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361 lines
13 KiB
361 lines
13 KiB
# vim: filetype=make |
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# Backward compatibility |
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asflags-y += $(EXTRA_AFLAGS) |
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ccflags-y += $(EXTRA_CFLAGS) |
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cppflags-y += $(EXTRA_CPPFLAGS) |
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cxxflags-y += $(EXTRA_CXXFLAGS) |
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ldflags-y += $(EXTRA_LDFLAGS) |
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# |
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# flags that take effect in sub directories |
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export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) |
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export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y) |
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export KBUILD_SUBDIR_CXXFLAGS := $(KBUILD_SUBDIR_CXXFLAGS) $(subdir-cxxflags-y) |
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# Figure out what we need to build from the various variables |
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# =========================================================================== |
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# When an object is listed to be built compiled-in and modular, |
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# only build the compiled-in version |
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obj-m := $(filter-out $(obj-y),$(obj-m)) |
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# Libraries are always collected in one lib file. |
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# Filter out objects already built-in |
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lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) |
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# Handle objects in subdirs |
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# --------------------------------------------------------------------------- |
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# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o |
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# and add the directory to the list of dirs to descend into: $(subdir-y) |
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# o if we encounter foo/ in $(obj-m), remove it from $(obj-m) |
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# and add the directory to the list of dirs to descend into: $(subdir-m) |
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# Determine modorder. |
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# Unfortunately, we don't have information about ordering between -y |
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# and -m subdirs. Just put -y's first. |
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#modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) |
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_subd-y := $(if $(findstring *,$(subdir-y)),$(wildcard $(addprefix $(srctree)/$(obj)/,$(subdir-y))),) |
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subdir-y := $(sort $(foreach d,$(_subd-y), $(patsubst $(srctree)/$(obj)/%,%,$(d)))) |
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_obj-y := $(sort $(foreach d,$(_subd-y), $(patsubst $(srctree)/$(obj)/%,%/built-in.o,$(d)))) |
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__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) |
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subdir-y += $(__subdir-y) |
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__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) |
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subdir-m += $(__subdir-m) |
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obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) |
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obj-y += $(_obj-y) |
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obj-m := $(filter-out %/, $(obj-m)) |
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# Subdirectories we need to descend into |
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subdir-ym := $(sort $(subdir-y) $(subdir-m)) |
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# if $(foo-objs) exists, foo.o is a composite object |
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multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
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multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
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multi-used := $(multi-used-y) $(multi-used-m) |
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single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) |
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# Build list of the parts of our composite objects, our composite |
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# objects depend on those (obviously) |
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multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) |
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multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) |
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multi-objs := $(multi-objs-y) $(multi-objs-m) |
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# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to |
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# tell kbuild to descend |
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subdir-obj-y := $(filter %/built-in.o, $(obj-y)) |
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# $(obj-dirs) is a list of directories that contain object files |
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obj-dirs := $(dir $(multi-objs) $(obj-y)) |
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lib-dirs := $(dir $(lib-y)) |
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# Replace multi-part objects by their individual parts, look at local dir only |
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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) |
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real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) |
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# Add subdir path |
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extra-y := $(addprefix $(obj)/,$(extra-y)) |
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always := $(addprefix $(obj)/,$(always)) |
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targets := $(addprefix $(obj)/,$(targets)) |
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#modorder := $(addprefix $(obj)/,$(modorder)) |
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obj-y := $(addprefix $(obj)/,$(obj-y)) |
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obj-m := $(addprefix $(obj)/,$(obj-m)) |
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lib-y := $(addprefix $(obj)/,$(lib-y)) |
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subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) |
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real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) |
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real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) |
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single-used-m := $(addprefix $(obj)/,$(single-used-m)) |
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multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) |
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multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) |
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multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) |
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multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) |
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subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) |
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obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) |
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lib-dirs := $(addprefix $(obj)/,$(lib-dirs)) |
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# These flags are needed for modversions and compiling, so we define them here |
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# already |
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# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will |
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# end up in (or would, if it gets compiled in) |
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# Note: Files that end up in two or more modules are compiled without the |
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# KBUILD_MODNAME definition. The reason is that any made-up name would |
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# differ in different configs. |
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name-fix = $(subst $(comma),_,$(subst -,_,$1)) |
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basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" |
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modname_flags = $(if $(filter 1,$(words $(modname))),\ |
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-D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") |
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orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ |
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$(ccflags-y) $(CFLAGS_$(basetarget).o) |
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_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
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_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
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$(asflags-y) $(AFLAGS_$(basetarget).o) |
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_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
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orig_cxx_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CXXFLAGS) $(KBUILD_SUBDIR_CXXFLAGS) \ |
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$(cxxflags-y) $(CXXFLAGS_$(basetarget).o) |
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_cxx_flags = $(filter-out $(CXXFLAGS_REMOVE_$(basetarget).o), $(orig_cxx_flags)) |
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# If building the kernel in a separate objtree expand all occurrences |
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# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). |
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ifeq ($(KBUILD_SRC),) |
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__c_flags = $(_c_flags) |
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__a_flags = $(_a_flags) |
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__cpp_flags = $(_cpp_flags) |
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__cxx_flags = $(_cxx_flags) |
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else |
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# -I$(obj) locates generated .h files |
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# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files |
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# and locates generated .h files |
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# FIXME: Replace both with specific CFLAGS* statements in the makefiles |
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__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) |
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__a_flags = $(call flags,_a_flags) |
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__cpp_flags = $(call flags,_cpp_flags) |
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__cxx_flags = $(call flags,_cxx_flags) |
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endif |
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c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \ |
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$(__c_flags) $(modkern_cflags) \ |
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-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) |
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a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \ |
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$(__a_flags) $(modkern_aflags) |
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cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \ |
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$(__cpp_flags) |
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ld_flags = $(LDFLAGS) $(ldflags-y) |
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dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ |
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-I$(srctree)/drivers/of/testcase-data \ |
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-undef -D__DTS__ |
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cxx_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \ |
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$(__cxx_flags) $(modkern_cflags) \ |
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-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) |
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# Finds the multi-part object the current object will be linked into |
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modname-multi = $(sort $(foreach m,$(multi-used),\ |
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$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) |
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# Useful for describing the dependency of composite objects |
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# Usage: |
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# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) |
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define multi_depend |
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$(foreach m, $(notdir $1), \ |
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$(eval $(obj)/$m: \ |
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$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) |
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endef |
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ifdef REGENERATE_PARSERS |
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# GPERF |
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# --------------------------------------------------------------------------- |
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quiet_cmd_gperf = GPERF $@ |
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cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $< |
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.PRECIOUS: $(src)/%.hash.c_shipped |
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$(src)/%.hash.c_shipped: $(src)/%.gperf |
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$(call cmd,gperf) |
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# LEX |
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# --------------------------------------------------------------------------- |
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LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy) |
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quiet_cmd_flex = LEX $@ |
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cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $< |
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.PRECIOUS: $(src)/%.lex.c_shipped |
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$(src)/%.lex.c_shipped: $(src)/%.l |
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$(call cmd,flex) |
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# YACC |
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# --------------------------------------------------------------------------- |
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YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy) |
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quiet_cmd_bison = YACC $@ |
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cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $< |
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.PRECIOUS: $(src)/%.tab.c_shipped |
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$(src)/%.tab.c_shipped: $(src)/%.y |
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$(call cmd,bison) |
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quiet_cmd_bison_h = YACC $@ |
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cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $< |
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.PRECIOUS: $(src)/%.tab.h_shipped |
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$(src)/%.tab.h_shipped: $(src)/%.y |
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$(call cmd,bison_h) |
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endif |
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# Shipped files |
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# =========================================================================== |
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quiet_cmd_shipped = SHIPPED $@ |
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cmd_shipped = cat $< > $@ |
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$(obj)/%: $(src)/%_shipped |
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$(call cmd,shipped) |
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# Commands useful for building a boot image |
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# =========================================================================== |
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# |
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# Use as following: |
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# |
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# target: source(s) FORCE |
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# $(if_changed,ld/objcopy/gzip) |
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# |
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# and add target to extra-y so that we know we have to |
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# read in the saved command line |
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# Linking |
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# --------------------------------------------------------------------------- |
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quiet_cmd_ld = LD $@ |
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cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
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$(filter-out FORCE,$^) -o $@ |
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# Objcopy |
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# --------------------------------------------------------------------------- |
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quiet_cmd_objcopy = OBJCOPY $@ |
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cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ |
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# Gzip |
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# --------------------------------------------------------------------------- |
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quiet_cmd_gzip = GZIP $@ |
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cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ |
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(rm -f $@ ; false) |
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# DTC |
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# --------------------------------------------------------------------------- |
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# Generate an assembly file to wrap the output of the device tree compiler |
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quiet_cmd_dt_S_dtb= DTB $@ |
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cmd_dt_S_dtb= \ |
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( \ |
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echo '\#include <asm-generic/vmlinux.lds.h>'; \ |
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echo '.section .dtb.init.rodata,"a"'; \ |
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echo '.balign STRUCT_ALIGNMENT'; \ |
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echo '.global __dtb_$(*F)_begin'; \ |
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echo '__dtb_$(*F)_begin:'; \ |
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echo '.incbin "$<" '; \ |
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echo '__dtb_$(*F)_end:'; \ |
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echo '.global __dtb_$(*F)_end'; \ |
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echo '.balign STRUCT_ALIGNMENT'; \ |
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) > $@ |
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$(obj)/%.dtb.S: $(obj)/%.dtb |
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$(call cmd,dt_S_dtb) |
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quiet_cmd_dtc = DTC $@ |
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cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ |
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$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \ |
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-i $(dir $<) $(DTC_FLAGS) \ |
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-d $(depfile).dtc.tmp $(dtc-tmp) ; \ |
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cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) |
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$(obj)/%.dtb: $(src)/%.dts FORCE |
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$(call if_changed_dep,dtc) |
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dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) |
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# Bzip2 |
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# --------------------------------------------------------------------------- |
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# Bzip2 and LZMA do not include size in file... so we have to fake that; |
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# append the size as a 32-bit littleendian number as gzip does. |
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size_append = printf $(shell \ |
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dec_size=0; \ |
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for F in $1; do \ |
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fsize=$$(stat -c "%s" $$F); \ |
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dec_size=$$(expr $$dec_size + $$fsize); \ |
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done; \ |
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printf "%08x\n" $$dec_size | \ |
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sed 's/\(..\)/\1 /g' | { \ |
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read ch0 ch1 ch2 ch3; \ |
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for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ |
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printf '%s%03o' '\\' $$((0x$$ch)); \ |
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done; \ |
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} \ |
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) |
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quiet_cmd_bzip2 = BZIP2 $@ |
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cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ |
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bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
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(rm -f $@ ; false) |
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# Lzma |
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# --------------------------------------------------------------------------- |
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quiet_cmd_lzma = LZMA $@ |
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cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
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lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
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(rm -f $@ ; false) |
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quiet_cmd_lzo = LZO $@ |
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cmd_lzo = (cat $(filter-out FORCE,$^) | \ |
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lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
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(rm -f $@ ; false) |
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quiet_cmd_lz4 = LZ4 $@ |
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cmd_lz4 = (cat $(filter-out FORCE,$^) | \ |
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lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
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(rm -f $@ ; false) |
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# XZ |
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# --------------------------------------------------------------------------- |
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# Use xzkern to compress the kernel image and xzmisc to compress other things. |
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# |
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# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage |
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# of the kernel decompressor. A BCJ filter is used if it is available for |
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# the target architecture. xzkern also appends uncompressed size of the data |
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# using size_append. The .xz format has the size information available at |
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# the end of the file too, but it's in more complex format and it's good to |
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# avoid changing the part of the boot code that reads the uncompressed size. |
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# Note that the bytes added by size_append will make the xz tool think that |
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# the file is corrupt. This is expected. |
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# |
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# xzmisc doesn't use size_append, so it can be used to create normal .xz |
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# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very |
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# big dictionary would increase the memory usage too much in the multi-call |
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# decompression mode. A BCJ filter isn't used either. |
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quiet_cmd_xzkern = XZKERN $@ |
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cmd_xzkern = (cat $(filter-out FORCE,$^) | \ |
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sh $(srctree)/scripts/xz_wrap.sh && \ |
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$(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
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(rm -f $@ ; false) |
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quiet_cmd_xzmisc = XZMISC $@ |
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cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ |
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xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ |
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(rm -f $@ ; false)
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