d3dd3b5a29
Allow the compression commands in Kbuild (i.e. gzip, bzip2, lzma) to take multiple input files and emit the concatenated compressed output. This avoids an intermediate step when a kernel image is built from multiple components, such as the relocatable x86-32 kernel. Sam Ravnborg integrated the bin_size script into the Makefile. [ Impact: new build feature, not yet used ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Sam Ravnborg <sam@ravnborg.org>
217 lines
8.1 KiB
Makefile
217 lines
8.1 KiB
Makefile
# Backward compatibility
|
|
asflags-y += $(EXTRA_AFLAGS)
|
|
ccflags-y += $(EXTRA_CFLAGS)
|
|
cppflags-y += $(EXTRA_CPPFLAGS)
|
|
ldflags-y += $(EXTRA_LDFLAGS)
|
|
|
|
# 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.o
|
|
# 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)
|
|
|
|
# Determine modorder.
|
|
# Unfortunately, we don't have information about ordering between -y
|
|
# and -m subdirs. Just put -y's first.
|
|
modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
|
|
|
|
__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.o, $(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.o, $(obj-y))
|
|
|
|
# $(obj-dirs) is a list of directories that contain object files
|
|
obj-dirs := $(dir $(multi-objs) $(subdir-obj-y))
|
|
|
|
# Replace multi-part objects by their individual parts, look at local dir only
|
|
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
|
|
real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
|
|
|
|
# Add subdir path
|
|
|
|
extra-y := $(addprefix $(obj)/,$(extra-y))
|
|
always := $(addprefix $(obj)/,$(always))
|
|
targets := $(addprefix $(obj)/,$(targets))
|
|
modorder := $(addprefix $(obj)/,$(modorder))
|
|
obj-y := $(addprefix $(obj)/,$(obj-y))
|
|
obj-m := $(addprefix $(obj)/,$(obj-m))
|
|
lib-y := $(addprefix $(obj)/,$(lib-y))
|
|
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
|
|
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
|
|
real-objs-m := $(addprefix $(obj)/,$(real-objs-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))
|
|
obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
|
|
|
|
# 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,$(modname)))")
|
|
|
|
#hash values
|
|
ifdef CONFIG_DYNAMIC_DEBUG
|
|
debug_flags = -D"DEBUG_HASH=$(shell ./scripts/basic/hash djb2 $(@D)$(modname))"\
|
|
-D"DEBUG_HASH2=$(shell ./scripts/basic/hash r5 $(@D)$(modname))"
|
|
else
|
|
debug_flags =
|
|
endif
|
|
|
|
orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
|
|
$(ccflags-y) $(CFLAGS_$(basetarget).o)
|
|
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
|
|
_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \
|
|
$(asflags-y) $(AFLAGS_$(basetarget).o)
|
|
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
|
|
|
|
# If building the kernel in a separate objtree expand all occurrences
|
|
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
|
|
|
|
ifeq ($(KBUILD_SRC),)
|
|
__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 = $(call flags,_cpp_flags)
|
|
endif
|
|
|
|
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
$(__c_flags) $(modkern_cflags) \
|
|
-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) \
|
|
$(debug_flags)
|
|
|
|
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
$(__a_flags) $(modkern_aflags)
|
|
|
|
cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
$(__cpp_flags)
|
|
|
|
ld_flags = $(LDFLAGS) $(ldflags-y)
|
|
|
|
# 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=))))
|
|
|
|
# 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) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@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 -f -9 > $@) || \
|
|
(rm -f $@ ; false)
|
|
|
|
|
|
# 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 = echo -ne $(shell \
|
|
dec_size=0; \
|
|
for F in $1; do \
|
|
fsize=$$(stat -c "%s" $$F); \
|
|
dec_size=$$(expr $$dec_size + $$fsize); \
|
|
done; \
|
|
printf "%08x" $$dec_size | \
|
|
sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g' \
|
|
)
|
|
|
|
quiet_cmd_bzip2 = BZIP2 $@
|
|
cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
|
|
bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
# Lzma
|
|
# ---------------------------------------------------------------------------
|
|
|
|
quiet_cmd_lzma = LZMA $@
|
|
cmd_lzma = (cat $(filter-out FORCE,$^) | \
|
|
lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|