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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
144nullstring :=
145space := $(nullstring) # end of line
146
147# Take the contents of any files called localversion* and the config
148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
149# careful not to include files twice if building in the source
150# directory. LOCALVERSION from the command line override all of this
151
152localver := $(objtree)/localversion* $(srctree)/localversion*
153localver := $(sort $(wildcard $(localver)))
154# skip backup files (containing '~')
155localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
156
157LOCALVERSION = $(subst $(space),, \
158 $(shell cat /dev/null $(localver)) \
159 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
160
161KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
162
163# SUBARCH tells the usermode build what the underlying arch is. That is set
164# first, and if a usermode build is happening, the "ARCH=um" on the command
165# line overrides the setting of ARCH below. If a native build is happening,
166# then ARCH is assigned, getting whatever value it gets normally, and
167# SUBARCH is subsequently ignored.
168
169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
172 -e s/ppc64/powerpc/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
192
193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
197UTS_MACHINE := $(ARCH)
198
199# SHELL used by kbuild
200CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
201 else if [ -x /bin/bash ]; then echo /bin/bash; \
202 else echo sh; fi ; fi)
203
204HOSTCC = gcc
205HOSTCXX = g++
206HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
207HOSTCXXFLAGS = -O2
208
209# Decide whether to build built-in, modular, or both.
210# Normally, just do built-in.
211
212KBUILD_MODULES :=
213KBUILD_BUILTIN := 1
214
215# If we have only "make modules", don't compile built-in objects.
216# When we're building modules with modversions, we need to consider
217# the built-in objects during the descend as well, in order to
218# make sure the checksums are uptodate before we record them.
219
220ifeq ($(MAKECMDGOALS),modules)
221 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
222endif
223
224# If we have "make <whatever> modules", compile modules
225# in addition to whatever we do anyway.
226# Just "make" or "make all" shall build modules as well
227
228ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
229 KBUILD_MODULES := 1
230endif
231
232ifeq ($(MAKECMDGOALS),)
233 KBUILD_MODULES := 1
234endif
235
Sam Ravnborge579d352005-07-27 08:10:10 +0200236export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
238
239# Beautify output
240# ---------------------------------------------------------------------------
241#
242# Normally, we echo the whole command before executing it. By making
243# that echo $($(quiet)$(cmd)), we now have the possibility to set
244# $(quiet) to choose other forms of output instead, e.g.
245#
246# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
247# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
248#
249# If $(quiet) is empty, the whole command will be printed.
250# If it is set to "quiet_", only the short version will be printed.
251# If it is set to "silent_", nothing wil be printed at all, since
252# the variable $(silent_cmd_cc_o_c) doesn't exist.
253#
Adrian Bunka58a4142006-01-10 00:08:17 +0100254# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255# for commands that shall be hidden in non-verbose mode.
256#
257# $(Q)ln $@ :<
258#
259# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
260# If KBUILD_VERBOSE equals 1 then the above command is displayed.
261
262ifeq ($(KBUILD_VERBOSE),1)
263 quiet =
264 Q =
265else
266 quiet=quiet_
267 Q = @
268endif
269
270# If the user is running make -s (silent mode), suppress echoing of
271# commands
272
273ifneq ($(findstring s,$(MAKEFLAGS)),)
274 quiet=silent_
275endif
276
277export quiet Q KBUILD_VERBOSE
278
279######
280# cc support functions to be used (only) in arch/$(ARCH)/Makefile
281# See documentation in Documentation/kbuild/makefiles.txt
282
283# cc-option
Alexey Dobriyanae67cd62005-06-25 14:55:36 -0700284# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
287 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289# cc-option-yn
290# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
291cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
292 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
293
294# cc-option-align
295# Prefix align with either -falign or -malign
296cc-option-align = $(subst -functions=0,,\
297 $(call cc-option,-falign-functions=0,-malign-functions=0))
298
299# cc-version
300# Usage gcc-ver := $(call cc-version $(CC))
301cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
302 $(if $(1), $(1), $(CC)))
303
304
305# Look for make include files relative to root of kernel src
306MAKEFLAGS += --include-dir=$(srctree)
307
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000308# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000309include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311# For maximum performance (+ possibly random breakage, uncomment
312# the following)
313
314#MAKEFLAGS += -rR
315
316# Make variables (CC, etc...)
