projects/linux·blob v2.6.21-rc7 · refs

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1VERSION = 2
2PATCHLEVEL = 6
3SUBLEVEL = 21
4EXTRAVERSION = -rc7
5NAME = Nocturnal Monster Puppy
6
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:
14# o use make's built-in rules and variables
15# (this increases performance and avoid hard-to-debug behavour);
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
18
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
47# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
56
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
84#
85# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
108PHONY := _all
109_all:
110
111ifneq ($(KBUILD_OUTPUT),)
112# Invoke a second make in the output directory, passing relevant variables
113# check that the output directory actually exists
114saved-output := $(KBUILD_OUTPUT)
115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116$(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
118
119PHONY += $(MAKECMDGOALS)
120
121$(filter-out _all,$(MAKECMDGOALS)) _all:
122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
125
126# Leave processing to above invocation of make
127skip-makefile := 1
128endif # ifneq ($(KBUILD_OUTPUT),)
129endif # ifeq ($(KBUILD_SRC),)
130
131# We process the rest of the Makefile if this is the final invocation of make
132ifeq ($(skip-makefile),)
133
134# If building an external module we do not care about the all: rule
135# but instead _all depend on modules
136PHONY += all
137ifeq ($(KBUILD_EXTMOD),)
138_all: all
139else
140_all: modules
141endif
142
143srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
144TOPDIR := $(srctree)
145# FIXME - TOPDIR is obsolete, use srctree/objtree
146objtree := $(CURDIR)
147src := $(srctree)
148obj := $(objtree)
149
150VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
151
152export srctree objtree VPATH TOPDIR
153
154
155# SUBARCH tells the usermode build what the underlying arch is. That is set
156# first, and if a usermode build is happening, the "ARCH=um" on the command
157# line overrides the setting of ARCH below. If a native build is happening,
158# then ARCH is assigned, getting whatever value it gets normally, and
159# SUBARCH is subsequently ignored.
160
161SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
165
166# Cross compiling and selecting different set of gcc/bin-utils
167# ---------------------------------------------------------------------------
168#
169# When performing cross compilation for other architectures ARCH shall be set
170# to the target architecture. (See arch/* for the possibilities).
171# ARCH can be set during invocation of make:
172# make ARCH=ia64
173# Another way is to have ARCH set in the environment.
174# The default ARCH is the host where make is executed.
175
176# CROSS_COMPILE specify the prefix used for all executables used
177# during compilation. Only gcc and related bin-utils executables
178# are prefixed with $(CROSS_COMPILE).
179# CROSS_COMPILE can be set on the command line
180# make CROSS_COMPILE=ia64-linux-
181# Alternatively CROSS_COMPILE can be set in the environment.
182# Default value for CROSS_COMPILE is not to prefix executables
183# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
184
185ARCH ?= $(SUBARCH)
186CROSS_COMPILE ?=
187
188# Architecture as present in compile.h
189UTS_MACHINE := $(ARCH)
190
191KCONFIG_CONFIG ?= .config
192
193# SHELL used by kbuild
194CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
197
198HOSTCC = gcc
199HOSTCXX = g++
200HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
201HOSTCXXFLAGS = -O2
202
203# Decide whether to build built-in, modular, or both.
204# Normally, just do built-in.
205
206KBUILD_MODULES :=
207KBUILD_BUILTIN := 1
208
209# If we have only "make modules", don't compile built-in objects.
210# When we're building modules with modversions, we need to consider
211# the built-in objects during the descend as well, in order to
212# make sure the checksums are up to date before we record them.
213
214ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
216endif
217
218# If we have "make <whatever> modules", compile modules
219# in addition to whatever we do anyway.
220# Just "make" or "make all" shall build modules as well
221
222ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
223 KBUILD_MODULES := 1
224endif
225
226ifeq ($(MAKECMDGOALS),)
227 KBUILD_MODULES := 1
228endif
229
230export KBUILD_MODULES KBUILD_BUILTIN
231export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
232
233# Beautify output
234# ---------------------------------------------------------------------------
235#
236# Normally, we echo the whole command before executing it. By making
237# that echo $($(quiet)$(cmd)), we now have the possibility to set
238# $(quiet) to choose other forms of output instead, e.g.
239#
240# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
242#
243# If $(quiet) is empty, the whole command will be printed.
244# If it is set to "quiet_", only the short version will be printed.
245# If it is set to "silent_", nothing will be printed at all, since
246# the variable $(silent_cmd_cc_o_c) doesn't exist.
247#
248# A simple variant is to prefix commands with $(Q) - that's useful
249# for commands that shall be hidden in non-verbose mode.
250#
251# $(Q)ln $@ :<
252#
253# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254# If KBUILD_VERBOSE equals 1 then the above command is displayed.
255
256ifeq ($(KBUILD_VERBOSE),1)
257 quiet =
258 Q =
259else
260 quiet=quiet_
261 Q = @
262endif
263
264# If the user is running make -s (silent mode), suppress echoing of
265# commands
266
267ifneq ($(findstring s,$(MAKEFLAGS)),)
268 quiet=silent_
269endif
270
271export quiet Q KBUILD_VERBOSE
272
273
274# Look for make include files relative to root of kernel src
275MAKEFLAGS += --include-dir=$(srctree)
276
277# We need some generic definitions.
