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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds6246b612006-04-02 20:22:10 -07003SUBLEVEL = 17
Linus Torvalds1def6302006-06-05 17:57:02 -07004EXTRAVERSION =-rc6
5NAME=Crazed Snow-Weasel
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 := $(O)
94 endif
95endif
96
97# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -050098PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -070099_all:
100
101ifneq ($(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
Paul Smith4f193362006-03-05 17:14:10 -0500109PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800111$(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) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800114 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
Paul Smith4f193362006-03-05 17:14:10 -0500126PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127ifeq ($(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
Mattia Dongili0f558c32006-02-19 13:50:37 +0100140VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142export srctree objtree VPATH TOPDIR
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145# SUBARCH tells the usermode build what the underlying arch is. That is set
146# first, and if a usermode build is happening, the "ARCH=um" on the command
147# line overrides the setting of ARCH below. If a native build is happening,
148# then ARCH is assigned, getting whatever value it gets normally, and
149# SUBARCH is subsequently ignored.
150
151SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
152 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800153 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000154 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156# Cross compiling and selecting different set of gcc/bin-utils
157# ---------------------------------------------------------------------------
158#
159# When performing cross compilation for other architectures ARCH shall be set
160# to the target architecture. (See arch/* for the possibilities).
161# ARCH can be set during invocation of make:
162# make ARCH=ia64
163# Another way is to have ARCH set in the environment.
164# The default ARCH is the host where make is executed.
165
166# CROSS_COMPILE specify the prefix used for all executables used
167# during compilation. Only gcc and related bin-utils executables
168# are prefixed with $(CROSS_COMPILE).
169# CROSS_COMPILE can be set on the command line
170# make CROSS_COMPILE=ia64-linux-
171# Alternatively CROSS_COMPILE can be set in the environment.
172# Default value for CROSS_COMPILE is not to prefix executables
173# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
174
175ARCH ?= $(SUBARCH)
176CROSS_COMPILE ?=
177
178# Architecture as present in compile.h
179UTS_MACHINE := $(ARCH)
180
181# SHELL used by kbuild
182CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
183 else if [ -x /bin/bash ]; then echo /bin/bash; \
184 else echo sh; fi ; fi)
185
186HOSTCC = gcc
187HOSTCXX = g++
188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189HOSTCXXFLAGS = -O2
190
191# Decide whether to build built-in, modular, or both.
192# Normally, just do built-in.
193
194KBUILD_MODULES :=
195KBUILD_BUILTIN := 1
196
197# If we have only "make modules", don't compile built-in objects.
198# When we're building modules with modversions, we need to consider
199# the built-in objects during the descend as well, in order to
200# make sure the checksums are uptodate before we record them.
201
202ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204endif
205
206# If we have "make <whatever> modules", compile modules
207# in addition to whatever we do anyway.
208# Just "make" or "make all" shall build modules as well
209
210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
211 KBUILD_MODULES := 1
212endif
213
214ifeq ($(MAKECMDGOALS),)
215 KBUILD_MODULES := 1
216endif
217
Sam Ravnborge579d352005-07-27 08:10:10 +0200218export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
220
221# Beautify output
222# ---------------------------------------------------------------------------
223#
224# Normally, we echo the whole command before executing it. By making
225# that echo $($(quiet)$(cmd)), we now have the possibility to set
226# $(quiet) to choose other forms of output instead, e.g.
227#
228# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
229# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
230#
231# If $(quiet) is empty, the whole command will be printed.
232# If it is set to "quiet_", only the short version will be printed.
233# If it is set to "silent_", nothing wil be printed at all, since
234# the variable $(silent_cmd_cc_o_c) doesn't exist.
235#
Adrian Bunka58a4142006-01-10 00:08:17 +0100236# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# for commands that shall be hidden in non-verbose mode.
238#
239# $(Q)ln $@ :<
240#
241# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
242# If KBUILD_VERBOSE equals 1 then the above command is displayed.
243
244ifeq ($(KBUILD_VERBOSE),1)
245 quiet =
246 Q =
247else
248 quiet=quiet_
249 Q = @
250endif
251
252# If the user is running make -s (silent mode), suppress echoing of
253# commands
254
255ifneq ($(findstring s,$(MAKEFLAGS)),)
256 quiet=silent_
257endif
258
259export quiet Q KBUILD_VERBOSE
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262# Look for make include files relative to root of kernel src
263MAKEFLAGS += --include-dir=$(srctree)
264
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000265# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000266include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268# For maximum performance (+ possibly random breakage, uncomment
269# the following)
270
271#MAKEFLAGS += -rR
272
273# Make variables (CC, etc...)
274
275AS = $(CROSS_COMPILE)as
276LD = $(CROSS_COMPILE)ld
277CC = $(CROSS_COMPILE)gcc
278CPP = $(CC) -E
279AR = $(CROSS_COMPILE)ar
280NM = $(CROSS_COMPILE)nm
281STRIP = $(CROSS_COMPILE)strip
282OBJCOPY = $(CROSS_COMPILE)objcopy
283OBJDUMP = $(CROSS_COMPILE)objdump
284AWK = awk
285GENKSYMS = scripts/genksyms/genksyms
286DEPMOD = /sbin/depmod
287KALLSYMS = scripts/kallsyms
288PERL = perl
289CHECK = sparse
290
Al Viroaf4ca452005-10-21 02:55:38 -0400291CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292MODFLAGS = -DMODULE
293CFLAGS_MODULE = $(MODFLAGS)
294AFLAGS_MODULE = $(MODFLAGS)
295LDFLAGS_MODULE = -r
296CFLAGS_KERNEL =
297AFLAGS_KERNEL =
298
299
300# Use LINUXINCLUDE when you must reference the include/ directory.
301# Needed to be compatible with the O= option
302LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100303 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800304 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
307
Olaf Hering3c521e02005-07-21 21:02:09 +0200308CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Andi Kleen6edfba12006-03-25 16:29:49 +0100309 -fno-strict-aliasing -fno-common
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310AFLAGS := -D__ASSEMBLY__
311
Sam Ravnborgcb584552006-01-09 21:20:34 +0100312# Read KERNELRELEASE from .kernelrelease (if it exists)
313KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100314KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100315
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100316export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
318 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
319 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
320
321export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
322export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
323export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
324
325# When compiling out-of-tree modules, put MODVERDIR in the module
326# tree rather than in the kernel tree. The kernel tree might
327# even be read-only.
328export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330# Files to ignore in find ... statements
331
Trond Myklebust406119f2005-10-27 14:46:53 -0400332RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
333export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335# ===========================================================================
336# Rules shared between *config targets and build targets
337
338# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500339PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340scripts_basic:
341 $(Q)$(MAKE) $(build)=scripts/basic
342
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200343# To avoid any implicit rule to kick in, define an empty command.
344scripts/basic/%: scripts_basic ;
345
Paul Smith4f193362006-03-05 17:14:10 -0500346PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200347# outputmakefile generates a Makefile in the output directory, if using a
348# separate output directory. This allows convenient use of make in the
349# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200351ifneq ($(KBUILD_SRC),)
352 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
353 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
354endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356# To make sure we do not include .config for any of the *config targets
357# catch them early, and hand them over to scripts/kconfig/Makefile
358# It is allowed to specify more targets when calling make, including
359# mixing *config targets and build targets.
360# For example 'make oldconfig all'.
361# Detect when mixed targets is specified, and make a second invocation
362# of make so .config is not included in this case either (for *config).
363
364no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800365 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367config-targets := 0
368mixed-targets := 0
369dot-config := 1
370
371ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
372 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
373 dot-config := 0
374 endif
375endif
376
377ifeq ($(KBUILD_EXTMOD),)
378 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
379 config-targets := 1
380 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
381 mixed-targets := 1
382 endif
383 endif
384endif
385
386ifeq ($(mixed-targets),1)
387# ===========================================================================
388# We're called with mixed targets (*config and build targets).
389# Handle them one by one.
390
391%:: FORCE
392 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
393
394else
395ifeq ($(config-targets),1)
396# ===========================================================================
397# *config targets only - make sure prerequisites are updated, and descend
398# in scripts/kconfig to make the *config target
399
400# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
401# KBUILD_DEFCONFIG may point out an alternative default configuration
402# used for 'make defconfig'
403include $(srctree)/arch/$(ARCH)/Makefile
404export KBUILD_DEFCONFIG
405
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200406config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700407 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 $(Q)$(MAKE) $(build)=scripts/kconfig $@
Sam Ravnborg8c7f75d2006-01-21 12:07:56 +0100409 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
411else
412# ===========================================================================
413# Build targets only - this includes vmlinux, arch specific targets, clean
414# targets and others. In general all targets except *config targets.
415
416ifeq ($(KBUILD_EXTMOD),)
417# Additional helpers built in scripts/
418# Carefully list dependencies so we do not try to build scripts twice
419# in parrallel
Paul Smith4f193362006-03-05 17:14:10 -0500420PHONY += scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421scripts: scripts_basic include/config/MARKER
422 $(Q)$(MAKE) $(build)=$(@)
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424# Objects we will link into vmlinux / subdirs we need to visit
425init-y := init/
426drivers-y := drivers/ sound/
427net-y := net/
428libs-y := lib/
429core-y := usr/
430endif # KBUILD_EXTMOD
431
432ifeq ($(dot-config),1)
433# In this section, we need .config
434
435# Read in dependencies to all Kconfig* files, make sure to run
436# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700437-include include/config/auto.conf.cmd
438-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440# To avoid any implicit rule to kick in, define an empty command
Roman Zippelc955cca2006-06-08 22:12:39 -0700441.config include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Roman Zippelc955cca2006-06-08 22:12:39 -0700443# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100444# with it and forgot to run make oldconfig.
Roman Zippelc955cca2006-06-08 22:12:39 -0700445# if auto.conf.cmd is missing then we are probarly in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100446# we execute the config step to be sure to catch updated Kconfig files
Roman Zippelc955cca2006-06-08 22:12:39 -0700447include/config/auto.conf: .config include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
Roman Zippelc955cca2006-06-08 22:12:39 -0700449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450else
451# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700452include/config/auto.conf: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453endif
454
455# The all: target is the default when no target is given on the
456# command line.
457# This allow a user to issue only 'make' to build a kernel including modules
458# Defaults vmlinux but it is usually overriden in the arch makefile
459all: vmlinux
460
461ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
462CFLAGS += -Os
463else
464CFLAGS += -O2
465endif
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700468CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469else
470CFLAGS += -fomit-frame-pointer
471endif
472
Jan Beulich604bf5a2006-03-24 03:16:19 -0800473ifdef CONFIG_UNWIND_INFO
474CFLAGS += -fasynchronous-unwind-tables
475endif
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477ifdef CONFIG_DEBUG_INFO
478CFLAGS += -g
479endif
480
481include $(srctree)/arch/$(ARCH)/Makefile
482
Sam Ravnborge8e69932005-04-30 16:51:42 -0700483# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700484NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700485CHECKFLAGS += $(NOSTDINC_FLAGS)
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487# warn about C99 declaration after statement
488CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
489
490# disable pointer signedness warnings in gcc 4.0
491CFLAGS += $(call cc-option,-Wno-pointer-sign,)
492
493# Default kernel image to build when no specific target is given.
494# KBUILD_IMAGE may be overruled on the commandline or
495# set in the environment
496# Also any assignments in arch/$(ARCH)/Makefile take precedence over
497# this default value
498export KBUILD_IMAGE ?= vmlinux
499
500#
501# INSTALL_PATH specifies where to place the updated kernel and system map
502# images. Default is /boot, but you can set it to other values
503export INSTALL_PATH ?= /boot
504
505#
506# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
507# relocations required by build roots. This is not defined in the
508# makefile but the arguement can be passed to make if needed.
509#
510
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100511MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512export MODLIB
513
514
515ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100516core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
519 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
520 $(net-y) $(net-m) $(libs-y) $(libs-m)))
521
522vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
523 $(init-n) $(init-) \
524 $(core-n) $(core-) $(drivers-n) $(drivers-) \
525 $(net-n) $(net-) $(libs-n) $(libs-))))
526
527init-y := $(patsubst %/, %/built-in.o, $(init-y))
528core-y := $(patsubst %/, %/built-in.o, $(core-y))
529drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
530net-y := $(patsubst %/, %/built-in.o, $(net-y))
531libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
532libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
533libs-y := $(libs-y1) $(libs-y2)
534
535# Build vmlinux
536# ---------------------------------------------------------------------------
537# vmlinux is build from the objects selected by $(vmlinux-init) and
538# $(vmlinux-main). Most are built-in.o files from top-level directories
539# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
540# Ordering when linking is important, and $(vmlinux-init) must be first.
541#
542# vmlinux
543# ^
544# |
545# +-< $(vmlinux-init)
546# | +--< init/version.o + more
547# |
548# +--< $(vmlinux-main)
549# | +--< driver/built-in.o mm/built-in.o + more
550# |
551# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
552#
553# vmlinux version (uname -v) cannot be updated during normal
554# descending-into-subdirs phase since we do not yet know if we need to
555# update vmlinux.
556# Therefore this step is delayed until just before final link of vmlinux -
557# except in the kallsyms case where it is done just before adding the
558# symbols to the kernel.
559#
560# System.map is generated to document addresses of all kernel symbols
561
562vmlinux-init := $(head-y) $(init-y)
563vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
564vmlinux-all := $(vmlinux-init) $(vmlinux-main)
565vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
566
567# Rule to link vmlinux - also used during CONFIG_KALLSYMS
568# May be overridden by arch/$(ARCH)/Makefile
569quiet_cmd_vmlinux__ ?= LD $@
570 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
571 -T $(vmlinux-lds) $(vmlinux-init) \
572 --start-group $(vmlinux-main) --end-group \
573 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
574
575# Generate new vmlinux version
576quiet_cmd_vmlinux_version = GEN .version
577 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200578 if [ ! -r .version ]; then \
579 rm -f .version; \
580 echo 1 >.version; \
581 else \
582 mv .version .old_version; \
583 expr 0$$(cat .old_version) + 1 >.version; \
584 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 $(MAKE) $(build)=init
586
587# Generate System.map
588quiet_cmd_sysmap = SYSMAP
589 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
590
591# Link of vmlinux
592# If CONFIG_KALLSYMS is set .version is already updated
593# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700594# Use + in front of the vmlinux_version rule to silent warning with make -j2
595# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700597 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
599
600 $(call cmd,vmlinux__)
601 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
602
603 $(Q)$(if $($(quiet)cmd_sysmap), \
604 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
605 $(cmd_sysmap) $@ System.map; \
606 if [ $$? -ne 0 ]; then \
607 rm -f $@; \
608 /bin/false; \
609 fi;
610 $(verify_kallsyms)
611endef
612
613
614ifdef CONFIG_KALLSYMS
615# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
616# It's a three stage process:
617# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
618# empty
619# Running kallsyms on that gives us .tmp_kallsyms1.o with
620# the right size - vmlinux version (uname -v) is updated during this step
621# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
622# but due to the added section, some addresses have shifted.
623# From here, we generate a correct .tmp_kallsyms2.o
624# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
625# o Verify that the System.map from vmlinux matches the map from
626# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
627# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
628# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
629# temporary bypass to allow the kernel to be built while the
630# maintainers work out what went wrong with kallsyms.
631
632ifdef CONFIG_KALLSYMS_EXTRA_PASS
633last_kallsyms := 3
634else
635last_kallsyms := 2
636endif
637
638kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
639
640define verify_kallsyms
641 $(Q)$(if $($(quiet)cmd_sysmap), \
642 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
643 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
644 $(Q)cmp -s System.map .tmp_System.map || \
645 (echo Inconsistent kallsyms data; \
646 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
647 rm .tmp_kallsyms* ; /bin/false )
648endef
649
650# Update vmlinux version before link
651# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200652# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653cmd_ksym_ld = $(cmd_vmlinux__)
654define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200655 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 +$(call cmd,vmlinux_version)
657 $(call cmd,vmlinux__)
658 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
659endef
660
661# Generate .S file with all kernel symbols
662quiet_cmd_kallsyms = KSYM $@
663 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
664 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
665
666.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
667 $(call if_changed_dep,as_o_S)
668
669.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
670 $(call cmd,kallsyms)
671
672# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
673.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
674 $(call if_changed_rule,ksym_ld)
675
676.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
677 $(call if_changed,vmlinux__)
678
679.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
680 $(call if_changed,vmlinux__)
681
682# Needs to visit scripts/ before $(KALLSYMS) can be used.
683$(KALLSYMS): scripts ;
684
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000685# Generate some data for debugging strange kallsyms problems
686debug_kallsyms: .tmp_map$(last_kallsyms)
687
688.tmp_map%: .tmp_vmlinux% FORCE
689 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
690
691.tmp_map3: .tmp_map2
692
693.tmp_map2: .tmp_map1
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695endif # ifdef CONFIG_KALLSYMS
696
697# vmlinux image - including updated kernel symbols
698vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
699 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200700 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702# The actual objects are generated when descending,
703# make sure no implicit rule kicks in
704$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
705
706# Handle descending into subdirectories listed in $(vmlinux-dirs)
707# Preset locale variables to speed up the build process. Limit locale
708# tweaks to this spot to avoid wrong language settings when running
709# make menuconfig etc.
710# Error messages still appears in the original language
711
Paul Smith4f193362006-03-05 17:14:10 -0500712PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200713$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 $(Q)$(MAKE) $(build)=$@
715
Sam Ravnborgcb584552006-01-09 21:20:34 +0100716# Build the kernel release string
717# The KERNELRELEASE is stored in a file named .kernelrelease
718# to be used when executing for example make install or make modules_install
719#
720# Take the contents of any files called localversion* and the config
721# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
722# LOCALVERSION from the command line override all of this
723
724nullstring :=
725space := $(nullstring) # end of line
726
727___localver = $(objtree)/localversion* $(srctree)/localversion*
728__localver = $(sort $(wildcard $(___localver)))
729# skip backup files (containing '~')
730_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
731
732localver = $(subst $(space),, \
733 $(shell cat /dev/null $(_localver)) \
734 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
735
736# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
737# and if the SCM is know a tag from the SCM is appended.
738# The appended tag is determinded by the SCM used.
739#
740# Currently, only git is supported.
741# Other SCMs can edit scripts/setlocalversion and add the appropriate
742# checks as needed.
743ifdef CONFIG_LOCALVERSION_AUTO
744 _localver-auto = $(shell $(CONFIG_SHELL) \
745 $(srctree)/scripts/setlocalversion $(srctree))
746 localver-auto = $(LOCALVERSION)$(_localver-auto)
747endif
748
749localver-full = $(localver)$(localver-auto)
750
751# Store (new) KERNELRELASE string in .kernelrelease
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100752kernelrelease = $(KERNELVERSION)$(localver-full)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100753.kernelrelease: FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100754 $(Q)rm -f $@
755 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100756
757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200759# or the modules are listed in "prepare".
760# A multi level approach is used. prepareN is processed before prepareN-1.
761# archprepare is used in arch Makefiles and when processed asm symlink,
762# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200764# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500765PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200766
767# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500768PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200770# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771# and if so do:
772# 1) Check that make has not been executed in the kernel src $(srctree)
773# 2) Create the include2 directory, used for the second asm symlink
Sam Ravnborgcb584552006-01-09 21:20:34 +0100774prepare3: .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775ifneq ($(KBUILD_SRC),)
776 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700777 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 echo " $(srctree) is not clean, please run 'make mrproper'";\
779 echo " in the '$(srctree)' directory.";\
780 /bin/false; \
781 fi;
782 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
783 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
784endif
785
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200786# prepare2 creates a makefile if using a separate output directory
787prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200789prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000790 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400793 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794endif
795
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200796archprepare: prepare1 scripts_basic
797
798prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200799 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200802prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
804# Leave this as default for preprocessing vmlinux.lds.S, which is now
805# done in arch/$(ARCH)/kernel/Makefile
806
807export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809# FIXME: The asm symlink changes when $(ARCH) changes. That's
810# hard to detect, but I suppose "make mrproper" is a good idea
811# before switching between archs anyway.
812
813include/asm:
814 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
815 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
816 @ln -fsn asm-$(ARCH) $@
817
818# Split autoconf.h into include/linux/config/*
819
Roman Zippelc955cca2006-06-08 22:12:39 -0700820include/config/MARKER: scripts/basic/split-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
822 @scripts/basic/split-include include/linux/autoconf.h include/config
823 @touch $@
824
825# Generate some files
826# ---------------------------------------------------------------------------
827
828# KERNELRELEASE can change from a few different places, meaning version.h
829# needs to be updated, so this check is forced on all builds
830
831uts_len := 64
832
833define filechk_version.h
834 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
835 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
836 exit 1; \
837 fi; \
838 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
839 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
840 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
841 )
842endef
843
Jan Beulich44f329a2006-02-22 13:29:04 +0100844include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 $(call filechk,version.h)
846
847# ---------------------------------------------------------------------------
848
Paul Smith4f193362006-03-05 17:14:10 -0500849PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850depend dep:
851 @echo '*** Warning: make $@ is unnecessary now.'
852
853# ---------------------------------------------------------------------------
854# Modules
855
856ifdef CONFIG_MODULES
857
858# By default, build modules as well
859
860all: modules
861
862# Build modules
863
Paul Smith4f193362006-03-05 17:14:10 -0500864PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
866 @echo ' Building modules, stage 2.';
867 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
868
869
870# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500871PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200872modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
874# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500875PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876modules_install: _modinst_ _modinst_post
877
Paul Smith4f193362006-03-05 17:14:10 -0500878PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700880 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 echo "Warning: you may need to install module-init-tools"; \
882 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
883 sleep 1; \
884 fi
885 @rm -rf $(MODLIB)/kernel
886 @rm -f $(MODLIB)/source
887 @mkdir -p $(MODLIB)/kernel
888 @ln -s $(srctree) $(MODLIB)/source
889 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
890 rm -f $(MODLIB)/build ; \
891 ln -s $(objtree) $(MODLIB)/build ; \
892 fi
893 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
894
895# If System.map exists, run depmod. This deliberately does not have a
896# dependency on System.map since that would run the dependency tree on
897# vmlinux. This depmod is only for convenience to give the initial
898# boot a modules.dep even before / is mounted read-write. However the
899# boot script depmod is the master version.
900ifeq "$(strip $(INSTALL_MOD_PATH))" ""
901depmod_opts :=
902else
903depmod_opts := -b $(INSTALL_MOD_PATH) -r
904endif
Paul Smith4f193362006-03-05 17:14:10 -0500905PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906_modinst_post: _modinst_
907 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
908
909else # CONFIG_MODULES
910
911# Modules not configured
912# ---------------------------------------------------------------------------
913
914modules modules_install: FORCE
915 @echo
916 @echo "The present kernel configuration has modules disabled."
917 @echo "Type 'make config' and enable loadable module support."
918 @echo "Then build a kernel with module support enabled."
919 @echo
920 @exit 1
921
922endif # CONFIG_MODULES
923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924###
925# Cleaning is done on three levels.
926# make clean Delete most generated files
927# Leave enough to build external modules
928# make mrproper Delete the current configuration, and all generated files
929# make distclean Remove editor backup files, patch leftover files and the like
930
931# Directories & files removed with 'make clean'
932CLEAN_DIRS += $(MODVERDIR)
933CLEAN_FILES += vmlinux System.map \
934 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
935
936# Directories & files removed with 'make mrproper'
937MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +0100938MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 include/linux/autoconf.h include/linux/version.h \
Sam Ravnborgcb584552006-01-09 21:20:34 +0100940 .kernelrelease Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
942# clean - Delete most, but leave enough to build external modules
943#
944clean: rm-dirs := $(CLEAN_DIRS)
945clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200946clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Paul Smith4f193362006-03-05 17:14:10 -0500948PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949$(clean-dirs):
950 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
951
952clean: archclean $(clean-dirs)
953 $(call cmd,rmdirs)
954 $(call cmd,rmfiles)
955 @find . $(RCS_FIND_IGNORE) \
956 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
957 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
958 -type f -print | xargs rm -f
959
960# mrproper - Delete all generated files, including .config
961#
962mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
963mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
964mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
965
Paul Smith4f193362006-03-05 17:14:10 -0500966PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967$(mrproper-dirs):
968 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
969
970mrproper: clean archmrproper $(mrproper-dirs)
971 $(call cmd,rmdirs)
972 $(call cmd,rmfiles)
973
974# distclean
975#
Paul Smith4f193362006-03-05 17:14:10 -0500976PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
978distclean: mrproper
979 @find $(srctree) $(RCS_FIND_IGNORE) \
980 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
981 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
982 -o -name '.*.rej' -o -size 0 \
983 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
984 -type f -print | xargs rm -f
985
986
987# Packaging of the kernel to various formats
988# ---------------------------------------------------------------------------
989# rpm target kept for backward compatibility
990package-dir := $(srctree)/scripts/package
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992%pkg: FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +0100993 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994rpm: FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +0100995 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
997
998# Brief documentation of the typical targets used
999# ---------------------------------------------------------------------------
1000
1001boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1002boards := $(notdir $(boards))
1003
1004help:
1005 @echo 'Cleaning targets:'
1006 @echo ' clean - remove most generated files but keep the config'
1007 @echo ' mrproper - remove all generated files + config + various backup files'
1008 @echo ''
1009 @echo 'Configuration targets:'
1010 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1011 @echo ''
1012 @echo 'Other generic targets:'
1013 @echo ' all - Build all targets marked with [*]'
1014 @echo '* vmlinux - Build the bare kernel'
1015 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001016 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 @echo ' dir/ - Build all files in dir and below'
1018 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001019 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 @echo ' rpm - Build a kernel as an RPM package'
1021 @echo ' tags/TAGS - Generate tags file for editors'
1022 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001023 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001024 @echo ' kernelversion - Output the version stored in Makefile'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 @echo ''
1026 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 @echo ' checkstack - Generate a list of stack hogs'
1028 @echo ' namespacecheck - Name space analysis on compiled kernel'
1029 @echo ''
1030 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001031 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 @echo ''
1033 @echo 'Documentation targets:'
1034 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1035 @echo ''
1036 @echo 'Architecture specific targets ($(ARCH)):'
1037 @$(if $(archhelp),$(archhelp),\
1038 echo ' No architecture specific help defined for $(ARCH)')
1039 @echo ''
1040 @$(if $(boards), \
1041 $(foreach b, $(boards), \
1042 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1043 echo '')
1044
1045 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1046 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1047 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1048 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1049 @echo ''
1050 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1051 @echo 'For further info see the ./README file'
1052
1053
1054# Documentation targets
1055# ---------------------------------------------------------------------------
1056%docs: scripts_basic FORCE
1057 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1058
1059else # KBUILD_EXTMOD
1060
1061###
1062# External module support.
1063# When building external modules the kernel used as basis is considered
1064# read-only, and no consistency checks are made and the make
1065# system is not used on the basis kernel. If updates are required
1066# in the basis kernel ordinary make commands (without M=...) must
1067# be used.
1068#
1069# The following are the only valid targets when building external
1070# modules.
1071# make M=dir clean Delete all automatically generated files
1072# make M=dir modules Make all modules in specified dir
1073# make M=dir Same as 'make M=dir modules'
1074# make M=dir modules_install
1075# Install the modules build in the module directory
1076# Assumes install directory is already created
1077
1078# We are always building modules
1079KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001080PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081crmodverdir:
1082 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001083 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Paul Smith4f193362006-03-05 17:14:10 -05001085PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086$(objtree)/Module.symvers:
1087 @test -e $(objtree)/Module.symvers || ( \
1088 echo; \
1089 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1090 echo " is missing; modules will have no dependencies and modversions."; \
1091 echo )
1092
1093module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001094PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095$(module-dirs): crmodverdir $(objtree)/Module.symvers
1096 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1097
1098modules: $(module-dirs)
1099 @echo ' Building modules, stage 2.';
1100 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1101
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001103modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001104
Paul Smith4f193362006-03-05 17:14:10 -05001105install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1106PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001107_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001108 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1110
Sam Ravnborga67dc212006-01-28 23:51:57 +01001111# Run depmod only is we have System.map and depmod is executable
1112quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1113 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1114 $(DEPMOD) -ae -F System.map \
1115 $(if $(strip $(INSTALL_MOD_PATH)), \
1116 -b $(INSTALL_MOD_PATH) -r) \
1117 $(KERNELRELEASE); \
1118 fi
1119
Paul Smith4f193362006-03-05 17:14:10 -05001120PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001121_emodinst_post: _emodinst_
1122 $(call cmd,depmod)
1123
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1125
Paul Smith4f193362006-03-05 17:14:10 -05001126PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127$(clean-dirs):
1128 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1129
1130clean: rm-dirs := $(MODVERDIR)
1131clean: $(clean-dirs)
1132 $(call cmd,rmdirs)
1133 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1134 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1135 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1136 -type f -print | xargs rm -f
1137
1138help:
1139 @echo ' Building external modules.'
1140 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1141 @echo ''
1142 @echo ' modules - default target, build the module(s)'
1143 @echo ' modules_install - install the module'
1144 @echo ' clean - remove generated files in module directory only'
1145 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001146
1147# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001148PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001149prepare: ;
1150scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151endif # KBUILD_EXTMOD
1152
1153# Generate tags for editors
1154# ---------------------------------------------------------------------------
1155
1156#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1157#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1158#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1159
George Anzingerf182ae62005-07-07 17:56:06 -07001160ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161__srctree =
1162else
1163__srctree = $(srctree)/
1164endif
1165
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001166ifeq ($(ALLSOURCE_ARCHS),)
1167ifeq ($(ARCH),um)
1168ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1169else
1170ALLINCLUDE_ARCHS := $(ARCH)
1171endif
1172else
1173#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1174ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1175endif
1176
Ian Campbella0674e82005-06-23 11:25:54 +01001177ALLSOURCE_ARCHS := $(ARCH)
1178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179define all-sources
1180 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1181 \( -name include -o -name arch \) -prune -o \
1182 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001183 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1184 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1185 -name '*.[chS]' -print; \
1186 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1188 -name '*.[chS]' -print; \
1189 find $(__srctree)include $(RCS_FIND_IGNORE) \
1190 \( -name config -o -name 'asm-*' \) -prune \
1191 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001192 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001193 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1194 -name '*.[chS]' -print; \
1195 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1197 -name '*.[chS]' -print )
1198endef
1199
1200quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001201 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
1203quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001204 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
1206cscope: FORCE
1207 $(call cmd,cscope-file)
1208 $(call cmd,cscope)
1209
1210quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001211define cmd_TAGS
1212 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001213 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1214 echo "-I __initdata,__exitdata,__acquires,__releases \
1215 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1216 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001217 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001218endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001220TAGS: FORCE
1221 $(call cmd,TAGS)
1222
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224quiet_cmd_tags = MAKE $@
1225define cmd_tags
1226 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001227 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1228 echo "-I __initdata,__exitdata,__acquires,__releases \
1229 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1230 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001231 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232endef
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234tags: FORCE
1235 $(call cmd,tags)
1236
1237
1238# Scripts to check various things for consistency
1239# ---------------------------------------------------------------------------
1240
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241includecheck:
1242 find * $(RCS_FIND_IGNORE) \
1243 -name '*.[hcS]' -type f -print | sort \
1244 | xargs $(PERL) -w scripts/checkincludes.pl
1245
1246versioncheck:
1247 find * $(RCS_FIND_IGNORE) \
1248 -name '*.[hcS]' -type f -print | sort \
1249 | xargs $(PERL) -w scripts/checkversion.pl
1250
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251namespacecheck:
1252 $(PERL) $(srctree)/scripts/namespace.pl
1253
1254endif #ifeq ($(config-targets),1)
1255endif #ifeq ($(mixed-targets),1)
1256
Paul Smith4f193362006-03-05 17:14:10 -05001257PHONY += checkstack
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258checkstack:
1259 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1260 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1261
1262kernelrelease:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001263 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1264 $(error kernelrelease not valid - run 'make *config' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001265kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001266 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Sam Ravnborg06300b22006-01-25 07:13:18 +01001268# Single targets
1269# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001270# Single targets are compatible with:
1271# - build whith mixed source and output
1272# - build with separate output dir 'make O=...'
1273# - external modules
1274#
1275# target-dir => where to store outputfile
1276# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001277
Sam Ravnborg06300b22006-01-25 07:13:18 +01001278ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001279 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001280 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001281else
1282 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001283 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1284 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001285endif
1286
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001287%.s: %.c prepare scripts FORCE
1288 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1289%.i: %.c prepare scripts FORCE
1290 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1291%.o: %.c prepare scripts FORCE
1292 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1293%.lst: %.c prepare scripts FORCE
1294 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1295%.s: %.S prepare scripts FORCE
1296 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1297%.o: %.S prepare scripts FORCE
1298 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1299
1300# Modules
1301/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001302 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001303 $(build)=$(build-dir)
1304%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001305 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001306 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001307 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309# FIXME Should go into a make.lib or something
1310# ===========================================================================
1311
1312quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1313 cmd_rmdirs = rm -rf $(rm-dirs)
1314
1315quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1316 cmd_rmfiles = rm -f $(rm-files)
1317
1318
1319a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1320 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1321 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1322
1323quiet_cmd_as_o_S = AS $@
1324cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1325
1326# read all saved command lines
1327
1328targets := $(wildcard $(sort $(targets)))
1329cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1330
1331ifneq ($(cmd_files),)
1332 $(cmd_files): ; # Do not try to update included dependency files
1333 include $(cmd_files)
1334endif
1335
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1337# Usage:
1338# $(Q)$(MAKE) $(clean)=dir
1339clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1340
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341endif # skip-makefile
1342
Paul Smith4f193362006-03-05 17:14:10 -05001343PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001345
1346
1347# Declare the contents of the .PHONY variable as phony. We keep that
1348# information in a variable se we can use it in if_changed and friends.
1349.PHONY: $(PHONY)