSS_COMPILE).
169# CROSS_COMPILE can be set on the command line
170# make CROSS_COMPILE=ia64-linux-
171# Alternatively CROSS_COMPILE can be set in the environment.
172# Default value for CROSS_COMPILE is not to prefix executables
173# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
174
175ARCH ?= $(SUBARCH)
176CROSS_COMPILE ?=
177
178# Architecture as present in compile.h
179UTS_MACHINE := $(ARCH)
180
181# SHELL used by kbuild
182CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
183 else if [ -x /bin/bash ]; then echo /bin/bash; \
184 else echo sh; fi ; fi)
185
186HOSTCC = gcc
187HOSTCXX = g++
188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189HOSTCXXFLAGS = -O2
190
191# Decide whether to build built-in, modular, or both.
192# Normally, just do built-in.
193
194KBUILD_MODULES :=
195KBUILD_BUILTIN := 1
196
197# If we have only "make modules", don't compile built-in objects.
198# When we're building modules with modversions, we need to consider
199# the built-in objects during the descend as well, in order to
200# make sure the checksums are uptodate before we record them.
201
202ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204endif
205
206# If we have "make <whatever> modules", compile modules
207# in addition to whatever we do anyway.
208# Just "make" or "make all" shall build modules as well
209
210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
211 KBUILD_MODULES := 1
212endif
213
214ifeq ($(MAKECMDGOALS),)
215 KBUILD_MODULES := 1
216endif
217
Sam Ravnborge579d352005-07-27 08:10:10 +0200218export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
220
221# Beautify output
222# ---------------------------------------------------------------------------
223#
224# Normally, we echo the whole command before executing it. By making
225# that echo $($(quiet)$(cmd)), we now have the possibility to set
226# $(quiet) to choose other forms of output instead, e.g.
227#
228# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
229# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
230#
231# If $(quiet) is empty, the whole command will be printed.
232# If it is set to "quiet_", only the short version will be printed.
233# If it is set to "silent_", nothing wil be printed at all, since
234# the variable $(silent_cmd_cc_o_c) doesn't exist.
235#
Adrian Bunka58a4142006-01-10 00:08:17 +0100236# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# for commands that shall be hidden in non-verbose mode.
238#
239# $(Q)ln $@ :<
240#
241# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
242# If KBUILD_VERBOSE equals 1 then the above command is displayed.
243
244ifeq ($(KBUILD_VERBOSE),1)
245 quiet =
246 Q =
247else
248 quiet=quiet_
249 Q = @
250endif
251
252# If the user is running make -s (silent mode), suppress echoing of
253# commands
254
255ifneq ($(findstring s,$(MAKEFLAGS)),)
256 quiet=silent_
257endif
258
259export quiet Q KBUILD_VERBOSE
260
261######
262# cc support functions to be used (only) in arch/$(ARCH)/Makefile
263# See documentation in Documentation/kbuild/makefiles.txt
264
265# cc-option
Alexey Dobriyanae67cd62005-06-25 14:55:36 -0700266# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
269 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271# cc-option-yn
272# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
273cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
274 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
275
276# cc-option-align
277# Prefix align with either -falign or -malign
278cc-option-align = $(subst -functions=0,,\
279 $(call cc-option,-falign-functions=0,-malign-functions=0))
280
281# cc-version
282# Usage gcc-ver := $(call cc-version $(CC))
283cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
284 $(if $(1), $(1), $(CC)))
285
286
287# Look for make include files relative to root of kernel src
288MAKEFLAGS += --include-dir=$(srctree)
289
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000290# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000291include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293# For maximum performance (+ possibly random breakage, uncomment
294# the following)
295
296#MAKEFLAGS += -rR
297
298# Make variables (CC, etc...)
299
300AS = $(CROSS_COMPILE)as
301LD = $(CROSS_COMPILE)ld
302CC = $(CROSS_COMPILE)gcc
303CPP = $(CC) -E
304AR = $(CROSS_COMPILE)ar
305NM = $(CROSS_COMPILE)nm
306STRIP = $(CROSS_COMPILE)strip
307OBJCOPY = $(CROSS_COMPILE)objcopy
308OBJDUMP = $(CROSS_COMPILE)objdump
309AWK = awk
310GENKSYMS = scripts/genksyms/genksyms
311DEPMOD = /sbin/depmod
312KALLSYMS = scripts/kallsyms
313PERL = perl
314CHECK = sparse
315
Al Viroaf4ca452005-10-21 02:55:38 -0400316CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317MODFLAGS = -DMODULE
318CFLAGS_MODULE = $(MODFLAGS)
319AFLAGS_MODULE = $(MODFLAGS)
320LDFLAGS_MODULE = -r
321CFLAGS_KERNEL =
322AFLAGS_KERNEL =
323
324
325# Use LINUXINCLUDE when you must reference the include/ directory.
326# Needed to be compatible with the O= option
327LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800329 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
331CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
332
Olaf Hering3c521e02005-07-21 21:02:09 +0200333CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 -fno-strict-aliasing -fno-common \
335 -ffreestanding
336AFLAGS := -D__ASSEMBLY__
337
Sam Ravnborgcb584552006-01-09 21:20:34 +0100338# Read KERNELRELEASE from .kernelrelease (if it exists)
339KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
340
Sam Ravnborg4f0210b2006-01-09 22:48:34 +0100341export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
343 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
344 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
345
346export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
347export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
348export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
349
350# When compiling out-of-tree modules, put MODVERDIR in the module
351# tree rather than in the kernel tree. The kernel tree might
352# even be read-only.
353export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355# Files to ignore in find ... statements
356
Trond Myklebust406119f2005-10-27 14:46:53 -0400357RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
358export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360# ===========================================================================
361# Rules shared between *config targets and build targets
362
363# Basic helpers built in scripts/
364.PHONY: scripts_basic
365scripts_basic:
366 $(Q)$(MAKE) $(build)=scripts/basic
367
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200368# To avoid any implicit rule to kick in, define an empty command.
369scripts/basic/%: scripts_basic ;
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371.PHONY: outputmakefile
372# outputmakefile generate a Makefile to be placed in output directory, if
373# using a seperate output directory. This allows convinient use
374# of make in output directory
375outputmakefile:
376 $(Q)if test ! $(srctree) -ef $(objtree); then \
377 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
378 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
379 > $(objtree)/Makefile; \
380 echo ' GEN $(objtree)/Makefile'; \
381 fi
382
383# To make sure we do not include .config for any of the *config targets
384# catch them early, and hand them over to scripts/kconfig/Makefile
385# It is allowed to specify more targets when calling make, including
386# mixing *config targets and build targets.
387# For example 'make oldconfig all'.
388# Detect when mixed targets is specified, and make a second invocation
389# of make so .config is not included in this case either (for *config).
390
391no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800392 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394config-targets := 0
395mixed-targets := 0
396dot-config := 1
397
398ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
399 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 dot-config := 0
401 endif
402endif
403
404ifeq ($(KBUILD_EXTMOD),)
405 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
406 config-targets := 1
407 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
408 mixed-targets := 1
409 endif
410 endif
411endif
412
413ifeq ($(mixed-targets),1)
414# ===========================================================================
415# We're called with mixed targets (*config and build targets).
416# Handle them one by one.
417
418%:: FORCE
419 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
420
421else
422ifeq ($(config-targets),1)
423# ===========================================================================
424# *config targets only - make sure prerequisites are updated, and descend
425# in scripts/kconfig to make the *config target
426
427# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
428# KBUILD_DEFCONFIG may point out an alternative default configuration
429# used for 'make defconfig'
430include $(srctree)/arch/$(ARCH)/Makefile
431export KBUILD_DEFCONFIG
432
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200433config %config: scripts_basic outputmakefile FORCE
434 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 $(Q)$(MAKE) $(build)=scripts/kconfig $@
436
437else
438# ===========================================================================
439# Build targets only - this includes vmlinux, arch specific targets, clean
440# targets and others. In general all targets except *config targets.
441
442ifeq ($(KBUILD_EXTMOD),)
443# Additional helpers built in scripts/
444# Carefully list dependencies so we do not try to build scripts twice
445# in parrallel
446.PHONY: scripts
447scripts: scripts_basic include/config/MARKER
448 $(Q)$(MAKE) $(build)=$(@)
449
450scripts_basic: include/linux/autoconf.h
451
452# Objects we will link into vmlinux / subdirs we need to visit
453init-y := init/
454drivers-y := drivers/ sound/
455net-y := net/
456libs-y := lib/
457core-y := usr/
458endif # KBUILD_EXTMOD
459
460ifeq ($(dot-config),1)
461# In this section, we need .config
462
463# Read in dependencies to all Kconfig* files, make sure to run
464# oldconfig if changes are detected.
