1# 2# Kbuild for top-level directory of U-Boot 3# This file takes care of the following: 4# 1) Generate generic-asm-offsets.h 5# 2) Generate asm-offsets.h 6 7# Default sed regexp - multiline due to syntax constraints 8define sed-y 9 "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ 10 /^->/{s:->#\(.*\):/* \1 */:; \ 11 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ 12 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ 13 s:->::; p;}" 14endef 15 16# Use filechk to avoid rebuilds when a header changes, but the resulting file 17# does not 18define filechk_offsets 19 (set -e; \ 20 echo "#ifndef $2"; \ 21 echo "#define $2"; \ 22 echo "/*"; \ 23 echo " * DO NOT MODIFY."; \ 24 echo " *"; \ 25 echo " * This file was generated by Kbuild"; \ 26 echo " */"; \ 27 echo ""; \ 28 sed -ne $(sed-y); \ 29 echo ""; \ 30 echo "#endif" ) 31endef 32 33##### 34# 1) Generate generic-asm-offsets.h 35 36generic-offsets-file := include/generated/generic-asm-offsets.h 37 38always := $(generic-offsets-file) 39targets := lib/asm-offsets.s 40 41# We use internal kbuild rules to avoid the "is up to date" message from make 42lib/asm-offsets.s: lib/asm-offsets.c FORCE 43 $(Q)mkdir -p $(dir $@) 44 $(call if_changed_dep,cc_s_c) 45 46$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE 47 $(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__) 48 49##### 50# 2) Generate asm-offsets.h 51# 52 53ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),) 54offsets-file := include/generated/asm-offsets.h 55endif 56 57always += $(offsets-file) 58targets += arch/$(ARCH)/lib/asm-offsets.s 59 60CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY 61 62# We use internal kbuild rules to avoid the "is up to date" message from make 63arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE 64 $(Q)mkdir -p $(dir $@) 65 $(call if_changed_dep,cc_s_c) 66 67$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE 68 $(call filechk,offsets,__ASM_OFFSETS_H__) 69