Annotation of /trunk/mkinitrd-magellan/busybox/Makefile
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Revision 532 -
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File size: 41165 byte(s)
Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File size: 41165 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
| 1 | niro | 532 | VERSION = 1 |
| 2 | PATCHLEVEL = 4 | ||
| 3 | SUBLEVEL = 2 | ||
| 4 | EXTRAVERSION = | ||
| 5 | NAME = Unnamed | ||
| 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 print "Entering directory ..." | ||
| 14 | MAKEFLAGS += --no-print-directory | ||
| 15 | |||
| 16 | # We are using a recursive build, so we need to do a little thinking | ||
| 17 | # to get the ordering right. | ||
| 18 | # | ||
| 19 | # Most importantly: sub-Makefiles should only ever modify files in | ||
| 20 | # their own directory. If in some directory we have a dependency on | ||
| 21 | # a file in another dir (which doesn't happen often, but it's often | ||
| 22 | # unavoidable when linking the built-in.o targets which finally | ||
| 23 | # turn into busybox), we will call a sub make in that other dir, and | ||
| 24 | # after that we are sure that everything which is in that other dir | ||
| 25 | # is now up to date. | ||
| 26 | # | ||
| 27 | # The only cases where we need to modify files which have global | ||
| 28 | # effects are thus separated out and done before the recursive | ||
| 29 | # descending is started. They are now explicitly listed as the | ||
| 30 | # prepare rule. | ||
| 31 | |||
| 32 | # To put more focus on warnings, be less verbose as default | ||
| 33 | # Use 'make V=1' to see the full commands | ||
| 34 | |||
| 35 | ifdef V | ||
| 36 | ifeq ("$(origin V)", "command line") | ||
| 37 | KBUILD_VERBOSE = $(V) | ||
| 38 | endif | ||
| 39 | endif | ||
| 40 | ifndef KBUILD_VERBOSE | ||
| 41 | KBUILD_VERBOSE = 0 | ||
| 42 | endif | ||
| 43 | |||
| 44 | # Call sparse as part of compilation of C files | ||
| 45 | # Use 'make C=1' to enable sparse checking | ||
| 46 | |||
| 47 | ifdef C | ||
| 48 | ifeq ("$(origin C)", "command line") | ||
| 49 | KBUILD_CHECKSRC = $(C) | ||
| 50 | endif | ||
| 51 | endif | ||
| 52 | ifndef KBUILD_CHECKSRC | ||
| 53 | KBUILD_CHECKSRC = 0 | ||
| 54 | endif | ||
| 55 | |||
| 56 | # Use make M=dir to specify directory of external module to build | ||
| 57 | # Old syntax make ... SUBDIRS=$PWD is still supported | ||
| 58 | # Setting the environment variable KBUILD_EXTMOD take precedence | ||
| 59 | ifdef SUBDIRS | ||
| 60 | KBUILD_EXTMOD ?= $(SUBDIRS) | ||
| 61 | endif | ||
| 62 | ifdef M | ||
| 63 | ifeq ("$(origin M)", "command line") | ||
| 64 | KBUILD_EXTMOD := $(M) | ||
| 65 | endif | ||
| 66 | endif | ||
| 67 | |||
| 68 | |||
| 69 | # kbuild supports saving output files in a separate directory. | ||
| 70 | # To locate output files in a separate directory two syntaxes are supported. | ||
| 71 | # In both cases the working directory must be the root of the kernel src. | ||
| 72 | # 1) O= | ||
| 73 | # Use "make O=dir/to/store/output/files/" | ||
| 74 | # | ||
| 75 | # 2) Set KBUILD_OUTPUT | ||
| 76 | # Set the environment variable KBUILD_OUTPUT to point to the directory | ||
| 77 | # where the output files shall be placed. | ||
| 78 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | ||
| 79 | # make | ||
| 80 | # | ||
| 81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | ||
| 82 | # variable. | ||
| 83 | |||
| 84 | |||
| 85 | # KBUILD_SRC is set on invocation of make in OBJ directory | ||
| 86 | # KBUILD_SRC is not intended to be used by the regular user (for now) | ||
| 87 | ifeq ($(KBUILD_SRC),) | ||
| 88 | |||
| 89 | # OK, Make called in directory where kernel src resides | ||
| 90 | # Do we want to locate output files in a separate directory? | ||
| 91 | ifdef O | ||
| 92 | ifeq ("$(origin O)", "command line") | ||
| 93 | KBUILD_OUTPUT := $(O) | ||
| 94 | endif | ||
| 95 | endif | ||
| 96 | |||
| 97 | # That's our default target when none is given on the command line | ||
| 98 | PHONY := _all | ||
| 99 | _all: | ||
| 100 | |||
| 101 | ifneq ($(KBUILD_OUTPUT),) | ||
| 102 | # Invoke a second make in the output directory, passing relevant variables | ||
| 103 | # check that the output directory actually exists | ||
| 104 | saved-output := $(KBUILD_OUTPUT) | ||
| 105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | ||
| 106 | $(if $(KBUILD_OUTPUT),, \ | ||
| 107 | $(error output directory "$(saved-output)" does not exist)) | ||
| 108 | |||
| 109 | PHONY += $(MAKECMDGOALS) | ||
| 110 | |||
| 111 | $(filter-out _all,$(MAKECMDGOALS)) _all: | ||
| 112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ | ||
| 113 | KBUILD_SRC=$(CURDIR) \ | ||
| 114 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ | ||
| 115 | |||
| 116 | # Leave processing to above invocation of make | ||
| 117 | skip-makefile := 1 | ||
| 118 | endif # ifneq ($(KBUILD_OUTPUT),) | ||
| 119 | endif # ifeq ($(KBUILD_SRC),) | ||
| 120 | |||
| 121 | # We process the rest of the Makefile if this is the final invocation of make | ||
| 122 | ifeq ($(skip-makefile),) | ||
| 123 | |||
| 124 | # If building an external module we do not care about the all: rule | ||
| 125 | # but instead _all depend on modules | ||
| 126 | PHONY += all | ||
| 127 | ifeq ($(KBUILD_EXTMOD),) | ||
| 128 | _all: all | ||
| 129 | else | ||
| 130 | _all: modules | ||
| 131 | endif | ||
| 132 | |||
| 133 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | ||
| 134 | TOPDIR := $(srctree) | ||
| 135 | # FIXME - TOPDIR is obsolete, use srctree/objtree | ||
| 136 | objtree := $(CURDIR) | ||
| 137 | src := $(srctree) | ||
| 138 | obj := $(objtree) | ||
| 139 | |||
| 140 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) | ||
| 141 | |||
| 142 | export srctree objtree VPATH TOPDIR | ||
| 143 | |||
| 144 | |||
| 145 | # SUBARCH tells the usermode build what the underlying arch is. That is set | ||
| 146 | # first, and if a usermode build is happening, the "ARCH=um" on the command | ||
| 147 | # line overrides the setting of ARCH below. If a native build is happening, | ||
| 148 | # then ARCH is assigned, getting whatever value it gets normally, and | ||
| 149 | # SUBARCH is subsequently ignored. | ||
| 150 | |||
| 151 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | ||
| 152 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | ||
| 153 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ | ||
| 154 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) | ||
| 155 | |||
| 156 | # Cross compiling and selecting different set of gcc/bin-utils | ||
| 157 | # --------------------------------------------------------------------------- | ||
| 158 | # | ||
| 159 | # When performing cross compilation for other architectures ARCH shall be set | ||
| 160 | # to the target architecture. (See arch/* for the possibilities). | ||
| 161 | # ARCH can be set during invocation of make: | ||
| 162 | # make ARCH=ia64 | ||
| 163 | # Another way is to have ARCH set in the environment. | ||
| 164 | # The default ARCH is the host where make is executed. | ||
| 165 | |||
| 166 | # CROSS_COMPILE specify the prefix used for all executables used | ||
| 167 | # during compilation. Only gcc and related bin-utils executables | ||
| 168 | # are prefixed with $(CROSS_COMPILE). | ||
| 169 | # CROSS_COMPILE can be set on the command line | ||
| 170 | # make CROSS_COMPILE=ia64-linux- | ||
| 171 | # Alternatively CROSS_COMPILE can be set in the environment. | ||
| 172 | # Default value for CROSS_COMPILE is not to prefix executables | ||
| 173 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | ||
| 174 | |||
| 175 | ARCH ?= $(SUBARCH) | ||
| 176 | CROSS_COMPILE ?= | ||
| 177 | |||
| 178 | # Architecture as present in compile.h | ||
| 179 | UTS_MACHINE := $(ARCH) | ||
| 180 | |||
| 181 | # SHELL used by kbuild | ||
| 182 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | ||
| 183 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | ||
| 184 | else echo sh; fi ; fi) | ||
| 185 | |||
| 186 | HOSTCC = gcc | ||
| 187 | HOSTCXX = g++ | ||
| 188 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | ||
| 189 | HOSTCXXFLAGS = -O2 | ||
| 190 | |||
| 191 | # Decide whether to build built-in, modular, or both. | ||
| 192 | # Normally, just do built-in. | ||
| 193 | |||
| 194 | KBUILD_MODULES := | ||
| 195 | KBUILD_BUILTIN := 1 | ||
| 196 | |||
| 197 | # If we have only "make modules", don't compile built-in objects. | ||
| 198 | # When we're building modules with modversions, we need to consider | ||
| 199 | # the built-in objects during the descend as well, in order to | ||
| 200 | # make sure the checksums are uptodate before we record them. | ||
| 201 | |||
| 202 | ifeq ($(MAKECMDGOALS),modules) | ||
| 203 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | ||
| 204 | endif | ||
| 205 | |||
| 206 | # If we have "make <whatever> modules", compile modules | ||
| 207 | # in addition to whatever we do anyway. | ||
| 208 | # Just "make" or "make all" shall build modules as well | ||
| 209 | |||
| 210 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | ||
| 211 | KBUILD_MODULES := 1 | ||
| 212 | endif | ||
| 213 | |||
| 214 | ifeq ($(MAKECMDGOALS),) | ||
| 215 | KBUILD_MODULES := 1 | ||
| 216 | endif | ||
| 217 | |||
| 218 | export KBUILD_MODULES KBUILD_BUILTIN | ||
| 219 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | ||
| 220 | |||
| 221 | # Beautify output | ||
| 222 | # --------------------------------------------------------------------------- | ||
| 223 | # | ||
| 224 | # Normally, we echo the whole command before executing it. By making | ||
| 225 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | ||
| 226 | # $(quiet) to choose other forms of output instead, e.g. | ||
| 227 | # | ||
| 228 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | ||
| 229 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | ||
| 230 | # | ||
| 231 | # If $(quiet) is empty, the whole command will be printed. | ||
| 232 | # If it is set to "quiet_", only the short version will be printed. | ||
| 233 | # If it is set to "silent_", nothing wil be printed at all, since | ||
| 234 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | ||
| 235 | # | ||
| 236 | # A simple variant is to prefix commands with $(Q) - that's useful | ||
| 237 | # for commands that shall be hidden in non-verbose mode. | ||
| 238 | # | ||
| 239 | # $(Q)ln $@ :< | ||
| 240 | # | ||
| 241 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | ||
| 242 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | ||
| 243 | |||
| 244 | ifeq ($(KBUILD_VERBOSE),1) | ||
| 245 | quiet = | ||
| 246 | Q = | ||
| 247 | else | ||
| 248 | quiet=quiet_ | ||
| 249 | Q = @ | ||
| 250 | endif | ||
| 251 | |||
| 252 | # If the user is running make -s (silent mode), suppress echoing of | ||
| 253 | # commands | ||
| 254 | |||
| 255 | ifneq ($(findstring s,$(MAKEFLAGS)),) | ||
| 256 | quiet=silent_ | ||
| 257 | endif | ||
| 258 | |||
| 259 | export quiet Q KBUILD_VERBOSE | ||
| 260 | |||
| 261 | |||
| 262 | # Look for make include files relative to root of kernel src | ||
| 263 | MAKEFLAGS += --include-dir=$(srctree) | ||
| 264 | |||
| 265 | # We need some generic definitions | ||
| 266 | include $(srctree)/scripts/Kbuild.include | ||
| 267 | |||
| 268 | # For maximum performance (+ possibly random breakage, uncomment | ||
| 269 | # the following) | ||
| 270 | |||
| 271 | MAKEFLAGS += -rR | ||
| 272 | |||
| 273 | # Make variables (CC, etc...) | ||
| 274 | |||
| 275 | AS = $(CROSS_COMPILE)as | ||
| 276 | CC = $(CROSS_COMPILE)gcc | ||
| 277 | LD = $(CC) -nostdlib | ||
| 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 | CFLAGS := | ||
| 303 | CPPFLAGS := | ||
| 304 | AFLAGS := | ||
| 305 | |||
| 306 | # Read KERNELRELEASE from .kernelrelease (if it exists) | ||
| 307 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) | ||
| 308 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) | ||
| 309 | |||
| 310 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ | ||
| 311 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ | ||
| 312 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ | ||
| 313 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | ||
| 314 | |||
| 315 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | ||
| 316 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | ||
| 317 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | ||
| 318 | |||
| 319 | # When compiling out-of-tree modules, put MODVERDIR in the module | ||
| 320 | # tree rather than in the kernel tree. The kernel tree might | ||
| 321 | # even be read-only. | ||
| 322 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | ||
| 323 | |||
| 324 | # Files to ignore in find ... statements | ||
| 325 | |||
| 326 | 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 | ||
| 327 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | ||
| 328 | |||
| 329 | # =========================================================================== | ||
| 330 | # Rules shared between *config targets and build targets | ||
| 331 | |||
| 332 | # Basic helpers built in scripts/ | ||
| 333 | PHONY += scripts_basic | ||
| 334 | scripts_basic: | ||
| 335 | $(Q)$(MAKE) $(build)=scripts/basic | ||
| 336 | |||
| 337 | # To avoid any implicit rule to kick in, define an empty command. | ||
| 338 | scripts/basic/%: scripts_basic ; | ||
| 339 | |||
| 340 | PHONY += outputmakefile | ||
| 341 | # outputmakefile generates a Makefile in the output directory, if using a | ||
| 342 | # separate output directory. This allows convenient use of make in the | ||
| 343 | # output directory. | ||
| 344 | outputmakefile: | ||
| 345 | ifneq ($(KBUILD_SRC),) | ||
| 346 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | ||
| 347 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | ||
| 348 | endif | ||
| 349 | |||
| 350 | # To make sure we do not include .config for any of the *config targets | ||
| 351 | # catch them early, and hand them over to scripts/kconfig/Makefile | ||
| 352 | # It is allowed to specify more targets when calling make, including | ||
| 353 | # mixing *config targets and build targets. | ||
| 354 | # For example 'make oldconfig all'. | ||
| 355 | # Detect when mixed targets is specified, and make a second invocation | ||
| 356 | # of make so .config is not included in this case either (for *config). | ||
| 357 | |||
| 358 | no-dot-config-targets := clean mrproper distclean \ | ||
| 359 | cscope TAGS tags help %docs check% | ||
| 360 | |||
| 361 | config-targets := 0 | ||
| 362 | mixed-targets := 0 | ||
| 363 | dot-config := 1 | ||
| 364 | |||
| 365 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
| 366 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
| 367 | dot-config := 0 | ||
| 368 | endif | ||
| 369 | endif | ||
| 370 | |||
| 371 | ifeq ($(KBUILD_EXTMOD),) | ||
| 372 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | ||
| 373 | config-targets := 1 | ||
| 374 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | ||
| 375 | mixed-targets := 1 | ||
| 376 | endif | ||
| 377 | endif | ||
| 378 | endif | ||
| 379 | |||
| 380 | ifeq ($(mixed-targets),1) | ||
| 381 | # =========================================================================== | ||
| 382 | # We're called with mixed targets (*config and build targets). | ||
| 383 | # Handle them one by one. | ||
| 384 | |||
| 385 | %:: FORCE | ||
| 386 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | ||
| 387 | |||
| 388 | else | ||
| 389 | ifeq ($(config-targets),1) | ||
| 390 | # =========================================================================== | ||
| 391 | # *config targets only - make sure prerequisites are updated, and descend | ||
| 392 | # in scripts/kconfig to make the *config target | ||
| 393 | |||
| 394 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | ||
| 395 | # KBUILD_DEFCONFIG may point out an alternative default configuration | ||
| 396 | # used for 'make defconfig' | ||
| 397 | -include $(srctree)/arch/$(ARCH)/Makefile | ||
| 398 | export KBUILD_DEFCONFIG | ||
| 399 | |||
| 400 | config %config: scripts_basic outputmakefile FORCE | ||
| 401 | $(Q)mkdir -p include | ||
| 402 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | ||
| 403 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease | ||
| 404 | |||
| 405 | else | ||
| 406 | # =========================================================================== | ||
| 407 | # Build targets only - this includes busybox, arch specific targets, clean | ||
| 408 | # targets and others. In general all targets except *config targets. | ||
| 409 | |||
| 410 | ifeq ($(KBUILD_EXTMOD),) | ||
| 411 | # Additional helpers built in scripts/ | ||
| 412 | # Carefully list dependencies so we do not try to build scripts twice | ||
| 413 | # in parrallel | ||
| 414 | PHONY += scripts | ||
| 415 | scripts: scripts_basic include/config/MARKER | ||
| 416 | $(Q)$(MAKE) $(build)=$(@) | ||
| 417 | |||
| 418 | scripts_basic: include/autoconf.h | ||
| 419 | |||
| 420 | # Objects we will link into busybox / subdirs we need to visit | ||
| 421 | core-y := \ | ||
| 422 | applets/ \ | ||
| 423 | |||
| 424 | libs-y := \ | ||
| 425 | archival/ \ | ||
| 426 | archival/libunarchive/ \ | ||
| 427 | console-tools/ \ | ||
| 428 | coreutils/ \ | ||
| 429 | coreutils/libcoreutils/ \ | ||
| 430 | debianutils/ \ | ||
| 431 | e2fsprogs/ \ | ||
| 432 | editors/ \ | ||
| 433 | findutils/ \ | ||
| 434 | init/ \ | ||
| 435 | libbb/ \ | ||
| 436 | libpwdgrp/ \ | ||
| 437 | loginutils/ \ | ||
| 438 | miscutils/ \ | ||
| 439 | modutils/ \ | ||
| 440 | networking/ \ | ||
| 441 | networking/libiproute/ \ | ||
| 442 | networking/udhcp/ \ | ||
| 443 | procps/ \ | ||
| 444 | runit/ \ | ||
| 445 | shell/ \ | ||
| 446 | sysklogd/ \ | ||
| 447 | util-linux/ \ | ||
| 448 | |||
| 449 | endif # KBUILD_EXTMOD | ||
| 450 | |||
| 451 | ifeq ($(dot-config),1) | ||
| 452 | # In this section, we need .config | ||
| 453 | |||
| 454 | # Read in dependencies to all Kconfig* files, make sure to run | ||
| 455 | # oldconfig if changes are detected. | ||
| 456 | -include .kconfig.d | ||
| 457 | |||
| 458 | -include .config | ||
| 459 | |||
| 460 | # If .config needs to be updated, it will be done via the dependency | ||
| 461 | # that autoconf has on .config. | ||
| 462 | # To avoid any implicit rule to kick in, define an empty command | ||
| 463 | .config .kconfig.d: ; | ||
| 464 | |||
| 465 | # Now we can define CFLAGS etc according to .config | ||
| 466 | include $(srctree)/Makefile.flags | ||
| 467 | |||
| 468 | # If .config is newer than include/autoconf.h, someone tinkered | ||
| 469 | # with it and forgot to run make oldconfig. | ||
| 470 | # If kconfig.d is missing then we are probarly in a cleaned tree so | ||
| 471 | # we execute the config step to be sure to catch updated Kconfig files | ||
| 472 | include/autoconf.h: .kconfig.d .config | ||
| 473 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | ||
| 474 | |||
| 475 | else | ||
| 476 | # Dummy target needed, because used as prerequisite | ||
| 477 | include/autoconf.h: ; | ||
| 478 | endif | ||
| 479 | |||
| 480 | # The all: target is the default when no target is given on the | ||
| 481 | # command line. | ||
| 482 | # This allow a user to issue only 'make' to build a kernel including modules | ||
| 483 | # Defaults busybox but it is usually overriden in the arch makefile | ||
| 484 | all: busybox | ||
| 485 | |||
| 486 | -include $(srctree)/arch/$(ARCH)/Makefile | ||
| 487 | |||
| 488 | # arch Makefile may override CC so keep this after arch Makefile is included | ||
| 489 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | ||
| 490 | CHECKFLAGS += $(NOSTDINC_FLAGS) | ||
| 491 | |||
| 492 | # warn about C99 declaration after statement | ||
| 493 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | ||
| 494 | |||
| 495 | # disable pointer signedness warnings in gcc 4.0 | ||
| 496 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) | ||
| 497 | |||
| 498 | # Default kernel image to build when no specific target is given. | ||
| 499 | # KBUILD_IMAGE may be overruled on the commandline or | ||
| 500 | # set in the environment | ||
| 501 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | ||
| 502 | # this default value | ||
| 503 | export KBUILD_IMAGE ?= busybox | ||
| 504 | |||
| 505 | # | ||
| 506 | # INSTALL_PATH specifies where to place the updated kernel and system map | ||
| 507 | # images. Default is /boot, but you can set it to other values | ||
| 508 | export INSTALL_PATH ?= /boot | ||
| 509 | |||
| 510 | # | ||
| 511 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | ||
| 512 | # relocations required by build roots. This is not defined in the | ||
| 513 | # makefile but the arguement can be passed to make if needed. | ||
| 514 | # | ||
| 515 | |||
| 516 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | ||
| 517 | export MODLIB | ||
| 518 | |||
| 519 | |||
| 520 | ifeq ($(KBUILD_EXTMOD),) | ||
| 521 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) | ||
| 522 | |||
| 523 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ | ||
| 524 | $(core-n) $(core-) $(libs-n) $(libs-) \ | ||
| 525 | ))) | ||
| 526 | |||
| 527 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | ||
| 528 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | ||
| 529 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | ||
| 530 | libs-y := $(libs-y1) $(libs-y2) | ||
| 531 | |||
| 532 | # Build busybox | ||
| 533 | # --------------------------------------------------------------------------- | ||
| 534 | # busybox is build from the objects selected by $(busybox-init) and | ||
| 535 | # $(busybox-main). Most are built-in.o files from top-level directories | ||
| 536 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. | ||
| 537 | # Ordering when linking is important, and $(busybox-init) must be first. | ||
| 538 | # | ||
| 539 | # busybox | ||
| 540 | # ^ | ||
| 541 | # | | ||
| 542 | # +-< $(busybox-init) | ||
| 543 | # | +--< init/version.o + more | ||
| 544 | # | | ||
| 545 | # +--< $(busybox-main) | ||
| 546 | # | +--< driver/built-in.o mm/built-in.o + more | ||
| 547 | # | | ||
| 548 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | ||
| 549 | # | ||
| 550 | # busybox version (uname -v) cannot be updated during normal | ||
| 551 | # descending-into-subdirs phase since we do not yet know if we need to | ||
| 552 | # update busybox. | ||
| 553 | # Therefore this step is delayed until just before final link of busybox - | ||
| 554 | # except in the kallsyms case where it is done just before adding the | ||
| 555 | # symbols to the kernel. | ||
| 556 | # | ||
| 557 | # System.map is generated to document addresses of all kernel symbols | ||
| 558 | |||
| 559 | busybox-all := $(core-y) $(libs-y) | ||
| 560 | |||
| 561 | # Rule to link busybox - also used during CONFIG_KALLSYMS | ||
| 562 | # May be overridden by arch/$(ARCH)/Makefile | ||
| 563 | quiet_cmd_busybox__ ?= LINK $@ | ||
| 564 | cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \ | ||
| 565 | -o $@ \ | ||
| 566 | -Wl,--warn-common -Wl,--sort-common \ | ||
| 567 | -Wl,--start-group $(busybox-all) -Wl,--end-group | ||
| 568 | |||
| 569 | # Generate System.map | ||
| 570 | quiet_cmd_sysmap = SYSMAP | ||
| 571 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap | ||
| 572 | |||
| 573 | # Link of busybox | ||
| 574 | # If CONFIG_KALLSYMS is set .version is already updated | ||
| 575 | # Generate System.map and verify that the content is consistent | ||
| 576 | # Use + in front of the busybox_version rule to silent warning with make -j2 | ||
| 577 | # First command is ':' to allow us to use + in front of the rule | ||
| 578 | define rule_busybox__ | ||
| 579 | : | ||
| 580 | $(call cmd,busybox__) | ||
| 581 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd | ||
| 582 | endef | ||
| 583 | |||
| 584 | |||
| 585 | ifdef CONFIG_KALLSYMS | ||
| 586 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) | ||
| 587 | # It's a three stage process: | ||
| 588 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is | ||
| 589 | # empty | ||
| 590 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | ||
| 591 | # the right size - busybox version (uname -v) is updated during this step | ||
| 592 | # o .tmp_busybox2 now has a __kallsyms section of the right size, | ||
| 593 | # but due to the added section, some addresses have shifted. | ||
| 594 | # From here, we generate a correct .tmp_kallsyms2.o | ||
| 595 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. | ||
| 596 | # o Verify that the System.map from busybox matches the map from | ||
| 597 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. | ||
| 598 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | ||
| 599 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a | ||
| 600 | # temporary bypass to allow the kernel to be built while the | ||
| 601 | # maintainers work out what went wrong with kallsyms. | ||
| 602 | |||
| 603 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | ||
| 604 | last_kallsyms := 3 | ||
| 605 | else | ||
| 606 | last_kallsyms := 2 | ||
| 607 | endif | ||
| 608 | |||
| 609 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | ||
| 610 | |||
| 611 | define verify_kallsyms | ||
| 612 | $(Q)$(if $($(quiet)cmd_sysmap), \ | ||
| 613 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | ||
| 614 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map | ||
| 615 | $(Q)cmp -s System.map .tmp_System.map || \ | ||
| 616 | (echo Inconsistent kallsyms data; \ | ||
| 617 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | ||
| 618 | rm .tmp_kallsyms* ; /bin/false ) | ||
| 619 | endef | ||
| 620 | |||
| 621 | # Update busybox version before link | ||
| 622 | # Use + in front of this rule to silent warning about make -j1 | ||
| 623 | # First command is ':' to allow us to use + in front of this rule | ||
| 624 | cmd_ksym_ld = $(cmd_busybox__) | ||
| 625 | define rule_ksym_ld | ||
| 626 | : | ||
| 627 | +$(call cmd,busybox_version) | ||
| 628 | $(call cmd,busybox__) | ||
| 629 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd | ||
| 630 | endef | ||
| 631 | |||
| 632 | # Generate .S file with all kernel symbols | ||
| 633 | quiet_cmd_kallsyms = KSYM $@ | ||
| 634 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | ||
| 635 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | ||
| 636 | |||
| 637 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | ||
| 638 | $(call if_changed_dep,as_o_S) | ||
| 639 | |||
| 640 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) | ||
| 641 | $(call cmd,kallsyms) | ||
| 642 | |||
| 643 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version | ||
| 644 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE | ||
| 645 | $(call if_changed_rule,ksym_ld) | ||
| 646 | |||
| 647 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE | ||
| 648 | $(call if_changed,busybox__) | ||
| 649 | |||
| 650 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE | ||
| 651 | $(call if_changed,busybox__) | ||
| 652 | |||
| 653 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | ||
| 654 | $(KALLSYMS): scripts ; | ||
| 655 | |||
| 656 | # Generate some data for debugging strange kallsyms problems | ||
| 657 | debug_kallsyms: .tmp_map$(last_kallsyms) | ||
| 658 | |||
| 659 | .tmp_map%: .tmp_busybox% FORCE | ||
| 660 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | ||
| 661 | |||
| 662 | .tmp_map3: .tmp_map2 | ||
| 663 | |||
| 664 | .tmp_map2: .tmp_map1 | ||
| 665 | |||
| 666 | endif # ifdef CONFIG_KALLSYMS | ||
| 667 | |||
| 668 | # busybox image - including updated kernel symbols | ||
| 669 | busybox_unstripped: $(busybox-all) FORCE | ||
| 670 | $(call if_changed_rule,busybox__) | ||
| 671 | $(Q)rm -f .old_version | ||
| 672 | |||
| 673 | busybox: busybox_unstripped | ||
| 674 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ | ||
| 675 | busybox_unstripped -o $@ | ||
| 676 | |||
| 677 | # The actual objects are generated when descending, | ||
| 678 | # make sure no implicit rule kicks in | ||
| 679 | $(sort $(busybox-all)): $(busybox-dirs) ; | ||
| 680 | |||
| 681 | # Handle descending into subdirectories listed in $(busybox-dirs) | ||
| 682 | # Preset locale variables to speed up the build process. Limit locale | ||
| 683 | # tweaks to this spot to avoid wrong language settings when running | ||
| 684 | # make menuconfig etc. | ||
| 685 | # Error messages still appears in the original language | ||
| 686 | |||
| 687 | PHONY += $(busybox-dirs) | ||
| 688 | $(busybox-dirs): prepare scripts | ||
| 689 | $(Q)$(MAKE) $(build)=$@ | ||
| 690 | |||
| 691 | # Build the kernel release string | ||
| 692 | # The KERNELRELEASE is stored in a file named .kernelrelease | ||
| 693 | # to be used when executing for example make install or make modules_install | ||
| 694 | # | ||
| 695 | # Take the contents of any files called localversion* and the config | ||
| 696 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. | ||
| 697 | # LOCALVERSION from the command line override all of this | ||
| 698 | |||
| 699 | nullstring := | ||
| 700 | space := $(nullstring) # end of line | ||
| 701 | |||
| 702 | ___localver = $(objtree)/localversion* $(srctree)/localversion* | ||
| 703 | __localver = $(sort $(wildcard $(___localver))) | ||
| 704 | # skip backup files (containing '~') | ||
| 705 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) | ||
| 706 | |||
| 707 | localver = $(subst $(space),, \ | ||
| 708 | $(shell cat /dev/null $(_localver)) \ | ||
| 709 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | ||
| 710 | |||
| 711 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called | ||
| 712 | # and if the SCM is know a tag from the SCM is appended. | ||
| 713 | # The appended tag is determinded by the SCM used. | ||
| 714 | # | ||
| 715 | # Currently, only git is supported. | ||
| 716 | # Other SCMs can edit scripts/setlocalversion and add the appropriate | ||
| 717 | # checks as needed. | ||
| 718 | ifdef CONFIG_LOCALVERSION_AUTO | ||
| 719 | _localver-auto = $(shell $(CONFIG_SHELL) \ | ||
| 720 | $(srctree)/scripts/setlocalversion $(srctree)) | ||
| 721 | localver-auto = $(LOCALVERSION)$(_localver-auto) | ||
| 722 | endif | ||
| 723 | |||
| 724 | localver-full = $(localver)$(localver-auto) | ||
| 725 | |||
| 726 | # Store (new) KERNELRELASE string in .kernelrelease | ||
| 727 | kernelrelease = $(KERNELVERSION)$(localver-full) | ||
| 728 | .kernelrelease: FORCE | ||
| 729 | $(Q)rm -f $@ | ||
| 730 | $(Q)echo $(kernelrelease) > $@ | ||
| 731 | |||
| 732 | |||
| 733 | # Things we need to do before we recursively start building the kernel | ||
| 734 | # or the modules are listed in "prepare". | ||
| 735 | # A multi level approach is used. prepareN is processed before prepareN-1. | ||
| 736 | # archprepare is used in arch Makefiles and when processed asm symlink, | ||
| 737 | # version.h and scripts_basic is processed / created. | ||
| 738 | |||
| 739 | # Listed in dependency order | ||
| 740 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 | ||
| 741 | |||
| 742 | # prepare-all is deprecated, use prepare as valid replacement | ||
| 743 | PHONY += prepare-all | ||
| 744 | |||
| 745 | # prepare3 is used to check if we are building in a separate output directory, | ||
| 746 | # and if so do: | ||
| 747 | # 1) Check that make has not been executed in the kernel src $(srctree) | ||
| 748 | # 2) Create the include2 directory, used for the second asm symlink | ||
| 749 | prepare3: .kernelrelease | ||
| 750 | ifneq ($(KBUILD_SRC),) | ||
| 751 | @echo ' Using $(srctree) as source for kernel' | ||
| 752 | $(Q)if [ -f $(srctree)/.config ]; then \ | ||
| 753 | echo " $(srctree) is not clean, please run 'make mrproper'";\ | ||
| 754 | echo " in the '$(srctree)' directory.";\ | ||
| 755 | /bin/false; \ | ||
| 756 | fi; | ||
| 757 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | ||
| 758 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm | ||
| 759 | endif | ||
| 760 | |||
| 761 | # prepare2 creates a makefile if using a separate output directory | ||
| 762 | prepare2: prepare3 outputmakefile | ||
| 763 | |||
| 764 | prepare1: prepare2 include/config/MARKER | ||
| 765 | ifneq ($(KBUILD_MODULES),) | ||
| 766 | $(Q)mkdir -p $(MODVERDIR) | ||
| 767 | $(Q)rm -f $(MODVERDIR)/* | ||
| 768 | endif | ||
| 769 | |||
| 770 | archprepare: prepare1 scripts_basic | ||
| 771 | |||
| 772 | prepare0: archprepare FORCE | ||
| 773 | $(Q)$(MAKE) $(build)=. | ||
| 774 | |||
| 775 | # All the preparing.. | ||
| 776 | prepare prepare-all: prepare0 | ||
| 777 | |||
| 778 | # Leave this as default for preprocessing busybox.lds.S, which is now | ||
| 779 | # done in arch/$(ARCH)/kernel/Makefile | ||
| 780 | |||
| 781 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) | ||
| 782 | |||
| 783 | # FIXME: The asm symlink changes when $(ARCH) changes. That's | ||
| 784 | # hard to detect, but I suppose "make mrproper" is a good idea | ||
| 785 | # before switching between archs anyway. | ||
| 786 | |||
| 787 | #bbox# include/asm: | ||
| 788 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' | ||
| 789 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; | ||
| 790 | #bbox# @ln -fsn asm-$(ARCH) $@ | ||
| 791 | |||
| 792 | # Split autoconf.h into include/linux/config/* | ||
| 793 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h | ||
| 794 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h | ||
| 795 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* | ||
| 796 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config | ||
| 797 | #bbox# piggybacked generation of few .h files | ||
| 798 | include/config/MARKER: scripts/basic/split-include include/autoconf.h | ||
| 799 | $(call cmd,split_autoconf) | ||
| 800 | $(call cmd,gen_bbconfigopts) | ||
| 801 | @touch $@ | ||
| 802 | |||
| 803 | # Generate some files | ||
| 804 | # --------------------------------------------------------------------------- | ||
| 805 | |||
| 806 | # KERNELRELEASE can change from a few different places, meaning version.h | ||
| 807 | # needs to be updated, so this check is forced on all builds | ||
| 808 | |||
| 809 | uts_len := 64 | ||
| 810 | |||
| 811 | define filechk_version.h | ||
| 812 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | ||
| 813 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | ||
| 814 | exit 1; \ | ||
| 815 | fi; \ | ||
| 816 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ | ||
| 817 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ | ||
| 818 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ | ||
| 819 | ) | ||
| 820 | endef | ||
| 821 | |||
| 822 | # --------------------------------------------------------------------------- | ||
| 823 | |||
| 824 | PHONY += depend dep | ||
| 825 | depend dep: | ||
| 826 | @echo '*** Warning: make $@ is unnecessary now.' | ||
| 827 | |||
| 828 | # --------------------------------------------------------------------------- | ||
| 829 | # Modules | ||
| 830 | |||
| 831 | ifdef CONFIG_MODULES | ||
| 832 | |||
| 833 | # By default, build modules as well | ||
| 834 | |||
| 835 | all: modules | ||
| 836 | |||
| 837 | # Build modules | ||
| 838 | |||
| 839 | PHONY += modules | ||
| 840 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) | ||
| 841 | @echo ' Building modules, stage 2.'; | ||
| 842 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
| 843 | |||
| 844 | |||
| 845 | # Target to prepare building external modules | ||
| 846 | PHONY += modules_prepare | ||
| 847 | modules_prepare: prepare scripts | ||
| 848 | |||
| 849 | # Target to install modules | ||
| 850 | PHONY += modules_install | ||
| 851 | modules_install: _modinst_ _modinst_post | ||
| 852 | |||
| 853 | PHONY += _modinst_ | ||
| 854 | _modinst_: | ||
| 855 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ | ||
| 856 | echo "Warning: you may need to install module-init-tools"; \ | ||
| 857 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | ||
| 858 | sleep 1; \ | ||
| 859 | fi | ||
| 860 | @rm -rf $(MODLIB)/kernel | ||
| 861 | @rm -f $(MODLIB)/source | ||
| 862 | @mkdir -p $(MODLIB)/kernel | ||
| 863 | @ln -s $(srctree) $(MODLIB)/source | ||
| 864 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | ||
| 865 | rm -f $(MODLIB)/build ; \ | ||
| 866 | ln -s $(objtree) $(MODLIB)/build ; \ | ||
| 867 | fi | ||
| 868 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
| 869 | |||
| 870 | # If System.map exists, run depmod. This deliberately does not have a | ||
| 871 | # dependency on System.map since that would run the dependency tree on | ||
| 872 | # busybox. This depmod is only for convenience to give the initial | ||
| 873 | # boot a modules.dep even before / is mounted read-write. However the | ||
| 874 | # boot script depmod is the master version. | ||
| 875 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" | ||
| 876 | depmod_opts := | ||
| 877 | else | ||
| 878 | depmod_opts := -b $(INSTALL_MOD_PATH) -r | ||
| 879 | endif | ||
| 880 | PHONY += _modinst_post | ||
| 881 | _modinst_post: _modinst_ | ||
| 882 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi | ||
| 883 | |||
| 884 | else # CONFIG_MODULES | ||
| 885 | |||
| 886 | # Modules not configured | ||
| 887 | # --------------------------------------------------------------------------- | ||
| 888 | |||
| 889 | modules modules_install: FORCE | ||
| 890 | @echo | ||
| 891 | @echo "The present busybox configuration has modules disabled." | ||
| 892 | @echo "Type 'make config' and enable loadable module support." | ||
| 893 | @echo "Then build a kernel with module support enabled." | ||
| 894 | @echo | ||
| 895 | @exit 1 | ||
| 896 | |||
| 897 | endif # CONFIG_MODULES | ||
| 898 | |||
| 899 | ### | ||
| 900 | # Cleaning is done on three levels. | ||
| 901 | # make clean Delete most generated files | ||
| 902 | # Leave enough to build external modules | ||
| 903 | # make mrproper Delete the current configuration, and all generated files | ||
| 904 | # make distclean Remove editor backup files, patch leftover files and the like | ||
| 905 | |||
| 906 | # Directories & files removed with 'make clean' | ||
| 907 | CLEAN_DIRS += $(MODVERDIR) | ||
| 908 | CLEAN_FILES += busybox* System.map \ | ||
| 909 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map | ||
| 910 | |||
| 911 | # Directories & files removed with 'make mrproper' | ||
| 912 | MRPROPER_DIRS += include/config include2 | ||
| 913 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ | ||
| 914 | include/autoconf.h \ | ||
| 915 | include/bbconfigopts.h \ | ||
| 916 | include/usage_compressed.h \ | ||
| 917 | .kernelrelease Module.symvers tags TAGS cscope* | ||
| 918 | |||
| 919 | # clean - Delete most, but leave enough to build external modules | ||
| 920 | # | ||
| 921 | clean: rm-dirs := $(CLEAN_DIRS) | ||
| 922 | clean: rm-files := $(CLEAN_FILES) | ||
| 923 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) | ||
| 924 | |||
| 925 | PHONY += $(clean-dirs) clean archclean | ||
| 926 | $(clean-dirs): | ||
| 927 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
| 928 | |||
| 929 | clean: archclean $(clean-dirs) | ||
| 930 | $(call cmd,rmdirs) | ||
| 931 | $(call cmd,rmfiles) | ||
| 932 | @find . $(RCS_FIND_IGNORE) \ | ||
| 933 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
| 934 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
| 935 | -type f -print | xargs rm -f | ||
| 936 | |||
| 937 | # mrproper - Delete all generated files, including .config | ||
| 938 | # | ||
| 939 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | ||
| 940 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | ||
| 941 | mrproper-dirs := $(addprefix _mrproper_,scripts) | ||
| 942 | |||
| 943 | PHONY += $(mrproper-dirs) mrproper archmrproper | ||
| 944 | $(mrproper-dirs): | ||
| 945 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | ||
| 946 | |||
| 947 | mrproper: clean archmrproper $(mrproper-dirs) | ||
| 948 | $(call cmd,rmdirs) | ||
| 949 | $(call cmd,rmfiles) | ||
| 950 | |||
| 951 | # distclean | ||
| 952 | # | ||
| 953 | PHONY += distclean | ||
| 954 | |||
| 955 | distclean: mrproper | ||
| 956 | @find $(srctree) $(RCS_FIND_IGNORE) \ | ||
| 957 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | ||
| 958 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | ||
| 959 | -o -name '.*.rej' -o -size 0 \ | ||
| 960 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | ||
| 961 | -type f -print | xargs rm -f | ||
| 962 | |||
| 963 | |||
| 964 | # Packaging of the kernel to various formats | ||
| 965 | # --------------------------------------------------------------------------- | ||
| 966 | # rpm target kept for backward compatibility | ||
| 967 | package-dir := $(srctree)/scripts/package | ||
| 968 | |||
| 969 | %pkg: FORCE | ||
| 970 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | ||
| 971 | rpm: FORCE | ||
| 972 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | ||
| 973 | |||
| 974 | |||
| 975 | # Brief documentation of the typical targets used | ||
| 976 | # --------------------------------------------------------------------------- | ||
| 977 | |||
| 978 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | ||
| 979 | boards := $(notdir $(boards)) | ||
| 980 | |||
| 981 | -include $(srctree)/Makefile.help | ||
| 982 | |||
| 983 | # Documentation targets | ||
| 984 | # --------------------------------------------------------------------------- | ||
| 985 | %docs: scripts_basic FORCE | ||
| 986 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | ||
| 987 | |||
| 988 | else # KBUILD_EXTMOD | ||
| 989 | |||
| 990 | ### | ||
| 991 | # External module support. | ||
| 992 | # When building external modules the kernel used as basis is considered | ||
| 993 | # read-only, and no consistency checks are made and the make | ||
| 994 | # system is not used on the basis kernel. If updates are required | ||
| 995 | # in the basis kernel ordinary make commands (without M=...) must | ||
| 996 | # be used. | ||
| 997 | # | ||
| 998 | # The following are the only valid targets when building external | ||
| 999 | # modules. | ||
| 1000 | # make M=dir clean Delete all automatically generated files | ||
| 1001 | # make M=dir modules Make all modules in specified dir | ||
| 1002 | # make M=dir Same as 'make M=dir modules' | ||
| 1003 | # make M=dir modules_install | ||
| 1004 | # Install the modules build in the module directory | ||
| 1005 | # Assumes install directory is already created | ||
| 1006 | |||
| 1007 | # We are always building modules | ||
| 1008 | KBUILD_MODULES := 1 | ||
| 1009 | PHONY += crmodverdir | ||
| 1010 | crmodverdir: | ||
| 1011 | $(Q)mkdir -p $(MODVERDIR) | ||
| 1012 | $(Q)rm -f $(MODVERDIR)/* | ||
| 1013 | |||
| 1014 | PHONY += $(objtree)/Module.symvers | ||
| 1015 | $(objtree)/Module.symvers: | ||
| 1016 | @test -e $(objtree)/Module.symvers || ( \ | ||
| 1017 | echo; \ | ||
| 1018 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | ||
| 1019 | echo " is missing; modules will have no dependencies and modversions."; \ | ||
| 1020 | echo ) | ||
| 1021 | |||
| 1022 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | ||
| 1023 | PHONY += $(module-dirs) modules | ||
| 1024 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | ||
| 1025 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | ||
| 1026 | |||
| 1027 | modules: $(module-dirs) | ||
| 1028 | @echo ' Building modules, stage 2.'; | ||
| 1029 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
| 1030 | |||
| 1031 | PHONY += modules_install | ||
| 1032 | modules_install: _emodinst_ _emodinst_post | ||
| 1033 | |||
| 1034 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | ||
| 1035 | PHONY += _emodinst_ | ||
| 1036 | _emodinst_: | ||
| 1037 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | ||
| 1038 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
| 1039 | |||
| 1040 | # Run depmod only is we have System.map and depmod is executable | ||
| 1041 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | ||
| 1042 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ | ||
| 1043 | $(DEPMOD) -ae -F System.map \ | ||
| 1044 | $(if $(strip $(INSTALL_MOD_PATH)), \ | ||
| 1045 | -b $(INSTALL_MOD_PATH) -r) \ | ||
| 1046 | $(KERNELRELEASE); \ | ||
| 1047 | fi | ||
| 1048 | |||
| 1049 | PHONY += _emodinst_post | ||
| 1050 | _emodinst_post: _emodinst_ | ||
| 1051 | $(call cmd,depmod) | ||
| 1052 | |||
| 1053 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | ||
| 1054 | |||
| 1055 | PHONY += $(clean-dirs) clean | ||
| 1056 | $(clean-dirs): | ||
| 1057 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
| 1058 | |||
| 1059 | clean: rm-dirs := $(MODVERDIR) | ||
| 1060 | clean: $(clean-dirs) | ||
| 1061 | $(call cmd,rmdirs) | ||
| 1062 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | ||
| 1063 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
| 1064 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
| 1065 | -type f -print | xargs rm -f | ||
| 1066 | |||
| 1067 | help: | ||
| 1068 | @echo ' Building external modules.' | ||
| 1069 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | ||
| 1070 | @echo '' | ||
| 1071 | @echo ' modules - default target, build the module(s)' | ||
| 1072 | @echo ' modules_install - install the module' | ||
| 1073 | @echo ' clean - remove generated files in module directory only' | ||
| 1074 | @echo '' | ||
| 1075 | |||
| 1076 | # Dummies... | ||
| 1077 | PHONY += prepare scripts | ||
| 1078 | prepare: ; | ||
| 1079 | scripts: ; | ||
| 1080 | endif # KBUILD_EXTMOD | ||
| 1081 | |||
| 1082 | # Generate tags for editors | ||
| 1083 | # --------------------------------------------------------------------------- | ||
| 1084 | |||
| 1085 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | ||
| 1086 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | ||
| 1087 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | ||
| 1088 | |||
| 1089 | ifeq ($(src),$(obj)) | ||
| 1090 | __srctree = | ||
| 1091 | else | ||
| 1092 | __srctree = $(srctree)/ | ||
| 1093 | endif | ||
| 1094 | |||
| 1095 | ifeq ($(ALLSOURCE_ARCHS),) | ||
| 1096 | ifeq ($(ARCH),um) | ||
| 1097 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) | ||
| 1098 | else | ||
| 1099 | ALLINCLUDE_ARCHS := $(ARCH) | ||
| 1100 | endif | ||
| 1101 | else | ||
| 1102 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. | ||
| 1103 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) | ||
| 1104 | endif | ||
| 1105 | |||
| 1106 | ALLSOURCE_ARCHS := $(ARCH) | ||
| 1107 | |||
| 1108 | define all-sources | ||
| 1109 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ | ||
| 1110 | \( -name include -o -name arch \) -prune -o \ | ||
| 1111 | -name '*.[chS]' -print; \ | ||
| 1112 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ | ||
| 1113 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ | ||
| 1114 | -name '*.[chS]' -print; \ | ||
| 1115 | done ; \ | ||
| 1116 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ | ||
| 1117 | -name '*.[chS]' -print; \ | ||
| 1118 | find $(__srctree)include $(RCS_FIND_IGNORE) \ | ||
| 1119 | \( -name config -o -name 'asm-*' \) -prune \ | ||
| 1120 | -o -name '*.[chS]' -print; \ | ||
| 1121 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ | ||
| 1122 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ | ||
| 1123 | -name '*.[chS]' -print; \ | ||
| 1124 | done ; \ | ||
| 1125 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ | ||
| 1126 | -name '*.[chS]' -print ) | ||
| 1127 | endef | ||
| 1128 | |||
| 1129 | quiet_cmd_cscope-file = FILELST cscope.files | ||
| 1130 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files | ||
| 1131 | |||
| 1132 | quiet_cmd_cscope = MAKE cscope.out | ||
| 1133 | cmd_cscope = cscope -b | ||
| 1134 | |||
| 1135 | cscope: FORCE | ||
| 1136 | $(call cmd,cscope-file) | ||
| 1137 | $(call cmd,cscope) | ||
| 1138 | |||
| 1139 | quiet_cmd_TAGS = MAKE $@ | ||
| 1140 | define cmd_TAGS | ||
| 1141 | rm -f $@; \ | ||
| 1142 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ | ||
| 1143 | echo "-I __initdata,__exitdata,__acquires,__releases \ | ||
| 1144 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | ||
| 1145 | --extra=+f --c-kinds=+px"`; \ | ||
| 1146 | $(all-sources) | xargs etags $$ETAGSF -a | ||
| 1147 | endef | ||
| 1148 | |||
| 1149 | TAGS: FORCE | ||
| 1150 | $(call cmd,TAGS) | ||
| 1151 | |||
| 1152 | |||
| 1153 | quiet_cmd_tags = MAKE $@ | ||
| 1154 | define cmd_tags | ||
| 1155 | rm -f $@; \ | ||
| 1156 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ | ||
| 1157 | echo "-I __initdata,__exitdata,__acquires,__releases \ | ||
| 1158 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | ||
| 1159 | --extra=+f --c-kinds=+px"`; \ | ||
| 1160 | $(all-sources) | xargs ctags $$CTAGSF -a | ||
| 1161 | endef | ||
| 1162 | |||
| 1163 | tags: FORCE | ||
| 1164 | $(call cmd,tags) | ||
| 1165 | |||
| 1166 | |||
| 1167 | # Scripts to check various things for consistency | ||
| 1168 | # --------------------------------------------------------------------------- | ||
| 1169 | |||
| 1170 | includecheck: | ||
| 1171 | find * $(RCS_FIND_IGNORE) \ | ||
| 1172 | -name '*.[hcS]' -type f -print | sort \ | ||
| 1173 | | xargs $(PERL) -w scripts/checkincludes.pl | ||
| 1174 | |||
| 1175 | versioncheck: | ||
| 1176 | find * $(RCS_FIND_IGNORE) \ | ||
| 1177 | -name '*.[hcS]' -type f -print | sort \ | ||
| 1178 | | xargs $(PERL) -w scripts/checkversion.pl | ||
| 1179 | |||
| 1180 | namespacecheck: | ||
| 1181 | $(PERL) $(srctree)/scripts/namespace.pl | ||
| 1182 | |||
| 1183 | endif #ifeq ($(config-targets),1) | ||
| 1184 | endif #ifeq ($(mixed-targets),1) | ||
| 1185 | |||
| 1186 | PHONY += checkstack | ||
| 1187 | checkstack: | ||
| 1188 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ | ||
| 1189 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) | ||
| 1190 | |||
| 1191 | kernelrelease: | ||
| 1192 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ | ||
| 1193 | $(error kernelrelease not valid - run 'make *config' to update it)) | ||
| 1194 | kernelversion: | ||
| 1195 | @echo $(KERNELVERSION) | ||
| 1196 | |||
| 1197 | # Single targets | ||
| 1198 | # --------------------------------------------------------------------------- | ||
| 1199 | # Single targets are compatible with: | ||
| 1200 | # - build whith mixed source and output | ||
| 1201 | # - build with separate output dir 'make O=...' | ||
| 1202 | # - external modules | ||
| 1203 | # | ||
| 1204 | # target-dir => where to store outputfile | ||
| 1205 | # build-dir => directory in kernel source tree to use | ||
| 1206 | |||
| 1207 | ifeq ($(KBUILD_EXTMOD),) | ||
| 1208 | build-dir = $(patsubst %/,%,$(dir $@)) | ||
| 1209 | target-dir = $(dir $@) | ||
| 1210 | else | ||
| 1211 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | ||
| 1212 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | ||
| 1213 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | ||
| 1214 | endif | ||
| 1215 | |||
| 1216 | %.s: %.c prepare scripts FORCE | ||
| 1217 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1218 | %.i: %.c prepare scripts FORCE | ||
| 1219 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1220 | %.o: %.c prepare scripts FORCE | ||
| 1221 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1222 | %.lst: %.c prepare scripts FORCE | ||
| 1223 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1224 | %.s: %.S prepare scripts FORCE | ||
| 1225 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1226 | %.o: %.S prepare scripts FORCE | ||
| 1227 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
| 1228 | |||
| 1229 | # Modules | ||
| 1230 | / %/: prepare scripts FORCE | ||
| 1231 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | ||
| 1232 | $(build)=$(build-dir) | ||
| 1233 | %.ko: prepare scripts FORCE | ||
| 1234 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | ||
| 1235 | $(build)=$(build-dir) $(@:.ko=.o) | ||
| 1236 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
| 1237 | |||
| 1238 | # FIXME Should go into a make.lib or something | ||
| 1239 | # =========================================================================== | ||
| 1240 | |||
| 1241 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | ||
| 1242 | cmd_rmdirs = rm -rf $(rm-dirs) | ||
| 1243 | |||
| 1244 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | ||
| 1245 | cmd_rmfiles = rm -f $(rm-files) | ||
| 1246 | |||
| 1247 | |||
| 1248 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ | ||
| 1249 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | ||
| 1250 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) | ||
| 1251 | |||
| 1252 | quiet_cmd_as_o_S = AS $@ | ||
| 1253 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | ||
| 1254 | |||
| 1255 | # read all saved command lines | ||
| 1256 | |||
| 1257 | targets := $(wildcard $(sort $(targets))) | ||
| 1258 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | ||
| 1259 | |||
| 1260 | ifneq ($(cmd_files),) | ||
| 1261 | $(cmd_files): ; # Do not try to update included dependency files | ||
| 1262 | include $(cmd_files) | ||
| 1263 | endif | ||
| 1264 | |||
| 1265 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir | ||
| 1266 | # Usage: | ||
| 1267 | # $(Q)$(MAKE) $(clean)=dir | ||
| 1268 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | ||
| 1269 | |||
| 1270 | endif # skip-makefile | ||
| 1271 | |||
| 1272 | PHONY += FORCE | ||
| 1273 | FORCE: | ||
| 1274 | |||
| 1275 | -include $(srctree)/Makefile.custom | ||
| 1276 | |||
| 1277 | # Declare the contents of the .PHONY variable as phony. We keep that | ||
| 1278 | # information in a variable se we can use it in if_changed and friends. | ||
| 1279 | .PHONY: $(PHONY) |