Sam Ravnborg752625c2005-12-26 23:34:03 +0100465-include .kconfig.d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
467include .config
468
469# If .config needs to be updated, it will be done via the dependency
470# that autoconf has on .config.
471# To avoid any implicit rule to kick in, define an empty command
Sam Ravnborg752625c2005-12-26 23:34:03 +0100472.config .kconfig.d: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474# If .config is newer than include/linux/autoconf.h, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100475# with it and forgot to run make oldconfig.
476# If kconfig.d is missing then we are probarly in a cleaned tree so
477# we execute the config step to be sure to catch updated Kconfig files
478include/linux/autoconf.h: .kconfig.d .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200479 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
481else
482# Dummy target needed, because used as prerequisite
483include/linux/autoconf.h: ;
484endif
485
486# The all: target is the default when no target is given on the
487# command line.
488# This allow a user to issue only 'make' to build a kernel including modules
489# Defaults vmlinux but it is usually overriden in the arch makefile
490all: vmlinux
491
492ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
493CFLAGS += -Os
494else
495CFLAGS += -O2
496endif
497
498#Add align options if CONFIG_CC_* is not equal to 0
499add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
500CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
501CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
502CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
503CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
504
505ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700506CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507else
508CFLAGS += -fomit-frame-pointer
509endif
510
511ifdef CONFIG_DEBUG_INFO
512CFLAGS += -g
513endif
514
515include $(srctree)/arch/$(ARCH)/Makefile
516
Sam Ravnborge8e69932005-04-30 16:51:42 -0700517# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700518NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700519CHECKFLAGS += $(NOSTDINC_FLAGS)
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521# warn about C99 declaration after statement
522CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
523
524# disable pointer signedness warnings in gcc 4.0
525CFLAGS += $(call cc-option,-Wno-pointer-sign,)
526
527# Default kernel image to build when no specific target is given.
528# KBUILD_IMAGE may be overruled on the commandline or
529# set in the environment
530# Also any assignments in arch/$(ARCH)/Makefile take precedence over
531# this default value
532export KBUILD_IMAGE ?= vmlinux
533
534#
535# INSTALL_PATH specifies where to place the updated kernel and system map
536# images. Default is /boot, but you can set it to other values
537export INSTALL_PATH ?= /boot
538
539#
540# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
541# relocations required by build roots. This is not defined in the
542# makefile but the arguement can be passed to make if needed.
543#
544
545MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
546export MODLIB
547
548
549ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100550core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
553 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
554 $(net-y) $(net-m) $(libs-y) $(libs-m)))
555
556vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
557 $(init-n) $(init-) \
558 $(core-n) $(core-) $(drivers-n) $(drivers-) \
559 $(net-n) $(net-) $(libs-n) $(libs-))))
560
561init-y := $(patsubst %/, %/built-in.o, $(init-y))
562core-y := $(patsubst %/, %/built-in.o, $(core-y))
563drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
564net-y := $(patsubst %/, %/built-in.o, $(net-y))
565libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
566libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
567libs-y := $(libs-y1) $(libs-y2)
568
569# Build vmlinux
570# ---------------------------------------------------------------------------
571# vmlinux is build from the objects selected by $(vmlinux-init) and
572# $(vmlinux-main). Most are built-in.o files from top-level directories
573# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
574# Ordering when linking is important, and $(vmlinux-init) must be first.
575#
576# vmlinux
577# ^
578# |
579# +-< $(vmlinux-init)
580# | +--< init/version.o + more
581# |
582# +--< $(vmlinux-main)
583# | +--< driver/built-in.o mm/built-in.o + more
584# |
585# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
586#
587# vmlinux version (uname -v) cannot be updated during normal
588# descending-into-subdirs phase since we do not yet know if we need to
589# update vmlinux.
590# Therefore this step is delayed until just before final link of vmlinux -
591# except in the kallsyms case where it is done just before adding the
592# symbols to the kernel.
