2 # (C) Copyright 2000-2013
5 # SPDX-License-Identifier: GPL-2.0+
15 # To see a list of typical targets execute "make help"
16 # More info can be located in ./README
17 # Comments in this file are targeted only to the developer, do not
18 # expect to learn how to build the kernel reading this file.
21 # o use make's built-in rules and variables
22 # (this increases performance and avoids hard-to-debug behaviour);
23 # o print "Entering directory ...";
24 MAKEFLAGS += -rR --no-print-directory
26 # Avoid funny character set dependencies
30 export LC_COLLATE LC_NUMERIC
32 # We are using a recursive build, so we need to do a little thinking
33 # to get the ordering right.
35 # Most importantly: sub-Makefiles should only ever modify files in
36 # their own directory. If in some directory we have a dependency on
37 # a file in another dir (which doesn't happen often, but it's often
38 # unavoidable when linking the built-in.o targets which finally
39 # turn into vmlinux), we will call a sub make in that other dir, and
40 # after that we are sure that everything which is in that other dir
43 # The only cases where we need to modify files which have global
44 # effects are thus separated out and done before the recursive
45 # descending is started. They are now explicitly listed as the
48 # To put more focus on warnings, be less verbose as default
49 # Use 'make V=1' to see the full commands
51 ifeq ("$(origin V)", "command line")
58 # Call a source code checker (by default, "sparse") as part of the
61 # Use 'make C=1' to enable checking of only re-compiled files.
62 # Use 'make C=2' to enable checking of *all* source files, regardless
63 # of whether they are re-compiled or not.
65 # See the file "Documentation/sparse.txt" for more details, including
66 # where to get the "sparse" utility.
68 ifeq ("$(origin C)", "command line")
69 KBUILD_CHECKSRC = $(C)
71 ifndef KBUILD_CHECKSRC
75 # Use make M=dir to specify directory of external module to build
76 # Old syntax make ... SUBDIRS=$PWD is still supported
77 # Setting the environment variable KBUILD_EXTMOD take precedence
79 KBUILD_EXTMOD ?= $(SUBDIRS)
82 ifeq ("$(origin M)", "command line")
86 # kbuild supports saving output files in a separate directory.
87 # To locate output files in a separate directory two syntaxes are supported.
88 # In both cases the working directory must be the root of the kernel src.
90 # Use "make O=dir/to/store/output/files/"
92 # 2) Set KBUILD_OUTPUT
93 # Set the environment variable KBUILD_OUTPUT to point to the directory
94 # where the output files shall be placed.
95 # export KBUILD_OUTPUT=dir/to/store/output/files/
98 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
102 # KBUILD_SRC is set on invocation of make in OBJ directory
103 # KBUILD_SRC is not intended to be used by the regular user (for now)
104 ifeq ($(KBUILD_SRC),)
106 # OK, Make called in directory where kernel src resides
107 # Do we want to locate output files in a separate directory?
108 ifeq ("$(origin O)", "command line")
109 KBUILD_OUTPUT := $(O)
112 ifeq ("$(origin W)", "command line")
113 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
116 # That's our default target when none is given on the command line
120 # Cancel implicit rules on top Makefile
121 $(CURDIR)/Makefile Makefile: ;
123 ifneq ($(KBUILD_OUTPUT),)
124 # Invoke a second make in the output directory, passing relevant variables
125 # check that the output directory actually exists
126 saved-output := $(KBUILD_OUTPUT)
127 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
128 $(if $(KBUILD_OUTPUT),, \
129 $(error output directory "$(saved-output)" does not exist))
131 PHONY += $(MAKECMDGOALS) sub-make
133 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
137 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
138 KBUILD_SRC=$(CURDIR) \
139 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
140 $(filter-out _all sub-make,$(MAKECMDGOALS))
142 # Leave processing to above invocation of make
144 endif # ifneq ($(KBUILD_OUTPUT),)
145 endif # ifeq ($(KBUILD_SRC),)
147 # We process the rest of the Makefile if this is the final invocation of make
148 ifeq ($(skip-makefile),)
150 # If building an external module we do not care about the all: rule
151 # but instead _all depend on modules
153 ifeq ($(KBUILD_EXTMOD),)
159 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
164 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
166 export srctree objtree VPATH
168 OBJTREE := $(objtree)
169 SPLTREE := $(OBJTREE)/spl
170 TPLTREE := $(OBJTREE)/tpl
171 SRCTREE := $(srctree)
173 export TOPDIR SRCTREE OBJTREE SPLTREE TPLTREE
175 MKCONFIG := $(SRCTREE)/mkconfig
178 # Make sure CDPATH settings don't interfere
181 #########################################################################
183 TIMESTAMP_FILE = include/generated/timestamp_autogenerated.h
184 VERSION_FILE = include/generated/version_autogenerated.h
186 HOSTARCH := $(shell uname -m | \
188 -e s/sun4u/sparc64/ \
191 -e s/ppc64/powerpc/ \
193 -e s/macppc/powerpc/\
196 HOSTOS := $(shell uname -s | tr '[:upper:]' '[:lower:]' | \
197 sed -e 's/\(cygwin\).*/cygwin/')
199 export HOSTARCH HOSTOS
201 # Deal with colliding definitions from tcsh etc.
204 #########################################################################
206 # set default to nothing for native builds
207 ifeq ($(HOSTARCH),$(ARCH))
211 # SHELL used by kbuild
212 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
213 else if [ -x /bin/bash ]; then echo /bin/bash; \
214 else echo sh; fi ; fi)
217 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
219 ifeq ($(HOSTOS),cygwin)
223 # Mac OS X / Darwin's C preprocessor is Apple specific. It
224 # generates numerous errors and warnings. We want to bypass it
225 # and use GNU C's cpp. To do this we pass the -traditional-cpp
226 # option to the compiler. Note that the -traditional-cpp flag
227 # DOES NOT have the same semantics as GNU C's flag, all it does
228 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
230 # Apple's linker is similar, thanks to the new 2 stage linking
231 # multiple symbol definitions are treated as errors, hence the
232 # -multiply_defined suppress option to turn off this error.
234 ifeq ($(HOSTOS),darwin)
235 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
236 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
237 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
239 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
240 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
242 # Snow Leopards build environment has no longer restrictions as described above
243 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
244 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
245 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
248 # Decide whether to build built-in, modular, or both.
249 # Normally, just do built-in.
254 # If we have only "make modules", don't compile built-in objects.
255 # When we're building modules with modversions, we need to consider
256 # the built-in objects during the descend as well, in order to
257 # make sure the checksums are up to date before we record them.
259 ifeq ($(MAKECMDGOALS),modules)
260 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
263 # If we have "make <whatever> modules", compile modules
264 # in addition to whatever we do anyway.
265 # Just "make" or "make all" shall build modules as well
267 # U-Boot does not need modules
268 #ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
269 # KBUILD_MODULES := 1
272 #ifeq ($(MAKECMDGOALS),)
273 # KBUILD_MODULES := 1
276 export KBUILD_MODULES KBUILD_BUILTIN
277 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
280 # ---------------------------------------------------------------------------
282 # Normally, we echo the whole command before executing it. By making
283 # that echo $($(quiet)$(cmd)), we now have the possibility to set
284 # $(quiet) to choose other forms of output instead, e.g.
286 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
287 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
289 # If $(quiet) is empty, the whole command will be printed.
290 # If it is set to "quiet_", only the short version will be printed.
291 # If it is set to "silent_", nothing will be printed at all, since
292 # the variable $(silent_cmd_cc_o_c) doesn't exist.
294 # A simple variant is to prefix commands with $(Q) - that's useful
295 # for commands that shall be hidden in non-verbose mode.
299 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
300 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
302 ifeq ($(KBUILD_VERBOSE),1)
310 # If the user is running make -s (silent mode), suppress echoing of
313 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
317 export quiet Q KBUILD_VERBOSE
320 # Look for make include files relative to root of kernel src
321 MAKEFLAGS += --include-dir=$(srctree)
323 # We need some generic definitions (do not try to remake the file).
324 $(srctree)/scripts/Kbuild.include: ;
325 include $(srctree)/scripts/Kbuild.include
327 # Make variables (CC, etc...)
329 AS = $(CROSS_COMPILE)as
331 ifneq ($(shell $(CROSS_COMPILE)ld.bfd -v 2> /dev/null),)
332 LD = $(CROSS_COMPILE)ld.bfd
334 LD = $(CROSS_COMPILE)ld
336 CC = $(CROSS_COMPILE)gcc
338 AR = $(CROSS_COMPILE)ar
339 NM = $(CROSS_COMPILE)nm
340 LDR = $(CROSS_COMPILE)ldr
341 STRIP = $(CROSS_COMPILE)strip
342 OBJCOPY = $(CROSS_COMPILE)objcopy
343 OBJDUMP = $(CROSS_COMPILE)objdump
345 RANLIB = $(CROSS_COMPILE)RANLIB
349 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
350 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
352 KBUILD_CPPFLAGS := -D__KERNEL__
354 KBUILD_CFLAGS := -Wall -Wstrict-prototypes \
355 -Wno-format-security \
356 -fno-builtin -ffreestanding
357 KBUILD_AFLAGS := -D__ASSEMBLY__
359 U_BOOT_VERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
361 export VERSION PATCHLEVEL SUBLEVEL U_BOOT_VERSION
362 export ARCH CPU BOARD VENDOR SOC
363 export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
364 export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
366 export DTC CHECK CHECKFLAGS
368 export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE
369 export KBUILD_CFLAGS KBUILD_AFLAGS
371 # When compiling out-of-tree modules, put MODVERDIR in the module
372 # tree rather than in the kernel tree. The kernel tree might
374 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
376 # Files to ignore in find ... statements
378 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
379 -o -name .pc -o -name .hg -o -name .git \) -prune -o
380 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
381 --exclude CVS --exclude .pc --exclude .hg --exclude .git
383 # ===========================================================================
384 # Rules shared between *config targets and build targets
386 # Basic helpers built in scripts/
387 PHONY += scripts_basic
389 $(Q)$(MAKE) $(build)=scripts/basic
390 $(Q)rm -f .tmp_quiet_recordmcount
392 # To avoid any implicit rule to kick in, define an empty command.
393 scripts/basic/%: scripts_basic ;
395 PHONY += outputmakefile
396 # outputmakefile generates a Makefile in the output directory, if using a
397 # separate output directory. This allows convenient use of make in the
400 ifneq ($(KBUILD_SRC),)
401 $(Q)ln -fsn $(srctree) source
402 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
403 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
406 # To make sure we do not include .config for any of the *config targets
407 # catch them early, and hand them over to scripts/kconfig/Makefile
408 # It is allowed to specify more targets when calling make, including
409 # mixing *config targets and build targets.
410 # For example 'make oldconfig all'.
411 # Detect when mixed targets is specified, and make a second invocation
412 # of make so .config is not included in this case either (for *config).
414 no-dot-config-targets := clean clobber mrproper distclean \
415 cscope TAGS %tags help %docs check% coccicheck \
422 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
423 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
428 ifeq ($(KBUILD_EXTMOD),)
429 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
431 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
437 ifeq ($(mixed-targets),1)
438 # ===========================================================================
439 # We're called with mixed targets (*config and build targets).
440 # Handle them one by one.
442 PHONY += $(MAKECMDGOALS) build-one-by-one
444 $(MAKECMDGOALS): build-one-by-one
449 for i in $(MAKECMDGOALS); do \
450 $(MAKE) -f $(srctree)/Makefile $$i; \
454 ifeq ($(config-targets),1)
455 # ===========================================================================
456 # *config targets only - make sure prerequisites are updated, and descend
457 # in scripts/kconfig to make the *config target
459 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
460 # KBUILD_DEFCONFIG may point out an alternative default configuration
461 # used for 'make defconfig'
463 %_config:: outputmakefile
464 @$(MKCONFIG) -A $(@:_config=)
467 # ===========================================================================
468 # Build targets only - this includes vmlinux, arch specific targets, clean
469 # targets and others. In general all targets except *config targets.
471 # load ARCH, BOARD, and CPU configuration
472 -include include/config.mk
474 ifeq ($(dot-config),1)
476 -include include/autoconf.mk
477 -include include/autoconf.mk.dep
479 # load other configuration
480 include $(srctree)/config.mk
482 ifeq ($(wildcard include/config.mk),)
483 $(error "System not configured - see README")
486 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
487 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
488 $(error Your architecture does not support generic board. \
489 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
493 # If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
494 # that (or fail if absent). Otherwise, search for a linker script in a
497 LDSCRIPT_MAKEFILE_DIR = $(dir $(LDSCRIPT))
500 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
501 ifdef CONFIG_SYS_LDSCRIPT
502 # need to strip off double quotes
503 LDSCRIPT := $(CONFIG_SYS_LDSCRIPT:"%"=%)
507 # If there is no specified link script, we look in a number of places for it
509 ifeq ($(CONFIG_NAND_U_BOOT),y)
510 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
511 ifeq ($(wildcard $(LDSCRIPT)),)
512 LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-nand.lds
515 ifeq ($(wildcard $(LDSCRIPT)),)
516 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
518 ifeq ($(wildcard $(LDSCRIPT)),)
519 LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot.lds
521 ifeq ($(wildcard $(LDSCRIPT)),)
522 LDSCRIPT := $(TOPDIR)/arch/$(ARCH)/cpu/u-boot.lds
523 # We don't expect a Makefile here
524 LDSCRIPT_MAKEFILE_DIR =
526 ifeq ($(wildcard $(LDSCRIPT)),)
527 $(error could not find linker script)
534 endif # $(dot-config)
536 KBUILD_CFLAGS += -Os #-fomit-frame-pointer
539 KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
542 KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
545 # $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
546 # option to the assembler.
549 # Report stack usage if supported
550 KBUILD_CFLAGS += $(call cc-option,-fstack-usage)
552 KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
554 # turn jbsr into jsr for m68k
556 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
557 KBUILD_AFLAGS += -Wa,-gstabs,-S
561 ifneq ($(CONFIG_SYS_TEXT_BASE),)
562 KBUILD_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
565 export CONFIG_SYS_TEXT_BASE
567 # Use UBOOTINCLUDE when you must reference the include/ directory.
568 # Needed to be compatible with the O= option
570 ifneq ($(OBJTREE),$(SRCTREE))
571 UBOOTINCLUDE += -I$(OBJTREE)/include
573 UBOOTINCLUDE += -I$(srctree)/include \
574 -I$(srctree)/arch/$(ARCH)/include
576 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
577 CHECKFLAGS += $(NOSTDINC_FLAGS)
580 cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
581 c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
583 .PHONY : $(VERSION_FILE) $(TIMESTAMP_FILE)
585 #########################################################################
586 # U-Boot objects....order is important (i.e. start must be first)
588 head-y := $(CPUDIR)/start.o
589 head-$(CONFIG_4xx) += arch/powerpc/cpu/ppc4xx/resetvec.o
590 head-$(CONFIG_MPC85xx) += arch/powerpc/cpu/mpc85xx/resetvec.o
592 HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)
595 libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
598 libs-y += $(CPUDIR)/$(SOC)/
600 libs-$(CONFIG_IXP4XX_NPE) += drivers/net/npe/
601 libs-$(CONFIG_OF_EMBED) += dts/
602 libs-y += arch/$(ARCH)/lib/
607 libs-y += drivers/dma/
608 libs-y += drivers/gpio/
609 libs-y += drivers/i2c/
610 libs-y += drivers/input/
611 libs-y += drivers/mmc/
612 libs-y += drivers/mtd/
613 libs-$(CONFIG_CMD_NAND) += drivers/mtd/nand/
614 libs-y += drivers/mtd/onenand/
615 libs-$(CONFIG_CMD_UBI) += drivers/mtd/ubi/
616 libs-y += drivers/mtd/spi/
617 libs-y += drivers/net/
618 libs-y += drivers/net/phy/
619 libs-y += drivers/pci/
620 libs-y += drivers/power/ \
621 drivers/power/fuel_gauge/ \
623 drivers/power/pmic/ \
624 drivers/power/battery/
625 libs-y += drivers/spi/
626 libs-$(CONFIG_FMAN_ENET) += drivers/net/fm/
627 libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/
628 libs-y += drivers/serial/
629 libs-y += drivers/usb/eth/
630 libs-y += drivers/usb/gadget/
631 libs-y += drivers/usb/host/
632 libs-y += drivers/usb/musb/
633 libs-y += drivers/usb/musb-new/
634 libs-y += drivers/usb/phy/
635 libs-y += drivers/usb/ulpi/
637 libs-y += lib/libfdt/
638 libs-$(CONFIG_API) += api/
639 libs-$(CONFIG_HAS_POST) += post/
642 ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35 mxs vf610))
643 libs-y += arch/$(ARCH)/imx-common/
646 libs-$(CONFIG_ARM) += arch/arm/cpu/
647 libs-$(CONFIG_PPC) += arch/powerpc/cpu/
649 libs-y += board/$(BOARDDIR)/
651 libs-y := $(sort $(libs-y))
653 u-boot-dirs := $(patsubst %/,%,$(filter %/, $(libs-y))) tools examples
655 u-boot-alldirs := $(sort $(u-boot-dirs) $(patsubst %/,%,$(filter %/, $(libs-))))
657 libs-y := $(patsubst %/, %/built-in.o, $(libs-y))
659 u-boot-init := $(head-y)
660 u-boot-main := $(libs-y)
664 ifdef USE_PRIVATE_LIBGCC
665 ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")
666 PLATFORM_LIBGCC = $(OBJTREE)/arch/$(ARCH)/lib/lib.a
668 PLATFORM_LIBGCC = -L $(USE_PRIVATE_LIBGCC) -lgcc
671 PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(c_flags) -print-libgcc-file-name`) -lgcc
673 PLATFORM_LIBS += $(PLATFORM_LIBGCC)
676 # Special flags for CPP when processing the linker script.
677 # Pass the version down so we can handle backwards compatibility
680 -include $(TOPDIR)/include/u-boot/u-boot.lds.h \
682 $(shell $(LD) --version | \
683 sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
685 #########################################################################
686 #########################################################################
688 ifneq ($(CONFIG_BOARD_SIZE_LIMIT),)
690 @actual=`wc -c $@ | awk '{print $$1}'`; \
691 limit=`printf "%d" $(CONFIG_BOARD_SIZE_LIMIT)`; \
692 if test $$actual -gt $$limit; then \
693 echo "$@ exceeds file size limit:" >&2 ; \
694 echo " limit: $$limit bytes" >&2 ; \
695 echo " actual: $$actual bytes" >&2 ; \
696 echo " excess: $$((actual - limit)) bytes" >&2; \
703 # Statically apply RELA-style relocations (currently arm64 only)
704 ifneq ($(CONFIG_STATIC_RELA),)
705 # $(1) is u-boot ELF, $(2) is u-boot bin, $(3) is text base
707 start=$$($(NM) $(1) | grep __rel_dyn_start | cut -f 1 -d ' '); \
708 end=$$($(NM) $(1) | grep __rel_dyn_end | cut -f 1 -d ' '); \
709 tools/relocate-rela $(2) $(3) $$start $$end
714 # Always append ALL so that arch config.mk's can add custom ones
715 ALL-y += u-boot.srec u-boot.bin System.map
717 ALL-$(CONFIG_NAND_U_BOOT) += u-boot-nand.bin
718 ALL-$(CONFIG_ONENAND_U_BOOT) += u-boot-onenand.bin
719 ALL-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
720 ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
721 ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
722 ALL-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
723 ALL-$(CONFIG_OF_SEPARATE) += u-boot-dtb.bin
724 ifneq ($(CONFIG_SPL_TARGET),)
725 ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
727 ALL-$(CONFIG_REMAKE_ELF) += u-boot.elf
729 # enable combined SPL/u-boot/dtb rules for tegra
730 ifneq ($(CONFIG_TEGRA),)
731 ifeq ($(CONFIG_SPL),y)
732 ifeq ($(CONFIG_OF_SEPARATE),y)
733 ALL-y += u-boot-dtb-tegra.bin
735 ALL-y += u-boot-nodtb-tegra.bin
740 LDFLAGS_u-boot += -T u-boot.lds $(LDFLAGS_FINAL)
741 ifneq ($(CONFIG_SYS_TEXT_BASE),)
742 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
748 dtbs dts/dt.dtb: checkdtc u-boot
749 $(Q)$(MAKE) $(build)=dts dtbs
751 u-boot-dtb.bin: u-boot.bin dts/dt.dtb
755 $(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@
758 $(OBJCOPY) ${OBJCFLAGS} -O srec $< $@
761 $(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
762 $(call DO_STATIC_RELA,$<,$@,$(CONFIG_SYS_TEXT_BASE))
767 $(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
770 u-boot.ldr.hex: u-boot.ldr
771 $(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@ -I binary
773 u-boot.ldr.srec: u-boot.ldr
774 $(OBJCOPY) ${OBJCFLAGS} -O srec $< $@ -I binary
777 # U-Boot entry point, needed for booting of full-blown U-Boot
778 # from the SPL U-Boot version.
780 ifndef CONFIG_SYS_UBOOT_START
781 CONFIG_SYS_UBOOT_START := 0
784 u-boot.img: u-boot.bin
785 tools/mkimage -A $(ARCH) -T firmware -C none \
786 -O u-boot -a $(CONFIG_SYS_TEXT_BASE) \
787 -e $(CONFIG_SYS_UBOOT_START) \
788 -n $(shell sed -n -e 's/.*U_BOOT_VERSION//p' $(VERSION_FILE) | \
789 sed -e 's/"[ ]*$$/ for $(BOARD) board"/') \
792 u-boot.imx: u-boot.bin
793 $(MAKE) $(build)=arch/arm/imx-common $(objtree)/u-boot.imx
795 u-boot.kwb: u-boot.bin
796 tools/mkimage -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage \
797 -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) -d $< $@
799 u-boot.pbl: u-boot.bin
800 tools/mkimage -n $(CONFIG_SYS_FSL_PBL_RCW) \
801 -R $(CONFIG_SYS_FSL_PBL_PBI) -T pblimage \
804 u-boot.sha1: u-boot.bin
805 tools/ubsha1 u-boot.bin
808 $(OBJDUMP) -d $< > $@
810 # $@ is output, $(1) and $(2) are inputs, $(3) is padded intermediate,
813 $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(4) -I binary -O binary \
815 cat $(3) $(2) > $@; \
819 SPL_PAYLOAD := tpl/u-boot-with-tpl.bin
821 SPL_PAYLOAD := u-boot.bin
824 u-boot-with-spl.bin: spl/u-boot-spl.bin $(SPL_PAYLOAD)
825 $(call SPL_PAD_APPEND,$<,$(SPL_PAYLOAD),spl/u-boot-spl-pad.bin,$(CONFIG_SPL_PAD_TO))
827 tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin
828 $(call SPL_PAD_APPEND,$<,u-boot.bin,tpl/u-boot-tpl-pad.bin,$(CONFIG_TPL_PAD_TO))
830 u-boot-with-spl.imx: spl/u-boot-spl.bin u-boot.bin
831 $(MAKE) $(build)=arch/arm/imx-common \
832 $(OBJTREE)/u-boot-with-spl.imx
834 u-boot-with-nand-spl.imx: spl/u-boot-spl.bin u-boot.bin
835 $(MAKE) $(build)=arch/arm/imx-common \
836 $(OBJTREE)/u-boot-with-nand-spl.imx
838 u-boot.ubl: u-boot-with-spl.bin
839 tools/mkimage -n $(UBL_CONFIG) -T ublimage \
840 -e $(CONFIG_SYS_TEXT_BASE) -d $< u-boot.ubl
842 u-boot.ais: spl/u-boot-spl.bin u-boot.img
843 tools/mkimage -s -n $(if $(CONFIG_AIS_CONFIG_FILE),$(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \
845 -e $(CONFIG_SPL_TEXT_BASE) \
846 -d spl/u-boot-spl.bin \
848 $(OBJCOPY) ${OBJCFLAGS} -I binary \
849 --pad-to=$(CONFIG_SPL_MAX_SIZE) -O binary \
850 spl/u-boot-spl.ais spl/u-boot-spl-pad.ais
851 cat spl/u-boot-spl-pad.ais u-boot.img > u-boot.ais
854 u-boot.sb: u-boot.bin spl/u-boot-spl.bin
855 $(MAKE) $(build)=$(CPUDIR)/$(SOC)/ $(OBJTREE)/u-boot.sb
857 # On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
858 # Both images are created using mkimage (crc etc), so that the ROM
859 # bootloader can check its integrity. Padding needs to be done to the
860 # SPL image (with mkimage header) and not the binary. Otherwise the resulting image
861 # which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
862 # The resulting image containing both U-Boot images is called u-boot.spr
863 u-boot.spr: u-boot.img spl/u-boot-spl.bin
864 tools/mkimage -A $(ARCH) -T firmware -C none \
865 -a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER \
866 -d spl/u-boot-spl.bin $@
867 $(OBJCOPY) -I binary -O binary \
868 --pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff $@
871 ifneq ($(CONFIG_TEGRA),)
872 u-boot-nodtb-tegra.bin: spl/u-boot-spl.bin u-boot.bin
873 $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SYS_TEXT_BASE) -O binary spl/u-boot-spl spl/u-boot-spl-pad.bin
874 cat spl/u-boot-spl-pad.bin u-boot.bin > $@
875 rm spl/u-boot-spl-pad.bin
877 ifeq ($(CONFIG_OF_SEPARATE),y)
878 u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin dts/dt.dtb
883 u-boot-img.bin: spl/u-boot-spl.bin u-boot.img
884 cat spl/u-boot-spl.bin u-boot.img > $@
886 # PPC4xx needs the SPL at the end of the image, since the reset vector
887 # is located at 0xfffffffc. So we can't use the "u-boot-img.bin" target
888 # and need to introduce a new build target with the full blown U-Boot
889 # at the start padded up to the start of the SPL image. And then concat
890 # the SPL image to the end.
891 u-boot-img-spl-at-end.bin: spl/u-boot-spl.bin u-boot.img
892 $(OBJCOPY) -I binary -O binary --pad-to=$(CONFIG_UBOOT_PAD_TO) \
893 --gap-fill=0xff u-boot.img $@
894 cat spl/u-boot-spl.bin >> $@
896 # Create a new ELF from a raw binary file. This is useful for arm64
897 # where static relocation needs to be performed on the raw binary,
898 # but certain simulators only accept an ELF file (but don't do the
900 # FIXME refactor dts/Makefile to share target/arch detection
901 u-boot.elf: u-boot.bin
902 @$(OBJCOPY) -B aarch64 -I binary -O elf64-littleaarch64 \
904 @$(LD) u-boot-elf.o -o $@ \
905 --defsym=_start=$(CONFIG_SYS_TEXT_BASE) \
906 -Ttext=$(CONFIG_SYS_TEXT_BASE)
908 ifeq ($(CONFIG_SANDBOX),y)
910 $(CC) $(SYMS) -T u-boot.lds \
911 -Wl,--start-group $(u-boot-main) -Wl,--end-group \
912 $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -o u-boot
915 $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
917 --start-group $(u-boot-main) --end-group $(PLATFORM_LIBS) \
918 -Map u-boot.map -o u-boot
921 u-boot: $(u-boot-init) $(u-boot-main) u-boot.lds
923 ifeq ($(CONFIG_KALLSYMS),y)
924 smap=`$(call SYSTEM_MAP,u-boot) | \
925 awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \
926 $(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \
927 -c $(srctree)/common/system_map.c -o common/system_map.o
928 $(GEN_UBOOT) common/system_map.o
931 # The actual objects are generated when descending,
932 # make sure no implicit rule kicks in
933 $(sort $(u-boot-init) $(u-boot-main)): $(u-boot-dirs) ;
935 # Handle descending into subdirectories listed in $(vmlinux-dirs)
936 # Preset locale variables to speed up the build process. Limit locale
937 # tweaks to this spot to avoid wrong language settings when running
938 # make menuconfig etc.
939 # Error messages still appears in the original language
941 PHONY += $(u-boot-dirs)
942 $(u-boot-dirs): depend prepare scripts
943 $(Q)$(MAKE) $(build)=$@
945 tools: $(TIMESTAMP_FILE) $(VERSION_FILE)
946 # The "tools" are needed early
947 $(filter-out tools, $(u-boot-dirs)): tools
948 # The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
949 # is "yes"), so compile examples after U-Boot is compiled.
950 examples: $(filter-out examples, $(u-boot-dirs))
952 # Things we need to do before we recursively start building the kernel
953 # or the modules are listed in "prepare".
954 # A multi level approach is used. prepareN is processed before prepareN-1.
955 # archprepare is used in arch Makefiles and when processed asm symlink,
956 # version.h and scripts_basic is processed / created.
958 # Listed in dependency order
959 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
961 # prepare3 is used to check if we are building in a separate output directory,
963 # 1) Check that make has not been executed in the kernel src $(srctree)
965 ifneq ($(KBUILD_SRC),)
966 @$(kecho) ' Using $(srctree) as source for u-boot'
967 $(Q)if [ -f $(srctree)/include/config.mk ]; then \
968 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
969 echo >&2 " in the '$(srctree)' directory.";\
974 # prepare2 creates a makefile if using a separate output directory
975 prepare2: prepare3 outputmakefile
980 archprepare: prepare1 scripts_basic
982 prepare0: archprepare FORCE
985 # All the preparing..
989 # Auto-generate the autoconf.mk file (which is included by all makefiles)
991 # This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
992 # the dep file is only include in this top level makefile to determine when
993 # to regenerate the autoconf.mk file.
995 quiet_cmd_autoconf_dep = GEN $@
996 cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M $(c_flags) \
997 -MQ include/autoconf.mk $(srctree)/include/common.h > $@ || rm $@
999 include/autoconf.mk.dep: include/config.h include/common.h
1000 $(call cmd,autoconf_dep)
1002 quiet_cmd_autoconf = GEN $@
1008 include/autoconf.mk: include/config.h
1009 $(call cmd,autoconf)
1011 u-boot.lds: $(LDSCRIPT) depend
1012 $(CPP) $(cpp_flags) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
1014 nand_spl: $(TIMESTAMP_FILE) $(VERSION_FILE) depend prepare
1015 $(MAKE) $(build)=nand_spl/board/$(BOARDDIR) all
1017 u-boot-nand.bin: nand_spl u-boot.bin
1018 cat nand_spl/u-boot-spl-16k.bin u-boot.bin > u-boot-nand.bin
1020 spl/u-boot-spl.bin: tools depend prepare
1021 $(MAKE) obj=spl -f $(srctree)/spl/Makefile all
1023 tpl/u-boot-tpl.bin: tools depend prepare
1024 $(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
1026 # Explicitly make _depend in subdirs containing multiple targets to prevent
1027 # parallel sub-makes creating .depend files simultaneously.
1028 depend dep: $(TIMESTAMP_FILE) $(VERSION_FILE) \
1029 include/generated/generic-asm-offsets.h \
1030 include/generated/asm-offsets.h
1032 TAG_SUBDIRS := $(u-boot-dirs) include
1040 $(OBJDUMP) -d u-boot $$(find . -name u-boot-spl) | \
1041 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1044 ctags -w -o ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
1045 -name '*.[chS]' -print`
1048 etags -a -o $(obj)etags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
1049 -name '*.[chS]' -print`
1051 $(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) -name '*.[chS]' -print > \
1057 grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \
1060 @$(call SYSTEM_MAP,$<) > $@
1063 @if test $(call cc-version) -lt 0404; then \
1064 echo -n '*** Your GCC does not produce working '; \
1065 echo 'binaries in THUMB mode.'; \
1066 echo '*** Your board is configured for THUMB mode.'; \
1070 # GCC 3.x is reported to have problems generating the type of relocation
1071 # that U-Boot wants.
1072 # See http://lists.denx.de/pipermail/u-boot/2012-September/135156.html
1074 @if test $(call cc-version) -lt 0400; then \
1075 echo -n '*** Your GCC is too old, please upgrade to GCC 4.x or newer'; \
1080 @if test $(call dtc-version) -lt 0104; then \
1081 echo '*** Your dtc is too old, please upgrade to dtc 1.4 or newer'; \
1085 quiet_cmd_offsets = GEN $@
1086 cmd_offsets = $(srctree)/tools/scripts/make-asm-offsets $< $@
1088 include/generated/generic-asm-offsets.h: lib/asm-offsets.s
1091 quiet_cmd_asm-offsets.s = CC $@
1092 cmd_asm-offsets.s = mkdir -p lib; \
1093 $(CC) -DDO_DEPS_ONLY \
1094 $(c_flags) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
1097 lib/asm-offsets.s: $(srctree)/lib/asm-offsets.c include/config.h
1098 $(call cmd,asm-offsets.s)
1100 include/generated/asm-offsets.h: $(CPUDIR)/$(SOC)/asm-offsets.s
1103 quiet_cmd_soc_asm-offsets.s = CC $@
1104 cmd_soc_asm-offsets.s = mkdir -p $(CPUDIR)/$(SOC); \
1105 if [ -f $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c ];then \
1106 $(CC) -DDO_DEPS_ONLY \
1107 $(c_flags) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
1108 -o $@ $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c -c -S; \
1113 $(CPUDIR)/$(SOC)/asm-offsets.s: include/config.h
1114 $(call cmd,soc_asm-offsets.s)
1116 #########################################################################
1118 # ARM relocations should all be R_ARM_RELATIVE (32-bit) or
1119 # R_AARCH64_RELATIVE (64-bit).
1120 checkarmreloc: u-boot
1121 @RELOC="`$(CROSS_COMPILE)readelf -r -W $< | cut -d ' ' -f 4 | \
1122 grep R_A | sort -u`"; \
1123 if test "$$RELOC" != "R_ARM_RELATIVE" -a \
1124 "$$RELOC" != "R_AARCH64_RELATIVE"; then \
1125 echo "$< contains unexpected relocations: $$RELOC"; \
1130 @mkdir -p $(dir $(VERSION_FILE))
1131 @( localvers='$(shell $(TOPDIR)/scripts/setlocalversion $(TOPDIR))' ; \
1132 printf '#define PLAIN_VERSION "%s%s"\n' \
1133 "$(U_BOOT_VERSION)" "$${localvers}" ; \
1134 printf '#define U_BOOT_VERSION "U-Boot %s%s"\n' \
1135 "$(U_BOOT_VERSION)" "$${localvers}" ; \
1137 @( printf '#define CC_VERSION_STRING "%s"\n' \
1139 @( printf '#define LD_VERSION_STRING "%s"\n' \
1144 @mkdir -p $(dir $(TIMESTAMP_FILE))
1149 env: depend scripts_basic
1150 $(Q)$(MAKE) $(build)=tools/$@
1152 tools-all: HOST_TOOLS_ALL=y
1153 tools-all: env tools ;
1157 git log --no-merges U-Boot-1_1_5.. | \
1158 unexpand -a | sed -e 's/\s\s*$$//' > $@
1160 include/license.h: tools/bin2header COPYING
1161 cat COPYING | gzip -9 -c | ./tools/bin2header license_gzip > include/license.h
1162 #########################################################################
1165 # Cleaning is done on three levels.
1166 # make clean Delete most generated files
1167 # Leave enough to build external modules
1168 # make mrproper Delete the current configuration, and all generated files
1169 # make distclean Remove editor backup files, patch leftover files and the like
1171 # Directories & files removed with 'make clean'
1172 CLEAN_DIRS += $(MODVERDIR)
1173 CLEAN_FILES += u-boot.lds include/bmp_logo.h include/bmp_logo_data.h \
1174 board/*/config.tmp board/*/*/config.tmp \
1175 include/autoconf.mk* include/spl-autoconf.mk \
1176 include/tpl-autoconf.mk
1178 # Directories & files removed with 'make clobber'
1179 CLOBBER_DIRS += $(patsubst %,spl/%, $(filter-out Makefile, \
1180 $(shell ls -1 spl 2>/dev/null))) \
1182 CLOBBER_FILES += u-boot* MLO MLO* SPL System.map nand_spl/u-boot*
1184 # Directories & files removed with 'make mrproper'
1185 MRPROPER_DIRS += include/config include/generated
1186 MRPROPER_FILES += .config .config.old \
1187 tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1188 include/config.h include/config.mk
1190 # clean - Delete most, but leave enough to build external modules
1192 clean: rm-dirs := $(CLEAN_DIRS)
1193 clean: rm-files := $(CLEAN_FILES)
1195 clean-dirs := $(foreach f,$(u-boot-alldirs),$(if $(wildcard $f/Makefile),$f))
1197 clean-dirs := $(addprefix _clean_, $(clean-dirs) doc/DocBook)
1199 PHONY += $(clean-dirs) clean archclean
1201 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1203 # TODO: Do not use *.cfgtmp
1204 clean: $(clean-dirs)
1207 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1208 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1209 -o -name '*.ko.*' -o -name '*.su' -o -name '*.cfgtmp' \
1210 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1211 -o -name '*.symtypes' -o -name 'modules.order' \
1212 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1213 -o -name '*.gcno' \) -type f -print | xargs rm -f
1214 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1215 -path './nand_spl/*' -type l -print | xargs rm -f
1219 clobber: rm-dirs := $(CLOBBER_DIRS)
1220 clobber: rm-files := $(CLOBBER_FILES)
1228 # mrproper - Delete all generated files, including .config
1230 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1231 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1232 mrproper-dirs := $(addprefix _mrproper_,scripts)
1234 PHONY += $(mrproper-dirs) mrproper archmrproper
1236 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1238 mrproper: clobber $(mrproper-dirs)
1241 @rm -f arch/*/include/asm/arch arch/*/include/asm/proc
1248 @find $(srctree) $(RCS_FIND_IGNORE) \
1249 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1250 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1252 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1253 -type f -print | xargs rm -f
1256 F=`basename $(TOPDIR)` ; cd .. ; \
1257 gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
1260 # Documentation targets
1261 # ---------------------------------------------------------------------------
1262 %docs: scripts_basic FORCE
1263 $(Q)$(MAKE) $(build)=scripts build_docproc
1264 $(Q)$(MAKE) $(build)=doc/DocBook $@
1267 PHONY += prepare scripts
1271 endif #ifeq ($(config-targets),1)
1272 endif #ifeq ($(mixed-targets),1)
1274 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1275 cmd_rmdirs = rm -rf $(rm-dirs)
1277 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1278 cmd_rmfiles = rm -f $(rm-files)
1280 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1282 # $(Q)$(MAKE) $(clean)=dir
1283 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1285 endif # skip-makefile
1290 # Declare the contents of the .PHONY variable as phony. We keep that
1291 # information in a variable so we can use it in if_changed and friends.