#
# Kbuild for top-level directory of the kernel
# This file takes care of the following:

# Generate asm-offsets.h 
#

offsets-file := include/generated/asm-offsets.h

always  := $(offsets-file)
targets := $(offsets-file)
targets += arch/$(SRCARCH)/asm-offsets.s
 
# Default sed regexp - multiline due to syntax constraints
define sed-y
	"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
endef

quiet_cmd_offsets = GEN     $@
define cmd_offsets
	(set -e; \
	 echo "#ifndef __ASM_OFFSETS_H__"; \
	 echo "#define __ASM_OFFSETS_H__"; \
	 echo "/*"; \
	 echo " * DO NOT MODIFY."; \
	 echo " *"; \
	 echo " * This file was generated by $(srctree)/Kbuild"; \
	 echo " *"; \
	 echo " */"; \
	 echo ""; \
	 sed -ne $(sed-y) $<; \
	 echo ""; \
	 echo "#endif" ) > $@
endef

# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/asm-offsets.s: $(srctree)/arch/$(SRCARCH)/asm-offsets.c  FORCE
	$(Q)mkdir -p $(dir $@)
	$(call if_changed_dep,cc_s_c)

$(offsets-file): arch/$(SRCARCH)/asm-offsets.s Kbuild
	$(call cmd,offsets)