593#
594# System.map is generated to document addresses of all kernel symbols
595
596vmlinux-init := $(head-y) $(init-y)
597vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
598vmlinux-all := $(vmlinux-init) $(vmlinux-main)
599vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
600
601# Rule to link vmlinux - also used during CONFIG_KALLSYMS
602# May be overridden by arch/$(ARCH)/Makefile
603quiet_cmd_vmlinux__ ?= LD $@
604 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
605 -T $(vmlinux-lds) $(vmlinux-init) \
606 --start-group $(vmlinux-main) --end-group \
607 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
608
609# Generate new vmlinux version
610quiet_cmd_vmlinux_version = GEN .version
611 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200612 if [ ! -r .version ]; then \
613 rm -f .version; \
614 echo 1 >.version; \
615 else \
616 mv .version .old_version; \
617 expr 0$$(cat .old_version) + 1 >.version; \
618 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 $(MAKE) $(build)=init
620
621# Generate System.map
622quiet_cmd_sysmap = SYSMAP
623 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
624
625# Link of vmlinux
626# If CONFIG_KALLSYMS is set .version is already updated
627# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700628# Use + in front of the vmlinux_version rule to silent warning with make -j2
629# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700631 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
633
634 $(call cmd,vmlinux__)
635 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
636
637 $(Q)$(if $($(quiet)cmd_sysmap), \
638 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
639 $(cmd_sysmap) $@ System.map; \
640 if [ $$? -ne 0 ]; then \
641 rm -f $@; \
642 /bin/false; \
643 fi;
644 $(verify_kallsyms)
645endef
646
647
648ifdef CONFIG_KALLSYMS
649# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
650# It's a three stage process:
651# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
652# empty
653# Running kallsyms on that gives us .tmp_kallsyms1.o with
654# the right size - vmlinux version (uname -v) is updated during this step
655# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
656# but due to the added section, some addresses have shifted.
657# From here, we generate a correct .tmp_kallsyms2.o
658# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
659# o Verify that the System.map from vmlinux matches the map from
660# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
661# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
662# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
663# temporary bypass to allow the kernel to be built while the
664# maintainers work out what went wrong with kallsyms.
665
666ifdef CONFIG_KALLSYMS_EXTRA_PASS
667last_kallsyms := 3
668else
669last_kallsyms := 2
670endif
671
672kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
673
674define verify_kallsyms
675 $(Q)$(if $($(quiet)cmd_sysmap), \
676 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
677 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
678 $(Q)cmp -s System.map .tmp_System.map || \
679 (echo Inconsistent kallsyms data; \
680 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
681 rm .tmp_kallsyms* ; /bin/false )
682endef
683
684# Update vmlinux version before link
685# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200686# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687cmd_ksym_ld = $(cmd_vmlinux__)
688define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200689 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 +$(call cmd,vmlinux_version)
691 $(call cmd,vmlinux__)
692 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
693endef
694
695# Generate .S file with all kernel symbols
696quiet_cmd_kallsyms = KSYM $@
697 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
698 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
699
700.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
701 $(call if_changed_dep,as_o_S)
702
703.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
704 $(call cmd,kallsyms)
705
706# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
707.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
708 $(call if_changed_rule,ksym_ld)
709
710.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
711 $(call if_changed,vmlinux__)
712
713.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
714 $(call if_changed,vmlinux__)
715
716# Needs to visit scripts/ before $(KALLSYMS) can be used.
717$(KALLSYMS): scripts ;
718
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000719# Generate some data for debugging strange kallsyms problems
720debug_kallsyms: .tmp_map$(last_kallsyms)
721
722.tmp_map%: .tmp_vmlinux% FORCE
723 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
724
725.tmp_map3: .tmp_map2
726
727.tmp_map2: .tmp_map1
728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729endif # ifdef CONFIG_KALLSYMS
730
731# vmlinux image - including updated kernel symbols
732vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
733 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200734 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736# The actual objects are generated when descending,
737# make sure no implicit rule kicks in
738$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
739
740# Handle descending into subdirectories listed in $(vmlinux-dirs)
741# Preset locale variables to speed up the build process. Limit locale
742# tweaks to this spot to avoid wrong language settings when running
743# make menuconfig etc.
