1# 2# Kbuild for top-level directory of the kernel 3# This file takes care of the following: 4# 1) Generate asm-offsets.h 5 6##### 7# 1) Generate asm-offsets.h 8# 9 10offsets-file := include/asm-$(ARCH)/asm-offsets.h 11 12always := $(offsets-file) 13targets := $(offsets-file) 14targets += arch/$(ARCH)/kernel/asm-offsets.s 15 16# Default sed regexp - multiline due to syntax constraints 17define sed-y 18 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" 19endef 20# Override default regexp for specific architectures 21sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}" 22 23quiet_cmd_offsets = GEN $@ 24define cmd_offsets 25 (set -e; \ 26 echo "#ifndef __ASM_OFFSETS_H__"; \ 27 echo "#define __ASM_OFFSETS_H__"; \ 28 echo "/*"; \ 29 echo " * DO NOT MODIFY."; \ 30 echo " *"; \ 31 echo " * This file was generated by $(srctree)/Kbuild"; \ 32 echo " *"; \ 33 echo " */"; \ 34 echo ""; \ 35 sed -ne $(sed-y) $<; \ 36 echo ""; \ 37 echo "#endif" ) > $@ 38endef 39 40# We use internal kbuild rules to avoid the "is up to date" message from make 41arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE 42 $(Q)mkdir -p $(dir $@) 43 $(call if_changed_dep,cc_s_c) 44 45$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild 46 $(Q)mkdir -p $(dir $@) 47 $(call cmd,offsets) 48 49