278include $(srctree)/scripts/Kbuild.include
279
280# Make variables (CC, etc...)
281
282AS = $(CROSS_COMPILE)as
283LD = $(CROSS_COMPILE)ld
284CC = $(CROSS_COMPILE)gcc
285CPP = $(CC) -E
286AR = $(CROSS_COMPILE)ar
287NM = $(CROSS_COMPILE)nm
288STRIP = $(CROSS_COMPILE)strip
289OBJCOPY = $(CROSS_COMPILE)objcopy
290OBJDUMP = $(CROSS_COMPILE)objdump
291AWK = awk
292GENKSYMS = scripts/genksyms/genksyms
293DEPMOD = /sbin/depmod
294KALLSYMS = scripts/kallsyms
295PERL = perl
296CHECK = sparse
297
298CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
299MODFLAGS = -DMODULE
300CFLAGS_MODULE = $(MODFLAGS)
301AFLAGS_MODULE = $(MODFLAGS)
302LDFLAGS_MODULE = -r
303CFLAGS_KERNEL =
304AFLAGS_KERNEL =
305
306
307# Use LINUXINCLUDE when you must reference the include/ directory.
308# Needed to be compatible with the O= option
309LINUXINCLUDE := -Iinclude \
310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
311 -include include/linux/autoconf.h
312
313CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
314
315CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common
317AFLAGS := -D__ASSEMBLY__
318
319# Read KERNELRELEASE from include/config/kernel.release (if it exists)
320KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
321KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
322
323export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
324export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
325export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
326export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
327
328export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
329export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
330export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
331
332# When compiling out-of-tree modules, put MODVERDIR in the module
333# tree rather than in the kernel tree. The kernel tree might
334# even be read-only.
335export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
336
337# Files to ignore in find ... statements
338
339RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
340export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
341
342# ===========================================================================
343# Rules shared between *config targets and build targets
344
345# Basic helpers built in scripts/
346PHONY += scripts_basic
347scripts_basic:
348 $(Q)$(MAKE) $(build)=scripts/basic
349
350# To avoid any implicit rule to kick in, define an empty command.
351scripts/basic/%: scripts_basic ;
352
353PHONY += outputmakefile
354# outputmakefile generates a Makefile in the output directory, if using a
355# separate output directory. This allows convenient use of make in the
356# output directory.
357outputmakefile:
358ifneq ($(KBUILD_SRC),)
359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
360 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
361endif
362
363# To make sure we do not include .config for any of the *config targets
364# catch them early, and hand them over to scripts/kconfig/Makefile
365# It is allowed to specify more targets when calling make, including
366# mixing *config targets and build targets.
367# For example 'make oldconfig all'.
368# Detect when mixed targets is specified, and make a second invocation
369# of make so .config is not included in this case either (for *config).
370
371no-dot-config-targets := clean mrproper distclean \
372 cscope TAGS tags help %docs check% \
373 include/linux/version.h headers_% \
374 kernelrelease kernelversion
375
376config-targets := 0
377mixed-targets := 0
378dot-config := 1
379
380ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
381 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 dot-config := 0
383 endif
384endif
385
386ifeq ($(KBUILD_EXTMOD),)
387 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
388 config-targets := 1
389 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
390 mixed-targets := 1
391 endif
392 endif
393endif
394
395ifeq ($(mixed-targets),1)
396# ===========================================================================
397# We're called with mixed targets (*config and build targets).
398# Handle them one by one.
399
400%:: FORCE
401 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
402
403else
404ifeq ($(config-targets),1)
405# ===========================================================================
406# *config targets only - make sure prerequisites are updated, and descend
407# in scripts/kconfig to make the *config target
408
409# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
410# KBUILD_DEFCONFIG may point out an alternative default configuration
411# used for 'make defconfig'
412include $(srctree)/arch/$(ARCH)/Makefile
413export KBUILD_DEFCONFIG
414
415config %config: scripts_basic outputmakefile FORCE
416 $(Q)mkdir -p include/linux include/config
417 $(Q)$(MAKE) $(build)=scripts/kconfig $@
418
419else
420# ===========================================================================
421# Build targets only - this includes vmlinux, arch specific targets, clean
422# targets and others. In general all targets except *config targets.
423
424ifeq ($(KBUILD_EXTMOD),)
425# Additional helpers built in scripts/
426# Carefully list dependencies so we do not try to build scripts twice
427# in parallel
428PHONY += scripts
429scripts: scripts_basic include/config/auto.conf
430 $(Q)$(MAKE) $(build)=$(@)
431
432# Objects we will link into vmlinux / subdirs we need to visit
433init-y := init/
434drivers-y := drivers/ sound/
435net-y := net/
436libs-y := lib/
437core-y := usr/
438endif # KBUILD_EXTMOD
439
440ifeq ($(dot-config),1)
441# Read in config
442-include include/config/auto.conf
443
444ifeq ($(KBUILD_EXTMOD),)
445# Read in dependencies to all Kconfig* files, make sure to run
446# oldconfig if changes are detected.
447-include include/config/auto.conf.cmd
448
449# To avoid any implicit rule to kick in, define an empty command
450$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
451
452# If .config is newer than include/config/auto.conf, someone tinkered
453# with it and forgot to run make oldconfig.
454# if auto.conf.cmd is missing then we are probably in a cleaned tree so
455# we execute the config step to be sure to catch updated Kconfig files
456include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458else
459# external modules needs include/linux/autoconf.h and include/config/auto.conf
460# but do not care if they are up-to-date. Use auto.conf to trigger the test
461PHONY += include/config/auto.conf
462
463include/config/auto.conf:
464 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
465 echo; \
466 echo " ERROR: Kernel configuration is invalid."; \
467 echo " include/linux/autoconf.h or $@ are missing."; \
468 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
469 echo; \
470 /bin/false)
471
472endif # KBUILD_EXTMOD
473
474else
475# Dummy target needed, because used as prerequisite
476include/config/auto.conf: ;
477endif # $(dot-config)
478
479# The all: target is the default when no target is given on the
480# command line.
481# This allow a user to issue only 'make' to build a kernel including modules
482# Defaults vmlinux but it is usually overridden in the arch makefile
483all: vmlinux
484
485ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486CFLAGS += -Os
487else
488CFLAGS += -O2
489endif
490
491include $(srctree)/arch/$(ARCH)/Makefile
492
493ifdef CONFIG_FRAME_POINTER
494CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
495else
496CFLAGS += -fomit-frame-pointer
497endif
498
499ifdef CONFIG_DEBUG_INFO
500CFLAGS += -g
501endif
502
503# Force gcc to behave correct even for buggy distributions
504CFLAGS += $(call cc-option, -fno-stack-protector)
505
506# arch Makefile may override CC so keep this after arch Makefile is included
507NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
508CHECKFLAGS += $(NOSTDINC_FLAGS)
509
510# warn about C99 declaration after statement
511CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
512
513# disable pointer signed / unsigned warnings in gcc 4.0
514CFLAGS += $(call cc-option,-Wno-pointer-sign,)
515
516# Default kernel image to build when no specific target is given.
517# KBUILD_IMAGE may be overruled on the command line or
518# set in the environment
519# Also any assignments in arch/$(ARCH)/Makefile take precedence over
520# this default value
521export KBUILD_IMAGE ?= vmlinux
522
523#
524# INSTALL_PATH specifies where to place the updated kernel and system map
525# images. Default is /boot, but you can set it to other values
526export INSTALL_PATH ?= /boot
527
528#
529# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
530# relocations required by build roots. This is not defined in the
531# makefile but the argument can be passed to make if needed.
532#
533
534MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
535export MODLIB
536
537#
538# INSTALL_MOD_STRIP, if defined, will cause modules to be
539# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
540# the default option --strip-debug will be used. Otherwise,
541# INSTALL_MOD_STRIP will used as the options to the strip command.
542
543ifdef INSTALL_MOD_STRIP
544ifeq ($(INSTALL_MOD_STRIP),1)
545mod_strip_cmd = $(STRIP) --strip-debug
546else
547mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
548endif # INSTALL_MOD_STRIP=1
549else
550mod_strip_cmd = true
551endif # INSTALL_MOD_STRIP
552export mod_strip_cmd
553
554
555ifeq ($(KBUILD_EXTMOD),)
556core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
557
558vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
559 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
560 $(net-y) $(net-m) $(libs-y) $(libs-m)))
561
562vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
563 $(init-n) $(init-) \
564 $(core-n) $(core-) $(drivers-n) $(drivers-) \
565 $(net-n) $(net-) $(libs-n) $(libs-))))
566
567init-y := $(patsubst %/, %/built-in.o, $(init-y))
568core-y := $(patsubst %/, %/built-in.o, $(core-y))
569drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
570net-y := $(patsubst %/, %/built-in.o, $(net-y))
571libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
572libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
573libs-y := $(libs-y1) $(libs-y2)
574
575# Build vmlinux
576# ---------------------------------------------------------------------------
577# vmlinux is built from the objects selected by $(vmlinux-init) and
578# $(vmlinux-main). Most are built-in.o files from top-level directories
579# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
580# Ordering when linking is important, and $(vmlinux-init) must be first.
581#
582# vmlinux
583# ^
584# |
585# +-< $(vmlinux-init)
586# | +--< init/version.o + more
587# |
588# +--< $(vmlinux-main)
589# | +--< driver/built-in.o mm/built-in.o + more
590# |
591# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
592#
593# vmlinux version (uname -v) cannot be updated during normal
594# descending-into-subdirs phase since we do not yet know if we need to
595# update vmlinux.
596# Therefore this step is delayed until just before final link of vmlinux -
597# except in the kallsyms case where it is done just before adding the
598# symbols to the kernel.
599#
600# System.map is generated to document addresses of all kernel symbols
601
602vmlinux-init := $(head-y) $(init-y)
603vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
604vmlinux-all := $(vmlinux-init) $(vmlinux-main)
605vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
606
607# Rule to link vmlinux - also used during CONFIG_KALLSYMS
608# May be overridden by arch/$(ARCH)/Makefile
609quiet_cmd_vmlinux__ ?= LD $@
610 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
611 -T $(vmlinux-lds) $(vmlinux-init) \
612 --start-group $(vmlinux-main) --end-group \
613 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
614
615# Generate new vmlinux version
616quiet_cmd_vmlinux_version = GEN .version
617 cmd_vmlinux_version = set -e; \
618 if [ ! -r .version ]; then \
619 rm -f .version; \
620 echo 1 >.version; \
621 else \
622 mv .version .old_version; \
623 expr 0$$(cat .old_version) + 1 >.version; \
624 fi; \
625 $(MAKE) $(build)=init
626
627# Generate System.map
628quiet_cmd_sysmap = SYSMAP
629 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
630
631# Link of vmlinux
632# If CONFIG_KALLSYMS is set .version is already updated
633# Generate System.map and verify that the content is consistent
634# Use + in front of the vmlinux_version rule to silent warning with make -j2
635# First command is ':' to allow us to use + in front of the rule
636define rule_vmlinux__
637 :
638 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
639
640 $(call cmd,vmlinux__)
641 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
642
643 $(Q)$(if $($(quiet)cmd_sysmap), \
644 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
645 $(cmd_sysmap) $@ System.map; \
646 if [ $$? -ne 0 ]; then \
647 rm -f $@; \
648 /bin/false; \
649 fi;
650 $(verify_kallsyms)
651endef
652
653
654ifdef CONFIG_KALLSYMS
655# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
656# It's a three stage process:
657# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
658# empty
659# Running kallsyms on that gives us .tmp_kallsyms1.o with
660# the right size - vmlinux version (uname -v) is updated during this step
661# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
662# but due to the added section, some addresses have shifted.
663# From here, we generate a correct .tmp_kallsyms2.o
664# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
665# o Verify that the System.map from vmlinux matches the map from
666# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
667# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
668# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
669# temporary bypass to allow the kernel to be built while the
670# maintainers work out what went wrong with kallsyms.
671
672ifdef CONFIG_KALLSYMS_EXTRA_PASS
673last_kallsyms := 3
674else
675last_kallsyms := 2
676endif
677
678kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
679
680define verify_kallsyms
681 $(Q)$(if $($(quiet)cmd_sysmap), \
682 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
683 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
684 $(Q)cmp -s System.map .tmp_System.map || \
685 (echo Inconsistent kallsyms data; \
686 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
687 rm .tmp_kallsyms* ; /bin/false )
688endef
689
690# Update vmlinux version before link
691# Use + in front of this rule to silent warning about make -j1
692# First command is ':' to allow us to use + in front of this rule
693cmd_ksym_ld = $(cmd_vmlinux__)
694define rule_ksym_ld
695 :
696 +$(call cmd,vmlinux_version)
697 $(call cmd,vmlinux__)
698 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
699endef
700
701# Generate .S file with all kernel symbols
702quiet_cmd_kallsyms = KSYM $@
703 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
704 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
705
706.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
707 $(call if_changed_dep,as_o_S)
708
709.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
710 $(call cmd,kallsyms)
711
712# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
713.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
714 $(call if_changed_rule,ksym_ld)
715
716.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
717 $(call if_changed,vmlinux__)
718
719.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
720 $(call if_changed,vmlinux__)
721
722# Needs to visit scripts/ before $(KALLSYMS) can be used.
723$(KALLSYMS): scripts ;
724
725# Generate some data for debugging strange kallsyms problems
726debug_kallsyms: .tmp_map$(last_kallsyms)
727
728.tmp_map%: .tmp_vmlinux% FORCE
729 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
730
731.tmp_map3: .tmp_map2
732
733.tmp_map2: .tmp_map1
734
735endif # ifdef CONFIG_KALLSYMS
736
737# vmlinux image - including updated kernel symbols
738vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
739ifdef CONFIG_HEADERS_CHECK
740 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
741endif
742 $(call if_changed_rule,vmlinux__)
743 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
744 $(Q)rm -f .old_version
745
746# The actual objects are generated when descending,
747# make sure no implicit rule kicks in
748$(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
756PHONY += $(vmlinux-dirs)
757$(vmlinux-dirs): prepare scripts
758 $(Q)$(MAKE) $(build)=$@
759
760# Build the kernel release string
761#
762# The KERNELRELEASE value built here is stored in the file
763# include/config/kernel.release, and is used when executing several
764# make targets, such as "make install" or "make modules_install."
765#
766# The eventual kernel release string consists of the following fields,
767# shown in a hierarchical format to show how smaller parts are concatenated
768# to form the larger and final value, with values coming from places like
769# the Makefile, kernel config options, make command line options and/or
770# SCM tag information.
771#
772# $(KERNELVERSION)
773# $(VERSION) eg, 2
774# $(PATCHLEVEL) eg, 6
775# $(SUBLEVEL) eg, 18
776# $(EXTRAVERSION) eg, -rc6
777# $(localver-full)
778# $(localver)
779# localversion* (files without backups, containing '~')
780# $(CONFIG_LOCALVERSION) (from kernel config setting)
781# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
782# ./scripts/setlocalversion (SCM tag, if one exists)
783# $(LOCALVERSION) (from make command line if provided)
784#
785# Note how the final $(localver-auto) string is included *only* if the
786# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
787# moment, only git is supported but other SCMs can edit the script
788# scripts/setlocalversion and add the appropriate checks as needed.
789
790pattern = ".*/localversion[^~]*"
791string = $(shell cat /dev/null \
792 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
793
794localver = $(subst $(space),, $(string) \
795 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
796
797# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
798# and if the SCM is know a tag from the SCM is appended.
799# The appended tag is determined by the SCM used.
800#
801# Currently, only git is supported.
802# Other SCMs can edit scripts/setlocalversion and add the appropriate
803# checks as needed.
804ifdef CONFIG_LOCALVERSION_AUTO
805 _localver-auto = $(shell $(CONFIG_SHELL) \
806 $(srctree)/scripts/setlocalversion $(srctree))
807 localver-auto = $(LOCALVERSION)$(_localver-auto)
808endif
809
810localver-full = $(localver)$(localver-auto)
811
812# Store (new) KERNELRELASE string in include/config/kernel.release
813kernelrelease = $(KERNELVERSION)$(localver-full)
814include/config/kernel.release: include/config/auto.conf FORCE
815 $(Q)rm -f $@
816 $(Q)echo $(kernelrelease) > $@
817
818
819# Things we need to do before we recursively start building the kernel
820# or the modules are listed in "prepare".
821# A multi level approach is used. prepareN is processed before prepareN-1.
822# archprepare is used in arch Makefiles and when processed asm symlink,
823# version.h and scripts_basic is processed / created.
824
825# Listed in dependency order
826PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
827
828# prepare3 is used to check if we are building in a separate output directory,
829# and if so do:
830# 1) Check that make has not been executed in the kernel src $(srctree)
831# 2) Create the include2 directory, used for the second asm symlink
832prepare3: include/config/kernel.release
833ifneq ($(KBUILD_SRC),)
834 @echo ' Using $(srctree) as source for kernel'
835 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
836 echo " $(srctree) is not clean, please run 'make mrproper'";\
837 echo " in the '$(srctree)' directory.";\
838 /bin/false; \
839 fi;
840 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
841 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
842endif
843
844# prepare2 creates a makefile if using a separate output directory
845prepare2: prepare3 outputmakefile
846
847prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
848 include/asm include/config/auto.conf
849ifneq ($(KBUILD_MODULES),)
850 $(Q)mkdir -p $(MODVERDIR)
851 $(Q)rm -f $(MODVERDIR)/*
852endif
853
854archprepare: prepare1 scripts_basic
855
856prepare0: archprepare FORCE
857 $(Q)$(MAKE) $(build)=.
858
859# All the preparing..
860prepare: prepare0
861
862# Leave this as default for preprocessing vmlinux.lds.S, which is now
863# done in arch/$(ARCH)/kernel/Makefile
864
865export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
866
867# FIXME: The asm symlink changes when $(ARCH) changes. That's
868# hard to detect, but I suppose "make mrproper" is a good idea
869# before switching between archs anyway.
870
871include/asm:
872 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
873 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
874 @ln -fsn asm-$(ARCH) $@
875
876# Generate some files
877# ---------------------------------------------------------------------------
878
879# KERNELRELEASE can change from a few different places, meaning version.h
880# needs to be updated, so this check is forced on all builds
881
882uts_len := 64
883define filechk_utsrelease.h
884 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
885 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
886 exit 1; \
887 fi; \
888 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
889endef
890
891define filechk_version.h
892 (echo \#define LINUX_VERSION_CODE $(shell \
893 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
894 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
895endef
896
897include/linux/version.h: $(srctree)/Makefile FORCE
898 $(call filechk,version.h)
899
900include/linux/utsrelease.h: include/config/kernel.release FORCE
901 $(call filechk,utsrelease.h)
902
903# ---------------------------------------------------------------------------
904
905PHONY += depend dep
906depend dep:
907 @echo '*** Warning: make $@ is unnecessary now.'
908
909# ---------------------------------------------------------------------------
910# Kernel headers
911INSTALL_HDR_PATH=$(objtree)/usr
912export INSTALL_HDR_PATH
913
914HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
915
916PHONY += headers_install_all
917headers_install_all: include/linux/version.h scripts_basic FORCE
918 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
919 $(Q)for arch in $(HDRARCHES); do \
920 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
921 done
922
923PHONY += headers_install
924headers_install: include/linux/version.h scripts_basic FORCE
925 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
926 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
927 exit 1 ; fi
928 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
929 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
930
931PHONY += headers_check_all
932headers_check_all: headers_install_all
933 $(Q)for arch in $(HDRARCHES); do \
934 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
935 done
936
937PHONY += headers_check
938headers_check: headers_install
939 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
940
941# ---------------------------------------------------------------------------
942# Modules
943
944ifdef CONFIG_MODULES
945
946# By default, build modules as well
947
948all: modules
949
950# Build modules
951
952PHONY += modules
953modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
954 @echo ' Building modules, stage 2.';
955 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
956
957
958# Target to prepare building external modules
959PHONY += modules_prepare
960modules_prepare: prepare scripts
961
962# Target to install modules
963PHONY += modules_install
964modules_install: _modinst_ _modinst_post
965
966PHONY += _modinst_
967_modinst_:
968 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
969 echo "Warning: you may need to install module-init-tools"; \
970 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
971 sleep 1; \
972 fi
973 @rm -rf $(MODLIB)/kernel
974 @rm -f $(MODLIB)/source
975 @mkdir -p $(MODLIB)/kernel
976 @ln -s $(srctree) $(MODLIB)/source
977 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
978 rm -f $(MODLIB)/build ; \
979 ln -s $(objtree) $(MODLIB)/build ; \
980 fi
981 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
982
983# If System.map exists, run depmod. This deliberately does not have a
984# dependency on System.map since that would run the dependency tree on
985# vmlinux. This depmod is only for convenience to give the initial
986# boot a modules.dep even before / is mounted read-write. However the
987# boot script depmod is the master version.
988ifeq "$(strip $(INSTALL_MOD_PATH))" ""
989depmod_opts :=
990else
991depmod_opts := -b $(INSTALL_MOD_PATH) -r
992endif
993PHONY += _modinst_post
994_modinst_post: _modinst_
995 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
996
997else # CONFIG_MODULES
998
999# Modules not configured
1000# ---------------------------------------------------------------------------
1001
1002modules modules_install: FORCE
1003 @echo
1004 @echo "The present kernel configuration has modules disabled."
1005 @echo "Type 'make config' and enable loadable module support."
1006 @echo "Then build a kernel with module support enabled."
1007 @echo
1008 @exit 1
1009
1010endif # CONFIG_MODULES
1011
1012###
1013# Cleaning is done on three levels.
1014# make clean Delete most generated files
1015# Leave enough to build external modules
1016# make mrproper Delete the current configuration, and all generated files
1017# make distclean Remove editor backup files, patch leftover files and the like
1018
1019# Directories & files removed with 'make clean'
1020CLEAN_DIRS += $(MODVERDIR)
1021CLEAN_FILES += vmlinux System.map \
1022 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1023
1024# Directories & files removed with 'make mrproper'
1025MRPROPER_DIRS += include/config include2 usr/include
1026MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1027 include/linux/autoconf.h include/linux/version.h \
1028 include/linux/utsrelease.h \
1029 Module.symvers tags TAGS cscope*
1030
1031# clean - Delete most, but leave enough to build external modules
1032#
1033clean: rm-dirs := $(CLEAN_DIRS)
1034clean: rm-files := $(CLEAN_FILES)
1035clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1036
1037PHONY += $(clean-dirs) clean archclean
1038$(clean-dirs):
1039 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1040
1041clean: archclean $(clean-dirs)
1042 $(call cmd,rmdirs)
1043 $(call cmd,rmfiles)
1044 @find . $(RCS_FIND_IGNORE) \
1045 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1046 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1047 -o -name '*.symtypes' \) \
1048 -type f -print | xargs rm -f
1049
1050# mrproper - Delete all generated files, including .config
1051#
1052mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1053mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1054mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1055
1056PHONY += $(mrproper-dirs) mrproper archmrproper
1057$(mrproper-dirs):
1058 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1059
1060mrproper: clean archmrproper $(mrproper-dirs)
1061 $(call cmd,rmdirs)
1062 $(call cmd,rmfiles)
1063
1064# distclean
1065#
1066PHONY += distclean
1067
1068distclean: mrproper
1069 @find $(srctree) $(RCS_FIND_IGNORE) \
1070 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1071 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1072 -o -name '.*.rej' -o -size 0 \
1073 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1074 -type f -print | xargs rm -f
1075
1076
1077# Packaging of the kernel to various formats
1078# ---------------------------------------------------------------------------
1079# rpm target kept for backward compatibility
1080package-dir := $(srctree)/scripts/package
1081
1082%pkg: include/config/kernel.release FORCE
1083 $(Q)$(MAKE) $(build)=$(package-dir) $@
1084rpm: include/config/kernel.release FORCE
1085 $(Q)$(MAKE) $(build)=$(package-dir) $@
1086
1087
1088# Brief documentation of the typical targets used
1089# ---------------------------------------------------------------------------
1090
1091boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1092boards := $(notdir $(boards))
1093
1094help:
1095 @echo 'Cleaning targets:'
1096 @echo ' clean - Remove most generated files but keep the config and'
1097 @echo ' enough build support to build external modules'
1098 @echo ' mrproper - Remove all generated files + config + various backup files'
1099 @echo ' distclean - mrproper + remove editor backup and patch files'
1100 @echo ''
1101 @echo 'Configuration targets:'
1102 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1103 @echo ''
1104 @echo 'Other generic targets:'
1105 @echo ' all - Build all targets marked with [*]'
1106 @echo '* vmlinux - Build the bare kernel'
1107 @echo '* modules - Build all modules'
1108 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1109 @echo ' dir/ - Build all files in dir and below'
1110 @echo ' dir/file.[ois] - Build specified target only'
1111 @echo ' dir/file.ko - Build module including final link'
1112 @echo ' rpm - Build a kernel as an RPM package'
1113 @echo ' tags/TAGS - Generate tags file for editors'
1114 @echo ' cscope - Generate cscope index'
1115 @echo ' kernelrelease - Output the release version string'
1116 @echo ' kernelversion - Output the version stored in Makefile'
1117 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1118 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1119 echo ' (default: $(INSTALL_HDR_PATH))'; \
1120 fi
1121 @echo ''
1122 @echo 'Static analysers'
1123 @echo ' checkstack - Generate a list of stack hogs'
1124 @echo ' namespacecheck - Name space analysis on compiled kernel'
1125 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1126 echo ' headers_check - Sanity check on exported headers'; \
1127 fi
1128 @echo ''
1129 @echo 'Kernel packaging:'
1130 @$(MAKE) $(build)=$(package-dir) help
1131 @echo ''
1132 @echo 'Documentation targets:'
1133 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1134 @echo ''
1135 @echo 'Architecture specific targets ($(ARCH)):'
1136 @$(if $(archhelp),$(archhelp),\
1137 echo ' No architecture specific help defined for $(ARCH)')
1138 @echo ''
1139 @$(if $(boards), \
1140 $(foreach b, $(boards), \
1141 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1142 echo '')
1143
1144 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1145 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1146 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1147 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1148 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1149 @echo ''
1150 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1151 @echo 'For further info see the ./README file'
1152
1153
1154# Documentation targets
1155# ---------------------------------------------------------------------------
1156%docs: scripts_basic FORCE
1157 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1158
1159else # KBUILD_EXTMOD
1160
1161###
1162# External module support.
1163# When building external modules the kernel used as basis is considered
1164# read-only, and no consistency checks are made and the make
1165# system is not used on the basis kernel. If updates are required
1166# in the basis kernel ordinary make commands (without M=...) must
1167# be used.
1168#
1169# The following are the only valid targets when building external
1170# modules.
1171# make M=dir clean Delete all automatically generated files
1172# make M=dir modules Make all modules in specified dir
1173# make M=dir Same as 'make M=dir modules'
1174# make M=dir modules_install
1175# Install the modules built in the module directory
1176# Assumes install directory is already created
1177
1178# We are always building modules
1179KBUILD_MODULES := 1
1180PHONY += crmodverdir
1181crmodverdir:
1182 $(Q)mkdir -p $(MODVERDIR)
1183 $(Q)rm -f $(MODVERDIR)/*
1184
1185PHONY += $(objtree)/Module.symvers
1186$(objtree)/Module.symvers:
1187 @test -e $(objtree)/Module.symvers || ( \
1188 echo; \
1189 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1190 echo " is missing; modules will have no dependencies and modversions."; \
1191 echo )
1192
1193module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1194PHONY += $(module-dirs) modules
1195$(module-dirs): crmodverdir $(objtree)/Module.symvers
1196 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1197
1198modules: $(module-dirs)
1199 @echo ' Building modules, stage 2.';
1200 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1201
1202PHONY += modules_install
1203modules_install: _emodinst_ _emodinst_post
1204
1205install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1206PHONY += _emodinst_
1207_emodinst_:
1208 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1209 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1210
1211# Run depmod only is we have System.map and depmod is executable
1212quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1213 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1214 $(DEPMOD) -ae -F System.map \
1215 $(if $(strip $(INSTALL_MOD_PATH)), \
1216 -b $(INSTALL_MOD_PATH) -r) \
1217 $(KERNELRELEASE); \
1218 fi
1219
1220PHONY += _emodinst_post
1221_emodinst_post: _emodinst_
1222 $(call cmd,depmod)
1223
1224clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1225
1226PHONY += $(clean-dirs) clean
1227$(clean-dirs):
1228 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1229
1230clean: rm-dirs := $(MODVERDIR)
1231clean: $(clean-dirs)
1232 $(call cmd,rmdirs)
1233 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1234 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1235 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1236 -type f -print | xargs rm -f
1237
1238help:
1239 @echo ' Building external modules.'
1240 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1241 @echo ''
1242 @echo ' modules - default target, build the module(s)'
1243 @echo ' modules_install - install the module'
1244 @echo ' clean - remove generated files in module directory only'
1245 @echo ''
1246
1247# Dummies...
1248PHONY += prepare scripts
1249prepare: ;
1250scripts: ;
1251endif # KBUILD_EXTMOD
1252
1253# Generate tags for editors
1254# ---------------------------------------------------------------------------
1255
1256#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1257#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1258#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1259
1260ifeq ($(src),$(obj))
1261__srctree =
1262else
1263__srctree = $(srctree)/
1264endif
1265
1266ifeq ($(ALLSOURCE_ARCHS),)
1267ifeq ($(ARCH),um)
1268ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1269else
1270ALLINCLUDE_ARCHS := $(ARCH)
1271endif
1272else
1273#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1274ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1275endif
1276
1277ALLSOURCE_ARCHS := $(ARCH)
1278
1279define find-sources
1280 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1281 \( -name include -o -name arch \) -prune -o \
1282 -name $1 -print; \
1283 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1284 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1285 -name $1 -print; \
1286 done ; \
1287 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1288 -name $1 -print; \
1289 find $(__srctree)include $(RCS_FIND_IGNORE) \
1290 \( -name config -o -name 'asm-*' \) -prune \
1291 -o -name $1 -print; \
1292 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1293 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1294 -name $1 -print; \
1295 done ; \
1296 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1297 -name $1 -print )
1298endef
1299
1300define all-sources
1301 $(call find-sources,'*.[chS]')
1302endef
1303define all-kconfigs
1304 $(call find-sources,'Kconfig*')
1305endef
1306define all-defconfigs
1307 $(call find-sources,'defconfig')
1308endef
1309
1310define xtags
1311 if $1 --version 2>&1 | grep -iq exuberant; then \
1312 $(all-sources) | xargs $1 -a \
1313 -I __initdata,__exitdata,__acquires,__releases \
1314 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1315 --extra=+f --c-kinds=+px \
1316 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1317 $(all-kconfigs) | xargs $1 -a \
1318 --langdef=kconfig \
1319 --language-force=kconfig \
1320 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1321 $(all-defconfigs) | xargs -r $1 -a \
1322 --langdef=dotconfig \
1323 --language-force=dotconfig \
1324 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1325 elif $1 --version 2>&1 | grep -iq emacs; then \
1326 $(all-sources) | xargs $1 -a; \
1327 $(all-kconfigs) | xargs $1 -a \
1328 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1329 $(all-defconfigs) | xargs -r $1 -a \
1330 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1331 else \
1332 $(all-sources) | xargs $1 -a; \
1333 fi
1334endef
1335
1336quiet_cmd_cscope-file = FILELST cscope.files
1337 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1338
1339quiet_cmd_cscope = MAKE cscope.out
1340 cmd_cscope = cscope -b
1341
1342cscope: FORCE
1343 $(call cmd,cscope-file)
1344 $(call cmd,cscope)
1345
1346quiet_cmd_TAGS = MAKE $@
1347define cmd_TAGS
1348 rm -f $@; \
1349 $(call xtags,etags)
1350endef
1351
1352TAGS: FORCE
1353 $(call cmd,TAGS)
1354
1355quiet_cmd_tags = MAKE $@
1356define cmd_tags
1357 rm -f $@; \
1358 $(call xtags,ctags)
1359endef
1360
1361tags: FORCE
1362 $(call cmd,tags)
1363
1364
1365# Scripts to check various things for consistency
1366# ---------------------------------------------------------------------------
1367
1368includecheck:
1369 find * $(RCS_FIND_IGNORE) \
1370 -name '*.[hcS]' -type f -print | sort \
1371 | xargs $(PERL) -w scripts/checkincludes.pl
1372
1373versioncheck:
1374 find * $(RCS_FIND_IGNORE) \
1375 -name '*.[hcS]' -type f -print | sort \
1376 | xargs $(PERL) -w scripts/checkversion.pl
1377
1378namespacecheck:
1379 $(PERL) $(srctree)/scripts/namespace.pl
1380
1381endif #ifeq ($(config-targets),1)
1382endif #ifeq ($(mixed-targets),1)
1383
1384PHONY += checkstack kernelrelease kernelversion
1385
1386# UML needs a little special treatment here. It wants to use the host
1387# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1388# else wants $(ARCH), including people doing cross-builds, which means
1389# that $(SUBARCH) doesn't work here.
1390ifeq ($(ARCH), um)
1391CHECKSTACK_ARCH := $(SUBARCH)
1392else
1393CHECKSTACK_ARCH := $(ARCH)
1394endif
1395checkstack:
1396 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1397 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1398
1399kernelrelease:
1400 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1401 $(error kernelrelease not valid - run 'make prepare' to update it))
1402kernelversion:
1403 @echo $(KERNELVERSION)
1404
1405# Single targets
1406# ---------------------------------------------------------------------------
1407# Single targets are compatible with:
1408# - build whith mixed source and output
1409# - build with separate output dir 'make O=...'
1410# - external modules
1411#
1412# target-dir => where to store outputfile
1413# build-dir => directory in kernel source tree to use
1414
1415ifeq ($(KBUILD_EXTMOD),)
1416 build-dir = $(patsubst %/,%,$(dir $@))
1417 target-dir = $(dir $@)
1418else
1419 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1420 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1421 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1422endif
1423
1424%.s: %.c prepare scripts FORCE
1425 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1426%.i: %.c prepare scripts FORCE
1427 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1428%.o: %.c prepare scripts FORCE
1429 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1430%.lst: %.c prepare scripts FORCE
1431 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1432%.s: %.S prepare scripts FORCE
1433 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1434%.o: %.S prepare scripts FORCE
1435 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1436%.symtypes: %.c prepare scripts FORCE
1437 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1438
1439# Modules
1440/ %/: prepare scripts FORCE
1441 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1442 $(build)=$(build-dir)
1443%.ko: prepare scripts FORCE
1444 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1445 $(build)=$(build-dir) $(@:.ko=.o)
1446 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1447
1448# FIXME Should go into a make.lib or something
1449# ===========================================================================
1450
1451quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1452 cmd_rmdirs = rm -rf $(rm-dirs)
1453
1454quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1455 cmd_rmfiles = rm -f $(rm-files)
1456
1457
1458a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1459 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1460 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1461
1462quiet_cmd_as_o_S = AS $@
1463cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1464
1465# read all saved command lines
1466
1467targets := $(wildcard $(sort $(targets)))
1468cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1469
1470ifneq ($(cmd_files),)
1471 $(cmd_files): ; # Do not try to update included dependency files
1472 include $(cmd_files)
1473endif
1474
1475# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1476# Usage:
1477# $(Q)$(MAKE) $(clean)=dir
1478clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1479
1480endif # skip-makefile
1481
1482PHONY += FORCE
1483FORCE:
1484
1485# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1486Makefile: ;
1487
1488# Declare the contents of the .PHONY variable as phony. We keep that
1489# information in a variable se we can use it in if_changed and friends.
1490.PHONY: $(PHONY)