317
318AS = $(CROSS_COMPILE)as
319LD = $(CROSS_COMPILE)ld
320CC = $(CROSS_COMPILE)gcc
321CPP = $(CC) -E
322AR = $(CROSS_COMPILE)ar
323NM = $(CROSS_COMPILE)nm
324STRIP = $(CROSS_COMPILE)strip
325OBJCOPY = $(CROSS_COMPILE)objcopy
326OBJDUMP = $(CROSS_COMPILE)objdump
327AWK = awk
328GENKSYMS = scripts/genksyms/genksyms
329DEPMOD = /sbin/depmod
330KALLSYMS = scripts/kallsyms
331PERL = perl
332CHECK = sparse
333
Al Viroaf4ca452005-10-21 02:55:38 -0400334CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335MODFLAGS = -DMODULE
336CFLAGS_MODULE = $(MODFLAGS)
337AFLAGS_MODULE = $(MODFLAGS)
338LDFLAGS_MODULE = -r
339CFLAGS_KERNEL =
340AFLAGS_KERNEL =
341
342
343# Use LINUXINCLUDE when you must reference the include/ directory.
344# Needed to be compatible with the O= option
345LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100346 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800347 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
350
Olaf Hering3c521e02005-07-21 21:02:09 +0200351CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 -fno-strict-aliasing -fno-common \
353 -ffreestanding
354AFLAGS := -D__ASSEMBLY__
355
356export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
357 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
358 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
359 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
360
361export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
362export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
363export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
364
365# When compiling out-of-tree modules, put MODVERDIR in the module
366# tree rather than in the kernel tree. The kernel tree might
367# even be read-only.
368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370# Files to ignore in find ... statements
371
Trond Myklebust406119f2005-10-27 14:46:53 -0400372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375# ===========================================================================
376# Rules shared between *config targets and build targets
377
378# Basic helpers built in scripts/
379.PHONY: scripts_basic
380scripts_basic:
381 $(Q)$(MAKE) $(build)=scripts/basic
382
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200383# To avoid any implicit rule to kick in, define an empty command.
384scripts/basic/%: scripts_basic ;
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386.PHONY: outputmakefile
387# outputmakefile generate a Makefile to be placed in output directory, if
388# using a seperate output directory. This allows convinient use
389# of make in output directory
390outputmakefile:
391 $(Q)if test ! $(srctree) -ef $(objtree); then \
392 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
393 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
394 > $(objtree)/Makefile; \
395 echo ' GEN $(objtree)/Makefile'; \
396 fi
397
398# To make sure we do not include .config for any of the *config targets
399# catch them early, and hand them over to scripts/kconfig/Makefile
400# It is allowed to specify more targets when calling make, including
401# mixing *config targets and build targets.
402# For example 'make oldconfig all'.
403# Detect when mixed targets is specified, and make a second invocation
404# of make so .config is not included in this case either (for *config).
405
406no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800407 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409config-targets := 0
410mixed-targets := 0
411dot-config := 1
412
413ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 dot-config := 0
416 endif
417endif
418
419ifeq ($(KBUILD_EXTMOD),)
420 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
421 config-targets := 1
422 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
423 mixed-targets := 1
424 endif
425 endif
426endif
427
428ifeq ($(mixed-targets),1)
429# ===========================================================================
430# We're called with mixed targets (*config and build targets).
431# Handle them one by one.
432
433%:: FORCE
434 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
435
436else
437ifeq ($(config-targets),1)
438# ===========================================================================
439# *config targets only - make sure prerequisites are updated, and descend
440# in scripts/kconfig to make the *config target
441
442# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
443# KBUILD_DEFCONFIG may point out an alternative default configuration
444# used for 'make defconfig'
445include $(srctree)/arch/$(ARCH)/Makefile
446export KBUILD_DEFCONFIG
447
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200448config %config: scripts_basic outputmakefile FORCE
449 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 $(Q)$(MAKE) $(build)=scripts/kconfig $@
451
452else
453# ===========================================================================
454# Build targets only - this includes vmlinux, arch specific targets, clean
455# targets and others. In general all targets except *config targets.
456
457ifeq ($(KBUILD_EXTMOD),)
458# Additional helpers built in scripts/
459# Carefully list dependencies so we do not try to build scripts twice
460# in parrallel
461.PHONY: scripts
462scripts: scripts_basic include/config/MARKER
463 $(Q)$(MAKE) $(build)=$(@)
464
465scripts_basic: include/linux/autoconf.h
466
467# Objects we will link into vmlinux / subdirs we need to visit
468init-y := init/
469drivers-y := drivers/ sound/
470net-y := net/
471libs-y := lib/
472core-y := usr/
473endif # KBUILD_EXTMOD
474
475ifeq ($(dot-config),1)
476# In this section, we need .config
477
478# Read in dependencies to all Kconfig* files, make sure to run
479# oldconfig if changes are detected.
Sam Ravnborg752625c2005-12-26 23:34:03 +0100480-include .kconfig.d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482include .config
483
484# If .config needs to be updated, it will be done via the dependency
485# that autoconf has on .config.
486# To avoid any implicit rule to kick in, define an empty command
Sam Ravnborg752625c2005-12-26 23:34:03 +0100487.config .kconfig.d: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489# If .config is newer than include/linux/autoconf.h, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100490# with it and forgot to run make oldconfig.
491# If kconfig.d is missing then we are probarly in a cleaned tree so
492# we execute the config step to be sure to catch updated Kconfig files
493include/linux/autoconf.h: .kconfig.d .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200494 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
496else
497# Dummy target needed, because used as prerequisite
498include/linux/autoconf.h: ;
499endif
500
501# The all: target is the default when no target is given on the
502# command line.
503# This allow a user to issue only 'make' to build a kernel including modules
504# Defaults vmlinux but it is usually overriden in the arch makefile
505all: vmlinux
506
507ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
508CFLAGS += -Os
509else
510CFLAGS += -O2
511endif
512
513#Add align options if CONFIG_CC_* is not equal to 0
514add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
515CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
519
520ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700521CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522else
523CFLAGS += -fomit-frame-pointer
524endif
525
526ifdef CONFIG_DEBUG_INFO
527CFLAGS += -g
528endif
529
530include $(srctree)/arch/$(ARCH)/Makefile
531
Sam Ravnborge8e69932005-04-30 16:51:42 -0700532# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700533NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700534CHECKFLAGS += $(NOSTDINC_FLAGS)
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536# warn about C99 declaration after statement
537CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
538
539# disable pointer signedness warnings in gcc 4.0
540CFLAGS += $(call cc-option,-Wno-pointer-sign,)
541
542# Default kernel image to build when no specific target is given.
543# KBUILD_IMAGE may be overruled on the commandline or
544# set in the environment
545# Also any assignments in arch/$(ARCH)/Makefile take precedence over
546# this default value
547export KBUILD_IMAGE ?= vmlinux
548
549#
550# INSTALL_PATH specifies where to place the updated kernel and system map
551# images. Default is /boot, but you can set it to other values
552export INSTALL_PATH ?= /boot
553
Ryan Andersonaaebf432005-07-31 04:57:49 -0400554# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
555# and try to determine if the current source tree is a release tree, of any sort,
556# or if is a pure development tree.
557#
558# A 'release tree' is any tree with a git TAG associated
559# with it. The primary goal of this is to make it safe for a native
560# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
561# continue developing against the current Linus tree, without having the Linus
562# tree overwrite the 2.6.9 tree when installed.
563#
564# Currently, only git is supported.
565# Other SCMs can edit scripts/setlocalversion and add the appropriate
566# checks as needed.
567
568
569ifdef CONFIG_LOCALVERSION_AUTO
570 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
571 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
572endif
573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574#
575# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
576# relocations required by build roots. This is not defined in the
577# makefile but the arguement can be passed to make if needed.
578#
579
580MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
581export MODLIB
582
583
584ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100585core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
588 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
589 $(net-y) $(net-m) $(libs-y) $(libs-m)))
590
591vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
592 $(init-n) $(init-) \
593 $(core-n) $(core-) $(drivers-n) $(drivers-) \
594 $(net-n) $(net-) $(libs-n) $(libs-))))
595
596init-y := $(patsubst %/, %/built-in.o, $(init-y))
597core-y := $(patsubst %/, %/built-in.o, $(core-y))
598drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
599net-y := $(patsubst %/, %/built-in.o, $(net-y))
600libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
601libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
602libs-y := $(libs-y1) $(libs-y2)
603
604# Build vmlinux
605# ---------------------------------------------------------------------------
606# vmlinux is build from the objects selected by $(vmlinux-init) and
607# $(vmlinux-main). Most are built-in.o files from top-level directories
608# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
609# Ordering when linking is important, and $(vmlinux-init) must be first.
610#
611# vmlinux
612# ^
613# |
614# +-< $(vmlinux-init)
615# | +--< init/version.o + more
616# |
617# +--< $(vmlinux-main)
618# | +--< driver/built-in.o mm/built-in.o + more
619# |
620# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
621#
622# vmlinux version (uname -v) cannot be updated during normal
623# descending-into-subdirs phase since we do not yet know if we need to
624# update vmlinux.
625# Therefore this step is delayed until just before final link of vmlinux -
626# except in the kallsyms case where it is done just before adding the
627# symbols to the kernel.
628#
629# System.map is generated to document addresses of all kernel symbols
630
631vmlinux-init := $(head-y) $(init-y)
632vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
633vmlinux-all := $(vmlinux-init) $(vmlinux-main)
634vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
635
636# Rule to link vmlinux - also used during CONFIG_KALLSYMS
637# May be overridden by arch/$(ARCH)/Makefile
638quiet_cmd_vmlinux__ ?= LD $@
639 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
640 -T $(vmlinux-lds) $(vmlinux-init) \
641 --start-group $(vmlinux-main) --end-group \
642 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
643
644# Generate new vmlinux version
645quiet_cmd_vmlinux_version = GEN .version
646 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200647 if [ ! -r .version ]; then \
648 rm -f .version; \
649 echo 1 >.version; \
650 else \
651 mv .version .old_version; \
652 expr 0$$(cat .old_version) + 1 >.version; \
653 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 $(MAKE) $(build)=init
655
656# Generate System.map
657quiet_cmd_sysmap = SYSMAP
658 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
659
660# Link of vmlinux
661# If CONFIG_KALLSYMS is set .version is already updated
662# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700663# Use + in front of the vmlinux_version rule to silent warning with make -j2
664# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700666 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
668
669 $(call cmd,vmlinux__)
670 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
671
672 $(Q)$(if $($(quiet)cmd_sysmap), \
673 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
674 $(cmd_sysmap) $@ System.map; \
675 if [ $$? -ne 0 ]; then \
676 rm -f $@; \
677 /bin/false; \
678 fi;
679 $(verify_kallsyms)
680endef
681
682
683ifdef CONFIG_KALLSYMS
684# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
685# It's a three stage process:
686# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
687# empty
688# Running kallsyms on that gives us .tmp_kallsyms1.o with
689# the right size - vmlinux version (uname -v) is updated during this step
690# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
691# but due to the added section, some addresses have shifted.
692# From here, we generate a correct .tmp_kallsyms2.o
693# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
694# o Verify that the System.map from vmlinux matches the map from
695# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
696# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
697# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
698# temporary bypass to allow the kernel to be built while the
699# maintainers work out what went wrong with kallsyms.
700
701ifdef CONFIG_KALLSYMS_EXTRA_PASS
702last_kallsyms := 3
703else
704last_kallsyms := 2
705endif
706
707kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
708
709define verify_kallsyms
710 $(Q)$(if $($(quiet)cmd_sysmap), \
711 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
712 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
713 $(Q)cmp -s System.map .tmp_System.map || \
714 (echo Inconsistent kallsyms data; \
715 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
716 rm .tmp_kallsyms* ; /bin/false )
717endef
718
719# Update vmlinux version before link
720# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200721# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722cmd_ksym_ld = $(cmd_vmlinux__)
723define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200724 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 +$(call cmd,vmlinux_version)
726 $(call cmd,vmlinux__)
727 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
728endef
729
730# Generate .S file with all kernel symbols
731quiet_cmd_kallsyms = KSYM $@
732 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
733 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
734
735.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
736 $(call if_changed_dep,as_o_S)
737
738.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
739 $(call cmd,kallsyms)
740
741# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
742.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
743 $(call if_changed_rule,ksym_ld)
744
745.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
746 $(call if_changed,vmlinux__)
747
748.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
749 $(call if_changed,vmlinux__)
750
751# Needs to visit scripts/ before $(KALLSYMS) can be used.
752$(KALLSYMS): scripts ;
753
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000754# Generate some data for debugging strange kallsyms problems
755debug_kallsyms: .tmp_map$(last_kallsyms)
756
757.tmp_map%: .tmp_vmlinux% FORCE
758 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
759
760.tmp_map3: .tmp_map2
761
762.tmp_map2: .tmp_map1
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764endif # ifdef CONFIG_KALLSYMS
765
766# vmlinux image - including updated kernel symbols
767vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
768 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200769 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771# The actual objects are generated when descending,
772# make sure no implicit rule kicks in
773$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
774
775# Handle descending into subdirectories listed in $(vmlinux-dirs)
776# Preset locale variables to speed up the build process. Limit locale
777# tweaks to this spot to avoid wrong language settings when running
778# make menuconfig etc.
779# Error messages still appears in the original language
780
781.PHONY: $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200782$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 $(Q)$(MAKE) $(build)=$@
784
785# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200786# or the modules are listed in "prepare".
787# A multi level approach is used. prepareN is processed before prepareN-1.
788# archprepare is used in arch Makefiles and when processed asm symlink,
789# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200791# Listed in dependency order
792.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
793
794# prepare-all is deprecated, use prepare as valid replacement
795.PHONY: prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200797# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798# and if so do:
799# 1) Check that make has not been executed in the kernel src $(srctree)
800# 2) Create the include2 directory, used for the second asm symlink
801
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200802prepare3:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803ifneq ($(KBUILD_SRC),)
804 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000805 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 echo " $(srctree) is not clean, please run 'make mrproper'";\
807 echo " in the '$(srctree)' directory.";\
808 /bin/false; \
809 fi;
810 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
811 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
812endif
813
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200814# prepare2 creates a makefile if using a separate output directory
815prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200817prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000818 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819ifneq ($(KBUILD_MODULES),)
820 $(Q)rm -rf $(MODVERDIR)
821 $(Q)mkdir -p $(MODVERDIR)
822endif
823
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200824archprepare: prepare1 scripts_basic
825
826prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200827 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200830prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
832# Leave this as default for preprocessing vmlinux.lds.S, which is now
833# done in arch/$(ARCH)/kernel/Makefile
834
835export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
836
837# Single targets
838# ---------------------------------------------------------------------------
839
840%.s: %.c scripts FORCE
841 $(Q)$(MAKE) $(build)=$(@D) $@
842%.i: %.c scripts FORCE
843 $(Q)$(MAKE) $(build)=$(@D) $@
844%.o: %.c scripts FORCE
845 $(Q)$(MAKE) $(build)=$(@D) $@
Sam Ravnborg155ad602005-07-07 17:56:08 -0700846%.ko: scripts FORCE
847 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
848 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849%/: scripts prepare FORCE
850 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
851%.lst: %.c scripts FORCE
852 $(Q)$(MAKE) $(build)=$(@D) $@
853%.s: %.S scripts FORCE
854 $(Q)$(MAKE) $(build)=$(@D) $@
855%.o: %.S scripts FORCE
856 $(Q)$(MAKE) $(build)=$(@D) $@
857
858# FIXME: The asm symlink changes when $(ARCH) changes. That's
859# hard to detect, but I suppose "make mrproper" is a good idea
860# before switching between archs anyway.
861
862include/asm:
863 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
864 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
865 @ln -fsn asm-$(ARCH) $@
866
867# Split autoconf.h into include/linux/config/*
868
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200869include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
871 @scripts/basic/split-include include/linux/autoconf.h include/config
872 @touch $@
873
874# Generate some files
875# ---------------------------------------------------------------------------
876
877# KERNELRELEASE can change from a few different places, meaning version.h
878# needs to be updated, so this check is forced on all builds
879
880uts_len := 64
881
882define filechk_version.h
883 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
884 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
885 exit 1; \
886 fi; \
887 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
888 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
889 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
890 )
891endef
892
893include/linux/version.h: $(srctree)/Makefile FORCE
894 $(call filechk,version.h)
895
896# ---------------------------------------------------------------------------
897
898.PHONY: depend dep
899depend dep:
900 @echo '*** Warning: make $@ is unnecessary now.'
901
902# ---------------------------------------------------------------------------
903# Modules
904
905ifdef CONFIG_MODULES
906
907# By default, build modules as well
908
909all: modules
910
911# Build modules
912
913.PHONY: modules
914modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
915 @echo ' Building modules, stage 2.';
916 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
917
918
919# Target to prepare building external modules
920.PHONY: modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200921modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
923# Target to install modules
924.PHONY: modules_install
925modules_install: _modinst_ _modinst_post
926
927.PHONY: _modinst_
928_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700929 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 echo "Warning: you may need to install module-init-tools"; \
931 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
932 sleep 1; \
933 fi
934 @rm -rf $(MODLIB)/kernel
935 @rm -f $(MODLIB)/source
936 @mkdir -p $(MODLIB)/kernel
937 @ln -s $(srctree) $(MODLIB)/source
938 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
939 rm -f $(MODLIB)/build ; \
940 ln -s $(objtree) $(MODLIB)/build ; \
941 fi
942 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
943
944# If System.map exists, run depmod. This deliberately does not have a
945# dependency on System.map since that would run the dependency tree on
946# vmlinux. This depmod is only for convenience to give the initial
947# boot a modules.dep even before / is mounted read-write. However the
948# boot script depmod is the master version.
949ifeq "$(strip $(INSTALL_MOD_PATH))" ""
950depmod_opts :=
951else
952depmod_opts := -b $(INSTALL_MOD_PATH) -r
953endif
954.PHONY: _modinst_post
955_modinst_post: _modinst_
956 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
957
958else # CONFIG_MODULES
959
960# Modules not configured
961# ---------------------------------------------------------------------------
962
963modules modules_install: FORCE
964 @echo
965 @echo "The present kernel configuration has modules disabled."
966 @echo "Type 'make config' and enable loadable module support."
967 @echo "Then build a kernel with module support enabled."
968 @echo
969 @exit 1
970
971endif # CONFIG_MODULES
972
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973###
974# Cleaning is done on three levels.
975# make clean Delete most generated files
976# Leave enough to build external modules
977# make mrproper Delete the current configuration, and all generated files
978# make distclean Remove editor backup files, patch leftover files and the like
979
980# Directories & files removed with 'make clean'
981CLEAN_DIRS += $(MODVERDIR)
982CLEAN_FILES += vmlinux System.map \
983 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
984
985# Directories & files removed with 'make mrproper'
986MRPROPER_DIRS += include/config include2
987MRPROPER_FILES += .config .config.old include/asm .version \
988 include/linux/autoconf.h include/linux/version.h \
989 Module.symvers tags TAGS cscope*
990
991# clean - Delete most, but leave enough to build external modules
992#
993clean: rm-dirs := $(CLEAN_DIRS)
994clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200995clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
997.PHONY: $(clean-dirs) clean archclean
998$(clean-dirs):
999 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1000
1001clean: archclean $(clean-dirs)
1002 $(call cmd,rmdirs)
1003 $(call cmd,rmfiles)
1004 @find . $(RCS_FIND_IGNORE) \
1005 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1006 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1007 -type f -print | xargs rm -f
1008
1009# mrproper - Delete all generated files, including .config
1010#
1011mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1012mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1013mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1014
1015.PHONY: $(mrproper-dirs) mrproper archmrproper
1016$(mrproper-dirs):
1017 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1018
1019mrproper: clean archmrproper $(mrproper-dirs)
1020 $(call cmd,rmdirs)
1021 $(call cmd,rmfiles)
1022
1023# distclean
1024#
