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///p" 22 23quiet_cmd_offsets = GEN $@ 24define cmd_offsets 25 mkdir -p $(dir $@); \ 26 cat $< | \ 27 (set -e; \ 28 echo "#ifndef __ASM_OFFSETS_H__"; \ 29 echo "#define __ASM_OFFSETS_H__"; \ 30 echo "/*"; \ 31 echo " * DO NOT MODIFY."; \ 32 echo " *"; \ 33 echo " * This file was generated by $(srctree)/Kbuild"; \ 34 echo " *"; \ 35 echo " */"; \ 36 echo ""; \ 37 sed -ne $(sed-y); \ 38 echo ""; \ 39 echo "#endif" ) > $@ 40endef 41 42# We use internal kbuild rules to avoid the "is up to date" message from make 43arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE 44 $(Q)mkdir -p $(dir $@) 45 $(call if_changed_dep,cc_s_c) 46 47$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild 48 $(call cmd,offsets) 49 50