744# Error messages still appears in the original language
745
746.PHONY: $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200747$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 $(Q)$(MAKE) $(build)=$@
749
Sam Ravnborgcb584552006-01-09 21:20:34 +0100750# Build the kernel release string
751# The KERNELRELEASE is stored in a file named .kernelrelease
752# to be used when executing for example make install or make modules_install
753#
754# Take the contents of any files called localversion* and the config
755# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
756# LOCALVERSION from the command line override all of this
757
758nullstring :=
759space := $(nullstring) # end of line
760
761___localver = $(objtree)/localversion* $(srctree)/localversion*
762__localver = $(sort $(wildcard $(___localver)))
763# skip backup files (containing '~')
764_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
765
766localver = $(subst $(space),, \
767 $(shell cat /dev/null $(_localver)) \
768 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
769
770# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
771# and if the SCM is know a tag from the SCM is appended.
772# The appended tag is determinded by the SCM used.
773#
774# Currently, only git is supported.
775# Other SCMs can edit scripts/setlocalversion and add the appropriate
776# checks as needed.
777ifdef CONFIG_LOCALVERSION_AUTO
778 _localver-auto = $(shell $(CONFIG_SHELL) \
779 $(srctree)/scripts/setlocalversion $(srctree))
780 localver-auto = $(LOCALVERSION)$(_localver-auto)
781endif
782
783localver-full = $(localver)$(localver-auto)
784
785# Store (new) KERNELRELASE string in .kernelrelease
786kernelrelease = \
787 $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(localver-full)
788.kernelrelease: FORCE
789 $(Q)rm -f .kernelrelease
790 $(Q)echo $(kernelrelease) > .kernelrelease
791 $(Q)echo " Building kernel $(kernelrelease)"
792
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200795# or the modules are listed in "prepare".
796# A multi level approach is used. prepareN is processed before prepareN-1.
797# archprepare is used in arch Makefiles and when processed asm symlink,
798# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200800# Listed in dependency order
801.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
802
803# prepare-all is deprecated, use prepare as valid replacement
804.PHONY: prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200806# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807# and if so do:
808# 1) Check that make has not been executed in the kernel src $(srctree)
809# 2) Create the include2 directory, used for the second asm symlink
Sam Ravnborgcb584552006-01-09 21:20:34 +0100810prepare3: .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811ifneq ($(KBUILD_SRC),)
812 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000813 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 echo " $(srctree) is not clean, please run 'make mrproper'";\
815 echo " in the '$(srctree)' directory.";\
816 /bin/false; \
817 fi;
818 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
819 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
820endif
821
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200822# prepare2 creates a makefile if using a separate output directory
823prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200825prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000826 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827ifneq ($(KBUILD_MODULES),)
828 $(Q)rm -rf $(MODVERDIR)
829 $(Q)mkdir -p $(MODVERDIR)
830endif
831
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200832archprepare: prepare1 scripts_basic
833
834prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200835 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200838prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840# Leave this as default for preprocessing vmlinux.lds.S, which is now
841# done in arch/$(ARCH)/kernel/Makefile
842
843export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
844
845# Single targets
846# ---------------------------------------------------------------------------
847
848%.s: %.c scripts FORCE
849 $(Q)$(MAKE) $(build)=$(@D) $@
850%.i: %.c scripts FORCE
851 $(Q)$(MAKE) $(build)=$(@D) $@
852%.o: %.c scripts FORCE
853 $(Q)$(MAKE) $(build)=$(@D) $@
Sam Ravnborg155ad602005-07-07 17:56:08 -0700854%.ko: scripts FORCE
855 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
856 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857%/: scripts prepare FORCE
858 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
859%.lst: %.c scripts FORCE
860 $(Q)$(MAKE) $(build)=$(@D) $@
861%.s: %.S scripts FORCE
862 $(Q)$(MAKE) $(build)=$(@D) $@
863%.o: %.S scripts FORCE
864 $(Q)$(MAKE) $(build)=$(@D) $@
865
866# FIXME: The asm symlink changes when $(ARCH) changes. That's
867# hard to detect, but I suppose "make mrproper" is a good idea
868# before switching between archs anyway.
869
870include/asm:
871 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
872 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
873 @ln -fsn asm-$(ARCH) $@
874
875# Split autoconf.h into include/linux/config/*
876
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200877include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
879 @scripts/basic/split-include include/linux/autoconf.h include/config
880 @touch $@
881
882# Generate some files
883# ---------------------------------------------------------------------------
884
885# KERNELRELEASE can change from a few different places, meaning version.h
886# needs to be updated, so this check is forced on all builds
887
888uts_len := 64
889
890define filechk_version.h
891 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
892 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
893 exit 1; \
894 fi; \
895 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
896 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
897 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
898 )
899endef
900
901include/linux/version.h: $(srctree)/Makefile FORCE
902 $(call filechk,version.h)
903
904# ---------------------------------------------------------------------------
905
906.PHONY: depend dep
907depend dep:
908 @echo '*** Warning: make $@ is unnecessary now.'
909
910# ---------------------------------------------------------------------------
911# Modules
912
913ifdef CONFIG_MODULES
914
915# By default, build modules as well
916
917all: modules
918
919# Build modules
920
921.PHONY: modules
922modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
923 @echo ' Building modules, stage 2.';
924 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
925
926
927# Target to prepare building external modules
928.PHONY: modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200929modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931# Target to install modules
932.PHONY: modules_install
933modules_install: _modinst_ _modinst_post
934
935.PHONY: _modinst_
936_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700937 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 echo "Warning: you may need to install module-init-tools"; \
939 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
940 sleep 1; \
941 fi
942 @rm -rf $(MODLIB)/kernel
943 @rm -f $(MODLIB)/source
944 @mkdir -p $(MODLIB)/kernel
945 @ln -s $(srctree) $(MODLIB)/source
946 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
947 rm -f $(MODLIB)/build ; \
948 ln -s $(objtree) $(MODLIB)/build ; \
949 fi
950 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
951
952# If System.map exists, run depmod. This deliberately does not have a
953# dependency on System.map since that would run the dependency tree on
954# vmlinux. This depmod is only for convenience to give the initial
955# boot a modules.dep even before / is mounted read-write. However the
956# boot script depmod is the master version.
957ifeq "$(strip $(INSTALL_MOD_PATH))" ""
958depmod_opts :=
959else
960depmod_opts := -b $(INSTALL_MOD_PATH) -r
961endif
962.PHONY: _modinst_post
963_modinst_post: _modinst_
964 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
965
966else # CONFIG_MODULES
967
968# Modules not configured
969# ---------------------------------------------------------------------------
970
971modules modules_install: FORCE
972 @echo
973 @echo "The present kernel configuration has modules disabled."
974 @echo "Type 'make config' and enable loadable module support."
975 @echo "Then build a kernel with module support enabled."
976 @echo
977 @exit 1
978
979endif # CONFIG_MODULES
980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981###
982# Cleaning is done on three levels.
983# make clean Delete most generated files
984# Leave enough to build external modules
985# make mrproper Delete the current configuration, and all generated files
986# make distclean Remove editor backup files, patch leftover files and the like
987
988# Directories & files removed with 'make clean'
989CLEAN_DIRS += $(MODVERDIR)
990CLEAN_FILES += vmlinux System.map \
991 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
992
993# Directories & files removed with 'make mrproper'
994MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +0100995MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 include/linux/autoconf.h include/linux/version.h \
Sam Ravnborgcb584552006-01-09 21:20:34 +0100997 .kernelrelease Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999# clean - Delete most, but leave enough to build external modules
1000#
1001clean: rm-dirs := $(CLEAN_DIRS)
1002clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001003clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005.PHONY: $(clean-dirs) clean archclean
1006$(clean-dirs):
1007 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1008
1009clean: archclean $(clean-dirs)
1010 $(call cmd,rmdirs)
1011 $(call cmd,rmfiles)
1012 @find . $(RCS_FIND_IGNORE) \
1013 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1014 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1015 -type f -print | xargs rm -f
1016
1017# mrproper - Delete all generated files, including .config
1018#
1019mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1020mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1021mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1022
1023.PHONY: $(mrproper-dirs) mrproper archmrproper
1024$(mrproper-dirs):
1025 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1026
1027mrproper: clean archmrproper $(mrproper-dirs)
1028 $(call cmd,rmdirs)
1029 $(call cmd,rmfiles)
1030
1031# distclean