1025.PHONY: distclean
1026
1027distclean: mrproper
1028 @find $(srctree) $(RCS_FIND_IGNORE) \
1029 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1030 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1031 -o -name '.*.rej' -o -size 0 \
1032 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1033 -type f -print | xargs rm -f
1034
1035
1036# Packaging of the kernel to various formats
1037# ---------------------------------------------------------------------------
1038# rpm target kept for backward compatibility
1039package-dir := $(srctree)/scripts/package
1040
1041.PHONY: %-pkg rpm
1042
1043%pkg: FORCE
1044 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1045rpm: FORCE
1046 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1047
1048
1049# Brief documentation of the typical targets used
1050# ---------------------------------------------------------------------------
1051
1052boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1053boards := $(notdir $(boards))
1054
1055help:
1056 @echo 'Cleaning targets:'
1057 @echo ' clean - remove most generated files but keep the config'
1058 @echo ' mrproper - remove all generated files + config + various backup files'
1059 @echo ''
1060 @echo 'Configuration targets:'
1061 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1062 @echo ''
1063 @echo 'Other generic targets:'
1064 @echo ' all - Build all targets marked with [*]'
1065 @echo '* vmlinux - Build the bare kernel'
1066 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001067 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 @echo ' dir/ - Build all files in dir and below'
1069 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001070 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 @echo ' rpm - Build a kernel as an RPM package'
1072 @echo ' tags/TAGS - Generate tags file for editors'
1073 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001074 @echo ' kernelrelease - Output the release version string'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 @echo ''
1076 @echo 'Static analysers'
1077 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1078 @echo ' and init sections from non-init sections'
1079 @echo ' checkstack - Generate a list of stack hogs'
1080 @echo ' namespacecheck - Name space analysis on compiled kernel'
1081 @echo ''
1082 @echo 'Kernel packaging:'
1083 @$(MAKE) -f $(package-dir)/Makefile help
1084 @echo ''
1085 @echo 'Documentation targets:'
1086 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1087 @echo ''
1088 @echo 'Architecture specific targets ($(ARCH)):'
1089 @$(if $(archhelp),$(archhelp),\
1090 echo ' No architecture specific help defined for $(ARCH)')
1091 @echo ''
1092 @$(if $(boards), \
1093 $(foreach b, $(boards), \
1094 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1095 echo '')
1096
1097 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1098 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1099 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1100 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1101 @echo ''
1102 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1103 @echo 'For further info see the ./README file'
1104
1105
1106# Documentation targets
1107# ---------------------------------------------------------------------------
1108%docs: scripts_basic FORCE
1109 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1110
1111else # KBUILD_EXTMOD
1112
1113###
1114# External module support.
1115# When building external modules the kernel used as basis is considered
1116# read-only, and no consistency checks are made and the make
1117# system is not used on the basis kernel. If updates are required
1118# in the basis kernel ordinary make commands (without M=...) must
1119# be used.
1120#
1121# The following are the only valid targets when building external
1122# modules.
1123# make M=dir clean Delete all automatically generated files
1124# make M=dir modules Make all modules in specified dir
1125# make M=dir Same as 'make M=dir modules'
1126# make M=dir modules_install
1127# Install the modules build in the module directory
1128# Assumes install directory is already created
1129
1130# We are always building modules
1131KBUILD_MODULES := 1
1132.PHONY: crmodverdir
1133crmodverdir:
1134 $(Q)mkdir -p $(MODVERDIR)
1135
1136.PHONY: $(objtree)/Module.symvers
1137$(objtree)/Module.symvers:
1138 @test -e $(objtree)/Module.symvers || ( \
1139 echo; \
1140 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1141 echo " is missing; modules will have no dependencies and modversions."; \
1142 echo )
1143
1144module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1145.PHONY: $(module-dirs) modules
1146$(module-dirs): crmodverdir $(objtree)/Module.symvers
1147 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1148
1149modules: $(module-dirs)
1150 @echo ' Building modules, stage 2.';
1151 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1152
1153.PHONY: modules_install
1154modules_install:
1155 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1156
1157clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1158
1159.PHONY: $(clean-dirs) clean
1160$(clean-dirs):
1161 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1162
1163clean: rm-dirs := $(MODVERDIR)
1164clean: $(clean-dirs)
1165 $(call cmd,rmdirs)
1166 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1167 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1168 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1169 -type f -print | xargs rm -f
1170
1171help:
1172 @echo ' Building external modules.'
1173 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1174 @echo ''
1175 @echo ' modules - default target, build the module(s)'
1176 @echo ' modules_install - install the module'
1177 @echo ' clean - remove generated files in module directory only'
1178 @echo ''
1179endif # KBUILD_EXTMOD
1180
1181# Generate tags for editors
1182# ---------------------------------------------------------------------------
1183
1184#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1185#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1186#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1187
George Anzingerf182ae62005-07-07 17:56:06 -07001188ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189__srctree =
1190else
1191__srctree = $(srctree)/
1192endif
1193
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001194ifeq ($(ALLSOURCE_ARCHS),)
1195ifeq ($(ARCH),um)
1196ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1197else
1198ALLINCLUDE_ARCHS := $(ARCH)
1199endif
1200else
1201#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1202ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1203endif
1204
Ian Campbella0674e82005-06-23 11:25:54 +01001205ALLSOURCE_ARCHS := $(ARCH)
1206
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207define all-sources
1208 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1209 \( -name include -o -name arch \) -prune -o \
1210 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001211 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1212 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1213 -name '*.[chS]' -print; \
1214 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1216 -name '*.[chS]' -print; \
1217 find $(__srctree)include $(RCS_FIND_IGNORE) \
1218 \( -name config -o -name 'asm-*' \) -prune \
1219 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001220 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001221 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1222 -name '*.[chS]' -print; \
1223 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1225 -name '*.[chS]' -print )
1226endef
1227
1228quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001229 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230
1231quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001232 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
1234cscope: FORCE
1235 $(call cmd,cscope-file)
1236 $(call cmd,cscope)
1237
1238quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001239define cmd_TAGS
1240 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001241 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1242 echo "-I __initdata,__exitdata,__acquires,__releases \
1243 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1244 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001245 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001246endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001248TAGS: FORCE
1249 $(call cmd,TAGS)
1250
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
1252quiet_cmd_tags = MAKE $@
1253define cmd_tags
1254 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001255 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1256 echo "-I __initdata,__exitdata,__acquires,__releases \
1257 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1258 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001259 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260endef
1261
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262tags: FORCE
1263 $(call cmd,tags)
1264
1265
1266# Scripts to check various things for consistency
1267# ---------------------------------------------------------------------------
1268
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269includecheck:
1270 find * $(RCS_FIND_IGNORE) \
1271 -name '*.[hcS]' -type f -print | sort \
1272 | xargs $(PERL) -w scripts/checkincludes.pl
1273
1274versioncheck:
1275 find * $(RCS_FIND_IGNORE) \
1276 -name '*.[hcS]' -type f -print | sort \
1277 | xargs $(PERL) -w scripts/checkversion.pl
1278
1279buildcheck:
1280 $(PERL) $(srctree)/scripts/reference_discarded.pl
1281 $(PERL) $(srctree)/scripts/reference_init.pl
1282
1283namespacecheck:
1284 $(PERL) $(srctree)/scripts/namespace.pl
1285
1286endif #ifeq ($(config-targets),1)
1287endif #ifeq ($(mixed-targets),1)
1288
1289.PHONY: checkstack
1290checkstack:
1291 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1292 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1293
1294kernelrelease:
1295 @echo $(KERNELRELEASE)
1296
1297# FIXME Should go into a make.lib or something
1298# ===========================================================================
1299
1300quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1301 cmd_rmdirs = rm -rf $(rm-dirs)
1302
1303quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1304 cmd_rmfiles = rm -f $(rm-files)
1305
1306
1307a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1308 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1309 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1310
1311quiet_cmd_as_o_S = AS $@
1312cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1313
1314# read all saved command lines
1315
1316targets := $(wildcard $(sort $(targets)))
1317cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1318
1319ifneq ($(cmd_files),)
1320 $(cmd_files): ; # Do not try to update included dependency files
1321 include $(cmd_files)
1322endif
1323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1325# Usage:
1326# $(Q)$(MAKE) $(clean)=dir
1327clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329endif # skip-makefile
1330
1331FORCE: