kbuild: cherry-pick kbuild changes from Linux
b42841b7bb62 kbuild: Get rid of KBUILD_STR 2aedcd098a94 kbuild: suppress annoying "... is up to date." message 9c8fa9bc08f6 kbuild: fix if_change and friends to consider argument order ebf003f0cfb3 kbuild: Consolidate header generation from ASM offset information 2982c953570b kbuild: remove redundant $(wildcard ...) for cmd_files calculation 8a78756eb545 kbuild: create object directories simpler and faster 4d4b5c2e3b6e treewide: remove explicit rules for *offsets.s 01d509a48b46 kbuild: remove unimportant comments from ./Kbuild Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada
Tom Rini
parent
c3da3f5808
commit
b5a2046376
45
Kbuild
45
Kbuild
@ -1,54 +1,20 @@
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# SPDX-License-Identifier: GPL-2.0
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#
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# Kbuild for top-level directory of U-Boot
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# This file takes care of the following:
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# 1) Generate generic-asm-offsets.h
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# 2) Generate asm-offsets.h
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# Default sed regexp - multiline due to syntax constraints
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define sed-y
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"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
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/^->/{s:->#\(.*\):/* \1 */:; \
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s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
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s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
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s:->::; p;}"
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endef
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# Use filechk to avoid rebuilds when a header changes, but the resulting file
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# does not
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define filechk_offsets
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(set -e; \
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echo "#ifndef $2"; \
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echo "#define $2"; \
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echo "/*"; \
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echo " * DO NOT MODIFY."; \
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echo " *"; \
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echo " * This file was generated by Kbuild"; \
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echo " */"; \
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echo ""; \
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sed -ne $(sed-y); \
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echo ""; \
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echo "#endif" )
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endef
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#####
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# 1) Generate generic-asm-offsets.h
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# Generate generic-asm-offsets.h
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generic-offsets-file := include/generated/generic-asm-offsets.h
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always := $(generic-offsets-file)
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targets := lib/asm-offsets.s
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# We use internal kbuild rules to avoid the "is up to date" message from make
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lib/asm-offsets.s: lib/asm-offsets.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE
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$(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__)
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#####
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# 2) Generate asm-offsets.h
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#
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# Generate asm-offsets.h
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ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),)
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offsets-file := include/generated/asm-offsets.h
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@ -59,10 +25,5 @@ targets += arch/$(ARCH)/lib/asm-offsets.s
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CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY
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# We use internal kbuild rules to avoid the "is up to date" message from make
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arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE
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$(call filechk,offsets,__ASM_OFFSETS_H__)
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3
Makefile
3
Makefile
@ -2241,8 +2241,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))
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# read all saved command lines
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targets := $(wildcard $(sort $(targets)))
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cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
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cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
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ifneq ($(cmd_files),)
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$(cmd_files): ; # Do not try to update included dependency files
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@ -7,6 +7,7 @@ quote := "
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squote := '
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empty :=
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space := $(empty) $(empty)
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space_escape := _-_SPACE_-_
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pound := \#
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###
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@ -234,10 +235,10 @@ objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
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# See Documentation/kbuild/makefiles.txt for more info
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ifneq ($(KBUILD_NOCMDDEP),1)
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# Check if both arguments has same arguments. Result is empty string if equal.
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# User may override this check using make KBUILD_NOCMDDEP=1
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arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
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$(filter-out $(cmd_$@), $(cmd_$(1))) )
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# Check if both arguments are the same including their order. Result is empty
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# string if equal. User may override this check using make KBUILD_NOCMDDEP=1
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arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
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$(subst $(space),$(space_escape),$(strip $(cmd_$1))))
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else
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arg-check = $(if $(strip $(cmd_$@)),,1)
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endif
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@ -259,7 +260,7 @@ any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
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if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
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@set -e; \
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$(echo-cmd) $(cmd_$(1)); \
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printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
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printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
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# Execute the command and also postprocess generated .d dependencies file.
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if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
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@ -267,14 +268,14 @@ if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
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$(echo-cmd) $(cmd_$(1)); \
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scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
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rm -f $(depfile); \
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mv -f $(dot-target).tmp $(dot-target).cmd)
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mv -f $(dot-target).tmp $(dot-target).cmd, @:)
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# Usage: $(call if_changed_rule,foo)
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# Will check if $(cmd_foo) or any of the prerequisites changed,
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# and if so will execute $(rule_foo).
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if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
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@set -e; \
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$(rule_$(1)))
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$(rule_$(1)), @:)
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###
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# why - tell why a a target got build
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@ -75,17 +75,6 @@ ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(h
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include scripts/Makefile.host
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endif
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# Uncommented for U-Boot
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# We need to create output dicrectory for SPL and TPL even for in-tree build
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#ifneq ($(KBUILD_SRC),)
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# Create output directory if not already present
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_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
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# Create directories for object files if directory does not exist
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# Needed when obj-y := dir/file.o syntax is used
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_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
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#endif
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ifndef obj
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$(warning kbuild: Makefile.build is included improperly)
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endif
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@ -441,11 +430,14 @@ FORCE:
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# optimization, we don't need to read them if the target does not
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# exist, we will rebuild anyway in that case.
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targets := $(wildcard $(sort $(targets)))
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cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
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cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
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ifneq ($(cmd_files),)
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include $(cmd_files)
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endif
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# Create directories for object files if they do not exist
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obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
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$(shell mkdir -p $(obj-dirs))
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.PHONY: $(PHONY)
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@ -53,15 +53,6 @@ host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
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host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
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host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
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# output directory for programs/.o files
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# hostprogs-y := tools/build may have been specified.
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# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
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host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
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host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
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__hostprogs := $(addprefix $(obj)/,$(__hostprogs))
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host-csingle := $(addprefix $(obj)/,$(host-csingle))
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host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
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host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
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@ -72,9 +63,6 @@ host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib))
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host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
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host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
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host-shared := $(addprefix $(obj)/,$(host-shared))
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host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
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obj-dirs += $(host-objdirs)
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#####
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# Handle options to gcc. Support building with separate output directory
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@ -57,15 +57,11 @@ single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
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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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# 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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@ -88,7 +84,6 @@ 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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# These flags are needed for modversions and compiling, so we define them here
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# already
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@ -97,10 +92,10 @@ obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
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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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name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
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basename_flags = -DKBUILD_BASENAME=$(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,$(modname)))")
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-DKBUILD_MODNAME=$(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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@ -153,7 +148,7 @@ endif
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# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
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c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
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$(__c_flags) $(modkern_cflags) \
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-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
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$(basename_flags) $(modname_flags)
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a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
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$(__a_flags) $(modkern_aflags)
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@ -576,3 +571,32 @@ quiet_cmd_fdtgrep = FDTGREP $@
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quiet_cmd_fdt_rm_props = FDTGREP $@
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cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
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$(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS)))
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# ASM offsets
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# ---------------------------------------------------------------------------
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# Default sed regexp - multiline due to syntax constraints
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define sed-offsets
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"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
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/^->/{s:->#\(.*\):/* \1 */:; \
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s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
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s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
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s:->::; p;}"
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endef
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# Use filechk to avoid rebuilds when a header changes, but the resulting file
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# does not
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define filechk_offsets
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(set -e; \
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echo "#ifndef $2"; \
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echo "#define $2"; \
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echo "/*"; \
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echo " * DO NOT MODIFY."; \
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echo " *"; \
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echo " * This file was generated by Kbuild"; \
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echo " */"; \
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echo ""; \
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sed -ne $(sed-offsets); \
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echo ""; \
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echo "#endif" )
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endef
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