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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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kbuild: simplify single target rules
The dependency will be checked anyway after Kbuild descends into a sub-directory. Skip object/source dependency checks in top Makefile. VPATH can be simpler since the top Makefile no longer checks the presence of the source file, which is located in in the external module directory. One good thing is, it can compile an object from a generated source file. $ make crypto/rsapubkey.asn1.o ... ASN.1 crypto/rsapubkey.asn1.c CC crypto/rsapubkey.asn1.o Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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6b12de69ad
45
Makefile
45
Makefile
@ -219,7 +219,7 @@ objtree := .
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src := $(srctree)
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obj := $(objtree)
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VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
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VPATH := $(srctree)
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export srctree objtree VPATH
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@ -1699,31 +1699,23 @@ tools/%: FORCE
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# target-dir => where to store outputfile
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# build-dir => directory in kernel source tree to use
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ifeq ($(KBUILD_EXTMOD),)
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build-dir = $(patsubst %/,%,$(dir $@))
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target-dir = $(dir $@)
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else
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zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
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build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
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target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
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endif
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build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@
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build-dir = $(patsubst %/,%,$(dir $(build-target)))
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%.s: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.i: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.o: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.lst: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.s: %.S prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.o: %.S prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.symtypes: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.ll: %.c prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
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%.i: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.ll: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.lst: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.o: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.s: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.symtypes: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
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%.ko: %.o
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$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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# Modules
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PHONY += /
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@ -1733,9 +1725,6 @@ PHONY += /
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Documentation/ samples/: headers_install
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%/: prepare FORCE
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$(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir)
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%.ko: prepare FORCE
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$(Q)$(MAKE) $(build)=$(build-dir) $(@:.ko=.o)
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$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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# FIXME Should go into a make.lib or something
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# ===========================================================================
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