# SPDX-License-Identifier: GPL-2.0
# Backward compatibility
asflags-y += $(EXTRA_AFLAGS)
ccflags-y += $(EXTRA_CFLAGS)
cppflags-y += $(EXTRA_CPPFLAGS)
ldflags-y += $(EXTRA_LDFLAGS)
always-y += $(always)
hostprogs += $(hostprogs-y) $(hostprogs-m)
# Figure out what we need to build from the various variables
# ===========================================================================
# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))
# Libraries are always collected in one lib file.
# Filter out objects already built-in
lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a
# and add the directory to the list of dirs to descend into: $(subdir-y)
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
# lowlevel is present in the PBL if enabled
# otherwise in barebox
ifeq ($(CONFIG_PBL_IMAGE), y)
pbl-y += $(lwl-y)
else
obj-y += $(lwl-y)
endif
obj-y += $(obj-pbl-y)
pbl-y += $(obj-pbl-y)
# pbl objects are suffixed with .pbl.o
pbl-y := $(patsubst %.o,%.pbl.o,$(pbl-y))
# add subdir from $(obj-y) too so we do not need to have the dir define in
# both $(obj-y) and $(pbl-y)
__pbl-y := $(filter-out $(pbl-y), $(filter %/, $(obj-y)))
pbl-y += $(__pbl-y)
pbl-y := $(sort $(patsubst %/, %/built-in.pbl.a, $(pbl-y)))
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m += $(__subdir-m)
obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
obj-m := $(filter-out %/, $(obj-m))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m))
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
multi-used := $(multi-used-y) $(multi-used-m)
single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
# Build list of the parts of our composite objects, our composite
# objects depend on those (obviously)
multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
multi-objs := $(multi-objs-y) $(multi-objs-m)
# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
# tell kbuild to descend
__subdir-obj-y := $(filter %/built-in.pbl.a, $(pbl-y))
subdir-obj-y := $(filter %/built-in.a, $(obj-y))
subdir-obj-y += $(__subdir-obj-y)
obj-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).o,$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX),$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).S,$(bbenv-y))
extra-y += $(patsubst %,%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).o,$(bbenv-y))
# Replace multi-part objects by their individual parts,
# including built-in.a from subdirectories
real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
always-y += $(always-m)
# Add subdir path
extra-y := $(addprefix $(obj)/,$(extra-y))
always-y := $(addprefix $(obj)/,$(always-y))
targets := $(addprefix $(obj)/,$(targets))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
lib-y := $(addprefix $(obj)/,$(lib-y))
pbl-y := $(addprefix $(obj)/,$(pbl-y))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
single-used-m := $(addprefix $(obj)/,$(single-used-m))
multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
# target with $(obj)/ and its suffix stripped
target-stem = $(basename $(patsubst $(obj)/%,%,$@))
# These flags are needed for modversions and compiling, so we define them here
# already
# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
# end up in (or would, if it gets compiled in)
# Note: It's possible that one object gets potentially linked into more
# than one module. In that case KBUILD_MODNAME will be set to foo_bar,
# where foo and bar are the name of the modules.
name-fix = $(subst $(comma),_,$(subst -,_,$1))
basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
modname_flags = $(if $(filter 1,$(words $(modname))),\
-D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
_c_flags = $(KBUILD_CFLAGS) $(ccflags-y) $(CFLAGS_$(target-stem).o)
_a_flags = $(KBUILD_AFLAGS) $(asflags-y) $(AFLAGS_$(target-stem).o)
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
ifeq ($(CONFIG_UBSAN),y)
_CFLAGS_UBSAN = $(eval _CFLAGS_UBSAN := $(CFLAGS_UBSAN))$(_CFLAGS_UBSAN)
_c_flags += $(if $(patsubst n%,, \
$(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
$(_CFLAGS_UBSAN))