1032#
1033.PHONY: distclean
1034
1035distclean: mrproper
1036 @find $(srctree) $(RCS_FIND_IGNORE) \
1037 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1038 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1039 -o -name '.*.rej' -o -size 0 \
1040 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1041 -type f -print | xargs rm -f
1042
1043
1044# Packaging of the kernel to various formats
1045# ---------------------------------------------------------------------------
1046# rpm target kept for backward compatibility
1047package-dir := $(srctree)/scripts/package
1048
1049.PHONY: %-pkg rpm
1050
1051%pkg: FORCE
1052 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1053rpm: FORCE
1054 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1055
1056
1057# Brief documentation of the typical targets used
1058# ---------------------------------------------------------------------------
1059
1060boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1061boards := $(notdir $(boards))
1062
1063help:
1064 @echo 'Cleaning targets:'
1065 @echo ' clean - remove most generated files but keep the config'
1066 @echo ' mrproper - remove all generated files + config + various backup files'
1067 @echo ''
1068 @echo 'Configuration targets:'
1069 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1070 @echo ''
1071 @echo 'Other generic targets:'
1072 @echo ' all - Build all targets marked with [*]'
1073 @echo '* vmlinux - Build the bare kernel'
1074 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001075 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 @echo ' dir/ - Build all files in dir and below'
1077 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001078 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 @echo ' rpm - Build a kernel as an RPM package'
1080 @echo ' tags/TAGS - Generate tags file for editors'
1081 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001082 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001083 @echo ' kernelversion - Output the version stored in Makefile'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 @echo ''
1085 @echo 'Static analysers'
1086 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1087 @echo ' and init sections from non-init sections'
1088 @echo ' checkstack - Generate a list of stack hogs'
1089 @echo ' namespacecheck - Name space analysis on compiled kernel'
1090 @echo ''
1091 @echo 'Kernel packaging:'
1092 @$(MAKE) -f $(package-dir)/Makefile help
1093 @echo ''
1094 @echo 'Documentation targets:'
1095 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1096 @echo ''
1097 @echo 'Architecture specific targets ($(ARCH)):'
1098 @$(if $(archhelp),$(archhelp),\
1099 echo ' No architecture specific help defined for $(ARCH)')
1100 @echo ''
1101 @$(if $(boards), \
1102 $(foreach b, $(boards), \
1103 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1104 echo '')
1105
1106 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1107 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1108 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1109 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1110 @echo ''
1111 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1112 @echo 'For further info see the ./README file'
1113
1114
1115# Documentation targets
1116# ---------------------------------------------------------------------------
1117%docs: scripts_basic FORCE
1118 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1119
1120else # KBUILD_EXTMOD
1121
1122###
1123# External module support.
1124# When building external modules the kernel used as basis is considered
1125# read-only, and no consistency checks are made and the make
1126# system is not used on the basis kernel. If updates are required
1127# in the basis kernel ordinary make commands (without M=...) must
1128# be used.
1129#
1130# The following are the only valid targets when building external
1131# modules.
1132# make M=dir clean Delete all automatically generated files
1133# make M=dir modules Make all modules in specified dir
1134# make M=dir Same as 'make M=dir modules'
1135# make M=dir modules_install
1136# Install the modules build in the module directory
1137# Assumes install directory is already created
1138
1139# We are always building modules
1140KBUILD_MODULES := 1
1141.PHONY: crmodverdir
1142crmodverdir:
1143 $(Q)mkdir -p $(MODVERDIR)
1144
1145.PHONY: $(objtree)/Module.symvers
1146$(objtree)/Module.symvers:
1147 @test -e $(objtree)/Module.symvers || ( \
1148 echo; \
1149 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1150 echo " is missing; modules will have no dependencies and modversions."; \
1151 echo )
1152
1153module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1154.PHONY: $(module-dirs) modules
1155$(module-dirs): crmodverdir $(objtree)/Module.symvers
1156 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1157
1158modules: $(module-dirs)
1159 @echo ' Building modules, stage 2.';
1160 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1161
1162.PHONY: modules_install
1163modules_install:
1164 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1165
1166clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1167
1168.PHONY: $(clean-dirs) clean
1169$(clean-dirs):
1170 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1171
1172clean: rm-dirs := $(MODVERDIR)
1173clean: $(clean-dirs)
1174 $(call cmd,rmdirs)
1175 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1176 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1177 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1178 -type f -print | xargs rm -f
1179
1180help:
1181 @echo ' Building external modules.'
