Contents of /trunk/mkinitrd-magellan/busybox/Makefile
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Revision 1141 -
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Thu Aug 19 12:42:04 2010 UTC (13 years, 8 months ago) by niro
File size: 43327 byte(s)
Thu Aug 19 12:42:04 2010 UTC (13 years, 8 months ago) by niro
File size: 43327 byte(s)
-fixed make-3.82 showstopper: Makefile:436: *** mixed implicit and normal rules. Stop.
| 1 | VERSION = 1 |
| 2 | PATCHLEVEL = 17 |
| 3 | SUBLEVEL = 1 |
| 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 | # Cross compiling and selecting different set of gcc/bin-utils |
| 146 | # --------------------------------------------------------------------------- |
| 147 | # |
| 148 | # When performing cross compilation for other architectures ARCH shall be set |
| 149 | # to the target architecture. (See arch/* for the possibilities). |
| 150 | # ARCH can be set during invocation of make: |
| 151 | # make ARCH=ia64 |
| 152 | # Another way is to have ARCH set in the environment. |
| 153 | # The default ARCH is the host where make is executed. |
| 154 | |
| 155 | # CROSS_COMPILE specify the prefix used for all executables used |
| 156 | # during compilation. Only gcc and related bin-utils executables |
| 157 | # are prefixed with $(CROSS_COMPILE). |
| 158 | # CROSS_COMPILE can be set on the command line |
| 159 | # make CROSS_COMPILE=ia64-linux- |
| 160 | # Alternatively CROSS_COMPILE can be set in the environment. |
| 161 | # Default value for CROSS_COMPILE is not to prefix executables |
| 162 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| 163 | |
| 164 | CROSS_COMPILE ?= |
| 165 | # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config, |
| 166 | # and it has not been included yet... thus using an awkward syntax. |
| 167 | ifeq ($(CROSS_COMPILE),) |
| 168 | CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null) |
| 169 | CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE)) |
| 170 | CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE)) |
| 171 | #") |
| 172 | endif |
| 173 | |
| 174 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
| 175 | # first, and if a usermode build is happening, the "ARCH=um" on the command |
| 176 | # line overrides the setting of ARCH below. If a native build is happening, |
| 177 | # then ARCH is assigned, getting whatever value it gets normally, and |
| 178 | # SUBARCH is subsequently ignored. |
| 179 | |
| 180 | ifneq ($(CROSS_COMPILE),) |
| 181 | SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1) |
| 182 | else |
| 183 | SUBARCH := $(shell uname -m) |
| 184 | endif |
| 185 | SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ |
| 186 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
| 187 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
| 188 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) |
| 189 | |
| 190 | ARCH ?= $(SUBARCH) |
| 191 | |
| 192 | # Architecture as present in compile.h |
| 193 | UTS_MACHINE := $(ARCH) |
| 194 | |
| 195 | # SHELL used by kbuild |
| 196 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
| 197 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
| 198 | else echo sh; fi ; fi) |
| 199 | |
| 200 | # Decide whether to build built-in, modular, or both. |
| 201 | # Normally, just do built-in. |
| 202 | |
| 203 | KBUILD_MODULES := |
| 204 | KBUILD_BUILTIN := 1 |
| 205 | |
| 206 | # If we have only "make modules", don't compile built-in objects. |
| 207 | # When we're building modules with modversions, we need to consider |
| 208 | # the built-in objects during the descend as well, in order to |
| 209 | # make sure the checksums are uptodate before we record them. |
| 210 | |
| 211 | ifeq ($(MAKECMDGOALS),modules) |
| 212 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
| 213 | endif |
| 214 | |
| 215 | # If we have "make <whatever> modules", compile modules |
| 216 | # in addition to whatever we do anyway. |
| 217 | # Just "make" or "make all" shall build modules as well |
| 218 | |
| 219 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| 220 | KBUILD_MODULES := 1 |
| 221 | endif |
| 222 | |
| 223 | ifeq ($(MAKECMDGOALS),) |
| 224 | KBUILD_MODULES := 1 |
| 225 | endif |
| 226 | |
| 227 | export KBUILD_MODULES KBUILD_BUILTIN |
| 228 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
| 229 | |
| 230 | # Beautify output |
| 231 | # --------------------------------------------------------------------------- |
| 232 | # |
| 233 | # Normally, we echo the whole command before executing it. By making |
| 234 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| 235 | # $(quiet) to choose other forms of output instead, e.g. |
| 236 | # |
| 237 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| 238 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 239 | # |
| 240 | # If $(quiet) is empty, the whole command will be printed. |
| 241 | # If it is set to "quiet_", only the short version will be printed. |
| 242 | # If it is set to "silent_", nothing wil be printed at all, since |
| 243 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| 244 | # |
| 245 | # A simple variant is to prefix commands with $(Q) - that's useful |
| 246 | # for commands that shall be hidden in non-verbose mode. |
| 247 | # |
| 248 | # $(Q)ln $@ :< |
| 249 | # |
| 250 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| 251 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| 252 | |
| 253 | ifeq ($(KBUILD_VERBOSE),1) |
| 254 | quiet = |
| 255 | Q = |
| 256 | else |
| 257 | quiet=quiet_ |
| 258 | Q = @ |
| 259 | endif |
| 260 | |
| 261 | # If the user is running make -s (silent mode), suppress echoing of |
| 262 | # commands |
| 263 | |
| 264 | ifneq ($(findstring s,$(MAKEFLAGS)),) |
| 265 | quiet=silent_ |
| 266 | endif |
| 267 | |
| 268 | export quiet Q KBUILD_VERBOSE |
| 269 | |
| 270 | |
| 271 | # Look for make include files relative to root of kernel src |
| 272 | MAKEFLAGS += --include-dir=$(srctree) |
| 273 | |
| 274 | HOSTCC = gcc |
| 275 | HOSTCXX = g++ |
| 276 | HOSTCFLAGS := |
| 277 | HOSTCXXFLAGS := |
| 278 | # We need some generic definitions |
| 279 | include $(srctree)/scripts/Kbuild.include |
| 280 | |
| 281 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) |
| 282 | HOSTCXXFLAGS += -O2 |
| 283 | |
| 284 | # For maximum performance (+ possibly random breakage, uncomment |
| 285 | # the following) |
| 286 | |
| 287 | MAKEFLAGS += -rR |
| 288 | |
| 289 | # Make variables (CC, etc...) |
| 290 | |
| 291 | AS = $(CROSS_COMPILE)as |
| 292 | CC = $(CROSS_COMPILE)gcc |
| 293 | LD = $(CC) -nostdlib |
| 294 | CPP = $(CC) -E |
| 295 | AR = $(CROSS_COMPILE)ar |
| 296 | NM = $(CROSS_COMPILE)nm |
| 297 | STRIP = $(CROSS_COMPILE)strip |
| 298 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| 299 | OBJDUMP = $(CROSS_COMPILE)objdump |
| 300 | AWK = awk |
| 301 | GENKSYMS = scripts/genksyms/genksyms |
| 302 | DEPMOD = /sbin/depmod |
| 303 | KALLSYMS = scripts/kallsyms |
| 304 | PERL = perl |
| 305 | CHECK = sparse |
| 306 | |
| 307 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
| 308 | MODFLAGS = -DMODULE |
| 309 | CFLAGS_MODULE = $(MODFLAGS) |
| 310 | AFLAGS_MODULE = $(MODFLAGS) |
| 311 | LDFLAGS_MODULE = -r |
| 312 | CFLAGS_KERNEL = |
| 313 | AFLAGS_KERNEL = |
| 314 | |
| 315 | |
| 316 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| 317 | # Needed to be compatible with the O= option |
| 318 | CFLAGS := $(CFLAGS) |
| 319 | # Added only to final link stage of busybox binary |
| 320 | CFLAGS_busybox := $(CFLAGS_busybox) |
| 321 | CPPFLAGS := $(CPPFLAGS) |
| 322 | AFLAGS := $(AFLAGS) |
| 323 | LDFLAGS := $(LDFLAGS) |
| 324 | LDLIBS := |
| 325 | |
| 326 | # Read KERNELRELEASE from .kernelrelease (if it exists) |
| 327 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) |
| 328 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
| 329 | |
| 330 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ |
| 331 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ |
| 332 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ |
| 333 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| 334 | |
| 335 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
| 336 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| 337 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| 338 | export FLTFLAGS |
| 339 | |
| 340 | # When compiling out-of-tree modules, put MODVERDIR in the module |
| 341 | # tree rather than in the kernel tree. The kernel tree might |
| 342 | # even be read-only. |
| 343 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| 344 | |
| 345 | # Files to ignore in find ... statements |
| 346 | |
| 347 | 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 |
| 348 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| 349 | |
| 350 | # =========================================================================== |
| 351 | # Rules shared between *config targets and build targets |
| 352 | |
| 353 | # Basic helpers built in scripts/ |
| 354 | PHONY += scripts_basic |
| 355 | scripts_basic: |
| 356 | $(Q)$(MAKE) $(build)=scripts/basic |
| 357 | |
| 358 | # To avoid any implicit rule to kick in, define an empty command. |
| 359 | scripts/basic/%: scripts_basic ; |
| 360 | |
| 361 | # This target generates Kbuild's and Config.in's from *.c files |
| 362 | PHONY += gen_build_files |
| 363 | gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) |
| 364 | $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree) |
| 365 | |
| 366 | # bbox: we have helpers in applets/ |
| 367 | # we depend on scripts_basic, since scripts/basic/fixdep |
| 368 | # must be built before any other host prog |
| 369 | PHONY += applets_dir |
| 370 | applets_dir: scripts_basic gen_build_files |
| 371 | $(Q)$(MAKE) $(build)=applets |
| 372 | |
| 373 | applets/%: applets_dir ; |
| 374 | |
| 375 | PHONY += outputmakefile |
| 376 | # outputmakefile generates a Makefile in the output directory, if using a |
| 377 | # separate output directory. This allows convenient use of make in the |
| 378 | # output directory. |
| 379 | outputmakefile: |
| 380 | ifneq ($(KBUILD_SRC),) |
| 381 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
| 382 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
| 383 | endif |
| 384 | |
| 385 | # To make sure we do not include .config for any of the *config targets |
| 386 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| 387 | # It is allowed to specify more targets when calling make, including |
| 388 | # mixing *config targets and build targets. |
| 389 | # For example 'make oldconfig all'. |
| 390 | # Detect when mixed targets is specified, and make a second invocation |
| 391 | # of make so .config is not included in this case either (for *config). |
| 392 | |
| 393 | no-dot-config-targets := clean mrproper distclean \ |
| 394 | cscope TAGS tags help %docs |
| 395 | #bbox# check% is removed from above |
| 396 | |
| 397 | config-targets := 0 |
| 398 | mixed-targets := 0 |
| 399 | dot-config := 1 |
| 400 | |
| 401 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 402 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 403 | dot-config := 0 |
| 404 | endif |
| 405 | endif |
| 406 | |
| 407 | ifeq ($(KBUILD_EXTMOD),) |
| 408 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| 409 | config-targets := 1 |
| 410 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
| 411 | mixed-targets := 1 |
| 412 | endif |
| 413 | endif |
| 414 | endif |
| 415 | |
| 416 | ifeq ($(mixed-targets),1) |
| 417 | # =========================================================================== |
| 418 | # We're called with mixed targets (*config and build targets). |
| 419 | # Handle them one by one. |
| 420 | |
| 421 | %:: FORCE |
| 422 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
| 423 | |
| 424 | else |
| 425 | ifeq ($(config-targets),1) |
| 426 | # =========================================================================== |
| 427 | # *config targets only - make sure prerequisites are updated, and descend |
| 428 | # in scripts/kconfig to make the *config target |
| 429 | |
| 430 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| 431 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| 432 | # used for 'make defconfig' |
| 433 | -include $(srctree)/arch/$(ARCH)/Makefile |
| 434 | export KBUILD_DEFCONFIG |
| 435 | |
| 436 | config: scripts_basic outputmakefile gen_build_files FORCE |
| 437 | $(Q)mkdir -p include |
| 438 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 439 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
| 440 | |
| 441 | %config: scripts_basic outputmakefile gen_build_files FORCE |
| 442 | $(Q)mkdir -p include |
| 443 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 444 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
| 445 | |
| 446 | else |
| 447 | # =========================================================================== |
| 448 | # Build targets only - this includes busybox, arch specific targets, clean |
| 449 | # targets and others. In general all targets except *config targets. |
| 450 | |
| 451 | ifeq ($(KBUILD_EXTMOD),) |
| 452 | # Additional helpers built in scripts/ |
| 453 | # Carefully list dependencies so we do not try to build scripts twice |
| 454 | # in parallel |
| 455 | PHONY += scripts |
| 456 | scripts: gen_build_files scripts_basic include/config/MARKER |
| 457 | $(Q)$(MAKE) $(build)=$(@) |
| 458 | |
| 459 | scripts_basic: include/autoconf.h |
| 460 | |
| 461 | # Objects we will link into busybox / subdirs we need to visit |
| 462 | core-y := \ |
| 463 | applets/ \ |
| 464 | |
| 465 | libs-y := \ |
| 466 | archival/ \ |
| 467 | archival/libunarchive/ \ |
| 468 | console-tools/ \ |
| 469 | coreutils/ \ |
| 470 | coreutils/libcoreutils/ \ |
| 471 | debianutils/ \ |
| 472 | e2fsprogs/ \ |
| 473 | editors/ \ |
| 474 | findutils/ \ |
| 475 | init/ \ |
| 476 | libbb/ \ |
| 477 | libpwdgrp/ \ |
| 478 | loginutils/ \ |
| 479 | mailutils/ \ |
| 480 | miscutils/ \ |
| 481 | modutils/ \ |
| 482 | networking/ \ |
| 483 | networking/libiproute/ \ |
| 484 | networking/udhcp/ \ |
| 485 | printutils/ \ |
| 486 | procps/ \ |
| 487 | runit/ \ |
| 488 | selinux/ \ |
| 489 | shell/ \ |
| 490 | sysklogd/ \ |
| 491 | util-linux/ \ |
| 492 | util-linux/volume_id/ \ |
| 493 | |
| 494 | endif # KBUILD_EXTMOD |
| 495 | |
| 496 | ifeq ($(dot-config),1) |
| 497 | # In this section, we need .config |
| 498 | |
| 499 | # Read in dependencies to all Kconfig* files, make sure to run |
| 500 | # oldconfig if changes are detected. |
| 501 | -include .kconfig.d |
| 502 | |
| 503 | -include .config |
| 504 | |
| 505 | # If .config needs to be updated, it will be done via the dependency |
| 506 | # that autoconf has on .config. |
| 507 | # To avoid any implicit rule to kick in, define an empty command |
| 508 | .config .kconfig.d: ; |
| 509 | |
| 510 | # Now we can define CFLAGS etc according to .config |
| 511 | include $(srctree)/Makefile.flags |
| 512 | |
| 513 | # If .config is newer than include/autoconf.h, someone tinkered |
| 514 | # with it and forgot to run make oldconfig. |
| 515 | # If kconfig.d is missing then we are probarly in a cleaned tree so |
| 516 | # we execute the config step to be sure to catch updated Kconfig files |
| 517 | include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files |
| 518 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
| 519 | |
| 520 | include/usage.h: gen_build_files |
| 521 | |
| 522 | else |
| 523 | # Dummy target needed, because used as prerequisite |
| 524 | include/autoconf.h: ; |
| 525 | endif |
| 526 | |
| 527 | # The all: target is the default when no target is given on the |
| 528 | # command line. |
| 529 | # This allow a user to issue only 'make' to build a kernel including modules |
| 530 | # Defaults busybox but it is usually overridden in the arch makefile |
| 531 | all: busybox doc |
| 532 | |
| 533 | -include $(srctree)/arch/$(ARCH)/Makefile |
| 534 | |
| 535 | # arch Makefile may override CC so keep this after arch Makefile is included |
| 536 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| 537 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
| 538 | |
| 539 | # Default kernel image to build when no specific target is given. |
| 540 | # KBUILD_IMAGE may be overruled on the commandline or |
| 541 | # set in the environment |
| 542 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| 543 | # this default value |
| 544 | export KBUILD_IMAGE ?= busybox |
| 545 | |
| 546 | # |
| 547 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| 548 | # images. Default is /boot, but you can set it to other values |
| 549 | export INSTALL_PATH ?= /boot |
| 550 | |
| 551 | # |
| 552 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| 553 | # relocations required by build roots. This is not defined in the |
| 554 | # makefile but the arguement can be passed to make if needed. |
| 555 | # |
| 556 | |
| 557 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| 558 | export MODLIB |
| 559 | |
| 560 | |
| 561 | ifeq ($(KBUILD_EXTMOD),) |
| 562 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) |
| 563 | |
| 564 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ |
| 565 | $(core-n) $(core-) $(libs-n) $(libs-) \ |
| 566 | ))) |
| 567 | |
| 568 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
| 569 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| 570 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
| 571 | libs-y := $(libs-y1) $(libs-y2) |
| 572 | |
| 573 | # Build busybox |
| 574 | # --------------------------------------------------------------------------- |
| 575 | # busybox is build from the objects selected by $(busybox-init) and |
| 576 | # $(busybox-main). Most are built-in.o files from top-level directories |
| 577 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. |
| 578 | # Ordering when linking is important, and $(busybox-init) must be first. |
| 579 | # |
| 580 | # busybox |
| 581 | # ^ |
| 582 | # | |
| 583 | # +-< $(busybox-init) |
| 584 | # | +--< init/version.o + more |
| 585 | # | |
| 586 | # +--< $(busybox-main) |
| 587 | # | +--< driver/built-in.o mm/built-in.o + more |
| 588 | # | |
| 589 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
| 590 | # |
| 591 | # busybox version (uname -v) cannot be updated during normal |
| 592 | # descending-into-subdirs phase since we do not yet know if we need to |
| 593 | # update busybox. |
| 594 | # Therefore this step is delayed until just before final link of busybox - |
| 595 | # except in the kallsyms case where it is done just before adding the |
| 596 | # symbols to the kernel. |
| 597 | # |
| 598 | # System.map is generated to document addresses of all kernel symbols |
| 599 | |
| 600 | busybox-all := $(core-y) $(libs-y) |
| 601 | |
| 602 | # Rule to link busybox - also used during CONFIG_KALLSYMS |
| 603 | # May be overridden by arch/$(ARCH)/Makefile |
| 604 | quiet_cmd_busybox__ ?= LINK $@ |
| 605 | cmd_busybox__ ?= $(srctree)/scripts/trylink \ |
| 606 | "$@" \ |
| 607 | "$(CC)" \ |
| 608 | "$(CFLAGS) $(CFLAGS_busybox)" \ |
| 609 | "$(LDFLAGS) $(EXTRA_LDFLAGS)" \ |
| 610 | "$(core-y)" \ |
| 611 | "$(libs-y)" \ |
| 612 | "$(LDLIBS)" |
| 613 | |
| 614 | # Generate System.map |
| 615 | quiet_cmd_sysmap = SYSMAP |
| 616 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
| 617 | |
| 618 | # Link of busybox |
| 619 | # If CONFIG_KALLSYMS is set .version is already updated |
| 620 | # Generate System.map and verify that the content is consistent |
| 621 | # Use + in front of the busybox_version rule to silent warning with make -j2 |
| 622 | # First command is ':' to allow us to use + in front of the rule |
| 623 | define rule_busybox__ |
| 624 | : |
| 625 | $(call cmd,busybox__) |
| 626 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
| 627 | endef |
| 628 | |
| 629 | |
| 630 | ifdef CONFIG_KALLSYMS |
| 631 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) |
| 632 | # It's a three stage process: |
| 633 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is |
| 634 | # empty |
| 635 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
| 636 | # the right size - busybox version (uname -v) is updated during this step |
| 637 | # o .tmp_busybox2 now has a __kallsyms section of the right size, |
| 638 | # but due to the added section, some addresses have shifted. |
| 639 | # From here, we generate a correct .tmp_kallsyms2.o |
| 640 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. |
| 641 | # o Verify that the System.map from busybox matches the map from |
| 642 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. |
| 643 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using |
| 644 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a |
| 645 | # temporary bypass to allow the kernel to be built while the |
| 646 | # maintainers work out what went wrong with kallsyms. |
| 647 | |
| 648 | ifdef CONFIG_KALLSYMS_EXTRA_PASS |
| 649 | last_kallsyms := 3 |
| 650 | else |
| 651 | last_kallsyms := 2 |
| 652 | endif |
| 653 | |
| 654 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
| 655 | |
| 656 | define verify_kallsyms |
| 657 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
| 658 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
| 659 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map |
| 660 | $(Q)cmp -s System.map .tmp_System.map || \ |
| 661 | (echo Inconsistent kallsyms data; \ |
| 662 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ |
| 663 | rm .tmp_kallsyms* ; /bin/false ) |
| 664 | endef |
| 665 | |
| 666 | # Update busybox version before link |
| 667 | # Use + in front of this rule to silent warning about make -j1 |
| 668 | # First command is ':' to allow us to use + in front of this rule |
| 669 | cmd_ksym_ld = $(cmd_busybox__) |
| 670 | define rule_ksym_ld |
| 671 | : |
| 672 | +$(call cmd,busybox_version) |
| 673 | $(call cmd,busybox__) |
| 674 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
| 675 | endef |
| 676 | |
| 677 | # Generate .S file with all kernel symbols |
| 678 | quiet_cmd_kallsyms = KSYM $@ |
| 679 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
| 680 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
| 681 | |
| 682 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
| 683 | $(call if_changed_dep,as_o_S) |
| 684 | |
| 685 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) |
| 686 | $(call cmd,kallsyms) |
| 687 | |
| 688 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version |
| 689 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE |
| 690 | $(call if_changed_rule,ksym_ld) |
| 691 | |
| 692 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE |
| 693 | $(call if_changed,busybox__) |
| 694 | |
| 695 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE |
| 696 | $(call if_changed,busybox__) |
| 697 | |
| 698 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
| 699 | $(KALLSYMS): scripts ; |
| 700 | |
| 701 | # Generate some data for debugging strange kallsyms problems |
| 702 | debug_kallsyms: .tmp_map$(last_kallsyms) |
| 703 | |
| 704 | .tmp_map%: .tmp_busybox% FORCE |
| 705 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
| 706 | |
| 707 | .tmp_map3: .tmp_map2 |
| 708 | |
| 709 | .tmp_map2: .tmp_map1 |
| 710 | |
| 711 | endif # ifdef CONFIG_KALLSYMS |
| 712 | |
| 713 | # busybox image - including updated kernel symbols |
| 714 | busybox_unstripped: $(busybox-all) FORCE |
| 715 | $(call if_changed_rule,busybox__) |
| 716 | $(Q)rm -f .old_version |
| 717 | |
| 718 | busybox: busybox_unstripped |
| 719 | ifeq ($(SKIP_STRIP),y) |
| 720 | $(Q)cp $< $@ |
| 721 | else |
| 722 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ |
| 723 | busybox_unstripped -o $@ |
| 724 | # strip is confused by PIE executable and does not set exec bits |
| 725 | $(Q)chmod a+x $@ |
| 726 | endif |
| 727 | |
| 728 | # The actual objects are generated when descending, |
| 729 | # make sure no implicit rule kicks in |
| 730 | $(sort $(busybox-all)): $(busybox-dirs) ; |
| 731 | |
| 732 | # Handle descending into subdirectories listed in $(busybox-dirs) |
| 733 | # Preset locale variables to speed up the build process. Limit locale |
| 734 | # tweaks to this spot to avoid wrong language settings when running |
| 735 | # make menuconfig etc. |
| 736 | # Error messages still appears in the original language |
| 737 | |
| 738 | PHONY += $(busybox-dirs) |
| 739 | $(busybox-dirs): prepare scripts |
| 740 | $(Q)$(MAKE) $(build)=$@ |
| 741 | |
| 742 | # Build the kernel release string |
| 743 | # The KERNELRELEASE is stored in a file named .kernelrelease |
| 744 | # to be used when executing for example make install or make modules_install |
| 745 | # |
| 746 | # Take the contents of any files called localversion* and the config |
| 747 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. |
| 748 | # LOCALVERSION from the command line override all of this |
| 749 | |
| 750 | nullstring := |
| 751 | space := $(nullstring) # end of line |
| 752 | |
| 753 | ___localver = $(objtree)/localversion* $(srctree)/localversion* |
| 754 | __localver = $(sort $(wildcard $(___localver))) |
| 755 | # skip backup files (containing '~') |
| 756 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) |
| 757 | |
| 758 | localver = $(subst $(space),, \ |
| 759 | $(shell cat /dev/null $(_localver)) \ |
| 760 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) |
| 761 | |
| 762 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
| 763 | # and if the SCM is know a tag from the SCM is appended. |
| 764 | # The appended tag is determinded by the SCM used. |
| 765 | # |
| 766 | # Currently, only git is supported. |
| 767 | # Other SCMs can edit scripts/setlocalversion and add the appropriate |
| 768 | # checks as needed. |
| 769 | ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO |
| 770 | _localver-auto = $(shell $(CONFIG_SHELL) \ |
| 771 | $(srctree)/scripts/setlocalversion $(srctree)) |
| 772 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
| 773 | endif |
| 774 | |
| 775 | localver-full = $(localver)$(localver-auto) |
| 776 | |
| 777 | # Store (new) KERNELRELASE string in .kernelrelease |
| 778 | kernelrelease = $(KERNELVERSION)$(localver-full) |
| 779 | .kernelrelease: FORCE |
| 780 | $(Q)rm -f $@ |
| 781 | $(Q)echo $(kernelrelease) > $@ |
| 782 | |
| 783 | |
| 784 | # Things we need to do before we recursively start building the kernel |
| 785 | # or the modules are listed in "prepare". |
| 786 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| 787 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| 788 | # version.h and scripts_basic is processed / created. |
| 789 | |
| 790 | # Listed in dependency order |
| 791 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
| 792 | |
| 793 | # prepare-all is deprecated, use prepare as valid replacement |
| 794 | PHONY += prepare-all |
| 795 | |
| 796 | # prepare3 is used to check if we are building in a separate output directory, |
| 797 | # and if so do: |
| 798 | # 1) Check that make has not been executed in the kernel src $(srctree) |
| 799 | # 2) Create the include2 directory, used for the second asm symlink |
| 800 | prepare3: .kernelrelease |
| 801 | ifneq ($(KBUILD_SRC),) |
| 802 | @echo ' Using $(srctree) as source for busybox' |
| 803 | $(Q)if [ -f $(srctree)/.config ]; then \ |
| 804 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
| 805 | echo " in the '$(srctree)' directory.";\ |
| 806 | /bin/false; \ |
| 807 | fi; |
| 808 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; |
| 809 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm |
| 810 | endif |
| 811 | |
| 812 | # prepare2 creates a makefile if using a separate output directory |
| 813 | prepare2: prepare3 outputmakefile |
| 814 | |
| 815 | prepare1: prepare2 include/config/MARKER |
| 816 | ifneq ($(KBUILD_MODULES),) |
| 817 | $(Q)mkdir -p $(MODVERDIR) |
| 818 | $(Q)rm -f $(MODVERDIR)/* |
| 819 | endif |
| 820 | |
| 821 | archprepare: prepare1 scripts_basic applets_dir |
| 822 | |
| 823 | prepare0: archprepare FORCE |
| 824 | $(Q)$(MAKE) $(build)=. |
| 825 | |
| 826 | # All the preparing.. |
| 827 | prepare prepare-all: prepare0 |
| 828 | |
| 829 | # Leave this as default for preprocessing busybox.lds.S, which is now |
| 830 | # done in arch/$(ARCH)/kernel/Makefile |
| 831 | |
| 832 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) |
| 833 | |
| 834 | # FIXME: The asm symlink changes when $(ARCH) changes. That's |
| 835 | # hard to detect, but I suppose "make mrproper" is a good idea |
| 836 | # before switching between archs anyway. |
| 837 | |
| 838 | #bbox# include/asm: |
| 839 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' |
| 840 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; |
| 841 | #bbox# @ln -fsn asm-$(ARCH) $@ |
| 842 | |
| 843 | # Split autoconf.h into include/linux/config/* |
| 844 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h |
| 845 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h |
| 846 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* |
| 847 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config |
| 848 | #bbox# piggybacked generation of few .h files |
| 849 | include/config/MARKER: scripts/basic/split-include include/autoconf.h |
| 850 | $(call cmd,split_autoconf) |
| 851 | $(call cmd,gen_bbconfigopts) |
| 852 | @touch $@ |
| 853 | |
| 854 | # Generate some files |
| 855 | # --------------------------------------------------------------------------- |
| 856 | |
| 857 | # KERNELRELEASE can change from a few different places, meaning version.h |
| 858 | # needs to be updated, so this check is forced on all builds |
| 859 | |
| 860 | uts_len := 64 |
| 861 | |
| 862 | define filechk_version.h |
| 863 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| 864 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| 865 | exit 1; \ |
| 866 | fi; \ |
| 867 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ |
| 868 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ |
| 869 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ |
| 870 | ) |
| 871 | endef |
| 872 | |
| 873 | # --------------------------------------------------------------------------- |
| 874 | |
| 875 | PHONY += depend dep |
| 876 | depend dep: |
| 877 | @echo '*** Warning: make $@ is unnecessary now.' |
| 878 | |
| 879 | # --------------------------------------------------------------------------- |
| 880 | # Modules |
| 881 | |
| 882 | ifdef _BB_DISABLED_CONFIG_MODULES |
| 883 | |
| 884 | # By default, build modules as well |
| 885 | |
| 886 | all: modules |
| 887 | |
| 888 | # Build modules |
| 889 | |
| 890 | PHONY += modules |
| 891 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) |
| 892 | @echo ' Building modules, stage 2.'; |
| 893 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
| 894 | |
| 895 | |
| 896 | # Target to prepare building external modules |
| 897 | PHONY += modules_prepare |
| 898 | modules_prepare: prepare scripts |
| 899 | |
| 900 | # Target to install modules |
| 901 | PHONY += modules_install |
| 902 | modules_install: _modinst_ _modinst_post |
| 903 | |
| 904 | PHONY += _modinst_ |
| 905 | _modinst_: |
| 906 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
| 907 | echo "Warning: you may need to install module-init-tools"; \ |
| 908 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ |
| 909 | sleep 1; \ |
| 910 | fi |
| 911 | @rm -rf $(MODLIB)/kernel |
| 912 | @rm -f $(MODLIB)/source |
| 913 | @mkdir -p $(MODLIB)/kernel |
| 914 | @ln -s $(srctree) $(MODLIB)/source |
| 915 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| 916 | rm -f $(MODLIB)/build ; \ |
| 917 | ln -s $(objtree) $(MODLIB)/build ; \ |
| 918 | fi |
| 919 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
| 920 | |
| 921 | # If System.map exists, run depmod. This deliberately does not have a |
| 922 | # dependency on System.map since that would run the dependency tree on |
| 923 | # busybox. This depmod is only for convenience to give the initial |
| 924 | # boot a modules.dep even before / is mounted read-write. However the |
| 925 | # boot script depmod is the master version. |
| 926 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" |
| 927 | depmod_opts := |
| 928 | else |
| 929 | depmod_opts := -b $(INSTALL_MOD_PATH) -r |
| 930 | endif |
| 931 | PHONY += _modinst_post |
| 932 | _modinst_post: _modinst_ |
| 933 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi |
| 934 | |
| 935 | else # CONFIG_MODULES |
| 936 | |
| 937 | # Modules not configured |
| 938 | # --------------------------------------------------------------------------- |
| 939 | |
| 940 | modules modules_install: FORCE |
| 941 | @echo |
| 942 | @echo "The present busybox configuration has modules disabled." |
| 943 | @echo "Type 'make config' and enable loadable module support." |
| 944 | @echo "Then build a kernel with module support enabled." |
| 945 | @echo |
| 946 | @exit 1 |
| 947 | |
| 948 | endif # CONFIG_MODULES |
| 949 | |
| 950 | ### |
| 951 | # Cleaning is done on three levels. |
| 952 | # make clean Delete most generated files |
| 953 | # Leave enough to build external modules |
| 954 | # make mrproper Delete the current configuration, and all generated files |
| 955 | # make distclean Remove editor backup files, patch leftover files and the like |
| 956 | |
| 957 | # Directories & files removed with 'make clean' |
| 958 | CLEAN_DIRS += $(MODVERDIR) _install 0_lib |
| 959 | CLEAN_FILES += busybox busybox_unstripped* busybox.links \ |
| 960 | System.map .kernelrelease \ |
| 961 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map |
| 962 | |
| 963 | # Directories & files removed with 'make mrproper' |
| 964 | MRPROPER_DIRS += include/config include2 |
| 965 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
| 966 | include/autoconf.h \ |
| 967 | include/bbconfigopts.h \ |
| 968 | include/usage_compressed.h \ |
| 969 | include/applet_tables.h \ |
| 970 | applets/usage \ |
| 971 | .kernelrelease Module.symvers tags TAGS cscope* \ |
| 972 | busybox_old |
| 973 | |
| 974 | # clean - Delete most, but leave enough to build external modules |
| 975 | # |
| 976 | clean: rm-dirs := $(CLEAN_DIRS) |
| 977 | clean: rm-files := $(CLEAN_FILES) |
| 978 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) |
| 979 | |
| 980 | PHONY += $(clean-dirs) clean archclean |
| 981 | $(clean-dirs): |
| 982 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| 983 | |
| 984 | clean: archclean $(clean-dirs) |
| 985 | $(call cmd,rmdirs) |
| 986 | $(call cmd,rmfiles) |
| 987 | @find . $(RCS_FIND_IGNORE) \ |
| 988 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
| 989 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
| 990 | -type f -print | xargs rm -f |
| 991 | |
| 992 | PHONY += doc-clean |
| 993 | doc-clean: rm-files := docs/busybox.pod \ |
| 994 | docs/BusyBox.html docs/BusyBox.1 docs/BusyBox.txt |
| 995 | doc-clean: |
| 996 | $(call cmd,rmfiles) |
| 997 | |
| 998 | # mrproper - Delete all generated files, including .config |
| 999 | # |
| 1000 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| 1001 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| 1002 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
| 1003 | |
| 1004 | PHONY += $(mrproper-dirs) mrproper archmrproper |
| 1005 | $(mrproper-dirs): |
| 1006 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| 1007 | |
| 1008 | mrproper: clean archmrproper $(mrproper-dirs) |
| 1009 | $(call cmd,rmdirs) |
| 1010 | $(call cmd,rmfiles) |
| 1011 | @find -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f |
| 1012 | @find -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f |
| 1013 | |
| 1014 | # distclean |
| 1015 | # |
| 1016 | PHONY += distclean |
| 1017 | |
| 1018 | distclean: mrproper |
| 1019 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
| 1020 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| 1021 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
| 1022 | -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \ |
| 1023 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
| 1024 | -type f -print | xargs rm -f |
| 1025 | |
| 1026 | |
| 1027 | # Packaging of the kernel to various formats |
| 1028 | # --------------------------------------------------------------------------- |
| 1029 | # rpm target kept for backward compatibility |
| 1030 | package-dir := $(srctree)/scripts/package |
| 1031 | |
| 1032 | %pkg: FORCE |
| 1033 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| 1034 | rpm: FORCE |
| 1035 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| 1036 | |
| 1037 | |
| 1038 | # Brief documentation of the typical targets used |
| 1039 | # --------------------------------------------------------------------------- |
| 1040 | |
| 1041 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) |
| 1042 | boards := $(notdir $(boards)) |
| 1043 | |
| 1044 | -include $(srctree)/Makefile.help |
| 1045 | |
| 1046 | # Documentation targets |
| 1047 | # --------------------------------------------------------------------------- |
| 1048 | %docs: scripts_basic FORCE |
| 1049 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
| 1050 | |
| 1051 | else # KBUILD_EXTMOD |
| 1052 | |
| 1053 | ### |
| 1054 | # External module support. |
| 1055 | # When building external modules the kernel used as basis is considered |
| 1056 | # read-only, and no consistency checks are made and the make |
| 1057 | # system is not used on the basis kernel. If updates are required |
| 1058 | # in the basis kernel ordinary make commands (without M=...) must |
| 1059 | # be used. |
| 1060 | # |
| 1061 | # The following are the only valid targets when building external |
| 1062 | # modules. |
| 1063 | # make M=dir clean Delete all automatically generated files |
| 1064 | # make M=dir modules Make all modules in specified dir |
| 1065 | # make M=dir Same as 'make M=dir modules' |
| 1066 | # make M=dir modules_install |
| 1067 | # Install the modules build in the module directory |
| 1068 | # Assumes install directory is already created |
| 1069 | |
| 1070 | # We are always building modules |
| 1071 | KBUILD_MODULES := 1 |
| 1072 | PHONY += crmodverdir |
| 1073 | crmodverdir: |
| 1074 | $(Q)mkdir -p $(MODVERDIR) |
| 1075 | $(Q)rm -f $(MODVERDIR)/* |
| 1076 | |
| 1077 | PHONY += $(objtree)/Module.symvers |
| 1078 | $(objtree)/Module.symvers: |
| 1079 | @test -e $(objtree)/Module.symvers || ( \ |
| 1080 | echo; \ |
| 1081 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
| 1082 | echo " is missing; modules will have no dependencies and modversions."; \ |
| 1083 | echo ) |
| 1084 | |
| 1085 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
| 1086 | PHONY += $(module-dirs) modules |
| 1087 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
| 1088 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
| 1089 | |
| 1090 | modules: $(module-dirs) |
| 1091 | @echo ' Building modules, stage 2.'; |
| 1092 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
| 1093 | |
| 1094 | PHONY += modules_install |
| 1095 | modules_install: _emodinst_ _emodinst_post |
| 1096 | |
| 1097 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
| 1098 | PHONY += _emodinst_ |
| 1099 | _emodinst_: |
| 1100 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
| 1101 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
| 1102 | |
| 1103 | # Run depmod only is we have System.map and depmod is executable |
| 1104 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| 1105 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ |
| 1106 | $(DEPMOD) -ae -F System.map \ |
| 1107 | $(if $(strip $(INSTALL_MOD_PATH)), \ |
| 1108 | -b $(INSTALL_MOD_PATH) -r) \ |
| 1109 | $(KERNELRELEASE); \ |
| 1110 | fi |
| 1111 | |
| 1112 | PHONY += _emodinst_post |
| 1113 | _emodinst_post: _emodinst_ |
| 1114 | $(call cmd,depmod) |
| 1115 | |
| 1116 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
| 1117 | |
| 1118 | PHONY += $(clean-dirs) clean |
| 1119 | $(clean-dirs): |
| 1120 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| 1121 | |
| 1122 | clean: rm-dirs := $(MODVERDIR) |
| 1123 | clean: $(clean-dirs) |
| 1124 | $(call cmd,rmdirs) |
| 1125 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
| 1126 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
| 1127 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
| 1128 | -type f -print | xargs rm -f |
| 1129 | |
| 1130 | help: |
| 1131 | @echo ' Building external modules.' |
| 1132 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| 1133 | @echo '' |
| 1134 | @echo ' modules - default target, build the module(s)' |
| 1135 | @echo ' modules_install - install the module' |
| 1136 | @echo ' clean - remove generated files in module directory only' |
| 1137 | @echo '' |
| 1138 | |
| 1139 | # Dummies... |
| 1140 | PHONY += prepare scripts |
| 1141 | prepare: ; |
| 1142 | scripts: ; |
| 1143 | endif # KBUILD_EXTMOD |
| 1144 | |
| 1145 | # Generate tags for editors |
| 1146 | # --------------------------------------------------------------------------- |
| 1147 | |
| 1148 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set |
| 1149 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. |
| 1150 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! |
| 1151 | |
| 1152 | ifeq ($(src),$(obj)) |
| 1153 | __srctree = |
| 1154 | else |
| 1155 | __srctree = $(srctree)/ |
| 1156 | endif |
| 1157 | |
| 1158 | ifeq ($(ALLSOURCE_ARCHS),) |
| 1159 | ifeq ($(ARCH),um) |
| 1160 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) |
| 1161 | else |
| 1162 | ALLINCLUDE_ARCHS := $(ARCH) |
| 1163 | endif |
| 1164 | else |
| 1165 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. |
| 1166 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
| 1167 | endif |
| 1168 | |
| 1169 | ALLSOURCE_ARCHS := $(ARCH) |
| 1170 | |
| 1171 | define all-sources |
| 1172 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ |
| 1173 | \( -name include -o -name arch \) -prune -o \ |
| 1174 | -name '*.[chS]' -print; \ |
| 1175 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ |
| 1176 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ |
| 1177 | -name '*.[chS]' -print; \ |
| 1178 | done ; \ |
| 1179 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
| 1180 | -name '*.[chS]' -print; \ |
| 1181 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
| 1182 | \( -name config -o -name 'asm-*' \) -prune \ |
| 1183 | -o -name '*.[chS]' -print; \ |
| 1184 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ |
| 1185 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ |
| 1186 | -name '*.[chS]' -print; \ |
| 1187 | done ; \ |
| 1188 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
| 1189 | -name '*.[chS]' -print ) |
| 1190 | endef |
| 1191 | |
| 1192 | quiet_cmd_cscope-file = FILELST cscope.files |
| 1193 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
| 1194 | |
| 1195 | quiet_cmd_cscope = MAKE cscope.out |
| 1196 | cmd_cscope = cscope -b |
| 1197 | |
| 1198 | cscope: FORCE |
| 1199 | $(call cmd,cscope-file) |
| 1200 | $(call cmd,cscope) |
| 1201 | |
| 1202 | quiet_cmd_TAGS = MAKE $@ |
| 1203 | define cmd_TAGS |
| 1204 | rm -f $@; \ |
| 1205 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
| 1206 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
| 1207 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
| 1208 | --extra=+f --c-kinds=+px"`; \ |
| 1209 | $(all-sources) | xargs etags $$ETAGSF -a |
| 1210 | endef |
| 1211 | |
| 1212 | TAGS: FORCE |
| 1213 | $(call cmd,TAGS) |
| 1214 | |
| 1215 | |
| 1216 | quiet_cmd_tags = MAKE $@ |
| 1217 | define cmd_tags |
| 1218 | rm -f $@; \ |
| 1219 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
| 1220 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
| 1221 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
| 1222 | --extra=+f --c-kinds=+px"`; \ |
| 1223 | $(all-sources) | xargs ctags $$CTAGSF -a |
| 1224 | endef |
| 1225 | |
| 1226 | tags: FORCE |
| 1227 | $(call cmd,tags) |
| 1228 | |
| 1229 | |
| 1230 | # Scripts to check various things for consistency |
| 1231 | # --------------------------------------------------------------------------- |
| 1232 | |
| 1233 | includecheck: |
| 1234 | find * $(RCS_FIND_IGNORE) \ |
| 1235 | -name '*.[hcS]' -type f -print | sort \ |
| 1236 | | xargs $(PERL) -w scripts/checkincludes.pl |
| 1237 | |
| 1238 | versioncheck: |
| 1239 | find * $(RCS_FIND_IGNORE) \ |
| 1240 | -name '*.[hcS]' -type f -print | sort \ |
| 1241 | | xargs $(PERL) -w scripts/checkversion.pl |
| 1242 | |
| 1243 | namespacecheck: |
| 1244 | $(PERL) $(srctree)/scripts/namespace.pl |
| 1245 | |
| 1246 | endif #ifeq ($(config-targets),1) |
| 1247 | endif #ifeq ($(mixed-targets),1) |
| 1248 | |
| 1249 | PHONY += checkstack |
| 1250 | checkstack: |
| 1251 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ |
| 1252 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) |
| 1253 | |
| 1254 | kernelrelease: |
| 1255 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ |
| 1256 | $(error kernelrelease not valid - run 'make *config' to update it)) |
| 1257 | kernelversion: |
| 1258 | @echo $(KERNELVERSION) |
| 1259 | |
| 1260 | # Single targets |
| 1261 | # --------------------------------------------------------------------------- |
| 1262 | # Single targets are compatible with: |
| 1263 | # - build whith mixed source and output |
| 1264 | # - build with separate output dir 'make O=...' |
| 1265 | # - external modules |
| 1266 | # |
| 1267 | # target-dir => where to store outputfile |
| 1268 | # build-dir => directory in kernel source tree to use |
| 1269 | |
| 1270 | ifeq ($(KBUILD_EXTMOD),) |
| 1271 | build-dir = $(patsubst %/,%,$(dir $@)) |
| 1272 | target-dir = $(dir $@) |
| 1273 | else |
| 1274 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
| 1275 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
| 1276 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
| 1277 | endif |
| 1278 | |
| 1279 | %.s: %.c prepare scripts FORCE |
| 1280 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1281 | %.i: %.c prepare scripts FORCE |
| 1282 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1283 | %.o: %.c prepare scripts FORCE |
| 1284 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1285 | %.lst: %.c prepare scripts FORCE |
| 1286 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1287 | %.s: %.S prepare scripts FORCE |
| 1288 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1289 | %.o: %.S prepare scripts FORCE |
| 1290 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1291 | |
| 1292 | # Modules |
| 1293 | %/: prepare scripts FORCE |
| 1294 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1295 | $(build)=$(build-dir) |
| 1296 | |
| 1297 | /: prepare scripts FORCE |
| 1298 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1299 | $(build)=$(build-dir) |
| 1300 | %.ko: prepare scripts FORCE |
| 1301 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1302 | $(build)=$(build-dir) $(@:.ko=.o) |
| 1303 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
| 1304 | |
| 1305 | # FIXME Should go into a make.lib or something |
| 1306 | # =========================================================================== |
| 1307 | |
| 1308 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| 1309 | cmd_rmdirs = rm -rf $(rm-dirs) |
| 1310 | |
| 1311 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| 1312 | cmd_rmfiles = rm -f $(rm-files) |
| 1313 | |
| 1314 | |
| 1315 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ |
| 1316 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ |
| 1317 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) |
| 1318 | |
| 1319 | quiet_cmd_as_o_S = AS $@ |
| 1320 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 1321 | |
| 1322 | # read all saved command lines |
| 1323 | |
| 1324 | targets := $(wildcard $(sort $(targets))) |
| 1325 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| 1326 | |
| 1327 | ifneq ($(cmd_files),) |
| 1328 | $(cmd_files): ; # Do not try to update included dependency files |
| 1329 | include $(cmd_files) |
| 1330 | endif |
| 1331 | |
| 1332 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
| 1333 | # Usage: |
| 1334 | # $(Q)$(MAKE) $(clean)=dir |
| 1335 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
| 1336 | |
| 1337 | endif # skip-makefile |
| 1338 | |
| 1339 | PHONY += FORCE |
| 1340 | FORCE: |
| 1341 | |
| 1342 | -include $(srctree)/Makefile.custom |
| 1343 | |
| 1344 | # Declare the contents of the .PHONY variable as phony. We keep that |
| 1345 | # information in a variable se we can use it in if_changed and friends. |
| 1346 | .PHONY: $(PHONY) |