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https://github.com/torvalds/linux
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bd70134396
For one, there's no point in the respective pieces to be rebuilt unconditionally on each and every rebuild. Second there's no need to invent a custom rule for generating the .s file from the .c source - we can simply use the generic rule here. And finally, $(obj) should be used to refer to files in the build tree (rather than spelling out the subdirectory). Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
48 lines
1.3 KiB
Makefile
48 lines
1.3 KiB
Makefile
hostprogs-y := modpost mk_elfconfig
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always := $(hostprogs-y) empty.o
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modpost-objs := modpost.o file2alias.o sumversion.o
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devicetable-offsets-file := devicetable-offsets.h
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define sed-y
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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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quiet_cmd_offsets = GEN $@
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define cmd_offsets
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(set -e; \
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echo "#ifndef __DEVICETABLE_OFFSETS_H__"; \
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echo "#define __DEVICETABLE_OFFSETS_H__"; \
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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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echo ""; \
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sed -ne $(sed-y) $<; \
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echo ""; \
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echo "#endif" ) > $@
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endef
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$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s
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$(call if_changed,offsets)
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targets += $(devicetable-offsets-file) devicetable-offsets.s
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# dependencies on generated files need to be listed explicitly
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$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
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$(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
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quiet_cmd_elfconfig = MKELF $@
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cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@
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$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE
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$(call if_changed,elfconfig)
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targets += elfconfig.h
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