1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 18
4 EXTRAVERSION = -prep
5 RHEL_MAJOR = 5
6 RHEL_MINOR = 3
7 NAME=Avast! A bilge rat!
8
9 # *DOCUMENTATION*
10 # To see a list of typical targets execute "make help"
11 # More info can be located in ./README
12 # Comments in this file are targeted only to the developer, do not
13 # expect to learn how to build the kernel reading this file.
14
15 # Do not print "Entering directory ..."
16 MAKEFLAGS += --no-print-directory
17
18 # We are using a recursive build, so we need to do a little thinking
19 # to get the ordering right.
20 #
21 # Most importantly: sub-Makefiles should only ever modify files in
22 # their own directory. If in some directory we have a dependency on
23 # a file in another dir (which doesn't happen often, but it's often
24 # unavoidable when linking the built-in.o targets which finally
25 # turn into vmlinux), we will call a sub make in that other dir, and
26 # after that we are sure that everything which is in that other dir
27 # is now up to date.
28 #
29 # The only cases where we need to modify files which have global
30 # effects are thus separated out and done before the recursive
31 # descending is started. They are now explicitly listed as the
32 # prepare rule.
33
34 # To put more focus on warnings, be less verbose as default
35 # Use 'make V=1' to see the full commands
36
37 ifdef V
38 ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
40 endif
41 endif
42 ifndef KBUILD_VERBOSE
43 KBUILD_VERBOSE = 0
44 endif
45
46 # Call checker as part of compilation of C files
47 # Use 'make C=1' to enable checking (sparse, by default)
48 # Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....'
49
50 ifdef C
51 ifeq ("$(origin C)", "command line")
52 KBUILD_CHECKSRC = $(C)
53 endif
54 endif
55 ifndef KBUILD_CHECKSRC
56 KBUILD_CHECKSRC = 0
57 endif
58
59 # Use make M=dir to specify directory of external module to build
60 # Old syntax make ... SUBDIRS=$PWD is still supported
61 # Setting the environment variable KBUILD_EXTMOD take precedence
62 ifdef SUBDIRS
63 KBUILD_EXTMOD ?= $(SUBDIRS)
64 endif
65 ifdef M
66 ifeq ("$(origin M)", "command line")
67 KBUILD_EXTMOD := $(M)
68 endif
69 endif
70
71
72 # kbuild supports saving output files in a separate directory.
73 # To locate output files in a separate directory two syntaxes are supported.
74 # In both cases the working directory must be the root of the kernel src.
75 # 1) O=
76 # Use "make O=dir/to/store/output/files/"
77 #
78 # 2) Set KBUILD_OUTPUT
79 # Set the environment variable KBUILD_OUTPUT to point to the directory
80 # where the output files shall be placed.
81 # export KBUILD_OUTPUT=dir/to/store/output/files/
82 # make
83 #
84 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
85 # variable.
86
87
88 # KBUILD_SRC is set on invocation of make in OBJ directory
89 # KBUILD_SRC is not intended to be used by the regular user (for now)
90 ifeq ($(KBUILD_SRC),)
91
92 # OK, Make called in directory where kernel src resides
93 # Do we want to locate output files in a separate directory?
94 ifdef O
95 ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
97 endif
98 endif
99
100 # That's our default target when none is given on the command line
101 PHONY := _all
102 _all:
103
104 ifneq ($(KBUILD_OUTPUT),)
105 # Invoke a second make in the output directory, passing relevant variables
106 # check that the output directory actually exists
107 saved-output := $(KBUILD_OUTPUT)
108 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
109 $(if $(KBUILD_OUTPUT),, \
110 $(error output directory "$(saved-output)" does not exist))
111
112 PHONY += $(MAKECMDGOALS)
113
114 $(filter-out _all,$(MAKECMDGOALS)) _all:
115 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
116 KBUILD_SRC=$(CURDIR) \
117 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
118
119 # Leave processing to above invocation of make
120 skip-makefile := 1
121 endif # ifneq ($(KBUILD_OUTPUT),)
122 endif # ifeq ($(KBUILD_SRC),)
123
124 # We process the rest of the Makefile if this is the final invocation of make
125 ifeq ($(skip-makefile),)
126
127 # If building an external module we do not care about the all: rule
128 # but instead _all depend on modules
129 PHONY += all
130 ifeq ($(KBUILD_EXTMOD),)
131 _all: all
132 else
133 _all: modules
134 endif
135
136 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
137 TOPDIR := $(srctree)
138 # FIXME - TOPDIR is obsolete, use srctree/objtree
139 objtree := $(CURDIR)
140 src := $(srctree)
141 obj := $(objtree)
142
143 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
144
145 export srctree objtree VPATH TOPDIR
146
147
148 # SUBARCH tells the usermode build what the underlying arch is. That is set
149 # first, and if a usermode build is happening, the "ARCH=um" on the command
150 # line overrides the setting of ARCH below. If a native build is happening,
151 # then ARCH is assigned, getting whatever value it gets normally, and
152 # SUBARCH is subsequently ignored.
153
154 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
155 -e s/arm.*/arm/ -e s/sa110/arm/ \
156 -e s/s390x/s390/ -e s/parisc64/parisc/ \
157 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
158
159 # Cross compiling and selecting different set of gcc/bin-utils
160 # ---------------------------------------------------------------------------
161 #
162 # When performing cross compilation for other architectures ARCH shall be set
163 # to the target architecture. (See arch/* for the possibilities).
164 # ARCH can be set during invocation of make:
165 # make ARCH=ia64
166 # Another way is to have ARCH set in the environment.
167 # The default ARCH is the host where make is executed.
168
169 # CROSS_COMPILE specify the prefix used for all executables used
170 # during compilation. Only gcc and related bin-utils executables
171 # are prefixed with $(CROSS_COMPILE).
172 # CROSS_COMPILE can be set on the command line
173 # make CROSS_COMPILE=ia64-linux-
174 # Alternatively CROSS_COMPILE can be set in the environment.
175 # Default value for CROSS_COMPILE is not to prefix executables
176 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
177
178 ARCH ?= $(SUBARCH)
179 CROSS_COMPILE ?=
180
181 # Architecture as present in compile.h
182 UTS_MACHINE := $(ARCH)
183
184 KCONFIG_CONFIG ?= .config
185
186 # SHELL used by kbuild
187 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
188 else if [ -x /bin/bash ]; then echo /bin/bash; \
189 else echo sh; fi ; fi)
190
191 HOSTCC = gcc
192 HOSTCXX = g++
193 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
194 HOSTCXXFLAGS = -O2
195
196 # Decide whether to build built-in, modular, or both.
197 # Normally, just do built-in.
198
199 KBUILD_MODULES :=
200 KBUILD_BUILTIN := 1
201
202 # If we have only "make modules", don't compile built-in objects.
203 # When we're building modules with modversions, we need to consider
204 # the built-in objects during the descend as well, in order to
205 # make sure the checksums are up to date before we record them.
206
207 ifeq ($(MAKECMDGOALS),modules)
208 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
209 endif
210
211 # If we have "make <whatever> modules", compile modules
212 # in addition to whatever we do anyway.
213 # Just "make" or "make all" shall build modules as well
214
215 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
216 KBUILD_MODULES := 1
217 endif
218
219 ifeq ($(MAKECMDGOALS),)
220 KBUILD_MODULES := 1
221 endif
222
223 export KBUILD_MODULES KBUILD_BUILTIN
224 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
225
226 # Beautify output
227 # ---------------------------------------------------------------------------
228 #
229 # Normally, we echo the whole command before executing it. By making
230 # that echo $($(quiet)$(cmd)), we now have the possibility to set
231 # $(quiet) to choose other forms of output instead, e.g.
232 #
233 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
234 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
235 #
236 # If $(quiet) is empty, the whole command will be printed.
237 # If it is set to "quiet_", only the short version will be printed.
238 # If it is set to "silent_", nothing will be printed at all, since
239 # the variable $(silent_cmd_cc_o_c) doesn't exist.
240 #
241 # A simple variant is to prefix commands with $(Q) - that's useful
242 # for commands that shall be hidden in non-verbose mode.
243 #
244 # $(Q)ln $@ :<
245 #
246 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
247 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
248
249 ifeq ($(KBUILD_VERBOSE),1)
250 quiet =
251 Q =
252 else
253 quiet=quiet_
254 Q = @
255 endif
256
257 # If the user is running make -s (silent mode), suppress echoing of
258 # commands
259
260 ifneq ($(findstring s,$(MAKEFLAGS)),)
261 quiet=silent_
262 endif
263
264 export quiet Q KBUILD_VERBOSE
265
266
267 # Look for make include files relative to root of kernel src
268 MAKEFLAGS += --include-dir=$(srctree)
269
270 # We need some generic definitions
271 include $(srctree)/scripts/Kbuild.include
272
273 # Make variables (CC, etc...)
274
275 AS = $(CROSS_COMPILE)as
276 LD = $(CROSS_COMPILE)ld
277 CC = $(CROSS_COMPILE)gcc
278 CPP = $(CC) -E
279 AR = $(CROSS_COMPILE)ar
280 NM = $(CROSS_COMPILE)nm
281 STRIP = $(CROSS_COMPILE)strip
282 OBJCOPY = $(CROSS_COMPILE)objcopy
283 OBJDUMP = $(CROSS_COMPILE)objdump
284 AWK = awk
285 GENKSYMS = scripts/genksyms/genksyms
286 DEPMOD = /sbin/depmod
287 KALLSYMS = scripts/kallsyms
288 PERL = perl
289 CHECK = sparse
290
291 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
292 MODFLAGS = -DMODULE
293 CFLAGS_MODULE = $(MODFLAGS)
294 AFLAGS_MODULE = $(MODFLAGS)
295 LDFLAGS_MODULE = -r
296 CFLAGS_KERNEL =
297 AFLAGS_KERNEL =
298
299
300 # Use LINUXINCLUDE when you must reference the include/ directory.
301 # Needed to be compatible with the O= option
302 LINUXINCLUDE := -Iinclude \
303 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
304 -include include/linux/autoconf.h
305
306 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
307
308 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
309 -fno-strict-aliasing -fno-common -Wstrict-prototypes -Wundef -Werror-implicit-function-declaration
310 AFLAGS := -D__ASSEMBLY__
311
312 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
313 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
314 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
315
316 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
317 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
318 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
319 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
320
321 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
322 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
323 export 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.
328 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
329
330 # Files to ignore in find ... statements
331
332 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
333 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
334
335 # ===========================================================================
336 # Rules shared between *config targets and build targets
337
338 # Basic helpers built in scripts/
339 PHONY += scripts_basic
340 scripts_basic:
341 $(Q)$(MAKE) $(build)=scripts/basic
342
343 # To avoid any implicit rule to kick in, define an empty command.
344 scripts/basic/%: scripts_basic ;
345
346 PHONY += outputmakefile
347 # outputmakefile generates a Makefile in the output directory, if using a
348 # separate output directory. This allows convenient use of make in the
349 # output directory.
350 outputmakefile:
351 ifneq ($(KBUILD_SRC),)
352 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
353 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
354 endif
355
356 # To make sure we do not include .config for any of the *config targets
357 # catch them early, and hand them over to scripts/kconfig/Makefile
358 # It is allowed to specify more targets when calling make, including
359 # mixing *config targets and build targets.
360 # For example 'make oldconfig all'.
361 # Detect when mixed targets is specified, and make a second invocation
362 # of make so .config is not included in this case either (for *config).
363
364 no-dot-config-targets := clean mrproper distclean \
365 cscope TAGS tags help %docs check% \
366 include/linux/version.h headers_% \
367 kernelrelease kernelversion
368
369 config-targets := 0
370 mixed-targets := 0
371 dot-config := 1
372
373 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
374 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
375 dot-config := 0
376 endif
377 endif
378
379 ifeq ($(KBUILD_EXTMOD),)
380 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
381 config-targets := 1
382 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
383 mixed-targets := 1
384 endif
385 endif
386 endif
387
388 ifeq ($(mixed-targets),1)
389 # ===========================================================================
390 # We're called with mixed targets (*config and build targets).
391 # Handle them one by one.
392
393 %:: FORCE
394 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
395
396 else
397 ifeq ($(config-targets),1)
398 # ===========================================================================
399 # *config targets only - make sure prerequisites are updated, and descend
400 # in scripts/kconfig to make the *config target
401
402 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
403 # KBUILD_DEFCONFIG may point out an alternative default configuration
404 # used for 'make defconfig'
405 include $(srctree)/arch/$(ARCH)/Makefile
406 export KBUILD_DEFCONFIG
407
408 config %config: scripts_basic outputmakefile FORCE
409 $(Q)mkdir -p include/linux include/config
410 $(Q)$(MAKE) $(build)=scripts/kconfig $@
411
412 else
413 # ===========================================================================
414 # Build targets only - this includes vmlinux, arch specific targets, clean
415 # targets and others. In general all targets except *config targets.
416
417 ifeq ($(KBUILD_EXTMOD),)
418 # Additional helpers built in scripts/
419 # Carefully list dependencies so we do not try to build scripts twice
420 # in parallel
421 PHONY += scripts
422 scripts: scripts_basic include/config/auto.conf
423 $(Q)$(MAKE) $(build)=$(@)
424
425 # Objects we will link into vmlinux / subdirs we need to visit
426 init-y := init/
427 drivers-y := drivers/ sound/
428 net-y := net/
429 libs-y := lib/
430 core-y := usr/
431 endif # KBUILD_EXTMOD
432
433 ifeq ($(dot-config),1)
434 # Read in config
435 -include include/config/auto.conf
436
437 ifeq ($(KBUILD_EXTMOD),)
438 # Read in dependencies to all Kconfig* files, make sure to run
439 # oldconfig if changes are detected.
440 -include include/config/auto.conf.cmd
441
442 # To avoid any implicit rule to kick in, define an empty command
443 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
444
445 # If .config is newer than include/config/auto.conf, someone tinkered
446 # with it and forgot to run make oldconfig.
447 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
448 # we execute the config step to be sure to catch updated Kconfig files
449 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
450 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
451 else
452 # external modules needs include/linux/autoconf.h and include/config/auto.conf
453 # but do not care if they are up-to-date. Use auto.conf to trigger the test
454 PHONY += include/config/auto.conf
455
456 include/config/auto.conf:
457 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
458 echo; \
459 echo " ERROR: Kernel configuration is invalid."; \
460 echo " include/linux/autoconf.h or $@ are missing."; \
461 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
462 echo; \
463 /bin/false)
464
465 endif # KBUILD_EXTMOD
466
467 else
468 # Dummy target needed, because used as prerequisite
469 include/config/auto.conf: ;
470 endif # $(dot-config)
471
472 # The all: target is the default when no target is given on the
473 # command line.
474 # This allow a user to issue only 'make' to build a kernel including modules
475 # Defaults vmlinux but it is usually overridden in the arch makefile
476 all: vmlinux
477
478 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
479 CFLAGS += -Os
480 else
481 CFLAGS += -O2
482 endif
483
484 include $(srctree)/arch/$(ARCH)/Makefile
485
486 ifdef CONFIG_FRAME_POINTER
487 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
488 else
489 CFLAGS += -fomit-frame-pointer
490 endif
491
492 ifdef CONFIG_DEBUG_INFO
493 CFLAGS += -g
494 endif
495
496 # Force gcc to behave correct even for buggy distributions
497 CFLAGS += $(call cc-option, -fno-stack-protector)
498
499 # arch Makefile may override CC so keep this after arch Makefile is included
500 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
501 CHECKFLAGS += $(NOSTDINC_FLAGS)
502
503 # warn about C99 declaration after statement
504 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
505
506 # disable pointer signed / unsigned warnings in gcc 4.0
507 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
508
509 # Default kernel image to build when no specific target is given.
510 # KBUILD_IMAGE may be overruled on the command line or
511 # set in the environment
512 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
513 # this default value
514 export KBUILD_IMAGE ?= vmlinux
515
516 #
517 # INSTALL_PATH specifies where to place the updated kernel and system map
518 # images. Default is /boot, but you can set it to other values
519 export INSTALL_PATH ?= /boot
520
521 #
522 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
523 # relocations required by build roots. This is not defined in the
524 # makefile but the argument can be passed to make if needed.
525 #
526
527 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
528 export MODLIB
529
530 #
531 # INSTALL_MOD_STRIP, if defined, will cause modules to be
532 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
533 # the default option --strip-debug will be used. Otherwise,
534 # INSTALL_MOD_STRIP will used as the options to the strip command.
535
536 ifdef INSTALL_MOD_STRIP
537 ifeq ($(INSTALL_MOD_STRIP),1)
538 mod_strip_cmd = $(STRIP) --strip-debug
539 else
540 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
541 endif # INSTALL_MOD_STRIP=1
542 else
543 mod_strip_cmd = true
544 endif # INSTALL_MOD_STRIP
545 export mod_strip_cmd
546
547
548 ifeq ($(KBUILD_EXTMOD),)
549 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
550
551 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
552 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
553 $(net-y) $(net-m) $(libs-y) $(libs-m)))
554
555 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
556 $(init-n) $(init-) \
557 $(core-n) $(core-) $(drivers-n) $(drivers-) \
558 $(net-n) $(net-) $(libs-n) $(libs-))))
559
560 init-y := $(patsubst %/, %/built-in.o, $(init-y))
561 core-y := $(patsubst %/, %/built-in.o, $(core-y))
562 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
563 net-y := $(patsubst %/, %/built-in.o, $(net-y))
564 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
565 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
566 libs-y := $(libs-y1) $(libs-y2)
567
568 # Build vmlinux
569 # ---------------------------------------------------------------------------
570 # vmlinux is built from the objects selected by $(vmlinux-init) and
571 # $(vmlinux-main). Most are built-in.o files from top-level directories
572 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
573 # Ordering when linking is important, and $(vmlinux-init) must be first.
574 #
575 # vmlinux
576 # ^
577 # |
578 # +-< $(vmlinux-init)
579 # | +--< init/version.o + more
580 # |
581 # +--< $(vmlinux-main)
582 # | +--< driver/built-in.o mm/built-in.o + more
583 # |
584 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
585 #
586 # vmlinux version (uname -v) cannot be updated during normal
587 # descending-into-subdirs phase since we do not yet know if we need to
588 # update vmlinux.
589 # Therefore this step is delayed until just before final link of vmlinux -
590 # except in the kallsyms case where it is done just before adding the
591 # symbols to the kernel.
592 #
593 # System.map is generated to document addresses of all kernel symbols
594
595 vmlinux-init := $(head-y) $(init-y)
596 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
597 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
598 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
599
600 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
601 # May be overridden by arch/$(ARCH)/Makefile
602 quiet_cmd_vmlinux__ ?= LD $@
603 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
604 -T $(vmlinux-lds) $(vmlinux-init) \
605 --start-group $(vmlinux-main) --end-group \
606 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
607
608 # Generate new vmlinux version
609 quiet_cmd_vmlinux_version = GEN .version
610 cmd_vmlinux_version = set -e; \
611 if [ ! -r .version ]; then \
612 rm -f .version; \
613 echo 1 >.version; \
614 else \
615 mv .version .old_version; \
616 expr 0$$(cat .old_version) + 1 >.version; \
617 fi; \
618 $(MAKE) $(build)=init
619
620 # Generate System.map
621 quiet_cmd_sysmap = SYSMAP
622 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
623
624 # Link of vmlinux
625 # If CONFIG_KALLSYMS is set .version is already updated
626 # Generate System.map and verify that the content is consistent
627 # Use + in front of the vmlinux_version rule to silent warning with make -j2
628 # First command is ':' to allow us to use + in front of the rule
629 define rule_vmlinux__
630 :
631 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
632
633 $(call cmd,vmlinux__)
634 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
635
636 $(Q)$(if $($(quiet)cmd_sysmap), \
637 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
638 $(cmd_sysmap) $@ System.map; \
639 if [ $$? -ne 0 ]; then \
640 rm -f $@; \
641 /bin/false; \
642 fi;
643 $(verify_kallsyms)
644 endef
645
646
647 ifdef CONFIG_KALLSYMS
648 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
649 # It's a three stage process:
650 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
651 # empty
652 # Running kallsyms on that gives us .tmp_kallsyms1.o with
653 # the right size - vmlinux version (uname -v) is updated during this step
654 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
655 # but due to the added section, some addresses have shifted.
656 # From here, we generate a correct .tmp_kallsyms2.o
657 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
658 # o Verify that the System.map from vmlinux matches the map from
659 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
660 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
661 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
662 # temporary bypass to allow the kernel to be built while the
663 # maintainers work out what went wrong with kallsyms.
664
665 ifdef CONFIG_KALLSYMS_EXTRA_PASS
666 last_kallsyms := 3
667 else
668 last_kallsyms := 2
669 endif
670
671 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
672
673 define verify_kallsyms
674 $(Q)$(if $($(quiet)cmd_sysmap), \
675 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
676 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
677 $(Q)cmp -s System.map .tmp_System.map || \
678 (echo Inconsistent kallsyms data; \
679 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
680 rm .tmp_kallsyms* ; /bin/false )
681 endef
682
683 # Update vmlinux version before link
684 # Use + in front of this rule to silent warning about make -j1
685 # First command is ':' to allow us to use + in front of this rule
686 cmd_ksym_ld = $(cmd_vmlinux__)
687 define rule_ksym_ld
688 :
689 +$(call cmd,vmlinux_version)
690 $(call cmd,vmlinux__)
691 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
692 endef
693
694 # Generate .S file with all kernel symbols
695 quiet_cmd_kallsyms = KSYM $@
696 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
697 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
698
699 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
700 $(call if_changed_dep,as_o_S)
701
702 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
703 $(call cmd,kallsyms)
704
705 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
706 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
707 $(call if_changed_rule,ksym_ld)
708
709 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
710 $(call if_changed,vmlinux__)
711
712 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
713 $(call if_changed,vmlinux__)
714
715 # Needs to visit scripts/ before $(KALLSYMS) can be used.
716 $(KALLSYMS): scripts ;
717
718 # Generate some data for debugging strange kallsyms problems
719 debug_kallsyms: .tmp_map$(last_kallsyms)
720
721 .tmp_map%: .tmp_vmlinux% FORCE
722 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
723
724 .tmp_map3: .tmp_map2
725
726 .tmp_map2: .tmp_map1
727
728 endif # ifdef CONFIG_KALLSYMS
729
730 # vmlinux image - including updated kernel symbols
731 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
732 ifdef CONFIG_SAMPLES
733 $(Q)$(MAKE) $(build)=samples
734 endif
735 $(call if_changed_rule,vmlinux__)
736 $(Q)rm -f .old_version
737
738 # The actual objects are generated when descending,
739 # make sure no implicit rule kicks in
740 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
741
742 # Handle descending into subdirectories listed in $(vmlinux-dirs)
743 # Preset locale variables to speed up the build process. Limit locale
744 # tweaks to this spot to avoid wrong language settings when running
745 # make menuconfig etc.
746 # Error messages still appears in the original language
747
748 PHONY += $(vmlinux-dirs)
749 $(vmlinux-dirs): prepare scripts
750 $(Q)$(MAKE) $(build)=$@
751
752 # Build the kernel release string
753 # The KERNELRELEASE is stored in a file named include/config/kernel.release
754 # to be used when executing for example make install or make modules_install
755 #
756 # Take the contents of any files called localversion* and the config
757 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
758 # LOCALVERSION from the command line override all of this
759
760 nullstring :=
761 space := $(nullstring) # end of line
762
763 ___localver = $(objtree)/localversion* $(srctree)/localversion*
764 __localver = $(sort $(wildcard $(___localver)))
765 # skip backup files (containing '~')
766 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
767
768 localver = $(subst $(space),, \
769 $(shell cat /dev/null $(_localver)) \
770 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
771
772 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
773 # and if the SCM is know a tag from the SCM is appended.
774 # The appended tag is determined by the SCM used.
775 #
776 # Currently, only git is supported.
777 # Other SCMs can edit scripts/setlocalversion and add the appropriate
778 # checks as needed.
779 ifdef CONFIG_LOCALVERSION_AUTO
780 _localver-auto = $(shell $(CONFIG_SHELL) \
781 $(srctree)/scripts/setlocalversion $(srctree))
782 localver-auto = $(LOCALVERSION)$(_localver-auto)
783 endif
784
785 localver-full = $(localver)$(localver-auto)
786
787 # Store (new) KERNELRELASE string in include/config/kernel.release
788 kernelrelease = $(KERNELVERSION)$(localver-full)
789 include/config/kernel.release: include/config/auto.conf FORCE
790 $(Q)rm -f $@
791 $(Q)echo $(kernelrelease) > $@
792
793
794 # Things we need to do before we recursively start building the kernel
795 # or the modules are listed in "prepare".
796 # A multi level approach is used. prepareN is processed before prepareN-1.
797 # archprepare is used in arch Makefiles and when processed asm symlink,
798 # version.h and scripts_basic is processed / created.
799
800 # Listed in dependency order
801 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
802
803 # prepare-all is deprecated, use prepare as valid replacement
804 PHONY += prepare-all
805
806 # prepare3 is used to check if we are building in a separate output directory,
807 # and if so do:
808 # 1) Check that make has not been executed in the kernel src $(srctree)
809 # 2) Create the include2 directory, used for the second asm symlink
810 prepare3: include/config/kernel.release
811 ifneq ($(KBUILD_SRC),)
812 @echo ' Using $(srctree) as source for kernel'
813 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
814 echo " $(srctree) is not clean, please run 'make mrproper'";\
815 echo " in the '$(srctree)' directory.";\
816 /bin/false; \
817 fi;
818 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
819 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
820 endif
821
822 # prepare2 creates a makefile if using a separate output directory
823 prepare2: prepare3 outputmakefile
824
825 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
826 include/asm include/config/auto.conf
827 ifneq ($(KBUILD_MODULES),)
828 $(Q)mkdir -p $(MODVERDIR)
829 $(Q)rm -f $(MODVERDIR)/*
830 endif
831
832 archprepare: prepare1 scripts_basic
833
834 prepare0: archprepare FORCE
835 $(Q)$(MAKE) $(build)=.
836
837 # All the preparing..
838 prepare prepare-all: prepare0
839
840 # Leave this as default for preprocessing vmlinux.lds.S, which is now
841 # done in arch/$(ARCH)/kernel/Makefile
842
843 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
844
845 # FIXME: The asm symlink changes when $(ARCH) changes. That's
846 # hard to detect, but I suppose "make mrproper" is a good idea
847 # before switching between archs anyway.
848
849 include/asm:
850 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
851 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
852 @ln -fsn asm-$(ARCH) $@
853
854 # Generate some files
855 # ---------------------------------------------------------------------------
856
857 # KERNELRELEASE can change from a few different places, meaning version.h
858 # needs to be updated, so this check is forced on all builds
859
860 uts_len := 64
861 define filechk_utsrelease.h
862 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
863 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
864 exit 1; \
865 fi; \
866 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
867 endef
868
869 define filechk_version.h
870 (echo \#define LINUX_VERSION_CODE $(shell \
871 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
872 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
873 echo \#define RHEL_MAJOR $(RHEL_MAJOR); \
874 echo \#define RHEL_MINOR $(RHEL_MINOR); \
875 echo \#define RHEL_RELEASE_CODE $(shell \
876 expr $(RHEL_MAJOR) \* 256 + $(RHEL_MINOR)); \
877 echo '#define RHEL_RELEASE_VERSION(a,b) (((a) << 8) + (b))'; )
878 endef
879
880 include/linux/version.h: $(srctree)/Makefile FORCE
881 $(call filechk,version.h)
882
883 include/linux/utsrelease.h: include/config/kernel.release FORCE
884 $(call filechk,utsrelease.h)
885
886 # ---------------------------------------------------------------------------
887
888 PHONY += depend dep
889 depend dep:
890 @echo '*** Warning: make $@ is unnecessary now.'
891
892 # ---------------------------------------------------------------------------
893 # Kernel headers
894 INSTALL_HDR_PATH=$(objtree)/usr
895 export INSTALL_HDR_PATH
896
897 PHONY += headers_install
898 headers_install: include/linux/version.h
899 @if [ ! -r include/asm-$(ARCH)/Kbuild ]; then \
900 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
901 exit 1 ; fi
902 $(Q)unifdef -Ux /dev/null
903 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
904 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
905
906 PHONY += headers_check
907 headers_check: headers_install
908 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
909
910 # ---------------------------------------------------------------------------
911 # Modules
912
913 ifdef CONFIG_MODULES
914
915 # By default, build modules as well
916
917 all: modules
918
919 # Build modules
920
921 PHONY += modules
922 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
923 @echo ' Building modules, stage 2.';
924 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
925
926
927 # Target to prepare building external modules
928 PHONY += modules_prepare
929 modules_prepare: prepare scripts
930
931 # Target to install modules
932 PHONY += modules_install
933 modules_install: _modinst_ _modinst_post
934
935 PHONY += _modinst_
936 _modinst_:
937 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
938 echo "Warning: you may need to install module-init-tools"; \
939 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
940 sleep 1; \
941 fi
942 @rm -rf $(MODLIB)/kernel
943 @rm -f $(MODLIB)/source
944 @mkdir -p $(MODLIB)/kernel
945 @ln -s $(srctree) $(MODLIB)/source
946 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
947 rm -f $(MODLIB)/build ; \
948 ln -s $(objtree) $(MODLIB)/build ; \
949 fi
950 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
951
952 # If System.map exists, run depmod. This deliberately does not have a
953 # dependency on System.map since that would run the dependency tree on
954 # vmlinux. This depmod is only for convenience to give the initial
955 # boot a modules.dep even before / is mounted read-write. However the
956 # boot script depmod is the master version.
957 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
958 depmod_opts :=
959 else
960 depmod_opts := -b $(INSTALL_MOD_PATH) -r
961 endif
962 PHONY += _modinst_post
963 _modinst_post: _modinst_
964 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
965
966 else # CONFIG_MODULES
967
968 # Modules not configured
969 # ---------------------------------------------------------------------------
970
971 modules modules_install: FORCE
972 @echo
973 @echo "The present kernel configuration has modules disabled."
974 @echo "Type 'make config' and enable loadable module support."
975 @echo "Then build a kernel with module support enabled."
976 @echo
977 @exit 1
978
979 endif # CONFIG_MODULES
980
981 ###
982 # Cleaning is done on three levels.
983 # make clean Delete most generated files
984 # Leave enough to build external modules
985 # make mrproper Delete the current configuration, and all generated files
986 # make distclean Remove editor backup files, patch leftover files and the like
987
988 # Directories & files removed with 'make clean'
989 CLEAN_DIRS += $(MODVERDIR)
990 CLEAN_FILES += vmlinux System.map \
991 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
992
993 # Directories & files removed with 'make mrproper'
994 MRPROPER_DIRS += include/config include2 usr/include
995 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
996 include/linux/autoconf.h include/linux/version.h \
997 include/linux/utsrelease.h \
998 Module.symvers tags TAGS cscope*
999
1000 # clean - Delete most, but leave enough to build external modules
1001 #
1002 clean: rm-dirs := $(CLEAN_DIRS)
1003 clean: rm-files := $(CLEAN_FILES)
1004 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1005
1006 PHONY += $(clean-dirs) clean archclean
1007 $(clean-dirs):
1008 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1009
1010 clean: archclean $(clean-dirs)
1011 $(call cmd,rmdirs)
1012 $(call cmd,rmfiles)
1013 @find . $(RCS_FIND_IGNORE) \
1014 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1015 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1016 -o -name '*.symtypes' \) \
1017 -type f -print | xargs rm -f
1018
1019 # mrproper - Delete all generated files, including .config
1020 #
1021 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1022 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1023 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1024
1025 PHONY += $(mrproper-dirs) mrproper archmrproper
1026 $(mrproper-dirs):
1027 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1028
1029 mrproper: clean archmrproper $(mrproper-dirs)
1030 $(call cmd,rmdirs)
1031 $(call cmd,rmfiles)
1032
1033 # distclean
1034 #
1035 PHONY += distclean
1036
1037 distclean: mrproper
1038 @find $(srctree) $(RCS_FIND_IGNORE) \
1039 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1040 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1041 -o -name '.*.rej' -o -size 0 \
1042 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1043 -type f -print | xargs rm -f
1044
1045
1046 # Packaging of the kernel to various formats
1047 # ---------------------------------------------------------------------------
1048 # rpm target kept for backward compatibility
1049 package-dir := $(srctree)/scripts/package
1050
1051 %pkg: include/config/kernel.release FORCE
1052 $(Q)$(MAKE) $(build)=$(package-dir) $@
1053 rpm: include/config/kernel.release FORCE
1054 $(Q)$(MAKE) $(build)=$(package-dir) $@
1055
1056
1057 # Brief documentation of the typical targets used
1058 # ---------------------------------------------------------------------------
1059
1060 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1061 boards := $(notdir $(boards))
1062
1063 help:
1064 @echo 'Cleaning targets:'
1065 @echo ' clean - remove most generated files but keep the config'
1066 @echo ' mrproper - remove all generated files + config + various backup files'
1067 @echo ''
1068 @echo 'Configuration targets:'
1069 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1070 @echo ''
1071 @echo 'Other generic targets:'
1072 @echo ' all - Build all targets marked with [*]'
1073 @echo '* vmlinux - Build the bare kernel'
1074 @echo '* modules - Build all modules'
1075 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1076 @echo ' dir/ - Build all files in dir and below'
1077 @echo ' dir/file.[ois] - Build specified target only'
1078 @echo ' dir/file.ko - Build module including final link'
1079 @echo ' rpm - Build a kernel as an RPM package'
1080 @echo ' tags/TAGS - Generate tags file for editors'
1081 @echo ' cscope - Generate cscope index'
1082 @echo ' kernelrelease - Output the release version string'
1083 @echo ' kernelversion - Output the version stored in Makefile'
1084 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1085 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1086 fi
1087 @echo ' (default: $(INSTALL_HDR_PATH))'
1088 @echo ''
1089 @echo 'Static analysers'
1090 @echo ' checkstack - Generate a list of stack hogs'
1091 @echo ' namespacecheck - Name space analysis on compiled kernel'
1092 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1093 echo ' headers_check - Sanity check on exported headers'; \
1094 fi
1095 @echo ''
1096 @echo 'Kernel packaging:'
1097 @$(MAKE) $(build)=$(package-dir) help
1098 @echo ''
1099 @echo 'Documentation targets:'
1100 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1101 @echo ''
1102 @echo 'Architecture specific targets ($(ARCH)):'
1103 @$(if $(archhelp),$(archhelp),\
1104 echo ' No architecture specific help defined for $(ARCH)')
1105 @echo ''
1106 @$(if $(boards), \
1107 $(foreach b, $(boards), \
1108 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1109 echo '')
1110
1111 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1112 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1113 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1114 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1115 @echo ''
1116 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1117 @echo 'For further info see the ./README file'
1118
1119
1120 # Documentation targets
1121 # ---------------------------------------------------------------------------
1122 %docs: scripts_basic FORCE
1123 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1124
1125 else # KBUILD_EXTMOD
1126
1127 ###
1128 # External module support.
1129 # When building external modules the kernel used as basis is considered
1130 # read-only, and no consistency checks are made and the make
1131 # system is not used on the basis kernel. If updates are required
1132 # in the basis kernel ordinary make commands (without M=...) must
1133 # be used.
1134 #
1135 # The following are the only valid targets when building external
1136 # modules.
1137 # make M=dir clean Delete all automatically generated files
1138 # make M=dir modules Make all modules in specified dir
1139 # make M=dir Same as 'make M=dir modules'
1140 # make M=dir modules_install
1141 # Install the modules built in the module directory
1142 # Assumes install directory is already created
1143
1144 # We are always building modules
1145 KBUILD_MODULES := 1
1146 PHONY += crmodverdir
1147 crmodverdir:
1148 $(Q)mkdir -p $(MODVERDIR)
1149 $(Q)rm -f $(MODVERDIR)/*
1150
1151 PHONY += $(objtree)/Module.symvers
1152 $(objtree)/Module.symvers:
1153 @test -e $(objtree)/Module.symvers || ( \
1154 echo; \
1155 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1156 echo " is missing; modules will have no dependencies and modversions."; \
1157 echo )
1158
1159 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1160 PHONY += $(module-dirs) modules
1161 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1162 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1163
1164 modules: $(module-dirs)
1165 @echo ' Building modules, stage 2.';
1166 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1167
1168 PHONY += modules_install
1169 modules_install: _emodinst_ _emodinst_post
1170
1171 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1172 PHONY += _emodinst_
1173 _emodinst_:
1174 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1175 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1176
1177 # Run depmod only is we have System.map and depmod is executable
1178 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1179 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1180 $(DEPMOD) -ae -F System.map \
1181 $(if $(strip $(INSTALL_MOD_PATH)), \
1182 -b $(INSTALL_MOD_PATH) -r) \
1183 $(KERNELRELEASE); \
1184 fi
1185
1186 PHONY += _emodinst_post
1187 _emodinst_post: _emodinst_
1188 $(call cmd,depmod)
1189
1190 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1191
1192 PHONY += $(clean-dirs) clean
1193 $(clean-dirs):
1194 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1195
1196 clean: rm-dirs := $(MODVERDIR)
1197 clean: $(clean-dirs)
1198 $(call cmd,rmdirs)
1199 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1200 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1201 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1202 -type f -print | xargs rm -f
1203
1204 help:
1205 @echo ' Building external modules.'
1206 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1207 @echo ''
1208 @echo ' modules - default target, build the module(s)'
1209 @echo ' modules_install - install the module'
1210 @echo ' clean - remove generated files in module directory only'
1211 @echo ''
1212
1213 # Dummies...
1214 PHONY += prepare scripts
1215 prepare: ;
1216 scripts: ;
1217 endif # KBUILD_EXTMOD
1218
1219 # Generate tags for editors
1220 # ---------------------------------------------------------------------------
1221
1222 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1223 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1224 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1225
1226 ifeq ($(src),$(obj))
1227 __srctree =
1228 else
1229 __srctree = $(srctree)/
1230 endif
1231
1232 ifeq ($(ALLSOURCE_ARCHS),)
1233 ifeq ($(ARCH),um)
1234 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1235 else
1236 ALLINCLUDE_ARCHS := $(ARCH)
1237 endif
1238 else
1239 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1240 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1241 endif
1242
1243 ALLSOURCE_ARCHS := $(ARCH)
1244
1245 define find-sources
1246 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1247 \( -name include -o -name arch \) -prune -o \
1248 -name $1 -print; \
1249 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1250 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1251 -name $1 -print; \
1252 done ; \
1253 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1254 -name $1 -print; \
1255 find $(__srctree)include $(RCS_FIND_IGNORE) \
1256 \( -name config -o -name 'asm-*' \) -prune \
1257 -o -name $1 -print; \
1258 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1259 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1260 -name $1 -print; \
1261 done ; \
1262 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1263 -name $1 -print )
1264 endef
1265
1266 define all-sources
1267 $(call find-sources,'*.[chS]')
1268 endef
1269 define all-kconfigs
1270 $(call find-sources,'Kconfig*')
1271 endef
1272 define all-defconfigs
1273 $(call find-sources,'defconfig')
1274 endef
1275
1276 quiet_cmd_cscope-file = FILELST cscope.files
1277 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1278
1279 quiet_cmd_cscope = MAKE cscope.out
1280 cmd_cscope = cscope -b
1281
1282 cscope: FORCE
1283 $(call cmd,cscope-file)
1284 $(call cmd,cscope)
1285
1286 quiet_cmd_TAGS = MAKE $@
1287 define cmd_TAGS
1288 rm -f $@; \
1289 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1290 echo "-I __initdata,__exitdata,__acquires,__releases \
1291 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1292 --extra=+f --c-kinds=+px"`; \
1293 $(all-sources) | xargs etags $$ETAGSF -a; \
1294 if test "x$$ETAGSF" = x; then \
1295 $(all-kconfigs) | xargs etags -a \
1296 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1297 $(all-defconfigs) | xargs etags -a \
1298 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1299 fi
1300 endef
1301
1302 TAGS: FORCE
1303 $(call cmd,TAGS)
1304
1305
1306 quiet_cmd_tags = MAKE $@
1307 define cmd_tags
1308 rm -f $@; \
1309 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1310 echo "-I __initdata,__exitdata,__acquires,__releases \
1311 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1312 --extra=+f --c-kinds=+px"`; \
1313 $(all-sources) | xargs ctags $$CTAGSF -a
1314 endef
1315
1316 tags: FORCE
1317 $(call cmd,tags)
1318
1319
1320 # Scripts to check various things for consistency
1321 # ---------------------------------------------------------------------------
1322
1323 includecheck:
1324 find * $(RCS_FIND_IGNORE) \
1325 -name '*.[hcS]' -type f -print | sort \
1326 | xargs $(PERL) -w scripts/checkincludes.pl
1327
1328 versioncheck:
1329 find * $(RCS_FIND_IGNORE) \
1330 -name '*.[hcS]' -type f -print | sort \
1331 | xargs $(PERL) -w scripts/checkversion.pl
1332
1333 namespacecheck:
1334 $(PERL) $(srctree)/scripts/namespace.pl
1335
1336 endif #ifeq ($(config-targets),1)
1337 endif #ifeq ($(mixed-targets),1)
1338
1339 PHONY += checkstack kernelrelease kernelversion
1340 checkstack:
1341 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1342 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1343
1344 kernelrelease:
1345 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1346 $(error kernelrelease not valid - run 'make prepare' to update it))
1347 kernelversion:
1348 @echo $(KERNELVERSION)
1349
1350 # Single targets
1351 # ---------------------------------------------------------------------------
1352 # Single targets are compatible with:
1353 # - build whith mixed source and output
1354 # - build with separate output dir 'make O=...'
1355 # - external modules
1356 #
1357 # target-dir => where to store outputfile
1358 # build-dir => directory in kernel source tree to use
1359
1360 ifeq ($(KBUILD_EXTMOD),)
1361 build-dir = $(patsubst %/,%,$(dir $@))
1362 target-dir = $(dir $@)
1363 else
1364 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1365 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1366 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1367 endif
1368
1369 %.s: %.c prepare scripts FORCE
1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1371 %.i: %.c prepare scripts FORCE
1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1373 %.o: %.c prepare scripts FORCE
1374 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1375 %.lst: %.c prepare scripts FORCE
1376 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1377 %.s: %.S prepare scripts FORCE
1378 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1379 %.o: %.S prepare scripts FORCE
1380 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1381 %.symtypes: %.c prepare scripts FORCE
1382 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1383
1384 # Modules
1385 / %/: prepare scripts FORCE
1386 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1387 $(build)=$(build-dir)
1388 %.ko: prepare scripts FORCE
1389 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1390 $(build)=$(build-dir) $(@:.ko=.o)
1391 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1392
1393 # FIXME Should go into a make.lib or something
1394 # ===========================================================================
1395
1396 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1397 cmd_rmdirs = rm -rf $(rm-dirs)
1398
1399 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1400 cmd_rmfiles = rm -f $(rm-files)
1401
1402
1403 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1404 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1405 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1406
1407 quiet_cmd_as_o_S = AS $@
1408 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1409
1410 # read all saved command lines
1411
1412 targets := $(wildcard $(sort $(targets)))
1413 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1414
1415 ifneq ($(cmd_files),)
1416 $(cmd_files): ; # Do not try to update included dependency files
1417 include $(cmd_files)
1418 endif
1419
1420 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1421 # Usage:
1422 # $(Q)$(MAKE) $(clean)=dir
1423 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1424
1425 endif # skip-makefile
1426
1427 PHONY += FORCE
1428 FORCE:
1429
1430
1431 # Declare the contents of the .PHONY variable as phony. We keep that
1432 # information in a variable se we can use it in if_changed and friends.
1433 .PHONY: $(PHONY)
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