1182 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1183 @echo ''
1184 @echo ' modules - default target, build the module(s)'
1185 @echo ' modules_install - install the module'
1186 @echo ' clean - remove generated files in module directory only'
1187 @echo ''
1188endif # KBUILD_EXTMOD
1189
1190# Generate tags for editors
1191# ---------------------------------------------------------------------------
1192
1193#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1194#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1195#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1196
George Anzingerf182ae62005-07-07 17:56:06 -07001197ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198__srctree =
1199else
1200__srctree = $(srctree)/
1201endif
1202
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001203ifeq ($(ALLSOURCE_ARCHS),)
1204ifeq ($(ARCH),um)
1205ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1206else
1207ALLINCLUDE_ARCHS := $(ARCH)
1208endif
1209else
1210#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1211ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1212endif
1213
Ian Campbella0674e82005-06-23 11:25:54 +01001214ALLSOURCE_ARCHS := $(ARCH)
1215
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216define all-sources
1217 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1218 \( -name include -o -name arch \) -prune -o \
1219 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001220 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1221 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1222 -name '*.[chS]' -print; \
1223 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1225 -name '*.[chS]' -print; \
1226 find $(__srctree)include $(RCS_FIND_IGNORE) \
1227 \( -name config -o -name 'asm-*' \) -prune \
1228 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001229 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001230 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1231 -name '*.[chS]' -print; \
1232 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1234 -name '*.[chS]' -print )
1235endef
1236
1237quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001238 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
1240quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001241 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243cscope: FORCE
1244 $(call cmd,cscope-file)
1245 $(call cmd,cscope)
1246
1247quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001248define cmd_TAGS
1249 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001250 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1251 echo "-I __initdata,__exitdata,__acquires,__releases \
1252 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1253 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001254 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001255endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001257TAGS: FORCE
1258 $(call cmd,TAGS)
1259
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261quiet_cmd_tags = MAKE $@
1262define cmd_tags
1263 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001264 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1265 echo "-I __initdata,__exitdata,__acquires,__releases \
1266 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1267 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001268 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269endef
1270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271tags: FORCE
1272 $(call cmd,tags)
1273
1274
1275# Scripts to check various things for consistency
1276# ---------------------------------------------------------------------------
1277
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278includecheck:
1279 find * $(RCS_FIND_IGNORE) \
1280 -name '*.[hcS]' -type f -print | sort \
1281 | xargs $(PERL) -w scripts/checkincludes.pl
1282
1283versioncheck:
1284 find * $(RCS_FIND_IGNORE) \
1285 -name '*.[hcS]' -type f -print | sort \
1286 | xargs $(PERL) -w scripts/checkversion.pl
1287
1288buildcheck:
1289 $(PERL) $(srctree)/scripts/reference_discarded.pl
1290 $(PERL) $(srctree)/scripts/reference_init.pl
1291
1292namespacecheck:
1293 $(PERL) $(srctree)/scripts/namespace.pl
1294
1295endif #ifeq ($(config-targets),1)
1296endif #ifeq ($(mixed-targets),1)
1297
1298.PHONY: checkstack
1299checkstack:
1300 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1301 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1302
1303kernelrelease:
1304 @echo $(KERNELRELEASE)
Sam Ravnborgcb584552006-01-09 21:20:34 +01001305kernelversion:
1306 @echo $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307
1308# FIXME Should go into a make.lib or something
1309# ===========================================================================
1310
1311quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1312 cmd_rmdirs = rm -rf $(rm-dirs)
1313
1314quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1315 cmd_rmfiles = rm -f $(rm-files)
1316
1317
1318a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1319 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1320 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1321
1322quiet_cmd_as_o_S = AS $@
1323cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1324
1325# read all saved command lines
1326
1327targets := $(wildcard $(sort $(targets)))
1328cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1329
1330ifneq ($(cmd_files),)
1331 $(cmd_files): ; # Do not try to update included dependency files
1332 include $(cmd_files)
1333endif
1334
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1336# Usage:
1337# $(Q)$(MAKE) $(clean)=dir
1338clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340endif # skip-makefile
1341
1342FORCE: