| # Backward compatibility |
| asflags-y += $(EXTRA_AFLAGS) |
| ccflags-y += $(EXTRA_CFLAGS) |
| cppflags-y += $(EXTRA_CPPFLAGS) |
| ldflags-y += $(EXTRA_LDFLAGS) |
| |
| # |
| # flags that take effect in sub directories |
| export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) |
| export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y) |
| |
| # 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) $(KBUILD_SUBDIR_CCFLAGS) \ |
| $(ccflags-y) $(CFLAGS_$(basetarget).o) |
| _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
| _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
| $(asflags-y) $(AFLAGS_$(basetarget).o) |
| _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
| |
| # |
| # Enable gcov profiling flags for a file, directory or for all files depending |
| # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL |
| # (in this order) |
| # |
| ifeq ($(CONFIG_GCOV_KERNEL),y) |
| _c_flags += $(if $(patsubst n%,, \ |
| $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ |
| $(CFLAGS_GCOV)) |
| endif |
| |
| # If building the kernel in a separate objtree expand all occurrences |
| # of -Idir to -I$(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 = /bin/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) |