PBL_CPPFLAGS += $(call cc-option,-fno-sanitize=all)
endif
# If building barebox in a separate objtree expand all occurrences
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
ifndef building_out_of_srctree
__c_flags = $(_c_flags)
__a_flags = $(_a_flags)
__cpp_flags = $(_cpp_flags)
else
# -I$(obj) locates generated .h files
# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
# and locates generated .h files
# FIXME: Replace both with specific CFLAGS* statements in the makefiles
__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
__a_flags = $(call flags,_a_flags)
__cpp_flags = $(call flags,_cpp_flags)
endif
part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
part-of-pbl = $(if $(filter $(basename $@).o, $(pbl-y))$(filter $@, $(pbl-target)),y)
quiet_modtag = $(if $(part-of-pbl),[P],$(if $(part-of-module),[M], ))
pbl_cppflags = $(if $(part-of-pbl), -D__PBL__ $(PBL_CPPFLAGS))
modkern_cflags = \
$(if $(part-of-module), \
$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
modkern_aflags = $(if $(part-of-module), \
$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
$(__c_flags) $(modkern_cflags) $(pbl_cppflags) \
-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
$(__a_flags) $(modkern_aflags) $(pbl_cppflags)
cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)
ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y)
dtc_cpp_flags = -Wp,-MD,$(depfile).pre -nostdinc \
-I$(srctree)/arch/$(SRCARCH)/dts/include \
-I$(srctree)/dts/include \
-I$(srctree)/include \
-I$(srctree)/dts/src/ \
-undef -D__DTS__
ifdef CONFIG_BOOTM_FITIMAGE_PUBKEY
ifneq ($(CONFIG_BOOTM_FITIMAGE_PUBKEY),"")
dtc_cpp_flags += -DCONFIG_BOOTM_FITIMAGE_PUBKEY=\"$(CONFIG_BOOTM_FITIMAGE_PUBKEY)\"
endif
endif
# Finds the multi-part object the current object will be linked into
modname-multi = $(sort $(foreach m,$(multi-used),\
$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
# Useful for describing the dependency of composite objects
# Usage:
# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
define multi_depend
$(foreach m, $(notdir $1), \
$(eval $(obj)/$m: \
$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
endef
# Shipped files
# ===========================================================================
quiet_cmd_shipped = SHIPPED $@
cmd_shipped = cat $< > $@
$(obj)/%:: $(src)/%_shipped
$(call cmd,shipped)
# Commands useful for building a boot image
# ===========================================================================
#
# Use as following:
#
# target: source(s) FORCE
# $(if_changed,ld/objcopy/gzip)
#
# and add target to extra-y so that we know we have to
# read in the saved command line
# Linking
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(KBUILD_LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \
$(filter-out FORCE,$^) -o $@
# Objcopy
# ---------------------------------------------------------------------------
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# Gzip
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
(rm -f $@ ; false)
%.gz: %
$(call if_changed,gzip)
# XZ
# ---------------------------------------------------------------------------
# Use xzkern to compress the kernel image and xzmisc to compress other things.
#
# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
# of the kernel decompressor. A BCJ filter is used if it is available for
# the target architecture. xzkern also appends uncompressed size of the data
# using size_append. The .xz format has the size information available at
# the end of the file too, but it's in more complex format and it's good to
# avoid changing the part of the boot code that reads the uncompressed size.
# Note that the bytes added by size_append will make the xz tool think that
# the file is corrupt. This is expected.
#
# xzmisc doesn't use size_append, so it can be used to create normal .xz
# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
# big dictionary would increase the memory usage too much in the multi-call
# decompression mode. A BCJ filter isn't used either.
quiet_cmd_xzkern = XZKERN $@
cmd_xzkern = (cat $(filter-out FORCE,$^) | \
sh $(srctree)/scripts/xz_wrap.sh && \
$(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
(rm -f $@ ; false)
%.xzkern: %
$(call if_changed,xzkern)
# DTC
# ---------------------------------------------------------------------------
DTC_FLAGS += -Wno-unit_address_vs_reg \
-Wno-unit_address_format \
-Wno-avoid_unnecessary_addr_size \
-Wno-alias_paths \
-Wno-alias_paths \
-Wno-graph_child_address \
-Wno-simple_bus_reg \
-Wno-unique_unit_address \
-Wno-pci_device_reg
ifeq ($(CONFIG_OF_OVERLAY_LIVE), y)
DTC_FLAGS += -@
endif
# Generate an assembly file to wrap the output of the device tree compiler
quiet_cmd_dt_S_dtb = DTB $@
cmd_dt_S_dtb = $(srctree)/scripts/gen-dtb-s $(subst -,_,$(*F)) $< $(CONFIG_IMD) > $@
$(obj)/%.dtb.S: $(obj)/%.dtb $(srctree)/scripts/gen-dtb-s FORCE
$(call if_changed,dt_S_dtb)
quiet_cmd_dtc = DTC $@
cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
-i $(srctree)/arch/$(SRCARCH)/dts $(DTC_FLAGS) \
-i $(srctree)/dts/src/$(SRCARCH) \
-d $(depfile).dtc $(dtc-tmp) ; \
cat $(depfile).pre $(depfile).dtc > $(depfile)
$(obj)/%.dtb: $(src)/%.dts FORCE
$(call if_changed_dep,dtc)
dtc-tmp = $(subst $(comma),_,$(dot-target).dts)
quiet_cmd_env_S = ENV.S $@
cmd_env_S = \
( \
echo '\#include <asm-generic/barebox.lds.h>'; \
echo '.section .bbenv.rodata.$(subst -,_,$(*F)),"a"'; \
echo '.balign STRUCT_ALIGNMENT'; \
echo '.global __bbenv_$(subst -,_,$(*F))_start'; \
echo '__bbenv_$(subst -,_,$(*F))_start:'; \
echo '.incbin "$<" '; \
echo '__bbenv_$(subst -,_,$(*F))_end:'; \
echo '.global __bbenv_$(subst -,_,$(*F))_end'; \
echo '.balign STRUCT_ALIGNMENT'; \
) > $@
$(obj)/%.bbenv$(DEFAULT_COMPRESSION_SUFFIX).S: $(src)/%.bbenv$(DEFAULT_COMPRESSION_SUFFIX) FORCE
$(call if_changed,env_S)
quiet_cmd_env = ENV $@
cmd_env=$(srctree)/scripts/genenv $(srctree) $(objtree) $@ $<
# genenv is always called, but only generates output when the file actually
# changes, so that the dependent targets are not unnecessarily rebuilt
%.bbenv$(DEFAULT_COMPRESSION_SUFFIX): % FORCE
$(call cmd,env)
# Bzip2
# ---------------------------------------------------------------------------
# Bzip2 and LZMA do not include size in file... so we have to fake that;
# append the size as a 32-bit littleendian number as gzip does.
size_append = printf $(shell \
dec_size=0; \
for F in $1; do \
fsize=$$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" $$F);\
dec_size=$$(expr $$dec_size + $$fsize); \
done; \
printf "%08x\n" $$dec_size | \
sed 's/\(..\)/\1 /g' | { \
read ch0 ch1 ch2 ch3; \
for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
printf '%s%03o' '\\' $$((0x$$ch)); \
done; \
} \
)
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
%.bz2: %
$(call if_changed,bzip2)
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = (cat $(filter-out FORCE,$^) | \
lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
%.lzma: %
$(call if_changed,lzma)
quiet_cmd_lzo = LZO $@
cmd_lzo = (cat $(filter-out FORCE,$^) | \
lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
%.lzo: %
$(call if_changed,lzo)
# XZ
# ---------------------------------------------------------------------------
# Use xzkern to compress the kernel image and xzmisc to compress other things.
#
# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
# of the kernel decompressor. A BCJ filter is used if it is available for
# the target architecture. xzkern also appends uncompressed size of the data
# using size_append. The .xz format has the size information available at
# the end of the file too, but it's in more complex format and it's good to
# avoid changing the part of the boot code that reads the uncompressed size.
# Note that the bytes added by size_append will make the xz tool think that
# the file is corrupt. This is expected.
#
# xzmisc doesn't use size_append, so it can be used to create normal .xz
# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
# big dictionary would increase the memory usage too much in the multi-call
# decompression mode. A BCJ filter isn't used either.
quiet_cmd_xzkern = XZKERN $@
cmd_xzkern = (cat $(filter-out FORCE,$^) | \
sh $(srctree)/scripts/xz_wrap.sh && \
$(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
(rm -f $@ ; false)
# lz4
# ---------------------------------------------------------------------------
quiet_cmd_lz4 = LZ4 $@
cmd_lz4 = (cat $(filter-out FORCE,$^) | \
lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
%.lz4: %
$(call if_changed,lz4)
# comp_copy
# ---------------------------------------------------------------------------
# Wrapper which only copies a file, but compatible to the compression
# functions above. Appends the size to the result file
quiet_cmd_comp_copy ?= SHIPPED_S $@
cmd_comp_copy ?= cat $(filter-out FORCE,$^) > $@; \
$(call size_append, $(filter-out FORCE,$^)) >> $@
quiet_cmd_disasm = DISASM $@
cmd_disasm = $(OBJDUMP) -d $< > $@
quiet_cmd_ln = LN $@
cmd_ln = ln -sf $< $@
quiet_cmd_check_size = CHKSIZE $2
cmd_check_size = set -e; \
size=`printf "%d" $2`; \
max_size=`printf "%d" $3`; \
if [ $$size -gt $$max_size ] ; \
then \
echo "$@ size $$size > maximum size $$max_size" >&2; \
exit 1 ; \
fi;
# Check size of a file
quiet_cmd_check_file_size = CHKFILESIZE $2
cmd_check_file_size = set -e; \
size=`${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" $2`; \
max_size=`printf "%d" $3`; \
if [ $$size -gt $$max_size ] ; \
then \
echo "$@ size $$size > maximum size $$max_size" >&2; \
exit 1 ; \
fi;
quiet_cmd_imximage__S_dcd= DCD_S $@
cmd_imximage_S_dcd= \
( \
echo '\#include <asm-generic/barebox.lds.h>'; \
echo '.balign STRUCT_ALIGNMENT'; \
echo '.global $(subst -,_,$(*F))_start'; \
echo '$(subst -,_,$(*F))_start:'; \
echo '.incbin "$<" '; \
echo '$(subst -,_,$(*F))_end:'; \
echo '.global $(subst -,_,$(*F))_end'; \
echo '.balign STRUCT_ALIGNMENT'; \
) > $@
overwrite-hab-env = $(shell set -e; \
test -n "$(CONFIG_HAB_CERTS_ENV)"; \
test -n "$$$(1)"; \
echo -D$(1)=\\\"$(shell echo $$$(1))\\\")
imxcfg_cpp_flags = -Wp,-MD,$(depfile) -nostdinc -x assembler-with-cpp \
-I $(srctree)/include -I $(srctree)/arch/arm/mach-imx/include \
-include include/generated/autoconf.h \
$(call overwrite-hab-env,CONFIG_HABV3_SRK_PEM) \
$(call overwrite-hab-env,CONFIG_HABV3_CSF_CRT_DER) \
$(call overwrite-hab-env,CONFIG_HABV3_IMG_CRT_DER) \
$(call overwrite-hab-env,CONFIG_HABV4_TABLE_BIN) \
$(call overwrite-hab-env,CONFIG_HABV4_CSF_CRT_PEM) \
$(call overwrite-hab-env,CONFIG_HABV4_IMG_CRT_PEM)
dcd-tmp = $(subst $(comma),_,$(dot-target).dcd.tmp)
quiet_cmd_dcd = DCD $@
cmd_dcd = $(CPP) $(imxcfg_cpp_flags) -o $(dcd-tmp) $< ; \
$(objtree)/scripts/imx/imx-image -d -o $@ -c $(dcd-tmp)
$(obj)/%.dcd: $(obj)/%.imxcfg FORCE
$(call if_changed,dcd)
$(obj)/%.dcd.S: $(obj)/%.dcd
$(call cmd,imximage_S_dcd)
imximg-tmp = $(subst $(comma),_,$(dot-target).imxcfg.tmp)
quiet_cmd_imx_image = IMX-IMG $@
cmd_imx_image = $(CPP) $(imxcfg_cpp_flags) -o $(imximg-tmp) $(2) ; \
$(objtree)/scripts/imx/imx-image -o $@ -b -c $(imximg-tmp) $(3) -f $<
quiet_cmd_kwb_image = KWB $@
cmd_kwb_image = scripts/kwbimage -p $< $(OPTS_$(@F)) -o $@
quiet_cmd_mvebu1_image = MVIMG $@
cmd_mvebu1_image = scripts/mvebuimg -v 1 create -o $@ $(foreach b,$(BINHDR_$(@F)),-b $b) $(FLAGS_$(@F)) $(BOOTSRC_$(@F)) $<
quiet_cmd_cboot_bct = BCT $@
cmd_cboot_bct = $(objtree)/scripts/tegra/cbootimage -gbct -s $(soc) $< $@
$(obj)/%.bct: $(obj)/%.bct.cfg
$(call cmd,cboot_bct)
quiet_cmd_stm32_image = STM32-IMG $@
cmd_stm32_image = $(objtree)/scripts/stm32image $(OPTS_$(@F)) -i $< -o $@
quiet_cmd_b64dec = B64DEC $@
cmd_b64dec = base64 -d $< > $@
# rsa_keys
# ---------------------------------------------------------------------------
# Build a header file containing a rsa public key.
#
# The keys can change without the build system noticing, so we always
# have to call rsatoc. To avoid unnecessary rebuilds of barebox compare
# its output to the last rsatoc output. Only if it differs overwrite the
# target file.
quiet_cmd_rsa_keys = RSAKEY $@
cmd_rsa_keys = \
$(objtree)/scripts/rsatoc -o $@.tmp $(2) && \
if cmp -s $@.tmp $@; then \
rm $@.tmp; \
else \
mv $@.tmp $@; \
fi
%: %.base64
$(call cmd,b64dec)
