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u-boot/Kbuild
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# | |
# Kbuild for top-level directory of U-Boot | |
# This file takes care of the following: | |
# 1) Generate generic-asm-offsets.h | |
# 2) Generate asm-offsets.h | |
# Default sed regexp - multiline due to syntax constraints | |
define sed-y | |
"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ | |
/^->/{s:->#\(.*\):/* \1 */:; \ | |
s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ | |
s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ | |
s:->::; p;}" | |
endef | |
# Use filechk to avoid rebuilds when a header changes, but the resulting file | |
# does not | |
define filechk_offsets | |
(set -e; \ | |
echo "#ifndef $2"; \ | |
echo "#define $2"; \ | |
echo "/*"; \ | |
echo " * DO NOT MODIFY."; \ | |
echo " *"; \ | |
echo " * This file was generated by Kbuild"; \ | |
echo " */"; \ | |
echo ""; \ | |
sed -ne $(sed-y); \ | |
echo ""; \ | |
echo "#endif" ) | |
endef | |
##### | |
# 1) Generate generic-asm-offsets.h | |
generic-offsets-file := include/generated/generic-asm-offsets.h | |
always := $(generic-offsets-file) | |
targets := lib/asm-offsets.s | |
# We use internal kbuild rules to avoid the "is up to date" message from make | |
lib/asm-offsets.s: lib/asm-offsets.c FORCE | |
$(Q)mkdir -p $(dir $@) | |
$(call if_changed_dep,cc_s_c) | |
$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE | |
$(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__) | |
##### | |
# 2) Generate asm-offsets.h | |
# | |
ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),) | |
offsets-file := include/generated/asm-offsets.h | |
endif | |
always += $(offsets-file) | |
targets += arch/$(ARCH)/lib/asm-offsets.s | |
CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY | |
# We use internal kbuild rules to avoid the "is up to date" message from make | |
arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE | |
$(Q)mkdir -p $(dir $@) | |
$(call if_changed_dep,cc_s_c) | |
$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE | |
$(call filechk,offsets,__ASM_OFFSETS_H__) |