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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds2f4ba452005-09-12 20:12:09 -07003SUBLEVEL = 14
Linus Torvalds741b2252005-10-27 17:02:08 -07004EXTRAVERSION =
Benjamin LaHaise5bbe6ab2005-08-28 18:05:17 -04005NAME=Affluent Albatross
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/ \
171 -e s/s390x/s390/ -e s/parisc64/parisc/ )
172
173# Cross compiling and selecting different set of gcc/bin-utils
174# ---------------------------------------------------------------------------
175#
176# When performing cross compilation for other architectures ARCH shall be set
177# to the target architecture. (See arch/* for the possibilities).
178# ARCH can be set during invocation of make:
179# make ARCH=ia64
180# Another way is to have ARCH set in the environment.
181# The default ARCH is the host where make is executed.
182
183# CROSS_COMPILE specify the prefix used for all executables used
184# during compilation. Only gcc and related bin-utils executables
185# are prefixed with $(CROSS_COMPILE).
186# CROSS_COMPILE can be set on the command line
187# make CROSS_COMPILE=ia64-linux-
188# Alternatively CROSS_COMPILE can be set in the environment.
189# Default value for CROSS_COMPILE is not to prefix executables
190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
191
192ARCH ?= $(SUBARCH)
193CROSS_COMPILE ?=
194
195# Architecture as present in compile.h
196UTS_MACHINE := $(ARCH)
197
198# SHELL used by kbuild
199CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
200 else if [ -x /bin/bash ]; then echo /bin/bash; \
201 else echo sh; fi ; fi)
202
203HOSTCC = gcc
204HOSTCXX = g++
205HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
206HOSTCXXFLAGS = -O2
207
208# Decide whether to build built-in, modular, or both.
209# Normally, just do built-in.
210
211KBUILD_MODULES :=
212KBUILD_BUILTIN := 1
213
214# If we have only "make modules", don't compile built-in objects.
215# When we're building modules with modversions, we need to consider
216# the built-in objects during the descend as well, in order to
217# make sure the checksums are uptodate before we record them.
218
219ifeq ($(MAKECMDGOALS),modules)
220 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
221endif
222
223# If we have "make <whatever> modules", compile modules
224# in addition to whatever we do anyway.
225# Just "make" or "make all" shall build modules as well
226
227ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
228 KBUILD_MODULES := 1
229endif
230
231ifeq ($(MAKECMDGOALS),)
232 KBUILD_MODULES := 1
233endif
234
Sam Ravnborge579d352005-07-27 08:10:10 +0200235export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
237
238# Beautify output
239# ---------------------------------------------------------------------------
240#
241# Normally, we echo the whole command before executing it. By making
242# that echo $($(quiet)$(cmd)), we now have the possibility to set
243# $(quiet) to choose other forms of output instead, e.g.
244#
245# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
246# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
247#
248# If $(quiet) is empty, the whole command will be printed.
249# If it is set to "quiet_", only the short version will be printed.
250# If it is set to "silent_", nothing wil be printed at all, since
251# the variable $(silent_cmd_cc_o_c) doesn't exist.
252#
253# A simple variant is to prefix commands with $(Q) - that's usefull
254# for commands that shall be hidden in non-verbose mode.
255#
256# $(Q)ln $@ :<
257#
258# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
259# If KBUILD_VERBOSE equals 1 then the above command is displayed.
260
261ifeq ($(KBUILD_VERBOSE),1)
262 quiet =
263 Q =
264else
265 quiet=quiet_
266 Q = @
267endif
268
269# If the user is running make -s (silent mode), suppress echoing of
270# commands
271
272ifneq ($(findstring s,$(MAKEFLAGS)),)
273 quiet=silent_
274endif
275
276export quiet Q KBUILD_VERBOSE
277
278######
279# cc support functions to be used (only) in arch/$(ARCH)/Makefile
280# See documentation in Documentation/kbuild/makefiles.txt
281
282# cc-option
Alexey Dobriyanae67cd62005-06-25 14:55:36 -0700283# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
285cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
286 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
287
288# For backward compatibility
289check_gcc = $(warning check_gcc is deprecated - use cc-option) \
290 $(call cc-option, $(1),$(2))
291
292# cc-option-yn
293# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
294cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
295 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
296
297# cc-option-align
298# Prefix align with either -falign or -malign
299cc-option-align = $(subst -functions=0,,\
300 $(call cc-option,-falign-functions=0,-malign-functions=0))
301
302# cc-version
303# Usage gcc-ver := $(call cc-version $(CC))
304cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
305 $(if $(1), $(1), $(CC)))
306
307
308# Look for make include files relative to root of kernel src
309MAKEFLAGS += --include-dir=$(srctree)
310
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000311# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000312include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314# For maximum performance (+ possibly random breakage, uncomment
315# the following)
316
317#MAKEFLAGS += -rR
318
319# Make variables (CC, etc...)
320
321AS = $(CROSS_COMPILE)as
322LD = $(CROSS_COMPILE)ld
323CC = $(CROSS_COMPILE)gcc
324CPP = $(CC) -E
325AR = $(CROSS_COMPILE)ar
326NM = $(CROSS_COMPILE)nm
327STRIP = $(CROSS_COMPILE)strip
328OBJCOPY = $(CROSS_COMPILE)objcopy
329OBJDUMP = $(CROSS_COMPILE)objdump
330AWK = awk
331GENKSYMS = scripts/genksyms/genksyms
332DEPMOD = /sbin/depmod
333KALLSYMS = scripts/kallsyms
334PERL = perl
335CHECK = sparse
336
Al Viroaf4ca452005-10-21 02:55:38 -0400337CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338MODFLAGS = -DMODULE
339CFLAGS_MODULE = $(MODFLAGS)
340AFLAGS_MODULE = $(MODFLAGS)
341LDFLAGS_MODULE = -r
342CFLAGS_KERNEL =
343AFLAGS_KERNEL =
344
345
346# Use LINUXINCLUDE when you must reference the include/ directory.
347# Needed to be compatible with the O= option
348LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800350 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
353
Olaf Hering3c521e02005-07-21 21:02:09 +0200354CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 -fno-strict-aliasing -fno-common \
356 -ffreestanding
357AFLAGS := -D__ASSEMBLY__
358
359export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
360 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
361 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
362 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
363
364export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
365export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
366export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
367
368# When compiling out-of-tree modules, put MODVERDIR in the module
369# tree rather than in the kernel tree. The kernel tree might
370# even be read-only.
371export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373# Files to ignore in find ... statements
374
Trond Myklebust406119f2005-10-27 14:46:53 -0400375RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
376export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378# ===========================================================================
379# Rules shared between *config targets and build targets
380
381# Basic helpers built in scripts/
382.PHONY: scripts_basic
383scripts_basic:
384 $(Q)$(MAKE) $(build)=scripts/basic
385
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200386# To avoid any implicit rule to kick in, define an empty command.
387scripts/basic/%: scripts_basic ;
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389.PHONY: outputmakefile
390# outputmakefile generate a Makefile to be placed in output directory, if
391# using a seperate output directory. This allows convinient use
392# of make in output directory
393outputmakefile:
394 $(Q)if test ! $(srctree) -ef $(objtree); then \
395 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
396 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
397 > $(objtree)/Makefile; \
398 echo ' GEN $(objtree)/Makefile'; \
399 fi
400
401# To make sure we do not include .config for any of the *config targets
402# catch them early, and hand them over to scripts/kconfig/Makefile
403# It is allowed to specify more targets when calling make, including
404# mixing *config targets and build targets.
405# For example 'make oldconfig all'.
406# Detect when mixed targets is specified, and make a second invocation
407# of make so .config is not included in this case either (for *config).
408
409no-dot-config-targets := clean mrproper distclean \
Uwe Zeisbergerac4d5f72005-11-09 15:54:08 +0100410 cscope TAGS tags help %docs check% kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
412config-targets := 0
413mixed-targets := 0
414dot-config := 1
415
416ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
417 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
418 dot-config := 0
419 endif
420endif
421
422ifeq ($(KBUILD_EXTMOD),)
423 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
424 config-targets := 1
425 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
426 mixed-targets := 1
427 endif
428 endif
429endif
430
431ifeq ($(mixed-targets),1)
432# ===========================================================================
433# We're called with mixed targets (*config and build targets).
434# Handle them one by one.
435
436%:: FORCE
437 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
438
439else
440ifeq ($(config-targets),1)
441# ===========================================================================
442# *config targets only - make sure prerequisites are updated, and descend
443# in scripts/kconfig to make the *config target
444
445# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
446# KBUILD_DEFCONFIG may point out an alternative default configuration
447# used for 'make defconfig'
448include $(srctree)/arch/$(ARCH)/Makefile
449export KBUILD_DEFCONFIG
450
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200451config %config: scripts_basic outputmakefile FORCE
452 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454
455else
456# ===========================================================================
457# Build targets only - this includes vmlinux, arch specific targets, clean
458# targets and others. In general all targets except *config targets.
459
460ifeq ($(KBUILD_EXTMOD),)
461# Additional helpers built in scripts/
462# Carefully list dependencies so we do not try to build scripts twice
463# in parrallel
464.PHONY: scripts
465scripts: scripts_basic include/config/MARKER
466 $(Q)$(MAKE) $(build)=$(@)
467
468scripts_basic: include/linux/autoconf.h
469
470# Objects we will link into vmlinux / subdirs we need to visit
471init-y := init/
472drivers-y := drivers/ sound/
473net-y := net/
474libs-y := lib/
475core-y := usr/
476endif # KBUILD_EXTMOD
477
478ifeq ($(dot-config),1)
479# In this section, we need .config
480
481# Read in dependencies to all Kconfig* files, make sure to run
482# oldconfig if changes are detected.
483-include .config.cmd
484
485include .config
486
487# If .config needs to be updated, it will be done via the dependency
488# that autoconf has on .config.
489# To avoid any implicit rule to kick in, define an empty command
490.config: ;
491
492# If .config is newer than include/linux/autoconf.h, someone tinkered
493# with it and forgot to run make oldconfig
494include/linux/autoconf.h: .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200495 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
497else
498# Dummy target needed, because used as prerequisite
499include/linux/autoconf.h: ;
500endif
501
502# The all: target is the default when no target is given on the
503# command line.
504# This allow a user to issue only 'make' to build a kernel including modules
505# Defaults vmlinux but it is usually overriden in the arch makefile
506all: vmlinux
507
508ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
509CFLAGS += -Os
510else
511CFLAGS += -O2
512endif
513
514#Add align options if CONFIG_CC_* is not equal to 0
515add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
519CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
520
521ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700522CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523else
524CFLAGS += -fomit-frame-pointer
525endif
526
527ifdef CONFIG_DEBUG_INFO
528CFLAGS += -g
529endif
530
531include $(srctree)/arch/$(ARCH)/Makefile
532
Sam Ravnborge8e69932005-04-30 16:51:42 -0700533# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700534NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700535CHECKFLAGS += $(NOSTDINC_FLAGS)
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537# warn about C99 declaration after statement
538CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
539
540# disable pointer signedness warnings in gcc 4.0
541CFLAGS += $(call cc-option,-Wno-pointer-sign,)
542
543# Default kernel image to build when no specific target is given.
544# KBUILD_IMAGE may be overruled on the commandline or
545# set in the environment
546# Also any assignments in arch/$(ARCH)/Makefile take precedence over
547# this default value
548export KBUILD_IMAGE ?= vmlinux
549
550#
551# INSTALL_PATH specifies where to place the updated kernel and system map
552# images. Default is /boot, but you can set it to other values
553export INSTALL_PATH ?= /boot
554
Ryan Andersonaaebf432005-07-31 04:57:49 -0400555# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
556# and try to determine if the current source tree is a release tree, of any sort,
557# or if is a pure development tree.
558#
559# A 'release tree' is any tree with a git TAG associated
560# with it. The primary goal of this is to make it safe for a native
561# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
562# continue developing against the current Linus tree, without having the Linus
563# tree overwrite the 2.6.9 tree when installed.
564#
565# Currently, only git is supported.
566# Other SCMs can edit scripts/setlocalversion and add the appropriate
567# checks as needed.
568
569
570ifdef CONFIG_LOCALVERSION_AUTO
571 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
572 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
573endif
574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575#
576# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
577# relocations required by build roots. This is not defined in the
578# makefile but the arguement can be passed to make if needed.
579#
580
581MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
582export MODLIB
583
584
585ifeq ($(KBUILD_EXTMOD),)
586core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
587
588vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
589 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
590 $(net-y) $(net-m) $(libs-y) $(libs-m)))
591
592vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
593 $(init-n) $(init-) \
594 $(core-n) $(core-) $(drivers-n) $(drivers-) \
595 $(net-n) $(net-) $(libs-n) $(libs-))))
596
597init-y := $(patsubst %/, %/built-in.o, $(init-y))
598core-y := $(patsubst %/, %/built-in.o, $(core-y))
599drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
600net-y := $(patsubst %/, %/built-in.o, $(net-y))
601libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
602libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
603libs-y := $(libs-y1) $(libs-y2)
604
605# Build vmlinux
606# ---------------------------------------------------------------------------
607# vmlinux is build from the objects selected by $(vmlinux-init) and
608# $(vmlinux-main). Most are built-in.o files from top-level directories
609# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
610# Ordering when linking is important, and $(vmlinux-init) must be first.
611#
612# vmlinux
613# ^
614# |
615# +-< $(vmlinux-init)
616# | +--< init/version.o + more
617# |
618# +--< $(vmlinux-main)
619# | +--< driver/built-in.o mm/built-in.o + more
620# |
621# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
622#
623# vmlinux version (uname -v) cannot be updated during normal
624# descending-into-subdirs phase since we do not yet know if we need to
625# update vmlinux.
626# Therefore this step is delayed until just before final link of vmlinux -
627# except in the kallsyms case where it is done just before adding the
628# symbols to the kernel.
629#
630# System.map is generated to document addresses of all kernel symbols
631
632vmlinux-init := $(head-y) $(init-y)
633vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
634vmlinux-all := $(vmlinux-init) $(vmlinux-main)
635vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
636
637# Rule to link vmlinux - also used during CONFIG_KALLSYMS
638# May be overridden by arch/$(ARCH)/Makefile
639quiet_cmd_vmlinux__ ?= LD $@
640 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
641 -T $(vmlinux-lds) $(vmlinux-init) \
642 --start-group $(vmlinux-main) --end-group \
643 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
644
645# Generate new vmlinux version
646quiet_cmd_vmlinux_version = GEN .version
647 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200648 if [ ! -r .version ]; then \
649 rm -f .version; \
650 echo 1 >.version; \
651 else \
652 mv .version .old_version; \
653 expr 0$$(cat .old_version) + 1 >.version; \
654 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 $(MAKE) $(build)=init
656
657# Generate System.map
658quiet_cmd_sysmap = SYSMAP
659 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
660
661# Link of vmlinux
662# If CONFIG_KALLSYMS is set .version is already updated
663# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700664# Use + in front of the vmlinux_version rule to silent warning with make -j2
665# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700667 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
669
670 $(call cmd,vmlinux__)
671 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
672
673 $(Q)$(if $($(quiet)cmd_sysmap), \
674 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
675 $(cmd_sysmap) $@ System.map; \
676 if [ $$? -ne 0 ]; then \
677 rm -f $@; \
678 /bin/false; \
679 fi;
680 $(verify_kallsyms)
681endef
682
683
684ifdef CONFIG_KALLSYMS
685# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
686# It's a three stage process:
687# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
688# empty
689# Running kallsyms on that gives us .tmp_kallsyms1.o with
690# the right size - vmlinux version (uname -v) is updated during this step
691# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
692# but due to the added section, some addresses have shifted.
693# From here, we generate a correct .tmp_kallsyms2.o
694# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
695# o Verify that the System.map from vmlinux matches the map from
696# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
697# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
698# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
699# temporary bypass to allow the kernel to be built while the
700# maintainers work out what went wrong with kallsyms.
701
702ifdef CONFIG_KALLSYMS_EXTRA_PASS
703last_kallsyms := 3
704else
705last_kallsyms := 2
706endif
707
708kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
709
710define verify_kallsyms
711 $(Q)$(if $($(quiet)cmd_sysmap), \
712 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
713 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
714 $(Q)cmp -s System.map .tmp_System.map || \
715 (echo Inconsistent kallsyms data; \
716 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
717 rm .tmp_kallsyms* ; /bin/false )
718endef
719
720# Update vmlinux version before link
721# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200722# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723cmd_ksym_ld = $(cmd_vmlinux__)
724define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200725 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 +$(call cmd,vmlinux_version)
727 $(call cmd,vmlinux__)
728 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
729endef
730
731# Generate .S file with all kernel symbols
732quiet_cmd_kallsyms = KSYM $@
733 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
734 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
735
736.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
737 $(call if_changed_dep,as_o_S)
738
739.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
740 $(call cmd,kallsyms)
741
742# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
743.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
744 $(call if_changed_rule,ksym_ld)
745
746.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
747 $(call if_changed,vmlinux__)
748
749.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
750 $(call if_changed,vmlinux__)
751
752# Needs to visit scripts/ before $(KALLSYMS) can be used.
753$(KALLSYMS): scripts ;
754
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000755# Generate some data for debugging strange kallsyms problems
756debug_kallsyms: .tmp_map$(last_kallsyms)
757
758.tmp_map%: .tmp_vmlinux% FORCE
759 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
760
761.tmp_map3: .tmp_map2
762
763.tmp_map2: .tmp_map1
764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765endif # ifdef CONFIG_KALLSYMS
766
767# vmlinux image - including updated kernel symbols
768vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
769 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200770 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
772# The actual objects are generated when descending,
773# make sure no implicit rule kicks in
774$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
775
776# Handle descending into subdirectories listed in $(vmlinux-dirs)
777# Preset locale variables to speed up the build process. Limit locale
778# tweaks to this spot to avoid wrong language settings when running
779# make menuconfig etc.
780# Error messages still appears in the original language
781
782.PHONY: $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200783$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 $(Q)$(MAKE) $(build)=$@
785
786# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200787# or the modules are listed in "prepare".
788# A multi level approach is used. prepareN is processed before prepareN-1.
789# archprepare is used in arch Makefiles and when processed asm symlink,
790# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200792# Listed in dependency order
793.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
794
795# prepare-all is deprecated, use prepare as valid replacement
796.PHONY: prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200798# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799# and if so do:
800# 1) Check that make has not been executed in the kernel src $(srctree)
801# 2) Create the include2 directory, used for the second asm symlink
802
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200803prepare3:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804ifneq ($(KBUILD_SRC),)
805 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e2242005-07-14 20:22:39 +0000806 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 echo " $(srctree) is not clean, please run 'make mrproper'";\
808 echo " in the '$(srctree)' directory.";\
809 /bin/false; \
810 fi;
811 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
812 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
813endif
814
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200815# prepare2 creates a makefile if using a separate output directory
816prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200818prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e2242005-07-14 20:22:39 +0000819 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820ifneq ($(KBUILD_MODULES),)
821 $(Q)rm -rf $(MODVERDIR)
822 $(Q)mkdir -p $(MODVERDIR)
823endif
824
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200825archprepare: prepare1 scripts_basic
826
827prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200828 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200831prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833# Leave this as default for preprocessing vmlinux.lds.S, which is now
834# done in arch/$(ARCH)/kernel/Makefile
835
836export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
837
838# Single targets
839# ---------------------------------------------------------------------------
840
841%.s: %.c scripts FORCE
842 $(Q)$(MAKE) $(build)=$(@D) $@
843%.i: %.c scripts FORCE
844 $(Q)$(MAKE) $(build)=$(@D) $@
845%.o: %.c scripts FORCE
846 $(Q)$(MAKE) $(build)=$(@D) $@
Sam Ravnborg155ad602005-07-07 17:56:08 -0700847%.ko: scripts FORCE
848 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
849 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850%/: scripts prepare FORCE
851 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
852%.lst: %.c scripts FORCE
853 $(Q)$(MAKE) $(build)=$(@D) $@
854%.s: %.S scripts FORCE
855 $(Q)$(MAKE) $(build)=$(@D) $@
856%.o: %.S scripts FORCE
857 $(Q)$(MAKE) $(build)=$(@D) $@
858
859# FIXME: The asm symlink changes when $(ARCH) changes. That's
860# hard to detect, but I suppose "make mrproper" is a good idea
861# before switching between archs anyway.
862
863include/asm:
864 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
865 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
866 @ln -fsn asm-$(ARCH) $@
867
868# Split autoconf.h into include/linux/config/*
869
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200870include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
872 @scripts/basic/split-include include/linux/autoconf.h include/config
873 @touch $@
874
875# Generate some files
876# ---------------------------------------------------------------------------
877
878# KERNELRELEASE can change from a few different places, meaning version.h
879# needs to be updated, so this check is forced on all builds
880
881uts_len := 64
882
883define filechk_version.h
884 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
885 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
886 exit 1; \
887 fi; \
888 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
889 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
890 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
891 )
892endef
893
894include/linux/version.h: $(srctree)/Makefile FORCE
895 $(call filechk,version.h)
896
897# ---------------------------------------------------------------------------
898
899.PHONY: depend dep
900depend dep:
901 @echo '*** Warning: make $@ is unnecessary now.'
902
903# ---------------------------------------------------------------------------
904# Modules
905
906ifdef CONFIG_MODULES
907
908# By default, build modules as well
909
910all: modules
911
912# Build modules
913
914.PHONY: modules
915modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
916 @echo ' Building modules, stage 2.';
917 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
918
919
920# Target to prepare building external modules
921.PHONY: modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200922modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
924# Target to install modules
925.PHONY: modules_install
926modules_install: _modinst_ _modinst_post
927
928.PHONY: _modinst_
929_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700930 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 echo "Warning: you may need to install module-init-tools"; \
932 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
933 sleep 1; \
934 fi
935 @rm -rf $(MODLIB)/kernel
936 @rm -f $(MODLIB)/source
937 @mkdir -p $(MODLIB)/kernel
938 @ln -s $(srctree) $(MODLIB)/source
939 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
940 rm -f $(MODLIB)/build ; \
941 ln -s $(objtree) $(MODLIB)/build ; \
942 fi
943 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
944
945# If System.map exists, run depmod. This deliberately does not have a
946# dependency on System.map since that would run the dependency tree on
947# vmlinux. This depmod is only for convenience to give the initial
948# boot a modules.dep even before / is mounted read-write. However the
949# boot script depmod is the master version.
950ifeq "$(strip $(INSTALL_MOD_PATH))" ""
951depmod_opts :=
952else
953depmod_opts := -b $(INSTALL_MOD_PATH) -r
954endif
955.PHONY: _modinst_post
956_modinst_post: _modinst_
957 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
958
959else # CONFIG_MODULES
960
961# Modules not configured
962# ---------------------------------------------------------------------------
963
964modules modules_install: FORCE
965 @echo
966 @echo "The present kernel configuration has modules disabled."
967 @echo "Type 'make config' and enable loadable module support."
968 @echo "Then build a kernel with module support enabled."
969 @echo
970 @exit 1
971
972endif # CONFIG_MODULES
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974###
975# Cleaning is done on three levels.
976# make clean Delete most generated files
977# Leave enough to build external modules
978# make mrproper Delete the current configuration, and all generated files
979# make distclean Remove editor backup files, patch leftover files and the like
980
981# Directories & files removed with 'make clean'
982CLEAN_DIRS += $(MODVERDIR)
983CLEAN_FILES += vmlinux System.map \
984 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
985
986# Directories & files removed with 'make mrproper'
987MRPROPER_DIRS += include/config include2
988MRPROPER_FILES += .config .config.old include/asm .version \
989 include/linux/autoconf.h include/linux/version.h \
990 Module.symvers tags TAGS cscope*
991
992# clean - Delete most, but leave enough to build external modules
993#
994clean: rm-dirs := $(CLEAN_DIRS)
995clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200996clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997
998.PHONY: $(clean-dirs) clean archclean
999$(clean-dirs):
1000 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1001
1002clean: archclean $(clean-dirs)
1003 $(call cmd,rmdirs)
1004 $(call cmd,rmfiles)
1005 @find . $(RCS_FIND_IGNORE) \
1006 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1007 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1008 -type f -print | xargs rm -f
1009
1010# mrproper - Delete all generated files, including .config
1011#
1012mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1013mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1014mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1015
1016.PHONY: $(mrproper-dirs) mrproper archmrproper
1017$(mrproper-dirs):
1018 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1019
1020mrproper: clean archmrproper $(mrproper-dirs)
1021 $(call cmd,rmdirs)
1022 $(call cmd,rmfiles)
1023
1024# distclean
1025#
1026.PHONY: distclean
1027
1028distclean: mrproper
1029 @find $(srctree) $(RCS_FIND_IGNORE) \
1030 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1031 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1032 -o -name '.*.rej' -o -size 0 \
1033 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1034 -type f -print | xargs rm -f
1035
1036
1037# Packaging of the kernel to various formats
1038# ---------------------------------------------------------------------------
1039# rpm target kept for backward compatibility
1040package-dir := $(srctree)/scripts/package
1041
1042.PHONY: %-pkg rpm
1043
1044%pkg: FORCE
1045 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1046rpm: FORCE
1047 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1048
1049
1050# Brief documentation of the typical targets used
1051# ---------------------------------------------------------------------------
1052
1053boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1054boards := $(notdir $(boards))
1055
1056help:
1057 @echo 'Cleaning targets:'
1058 @echo ' clean - remove most generated files but keep the config'
1059 @echo ' mrproper - remove all generated files + config + various backup files'
1060 @echo ''
1061 @echo 'Configuration targets:'
1062 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1063 @echo ''
1064 @echo 'Other generic targets:'
1065 @echo ' all - Build all targets marked with [*]'
1066 @echo '* vmlinux - Build the bare kernel'
1067 @echo '* modules - Build all modules'
1068 @echo ' modules_install - Install all modules'
1069 @echo ' dir/ - Build all files in dir and below'
1070 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001071 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 @echo ' rpm - Build a kernel as an RPM package'
1073 @echo ' tags/TAGS - Generate tags file for editors'
1074 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001075 @echo ' kernelrelease - Output the release version string'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 @echo ''
1077 @echo 'Static analysers'
1078 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1079 @echo ' and init sections from non-init sections'
1080 @echo ' checkstack - Generate a list of stack hogs'
1081 @echo ' namespacecheck - Name space analysis on compiled kernel'
1082 @echo ''
1083 @echo 'Kernel packaging:'
1084 @$(MAKE) -f $(package-dir)/Makefile help
1085 @echo ''
1086 @echo 'Documentation targets:'
1087 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1088 @echo ''
1089 @echo 'Architecture specific targets ($(ARCH)):'
1090 @$(if $(archhelp),$(archhelp),\
1091 echo ' No architecture specific help defined for $(ARCH)')
1092 @echo ''
1093 @$(if $(boards), \
1094 $(foreach b, $(boards), \
1095 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1096 echo '')
1097
1098 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1099 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1100 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1101 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1102 @echo ''
1103 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1104 @echo 'For further info see the ./README file'
1105
1106
1107# Documentation targets
1108# ---------------------------------------------------------------------------
1109%docs: scripts_basic FORCE
1110 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1111
1112else # KBUILD_EXTMOD
1113
1114###
1115# External module support.
1116# When building external modules the kernel used as basis is considered
1117# read-only, and no consistency checks are made and the make
1118# system is not used on the basis kernel. If updates are required
1119# in the basis kernel ordinary make commands (without M=...) must
1120# be used.
1121#
1122# The following are the only valid targets when building external
1123# modules.
1124# make M=dir clean Delete all automatically generated files
1125# make M=dir modules Make all modules in specified dir
1126# make M=dir Same as 'make M=dir modules'
1127# make M=dir modules_install
1128# Install the modules build in the module directory
1129# Assumes install directory is already created
1130
1131# We are always building modules
1132KBUILD_MODULES := 1
1133.PHONY: crmodverdir
1134crmodverdir:
1135 $(Q)mkdir -p $(MODVERDIR)
1136
1137.PHONY: $(objtree)/Module.symvers
1138$(objtree)/Module.symvers:
1139 @test -e $(objtree)/Module.symvers || ( \
1140 echo; \
1141 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1142 echo " is missing; modules will have no dependencies and modversions."; \
1143 echo )
1144
1145module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1146.PHONY: $(module-dirs) modules
1147$(module-dirs): crmodverdir $(objtree)/Module.symvers
1148 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1149
1150modules: $(module-dirs)
1151 @echo ' Building modules, stage 2.';
1152 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1153
1154.PHONY: modules_install
1155modules_install:
1156 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1157
1158clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1159
1160.PHONY: $(clean-dirs) clean
1161$(clean-dirs):
1162 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1163
1164clean: rm-dirs := $(MODVERDIR)
1165clean: $(clean-dirs)
1166 $(call cmd,rmdirs)
1167 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1168 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1169 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1170 -type f -print | xargs rm -f
1171
1172help:
1173 @echo ' Building external modules.'
1174 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1175 @echo ''
1176 @echo ' modules - default target, build the module(s)'
1177 @echo ' modules_install - install the module'
1178 @echo ' clean - remove generated files in module directory only'
1179 @echo ''
1180endif # KBUILD_EXTMOD
1181
1182# Generate tags for editors
1183# ---------------------------------------------------------------------------
1184
1185#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1186#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1187#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1188
George Anzingerf182ae62005-07-07 17:56:06 -07001189ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190__srctree =
1191else
1192__srctree = $(srctree)/
1193endif
1194
Ian Campbella0674e82005-06-23 11:25:54 +01001195ALLSOURCE_ARCHS := $(ARCH)
1196
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197define all-sources
1198 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1199 \( -name include -o -name arch \) -prune -o \
1200 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001201 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1202 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1203 -name '*.[chS]' -print; \
1204 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1206 -name '*.[chS]' -print; \
1207 find $(__srctree)include $(RCS_FIND_IGNORE) \
1208 \( -name config -o -name 'asm-*' \) -prune \
1209 -o -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001210 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1211 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1212 -name '*.[chS]' -print; \
1213 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1215 -name '*.[chS]' -print )
1216endef
1217
1218quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001219 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220
1221quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001222 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224cscope: FORCE
1225 $(call cmd,cscope-file)
1226 $(call cmd,cscope)
1227
1228quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001229define cmd_TAGS
1230 rm -f $@; \
1231 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1232 $(all-sources) | xargs etags $$ETAGSF -a
1233endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001235TAGS: FORCE
1236 $(call cmd,TAGS)
1237
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
1239quiet_cmd_tags = MAKE $@
1240define cmd_tags
1241 rm -f $@; \
Emanuele Giaquintaefcd5e32005-05-01 08:59:15 -07001242 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1243 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244endef
1245
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246tags: FORCE
1247 $(call cmd,tags)
1248
1249
1250# Scripts to check various things for consistency
1251# ---------------------------------------------------------------------------
1252
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253includecheck:
1254 find * $(RCS_FIND_IGNORE) \
1255 -name '*.[hcS]' -type f -print | sort \
1256 | xargs $(PERL) -w scripts/checkincludes.pl
1257
1258versioncheck:
1259 find * $(RCS_FIND_IGNORE) \
1260 -name '*.[hcS]' -type f -print | sort \
1261 | xargs $(PERL) -w scripts/checkversion.pl
1262
1263buildcheck:
1264 $(PERL) $(srctree)/scripts/reference_discarded.pl
1265 $(PERL) $(srctree)/scripts/reference_init.pl
1266
1267namespacecheck:
1268 $(PERL) $(srctree)/scripts/namespace.pl
1269
1270endif #ifeq ($(config-targets),1)
1271endif #ifeq ($(mixed-targets),1)
1272
1273.PHONY: checkstack
1274checkstack:
1275 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1276 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1277
1278kernelrelease:
1279 @echo $(KERNELRELEASE)
1280
1281# FIXME Should go into a make.lib or something
1282# ===========================================================================
1283
1284quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1285 cmd_rmdirs = rm -rf $(rm-dirs)
1286
1287quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1288 cmd_rmfiles = rm -f $(rm-files)
1289
1290
1291a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1292 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1293 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1294
1295quiet_cmd_as_o_S = AS $@
1296cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1297
1298# read all saved command lines
1299
1300targets := $(wildcard $(sort $(targets)))
1301cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1302
1303ifneq ($(cmd_files),)
1304 $(cmd_files): ; # Do not try to update included dependency files
1305 include $(cmd_files)
1306endif
1307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1309# Usage:
1310# $(Q)$(MAKE) $(clean)=dir
1311clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313endif # skip-makefile
1314
1315FORCE: