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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
Sam Ravnborg296e0852006-01-15 20:02:31 +0100109.PHONY: $(MAKECMDGOALS) cdbuilddir
110$(MAKECMDGOALS) _all: cdbuilddir
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Sam Ravnborg296e0852006-01-15 20:02:31 +0100112cdbuilddir:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200113 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
114 KBUILD_SRC=$(CURDIR) \
Sam Ravnborg296e0852006-01-15 20:02:31 +0100115 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117# Leave processing to above invocation of make
118skip-makefile := 1
119endif # ifneq ($(KBUILD_OUTPUT),)
120endif # ifeq ($(KBUILD_SRC),)
121
122# We process the rest of the Makefile if this is the final invocation of make
123ifeq ($(skip-makefile),)
124
125# If building an external module we do not care about the all: rule
126# but instead _all depend on modules
127.PHONY: all
128ifeq ($(KBUILD_EXTMOD),)
129_all: all
130else
131_all: modules
132endif
133
134srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135TOPDIR := $(srctree)
136# FIXME - TOPDIR is obsolete, use srctree/objtree
137objtree := $(CURDIR)
138src := $(srctree)
139obj := $(objtree)
140
141VPATH := $(srctree)
142
143export srctree objtree VPATH TOPDIR
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146# SUBARCH tells the usermode build what the underlying arch is. That is set
147# first, and if a usermode build is happening, the "ARCH=um" on the command
148# line overrides the setting of ARCH below. If a native build is happening,
149# then ARCH is assigned, getting whatever value it gets normally, and
150# SUBARCH is subsequently ignored.
151
152SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
153 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800154 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mackerras820a8ce2006-01-15 17:33:52 +1100155 -e s/ppc.*/powerpc/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157# Cross compiling and selecting different set of gcc/bin-utils
158# ---------------------------------------------------------------------------
159#
160# When performing cross compilation for other architectures ARCH shall be set
161# to the target architecture. (See arch/* for the possibilities).
162# ARCH can be set during invocation of make:
163# make ARCH=ia64
164# Another way is to have ARCH set in the environment.
165# The default ARCH is the host where make is executed.
166
167# CROSS_COMPILE specify the prefix used for all executables used
168# during compilation. Only gcc and related bin-utils executables
169# are prefixed with $(CROSS_COMPILE).
170# CROSS_COMPILE can be set on the command line
171# make CROSS_COMPILE=ia64-linux-
172# Alternatively CROSS_COMPILE can be set in the environment.
173# Default value for CROSS_COMPILE is not to prefix executables
174# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
175
176ARCH ?= $(SUBARCH)
177CROSS_COMPILE ?=
178
179# Architecture as present in compile.h
180UTS_MACHINE := $(ARCH)
181
182# SHELL used by kbuild
183CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
184 else if [ -x /bin/bash ]; then echo /bin/bash; \
185 else echo sh; fi ; fi)
186
187HOSTCC = gcc
188HOSTCXX = g++
189HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
190HOSTCXXFLAGS = -O2
191
192# Decide whether to build built-in, modular, or both.
193# Normally, just do built-in.
194
195KBUILD_MODULES :=
196KBUILD_BUILTIN := 1
197
198# If we have only "make modules", don't compile built-in objects.
199# When we're building modules with modversions, we need to consider
200# the built-in objects during the descend as well, in order to
201# make sure the checksums are uptodate before we record them.
202
203ifeq ($(MAKECMDGOALS),modules)
204 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
205endif
206
207# If we have "make <whatever> modules", compile modules
208# in addition to whatever we do anyway.
209# Just "make" or "make all" shall build modules as well
210
211ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
212 KBUILD_MODULES := 1
213endif
214
215ifeq ($(MAKECMDGOALS),)
216 KBUILD_MODULES := 1
217endif
218
Sam Ravnborge579d352005-07-27 08:10:10 +0200219export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
221
222# Beautify output
223# ---------------------------------------------------------------------------
224#
225# Normally, we echo the whole command before executing it. By making
226# that echo $($(quiet)$(cmd)), we now have the possibility to set
227# $(quiet) to choose other forms of output instead, e.g.
228#
229# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
230# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
231#
232# If $(quiet) is empty, the whole command will be printed.
233# If it is set to "quiet_", only the short version will be printed.
234# If it is set to "silent_", nothing wil be printed at all, since
235# the variable $(silent_cmd_cc_o_c) doesn't exist.
236#
Adrian Bunka58a4142006-01-10 00:08:17 +0100237# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238# for commands that shall be hidden in non-verbose mode.
239#
240# $(Q)ln $@ :<
241#
242# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
243# If KBUILD_VERBOSE equals 1 then the above command is displayed.
244
245ifeq ($(KBUILD_VERBOSE),1)
246 quiet =
247 Q =
248else
249 quiet=quiet_
250 Q = @
251endif
252
253# If the user is running make -s (silent mode), suppress echoing of
254# commands
255
256ifneq ($(findstring s,$(MAKEFLAGS)),)
257 quiet=silent_
258endif
259
260export quiet Q KBUILD_VERBOSE
261
262######
263# cc support functions to be used (only) in arch/$(ARCH)/Makefile
264# See documentation in Documentation/kbuild/makefiles.txt
265
Paul Mundtcad82442006-01-16 22:14:19 -0800266# as-option
267# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
268
269as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
270 -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
271 else echo "$(2)"; fi ;)
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273# cc-option
Alexey Dobriyanae67cd62005-06-25 14:55:36 -0700274# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
276cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
277 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279# cc-option-yn
280# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
281cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
282 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
283
284# cc-option-align
285# Prefix align with either -falign or -malign
286cc-option-align = $(subst -functions=0,,\
287 $(call cc-option,-falign-functions=0,-malign-functions=0))
288
289# cc-version
290# Usage gcc-ver := $(call cc-version $(CC))
291cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
292 $(if $(1), $(1), $(CC)))
293
294
295# Look for make include files relative to root of kernel src
296MAKEFLAGS += --include-dir=$(srctree)
297
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000298# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000299include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301# For maximum performance (+ possibly random breakage, uncomment
302# the following)
303
304#MAKEFLAGS += -rR
305
306# Make variables (CC, etc...)
307
308AS = $(CROSS_COMPILE)as
309LD = $(CROSS_COMPILE)ld
310CC = $(CROSS_COMPILE)gcc
311CPP = $(CC) -E
312AR = $(CROSS_COMPILE)ar
313NM = $(CROSS_COMPILE)nm
314STRIP = $(CROSS_COMPILE)strip
315OBJCOPY = $(CROSS_COMPILE)objcopy
316OBJDUMP = $(CROSS_COMPILE)objdump
317AWK = awk
318GENKSYMS = scripts/genksyms/genksyms
319DEPMOD = /sbin/depmod
320KALLSYMS = scripts/kallsyms
321PERL = perl
322CHECK = sparse
323
Al Viroaf4ca452005-10-21 02:55:38 -0400324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325MODFLAGS = -DMODULE
326CFLAGS_MODULE = $(MODFLAGS)
327AFLAGS_MODULE = $(MODFLAGS)
328LDFLAGS_MODULE = -r
329CFLAGS_KERNEL =
330AFLAGS_KERNEL =
331
332
333# Use LINUXINCLUDE when you must reference the include/ directory.
334# Needed to be compatible with the O= option
335LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100336 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800337 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
340
Olaf Hering3c521e02005-07-21 21:02:09 +0200341CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 -fno-strict-aliasing -fno-common \
343 -ffreestanding
344AFLAGS := -D__ASSEMBLY__
345
Sam Ravnborgcb584552006-01-09 21:20:34 +0100346# Read KERNELRELEASE from .kernelrelease (if it exists)
347KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100348KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100349
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100350export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
352 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
353 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
354
355export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
356export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
357export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
358
359# When compiling out-of-tree modules, put MODVERDIR in the module
360# tree rather than in the kernel tree. The kernel tree might
361# even be read-only.
362export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
363
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364# Files to ignore in find ... statements
365
Trond Myklebust406119f2005-10-27 14:46:53 -0400366RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
367export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369# ===========================================================================
370# Rules shared between *config targets and build targets
371
372# Basic helpers built in scripts/
373.PHONY: scripts_basic
374scripts_basic:
375 $(Q)$(MAKE) $(build)=scripts/basic
376
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200377# To avoid any implicit rule to kick in, define an empty command.
378scripts/basic/%: scripts_basic ;
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380.PHONY: outputmakefile
381# outputmakefile generate a Makefile to be placed in output directory, if
382# using a seperate output directory. This allows convinient use
383# of make in output directory
384outputmakefile:
385 $(Q)if test ! $(srctree) -ef $(objtree); then \
386 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
387 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
388 > $(objtree)/Makefile; \
389 echo ' GEN $(objtree)/Makefile'; \
390 fi
391
392# To make sure we do not include .config for any of the *config targets
393# catch them early, and hand them over to scripts/kconfig/Makefile
394# It is allowed to specify more targets when calling make, including
395# mixing *config targets and build targets.
396# For example 'make oldconfig all'.
397# Detect when mixed targets is specified, and make a second invocation
398# of make so .config is not included in this case either (for *config).
399
400no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800401 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403config-targets := 0
404mixed-targets := 0
405dot-config := 1
406
407ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
408 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
409 dot-config := 0
410 endif
411endif
412
413ifeq ($(KBUILD_EXTMOD),)
414 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
415 config-targets := 1
416 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
417 mixed-targets := 1
418 endif
419 endif
420endif
421
422ifeq ($(mixed-targets),1)
423# ===========================================================================
424# We're called with mixed targets (*config and build targets).
425# Handle them one by one.
426
427%:: FORCE
428 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
429
430else
431ifeq ($(config-targets),1)
432# ===========================================================================
433# *config targets only - make sure prerequisites are updated, and descend
434# in scripts/kconfig to make the *config target
435
436# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
437# KBUILD_DEFCONFIG may point out an alternative default configuration
438# used for 'make defconfig'
439include $(srctree)/arch/$(ARCH)/Makefile
440export KBUILD_DEFCONFIG
441
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200442config %config: scripts_basic outputmakefile FORCE
443 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 $(Q)$(MAKE) $(build)=scripts/kconfig $@
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100445 $(Q)$(MAKE) .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447else
448# ===========================================================================
449# Build targets only - this includes vmlinux, arch specific targets, clean
450# targets and others. In general all targets except *config targets.
451
452ifeq ($(KBUILD_EXTMOD),)
453# Additional helpers built in scripts/
454# Carefully list dependencies so we do not try to build scripts twice
455# in parrallel
456.PHONY: scripts
457scripts: scripts_basic include/config/MARKER
458 $(Q)$(MAKE) $(build)=$(@)
459
460scripts_basic: include/linux/autoconf.h
461
462# Objects we will link into vmlinux / subdirs we need to visit
463init-y := init/
464drivers-y := drivers/ sound/
465net-y := net/
466libs-y := lib/
467core-y := usr/
468endif # KBUILD_EXTMOD
469
470ifeq ($(dot-config),1)
471# In this section, we need .config
472
473# Read in dependencies to all Kconfig* files, make sure to run
474# oldconfig if changes are detected.
Sam Ravnborg752625c2005-12-26 23:34:03 +0100475-include .kconfig.d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477include .config
478
479# If .config needs to be updated, it will be done via the dependency
480# that autoconf has on .config.
481# To avoid any implicit rule to kick in, define an empty command
Sam Ravnborg752625c2005-12-26 23:34:03 +0100482.config .kconfig.d: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484# If .config is newer than include/linux/autoconf.h, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100485# with it and forgot to run make oldconfig.
486# If kconfig.d is missing then we are probarly in a cleaned tree so
487# we execute the config step to be sure to catch updated Kconfig files
488include/linux/autoconf.h: .kconfig.d .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200489 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
491else
492# Dummy target needed, because used as prerequisite
493include/linux/autoconf.h: ;
494endif
495
496# The all: target is the default when no target is given on the
497# command line.
498# This allow a user to issue only 'make' to build a kernel including modules
499# Defaults vmlinux but it is usually overriden in the arch makefile
500all: vmlinux
501
502ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
503CFLAGS += -Os
504else
505CFLAGS += -O2
506endif
507
508#Add align options if CONFIG_CC_* is not equal to 0
509add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
510CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
511CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
512CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
513CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
514
515ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700516CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517else
518CFLAGS += -fomit-frame-pointer
519endif
520
521ifdef CONFIG_DEBUG_INFO
522CFLAGS += -g
523endif
524
525include $(srctree)/arch/$(ARCH)/Makefile
526
Sam Ravnborge8e69932005-04-30 16:51:42 -0700527# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700528NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700529CHECKFLAGS += $(NOSTDINC_FLAGS)
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531# warn about C99 declaration after statement
532CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
533
534# disable pointer signedness warnings in gcc 4.0
535CFLAGS += $(call cc-option,-Wno-pointer-sign,)
536
537# Default kernel image to build when no specific target is given.
538# KBUILD_IMAGE may be overruled on the commandline or
539# set in the environment
540# Also any assignments in arch/$(ARCH)/Makefile take precedence over
541# this default value
542export KBUILD_IMAGE ?= vmlinux
543
544#
545# INSTALL_PATH specifies where to place the updated kernel and system map
546# images. Default is /boot, but you can set it to other values
547export INSTALL_PATH ?= /boot
548
549#
550# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
551# relocations required by build roots. This is not defined in the
552# makefile but the arguement can be passed to make if needed.
553#
554
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100555MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556export MODLIB
557
558
559ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100560core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
563 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
564 $(net-y) $(net-m) $(libs-y) $(libs-m)))
565
566vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
567 $(init-n) $(init-) \
568 $(core-n) $(core-) $(drivers-n) $(drivers-) \
569 $(net-n) $(net-) $(libs-n) $(libs-))))
570
571init-y := $(patsubst %/, %/built-in.o, $(init-y))
572core-y := $(patsubst %/, %/built-in.o, $(core-y))
573drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
574net-y := $(patsubst %/, %/built-in.o, $(net-y))
575libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
576libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
577libs-y := $(libs-y1) $(libs-y2)
578
579# Build vmlinux
580# ---------------------------------------------------------------------------
581# vmlinux is build from the objects selected by $(vmlinux-init) and
582# $(vmlinux-main). Most are built-in.o files from top-level directories
583# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
584# Ordering when linking is important, and $(vmlinux-init) must be first.
585#
586# vmlinux
587# ^
588# |
589# +-< $(vmlinux-init)
590# | +--< init/version.o + more
591# |
592# +--< $(vmlinux-main)
593# | +--< driver/built-in.o mm/built-in.o + more
594# |
595# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
596#
597# vmlinux version (uname -v) cannot be updated during normal
598# descending-into-subdirs phase since we do not yet know if we need to
599# update vmlinux.
600# Therefore this step is delayed until just before final link of vmlinux -
601# except in the kallsyms case where it is done just before adding the
602# symbols to the kernel.
603#
604# System.map is generated to document addresses of all kernel symbols
605
606vmlinux-init := $(head-y) $(init-y)
607vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
608vmlinux-all := $(vmlinux-init) $(vmlinux-main)
609vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
610
611# Rule to link vmlinux - also used during CONFIG_KALLSYMS
612# May be overridden by arch/$(ARCH)/Makefile
613quiet_cmd_vmlinux__ ?= LD $@
614 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
615 -T $(vmlinux-lds) $(vmlinux-init) \
616 --start-group $(vmlinux-main) --end-group \
617 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
618
619# Generate new vmlinux version
620quiet_cmd_vmlinux_version = GEN .version
621 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200622 if [ ! -r .version ]; then \
623 rm -f .version; \
624 echo 1 >.version; \
625 else \
626 mv .version .old_version; \
627 expr 0$$(cat .old_version) + 1 >.version; \
628 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 $(MAKE) $(build)=init
630
631# Generate System.map
632quiet_cmd_sysmap = SYSMAP
633 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
634
635# Link of vmlinux
636# If CONFIG_KALLSYMS is set .version is already updated
637# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700638# Use + in front of the vmlinux_version rule to silent warning with make -j2
639# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700641 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
643
644 $(call cmd,vmlinux__)
645 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
646
647 $(Q)$(if $($(quiet)cmd_sysmap), \
648 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
649 $(cmd_sysmap) $@ System.map; \
650 if [ $$? -ne 0 ]; then \
651 rm -f $@; \
652 /bin/false; \
653 fi;
654 $(verify_kallsyms)
655endef
656
657
658ifdef CONFIG_KALLSYMS
659# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
660# It's a three stage process:
661# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
662# empty
663# Running kallsyms on that gives us .tmp_kallsyms1.o with
664# the right size - vmlinux version (uname -v) is updated during this step
665# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
666# but due to the added section, some addresses have shifted.
667# From here, we generate a correct .tmp_kallsyms2.o
668# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
669# o Verify that the System.map from vmlinux matches the map from
670# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
671# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
672# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
673# temporary bypass to allow the kernel to be built while the
674# maintainers work out what went wrong with kallsyms.
675
676ifdef CONFIG_KALLSYMS_EXTRA_PASS
677last_kallsyms := 3
678else
679last_kallsyms := 2
680endif
681
682kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
683
684define verify_kallsyms
685 $(Q)$(if $($(quiet)cmd_sysmap), \
686 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
687 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
688 $(Q)cmp -s System.map .tmp_System.map || \
689 (echo Inconsistent kallsyms data; \
690 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
691 rm .tmp_kallsyms* ; /bin/false )
692endef
693
694# Update vmlinux version before link
695# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200696# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697cmd_ksym_ld = $(cmd_vmlinux__)
698define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200699 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 +$(call cmd,vmlinux_version)
701 $(call cmd,vmlinux__)
702 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
703endef
704
705# Generate .S file with all kernel symbols
706quiet_cmd_kallsyms = KSYM $@
707 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
708 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
709
710.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
711 $(call if_changed_dep,as_o_S)
712
713.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
714 $(call cmd,kallsyms)
715
716# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
717.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
718 $(call if_changed_rule,ksym_ld)
719
720.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
721 $(call if_changed,vmlinux__)
722
723.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
724 $(call if_changed,vmlinux__)
725
726# Needs to visit scripts/ before $(KALLSYMS) can be used.
727$(KALLSYMS): scripts ;
728
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000729# Generate some data for debugging strange kallsyms problems
730debug_kallsyms: .tmp_map$(last_kallsyms)
731
732.tmp_map%: .tmp_vmlinux% FORCE
733 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
734
735.tmp_map3: .tmp_map2
736
737.tmp_map2: .tmp_map1
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739endif # ifdef CONFIG_KALLSYMS
740
741# vmlinux image - including updated kernel symbols
742vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
743 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200744 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746# The actual objects are generated when descending,
747# make sure no implicit rule kicks in
748$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
749
750# Handle descending into subdirectories listed in $(vmlinux-dirs)
751# Preset locale variables to speed up the build process. Limit locale
752# tweaks to this spot to avoid wrong language settings when running
753# make menuconfig etc.
754# Error messages still appears in the original language
755
756.PHONY: $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200757$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 $(Q)$(MAKE) $(build)=$@
759
Sam Ravnborgcb584552006-01-09 21:20:34 +0100760# Build the kernel release string
761# The KERNELRELEASE is stored in a file named .kernelrelease
762# to be used when executing for example make install or make modules_install
763#
764# Take the contents of any files called localversion* and the config
765# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
766# LOCALVERSION from the command line override all of this
767
768nullstring :=
769space := $(nullstring) # end of line
770
771___localver = $(objtree)/localversion* $(srctree)/localversion*
772__localver = $(sort $(wildcard $(___localver)))
773# skip backup files (containing '~')
774_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
775
776localver = $(subst $(space),, \
777 $(shell cat /dev/null $(_localver)) \
778 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
779
780# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
781# and if the SCM is know a tag from the SCM is appended.
782# The appended tag is determinded by the SCM used.
783#
784# Currently, only git is supported.
785# Other SCMs can edit scripts/setlocalversion and add the appropriate
786# checks as needed.
787ifdef CONFIG_LOCALVERSION_AUTO
788 _localver-auto = $(shell $(CONFIG_SHELL) \
789 $(srctree)/scripts/setlocalversion $(srctree))
790 localver-auto = $(LOCALVERSION)$(_localver-auto)
791endif
792
793localver-full = $(localver)$(localver-auto)
794
795# Store (new) KERNELRELASE string in .kernelrelease
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100796kernelrelease = $(KERNELVERSION)$(localver-full)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100797.kernelrelease: FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100798 $(Q)rm -f $@
799 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100800
801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200803# or the modules are listed in "prepare".
804# A multi level approach is used. prepareN is processed before prepareN-1.
805# archprepare is used in arch Makefiles and when processed asm symlink,
806# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200808# Listed in dependency order
809.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
810
811# prepare-all is deprecated, use prepare as valid replacement
812.PHONY: prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200814# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815# and if so do:
816# 1) Check that make has not been executed in the kernel src $(srctree)
817# 2) Create the include2 directory, used for the second asm symlink
Sam Ravnborgcb584552006-01-09 21:20:34 +0100818prepare3: .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819ifneq ($(KBUILD_SRC),)
820 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000821 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 echo " $(srctree) is not clean, please run 'make mrproper'";\
823 echo " in the '$(srctree)' directory.";\
824 /bin/false; \
825 fi;
826 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
827 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
828endif
829
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200830# prepare2 creates a makefile if using a separate output directory
831prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200833prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000834 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835ifneq ($(KBUILD_MODULES),)
836 $(Q)rm -rf $(MODVERDIR)
837 $(Q)mkdir -p $(MODVERDIR)
838endif
839
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200840archprepare: prepare1 scripts_basic
841
842prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200843 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200846prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
848# Leave this as default for preprocessing vmlinux.lds.S, which is now
849# done in arch/$(ARCH)/kernel/Makefile
850
851export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
852
853# Single targets
854# ---------------------------------------------------------------------------
855
856%.s: %.c scripts FORCE
857 $(Q)$(MAKE) $(build)=$(@D) $@
858%.i: %.c scripts FORCE
859 $(Q)$(MAKE) $(build)=$(@D) $@
860%.o: %.c scripts FORCE
861 $(Q)$(MAKE) $(build)=$(@D) $@
Sam Ravnborg155ad602005-07-07 17:56:08 -0700862%.ko: scripts FORCE
863 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
864 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865%/: scripts prepare FORCE
866 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
867%.lst: %.c scripts FORCE
868 $(Q)$(MAKE) $(build)=$(@D) $@
869%.s: %.S scripts FORCE
870 $(Q)$(MAKE) $(build)=$(@D) $@
871%.o: %.S scripts FORCE
872 $(Q)$(MAKE) $(build)=$(@D) $@
873
874# FIXME: The asm symlink changes when $(ARCH) changes. That's
875# hard to detect, but I suppose "make mrproper" is a good idea
876# before switching between archs anyway.
877
878include/asm:
879 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
880 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
881 @ln -fsn asm-$(ARCH) $@
882
883# Split autoconf.h into include/linux/config/*
884
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200885include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
887 @scripts/basic/split-include include/linux/autoconf.h include/config
888 @touch $@
889
890# Generate some files
891# ---------------------------------------------------------------------------
892
893# KERNELRELEASE can change from a few different places, meaning version.h
894# needs to be updated, so this check is forced on all builds
895
896uts_len := 64
897
898define filechk_version.h
899 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
900 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
901 exit 1; \
902 fi; \
903 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
904 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
905 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
906 )
907endef
908
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100909include/linux/version.h: $(srctree)/Makefile .config FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 $(call filechk,version.h)
911
912# ---------------------------------------------------------------------------
913
914.PHONY: depend dep
915depend dep:
916 @echo '*** Warning: make $@ is unnecessary now.'
917
918# ---------------------------------------------------------------------------
919# Modules
920
921ifdef CONFIG_MODULES
922
923# By default, build modules as well
924
925all: modules
926
927# Build modules
928
929.PHONY: modules
930modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
931 @echo ' Building modules, stage 2.';
932 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
933
934
935# Target to prepare building external modules
936.PHONY: modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200937modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
939# Target to install modules
940.PHONY: modules_install
941modules_install: _modinst_ _modinst_post
942
943.PHONY: _modinst_
944_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700945 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 echo "Warning: you may need to install module-init-tools"; \
947 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
948 sleep 1; \
949 fi
950 @rm -rf $(MODLIB)/kernel
951 @rm -f $(MODLIB)/source
952 @mkdir -p $(MODLIB)/kernel
953 @ln -s $(srctree) $(MODLIB)/source
954 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
955 rm -f $(MODLIB)/build ; \
956 ln -s $(objtree) $(MODLIB)/build ; \
957 fi
958 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
959
960# If System.map exists, run depmod. This deliberately does not have a
961# dependency on System.map since that would run the dependency tree on
962# vmlinux. This depmod is only for convenience to give the initial
963# boot a modules.dep even before / is mounted read-write. However the
964# boot script depmod is the master version.
965ifeq "$(strip $(INSTALL_MOD_PATH))" ""
966depmod_opts :=
967else
968depmod_opts := -b $(INSTALL_MOD_PATH) -r
969endif
970.PHONY: _modinst_post
971_modinst_post: _modinst_
972 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
973
974else # CONFIG_MODULES
975
976# Modules not configured
977# ---------------------------------------------------------------------------
978
979modules modules_install: FORCE
980 @echo
981 @echo "The present kernel configuration has modules disabled."
982 @echo "Type 'make config' and enable loadable module support."
983 @echo "Then build a kernel with module support enabled."
984 @echo
985 @exit 1
986
987endif # CONFIG_MODULES
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989###
990# Cleaning is done on three levels.
991# make clean Delete most generated files
992# Leave enough to build external modules
993# make mrproper Delete the current configuration, and all generated files
994# make distclean Remove editor backup files, patch leftover files and the like
995
996# Directories & files removed with 'make clean'
997CLEAN_DIRS += $(MODVERDIR)
998CLEAN_FILES += vmlinux System.map \
999 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1000
1001# Directories & files removed with 'make mrproper'
1002MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +01001003MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 include/linux/autoconf.h include/linux/version.h \
Sam Ravnborgcb584552006-01-09 21:20:34 +01001005 .kernelrelease Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
1007# clean - Delete most, but leave enough to build external modules
1008#
1009clean: rm-dirs := $(CLEAN_DIRS)
1010clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001011clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012
1013.PHONY: $(clean-dirs) clean archclean
1014$(clean-dirs):
1015 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1016
1017clean: archclean $(clean-dirs)
1018 $(call cmd,rmdirs)
1019 $(call cmd,rmfiles)
1020 @find . $(RCS_FIND_IGNORE) \
1021 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1022 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1023 -type f -print | xargs rm -f
1024
1025# mrproper - Delete all generated files, including .config
1026#
1027mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1028mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1029mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1030
1031.PHONY: $(mrproper-dirs) mrproper archmrproper
1032$(mrproper-dirs):
1033 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1034
1035mrproper: clean archmrproper $(mrproper-dirs)
1036 $(call cmd,rmdirs)
1037 $(call cmd,rmfiles)
1038
1039# distclean
1040#
1041.PHONY: distclean
1042
1043distclean: mrproper
1044 @find $(srctree) $(RCS_FIND_IGNORE) \
1045 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1046 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1047 -o -name '.*.rej' -o -size 0 \
1048 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1049 -type f -print | xargs rm -f
1050
1051
1052# Packaging of the kernel to various formats
1053# ---------------------------------------------------------------------------
1054# rpm target kept for backward compatibility
1055package-dir := $(srctree)/scripts/package
1056
1057.PHONY: %-pkg rpm
1058
1059%pkg: FORCE
1060 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1061rpm: FORCE
1062 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1063
1064
1065# Brief documentation of the typical targets used
1066# ---------------------------------------------------------------------------
1067
1068boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1069boards := $(notdir $(boards))
1070
1071help:
1072 @echo 'Cleaning targets:'
1073 @echo ' clean - remove most generated files but keep the config'
1074 @echo ' mrproper - remove all generated files + config + various backup files'
1075 @echo ''
1076 @echo 'Configuration targets:'
1077 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1078 @echo ''
1079 @echo 'Other generic targets:'
1080 @echo ' all - Build all targets marked with [*]'
1081 @echo '* vmlinux - Build the bare kernel'
1082 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001083 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 @echo ' dir/ - Build all files in dir and below'
1085 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001086 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 @echo ' rpm - Build a kernel as an RPM package'
1088 @echo ' tags/TAGS - Generate tags file for editors'
1089 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001090 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001091 @echo ' kernelversion - Output the version stored in Makefile'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 @echo ''
1093 @echo 'Static analysers'
1094 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1095 @echo ' and init sections from non-init sections'
1096 @echo ' checkstack - Generate a list of stack hogs'
1097 @echo ' namespacecheck - Name space analysis on compiled kernel'
1098 @echo ''
1099 @echo 'Kernel packaging:'
1100 @$(MAKE) -f $(package-dir)/Makefile help
1101 @echo ''
1102 @echo 'Documentation targets:'
1103 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1104 @echo ''
1105 @echo 'Architecture specific targets ($(ARCH)):'
1106 @$(if $(archhelp),$(archhelp),\
1107 echo ' No architecture specific help defined for $(ARCH)')
1108 @echo ''
1109 @$(if $(boards), \
1110 $(foreach b, $(boards), \
1111 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1112 echo '')
1113
1114 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1115 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1116 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1117 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1118 @echo ''
1119 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1120 @echo 'For further info see the ./README file'
1121
1122
1123# Documentation targets
1124# ---------------------------------------------------------------------------
1125%docs: scripts_basic FORCE
1126 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1127
1128else # KBUILD_EXTMOD
1129
1130###
1131# External module support.
1132# When building external modules the kernel used as basis is considered
1133# read-only, and no consistency checks are made and the make
1134# system is not used on the basis kernel. If updates are required
1135# in the basis kernel ordinary make commands (without M=...) must
1136# be used.
1137#
1138# The following are the only valid targets when building external
1139# modules.
1140# make M=dir clean Delete all automatically generated files
1141# make M=dir modules Make all modules in specified dir
1142# make M=dir Same as 'make M=dir modules'
1143# make M=dir modules_install
1144# Install the modules build in the module directory
1145# Assumes install directory is already created
1146
1147# We are always building modules
1148KBUILD_MODULES := 1
1149.PHONY: crmodverdir
1150crmodverdir:
1151 $(Q)mkdir -p $(MODVERDIR)
1152
1153.PHONY: $(objtree)/Module.symvers
1154$(objtree)/Module.symvers:
1155 @test -e $(objtree)/Module.symvers || ( \
1156 echo; \
1157 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1158 echo " is missing; modules will have no dependencies and modversions."; \
1159 echo )
1160
1161module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1162.PHONY: $(module-dirs) modules
1163$(module-dirs): crmodverdir $(objtree)/Module.symvers
1164 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1165
1166modules: $(module-dirs)
1167 @echo ' Building modules, stage 2.';
1168 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1169
1170.PHONY: modules_install
1171modules_install:
1172 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1173
1174clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1175
1176.PHONY: $(clean-dirs) clean
1177$(clean-dirs):
1178 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1179
1180clean: rm-dirs := $(MODVERDIR)
1181clean: $(clean-dirs)
1182 $(call cmd,rmdirs)
1183 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1184 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1185 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1186 -type f -print | xargs rm -f
1187
1188help:
1189 @echo ' Building external modules.'
1190 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1191 @echo ''
1192 @echo ' modules - default target, build the module(s)'
1193 @echo ' modules_install - install the module'
1194 @echo ' clean - remove generated files in module directory only'
1195 @echo ''
1196endif # KBUILD_EXTMOD
1197
1198# Generate tags for editors
1199# ---------------------------------------------------------------------------
1200
1201#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1202#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1203#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1204
George Anzingerf182ae62005-07-07 17:56:06 -07001205ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206__srctree =
1207else
1208__srctree = $(srctree)/
1209endif
1210
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001211ifeq ($(ALLSOURCE_ARCHS),)
1212ifeq ($(ARCH),um)
1213ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1214else
1215ALLINCLUDE_ARCHS := $(ARCH)
1216endif
1217else
1218#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1219ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1220endif
1221
Ian Campbella0674e82005-06-23 11:25:54 +01001222ALLSOURCE_ARCHS := $(ARCH)
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224define all-sources
1225 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1226 \( -name include -o -name arch \) -prune -o \
1227 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001228 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1229 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1230 -name '*.[chS]' -print; \
1231 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1233 -name '*.[chS]' -print; \
1234 find $(__srctree)include $(RCS_FIND_IGNORE) \
1235 \( -name config -o -name 'asm-*' \) -prune \
1236 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001237 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001238 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1239 -name '*.[chS]' -print; \
1240 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1242 -name '*.[chS]' -print )
1243endef
1244
1245quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001246 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
1248quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001249 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
1251cscope: FORCE
1252 $(call cmd,cscope-file)
1253 $(call cmd,cscope)
1254
1255quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001256define cmd_TAGS
1257 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001258 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1259 echo "-I __initdata,__exitdata,__acquires,__releases \
1260 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1261 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001262 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001263endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001265TAGS: FORCE
1266 $(call cmd,TAGS)
1267
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269quiet_cmd_tags = MAKE $@
1270define cmd_tags
1271 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001272 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1273 echo "-I __initdata,__exitdata,__acquires,__releases \
1274 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1275 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001276 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277endef
1278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279tags: FORCE
1280 $(call cmd,tags)
1281
1282
1283# Scripts to check various things for consistency
1284# ---------------------------------------------------------------------------
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286includecheck:
1287 find * $(RCS_FIND_IGNORE) \
1288 -name '*.[hcS]' -type f -print | sort \
1289 | xargs $(PERL) -w scripts/checkincludes.pl
1290
1291versioncheck:
1292 find * $(RCS_FIND_IGNORE) \
1293 -name '*.[hcS]' -type f -print | sort \
1294 | xargs $(PERL) -w scripts/checkversion.pl
1295
1296buildcheck:
1297 $(PERL) $(srctree)/scripts/reference_discarded.pl
1298 $(PERL) $(srctree)/scripts/reference_init.pl
1299
1300namespacecheck:
1301 $(PERL) $(srctree)/scripts/namespace.pl
1302
1303endif #ifeq ($(config-targets),1)
1304endif #ifeq ($(mixed-targets),1)
1305
1306.PHONY: checkstack
1307checkstack:
1308 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1309 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1310
1311kernelrelease:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001312 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1313 $(error kernelrelease not valid - run 'make *config' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001314kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001315 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
1317# FIXME Should go into a make.lib or something
1318# ===========================================================================
1319
1320quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1321 cmd_rmdirs = rm -rf $(rm-dirs)
1322
1323quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1324 cmd_rmfiles = rm -f $(rm-files)
1325
1326
1327a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1328 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1329 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1330
1331quiet_cmd_as_o_S = AS $@
1332cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1333
1334# read all saved command lines
1335
1336targets := $(wildcard $(sort $(targets)))
1337cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1338
1339ifneq ($(cmd_files),)
1340 $(cmd_files): ; # Do not try to update included dependency files
1341 include $(cmd_files)
1342endif
1343
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1345# Usage:
1346# $(Q)$(MAKE) $(clean)=dir
1347clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349endif # skip-makefile
1350
1351FORCE: